The Optimum Technology of Preparing Manganese Sulfate

The process of proparing manganese from pyrolusite by reductive leaching are studied and the optimum leaching condition is obtained. On leaching conditions as follows pyrolusite∶pyrite∶sulfuric acid ratio is 1∶0 3∶0 45, the leaching temperature 96℃, leaching time 7 h, the solid liqud ratio is 1∶5, leaching Mn percentage of 97 00%. The technology has some advntages, such as saving energy, low production cost and high recovery of Mn.