Recovery and Utilization of Electrolytic Manganese Anode Slime for the High-Value Industrialized Products─A Review

The high-value recovery and utilization of electrolytic manganese anode slime (EMAS) have emerged as a pressing concern in the global electrolytic manganese industry. EMAS, a black-brown byproduct generated during the electrolytic process of manganese metal, contains over 40% Mn as well as heavy metals, such as Pb and Se. This Review delves into the status of research pertaining to the properties of EMAS as a resource, waste reduction strategies, and resource utilization both at home and abroad. The resource reduction technology of EMAS focuses primarily on modifying titanium-coated electrolytic manganese anode plates, adding additives, regulating electric currents, and developing advanced electrolytic equipment. The resource utilization technology, on the other hand, centers around the recovery and separation of Mn, Pb, and Se to generate MnO2, LiMn2O4, high-purity MnSO4, adsorbent, catalyst, and oxidant products. Furthermore, this Review points out the existing issues and future development prospects of EMAS. The research results of this Review will provide technical support for global EMAS comprehensive resource utilization and manganese pollution treatment in electrolytic manganese enterprises.