Efficient extraction and recovery of lithium from waste aluminum cryolite electrolyte
- 点击次数：
- 影响因子：13.716
- DOI码：10.1016/j.resconrec.2023.107070
- 发表刊物：Resources, Conservation & Recycling
- 关键字：Waste aluminum cryolite electrolyte；
Lithium recycling；
Sulfated roasting；
Calcine water-leaching；
Aluminum removal；
Lithium fluoride
- 摘要：The accumulation of alkali metals in cryolite electrolyte has negative impacts on the operation of aluminum electrolysis, and part of electrolytes need to be periodically replaced and discharged. A cleaner and efficient process was proposed to recover LiF and Al2(SO4)3 from the waste cryolite electrolyte. Under the optimum sulfated roasting conditions, 87.55% of Li and 30.30% of Al were leached. The obtained cryolite residue with a low molecular ratio could be returned to the aluminum electrolysis system. The addition of sodium benzoate achieved the efficient separation of Al3+ from Li-containing leachate, and the Al precipitation ratio was 99.78%. Acid leaching of the aluminum precipitate regenerated benzoic acid and recovered 99.62% of Al2(SO4)3. Finally high-purity cubic LiF was prepared from Li2SO4 solution, and the recovery of LiF was 98.78%.
- 论文类型：期刊论文
- 论文编号：107070
- 学科门类：工学
- 一级学科：冶金工程
- 文献类型：J
- 卷号：197
- 是否译文：否
- 发表时间：2023-05-29
- 收录刊物：SSCI、SCI、EI
