三元正极废粉与聚丙烯共热解-水浸选择性提锂研究  

Selective Extraction of Lithium by Co-Pyrolysis of Spent NCM Cathode Powder and Polypropylene Followed by Water Leaching

作　　者：田彤麟 任国兴 郭巍巍 肖松文 TIAN Tonglin;REN Guoxing;GUO Weiwei;XIAO Songwen(Zhongyuan Critical Metals Laboratory,Zhengzhou University,Zhengzhou 450001,Henan,China;Henan Xin′anli Security Technology Co.,Ltd.,Zhengzhou 450000,Henan,China)

机构地区：[1]郑州大学中原关键金属实验室,河南郑州450001 [2]河南鑫安利安全科技股份有限公司,河南郑州450000

出　　处：《矿冶工程》2024年第4期100-104,共5页Mining and Metallurgical Engineering

基　　金：郑州大学高层次人才科研启动项目(32340402)。

摘　　要：开展了三元正极废粉与聚丙烯型隔膜共热解-水浸选择性提锂试验,并对反应产物进行了表征。结果表明,在聚丙烯用量40%、热解温度550℃、热解时间2 h、氩气流速200 mL/min条件下共热解,热解产物水浸,锂浸出率为87.92%。锂损失的主要原因是共热解过程中形成了不溶于水的锂钴氧化物。An experiment was conducted on selective extraction of lithium by co-pyrolysis of spent NCM cathode powder and polypropylene followed by water leaching,and the obtained pyrolysis products were characterized.In the experiment,co-pyrolysis of NCM cathode powder with 40%polypropylene ran at 550℃for 2 h,with argon flow rate at 200 mL/min,and then the obtained pyrolysis product was subjected to water leaching,resulting in the lithium leaching rate of 87.92%.It is found that lithium loss is mainly attributed to the formation of water-insoluble lithium cobalt oxide during co-pyrolysis.

关 键 词：废旧锂离子电池 三元正极粉 热解还原 锂 聚丙烯 水浸 

分 类 号：X705[环境科学与工程—环境工程]