碳化分解法制备电池级碳酸锂  

Preparation of Battery-Grade Li_(2)CO_(3)by Carbonation and Decomposition

作　　者：赵峰 汪胜东 郭纵 谢思源 ZHAO Feng;WANG Shengdong;GUO Zong;XIE Siyuan(BGRIMM Technology Group,Beijing 100160,China)

机构地区：[1]矿冶科技集团有限公司,北京100160

出　　处：《有色金属(中英文)》2025年第2期255-260,共6页Nonferrous Metals

基　　金：国家重点研发计划项目(2021YFC2903204);1025专项(489);矿冶科技集团有限公司科研基金重点项目(02-2138)。

摘　　要：碳化分解法因具有反应高效、工艺简单等特点,已成为电池级碳酸锂生产的主流工艺。以盐湖碳酸锂为原料,采用碳化分解法净化精制电池级Li_(2)CO_(3)。考察了液固比、反应时间、CO_(2)气体流速、反应温度和搅拌速度对Li_(2)CO_(3)净化精制过程中纯度和产率的影响。结果表明:在CO_(2)气体流量1 L/min、室温(20℃)、L/S=25、碳化时间50 min和碳化搅拌速率300 r/min的条件下,碳酸锂纯度达99.80%,收率达到71.92%。满足了电池级Li_(2)CO_(3)的要求。The carbonation-decomposition method of lithium carbonate is characterized by its high reaction efficiency and simple process,making it the dominant approach for battery-grade Li_(2)CO_(3)production.Battery-grade Li_(2)CO_(3)was prepared by carbonation-decomposition using the salt lake Li_(2)CO_(3).The effects of liquid-solid ratio,carbonation time,CO_(2)gas flow rate,carbonation temperature,and stir speed on the purity and yield of battery-grade lithium carbonate were investigated.The results show that under optimal conditions that CO_(2)gas flow rate of 1 L/min,carbonation temperature of 20℃,liquid-solid ratio of 25∶1,carbonation time of 50 min,stir speed of 300 r/min,the purity and yield of Li_(2)CO_(3)reaches 98.80%and 71.92%,respectively.The properties of purified Li_(2)CO_(3)meet the requirement for use as a raw material in lithium-ion batteries.

关 键 词：盐湖碳酸锂 碳化分解法 电池级碳酸锂 净化工艺 

分 类 号：TQ131.11[化学工程—无机化工]