碳热还原—两步浸出法回收退役三元锂电池中的锂OA
Recovery of Lithium from Retired Ternary Lithium Batteries by Carbothermal Reduction—Two-step Leaching Method
研究了采用碳热还原—两步浸出(水浸-酸浸)工艺从退役三元锂电池中选择性回收锂.分别考察了碳热还原和浸出试验条件对锂浸出效果的影响.结果表明:将电池正极粉与活性炭按碳质量分数27％的比例复配,在600 ℃下恒温焙烧90 min后,将焙烧产物与超纯水按固液质量体积比1/18搅拌混合,再滴加理论用量83％的硫酸,之后在65 ℃下浸出20 min,锂浸出率达98％以上,而镍、钴、锰浸出率均小于5％,锂回收效果较好.
The selective recovery of lithium from retired ternary lithium batteries by carbothermal reduction-two-step leaching(water leaching-acid leaching)process was studied.The effects of carbothermal reduction and leaching test conditions on lithium leaching were investigated.The results show that the cathode powder and activated carbon are compounded according to the ratio of carbon mass fraction of 27％.After roasting at 600℃ for 90 min,the roasting product is mixed with ultrapure water according to the solid-liquid mass volume ratio of 1/18,and then 83％of the theoretical amount of sulfuric acid is added dropwise.After leaching at 65℃ for 20 min,the lithium leaching rate is more than 98％,while the leaching rates of nickel,cobalt and manganese are less than 5％,and the lithium recovery effect is better.
张敏;吴晓倩;陈明;李洪博;胡振光
桂林理工大学化学与生物工程学院,广西 桂林 541006桂林理工大学化学与生物工程学院,广西 桂林 541006陕西有色金属技术研究院有限公司,陕西西安 710000广西智亮新材料股份有限公司,广西南宁 530000桂林理工大学化学与生物工程学院,广西 桂林 541006
矿业与冶金
退役三元锂电池锂碳热还原硫酸浸出回收
retired ternary lithium batterylithiumcarbothermal reductionsulfuric acidleachingrecovery
《湿法冶金》 2026 (3)
308-316,9
广西壮族自治区科技计划项目(桂科AB24010018).
评论