某废旧锂离子动力电池混合电极粉末分选试验

为了提高废旧锂电池材料的利用效率,减少湿法回收镍、钴等有价金属过程中的处理量、降低生产成本,对某废旧三元锂离子动力电池正负极混合电极粉末开展了物理分选试验研究。试验结果表明,采用热解预处理-物理分选工艺,取得了石墨精矿固定碳品位93.64%、回收率88.36%,正极粉末含镍15.18%、含Co 7.65%、含碳0.71%,回收率分别为Ni 94.55%、Co 95.25%的试验指标。工艺实现了绝大部分的正电极粉末与石墨的清洁、高效分离,为冶金湿法提取有价金属创造有利条件。

Pyrolysis-Beneficiation Process Experiment on aMixed Electrode Powder for a Spent Lithium-ion Batteries

In order to improve the utilization efficiency of spent lithium-ion batteries materials, reduce the processing capacity of wet recovery of valuable metals such as nickel and cobalt, and reduce the production cost, a physical separation test was carried out on the positive and negative mixed electrode powder of a waste ternary lithium battery. The test result shows that the graphite assaying C 93.64% at the recovery of 88.36%; the positive powder assaying Ni 15.18%, Co 7.65% and C 2.90% at the recovery of Ni 94.55% and Co 95.25%, respectively were obtained by using the process of pyrolysis-beneficiation. The process achieved clean and efficient separation of positive electrode powder and graphite which created favorable conditions for wet metallurgical extraction of valuable metals.