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Minerals 2015, 5(4), 737-743; https://doi.org/10.3390/min5040521

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

Department of Energy & Resources Engineering, Kangwon National University, Chuncheon, Kangwon-do 200-701, Korea
Academic Editor: William Skinner
Received: 11 October 2015 / Revised: 8 November 2015 / Accepted: 10 November 2015 / Published: 16 November 2015
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Abstract

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. View Full-Text
Keywords: lepidolite; sodium sulfide; mixed grinding; lithium; water leaching lepidolite; sodium sulfide; mixed grinding; lithium; water leaching
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Lee, J. Extraction of Lithium from Lepidolite Using Mixed Grinding with Sodium Sulfide Followed by Water Leaching. Minerals 2015, 5, 737-743.

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