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

The effects of reducing agent, CaF 2 content, and reaction temperature upon the silicothermic reduction of MnO in the BaO-MnO-MgO-CaF 2 (-SiO 2 ) 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 ...

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Veröffentlicht in:	Metallurgical and materials transactions. B, Process metallurgy and materials processing science Process metallurgy and materials processing science, 2018-04, Vol.49 (2), p.514-518
Hauptverfasser:	Heo, Jung Ho, Park, Joo Hyun
Format:	Artikel
Sprache:	eng
Schlagworte:	Barium oxides Calcium fluoride Characterization and Evaluation of Materials Chemical reduction Chemistry and Materials Science Communication Magnesium oxide Manganese oxides Materials Science Metallic Materials Metallurgy Nanotechnology Recovery Silicon dioxide Silicothermic reactions Slag Structural Materials Surfaces and Interfaces Thin Films
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Zusammenfassung:	The effects of reducing agent, CaF 2 content, and reaction temperature upon the silicothermic reduction of MnO in the BaO-MnO-MgO-CaF 2 (-SiO 2 ) 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 CaF 2 content and 1873 K (1600 °C) reaction temperature. Increasing CaF 2 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 Ba 2 SiO 4 .
ISSN:	1073-5615 1543-1916
DOI:	10.1007/s11663-018-1175-1