回收磷酸铁锂材料金属元素浸出动力学研究

Study on Leaching Kinetics of Metal Elements in Recovered LiFePO4

采用盐酸对回收的磷酸铁锂正极材料中的金属元素进行浸出实验,重点研究了盐酸过量的比例、酸浸的温度、酸浸的时间等对金属元素浸出效果的影响。结果表明,在盐酸过量1.2倍、酸浸温度70℃、搅拌速度200r/min、时间45分钟条件下,金属元素的酸浸出率可以达到98.2%,实现了磷酸铁锂材料中金属元素的有效回收。

The leaching experiments of metal elements in recovered lithium iron phosphate cathode materials were carried out by using hydrochloric acid.The effects of excess proportion of hydrochloric acid,acid leaching temperature and acid leaching time on the leaching effect of metal elements were studied.The results showed that under the conditions of 1.2 times of hydrochloric acid,70℃acid leaching temperature and 200r/min time of 45 minutes,the recovery of the metal elements was carried out.The acid leaching rate of metal elements can reach 98.2%,which can effectively realize the effective recovery of metal elements in lithium iron phosphate materials.