ZHANG Weigang1, 2a， HE Yaqun1, 2a, b ， ZHANG Tao1, 2a, b ， ZHANG Guangwen1, 2a， WANG Jie1, 2a
（1. Shanghai Cooperative Centre for WEEE Recycling， Shanghai Second Polytechnic University， Shanghai 201209， China； 2. a. School of Chemical Engineering and Technology； b. Advanced Analysis and Computation Center， China University of Mining and Technology， Xuzhou 221116， China）
Abstract：To efficiently separate and recover LiCoO2 and graphite in Co-enriched powders recovered from spent lithium-ion batteries, the method of increasing the difference of floatability of LiCoO2 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 LiCoO2 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%.
Keywords: spent lithium-ion battery; Co-enriched powder; floatation
文章编号：1008-5548（2016）01-0023-05
DOI：10.13732/j.issn.1008-5548.2016.01.006
收稿日期：2015-06-05， 修回日期：2015-07-02，在线出版时间：2016-02-22。
基金项目：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。
第一作者简介：张伟刚（1989—），男，硕士研究生，研究方向为二次资源回收利用。 E-mail:zhangwgcumt@163.com。
通信作者简介：何亚群（1963—），男，博士，教授，研究方向为矿物加工工程及二次资源循环利用。 E-mail: yqhe@cumt.edu.cn。
