2021.8.31 The main findings of this work suggested several practical means for the postponement of liquid formation at higher temperatures:
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2021.11.18 Iron ore pellets are commonly used as iron burden materials in blast furnaces. The pellets are small and hard iron ore balls. Their diameter is usually 10–16
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2020.5.14 The pellet-indurating furnace has self-regenerative gas flow, which leads to higher energy efficiency, thus resulting in lower consumption of fossil fuels. The consequence is the reduction in...
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2022.1.1 The integrated iron and steelmaking route involves blast furnace (BF) ironmaking followed by basic oxygen furnace (BOF) steelmaking. The BF uses sinter,
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2020.10.27 The cohesive zone is a region of low permeability in a blast furnace. This study shows the impact of the chemical composition of pellets on the metallurgical
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2015.1.1 Iron ore pellets are essential burden materials to improve the performance of modern blast furnaces, because they possess high iron grade, low silica and alumina
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2021.2.21 The proportion of pellets in burden increased from 28 to 55%, slag rate of blast furnace decreased from 280 to 215 kg/tHM, and the fuel rate decreased from 500 to
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2016.12.1 Iron ore (pellet, sinter and lump ore) is gradually reduced to iron in blast furnace. The reductions are a serial of heterogeneous gas solid reactions that take place
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2022.6.15 Blast furnaces are charged with iron ores in the form of pellets, sinter and/or lump ore and metallurgical coke in separate layers from the top of the furnace.
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2021.2.21 Abstract. In order to reduce the fuel rate of blast furnace and promote green development, Shougang Jingtang Steel company has built two straight grate indurating machines with a productivity of 8 million tons of iron ore pellets. In this paper, the production technologies of self-fluxed pellets with hydrated lime were studied and the
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2020.2.9 The DRI shaft furnace is a counter-current solid-gas reactor, where pre-heated iron ore pellets at 800 C are fed from the top to react with hydr ogen stream entering from the bottom of the reactor .
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2019.7.19 The current blast furnace mainly depends on agglomerates such as sinter or pellets and lump ore as iron resources, and the main reductants are derived from coal. The figure shows the production capacity scale by concentric circles. The annual production scale of one blast furnace reaches approximately four million ton.
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2022.2.2 1. Introduction. Iron ore pellets are an essential part of the blast furnace charge, with high grade, good strength, uniform particle size, good metallurgical properties, and so forth. 1,2 Especially, fluxed iron ore pellets have better high-temperature soft fusion performance and reduction performance. 3−5 However, the burden of the blast furnace is
Read More2022.3.14 Change in the specific coke consumption for furnaces nos. 5–9 from 2000 to June 2021 (inclusive). Full size image. ... The use of a large amount of iron ore pellets as part of a blast furnace charge often leads to the development of the peripheral operation of the furnace, a decrease in the durability of the charging devices, the formation of ...
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2020.5.14 The binder is an important additive widely applied in pelletizing iron ore concentrates, making iron ore pellets available as feedstocks for blast furnace ironmaking or direct reduction processes ...
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2021.2.20 The stability of blast furnace process depends upon the quality of raw materials charged into the furnace. Among iron-bearing materials, pellets are an important feed material for the blast furnace operation. However, pellets exhibit swelling inside the blast furnace due to the high temperature inside the furnace, which causes dissociation
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2021.5.20 The pressure on the steel industry to reduce its carbon footprint has led to discussions to replace coke as the main reductant for iron ore and turn to natural gas, bio-syngas or hydrogen. Such a major transition from the blast furnace-basic oxygen furnace route, to the direct reduction-electric arc furnace route, for steel production would
Read More2022.2.12 Abstract Iron ore, pellets, and sinter were reduced with hydrogen at 800 °C to understand the degree of reduction and the mineralogical aspects. The weight loss of goethite and limonite iron ore was noticed to be lower than that of magnetite and hematite varieties. X-ray diffractometry (XRD) indicated 100 pct Fe in the case of hematite, 93 pct
Read More2020.5.21 Iron ore pellets are largely characterized by inherent physical and chemical properties of the ore. Alumina and silica play important roles in determining the productivity of a Blast Furnace. On average, one percent increase in iron content improves productivity by 2% and reduces coke consumption by 1%. Therefore higher iron ore feed content to
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2018.10.1 The direct reduction (DR) of iron ore, usually followed by electric arc steelmaking, is an alternative route to the standard, blast furnace, basic oxygen route for making steel. Annual DR iron production (86 Mt in 2017) remains small, compared to the production of 1180 Mt of blast furnace pig iron [ 1 ]. However, an attractive feature of DR ...
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2022.2.10 Iron ore pellets are small and hard spherical particles agglomerated from a fine iron ore concentrate. They are used in the blast furnace process to produce hot metal. The diameter of blast furnace pellets is usually between 8 and 16 mm. In this study, a batch of magnesia iron ore pellets was first sieved into particle sizes of 8–10 mm, 10–12.7 mm,
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2019.7.19 Prepared iron ore (lump ore, pellets, sinter), coke, and limestone are charged into the top of the BF. A hot air blast (commonly enriched with oxygen) and often an auxiliary reductant (such as coal) are blown through the tuyeres near the bottom of the furnace (Huang and Andrade 2017).The hot air blast reacts with the coke in the burden
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2022.5.24 A kind of leaching residue generated during high pressure acid leaching of laterite nickel ore is creatively prepared as blast furnace charge for ironmaking. Results show that the briquettes with uniform shape, compressive strength higher than 72.3 N/pellet, and cracking temperature over 400 °C can be obtained by the non-binder briquetting with
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2012.8.2 Global steel production is based on the refining of liquid pig iron in basic oxygen converters. No technologies that do not use liquid pig iron are expected to replace this method in the coming decades, and ore and coal will remain the main raw materials used to make pig iron. Existing technologies that produce liquid pig iron outside the blast
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2019.6.6 Lowering the carbon consumption and fossil CO2 emissions is a priority in blast furnace (BF) ironmaking. Renewable biomass is one option that can play an important role in future low-carbon ironmaking particularly in the countries rich in biomass resources. In this study, full-scale trials to investigate the impact of briquettes containing torrefied
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2021.11.3 Abstract Considering the modern level of technological development, the efficiency for making cast iron in blast furnaces has reached its limit. The technology for improving the productivity of blast-furnace, considered in this article, consists in using high-strength partially reduced iron ore pellets, which allows cutting back the consumption of
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2018.11.26 Based on the proportion of high pellet in blast furnace, scholars have done relevant studies [7,[25][26] [27]. Wang et al. [22] measured the relevant parameters of the high pellet ratio stockpile ...
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2018.12.18 As a promising method to strengthen the blast furnace smelting and to realize reduced fuel operation, high-proportion pellet charging has become the practice of BF ironmaking. Use of pellet gives rise to uniform bed permeability in comparison with iron ore or sinter. This leads to better gas–solid contact resulting in higher productivity at
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2022.2.10 Iron ore pellets are small and hard spherical particles agglomerated from a fine iron ore concentrate. They are used in the blast furnace process to produce hot metal. The diameter of blast furnace pellets is usually between 8 and 16 mm. In this study, a batch of magnesia iron ore pellets was first sieved into particle sizes of 8–10 mm, 10–12.7 mm,
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