废弃锂离子电池富钴粉体可浮性的改善  

Floatability Improvement of Co-enriched Powders Recovered from Spent Lithium-ion Battery

作　　者：张伟刚[1,2] 何亚群[1,2,3] 张涛[1,2,3] 张光文[1,2] 王婕[1,2] 

机构地区：[1]上海第二工业大学上海电子废弃物资源化产学研合作开发中心,上海201209 [2]中国矿业大学化工学院,江苏徐州221116 [3]中国矿业大学现代分析与计算中心,江苏徐州221116

出　　处：《中国粉体技术》2016年第1期23-27,共5页China Powder Science and Technology

基　　金：国家自然科学基金项目,编号:51574234;上海电子废弃物资源化产学研合作开发中心开放基金项目,编号:ZF1224-07

摘　　要：为了通过浮选高效分离、回收废弃锂离子电池富钴粉体中的钴酸锂和石墨,采用增大钴酸锂和石墨的可浮性差异的方法,以Fenton试剂作为改性剂,对废弃锂离子电池中回收的富钴粉体进行表面改性处理;采用X射线光电子能谱分析Fenton试剂的改性过程,并采用透射电子显微镜对改性后的产物进行表征;通过浮选实验验证富钴粉体可浮性的改善效果。结果表明:Fenton试剂可以有效降解去除富钴粉体颗粒外层的有机杂质,使钴酸锂和石墨的表面润湿性差异增大,提高富钴粉体的可浮性;改性后钴元素的浮选富集比达到1.41,回收率达到99%。To efficiently separate and recover LiCoO_2 and graphite in Co-enriched powders recovered from spent lithium-ion batteries,the method of increasing the difference of floatability of LiCoO_2 and graphite was used. Fenton reagent was used as a modifier to modify the surface of Co-enriched particles. The modification process was analyzed by XPS and the modified products were characterized by TEM. The improved effect of floatability of the Co-enriched powders was tested by the floatation experiment. The results show that Fenton reagent can effectively remove the organic impurity on the surface of Co-enriched particles and increase the difference of surface wettability of LiCoO_2 and graphite,which improves the floatability of Co-enriched powders. After modification the enrichment ratio of Co reaches 1.41 and the recovery of Co element reaches 99%.

关 键 词：废弃锂离子电池 富钴粉体 浮选 

分 类 号：X75[环境科学与工程—环境工程]