碳化分解法提纯碳酸锂的研究

来源期刊：有色金属科学与工程2013年第2期

论文作者：汪发波 王林生 文小强

文章页码：41 - 45

关键词：碳化分解法；碳酸锂；提纯；影响因素

Key words：carbonation-decomposition method; lithium carbonate; purification; influence factors

摘    要：采用碳化分解法对工业级碳酸锂（99.0 %）进行提纯处理，实验主要介绍了碳化分解法提纯Li2CO3的工艺过程，并分别研究了碳化温度、固液比(指固体Li2CO3的质量与去离子水的体积比，单位g/mL,下同)、碳化时间等因素对Li2CO3纯度和回收率的影响，确定了最佳工艺条件：碳化温度为28 ℃、固液比为1/40、碳化时间为2.0 h、碳化搅拌速率为300 r/min，在此条件下，提纯制备的Li2CO3纯度达99.60 %以上，回收率达70.0 %，满足电池级碳酸锂的要求.

Abstract: This paper introduces purified treatment of the industrial-grade lithium carbonate (99.0 %) by carbonate-decomposition method. The experiment mainly introduces the process of purifying of Lithium Carbonate by carbonation-decomposition method, influencing factors of purity and the rate of recovery of lithium carbonate, such as carbonization temperature, the ratio of solid phase and liquid phase, and carbonization time; and works out the best process conditions: carbonization temperature 28 ℃, the ratio of solid phase and liquid phase 1/40, and carbonization time2.0 h, mixing rate of carbonation 300 r/min. Under these conditions, the purity of prepared lithium carbonate can reach more than 99.60 %, and the rate of recovery can reach 70.0 %, with which the requirements of battery grade lithium carbonate are met.