Beijing University of Technology

Kwai Games Pte. Ltd.

Commercial Aircraft Corporation of China, Ltd.

Beijing Aeronautical Science & Technology Research Institute, Commercial Aircraft Corporation of China

Yifan Wang

Wei Wang

Hui Li

Xing Li

Dean Pan

Qijun Zhang

Ge Song

Xiaoguang Zhang

Jiaqi Hu

Jingjie Cong

Shunda Wen

Dongming Xu

Decai Wu

The present invention provides a method for preferentially recovering manganese from waste lithium-rich manganese-based cathode material, the method comprising: step 1) calcination and leaching: mixing the waste lithium-rich manganese-based cathode material with ammonium sulfate and then performing low-temperature calcination, leaching the calcination product with water, and then performing solid-solution separation to obtain a leaching solution; step 2) complexing and manganese separating: adding ammonium sulfite to the leaching solution obtained in step 1) for a complex reaction to obtain manganese-rich residue; step 3) oxidation leaching: adding an oxidant to the manganese-rich residue obtained in step 2) to perform oxidation leaching, and adjusting the pH of the solution to obtain a manganese-rich solution; and step 4) extracting and stripping. The method realizes the preferential and productive recovering of manganese from waste lithium-rich manganese-based cathode materials, avoids the negative impact of polymetals in the conventional recovery process, and has economic and environmental benefits.

Method for preferentially recovering manganese from waste lithium-rich manganese-based cathode material

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Beijing, China

Yifan Wang