湿法冶金2025，Vol.44Issue(4)：448-458,11.DOI:10.13355/j.cnki.sfyj.2025.04.003
氨浸—离子交换树脂吸附法回收废旧锂电池中钴工艺研究
Recovering of Cobalt from Waste Lithium-ion Batteries by Ammonia Leaching—Ion Exchange Resin Adsorption Method
摘要
Abstract
In view of the problem of secondary environmental pollution caused by acid leaching system for recycling waste lithium cathode materials,a green leaching system for obtaining cobalt carbonate with high efficiency was studied.The cobalt from waste lithium batteries was recovered by ammonia leaching-ion exchange resin method.The results show that under the conditions of ammonia concentration of 5 mol/L,NH4Cl concentration of 0.7 mol/L,(NH4)2SO3 concentration of 0.5 mol/L,temperature of 140 ℃,liquid volume to solid mass ratio of 20 g/1 L and reaction time of 50 min,the leaching rates of Co,Li and Ni are 88.0％,90.0％and 92.5％,respectively.Under the condition of temperature of 20 ℃ and flow rate of 1 mL/min,150 mL of ammonia leaching solution is selectively adsorbed by 40 g CH-90 resin,and the adsorption capacity of Co is 9.06 mg/g.FT-IR,SEM and XPS characterization results show that cobalt is exchanged with Na+in the functional group of the resin and adsorbed on the resin in the form of[Co(NH3)i]2+.CoCO3 products with purity exceeding 97.5％are obtained by using sodium carbonate precipitation to recover cobalt carbonate,after elution,precipitation and impurity removal.关键词
锂电池/碳酸钴/氨浸/离子交换树脂/吸附/机制Key words
lithium battery/cobalt carbonate/ammonia leaching/ion exchange resin/adsorption/mechanism分类
矿业与冶金引用本文复制引用
李金蓉,刘翔,胡庆喜,李泽鹏,陈伟,陈永进..氨浸—离子交换树脂吸附法回收废旧锂电池中钴工艺研究[J].湿法冶金,2025,44(4):448-458,11.基金项目
蒸发结晶杂盐固废资源化工艺研究横向项目(D9214750). （D9214750）
