RECOVERY METHOD FOR SPENT LITHIUM BATTERY MATERIALS

Disclosed in the present invention is a recovery method for spent lithium battery materials. The recovery method comprises the following steps: (1) subjecting a battery powder obtained by disassembling cells of spent lithium batteries to ammonia leaching, and performing solid-liquid separation to obtain a leachate and filter residues; (2) adding a fluorine-phosphorus precipitating agent to the leachate obtained in step (1), and performing solid-liquid separation to obtain a filtrate in which fluorine-phosphorus residues are removed; (3) subjecting the filtrate obtained in step (2) to ammonia distillation and solid-liquid separation to obtain a filtrate and filter residues containing basic cupric carbonate and lithium carbonate; (4) washing the filter residues obtained in step (3) with water, and separating the basic cupric carbonate to obtain washing water containing lithium carbonate; and (5) subjecting the filter residues obtained in step (1) to reduction roasting, then washing same, adding the washing wate