A comprehensive flowsheet was designed for the treatment of manganese containing wastes to produce a high-purity manganese product with the objective of creating an eco-friendly way to recover useful resources from waste materials. The process involved leachingLeaching the waste material in reducing atmosphere by purging SO2 gas, which facilitated the dissolution of manganese into the solution at pH < 2.0. The leachate was neutralized by adding fresh Mn residue to raise the solution pH ~ 4.0, thereby causing the iron impurity (Fe) to precipitate out. After the neutralization stage, the manganese-rich solution was put through the purification step to remove process impurities and enhance the purity of manganese sulphate solution. In the final step, manganese was precipitated from the manganese solution to form tri manganese tetroxide (Mn3O4) of over 98.5% purity and containing 71% manganese (Mn), with over 90% metalRecovery recoveryMetal recovery. The leaching process left a residue with valuable lead and silver, which may be recycled for metal recoveryRecovery.