摘要
硫酸镁亚型盐湖提取锂时,由于卤水中镁含量很高,造成镁锂分离困难。碳酸盐型盐湖在锂的开发利用过程中,受到碳酸根浓缩的影响,锂离子不能高度富集。通过把两种类型的卤水进行兑卤,析出大量三水合碳酸镁,基本去除体系内镁离子和碳酸根,卤水体系得到简化,得到锂含量较高的富锂卤水,富锂卤水通过添加碳酸钠析出品位较高的碳酸锂,锂的单次收率在80%以上。该方法既解决了硫酸盐型卤水镁锂分离的问题,也解决了碳酸盐型卤水锂的富集问题。
At present, the separation of magnesium and lithium in sulfate-type salt lakes with high magnesium content is a dif- ficult technical problem.ln addition ,lithium can＇t be highly enriched with the increasing concentration of carbonate ions dur- ing exploiting lithium from carbonate-type salt lakes.In this research, the brines from sulfate-type salt lake and carbonate-type salt lake were mixed to separate out large amount of magnesium carbonate trihydrate, so that the magnesium and carbonate ions could be basically removed, and the brine system could be simplified.Therefore, the lithium rich brine could be obtained and high grade lithium carbonate could be separated out by adding sodium carbonate into it.The single lithium yield was over 80%.The method both solved magnesium-lithium separation and lithium enrichment problems of sulfate-type and carbonate- type salt lakes.
出处
《无机盐工业》
CAS
北大核心
2013年第6期27-29,共3页
Inorganic Chemicals Industry
关键词
混合兑卤
碳酸锂
盐湖开发
mixed brine
lithium carbonate
salt lake development
