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Advanced Method for Recycling Red Mud by Carbothermal Solid-Phase Reduction Using Sodium Sulfite

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The paper presents the results of studying the iron grain growth mechanism during carbothermal solidphase reduction of red mud in the presence of sodium sulfate. It was shown that the main mechanism of iron grain growth involves the formation of low-melting-point surface-active iron-sulfur compounds along the grain boundaries, which significantly accelerates their agglomeration process. The obtained results confirm a positive effect of the sodium sulfate additives on the process of iron grain growth during solid-phase carbothermal reduction of red mud, which makes it possible to improve the efficiency of subsequent magnetic separation.

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The study was carried out with the financial support of The Russian Foundation for Basic Research (RFFI) within the scope of the research project No. 18-29-24186.

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Authors and Affiliations

  1. Institute of Metallurgy and Material Science named after A. A. Baikov, Russian Academy of Sciences, Moscow, Russia

    P. I. Grudinskii, D. V. Zinoveev, A. F. Semenov, A. S. Zakunov & V. G. Dyubanov

  2. National Research Technological University “MISiS”, Moscow, Russia

    A. S. Zakunov & A. L. Petelin

Authors
  1. P. I. Grudinskii
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  2. D. V. Zinoveev
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  3. A. F. Semenov
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  4. A. S. Zakunov
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  5. V. G. Dyubanov
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  6. A. L. Petelin
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Correspondence to P. I. Grudinskii.

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Translated from Metallurg, Vol. 63, No. 9, pp. 15–21, September, 2019. Original article submitted May 15, 2019.

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Grudinskii, P.I., Zinoveev, D.V., Semenov, A.F. et al. Advanced Method for Recycling Red Mud by Carbothermal Solid-Phase Reduction Using Sodium Sulfite. Metallurgist 63, 889–897 (2020). https://doi.org/10.1007/s11015-020-00906-z

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  • DOI: https://doi.org/10.1007/s11015-020-00906-z

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