湿法冶金2024，Vol.43Issue(6)：630-639,10.DOI:10.13355/j.cnki.sfyj.2024.06.006
退役高镍锂电池的硫酸化焙烧—熟化酸浸综合回收工艺研究
Comprehensive Recovery of Decommissioned High-Nickel Lithium Battery by Sulphation Roasting Curing
摘要
Abstract
In order to comprehensively recover the valuable components from decommitted high-nickel ternary lithium batteries,lithium was selectively extracted by sulphation roasting and water leaching,and the water leaching residue was then processed by aging leaching,impurity removal and coprecipitation to prepare nickel-cobalt-manganese hydroxide.The results show that the optimum conditions of sulfation roasting are n(H2SO4)∶n(Li)=1.4∶1,roasting temperature of 600 ℃,roasting time of 1 h,and the water leaching rate of Li,Mn can reach 94.36％,11.03％,respectively,Ni and Co hardly leaching.Under the conditions of acid-ore ratio of 1.74,curing temperature of 120 ℃,curing time of 120 min and liquid volume to solid mass ratio of 7.5 mL/1 g,the aqueous leaching slag is cured and acid leaching.The leaching rates of Li,Ni,Co,Mn,Cu,Fe and Al are 97.86％,89.16％,95.09％,100％,63.6％,99.71％and 56.76％,respectively.Under the optimum conditions of pH=3.38,precipitation temperature of 60 ℃ and precipitation time of 60 min,the precipitation rates of Fe,Al and Cu in the solution can reach 100％,98.07％and 82.51％,respectively.Nickel cobalt manganese hydroxide can be formed by co-precipitation after pH adjustment.Under the optimal conditions of pH=9.44,co-precipitation temperature of 55 ℃ and co-precipitation time of 120 min,the precipitation rates of Ni,Co and Mn can reach 99.6％,100％and 98.72％,respectively.关键词
退役高镍锂电池/硫酸化焙烧/熟化/共沉淀/综合回收Key words
decommissioned high-nickel lithium battery/sulphation roasting/curing/co-precipitation/comprehensive recovery分类
矿业与冶金引用本文复制引用
黄燕婷,石鹏飞,曲鑫,常娣,张馨月,胡芳..退役高镍锂电池的硫酸化焙烧—熟化酸浸综合回收工艺研究[J].湿法冶金,2024,43(6):630-639,10.基金项目
国家自然科学基金青年基金资助项目(52204363). （52204363）
