湿法冶金2024，Vol.43Issue(6)：646-651,6.DOI:10.13355/j.cnki.sfyj.2024.06.008
粉煤灰中锂元素的浸出及动力学研究
Leaching and Kinetic of Lithium Element from Waste Coal Fly Ash
摘要
Abstract
The extraction of lithium from fly ash by roasting activation with sodium carbonate and leaching with sulfuric acid was studied.The effects of mass ratio of fly ash to sodium carbonate,roasting temperature,roasting time,liquid-solid mass ratio,sulfuric acid concentration,acid leaching temperature and acid leaching time on the leaching rate of lithium were investigated.The dynamic analysis of the leaching process was carried out by using the core-shrinkage model.The results show that under the condition of 800 ℃,fly ash and sodium carbonate are mixed and roasted for 180 min according to the mass ratio of 1∶1,and then leaching with 2 mol/L sulfuric acid at 90 ℃ for 120 min,remarkable leaching effect can be obtained,and the leaching rate of lithium can reach 99.97％,the leaching process is mainly controlled by diffusion.The study has a certain guiding significance for the leaching and recovery of lithium from solid waste resources.关键词
粉煤灰/锂/提取/焙烧/活化/硫酸/浸出/动力学Key words
fly ash/lithium/extraction/roasting/activation/sulfuric acid/leaching/dynamics分类
矿业与冶金引用本文复制引用
王沙,秦伟,韩雪,王钧伟..粉煤灰中锂元素的浸出及动力学研究[J].湿法冶金,2024,43(6):646-651,6.基金项目
国家自然科学基金资助项目(51404014) （51404014）
安徽省高校自然科学研究重点项目(KJ2020A0494). （KJ2020A0494）
