25-28 September 2018
Schloss Schönbrunn
Europe/Vienna timezone
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Contribution List

Displaying 186 contributions out of 186
Type: Oral Presentation Session: Smelting reduction
Track: Cokemaking
The FINEX® process has been developed since 1992, starting from lab scale tests to constructing a pilot, a demo and two industrial plants consecutively in Pohang Works, South Korea. It has been 11 years since the first 1.5 MTPA commercial plant, #2 FINEX, began operating. The cumulative production of #2 FINEX achieved 14 million tons of hot metal and the availability in 2017 hit the record high w ... More
Presented by Mr. Dongyoon PARK on 26 Sep 2018 at 09:00
Type: Poster Session: Postersession and Coffee Break
Track: Poster
The converter vanadium slag is a byproduct of the iron making process when using the vanadium titanomagnetite as the iron raw material. A cleaner process including calcified roasting, dilute acid leaching, precipitation purification, vanadium precipitation with ammonium salt followed by pyrogenic decomposition was proposed to extract vanadium resource from this slag. And then vanadium pentoxide wi ... More
Presented by Dr. juhua ZHANG on 26 Sep 2018 at 15:32
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Blast furnace ironmaking
A multi-coupled three-dimensional transient model is proposed for simulation of blast-furnace (BF) iron-making processes. The model couples the whole thermo-fluid flow regions in the BF internal, including shaft, belly, hearth and raceway. Furthermore, the internal fluid flow, heat/mass transfer process is coupled with the heat transfer taking place in the outside refractory walls enclosing the BF ... More
Presented by Dr. Jianbo HUANG on 26 Sep 2018 at 09:40
Type: Oral Presentation Session: Pelletising
Track: Pelletising
With the rapid development of iron and steel industry in China, the iron ore pellet as an essential raw material plays an important role in the blast furnace. Due to large-scale production of iron ore pellet, microscopic characterization is an important step in quality control. The structure and distribution of minerals in a pellet and the bonding types at point contacts between the grains strongl ... More
Presented by Prof. Wei WANG on 26 Sep 2018 at 14:50
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Blast furnace ironmaking
Tuyere is the equipment which is supposed to sustain one of the most adverse conditions inside the Blast Furnace. Reliability of Tuyere is very important for trouble free safe operation of Blast furnace. Failure of tuyere increases cost of operation in terms of increased fuel rate and production loss as well as create hazard for the process and human. In front of the tuyere almost 2200 – 2300 de ... More
Presented by Mr. Ujjal GHOSH on 25 Sep 2018 at 15:10
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Iron ore production and handling
Limonitic laterite is an iron ore consisting of a mixture of hydrated iron oxide-hydroxides in varying composition. The generic formula of limonitic laterite is expressed as (Fe, Ni, Mg)O∙(OH)∙H2O. It is possible to obtain high quality ferronickel and iron oxide, which can be used as a blast furnace charge, through selective reduction of Ni using reduction potential difference between Fe and ... More
Presented by Mr. Gi Ho LA on 26 Sep 2018 at 11:30
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Iron ore production and handling
The Influence of pore on reduction behavior of iron oxide is very important. The pore affects the reduction gas diffusion and thus the reduction behavior is affected. However, in most studies, porosity was used only as a tool for the resultant interpretation of the reduction. There is insufficient studies to identify porosity by artificially changing pore. In this study, we investigate the reducti ... More
Presented by Mr. Sang Gyun SHIN on 27 Sep 2018 at 13:00
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Blast furnace ironmaking
In the blast furnace (BF) process, the presence of alkalis (Na, K) is known to have negative influences on the process due to the catalytic effect on coke gasification, destruction of carbon structure by intercalation of alkali, scaffold formation and refractory attack. Alkalis are introduced with the raw materials and due to alkali circulation; alkalis are picked-up on the way to the higher tempe ... More
Presented by Mrs. Amanda GULLBERG on 26 Sep 2018 at 11:10
Type: Oral Presentation Session: Cokemaking
Track: Cokemaking
Coke is a key reagent in the iron blast furnace process. To enhance its performance in the blast furnace a better understanding of the kinetics of coke reactions in the blast furnace is necessary. Using a synthetic coke (coke analogue) the gasification rate in CO<sub>2</sub> of a coke containing calcia and calcium aluminates (CA6, CA, C3A) was studied. The coke analogue is a laboratory material w ... More
Presented by Apsara JAYASEKARA on 25 Sep 2018 at 11:45
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Blast furnace ironmaking
Copper stave has been widely applied in large blast furnaces especially whose inner volume exceed 2000m3 due to high cooling capacity. In the past years, cooper staves suffered damages in some blast furnace, dwindling the campaign life of blast furnace. For this problem, the damage mechanism of the cooling stave was studied by analyzing the chemical composition, thermal conductivity, metallographi ... More
Presented by Prof. Haibin ZUO on 27 Sep 2018 at 13:40
Type: Poster Session: Postersession and Coffee Break
Track: Poster
The blast furnace (BF) crucible breakout is not uncommon. More and more attentions have been paid on the penetration of molten iron and hearth lining erosion of BF. The iron skull, which is a layer of iron attached on the inner surface of the lining, provides a barrier between carbon brick and molten iron. Formation of a stable iron skull on the inner surface of the hearth lining could largely pro ... More
Presented by Mr. Xu WEN, Prof. Wei WANG, Dr. Runsheng XU on 26 Sep 2018 at 15:26
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Blast furnace ironmaking
Low carbon operation of blast furnace is important technology for mitigation of CO2 emission from ironmaking process. This operation means decreasing of coke rate in raw material charging amount into blast furnace. This situation makes severe condition of gas permeability in especially cohesive zone of blast furnace. Therefore, cohesive zone formation behavior should be correctly understood. In th ... More
Presented by Prof. Ko-ichiro OHNO on 26 Sep 2018 at 10:50
Type: Oral Presentation Session: Sintering
Track: Sintering
It is important to understand solid–liquid equilibrium of Al<sub>2</sub>O<sub>3</sub>-CaO-Fe<sub>2</sub>O<sub>3</sub>-SiO<sub>2</sub> system to understand the sintering reaction, although the sintering reaction is a non-equilibrium and inhomogeneous. Phase equilibrium calculation of this system has some problems, such as thermodynamic models for some silico-ferrite of aluminum and calcium phases ... More
Presented by Dr. Reiko MURAO on 25 Sep 2018 at 17:15
Type: Oral Presentation Session: Automation and digitalization in coke and ironmaking
Track: Automation and digitalization in coke and ironmaking
Modern Iron & Steel Works as a rule are equipped with powerful distributed control systems (DCS) and databases. Implementation of DSC system solves the problem of storage, control, protection, entry, editing and retrieving of information, as well as creation of the necessary reporting data. At the same time, Russian domestic and international experience shows that improvement in quality, energy ef ... More
Presented by Dr. Yakov GORDON on 26 Sep 2018 at 14:30
Type: Oral Presentation Session: CO2 reduction and energy saving
Track: CO2 reduction and energy saving
Ferro-coke is a highly reactive coke and considered a promising advanced burden material for blast furnace ironmaking due to a potential of decreasing RAR and CO2 emission. The essential reason is it reacts with CO2 in BF gases at lower temperatures, which is resulted in by the catalytic effect of metallic iron, and leads to a lower temperature of the thermal reserve zone. However, since iron ores ... More
Presented by Prof. Xuegong BI on 25 Sep 2018 at 11:45
Type: Oral Presentation Session: Sintering
Track: Sintering
Improvement of sinter reducibility is necessary for high production rate of blast furnace, involving reduction of the slag component in the sinter. Replacement of peridotite (MgO-SiO2) for dolomite (CaMg(CO3)2) is a potent option as dolomite does not contain SiO2. However, dolomite is hard to assimilate and deteriorates sinter strength. In this study, assimilation behavior of dolomite has been i ... More
Presented by Mr. Kohei OKADA on 25 Sep 2018 at 16:15
Type: Poster Session: Postersession and Coffee Break
Track: Poster
Blast furnace slag(BFS) is the most important by-product in iron and steel industry. Due to its high output and high slag temperature, the BFS is a very good heat source. Recovery of sensible heat from BFS is essential for saving energy, reducing emission and improving energy utilization efficiency in iron and steel industry. The process of bead-forming of BFS by gas quenching can effectively reco ... More
Presented by Dr. Yue KANG on 26 Sep 2018 at 15:23
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Blast furnace ironmaking
The Bell Less Top Charging System invented and developed by Paul Wurth, is commonly recognized as Best Available Technology in the domain of blast furnace charging. This paper describes how the 2nd gen Bell Less Top, combined with stockhouse improvements and intelligent sampling devices can be used in order to expand blast furnace charging process know-how and to further optimize Blast Furnace cha ... More
Presented by Mr. Cristiano CASTAGNOLA, Mr. Christian DE GRUITER on 27 Sep 2018 at 14:00
Type: Oral Presentation Session: Environmental control in coke and ironmaking
Track: Environmental control in coke and ironmaking
Gwangyang No.1 blast furnace blowed in 2013 with 6,000㎥ inner volume (first half in 2017, Po 2.36t/d/㎥, RR 488.0kg/t-p), and dry-type dedusting system is installed at that time. The introduction background is electricity cost saving through TRT power generation and reducing the amount of waste water discharge, compared with wet-type dedusting system. The dedusting system of Gwangyang No.1 BF ... More
Presented by Mr. Ki-Gun HONG on 27 Sep 2018 at 13:40
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Blast furnace ironmaking
The steps from data to information to knowledge and finally standardized operation for the blast furnace are put into the overall picture of digitalization in the ironmaking area. By introduction of expert systems individual judgement of process conditions and required actions receive support by rule based decision systems with an incorporated, standardized operation strategy that has been jointly ... More
Presented by Dieter BETTINGER on 26 Sep 2018 at 09:00
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Blast furnace ironmaking
Intensive operation of blast furnace allows increase in production of hot metal. However, furnace life could be sacrificed. CherMK and Hatch systematically monitor conditions of BF lining using Acousto Ultrasonic-Echo (AU-E) non-destructive methodology. Testing of blast furnaces revealed problematic areas with refractory deterioration, formation of elephant foot, extent of accretion and rate of re ... More
Presented by Dr. Yakov GORDON on 25 Sep 2018 at 10:45
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Smelting reduction
Abstract: According to the coexistence theory of slag structure, a calculation model of concentration of SiO2-CaO-Al2O3-FeO of depleted copper slag was established. The model was used to calculate and analyze the effects of slag composition, temperature (T) and basicity (B) on the activity of FeO (NFeO). The results show that NFeO tends to increase and then decrease with the increase of basicity, ... More
Presented by Prof. Guojun MA on 26 Sep 2018 at 13:30
Type: Oral Presentation Session: Recycling of in-plant residues
Track: Recycling of in-plant residues
At SSAB Europe’s integrated steel plant in Luleå, Sweden, much effort is directed towards maximising the recycling of in-plant residues. As the blast furnace (BF) operates with a 100 % pellet burden, the main part of all dusts and sludge are recycled via a BF cold bonded briquette and by the BF-injection of its flue dust. However, BF sludge is not presently recycled due to concerns regarding BF ... More
Presented by Ms. Katarina LUNDKVIST on 26 Sep 2018 at 14:30
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Blast furnace ironmaking
The rising amount of injected through the tuyeres pulverised coal makes increasingly difficult its conversion within the raceway zones despite of numerous measures to improve gasification of coal particles. Unburnt particles can nevertheless be partly consumed outside the raceway by so called secondary conversion reactions. From this point of view, properties of char that leaves the raceway were i ... More
Presented by Dr. Alexander BABICH on 27 Sep 2018 at 11:00
Type: Oral Presentation Session: Recycling of in-plant residues
Track: Recycling of in-plant residues
The recycling of steel plant by-products is a key issue for all steelmakers. For these materials to be fully utilised without incurring environmental and economical penalties they need to be better understood with respect to their composition (morphology, phases and phase distribution). Research is being undertaken that aims to realise the value of steel plant by-products to the Australian steel i ... More
Presented by Prof. Brian MONAGHAN on 26 Sep 2018 at 13:50
Type: Oral Presentation Session: Cokemaking
Track: Cokemaking
In recent years we have conducted integrated mechanistic studies to understand the structures controlling coke strength and how these structures form in the plastic layer. These have involved micro CT studies of coke structures and calculation of the response of these structures to stress as well as fractographic studies of fracture surfaces in coke. A number of studies have identified that the bo ... More
Presented by Dr. David JENKINS on 25 Sep 2018 at 10:45
Type: Oral Presentation Session: CO2 reduction and energy saving
Track: CO2 reduction and energy saving
Japanese steelmakers have executed “development of technologies for environmentally harmonized steelmaking process, ‘CO2 ultimate reduction in steelmaking process by innovative technology for Cool Earth 50’ (COURSE50)” since FY 2008. This is a national project commissioned by the New Energy and Industrial Technology Development Organization (NEDO). The target of COURSE50 is the mitigatio ... More
Presented by Mr. Shigeaki TONOMURA on 25 Sep 2018 at 16:35
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Blast furnace ironmaking
Coke degradation by the reaction with carbon dioxide is known to cause the fine particle generation, deteriorating gas and liquid permeability in a blast furnace. Coke degradation must be suppressed or controlled in order to achieve stable operation of blast furnace. In this study, the mechanism of the coke degradation by the reaction with carbon dioxide, i.e. solution loss reaction, was investiga ... More
Presented by Dr. Koji SAITO on 27 Sep 2018 at 08:50
Type: Poster Session: Postersession and Coffee Break
Track: Cokemaking
Metallurgical coke remains an irreplaceable material in the production of hot metal in blast furnaces, providing the heat and the reducible gases necessary for the process. Coke also play an important structural role in the blast furnace, providing a permeable bed for the passage of gases and liquids. Coke mechanical strength is a key factor for the performance of blast furnace and is essentially ... More
Presented by Prof. Eduardo OSÓRIO on 26 Sep 2018 at 15:21
Type: Oral Presentation Session: Cokemaking
Track: Cokemaking
Development of coke production technology which can maintain high coke strength with use of certain amount of low rank coal is needed. Accordingly, it is important to investigate influence of coke pore structure on coke strength and dominant factors of coke strength. Anraku et al. established a Stress simulation method by using three-dimension images of coke which were taken by X-ray CT. In this p ... More
Presented by Mr. Nagashima YOSHIHIRO on 25 Sep 2018 at 11:25
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Blast furnace ironmaking
Coke quality plays an important role in the blast furnace process. The current coke quality parameters used in Tata Steel, IJmuiden are the I40, I10 and CSR. With the introduction of more different types of coals there is a need for a more detailed characterisation of the coke. Especially for the behaviour of coke in the lower parts of the blast furnace a parameter is lacking. Previous research in ... More
Presented by Mr. Bert GOLS on 27 Sep 2018 at 09:30
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Blast furnace ironmaking
The parameter that has the largest impact on the campaign life of a blast furnace is the health of the hearth refractory lining. When this lining is severely deteriorated, the furnace must be shut down for either a repair or a reline. This means that it is crucial to continuously monitor the health of the hearth refractory lining. However, this has proven to be difficult in the past due to the obs ... More
Presented by Dr. Afshin SADRI on 25 Sep 2018 at 11:45
Type: Oral Presentation Session: Keynote
Track: Keynote
The blast furnace is worldwide the dominant metallic product supplier for crude steel production. It has reached an extreme high technological standard with large efficiency and low reductant rates. Independently from the fact that the blast furnace has nearly reached its theoretical minimum in energy consumption it enables the operators a wide range of operation modes with a high flexibility. ... More
Presented by Hans-Bodo LÜNGEN on 25 Sep 2018 at 09:05
Type: Oral Presentation Session: Pelletising
Track: Pelletising
The straight grate and grate kiln indurating processes are the two proven and widely accepted iron ore pelletizing technologies. Hatch performed a technical and economic comparison between the two processes, emphasizing their specific advantages and applicability for selected regional conditions. The technology comparison is based on publicly available literature and our extensive database of iron ... More
Presented by Dr. Yakov GORDON on 26 Sep 2018 at 14:10
Type: Oral Presentation Session: Smelting reduction
Track: Smelting reduction
In two stage-smelting reduction process, it is desirable to decrease the reduction degree of iron ore in a pre-reducing unit by reducing its temperature to avoid any troubles due to stickiness of high reduced iron ore. However, less pre-reduced iron ore can induce direct reduction in a melter-gasifier, which can increase the consumption of coal. In this case, the portion of direct reduction can be ... More
Presented by Prof. Sung-Mo JUNG on 26 Sep 2018 at 09:20
Type: Oral Presentation Session: Sintering
Track: Sintering
Recently, steel industry confronts a high risk of deterioration of Iron ore property as well as mitigation of green-house gas and particulate in response to the environmental regulation. For particular, iron ore sintering in the integrated steelmaking process generates a high level of particulate due to use of fine ore. It is impossible to recover energy through by-product gas like BFG and COG in ... More
Presented by Mr. SEUNGYEON WON on 26 Sep 2018 at 14:10
Type: Oral Presentation Session: Recycling of in-plant residues
Track: Recycling of in-plant residues
In Egypt, the crude steel production has increased significantly with higher growth rate in the past years of the 21th century. Furthermore, many mill steel companies have been established for steel processing. With the increase in steel production and steel processing, a large amount of waste materials (slag, dust and mill scale) are produced. Mall scale is one of these waste materials produce ... More
Presented by Dr. Saeed GHALI on 26 Sep 2018 at 13:30
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Blast furnace ironmaking
Copper staves are used in blast furnaces to protect the steel shell from process heat loads. Staves have experienced premature failures such as cracks, broken water pipes/water leakage, and abrasion related wear. Relationships between copper stave failure and stave deformation have been reported in literature. A detailed assessment methodology is presented to estimate the thermomechanical bending ... More
Presented by Dr. Hamid GHORBANI on 27 Sep 2018 at 08:30
Type: Oral Presentation Session: Sintering
Track: Sintering
A CaO-Fe2O3 system is a fundamental binary system for the iron ore sintering process. Although the basic reactions have been investigated since the 1960s, melting and solidification caused by the combustion of coke results in an unstable state owing to extreme temperature variations. In this study, using a hot thermocouple method, samples of 10% CaO-90%Fe2O3 and 20%CaO-80%Fe2O3 were melted on a th ... More
Presented by Prof. Yoshiaki KASHIWAYA on 25 Sep 2018 at 15:30
Type: Oral Presentation Session: Sintering
Track: Sintering
Size segregation of the iron ore granules packed on a sinter strand has a significant influence on both airflow rate and temperature distribution through the bed. Therefore, it is a key factor that governs the efficiency of mass and heat transfer down the sinter bed. For a defined sinter feed and granule size distribution, it is possible to increase the size segregation through optimising the oper ... More
Presented by Prof. Tom HONEYANDS on 25 Sep 2018 at 14:30
Type: Oral Presentation Session: Modelling and simulation in coke and ironmaking
Track: Modelling and simulation in coke and ironmaking
Steelmaking following the blast furnace process route has a share of approximately 75 % of the worldwide steel production and thus is the primary source of steel. Due to the large size of blast furnaces and the extreme process conditions therein, the accessibility for measurements inside the furnace is very limited. Nevertheless, since the campaign life is closely related to the multiphase process ... More
Presented by Mr. Frederik BAMBAUER on 27 Sep 2018 at 08:50
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Blast furnace ironmaking
Since 21 century, the application of copper cooling stave has been an important technical measure to prolong the campaign life of modern blast furnace. Combined with the application of blast furnace copper cooling stave at Shougang Qian’an steel plant, the optimum design of copper cooling stave heat transfer research and structure parameters are discussed. The heat transfer parameters, structure ... More
Presented by Dr. Fuming ZHANG on 27 Sep 2018 at 10:20
Type: Poster Session: Postersession and Coffee Break
Track: Direct reduction
Substantial deposits of titanomagnetite ironsand are found throughout the west coast of the North Island of New Zealand (NZ). This titaniferous iron ore contains approximately 8% TiO2 equivalent, which prevents its use as a feedstock concentrate for conventional blast furnace (BF) processes. However, at present ~1.5 Mt pa is utilized in the rotary-kiln production of direct reduced iron (DRI), and ... More
Presented by Mr. Sigit PRABOWO on 26 Sep 2018 at 15:15
Type: Poster Session: Postersession and Coffee Break
Track: Poster
A state-of-the-art numerical model was developed for analyzing packed bed structures containing non-spherical solids such as cokes and the high-temperature melt trickle flow characteristics of such beds. This enables the direct 3-dimensional analysis of packed beds that are difficult to visualize in experimental tests. The advanced discrete element method with 3D scanning technology is employed as ... More
Presented by Dr. Shungo NATSUI on 26 Sep 2018 at 15:27
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Blast furnace ironmaking
Hearth and high heat load region are key factors affecting the campaign life of blast furnace, mainly for the erosion of carbon bricks lined on furnace bottom and hearth and damaged of cooling equipment of high heat load region. In this paper, the long life of high heat load region was studied. And the new furnace longevity technology in the area was developed, which was combined cooling structure ... More
Presented by Mr. chunlong WANG on 26 Sep 2018 at 11:50
Type: Oral Presentation Session: Sintering
Track: Sintering
In order to decrease Reducing Agent Rate (RAR) and CO2 emission of blast furnaces, it is important to decrease slag volume. In NSSMC, more than 70% of blast furnace burden is sinter ore, so slag volume control is very important. However slag contents of sinter feeds are increasing because of resource deterioration. Therefore, using high amount of iron ore concentrate, which has relatively lower sl ... More
Presented by Mr. Yasuhide YAMAGUCHI on 26 Sep 2018 at 10:50
Type: Oral Presentation Session: CO2 reduction and energy saving
Track: CO2 reduction and energy saving
The energy recovery system for FINEX® has been developed and adopted with commercial scale to the No.3 FINEX® plant at POSCO’s Pohang Works. The energy recovery system is composed of heat recovery steam generator, dry de-dusting, and expansion turbine–driven power generator, which are optimally configured with adjusting the balance between system efficiency and the process restrictions. For ... More
Presented by Dr. MYOUNG KYUN SHIN on 25 Sep 2018 at 11:05
Type: Oral Presentation Session: Sintering
Track: Sintering
Kakogawa Works of Kobe Steel, Ltd. has a set of sinter and pellet plants for the production of blast furnace raw materials. Recently, the use of magnetite fine ore has attracted attention while deterioration of iron ore grade. We clarified the problem of granulation and firing in using large quantity of magnetite fine ore, and developed countermeasures.
Presented by Mr. Koji OSUGA on 25 Sep 2018 at 11:05
Type: Oral Presentation Session: Cokemaking
Track: Cokemaking
Silica Bricks are made from Quartzite which mostly contents quartz phase. During making, the quartz is converted into phases like Tridymite and Cristobalite along with some amorphous phases. This polymorphic transformation in Silica brick is governed by the impurities present in parent quartzite and also with the addition of mineralizers. However in this process very little amount (<1%) of quartz ... More
Presented by Mr. Birendra PRASAD on 25 Sep 2018 at 16:15
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Blast furnace ironmaking
Improved permeability and increased gas utilization have been desired in order to achieve low coke rate operation of blast furnaces. Coke mixed charging in the ore layer is one measure for realizing these improvements. A new charging technique for mixing nut coke in the ore layer at a blast furnace with a center feed type bell-less top was developed and investigated in an experiment with a 1/18.8 ... More
Presented by Kyohei SUZUKI on 27 Sep 2018 at 14:00
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Blast furnace ironmaking
Increase in blast furnace useful volume in course of reconstruction projects and increase in intensity of furnace operation is the major trends in hot metal production in Russian Federation. In majority of furnace enlargement projects the supporting structure, furnace foundation and part of the infrastructure remains the same, while furnace proper is completely replaced with installation of the fo ... More
Presented by Mr. Dmitrii TIKHONOV on 26 Sep 2018 at 16:00
Type: Oral Presentation Session: Direct reduction
Track: Direct reduction
The future of the European steel industry demands solutions for carbon free production routes to fulfil the challenging goals of today‘s climate policies. In terms of CO2-emissions, the reduction process is the most relevant process – be it in a blast furnace or in a direct reduction plant. One solution to this issue could be the transition from fossil-based to hydrogen-based reduction of iron ... More
Presented by Prof. Marc HÖLLING on 27 Sep 2018 at 11:00
Type: Oral Presentation Session: Sintering
Track: Sintering
Acute crisis of water in the region compelled the usage of recycled water with high conductivity that helped in increasing granulation. However, usage of recycled water beyond 50% has resulted in undesired accretion in the Mixing and Nodulizing Drum. Magnetized water reduced contact angle and improved the granulation of green mix. The effect of magnetization of water was studied by varying magneti ... More
Presented by Mr. Acharyulu AVB on 26 Sep 2018 at 11:50
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Sintering
For decreasing CO2 emission from iron making process, increasing hydrogen concentration in blast furnace is suitable method. However, the property of iron ore agglomerate such as reducibility should be optimized because hydrogen reduction is endothermic reaction and temperature distribution in BF drastically changes by increasing hydrogen concentration. In this study, the effect of hydrogen concen ... More
Presented by Dr. TAICHI MURAKAMI on 26 Sep 2018 at 11:10
Type: Oral Presentation Session: Cokemaking
Track: Cokemaking
Highly-reactive coke can improve the reaction efficiency of blast furnace, as well as decrease the reduction agent ratio and CO2 emission. Ferro-coke, which is obtained by combining coal with iron ore during coking, has been studied as a novel highly-reactive coke. In this study, effect of three iron ore types (limonite, hematite and oolitic hematite) on the gas generation, volume behavior, and co ... More
Presented by Prof. Johannes SCHENK, Dr. Runsheng XU, Prof. Wei WANG on 25 Sep 2018 at 16:35
Type: Oral Presentation Session: Sintering
Track: Sintering
The influence of ordinary magnetite ratios on Hongge high-chromium vanadium-titanium magnetite (HCVTM) sinters was researched through sintering pot tests. The researches including yield, sintering ratio, tumbler index (TI), productivity, solid fuel consumption, reduction degradation index (RDI) and reduction index (RI) were tested and calculated. The addition of ordinary magnetite ore is an adjust ... More
Presented by Dr. Weidong TANG on 25 Sep 2018 at 11:25
Type: Poster Session: Postersession and Coffee Break
Track: Poster
The effect of ordinary magnetite ratios on the basic characteristics of Hongge high-chromium vanadium-titanium mixed ores was investigated through micro-sinter methods. The researches including assimilation characteristic, crystal intensity characteristic, bonding strength characteristic and fluidity characteristic were studied. With increase of ordinary magnetite ratios in Hongge high-chromium va ... More
Presented by Prof. Xiangxin XUE on 26 Sep 2018 at 15:17
Type: Poster Session: Postersession and Coffee Break
Track: Poster
Under the pressures of the decreases of high quality iron ore, the iron and steel enterprises in China turn to use low-quality ores which contain elements such as much silicon, aluminum, et al, in sintering. In order to understand the metallogenic and reduction mechanism of the low-quality iron ore sinter, in situ test were used in this study. The sinter samples were analyzed by X-ray diffraction, ... More
Presented by Prof. Wei WANG, Dr. Runsheng XU on 26 Sep 2018 at 15:35
Type: Oral Presentation Session: Sintering
Track: Sintering
The iron ore sintering process is essentially influenced by the permeability of the sinter bed. Higher amounts of ultra-fine iron ores lead to a weak granulation behaviour, which causes lower voidage in the sinter bed and therefore a decreasing bed permeability. Due to this, the application of ores with a size lower than 0.2 mm is limited. In this investigation the amount of ultra-fine ores (-0.1 ... More
Presented by Mr. Gabriel STEINDORF on 26 Sep 2018 at 11:10
Type: Oral Presentation Session: Recycling of in-plant residues
Track: Recycling of in-plant residues
High temperature experiments have been undertaken using equilibration, quenching and EPMA technique to characterise the phase equilibria of high Ti-containing slag systems. The experimental results have been presented in the form of pseudo-binary sections to show the effects of CaO, TiO2 and oxygen partial pressure on liquidus temperatures. The primary phases observed in the composition range i ... More
Presented by Prof. Baojun ZHAO on 26 Sep 2018 at 11:50
Type: Oral Presentation Session: CO2 reduction and energy saving
Track: Sintering
Cooling of hot sinter involves the release of significant quantities of energy and is a source of fugitive dust emissions. The increasing pressure that steel producers are facing in regard to energy consumption, reduction of CO2 and air emissions, require new processes and technologies to maximise energy recovery of the sinter cooling and to lower its environmental impact. Paul Wurth has been work ... More
Presented by Gilles KASS on 25 Sep 2018 at 10:45
Type: Oral Presentation Session: CO2 reduction and energy saving
Track: Sintering
In operational practice of the iron ore sintering machine, the increasing air leakage ratio will cause the higher electricity consumption of the suction fan, the higher solid fuel rate, the lower sinter productivity, and the worse sinter quality. In general, more than 50% of the leakage occurs at the pallets themselves and the interfaces between the pallets and the wind boxes. Basically, the sinte ... More
Presented by Dr. Jia-Shyan SHIAU on 25 Sep 2018 at 14:50
Type: Oral Presentation Session: Sintering
Track: Sintering
Pellets were introduced into the Blast furnaces at Tata Steel Jamshedpur post the commissioning of pellet plant in the year 2012. The new burden mix (sinter, ore and pellet) offered an opportunity to produce sinter using a new flux regime which permitted flexibility in ore mix and resulted in change of sinter properties. A strategic decision was taken to produce pellets at acidic/minimum flux regi ... More
Presented by Mr. Arunkumar CHELLADURAI, Mr. SRINIVASA REDDY ASADI on 26 Sep 2018 at 09:00
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Blast furnace ironmaking
A well operating hearth is a prerequisite for stable and effective blast furnace operation. On-line estimation of the liquid levels in the blast furnace hearth provides an effective means to prevent disturbances and to improve tap management. A mathematical model of the iron and slag levels in the hearth has been developed. The model is based on mass balances using information about the in- and ou ... More
Presented by Dr. Mikko HELLE on 25 Sep 2018 at 14:50
Type: Oral Presentation Session: Sintering
Track: Sintering
The qualities of iron ores have been deteriorating, which has influenced sinter quality and productivity adversely. In the sintering process, iron ore fines, fluxes such as limestone and coke breeze, are granulated, then charged and fired in a sinter machine. Sinter quality and productivity are strongly affected by the formation of initial sinter melt, assimilation and penetration into nucleus par ... More
Presented by Mr. Takahide HIGUCHI on 26 Sep 2018 at 09:20
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Blast furnace ironmaking
In recent years, dry de-dusting technology has been widely used. Alkali liquor spray scrubber was added after dry dust-catch process to removal such the corrosive medium as chlorine. However, the problem of corrosion cracking often occurred in the gas and hot blast pipes. The evaluating method was present through directly measuring the chlorine content in gas before and after alkali liquor spray s ... More
Presented by Dr. HUI CHEN on 27 Sep 2018 at 13:00
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Blast furnace ironmaking
Coke reactivity is one of the most important parameters that defines coke quality. Although coal parameters such as coal rank, maceral composition and ash chemistry are used as indicators of coke reactivity, they cannot fully predict it. It is well recognized that reactivity of coke is controlled by catalytic mineral matter and its porosity, particularly its nanoporosity (pores of nm in size). Ou ... More
Presented by Dr. Mihaela GRIGORE on 27 Sep 2018 at 09:10
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Blast furnace ironmaking
Throughout the past 3 years TeraWatt Group have participated in over than 30 blast furnace reconstruction projects. Over a dozen projects were focused on solving one of the most challenging issuess of the modern blast furnace process – significant standard cooling system (with untreated water) useful lifetime decrease, caused by rapid failure of cooling plates under pulverized coal injection co ... More
Presented by Olexandr VYNOHRADOV, Andrii KALANTARENKO on 27 Sep 2018 at 09:30
Type: Oral Presentation Session: CO2 reduction and energy saving
Track: CO2 reduction and energy saving
In COURSE50 STEP2, integrated verification tests of the reduction of CO2 emissions and CO2 separation from the blast furnace are being conducted, using a newly build 12 m3 experimental blast furnace and a 30-t-CO2/day chemical absorption process evaluation plant simultaneously. Tests have been carried out with the experimental blast furnace to establish a reaction-controlling technology to reduce ... More
Presented by Mr. Hirokazu YOKOYAMA on 25 Sep 2018 at 17:15
Type: Oral Presentation Session: Direct reduction
Track: Direct reduction
Due to the very fast reduction rate and its possibility to get rid of coke and other technical advantages the flash reduction iron making process has drawn a lot of concern by many experts and scholars in recent years. According to relative literatures, the derivative process of flash reduction of iron ore is analyzed. The development of the flash reduction iron making process at home and abroad i ... More
Presented by Dr. Lei GUO on 27 Sep 2018 at 10:20
Type: Oral Presentation Session: Smelting reduction
Track: Smelting reduction
In order to simulate synchronous distribution of coal (coke) and DRI (ore) in the Melter Gasifier of COREX-3000, with down moving of perimeter zone of char bed, we have studied by laboratory experiment effect of charging pattern and kind of material on the stock pile shape, distribution of ore/coal ratio, distribution of porosity and particle size segregation on radius direction. The differences ... More
Presented by Mr. Wanren XU on 26 Sep 2018 at 10:00
Type: Oral Presentation Session: Recycling of in-plant residues
Track: Recycling of in-plant residues
COREX shaft furnace dust contains large amounts of valuable elements, such as iron and carbon, and compared with blast furnace dust, it contains more metallic iron. Therefore, take appropriate process to recycle the COREX dust can further achieve efficient utilization of resources. The chemical composition, particle size distribution, microstructure and mineral composition of the dust were charact ... More
Presented by Dr. Zhengjian LIU on 26 Sep 2018 at 14:50
Type: Oral Presentation Session: Cokemaking
Track: Cokemaking
Despite the extensive research in the prediction of coke properties from the parent coals, at present, no single model exists to adequately predict coke quality from all coal basins. Whilst heavily used as a feature in early coke quality prediction models, the binding behaviour of the maceral components, termed fusibility, has had limited success in being implemented into a global prediction model ... More
Presented by Ms. Lauren NORTH on 25 Sep 2018 at 14:30
Type: Oral Presentation Session: CO2 reduction and energy saving
Track: CO2 reduction and energy saving
In COURSE50 STEP2, integrated verification tests of the mitigation of CO2 emissions and CO2 separation from blast furnaces are being conducted using a newly built 12m3 experimental blast furnace and a 30-t-CO2/day chemical absorption process evaluation plant simultaneously. The experimental blast furnace was constructed in Kimitsu Works and the construction was completed in September 2015. The e ... More
Presented by Mr. Kazumoto KAKIUCHI on 25 Sep 2018 at 16:15
Type: Oral Presentation Session: Sintering
Track: Sintering
Tata Steel is the pioneer in steel industry of India. Production started way back in 1911. However, the first sinter plant (known as SP1) was commissioned in 1958. It was a modest beginning at first, with production of acid sinter. Tata Steel has been sintering captive iron ore fines having high alumina (above 4%) and silica (about 1%). This typically represents the Indian situation where most iro ... More
Presented by Mr. Debanik MITRA on 26 Sep 2018 at 13:50
Type: Oral Presentation Session: Keynote
Track: Smelting reduction
FINEX® is an alternative iron making process to the blast furnace (BF) route and it is based on the direct use of iron ore fines and non-coking coal, which gives operational flexibility, cost competitiveness and environmental benefits compared to the conventional BF route. Continuous improvements are carried out to increase the process efficiency, including the latest developments of the energy r ... More
Presented by Dr. Sang-Ho YI on 26 Sep 2018 at 08:20
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Blast furnace ironmaking
In order to formulate shrinkage behavior of sinter during softening process, the effects of load and reducing gas composition on the shrinkage rate of sinter packed bed has been investigated using a softening-melting furnace. As a result, the shrinkage rate increased with increasing the load on the packed bed in temperature range from 1000 to 1200 °C, and decreased with increasing the reduction d ... More
Presented by Dr. Naoto YASUDA on 26 Sep 2018 at 16:20
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Blast furnace ironmaking
To achieve stable operation of coke mixed charging, it is essential to control coke segregation behavior in mixed layer. In this study, the effect of charging conditions and burden particle diameter of mixed coke ratio at blast furnace top were analyzed by numerical model based on discrete element method. Parameters necessary for calculation were optimized by experiment and calculation. Then, segr ... More
Presented by Mr. Koki TERUI on 26 Sep 2018 at 09:40
Type: Oral Presentation Session: Direct reduction
Track: Direct reduction
Midrex and Primetals Technologies have successfully completed their latest HBI projects for voestalpine Texas LLC/USA and LGOK/Russia. This paper discusses some further possibilities for improvements of Direct reduction plants in order to increase the plant competitiveness and/or flexibility. Such plant improvements have been either already implemented in the latest projects for the first time o ... More
Presented by Mr. Robert MILLNER on 27 Sep 2018 at 11:20
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Blast furnace ironmaking
In 2008, after the Blast Furnace#1 shut down, was identified an abnormal phenomenon in its hearth which required great team effort for proper recovery of the refractory and resumption of operation. At the time, it was aimed to extend the campaign in five years. In this paper, it is described the general aspects of the equipment, the situation in his hearth, actions taken and the current hearth's c ... More
Presented by Mrs. BEATRIZ FAUSTA GANDRA on 25 Sep 2018 at 14:30
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Blast furnace ironmaking
HBIS GROUP Serbia Iron & Steel is integral Steel plant owned by the HBIS Group that in its composition has 2 Blast furnaces and 3 lines for sinter production. Usual ore burden of the blast furnace is: 35%sinter+62%pellets+3%B-scrap. During January and February 2016, test periods were performed at the Blast Furnace 1, where the ratio of the sinter was gradually reduced to final excluding. Each of ... More
Presented by Mr. Vladan ANDREJIC on 26 Sep 2018 at 14:50
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Blast furnace ironmaking
Blast furnace cohesive zone has a profound impact on the hot metal productivity and quality, fuel consumption, operation stability and lining life of the blast furnace. The high temperature properties of ferrous burden materials determine the configuration and location of the cohesive zone, and have therefore attracted increased attention. While numerous standard testing methods are in use to as ... More
Presented by Dr. Liming LU on 26 Sep 2018 at 13:50
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Blast furnace ironmaking
The present paper describes how the ferrous burden melts in a blast furnace and what consequences it has for blast furnace operation. For high PCI and high productivity operations, gas flow to and hence heat transfer from bosh gas to the solid/cohesive state of the ferrous burden is the rate limiting step in processing the ferrous burden, since the heat requirement of the direct reduction reaction ... More
Presented by Dr. Maarten GEERDES on 26 Sep 2018 at 09:20
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Blast furnace ironmaking
The present study was undertaken to find out whether or not there is an optimum distribution for nut coke and metallurgical coke over the ferrous layer and coke layer respectively. To this end a model for degradation of coke in the blast furnace was developed. It was verified with data from tuyere raking experiments. The tuyere raking result can be estimated based on degradation as a consequence o ... More
Presented by Dr. Maarten GEERDES on 25 Sep 2018 at 17:15
Type: Oral Presentation Session: Automation and digitalization in coke and ironmaking
Track: CO2 reduction and energy saving
Content ======= 1. Initial situation 2. New requirements lead to innovative analysis methods 3. Applicable applications for LIBS based smart process control 3.1 Applicable applications –LIBS on the feeding side 3.2 Applicable applications –LIBS in the melt shop 3.3 Applicable applications –LIBS in the milling, rolling and processing lines 3.4Applicable applications – LIBS ... More
Presented by Mr. Alexander SCHLEMMINGER on 26 Sep 2018 at 16:00
Type: Oral Presentation Session: Environmental control in coke and ironmaking
Track: Environmental control in coke and ironmaking
It is the increasing demand for an economic and cost saving operation mode that requires effective cooling in order to achieve low refractory wear and good furnace lifetime, which is making cooling technology an important aspect of furnace operation. In addition, the requirements for safety are getting more and more into focus. However, the use of water - today’s standard cooling medium - has ma ... More
Presented by Dr. Martina HANEL on 27 Sep 2018 at 13:20
Type: Oral Presentation Session: Modelling and simulation in coke and ironmaking
Track: Modelling and simulation in coke and ironmaking
Direct reduction and electric arc furnace are important routes for steel production in the world. The DRI production in 2016 was 72.8 Mt, from which 64.8% was by Midrex Process, 17.5% by coal-based, 17.4% by Hyl/Energiron and 0.3% by Other processes. The metallic charge of direct reduction is mainly composed by iron ore agglomerate in the form of pellets and the direct reduction of iron ore oc ... More
Presented by Mr. Michel LEITE on 27 Sep 2018 at 13:20
Type: Oral Presentation Session: Sintering
Track: Sintering
Iron and steelmaking industry is in demand to utilize ultra-fine iron ores due to changes in its availability and quality worldwide. Sintering plants are adapting to introduce higher ultra-fines percentage on their mixtures, raising concerns over the cold agglomeration step, critical to maintaining process stability and performance. Sintering bed permeability, granules mechanical properties and si ... More
Presented by Prof. Maurício BAGATINI on 25 Sep 2018 at 11:45
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Blast furnace ironmaking
Non-drainable trough repairs are inevitable in blast furnaces, limiting the drainage facilities. This issue became a bottleneck at G blast furnace leading to a reduction in the production levels. There are two drainable troughs at G Blast furnace with a campaign life of around 160ktons. Two types of repairs are carried out; minor repair after a life of 100ktons and major repair post the trough cam ... More
Presented by Mr. MAHESH AGARWAL on 27 Sep 2018 at 13:20
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Blast furnace ironmaking
The benefits of biomass usage as renewable energy source and reducing agent in the steel industry, particularly, by its injection into the blast furnace tuyeres is known. This contribution focuses on two aspects, which could increase the economic efficiency of this technology. The first one is related to the thermal treatment of biomass. Woody biomass waste and biomass residues were pyrolysed in a ... More
Presented by Dr. Alexander BABICH on 27 Sep 2018 at 11:20
Type: Poster Session: Postersession and Coffee Break
Track: Blast furnace ironmaking
In order to clarify the impact mechanism of CaO/SiO2 and MgO on the performance of Jiusteel blast furnace slag, based on the actual composition of Jiusteel blast furnace slag, the influences of CaO/SiO2 and MgO on viscosity and melting temperature of slags were investigated. Furthermore, the activity, liquidus temperature, liquid region and phase change of slag from 1600℃ to 1000℃ were calcula ... More
Presented by Jianliang ZHANG on 26 Sep 2018 at 15:14
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Blast furnace ironmaking
Silico-Ferrite of Calcium and Aluminum (multi-component CF) is one of main minerals in iron ore sinter. Multi-component CF is classified by columnar structure (SFCA) and acicular structure (SFCA-1), which have different crystal structures . It is considered that SFCA-1 has higher reducibility than SFCA, however, the results reported by previous studies have been included factors of adjacent struct ... More
Presented by Dr. Daisuke MARUOKA on 25 Sep 2018 at 16:35
Type: Oral Presentation Session: Sintering
Track: Sintering
Typically a large proportion of the ferrous burden charged to the ironmaking blast furnace is iron ore sinter. The quality of iron ore sinter has a strong influence on the productivity and fuel efficiency of the furnace, therefore high quality sinter is desirable. Individual pieces of sinter product from industrial sinter strands and sinter pot test are variable in composition and structure. This ... More
Presented by Mr. Tobin HARVEY on 25 Sep 2018 at 15:10
Type: Poster Session: Postersession and Coffee Break
Track: Poster
COREX process has obvious advantages in environment protection but still has some disadvantages, for example, the content of sulfur in hot metal is high and fluctuant severely. In the present work, the effects of the slag ratio, temperature of hot metal, binary basicity (R2) and the ratio of MgO/Al2O3 of the slag on the sulfur content in hot metal are investigated. Correlation analysis and regress ... More
Presented by Ms. Yanan LU, Prof. Shengli WU on 26 Sep 2018 at 15:25
Type: Poster Session: Postersession and Coffee Break
Track: Poster
The liquid phase fluidity of iron ore is one of the vital index of sintering characteristic, as the suitable melt fluidity can get a stronger bonding strength of sintered body. In this paper, FactSage thermodynamic calculation software and visible micro-sintering test device were conducted to research liquid phase fluidity and the main influence factors of melt formation characteristics. The resul ... More
Presented by Dr. Mingyin KOU on 26 Sep 2018 at 15:31
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Blast furnace ironmaking
Heating of blast has been and remains one of the most important parameters which determine the economic efficiency of blast furnace production. However, for several decades the maximum level of blast temperatures remains unchanged (1200-1250°C). This shows the limited capacity of conventional hot stoves with internal and external combustion chambers. The paper presents a new unique design of top ... More
Presented by Mr. Sergey IVLEV on 27 Sep 2018 at 11:20
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Blast furnace ironmaking
Many efforts have been made to investigate the softening-melting (SM) behaviour of ferrous burden material as it governs the formation of the cohesive zone (CZ) inside the ironmaking blast furnace (BF). Usually, the SM property of individual lump ore is thought to be inferior to iron ore sinter, however, it has been demonstrated that results for a mixed burden of ≈80% sinter and ≈20% lump ore ... More
Presented by Dr. Xinliang LIU, Prof. Tom HONEYANDS on 27 Sep 2018 at 10:40
Type: Oral Presentation Session: CO2 reduction and energy saving
Track: CO2 reduction and energy saving
The iron & steel-work off-gases e.g. blast furnace gas(BFG), basic oxygen furnace gas(BOFG) and coke oven gas(COG) are generally used for heat or power generation, but the efficiency of gases utilization is low. A total solution using PU-1 molecuar sieve and vacuum pressure swing adsorption(VPSA) process, gains the carbon monoxide(CO) gas economically which purity can be more than 99%vol., let it ... More
Presented by Mr. YANKUI LI on 25 Sep 2018 at 16:55
Type: Oral Presentation Session: Sintering
Track: Sintering
With the rapid change in iron ore supplies and composition, steel mills now have to adjust the composition of the ore mixture to the sinter plant more frequently than ever before. Hence, different scales of test methods have been developed to help sinter plants evaluate new ore types and ore blends in order to optimise their ore mixtures and reduce raw material costs. However, iron ore sintering i ... More
Presented by Dr. Liming LU on 26 Sep 2018 at 11:30
Type: Oral Presentation Session: Sintering
Track: Sintering
The increment in the impurities of iron ore such as Al2O3 lowers the reducibility of iron ore sinter and increases the gas permeability resistance in a blast furnace. In order to overcome the problems, MgO is often added into sinter by blending dolomite and/or serpentine as a constituent of raw materials of sinters. The role of MgO in sinter at the lower part of a blast furnace depends on the MgO ... More
Presented by Dr. Miyuki HAYASHI on 26 Sep 2018 at 10:00
Type: Oral Presentation Session: Sintering
Track: Sintering
Tata Steel Kalinganagar is a green field 3MTPA integrated steel plant operating via the BF-BOF route. The sinter plant at Tata Steel Kalinganagar was commissioned in January 2016. The sintering machine area is 496m2 with state-of-the-art cooler design and advanced high intensity mixing-granulation systems. Among the challenges faced in the ramp up, two key issues that were of major concern in the ... More
Presented by Mr. ARUNKUMAR CHELLADURAI, Mr. SRINIVASA REDDY ASADI on 25 Sep 2018 at 10:45
Type: Oral Presentation Session: Direct reduction
Track: Direct reduction
CO-H<sub>2</sub> mixture gas is often used for gas-based DRI process where carbon deposition reaction and Fe<sub>3</sub>C metal dusting play serious roles for a stable reduction operation. Fe<sub>3</sub>C decomposition leads to the formation of iron particles which is a catalyst for carbon fiber deposition. Because of the parallel occurrence of these reactions, kinetic analysis of them would be co ... More
Presented by Mr. Kazuto NISHIHIRO on 27 Sep 2018 at 09:10
Type: Poster Session: Postersession and Coffee Break
Track: Poster
Flash ironmaking is a new smelting reduction process. The extent of molten iron carburization is close to saturation in the blast furnace process. However, the extent of carburization in a flash ironmaking process is unexpected because there is no compression of solid charge and no carburization reactions occurred between the deadman bottom and hot metal. To this end, iron powder reduced and chemi ... More
Presented by Dr. Wei ZHANG on 26 Sep 2018 at 15:36
Type: Oral Presentation Session: Direct reduction
Track: Direct reduction
This article presents a novel experimental procedure that simulates the complicated counter-current DR shaft process. This lab test is recently developed in ArcelorMittal Global R&D and shows good correlation with actual direct reduction process. The method provides a unique tool to study the impact of DR plant operation parameters in the laboratory scale, and enables the study of raw materials ev ... More
Presented by Mr. Mahdi FARAHANI on 27 Sep 2018 at 08:50
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Iron ore production and handling
Since LKAB decided to invest in a pilot scale blast furnace in 1996, the equipment has over the years produced a significant amount of data and results for improvement of products and processes within ironmaking. The experimental blast furnace has played a vital role in many research projects, producing important results which simplify the decisions whether to move into larger scale or continue de ... More
Presented by Johanna ALATALO on 25 Sep 2018 at 16:15
Type: Oral Presentation Session: CO2 reduction and energy saving
Track: CO2 reduction and energy saving
Recently, reduction of CO<sub>2</sub> emission and also energy conservation in ironmaking process are serious concerns which persuaded the researchers to look for a cleaner and a more efficient method for iron production. Microwave heating has been considered as a new heating method for iron ore reduction which could decrease the required carbonaceous materials for iron production. However, it wou ... More
Presented by Mr. Ahmadreza AMINI on 25 Sep 2018 at 11:25
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Smelting reduction
**Abstract:** The content of Al2O3 in iron ore is of negative effects on sintering process, metallurgical properties of sinter and smelting of BF, which has a serious influence on the quality of molten iron. So it is very important to study the activity of Al2O3 in metallurgical slag to grasp and control the influence of content of Al2O3 on the quality of molten iron. In this paper, several measur ... More
Presented by Prof. Fengman SHEN on 26 Sep 2018 at 10:50
Type: Oral Presentation Session: Cokemaking
Track: Cokemaking
Furnace coke was experimental heated between 850°C and 1100°C by varying the gas composition and the alkali content of the raw coke. Raman spectroscopy (Iterative Fitting of Raman Spectra) evaluates the microstructural change of coke during the experiments. The obtained results indicate a significant microstructural variation within a bulk sample. This variation controls significantly the coke q ... More
Presented by Mr. Anrin BHATTACHARYYA on 25 Sep 2018 at 15:10
Type: Oral Presentation Session: Environmental control in coke and ironmaking
Track: Environmental control in coke and ironmaking
Nantong coal (NTC) and Laigang coal (LGC), the two typical high-sulfur coking coal in China, were investigated on their desulfurization processes with the addition of NaOH-H2O2 under microwave treatment. X-ray diffraction (XRD), inductively coupled plasma (ICP) and fourier transform infrared (FT-IR) were performed to unravel the migration of organic sulfur in the two coal. In addition, the constit ... More
Presented by Mr. Yue WU on 27 Sep 2018 at 14:00
Type: Poster Session: Postersession and Coffee Break
Track: Poster
Blast furnace emission reduction optimization model is based on substance conservation and energy conservation of ironmaking process. The mathematical model is established using the multiple-objective optimization method with the cost and CO2 emission taken as objective functions. The optimization variables and constraints are determined by the characteristics of blast furnace ironmaking process a ... More
Presented by Mr. Shun YAO, Dr. Mingyin KOU on 26 Sep 2018 at 15:13
Type: Oral Presentation Session: Modelling and simulation in coke and ironmaking
Track: Modelling and simulation in coke and ironmaking
Any expert system of blast furnace should include the following models: the model to estimate material and gas distribution and their temperatures at the furnace top based on measurements by radioisotope profile scanner (or other type) and industrial IR-camera; conditions and dimensions of the furnace raceway; slag model which allow estimate the viscosity of primary, intermediate and final slags o ... More
Presented by Dr. Yakov GORDON on 27 Sep 2018 at 11:00
Type: Oral Presentation Session: Keynote
Track: Keynote
The self-reducing phenomena has been explored with the aim of improving the reducing velocity of agglomerates during hot metal production. The inner phenomena taking place in the agglomerates, however, are still controversial and further studies are demanded. In this paper we proposed a detailed mechanism taking place within the agglomerates during the solid-gas self-reducing step. In order to stu ... More
Presented by Prof. Jose Adilson CASTRO on 25 Sep 2018 at 13:50
Type: Oral Presentation Session: Modelling and simulation in coke and ironmaking
Track: Modelling and simulation in coke and ironmaking
The campaign length of a blast furnace is limited by the hearth inner lining lifetime. In order to maximize the campaign length and ensure a good draining of hot metal and slag, a good understanding of the flow in the hearth is essential. Challenges in modeling the flow involve several continuous phases (hot metal, slag and hot blast) as well as the presence of the deadman, a dense bed of coke par ... More
Presented by Mr. Mathias VÅNGÖ on 27 Sep 2018 at 09:30
Type: Oral Presentation Session: Cokemaking
Track: Cokemaking
Reasonable selection of coal brands and blending them for preparing raw material of coke are important to achieve the effective utilization of caking coal and enhancement of coke strength. Coal compatibility, namely “blending effect” has long been an unresolved problem. The effect is deviation between actual strength of coke made from coal blend and estimated strength which is calculated by av ... More
Presented by Mr. Daisuke IGAWA on 25 Sep 2018 at 16:55
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Blast furnace ironmaking
Copper stave failure is a major cause for interim blast furnace repairs, at great cost to the blast furnace owner, primarily due to: a) abrasive wear on the exposed hot-face; b) cracking of welded pipe connections; and c) low cooling density resulting from ineffective cooling layout. Under these damaging conditions, traditional staves often begin to leak water, overheat and exhibit cascading wear ... More
Presented by Mr. DUSTIN VICKRESS on 27 Sep 2018 at 08:50
Type: Oral Presentation Session: Environmental control in coke and ironmaking
Track: Environmental control in coke and ironmaking
The demand for increasing energy efficiency is one of the global megatrends of our time. Although the steel industry suffers from a volatile economic environment, steel plant operators are interested to find opportunities for sustainable cost reduction. Steel mills are trying to cut electrical power and energy costs as these are among the biggest cost factors that can be influenced. The product c ... More
Presented by Mr. Andreas STEINWANDTER on 27 Sep 2018 at 13:00
Type: Oral Presentation Session: Cokemaking
Track: Cokemaking
Evaluation of coking coal properties in coking Industry depends on several independent indicators tested in different test conditions for a long time, for example, Gieseler fluidity, Arnu-Audibert's dilatometer, plastometer indice, Roga index, and volatile content. On the other hand, evaluation of coke thermal properties depends on Coke Reactive Index (CRI) and Coke Strength after Reaction (CSR) t ... More
Presented by Prof. Jing LI on 25 Sep 2018 at 14:50
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Blast furnace ironmaking
A large quantity of return fines recycling is a serious shortage of current sinter + BF ironmaking process, which causes big increases in sintering operation cost and pollutant emissions. No Return Fine (BF) Ironmaking Process (NRIP) is conceived to use return fines in BF directly, after removing minus 1 mm part of dust from it. NRIP could make sinter+BF ironmaking process more efficient and envir ... More
Presented by Prof. Yongzhi SHA on 27 Sep 2018 at 12:40
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Smelting reduction
In the current work, the reduction route of CaO·Fe2O3 (CF) was investigated and the comparison of CF and Fe2O3 (H) on their reduction kinetics was made. Non-isothermal reduction experiments of powdery CF and H heating up to 1123K with a rate of 10K·min−1 in a continuous stream of 30% CO and 70% N2 were conducted through thermo-gravimetric analysis. It found that the reduction processes of CF a ... More
Presented by Mr. Gang LI on 26 Sep 2018 at 11:30
Type: Oral Presentation Session: Sintering
Track: Sintering
Thick bed technique has been widely used in the sintering plants , because it can save fuel consumption and achieve significant economic benefits. However, when the sintering bed height further increases, the cross-section shape would vary with respect to the nclination angle, and directly affect heat transfer inside sintering bed afterwards. After a two-dimensions(2D) mathematical model is establ ... More
Presented by Mr. Chengfeng SUN on 25 Sep 2018 at 14:50
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Iron ore production and handling
Modern blast furnace with long campaign life will install copper stave as its cooling element in bosh, belly and low shaft area. However, copper is not a good material for wear-resistance and deformation-resistance. The wears caused by burden material or high heat load damage make the stave thinning and leakage. Therefore, blast furnace with copper stave has to focus on its thickness. This study d ... More
Presented by Mr. Yung Chang KO on 27 Sep 2018 at 11:00
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Blast furnace ironmaking
The chute shape determines the particle trajectory on and leaving the chute, and further affects the burden distribution in blast furnace. Therefore, a three dimensional model of the upper part of serial type bell-less top blast furnace is established based on discrete element method. The effects of chute shape and chute angle on the burden distribution on the chute and at the throat of blast furn ... More
Presented by Dr. Mingyin KOU on 26 Sep 2018 at 13:30
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Sintering
Advanced Softening and Melting (ASAM) experiments were performed with mixed sinter-pellet burdens of contrasting compositions, showing large differences in vertical contraction and pressure-drop curves (vs T, time). To understand the mechanisms behind these differences, experiments were interrupted at key stages of the simulated BF trajectory for detailed petrological investigation. Combining mult ... More
Presented by Dr. James SMALL on 26 Sep 2018 at 11:50
Type: Oral Presentation Session: Pelletising
Track: Pelletising
New Zealand ironsand is an unconventional titaniferous ore (typically ~8% TiO2 by mass) which is commercially utilised to produce DRI, and as a blending component within BF sinters. Oxidative sintering of this titanomagnetite sand enables high-strength porous pellets to be formed, and such pre-oxidation is known to significantly enhance the gas-solid reduction rate compared to unoxidised ironsand. ... More
Presented by Mr. Oscar BJAREBORN on 26 Sep 2018 at 13:50
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Blast furnace ironmaking
Blast furnace productivity is limited by the resistance offered to the gas flow in the cohesive zone. Mixed use of nut coke with iron ore proved beneficial for decreasing this resistance. In present study effect of nut coke addition on the olivine iron ore pellet bed was studied under simulated blast furnace condition. Nut coke mixing degree (replacement of regular coke) varied from 0 to 40 wt% to ... More
Presented by Mr. Dharm Jeet GAVEL on 26 Sep 2018 at 16:40
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Blast furnace ironmaking
Hot blast superheating using a hot mixer equipped with plasma torches promises to reduce the blast furnace coke consumption and carbon footprint while increasing blast furnace productivity. Countermeasures to keep the hot blast refractory below its service temperature limit were developed using computational fluid dynamic (CFD) modeling and evaluated at the pilot plant scale. The operation of th ... More
Presented by Mr. Ian CAMERON, Dr. Mitren SUKHRAM on 25 Sep 2018 at 15:30
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Blast furnace ironmaking
Pulverized Coal Injection (PCI) into the Blast Furnace (BF) is well-known process for cost saving of the BF. Most of the ironmaking companies are trying to enhance the amount of Pulverized Coal Ratio (PCR) for the purpose of cost reduction. Two key factors, flowability and combustibility, of pulverized coal should be estimated to achieve higher PCR under stable operation condition. The flowability ... More
Presented by Mr. DONGMYUNG SEO on 27 Sep 2018 at 13:20
Type: Oral Presentation Session: Modelling and simulation in coke and ironmaking
Track: Modelling and simulation in coke and ironmaking
In a modern blast furnace (BF) operation, the hearth is a critical area influencing both the routine casting performance and campaign life, where the liquid flow distribution, coke bed structure and condition, and the in-service refractory profile are all contributing factors. However, direct measurement is nearly impossible because of the high temperature conditions in the hearth. In practice, th ... More
Presented by Dr. xuefeng DONG on 27 Sep 2018 at 09:10
Type: Oral Presentation Session: Smelting reduction
Track: Direct reduction
HIsarna is an emerging and promising alternative ironmaking process. Smelting cyclone is used to melt and pre-reduce fine and un-agglomerated iron ore particles in HIsarna reactor. Fine ore and flux are injected in the smelting cyclone together with oxygen. The injected ore is intensely mixed with rising hot reducing gases, undergoes partial reduction and melting. The melt hits the water-cooled si ... More
Presented by Dr. Zhiyuan CHEN on 26 Sep 2018 at 11:30
Type: Poster Session: Postersession and Coffee Break
Track: Poster
ZnO/activated semi-coke desulfurizer was synthesized using hydrothermal method. The obtained samples were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and N2 adsorption. The effects of the loading amounts of ZnO, reaction time and temperature on the performance of ZnO/activated semi-coke’s desulfurization capability were investigated in a fi ... More
Presented by Mrs. Rong li SANG on 26 Sep 2018 at 15:12
Type: Oral Presentation Session: Keynote
Track: Blast furnace ironmaking
During last few years, iron production in China was kept at about 700 million tons annually, which was totally produced from BF process. At same time, a lot of mini BFs have been eliminated, and many big BFs have been built up and put into operation. There are 23 BFs with inner volume equal or over 4000m3. Both sinter machines and pellet facilities have been enlarged and upgraded correspondingly. ... More
Presented by Prof. Tianjun YANG on 25 Sep 2018 at 13:30
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Blast furnace ironmaking
Blast furnace taphole clays can be extremely sophisticated refractory products. The correct selection is affected by several blast furnace operating factors. The complexity of these formulations mirrors the multitude of often conflicting properties and characteristics that are demanded from the modern day taphole clay, e.g. refractory properties, plasticity, erosion stability and the suitability t ... More
Presented by Dr. Ansgar SCHEPERS on 27 Sep 2018 at 13:40
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Blast furnace ironmaking
Pulverized coal injection is a commonly used practice in modern blast furnace operation. To further increase the PCI rate, a detailed understanding of gasification kinetics behavior of injected coal in tuyere and characteristics of combustion residues is critical. Using the PCI injection simulation rig at CanmetENERGY, the combustion behavior of selected typical PCI coals was examined. The combust ... More
Presented by Mr. Ka Wing NG on 27 Sep 2018 at 12:40
Type: Oral Presentation Session: Sintering
Track: Sintering
The wetting behavior of calcium ferrite (CF) slag on TiO2 substrate at 1523K was investigated using an improved sessile drop method. The initial apparent contact angle was 30°-50°, and the final apparent contact angle was less than 20°. The CF-TiO2 system is reactive wetting system, and the wetting process was divided into four stages. Stage I: physical spreading; stage II: reaction at the inte ... More
Presented by Mr. Mingrui YANG on 25 Sep 2018 at 16:35
Type: Oral Presentation Session: Automation and digitalization in coke and ironmaking
Track: Automation and digitalization in coke and ironmaking
During mining, beneficiation and processing stages in production it’s necessary to know chemistry of materials in real-time for optimal process control and improve final product quality. Using online information about chemistry it’s possible correct distribute iron ore and concentrate between stockpiles, optimal dosage fluxes and coke for stabilize sinter basicity before it is too late for a ... More
Presented by Mr. Alexander BARYSHNIKOV on 26 Sep 2018 at 14:50
Type: Oral Presentation Session: Sintering
Track: Blast furnace ironmaking
For raising sinter productivity and quality while reducing energy consumption and raw material cost, a new blending method has been created in Ansteel to optimise sintering blends. Traditionally the granulation of sintering blends in Ansteel has been adopted in disc pelletisers, which was recently found to be one of the causes to unstable blast furnace operation due to their low mixing efficiency. ... More
Presented by Mr. Mingshun ZHOU on 26 Sep 2018 at 13:30
Type: Oral Presentation Session: Keynote
Track: Keynote
The last decade was a turbulent for the steel industry. The reorganization of steel industry across borders has progressed and the increased demand for steel products has made the price of raw materials such as iron ore and metallurgical coal more volatile than ever. Ironmaking technology division in NSSMC has been exposed to global competition and has tried to cope with these changes and to incre ... More
Presented by Dr. Koji SAITO on 25 Sep 2018 at 09:35
Type: Oral Presentation Session: Recycling of in-plant residues
Track: Recycling of in-plant residues
Ore-based steelmaking generates a variety of residues including dusts, sludges, scales and slags. Recycling of these residues within the process or via other applications is essential for sustainable production from both environmental and economic aspects. In blast furnace (BF) ironmaking, the gas-cleaning equipment recovers the particles in the off-gas as BF dust and sludge. Traditionally, the dr ... More
Presented by Mr. Anton ANDERSSON on 26 Sep 2018 at 14:10
Type: Oral Presentation Session: Environmental control in coke and ironmaking
Track: Environmental control in coke and ironmaking
The majority of existing blast furnaces plants use a dustcatcher as the primary process for removal of the process dust from the top gas. In recent years, there has been a trend to replace the dustcatcher with a cyclone: increasing the efficiency of dust removal, increasing the dry dust recycle to (for example) the sinter plant, and reducing the sludge volume generated from wet gas cleaning. This ... More
Presented by Mr. Robert MAWER on 27 Sep 2018 at 12:40
Type: Oral Presentation Session: Pelletising
Track: Pelletising
Canadian hematite acid pellet with low magnetite content fluxed and olivine were isothermally reduced with hydrogen and carbon monoxide at 600 to 1000℃. The course of reduction was investigated by measuring the oxygen weight loss as a function of time using a thermogravimetric analysis. Macroscopic and microscopic examination, X-ray and carbon analyses were also used to elucidate the mechanisms ... More
Presented by Prof. yaowei YU on 26 Sep 2018 at 16:00
Type: Oral Presentation Session: Direct reduction
Track: Direct reduction
Ironsand is a potential cheap source of iron with possible other values such as titania and vanadium oxide. Direct reduction is regarded as one of the promising processes to deal with ironsand in both an economically and environmentally sustainable manner. In this study, the reduction characteristics of pelletised ironsand ore by hydrogen gas were investigated. The pelletising and sintering of the ... More
Presented by Mr. Ao ZHANG on 27 Sep 2018 at 09:30
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Blast furnace ironmaking
Changes in heat transfer regularities of blast furnace process in course of this process refinement are considered and evaluated. It is shown that stable and profitable operation of modern intensive blast furnace process with variety of raw materials, combined blast etc. could be achieved only preserving two distinct zones of high intensive heat transfer. Any changes in melting process do not chan ... More
Presented by Prof. Nikolai SPIRIN on 26 Sep 2018 at 09:20
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Blast furnace ironmaking
The influence of the melting intensity, which is defined and estimated as a specific blast-furnace productivity, on the stability of blast furnace operation and conditions of indirect reduction of wustite is evaluated and studied. It is shown that at elevated melting intensity -specific productivity the incremental change in the melting intensity leads to a more modest variation in the efficiency ... More
Presented by Dr. Yakov GORDON on 26 Sep 2018 at 10:00
Type: Oral Presentation Session: CO2 reduction and energy saving
Track: CO2 reduction and energy saving
Within the integrated steel plant, the blast furnace BF is the most energy intensive process with significant amount of CO2 emission. Switching of fossil fuels to biomass offers an alternative for the natural resources reservation and climate change mitigation. In recent years, lots of efforts have been putting on developing biomass for BF’s utilization, especially in regions with abundant fores ... More
Presented by Prof. Chuan WANG on 25 Sep 2018 at 15:10
Type: Oral Presentation Session: Pelletising
Track: Pelletising
Basic characteristics of forsterite were systematically studied by chemical analysis, XRD, SEM-EDS. A series of experiments were performed to investigate the effect of forsterite fineness on pellets strength and porosity by changing pre-grinding time of olivine. It could be found that prolong the pre-treatment time of forsterite is beneficial to the promotion of pellets strength; there are two kin ... More
Presented by Prof. Jianliang ZHANG on 26 Sep 2018 at 14:30
Type: Poster Session: Postersession and Coffee Break
Track: Poster
The blowpipe of blast furnace (BF) air supply apparatus is always the weakest link of the hot blast pipe system. The local air leak, high surface temperature and short service life of blowpipe were ubiquity in the air supply apparatus after being used for a period of time. The average service life of No.2 BF tuyere blowpipe with conventional liner in Shouqin Company was 250 days at the initial sta ... More
Presented by Mr. Li ZHU, Dr. Wenlong ZHAN on 26 Sep 2018 at 15:33
Type: Oral Presentation Session: Direct reduction
Track: Direct reduction
Abstract An existing scheme of vanadium production from low-titanium magnetite concentrates is energy-consuming and associated with loss of valuable elements, e.g. titanium. The present work investigates the possibility of obtaining products, which are different from the processing using the conventional technological scheme, for further development of an energy-efficient and wasteless technology ... More
Presented by Dr. Yury KAPELYUSHIN on 27 Sep 2018 at 08:30
Type: Oral Presentation Session: Automation and digitalization in coke and ironmaking
Track: Automation and digitalization in coke and ironmaking
Efficiency, Productivity, Reliability in conjunction with Big Data analysis are key requirements to secure a competitive position in the steel industry. It all starts with the collection of data provided by sensing elements in the measurement points. Durability, repeatability and long-term stability beats oversophisticated and overpriced measurement solutions. Reliable and interconnected-sensing / ... More
Presented by IVICA NUJIC on 26 Sep 2018 at 16:20
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Blast furnace ironmaking
Abstract: The paper presents a brief introduction about the significant work conducted with a scale of physical bell-less burden model for falling curves and burden distribution at any given chute angles. An incidence formula between flow control gate (FCG) and burden flow was established by the actual measurement of charging. The measurement of falling curves using laser trajectory probe at given ... More
Presented by Mr. Yuman CHE on 25 Sep 2018 at 16:55
Type: Poster Session: Postersession and Coffee Break
Track: Modelling and simulation in coke and ironmaking
The state of blast furnace (BF) campaign life and the erosion mechanism of BF hearth and bottom are summarized. According to the design and erosion conditions of hearth and bottom of a blast furnace with effective volume of 3200m3, a two-dimensional mathematical model was developed using the theory of heat transfer with ANSYS to monitor the erosion state of blast furnace’s hearth and bottom. The ... More
Presented by Prof. Jing LI on 26 Sep 2018 at 15:24
Type: Oral Presentation Session: Modelling and simulation in coke and ironmaking
Track: Modelling and simulation in coke and ironmaking
To achieve a stable and efficient blast furnace operation it is important to have a controlled gas flow inside the furnace with a proper burden distribution, thus a strict control of the particulate material size distribution inside the charge is required to avoid generation of preferential paths of the gas molecules through the burden. This work uses Discrete Element Method (DEM) to simulate raw ... More
Presented by Dr. Rodrigo MAGALHÃES DE CARVALHO on 27 Sep 2018 at 11:20
Type: Oral Presentation Session: Modelling and simulation in coke and ironmaking
Track: Modelling and simulation in coke and ironmaking
Combustion processes of heating gas for 7.63m coke oven in Shougang were simulated by the adoption of CFD modeling. Through calculation and analysis, the following conclusions were obtained: (1) As the heating gas flow rate decreased, the average velocity of gas inside the combustion chamber was reduced; (2)When the gas flow rate in the vertical flue was reduced by 5m3/h, the average temperature i ... More
Presented by Mr. Chao MA on 27 Sep 2018 at 13:00
Type: Poster Session: Postersession and Coffee Break
Track: Poster
The process of spraying steam on surface of sintering bed was studied by using Fluent in this paper. The model was simplified into 2D and only front part of sinter machine was studied. As simulation results show that : (1) average temperature of sintering bed raised 20.3℃ and temperature of off-gas raised 35.42℃ after spraying steam; (2) the CO in off-gas became lower and CO2 in off-gas gettin ... More
Presented by Dr. jiliang ZHOU on 26 Sep 2018 at 15:34
Type: Oral Presentation Session: Modelling and simulation in coke and ironmaking
Track: Modelling and simulation in coke and ironmaking
The blast furnace iron making is the main method to produce liquid iron. A blast furnace is charged with ore and coke from the top along with a preheated gas introduced to the furnace through the tuyeres in the lower part. The combustion of coke generates reducing gas ascending through the blast furnace to reduce iron-bearing materials. The reduced iron-bearing particles start softening and me ... More
Presented by Mehdi BANIASADI on 27 Sep 2018 at 10:20
Type: Oral Presentation Session: Smelting reduction
Track: Smelting reduction
Direct reduction degree in COREX affects the reducing gas component and effective heat utilization rate. The present work systematically studies the influence of direct reduction degree on these characteristics in COREX through a static model. The model is developed based on mass and heat balances, which can calculate the consumption of iron ores, coal, fluxes, the volume and composition of the sl ... More
Presented by Dr. Heng ZHOU on 26 Sep 2018 at 09:40
Type: Oral Presentation Session: CO2 reduction and energy saving
Track: CO2 reduction and energy saving
The iron and steel industry is a source of industrial CO2 emissions. The BF-BOF route of iron and steel making is considered as the most successful and economic route, hence widely employed for the iron and steel production. To comply with the targets set by the latest “conference of the parties” (COP) for climate change significant additional effort is required to achieve the target CO2 emiss ... More
Presented by Mr. Anand Kumar AGRAWAL on 25 Sep 2018 at 14:30
Type: Oral Presentation Session: Modelling and simulation in coke and ironmaking
Track: Modelling and simulation in coke and ironmaking
Iron and steel making requires a wide range of different raw materials significantly influencing process performance which demands a continuous optimization of process routes also with respect to energy efficiency as well as environmental emissions. Steadily changing raw material prices and qualities, market situations and product variations are challenging integrated steel plant operators in prod ... More
Presented by Dr. Bernd WEISS on 27 Sep 2018 at 12:40
Type: Oral Presentation Session: Cokemaking
Track: Cokemaking
Tribological and scratch testing techniques were applied to metallurgical coke samples to determine (1) the abrasive strengths of the coke microtextural constituents, and (2) the strength of the interfaces between the inertinite maceral derived components (IMDC) and the reactive maceral derived components (RMDC), as a function of the properties of the parent coal(s). These parameters were quantifi ... More
Presented by Lauren NORTH on 25 Sep 2018 at 11:05
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Blast furnace ironmaking
Coke, the main fuel of the blast furnace (BF) process, undergoes significant structural changes both in the macro- and microstructural level during its descend through the BF. To investigate some of these properties of coke, samples have been taken by drilling through one of the tuyeres on an actual BF. The aggregate mass has been processed to separate the coke pieces from it. These samples have ... More
Presented by Dr. Anrin BHATTACHARYYA on 25 Sep 2018 at 11:05
Type: Poster Session: Postersession and Coffee Break
Track: Poster
Laboratory test of removal of titanium from hot metalis developed in different remover, different proportion and different granularity.The suitable remover and parameters for industrial production test are found. At the same time the removable titanium removal device is designed and developed. Industrial test of removal of titanium from hot metalin blast furnace of Shou-gang stock company is devel ... More
Presented by Dr. Xuesong ZHANG on 26 Sep 2018 at 15:18
Type: Poster Session: Postersession and Coffee Break
Track: Poster
The flue gas circulation sintering process can not only realize the comprehensive utilization of resources, but also can realize clean production which by recycling sintering flue gas to conduct iron ore sintering and significantly reducing the flue gas processing in the terminal treatment. The flue gas directly recycling use in sinter production will affect the sinter properties, because the flue ... More
Presented by Dr. Chao LIU on 26 Sep 2018 at 15:16
Type: Oral Presentation Session: Direct reduction
Track: Direct reduction
Compared to the traditional Blast Furnace – Basic Oxygen Furnace way of producing steel, more than 50% of CO2 emissions can saved if steel is produced by means of the Energiron Direct Reduction – Electric Arc Furnace way. This target is achieved partly thanks to the use of reducing sources cleaner than coal, and partly thanks to the selective capture of up to 90% of the CO2 produced, that can ... More
Presented by Dario PAULUZZI on 27 Sep 2018 at 10:40
Type: Oral Presentation Session: Smelting reduction
Track: Smelting reduction
The only HIsmelt process in the world was moved from Kwinana, Australia to Shandong, China in 2013 and all the related copyright has also been transferred from Rio Tinto to a Chinese company in 2017. The Shandong HIsmelt plant was put into operation in June, 2016 and it has achieved 70-day continuous operation with the highest daily production being 1876 t/d. This is the first time to achieve cont ... More
Presented by Prof. Kejiang LI on 26 Sep 2018 at 11:10
Type: Oral Presentation Session: CO2 reduction and energy saving
Track: CO2 reduction and energy saving
Substitution of pulverized coal injection by solid biocarbon fuel has the potential to achieve substantial reduction in GHG emissions from blast furnace ironmaking. A techno-economic model was developed to evaluate the value-in-use of solid biocarbon to facilitate the selection of solid biocarbon for replacement of pulverized coal injection. The value-in-use of solid biocarbon is strongly influenc ... More
Presented by Mr. Ka Wing NG on 25 Sep 2018 at 15:30
Type: Poster Session: Postersession and Coffee Break
Track: Poster
According to the comparative analysis of different blast furnace slag granulation methods and water-slag separation processes, we have combined the granulation tank, the innovative filtration process and the heat recovery together to ensure the slag granulation production reliable, energy-saving, environmental friendly, practical, economic and efficient. By the analysis of using grab crane to take ... More
Presented by Mr. Fan ZHOU on 26 Sep 2018 at 15:10
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Blast furnace ironmaking
Abstract: No.8 blast furnace (3200m3) of HanSteel is equipped with an online laser detector of burden surface profile. During the furnace running, images of burden surfacecan be obtained with laser scanning.All data and curves of theburden profile are processed bycomputer to provide real-time BF information for operators. This system can be used to detect burden surface profile and helpimprovingBF ... More
Presented by Prof. Zhengkai GAO on 26 Sep 2018 at 14:10
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Blast furnace ironmaking
Abstract: After the 5800m3 blast furnace was put into operation in 2009, The Thermal Camerastarted observing the burden surface and gasflow conditionsin the furnace. BFThermal Camerawithhigh resolution chip was upgraded in 2017. Much clear image of the burden surface and gasflow conditions were obtained.Operators can understand very wellthe situation inside the vessel all the time. Anotherdedicate ... More
Presented by Prof. Zhengkai GAO on 26 Sep 2018 at 09:00
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Blast furnace ironmaking
The damage of copper cooling stave in several china’s blast furnace is investigated. Furthermore, the damage mechanism has also been analyzed. It’s shows that the breakage of copper cooling stave mainly due to unstable slag skull and frequent wearing by furnace burden and gas flow, as well as improper design. Based on which some measures were suggested for prolonging the service life of copper ... More
Presented by Mr. Man Xiang ZHAO on 27 Sep 2018 at 10:40
Type: Poster Session: Postersession and Coffee Break
Track: Poster
Abstract: In order to effectively use of low rank coal and biomass, the co-liquefied product was extracted from two kinds of low-rank coals and biomass by N-2-methyl-2-purrolidinone(NMP) at high temperature and high pressure. The structures of the co-liquefied product and residues were characterized by element analysis, FT-IR spectra. The effects of temperatures, coal rank, solid-liquid ratio and ... More
Presented by Prof. Haibin ZUO on 26 Sep 2018 at 15:22
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Blast furnace ironmaking
In sinter plants, at the end of the sintering process the product is subjected to high performance screens of 20 mm, 10 mm and 5 mm respectively. This allows part of the middle size fraction to be utilized as a hearth layer in sinter strands. Normally, the screened product is then remixed to be sent to the blast furnace plant, where it is charged into the furnace. In contrast, if the screened mate ... More
Presented by Gilles KAAS on 26 Sep 2018 at 10:00
Type: Oral Presentation Session: Sintering
Track: Sintering
Flow and Occurrence of Magnesium in Sintered Products were studied by XRF and SEM-EDS. The results of this research are as follows. The figure shows magnesium content of sintered products in the following decreasing order: blast furnace return fine, sinter return fines, finished ore. Moreover, magnesium content in the 0.5mm-3.15mm size of blast furnace return fine is especially high. Magnesium con ... More
Presented by Mr. Weili ZHANG on 25 Sep 2018 at 16:55
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Iron ore production and handling
Abstract: The unburned pulverized coal in the blast furnace has an effect on the slag properties, which affects the quality of the hot metal. The effect of unburned pulverized coal made from Yongcheng anthracite on slag viscosity is studied by means of high temperature melt physical characteristics synthetic test instrument, and the reason of slag viscosity change was illuminated by observing slag ... More
Presented by Prof. Xin JIANG on 27 Sep 2018 at 10:20
Type: Oral Presentation Session: Recycling of in-plant residues
Track: Recycling of in-plant residues
Abstract: In this paper, on the basis of system of CDQ dust block test, thermal insulation performance test of CDQ dust in laboratory and industrial application is studied, the performance of CDQ dust as thermal insulation agent of molten iron and impact of [S] in iron is comprehensive analyzed, and on the performance of CDQ dust, carbonized rice husk and composite preservation agent etc is compar ... More
Presented by Mr. yuman CHE on 26 Sep 2018 at 16:00
Type: Poster Session: Postersession and Coffee Break
Track: Cokemaking
Brazil has a large coal reserve, which is mainly located in the Parana Basin, southern region of the country. Despite that, the steel sector, which is the largest coal consumer in Brazil, needs to import 100% of its demand. The coal from Barro Branco seam in Santa Catarina-Brazil is a potential raw material for coke production due to its well-known coking properties. Thus, the present study aimed ... More
Presented by Mr. Bruno FLORES on 26 Sep 2018 at 15:19
Type: Oral Presentation Session: Cokemaking
Track: Cokemaking
JFE Fukuyama No.5 D battery, since this battery started up, we struggle to control the temperatures of center flues and they fall to a low level. We estimated that the amount of air flow in center flues is less than gas flow because of the oven structure. Then, we entertained the way to increase air flow and invented the way we insert air with C ports which are used in only C gas inflammation. In ... More
Presented by Mr. Norimasa IKEDA on 25 Sep 2018 at 15:30
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Blast furnace ironmaking
> Primarily used in the high heat zones of the furnace the copper stave has proved to be a hugely popular choice for blast furnace cooling. Despite its many successes, some plants have suffered with copper stave problems in two particular areas: stave bending (leading to water leaks at back of the stave) and stave wear (erosion on the hot face). The root causes of these failures can be defined by ... More
Presented by Mr. David OSBORNE on 27 Sep 2018 at 09:10
Type: Poster Session: Postersession and Coffee Break
Track: Blast furnace ironmaking
In order to evaluate the performance of UCAR carbon brick in blast furnace, the production technology characteristics and the application of UCAR carbon brick in blast furnace were analyzed. Analytic hierarchy process was used to calculate the weight of the performance index for carbon brick, the erosion resistance of carbon brick in molten iron was considered as the key performance. The erosion r ... More
Presented by Kexin JIAO on 26 Sep 2018 at 15:11
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Blast furnace ironmaking
Significant Blast Furnace (BF) hearth lining life extension is the target of the improved BF-hearth lining observation management; provided by Paul Wurth, Germany, (PWDE). The hearth lining main property modifications occur noteless during the running BF-life campaign and influenced the real hearth lining wear profile. No classical hearth lining temperature and heat flux observation implemen ... More
Presented by Rudolf HEBEL on 25 Sep 2018 at 11:25
Type: Poster Session: Postersession and Coffee Break
Track: Poster
Pohang No.3 BF has been repaired it from February 24th to June 6th for 102 days. POSCO intend to improve operation efficiency and save costs by enlarging inner volume from 4,350 to 5,600m3. The relining criterion are that remaining of hearth refractory, wear of body shell, needs for increasing production and so on. Recently, the most critical point among them is the remaining of hearth refractory ... More
Presented by Mr. HYUNGWOO KIM on 26 Sep 2018 at 15:29
Type: Oral Presentation Session: Sintering
Track: Sintering
In recent years, substituting a part of coke breeze with a biomass fuel in the sintering of iron ores has became an attractive research topic, which should help with the minimization of CO2 released from fossil fuels as well as searching for an alternative for coke in ironmaking. Besides the common process analyses, characterization of sinter properties through the mineralogical composition repres ... More
Presented by Mr. Roland MEŽIBRICKÝ on 26 Sep 2018 at 09:40
Type: Oral Presentation Session: Modelling and simulation in coke and ironmaking
Track: Modelling and simulation in coke and ironmaking
The cohesive zone of the blast furnace generates major part of the pressure drop. It is considered that the thickness of the cohesive zone increases with decreasing the reducing agent rate and increasing the usage of the low grade raw materials in future. Thickening the cohesive zone increases the pressure drop and the failure of the blast furnace operation could occur in the extreme condition. ... More
Presented by Prof. Hiroshi NOGAMI on 27 Sep 2018 at 08:30
Type: Oral Presentation Session: Smelting reduction
Track: Smelting reduction
Hydrogen plasma smelting reduction (HPSR) is now an established alternative to be conside-red for upgrading existing ironmaking process and reducing the emission of greenhouse gases. HPSR offers thermodynamics and kinetics advantages over conventional carbo-thermic re-duction of iron ores. This process provides improved reducing conditions by the application of hydrogen in the plasma state and hig ... More
Presented by Mr. Masab NASERI SEFTEJANI on 26 Sep 2018 at 10:50
Type: Oral Presentation Session: Modelling and simulation in coke and ironmaking
Track: Modelling and simulation in coke and ironmaking
In the blast furnace, the onset of softening and melting of ferrous burdens give origin to the region known as the cohesive zone, which is critical to process stability and performance. The softening and meltdown temperatures of ferrous burdens are usually accessed by high temperature softening melting (HTSM) apparatus, which can, to some extent, simulate the blast furnace reduction, temperature a ... More
Presented by Mr. Ismael FLORES on 27 Sep 2018 at 10:40
Type: Oral Presentation Session: Keynote
Track: Keynote
The conversion of coal into coke is a complex process, involving interrelated phenomena occurring simultaneously. These include heat transfer, gas evolution, softening and resolidification, evaporation and condensation, bubble growth and coalescence, gas transport, shrinkage and fissuring. Moreover, a key aspect of coke quality is its (cold and hot) strength as well as its reactivity. Knowledge ... More
Presented by Dr. David JENKINS on 26 Sep 2018 at 08:00
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Blast furnace ironmaking
Direct reduced iron (DRI) can be used after briquetting in form of HBI in the blast furnace to decrease the consumption of reducing agents as well as to increase the production of hot metal. voestalpine Stahl GmbH Linz uses HBI from its own plant in Corpus Christi (Texas) at the blast furnaces 5 and 6. In this article the influence of the usage of HBI in the blast furnaces on the consumption of re ... More
Presented by Thomas BÜRGLER on 26 Sep 2018 at 14:30
Type: Oral Presentation Session: Blast furnace ironmaking
Track: Blast furnace ironmaking
Permeability at the cohesive and dripping zones in blast furnace is mainly controlled by the dripping behavior of molten slags in the cokes aggregates layer. Thus, wettability of cokes (graphite) which contains ash minerals should be one of the most important controlling factors on the dripping behavior. In the present study, the wettability of graphite-alumina composites with different alumina co ... More
Presented by Prof. Noritaka SAITO on 27 Sep 2018 at 08:30