METHOD FOR RECOVERING VALUABLE METAL FROM MANGANESE NODULE OR COBALT CRUST BY SEPARATION

摘要

PURPOSE:To recover valuable components in high yield without causing environmental pollution, by treating ores with a sulfurous acid solution to eluate valuable components and then by subjecting the eluate to oxidation, etc., so as to separate Fe and Mn and also to leave Cu, Ni, Co, etc., in the filtrate. CONSTITUTION:The ores of manganese nodule and cobalt crust are crushed, which is agitated in a sulfurous acid solution of =0.01mol/l H2SO4 concentration to eluate valuable components. The residue of dissolution is separated, and air is blown into the eluate to oxidize Fe2+ into Fe3 and further Fe(OH)3 is precipitated in an acidic region to undergo separation by filtration. Subsequently, ammonium carbonate is added to the above eluate and further ammonium salt, etc., are added so as to carry out air oxidation, which is allowed to stand to undergo precipitation of Mn in the form of MnCO3. This precipitate is separated and valuable components such as Cu, Ni, Co, etc., are left in the filtrate. In this way, the valuable components can be recovered in a yield as high as =about 90% by a simple equipment.