柠檬酸环境破碎粒度对失效锂离子电池锂钴的浸出影响  

Effect of Crushing Particle Size for Leaching of Lithium and Cobalt with Citric Acid from Spend Lithium Ion Battery

作　　者：石贵明 周意超 朱浪 汪成东 Shi Guiming;Zhou Yichao;Zhu Lang;Wang Chengdong(School of Chemical Biology and Environment,Yuxi Normal University,Yuxi,Yunnan,China)

机构地区：[1]玉溪师范学院化学生物与环境学院,云南玉溪653100

出　　处：《矿产综合利用》2023年第5期70-74,共5页Multipurpose Utilization of Mineral Resources

基　　金：国家自然科学基金项目(51964044);云南省地方高校(部分)联合专项项目(2018FH001-051);云南省教育厅课题(2019J0738)。

摘　　要：这是一篇冶金工程领域的论文。研究了柠檬酸环境下破碎粒度和浸出条件对失效锂离子电池锂钴的浸出,为不同类型混合失效锂离子电池回收提供一定参考。结果表明:混合了不同类型的失效锂离子电池中金属含量占比较大的有Mn,Al,Ni,Co,Li,为简化回收工艺及Co、Li的回收价值较大,可只回收Co、Li。破碎粒度在-5 mm范围内对锂钴浸出率的影响较小,而较大破碎粒度浸出率不高可能是因为锂钴包裹在了颗粒中间而不能与浸出液接触而降低了浸出效果。针对混合了不同类型的失效锂离子电池而言,在-5 mm粒级下,柠檬酸浓度1.0 mol/L,浸出温度65℃,固液比1 g/100 mL,H_(2)O_(2)浓度3%,浸出时间55 min,搅拌速度30 r/min条件下进行浸出实验,获得锂浸出率97.86%,钴浸出率98.01%的较好浸出效果。This is an essay in the field of metallurgical engineering.The effects of crushing particle size and leaching conditions on the leaching of lithium cobalt from spend lithium-ion batteries in the citric acid environment were studied,which provided some reference for the recovery of different types of mixed spend lithium-ion batteries.The results showed that Mn,Al,Ni,Co and Li accounted for a large proportion of the contents in mixed different types of spend lithium-ion batteries.Due to the larger recovery value of Co and Li and simplify the recovery process,only Co and Li be recovered.The crushing particle size has little influence on the leaching rate of lithium cobalt in the range of-5 mm,while the leaching rate of lithium cobalt in the larger crushing particle size is not high,which may be lithium and cobalt wrapped in the middle of particles and cannot contact with the leaching solution,thus reducing the leaching effect.For mixed different types of spend lithium-ion batteries,under the conditions of-5 mm particle size,citric acid concentration 1.0 mol/L,leaching temperature 65℃,solid-liquid ratio 1 g/100 mL,H_(2)O_(2) concentration 3%,leaching time 55 min,stirring speed 30 r/min,the lithium leaching rate of 97.86%and cobalt leaching rate of 98.01%are obtained.

关 键 词：冶金工程 失效锂离子电池 破碎粒度 柠檬酸 回收 浸出 

分 类 号：TD983[矿业工程—选矿] TF843[冶金工程—有色金属冶金]