Induration in steel industries is the process of pelletizing iron ore particles. It is an important unit operation which produces raw materials for a subsequent chemical reduction in Blast Furnace. Of the enormous amount of energy consumed by Blast Furnace, a large portion
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2018.7.11 1 Certain sub- stances such as hydrated lime serve as both additive and binder. Fines of anthracite or coke are also added
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2022.12.1 The induration process using straight-grate, grate-kiln, and vertical shaft kiln systems can be divided into four different stages drying, preheating, firing, and
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2013.10.1 The process for pelletizing iron ore fines is an important operation unit for producing high quality of raw materials for the subsequent reduction processes such as
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2009.6.16 Iron ore induration is a highly energy intensive process. In order to optimize energy consumption, off-gases from one section are re-circulated and utilized in
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2018.7.17 Induration process: the green pellets are hardened in a high temperature processing at controlled heating rates, and aiming to achieve the physical and
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2012 24th Chinese Control and Decision Conference. 2012. We present a mathematical model of iron ore pellet drying and induration in an industrial scale application, and
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2012.5.23 Materials Science. We present a mathematical model of iron ore pellet drying and induration in an industrial scale application, and validate it against measured
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2020.1.1 The induration process using straight-grate, grate-kiln, and vertical shaft kiln systems can be divided into four different stages drying, preheating, firing, and cooling
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KEY WORDS: iron ore pelletising; pellet induration; complex calcium ferrites; thermodynamic property; estimation of complex oxides; phase equilibria; mathematical
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Induration in steel industries is the process of pelletizing iron ore particles. It is an important unit operation which produces raw materials for a subsequent chemical reduction in Blast Furnace. Of the enormous amount of energy consumed by Blast Furnace, a large portion is utilized in processing the raw materials.
Read More2017.2.2 The current study revisits the particle combustion modeling in the simulation of iron ore pellet indurator, which is the process to dry and fire the pellets as a pretreatment for blast furnace.Although the shrinking core model has been frequently used in the previous studies due to its simplicity, its limitation for the porous pellet should have been evaluated.
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2022.5.1 The most widely used industrial process for pellet induration is the grate-kiln process in China [[7], [8], [9]]. The iron ore is first crushed into a powder, mixed with additives and a binder, and rolled into green pellets (10–15 mm in diameter) that are sintered to pellets in a furnace during pelletizing of iron ore [10,11].
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This process generates iron ore filter cake which needs to be pelletized to be used in the steel making process. Also during the processing of high grade iron ores which don’t need beneficiated, fines which are generated can be pelletized and used instead of being disposed of. ... then finish the induration process at roughly 1200-1350 °C ...
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2021.10.24 Limestone was used in the iron ore pelletization process to absorb SO 2 gas during the induration process and also enhanced the activity of bentonite. The limestone was ground to below 75 μm. The pellet feed materials were prepared by mixing iron ore fines (97.5%) with additives like anthracite coal (1%), bentonite (0.5%), and limestone (1% ...
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2015.10.31 At present various naturally available minerals containing MgO viz. olivine, pyroxenite, dunite, dolomite etc. are widely used in different plants to reduce RDI of iron ore pellets and improve other properties. However, properties of each of the above fluxes are physically and chemically different and they contain different types and
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2023.4.25 Pelletizing of iron ore concentrate is one of the proven agglomeration technologies. Pellet production has increased dramatically in the last three decades 1,2 as its share in feedstock of blast furnace and direct reduction iron making technologies is increasing day by day. Iron ore pellet making process involves balling of green mix
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2019.3.21 Following these pioneers, a substantial number of models have been put forward for iron ore sintering (Cumming and Thurlby, 1990, Young, 1977), and pellet induration in shaft furnaces (Norgate et al., 1985)), grate-kiln system (Cross and Young, 1976, Davis and Englund, 2003, Pape et al., 1976, Thurlby, 1988a, 1988b,
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2021.9.2 Iron ore concentrate of average size less than 100 µm was generated through beneficiation of goethite ore of Bolani iron ore mines. Green pellets of size 9–16 mm were produced in a laboratory disc pelletiser of 1 m diameter using the ore fines of minimum blaine value i.e. degree of fineness of the iron ore of 2000 cm 2 /g with 0.6% bentonite as
Read MoreIn a DR process, iron ore pellets and/or lump iron ores are reduced by a reducing gas to produce DRI or hot briquetted iron (HBI). Depending on the generation of the reducing gas, two different DR processes are commercially available: gas-based and coal/oil-based. ... Iron Ore Induration. The term induration describes the hardening of a powdery ...
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2015.1.1 Like other sintering processes, iron ore sintering converts iron ore fines of often − 8 mm sizing into larger agglomerates, namely, sinter, between 5 and 50 mm particle size, which possess the physical and metallurgical characteristics and gas permeability required for efficient blast furnace operation.As shown in Figure 14.1, iron ore sintering is
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2016.1.1 In the experimental process, the green pellets were made from a mixture of bentonite, iron ore and the slag. The green pellets were sintered in the resistance heating furnace maintaining ...
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2020.1.1 The induration process using straight-grate, grate-kiln, and vertical shaft kiln systems can be divided into four different stages drying, preheating, firing, and cooling [10,11]. Show abstract. ... The iron ore is first crushed into a powder, mixed with additives and a binder, and rolled into green pellets (10–15 mm in diameter) that are ...
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2013.2.23 There are four stages involved in the production of iron ore pellets. These stages consist of (i) raw material preparation, (ii) formation of green balls or pellets, (iii) induration of the pellets, and (iv) cooling, storage and transport of pellets. Raw material preparation – During the process for pelletization iron ore concentrate from ...
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2009.6.16 Section snippets Induration process model. The moving grate induration furnace is a cross-current packed bed gas–solid non-catalytic reactor. The physico-chemical phenomena that occur during induration of iron ore pellets include cross-current flow of gases through porous pellet bed, drying as well as condensation of moisture, heat and
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2010.10.9 A mathematical model of drying and preheating processes in a traveling grate was presented based on the laws of mass, momentum, heat transfer, and drying semiempirical relations. A field test was systematically carried out in a traveling grate. The effects of pellet diameter, moisture, grate velocity, and inlet gas temperature on the pellet
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2020.10.23 The scarcity of iron ore concentrate resources is a real fact, and a search for alternative resources seems to be unavoidable [1, 2].For many years, magnetite iron ore mines, containing high-sulfur content (up to 2.0%), were not very welcomed in steel industry; however, they are nowadays increasingly receiving attention as potential sources and
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2012.5.23 We present a mathematical model of iron ore pellet drying and induration in an industrial scale application, and validate it against measured data. The model is based on the laws of mass and heat transfer, and incorporates both physical and chemical processes. The partial differential equations of the process kinetic model involve
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2021.4.1 Samples of four iron ore concentrates that are fed to Valés pelletizing plants at Complexo de Tubarão (Vitória, Brazil) have been collected. Three of these concentrates (Itabira, Brucutu and Timbopeba) are produced by flotation of ores from the Iron Quadrangle in the state of Minas Gerais (Brazil), having a top particle size of 1 mm.
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2020.9.1 The scarcity of high-grade iron ore resource and availability of the considerable quantity of low-grade iron ore fines, banded hematite quartzite (BHQ) ore in mines (mostly in Bihar, Odisha, Madhya Pradesh, and Karnataka), has to lead the way to beneficiate and utilize the concentrate as pellet feed for the steelmaking process.
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