储能科学与技术 ›› 2023, Vol. 12 ›› Issue (5): 1453-1460.doi: 10.19799/j.cnki.2095-4239.2023.0099

• 喜迎东北大学建校百年-储能电池关键材料与循环技术专刊 • 上一篇    下一篇

退役锂离子电池锂资源回收工艺

王海1,2,3(), 边煜华1, 王佳东2,3, 刘朝阳1, 张杰2,3, 姚健1, 高宣雯1(), 刘朝孟1, 骆文彬1   

  1. 1.东北大学冶金学院,辽宁 沈阳 110819
    2.银亿集团有限公司,浙江 宁波 315020
    3.广西银亿新材料有限公司,广西 玉林 537624
  • 收稿日期:2023-03-01 修回日期:2023-03-16 出版日期:2023-05-05 发布日期:2023-05-29
  • 通讯作者: 高宣雯 E-mail:545679042@qq.com;gaoxuanwen@mail.neu.edu.cn
  • 作者简介:王海(1978—),男,硕士,博士研究生,研究方向为能源材料回收,E-mail:545679042@qq.com
  • 基金资助:
    国家自然科学基金(52272194);“兴辽英才”青年拔尖(XLYC2007155);中央高校基本科研业务费(2025018)

Retired lithium battery recycling and battery-grade lithium carbonate preparation

Hai WANG1,2,3(), Yuhua BIAN1, Jiadong WANG2,3, Zhaoyang LIU1, Jie ZHANG2,3, Jian YAO1, Xuanwen GAO1(), Zhaomeng LIU1, Wenbin LUO1   

  1. 1.School of Metallurgy, Northeastern University, Shenyang 110819, Liaoning, China
    2.YinYi Group Co. Ltd. , Ningbo 315020, Zhejiang, China
    3.Guangxi Yinyi Advanced Material Company Limited, Yulin 537624, Guangxi, China
  • Received:2023-03-01 Revised:2023-03-16 Online:2023-05-05 Published:2023-05-29
  • Contact: Xuanwen GAO E-mail:545679042@qq.com;gaoxuanwen@mail.neu.edu.cn

摘要:

回收退役三元锂电池中的有价金属,可减少环境污染和缓解资源匮乏等问题。本研究通过一种先进、简单的前端提锂工艺,将拆解退役锂离子电池得到的正负极混合粉置于管式炉中,在750 ℃下对管式炉维持一定的压力并持续通入二氧化碳焙烧1 h,焙烧后得到含锂焙烧粉。再往焙烧粉中加入一定量的水制成浆料,并持续性通入二氧化碳气体,经固液分离后得到含碳酸氢锂的溶液,再将溶液经加热分解后制备得到纯度为99.5%的电池级碳酸锂。整套工艺锂综合浸出率可达99.05%,回收率可达99%,在实现高回收率的基础上兼具成本低效益高的优势,为目前较为先进的回收技术之一,能够有效解决目前锂回收难、回收成本高、经济效益差的问题。

关键词: 退役三元锂电池, 资源回收, 电池级碳酸锂

Abstract:

Recycling valuable metals from used ternary lithium batteries can reduce environmental pollution and alleviate problems such as resource scarcity. Herein, an advanced and simple front-end lithium extraction process provides positive and negative mixing powder from dismantling used lithium-ion batteries using a tube furnace. The tube furnace is maintained at a certain pressure and continuously fed with carbon dioxide to roast at 750 ℃ for 1 h. Then a certain amount of water is added to the roasted powder to make a slurry, continuously passing carbon dioxide gas after solid-liquid separation to obtain a lithium bicarbonate solution. Then the solution is heated and decomposed to obtain 99.5% purity of battery-grade lithium carbonate. The overall lithium leaching rate and the recovery rate can reach 99.05% and 99%, respectively, which is one of the most advanced recovery technologies and can effectively solve the problems of difficult lithium recovery, high recovery cost, and poor economic efficiency.

Key words: retired lithium battery, recycling, battery-grade lithium carbonate

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