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Optimized use of MgO flux in the agglomeration of high-chromium vanadium-titanium magnetite

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Abstract

The optimized use of MgO flux in the agglomeration of high-chromium vanadium-titanium magnetite was investigated systematically through sinter and pellet experiments. MgO was added in the form of magnesite. When the content of MgO in the sinter was increased from 1.95wt% to 2.63wt%, the low-temperature reduction degradation index increased from 80.57% to 82.71%. When the content of MgO in the pellet was increased from 1.14wt% to 2.40wt%, the reduction swelling index decreased from 15.2% to 8.6%; however, the compressive strength of the oxidized pellet decreased dramatically and it was 1985 N with an MgO content of 1.14wt%. This compressive strength does not satisfy the requirements for blast-furnace production. When all of the aforementioned results were taken into account, the sinter with a high MgO content (2.63wt%) matching the pellet with a low MgO content (less than 1.14wt%) was the rational burden structure for smelting high-chromium vanadium-titanium magnetite in blast furnaces.

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Authors and Affiliations

  1. School of Material and Metallurgy, Northeastern University, Shenyang, 110819, China

    Jue Tang, Man-sheng Chu & Xiang-xin Xue

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  1. Jue Tang
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  2. Man-sheng Chu
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  3. Xiang-xin Xue
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Correspondence to Man-sheng Chu.

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Tang, J., Chu, Ms. & Xue, Xx. Optimized use of MgO flux in the agglomeration of high-chromium vanadium-titanium magnetite. Int J Miner Metall Mater 22, 371–380 (2015). https://doi.org/10.1007/s12613-015-1082-2

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  • DOI: https://doi.org/10.1007/s12613-015-1082-2

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