作者: Bo Yu, Yongjia Lei, Zhengshan Li, Zhengwen Huang

Abstract: The present study was based on the current situation that traditional waste battery recycling technology was complex, high-cost and not appropriate with the actual situation. Besides that, the process of preparing manganese tetroxide (Mn₃O₄) was high-cost, with high energy consumption, and no effective measures to avoid emission of toxic gas SO₂ when low cost considered. After combined with same points of two different processes, a new and complete set of processes has been developed, which could solve the above shortcomings and utilise waste battery for flue gas desulphurisation, and produce manganese sulphate (MnSO₄) byproduct and then Mn₃O₄. On the whole, this process realised the recycling of manganese resources and waste battery and zero emission of SO₂, solving the key bottleneck of waste battery recycling. The process of preparing of Mn₃O₄ was consistent with the principle of '3R' (Reduce, Reuse and Recycle) with the characteristics of simple process and good economic returns.

Keywords: waste battery, desulphurization, SO₂, Mn₃O₄, manganese resources, super recycling