摘要
以吸附法盐湖卤水提锂溶液和碳酸钠为原料制备碳酸锂,研究了反应时间、锂质量浓度、反应温度、搅拌速度及洗涤条件对碳酸锂制备的影响。结果表明,以400 g/L碳酸钠溶液为沉淀剂,在锂质量浓度17.5 g/L,反应温度30℃,速度搅拌130 r/min条件下反应1 h可以得到颗粒粒径大且均匀的碳酸锂,锂沉淀率达到85%以上;采用三段逆流、V_(水)/V_(固)=2/1、温度80~90℃的水对沉淀洗涤,可得碳酸锂含量99%以上的产品,洗涤过程锂损失2%。
Lithium carbonate was prepared from lithium solution extracted from salt lake brine by adsorption method and sodium carbonate.Effects of reaction time,lithium concentration,reaction temperature,stirring speed and washing conditions on preparation of lithium carbonate were studied The results show that large and uniform particle size of lithium carbonate with precipitation rate of lithium of85% above can be obtained under the optimum conditions including 400 g/L sodium carbonate solution as precipitant,lithium mass concentration of 17.5 g/L,reaction temperature of 30℃,stirring speed of 130 r/min,and reaction time of 1 h.The products with lithium carbonate content of 99% and lithium loss in washing process of 2 % can be obtained by three-stage countercurrent precipitation washing with volume ratio of water to solid of 2:1,and washing temperature of 80-90℃.
作者
李存增
常华
LI Cun-zeng;CHANG Hua(Beijing Research Institute of Chemical Engineering and Metallurgy,CNNC,Beijing 101149,China)
出处
《有色金属（冶炼部分）》
CAS
北大核心
2021年第11期75-78,共4页
Nonferrous Metals（Extractive Metallurgy)
关键词
盐湖卤水
碳酸锂
液固比
逆流洗涤
salt lake brine
lithium carbonate
ratio of liquid to solid
countercurrent washing
