废旧三元动力电池资源化回收锂的工艺优化  

Process Optimization of Recycling Lithium from Waste Ternary Power Battery

作　　者：董晓伟[1] 赵剑波[1] DONG Xiao-wei;ZHAO Jian-bo(CINF Engineering Co.,Ltd.,Changsha 410000,China)

机构地区：[1]长沙有色冶金设计研究院有限公司,湖南长沙410000

出　　处：《稀有金属与硬质合金》2021年第4期11-14,共4页Rare Metals and Cemented Carbides

基　　金：国家科技重大专项(2018ZX04040001);。

摘　　要：针对废旧三元动力电池回收工艺流程长,锂回收率低,且大部分企业锂回收仅生产粗制碳酸锂、磷酸锂,产品附加值低的现状,采用浮选-还原焙烧碳化提锂工艺生产电池级碳酸锂。结果显示,在优化工艺指标和设备参数下,锂回收率大于90%;通过浮选除去大部分负极石墨,可有效地减小浸出设备和压滤设备规格,并缩短后续镍钴锰元素回收工艺流程,减少萃取过程中的酸耗和碱耗;碳化提锂溶液杂质含量低,经净化处理后可生产电池级碳酸锂,从而提高企业经济效益。In view of the long recovery process and low lithium recovery rate of waste ternary power batte-ry,and the situation that most enterprises only produce crude lithium carbonate and lithium phosphate,and the added value of products is low,the lithium extraction process of flotation-reduction roasting carbonization is used to produce battery grade lithius carbonate.The results show that under the optimized process index and device sign parameters,the recovery rate of lithium is more than 90%.The removal of most ne-gative graphite by flotation can effectively reduce the specifications of leaching equipment and pressure filtration equipment,shorten the subsequent recovery process of nickel,cobalt and manganese,and reduce the acid and alkali consumption in the extraction process.The impurity content of the solution after lithium extraction by carbonization is low,and the battery grade lithium carbonate can be produced after purification,which can improve the economic benefit of the enterprise.

关 键 词：废旧三元动力电池 锂回收 碳酸锂 浮选 还原焙烧碳化 

分 类 号：TF19[冶金工程—冶金物理化学]