A novel process for extracting lithium from lepidolite
- 作者：Qunxuan Yan yanqunxuan@163.com ; Xinhai Li ; Zhoulan Yin ; Zhixing Wang ; Huajun Guo ; Wenjie Peng ; Qiyang Hu
- 关键词：Lepidolite ; Lithium ; Defluorination ; Lime&ndash ; milk ; Autoclave
- 刊名：Hydrometallurgy
- 出版年：2012
- 期刊代码：38_0304386x
- 类别：ce
- 出版时间：June, 2012
- 卷：121-124
- 期：Complete
- 页码：54-59
- 文件大小：661 K
摘要
A novel technique was developed to extract lithium from lepidolite.
The lepidolite was pre-roasted at a high temperature with water steam atmosphere for defluorination. Then the defluorinated lepidolite was leached in a lime-milk autoclave. Various parameters including the defluorination percentage of lepidolite, milling time, temperature, time, lime-to-defluorinated lepidolite ratio, and liquid-to-solid ratio in the leaching process were optimized. The lithium extraction efficiency can reach 98.9%under the optimal conditions. The purity of the lithium carbonate obtained can be up to 99.9%.