Analysis of Operational Parameters Affecting the Sulfur Content in Hot Metal of the COREX Process

Wu, Shengli; Wang, Laixin; Kou, Mingyin; Wang, Yujue; Zhang, Jiacong

doi:10.1007/s11663-016-0810-y

Cited by 8 publications

(2 citation statements)

References 14 publications

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“…The CVRD pellets had a higher RDI -0.5 , despite the RDI -3.15 being lower. Previous work has shown that the basic reason for the reduction degradation of iron ore is that, during the reduction of Fe 2 O 3 at low temperature (673-873 K), the transformation of haematite to magnetite causes crystal lattice deformation and an increase in internal stress, which contributes to the degradation of the ore Wu et al, 2017). Figure 7 shows the bonding index, volume shrinkage, and degree of reduction of iron ore samples after the bonding property test.…”

Section: Metallurgical Properties Of Iron Ores For Experiments Experimentioning

confidence: 99%

“…The COREX process consists of two reactors: the prereduction shaft furnace and the melting gasifier as shown in Figure 1 (Wu et al, 2017). Pellets and lump ores which are charged to the prereduction shaft should have a good reducibility and metallization with a low degradation index (Li et al, 2016;Wu et al, 2011;Kumar et al, 2009;Kang, Gupta, and Sahajwalla, 2007).…”

Section: Introductionmentioning

confidence: 99%

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Optimization of iron ore blending in the COREX shaft furnace

Liu

Wang

et al. 2019

J. S. Afr. Inst. Min. Metall.

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To extend the variety of lump ores that are used in the COREX shaft furnace and to optimize iron ore blending, the original evaluation method for iron ores that was proposed by Voestalpine AG has been improved. Physicochemical and metallurgical properties of iron ores, including Sishen lump ore and CVRD pellets, which are currently used in the COREX process, and three other lump ores, were assessed and compared. Ore matching principles were proposed and five optimized iron ore blending schemes designed and verified by laboratory experiments to prove the effectiveness of the improved evaluation method. The replacement of Sishen lump ore by the alternative L2 and L3 lump ores without varying the proportion of CVRD pellets could improve the degree of reduction and rate of metallization, and decrease the bonding index. Based on the results of laboratory test work and industrial-trials, an ore blending scheme of 60% CVRD, 20% L2, and 20% L3 is recommended for use in the COREX process.

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Section: Metallurgical Properties Of Iron Ores For Experiments Experimentioning

confidence: 99%