Extraction of Lithium from Lepidolite Using Mixed Grinding with Sodium Sulfide Followed by Water Leaching

Minerals

Jaeryeong Lee¹ 

[1] Department of Energy & Resources Engineering, Kangwon National University, Chuncheon, Kangwon-do 200-701, Korea

关键词: lepidolite;    sodium sulfide;    mixed grinding;    lithium;    water leaching;   

DOI  :  10.3390/min5040521

来源: mdpi

【 摘 要 】

Mixed grinding with Na₂S followed by water leaching was performed to extract Li from lepidolite. The leachability of Li increases dramatically in the ground mixture, regardless of the mixing ratio over the range of 1:1 to 3:1, while only 4.53% of Li was extracted in lepidolite ground without Na₂S. The leachability increased with an increase of the grinding time, and ultimately, 93% of the Li was leached by water from the ground mixture with a weight ratio of 3:1 (Na₂S:Lepidolite). In the process of the mixed grinding, the Li-contained lepidolite was destructured crystallographically, and it might have changed to different compounds. This process enables us to extract Li from lepidolite via a water leaching treatment.

【 授权许可】

CC BY   
© 2015 by the author; licensee MDPI, Basel, Switzerland.