A Method For Recovering Lithium Compound From An Anode Material In Spent Lithium Batteries By Wet-Milling

摘要

The present invention relates to a method for recovering a lithium compound from spent lithium battery cathode material. The method according to the present invention comprises the steps of: mixing a cathode material separated from a spent lithium battery, polybasic acid and water; and wet-milling the mixture to produce an aqueous leachate and water insolubles. The method for recovering a lithium compound from a spent lithium battery cathode material according to the present invention has advantages over conventional methods using inorganic acids, including hydrochloric acid, sulfuric acid and nitric acids, in that environmental pollution can be reduced and in that the process is simple so that lithium can be recovered at low costs. Furthermore, the method of the present invention has higher leaching efficiency than methods of leaching a cathode material using an organic acid such as oxalic acid, citric acid, maleic acid or tartaric acid, and thus it can achieve recovery of the lithium compound with high purity at a high recovery rate.