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2018年7月11日 A Mathematical Model for Straight-Grate Iron Oxide Pellet Induration Furnace: Formulation, Plant Scale Validation, Implementation
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2023年7月4日 The ISO 4698 standard (Iron ore pellets for blast furnace feedstocks—Determination of the freeswelling index) is used to quantify the pellet
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48 行 2020年3月23日 1 Introduction. A blast furnace (BF) is the most common process for hot metal production in the world. The BF is charged with metallurgical coke and iron
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2021年9月20日 With rapid development of the pellet production under the background of green development, high-quality iron concentrates were gradually exhausted; thus, using
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2018年7月17日 The iron ore pelletizing process consists of three main steps: Pelletizing feed preparation and mixing: the raw material (iron ore concentrate, additives
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2017年4月18日 A production technology for iron-ore materials with improved metallurgical characteristics is developed and tested. The following materials are considered: fluxed
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2022年2月27日 To explore the reduction swelling process of pellets prepared from the Bayan Obo iron ore concentrate, based on the iron oxide reduction theory of pellets, the
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2023年12月8日 Twenty different iron ore pellets, consisting primarily of Hematite (Fe2O3) phase, were subjected to ‘simulated’ reduction studies. A wide range of reduction time periods, Rt of 122 to 211 minutes, were obtained. Detailed microstructural characterizations were then conducted at different locations of ten selected specimens. The Rt did not
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Shaft furnaces use pellets (produced in the same way as pellets for the BF), or lump ore. Raw material for pellets is produced by crushing and grinding low-grade iron ores—typically of the taconite class and finer than 325 mesh (0.044 mm)—and magnetically separating the iron oxide (magnetite, Fe 3 O 4 ) from the siliceous gangue.
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Customers producing steel in electric steel furnaces instead use our direct reduction pellets, commonly referred to as DR pellets. Our high pellet quality generates less slag, lower energy consumption, higher productivity and lower maintenance and wear in steelmaking. About 20% of our iron ore production is turned into magnetite fines (MAF).
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DOI: 10.1016/j.fuel.2023.128375 Corpus ID: 258392143; A numerical study on process intensification of hydrogen reduction of iron oxide pellets in a shaft furnace @article{Shao2023ANS, title={A numerical study on process intensification of hydrogen reduction of iron oxide pellets in a shaft furnace}, author={Lei Shao and Jin Xu and
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2024年1月26日 The production of iron ore pellets from fines to finished product can differ based on a variety of factors. As such, it’s important to note that the process described here is a generalized approach subject to many variations. ... The induration process creates a strong pellet product capable of withstanding the charge weight of the furnace ...
خبير الاتصال2023年5月4日 The shaft furnace operates using a counterflowing ore and reducing gas to produce a sponge iron product, requiring ore in pellet form with minimum 67% Fe content 21 to limit ore impurities and ...
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2020年7月26日 Raw materials. Commercially supplied iron ore pellets and sinter of size range 10–13 mm are utilised in the present study. Comparable to the utilisation in the industrial blast furnace, two types of olivine fluxed pellets (types 1 and 2) and one type of iron ore sinter are mixed in 40:20:40 ratio to form a ferrous raw material bed.
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2023年4月25日 The straight-grate induration furnace is a non-catalytic packed bed reactor having cross current flow of gas-solid media. Different physio-chemical phenomenon occur during pellet bed traveling on the grate like drying and condensation of free surface moisture, combustion of carbon or coke particle, calcination of limestone, LOI or
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2021年9月20日 Iron ore pellets have been proved to possess preferable size and shape, mechanical strength and metallurgical properties, compared with the sinters during the blast furnace ironmaking process [4, 5]. Under the background of green development, it is an inevitable trend to increase the proportion of pellets in blast furnace burden.
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2015年8月10日 Acid iron ore pellets with 4.6 wt.% SiO 2 manufactured by Severstal Resources in Karelia were used in the investigations. Both test pellets were produced in a laboratory-scale pelletizing drum and fired in sample baskets set in the middle of the sintering belt on the same production line as commercial blast furnace pellets.
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2017年6月15日 Abstract. Steel may be produced in an arc furnace from reduced iron-ore pellets that are supplied to the melt through hollow electrodes. Thermoelectric aspects of this process are considered. A method of charging the pellets in accordance with the thermal conditions in the furnace is proposed. The new method of pellet charging intensifies batch ...
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2015年3月4日 Iron ore pellets are largely characterized by inherent physical and chemical properties of ore as well as pelletizing conditions including induration time, induration temperature, etc. These parameters essentially vary with types of ores. The production of high-quality pellets from hematite ore is challenging because of high level of fineness
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It is important to realize the difference between DR-grade pellets, blast furnace pellets, and lump ore to fully understand the effect of substituting materials. From research and testing in plants by iron ore companies, it has been established that the optimum composition of a DR-grade oxide pellet depends on specific plant conditions.
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2023年12月29日 The IIMA forecasts a gap in 2033 of around 34 million mt in DR-grade iron ore pellets factoring in demand growth from global DRI plants, in a November presentation. Even with some lower quality blast furnace pellets being used for DRI, the IIMA estimates a remaining gap of 18 million mt—equivalent to around 12 million mt/year of
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2020年3月23日 A blast furnace (BF) is the most common process for hot metal production in the world. The BF is charged with metallurgical coke and iron-bearing materials separately, which leads to a layered structure. ... Even though some research has considered all iron-bearing materials (sinter, iron ore pellets, and lump ore), the authors
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2023年11月15日 Ilmenite is an important mineral resource containing Fe and Ti, and titanium concentrate can be obtained after beneficiation. Through the preparation of titanium concentrate oxidized pellets, gas-based shaft furnace reduction experiments, and melting and separation experiments, the phase changes during the roasting process of titanium
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2023年9月15日 Process intensification of the H 2 shaft furnace is investigated using a simplified algebraic model and a CFD shaft furnace model.. The theoretical maximum gas utilization degree is determined. • Process intensification can be achieved with a higher pellet reducibility or operating pressure.. Extending the reduction zone lowers the
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