Global and Chinese High-Purity Manganese Sulfate Industry, 2019
Manganese sulfate is an important raw material for producing other manganites and manganese salt products. It is widely used in industry, agriculture, medicine and other fields. Seeing from economic angle, producing manganese sulfate through low grade manganese ore leaching is very important. In recent years, there are many researches which study adopting the reduction leaching of hydrogen peroxide, green vitriol, sawdust, sucrose and other substances and preparing high-purity manganese sulfate by using low grade pyrolusite as raw material. But there are few researches which are related to direct acid leaching to produce manganese sulfate by using low grade manganese carbonate ore. This is due to the high content of iron, calcium, magnesium and other impurities in manganese carbonate ore. Their separation and edulcoration are comparatively difficult, so the quality of manganese sulfate products is seriously influenced. Therefore, the researches which study direct acid leaching process of manganese carbonate ore, purification process of lixivium and crystallization and preparation of high-purity manganese sulfate are very important to fully develop and utilize our rich low grade manganese ore resources.