摘要
本文以三元极片黑粉和三元电池黑粉为原料,以氢气为还原剂,采用还原焙烧+优先提锂工艺对锂进行回收。实验结果表明,以三元极片黑粉为原料,还原气流量为150L·min^(-1),还原温度为450℃,隧道炉还原段的停留时间为1.5h,冷却段的停留时间为2.5h,去离子水为浸出剂,液固比为5∶1,浸出时间为1h,浸出温度为80℃时,锂的浸出率达到93.3%。以三元电池黑粉为原料,在同等条件下,锂的浸出率仅有34.4%。采用稀酸浸出,锂的浸出率可提升至61.1%,同时锰的浸出率达到了18.6%,导致锂的选择性降低。通过预先除铝,在同等条件下,锂的浸出率提升至72.2%。
This article focuses on the recovery of lithium from ternary cathode scrap black powder and ternary battery black powder,using hydrogen as the reducing agent and employing a reduction roasting+priority lithium extraction process.The results showed that using termnary cathode scrap black powder as raw material,with the reducing gas flow rate of 150L/min,reducing temperature of 450℃,tunnel furace reduction section residence time of 1.5h,cooling section residence time of 2.5h,deionized water as leaching agent,liquid-solid ratio of 5:1,leaching time of 1h,leaching temperature of 80℃,the lithium leaching rate reached 93.3%.When using ternary battery black powder as raw material,under the same conditions,the lithium leaching rate is only 34.4%.By using dilute acid leaching,the leaching rate of lithium could be increased to 61.1%,but at the same time,the leaching rate of manganese reaches 18.6%,resulting in a decrease in lithium selectivity.By pre-removing aluminum,the leaching rate of lithium was increased to 72.2%under the same conditions.
作者
余湛
YU Zhan(Hunan Jiangye New Energy Technology Co.,Ltd.,Changsha 410000,China)
出处
《化工技术与开发》
2025年第11期96-99,共4页
Technology & Development of Chemical Industry
关键词
三元极片黑粉
三元电池黑粉
氢气还原
优先提锂
ternary cathode scrap black powder
ternary battery black powder
hydrogen reduction
priority lithium extraction
