The production of manganese dioxide from manganese ores of some deposits of the Siberian region of Russia

• Published in: Hydrometallurgy Vol. 56; no. 1; pp. 1 - 11
• Main Authors: Kholmogorov, A.G., Zhyzhaev, A.M., Kononov, U.S., Moiseeva, G.A., Pashkov, G.L.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-05-2000
• ISSN: 0304-386X; 1879-1158
• DOI: 10.1016/S0304-386X(99)00084-5

The reductive leaching of manganese from oxidised manganese ores has been investigated. Preliminary mechanical activation of concentrate was used for increasing manganese extraction. A two-stage leaching with additional grinding of insoluble residue after the first-stage leaching was also carried out for this purpose. Recovery of 98.6–98.9% Mn in solution was achieved in both cases. The purification of solution by a sorption technique was effectively used. Electrolytic grade γ-MnO
2 with a few impurities was obtained. Cells using the manganese dioxide so produced were prepared and tested.