Citation

Kononov R, Ostrovski O, Ganguly S. ISIJ International 2009; 49(8): 1115-1122.

Copyright

(Copyright © 2009)

DOI

10.2355/isijinternational.49.1115

PMID

unavailable

Abstract

The paper considers phase development in the process of solid state carbothermal reduction of Wessels (South Africa) and Groote Eylandt (Australia) manganese ores in inert gases and hydrogen. Reduction starts with reduction of higher manganese oxides to MnO and iron oxides to metallic iron. When the graphite content in the graphite/ore mixture was in excess relative to the stoichiometric ratio, the final reduction product was (Fe, Mn)7C3 carbide. In the process of reduction of Groote Eylandt ore, silica also was reduced. In the reduction of high silica-ore, manganese oxide was predominantly reduced from tephroite and rhodonite. Silicon in the alloy was present in the form of ferrc-manganese-silicon carbide and suicide (Fe, Mn)5Si3. © 2009 ISIJ.

Language: en

Keywords

Australia; South Africa; Silicon carbide; Silica; Phase composition; Silicon alloys; Manganese; Manganese compounds; Graphite; Iron oxides; Metallic compounds; Carbothermal reduction; Graphite content; Groote eylandt ore; Inert gases; Manganese ore; Manganese oxide; Metallic iron; Minerals; Ore reduction; Ores; Phase development; Reduction products; Silicate minerals; Solid state reduction; Stoichiometric ratio; Wessels ore