Ferromanganese an overview | ScienceDirect Topics
Manganese ores contain manganese in various oxide forms ranging from MnO 2, Mn 2 O 3, Mn 3 O 4, to MnO. Manganese oxides higher than MnO are unstable and decompose to MnO in the presence of CO below the smelting temperature, and MnO is reduced by carbon at the smelting temperature. ... In dry cell battery plants and ferromanganese plants, the ...