盐湖卤水碳酸锂提取工艺过程研究  

Research on extraction process of lithium carbonate from salt lake brine

作　　者：李燕茹[1] 袁建军[1] 朱亮[1] 沙作良[1] 杨美洁[1] 左癑华 

机构地区：[1]天津科技大学天津市海洋资源与化学重点实验室,天津300457

出　　处：《无机盐工业》2013年第7期12-14,共3页Inorganic Chemicals Industry

基　　金：国家自然科学基金资助项目(21076157);天津市自然科学基金资助项目(12JCZDJC28200);天津市自然科学基金资助项目(12JCZDJC30000)

摘　　要：青藏高原的盐湖卤水锂储量丰富,通过盐田蒸发浓缩,去除卤水中的绝大部分Na+、K+、SO42-、Cl-、Mg2+,可以使镁锂比降到8～12,锂离子质量分数也可达到0.5%以上。以蒸发浓缩后的富锂卤水为原料,选用碳酸钠和氢氧化钠为沉淀剂分两步沉淀除镁,之后用碳酸钠为沉淀剂提锂,通过对此工艺过程中的各个阶段进行实验,最终可以得到纯度和收率较高的粗级碳酸锂产品。The salt lake brine in Tibetan Plateau has a rich lithium reserves.After the process of evaporation in the salt pan,the most impurities,such as Na＋,K＋,SO42-,Cl-,and Mg2＋in the brine can be removed.At the same time,the ratio of Mg/Li is decreased to the range of 8～12 and the mass fraction of lithium ion can be concentrated to over 0.5%.The magnesium ions in the evaporated lithium-rich brine are precipitated with the sodium carbonate and sodium hydroxide as precipitators,and then the lithium is extracted with sodium carbonate as precipitator.After a series of experiments in all the stages of the process,coarse lithium carbonate with relatively higher purity and yield is finally obtained.

关 键 词：盐湖卤水 提锂工艺 沉淀法 碳酸锂 

分 类 号：TQ131.11[化学工程—无机化工]