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Manganese Recovery by Silicothermic Reduction of MnO in BaO-MnO-MgO-CaF2 (-SiO2) Slags

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Abstract

The effects of reducing agent, CaF2 content, and reaction temperature upon the silicothermic reduction of MnO in the BaO-MnO-MgO-CaF2 (-SiO2) slags were investigated. Mn recovery was proportional to Si activity in the molten alloy. Moreover, 90 pct yield of Mn recovery was obtained under 5 mass pct CaF2 content and 1873 K (1600 °C) reaction temperature. Increasing CaF2 content above 5 pct yielded little or no further increase in Mn recovery, because it was accompanied by increased slag viscosity owing to the precipitation of high melting point compounds such as Ba2SiO4.

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Authors and Affiliations

  1. Department of Materials Engineering, Hanyang University, Ansan, 426-791, Korea

    Jung Ho Heo & Joo Hyun Park

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  1. Jung Ho Heo
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  2. Joo Hyun Park
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Correspondence to Joo Hyun Park.

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Manuscript submitted September 16, 2017.

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Heo, J.H., Park, J.H. Manganese Recovery by Silicothermic Reduction of MnO in BaO-MnO-MgO-CaF2 (-SiO2) Slags. Metall Mater Trans B 49, 514–518 (2018). https://doi.org/10.1007/s11663-018-1175-1

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  • DOI: https://doi.org/10.1007/s11663-018-1175-1

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