PROCESS FOR EXTRACTING A MANGANESE OXIDE CONCENTRATE AND SEPARATELY METALLIC COPPER NICKEL AND COBALT, FROM MANGANESE ORES

摘要

A process for extracting a manganese oxide concentrate of metallic copper, nickel and cobalt from manganese, such as maritime manganese concentrations. The ore is first finely ground and then is leached in an aqueous suspension at temperatures of 90 DEG -100 DEG C. and at a pH value above 3 with sulfur dioxide or sulfurous acid and the resulting manganese sulfate is separated by crystallization and subsequent thermal decomposition of the manganese sulfate. The aqueous solution is separated from the residue in a known manner.