盐湖原卤提锂研究进展

Research Progress of Lithium Extraction from Raw Brine in Salt Lake

近年来随着新能源汽车和储能电池的迅速发展,锂产品的消耗量日益增大,锂资源的开发与利用受到了高度的关注。目前已工业化提锂方法生产周期长、锂综合回收率低,盐湖提锂产量增长缓慢,难以满足我国新能源产业发展需求。从低锂原卤中直接提锂,可实现低品位锂资源高效利用,对于提高我国战略锂资源的供应具有重要意义。本文根据我国卤水资源特点,概述了可适用于低锂浓度、高镁锂比原卤提锂的吸附法、膜分离法、萃取法以及其他方法,分析了不同技术方法的提锂特点及效果,展望了低锂浓度、高镁锂比原卤提锂技术发展趋势。

In recent years,with the rapid development of new energy vehicles and energy storage batteries,the consumption of lithium products is increasing,the development and utilization of lithium resources has received a high degree of attention.The currently industrialized lithium extraction method has a long production cycle,low lithium recovery rate,and a slow growth in lithium production,which is difficult to meet the needs of China's new energy industry development.Direct extraction of lithium from low-lithium brine can realize the efficient utilization of low-grade lithium resources,which is of great significance for improving the supply of strategic lithium resources in China.Based on the characteristics of brine resources,this paper summarizes the adsorption,membrane separation,solvent extraction and others methods,which applicable to the extraction of lithium from low lithium concentration and high magnesium lithium ratio of raw brine.The characteristics and effects of various lithium extraction methods were analyzed.The development trend of extracting lithium from brine with low lithium concentration and high magnesium lithium ratio is expected.