Preparation of highpurity manganese dioxide by leaching manganese ore with ferrous sulfate from by-product of titanium white;

Preparation of high-purity manganese carbonate by leaching manganese ore with sulfur dioxide;

The process of preparation of manganese sulfate by brewer grains and sulfuric acid leaching with brewer grains and manganese ore taillings as raw materials was studied,and the technological conditions for leaching manganese with brewer grains and sulfuric acid were approached through orthogonal experiment.

The process of preparing manganese from low-grade rhodochrosite was studied and the result showed that the key factors such as reducing agents(the Green alum,coal and hydrogen peroxide),sulfuric acid,liquid-solid ratio,pH,leaching temperature and time have important impacts on leaching manganese rate.