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Influence of the Gangue Compositions on the Reduction Swelling Index of Hematite Briquettes

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Abstract

The effect of gangue compositions and the basicity (CaO/SiO2) on the RSI (reduction swelling index) of hematite briquettes was investigated using pure reagent briquettes. The results show that CaO can increase the RSI of the fired briquettes, while the MgO, Al2O3, and SiO2 can decrease the RSI of the fired briquettes. The RSI is related to the porosity and the mineral phases of the fired briquettes, and the morphology of metallic iron in the reduction process. The fired briquettes containing CaO present a higher porosity than that of the other briquettes, which is beneficial to increase the reduction reaction rate and promote the formation of metallic iron whiskers. With the increase of the porosity of briquettes, the RSI of briquettes increases.

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Acknowledgments

This work was supported by the National Science Foundation of China (Grant No. 51774005) and Natural Science Research Project for Anhui Universities (No. KJ2018A0045).

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Authors and Affiliations

  1. School of Metallurgical Engineering, Anhui University of Technology, Ma’anshan, 243002, Anhui, P.R. China

    Ping Wang, Mengbo Dai, Tiejun Chun, Hongming Long & Jun Wei

  2. Key Laboratory of Metallurgical Emission Reduction & Resources Recycling (Anhui University of Technology), Ministry of Education, Ma’anshan, 243002, P.R. China

    Hongming Long

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  1. Ping Wang
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  2. Mengbo Dai
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  3. Tiejun Chun
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Correspondence to Tiejun Chun.

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Manuscript submitted January 15, 2021, accepted April 5, 2021.

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Wang, P., Dai, M., Chun, T. et al. Influence of the Gangue Compositions on the Reduction Swelling Index of Hematite Briquettes. Metall Mater Trans B 52, 2139–2150 (2021). https://doi.org/10.1007/s11663-021-02177-8

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