研究了废旧锂电池芯粉中多种有价金属的回收工艺. 该工艺采用碱溶解铝-旋流分离铜-低液固比硫酸+双氧水浸出-水解净化-P507萃取-草酸沉钴-碳酸沉锂的流程, 优化了各单元步骤的操作参数, 钴、铜、铝、锂的回收率分别达到94%, 92%, 96%, 69.8%. 这种方法在浸出过程中使用酸量少, 溶剂可循环使用, 实现了多种有价金属的综合回收, 将为实现工业化综合回收废旧锂电池中有价金属提供依据.
The technique of comprehensive recovery valuable metals in waste lithium-ion battery powder was investigated. Cobalt, copper, aluminum and lithium are recovered by the flow of alkali dissolution, swirl classification, acid leaching, hydrolytic precipitation, solvent extraction and cobalt precipitation. Operation parameters of each step were optimized. The recovery efficiency of cobalt, copper, aluminum and lithium could be 94%, 92%, 96%, 69.8%, respectively. This method had advantages of little acid dosage, recycle usage on solvent and multiple valuable metals recovery. The study would be the basis for realizing comprehensively industrial recovery of valuable metals from waste lithium-ion batteries.
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