偏析法提纯高锂钾盐电解质体系的探索与实践

Exploration and Practice on Purification of Electrolyte System with High Lithium Potassium Salt by Segregation Method

随着近年来国内高品位铝土矿资源的逐渐减少,低品位铝矿石的综合利用技术已广泛应用到工业化氧化铝生产中。但其杂质含量较高,致使国内部分地区的铝土矿生产的氧化铝含有较高的锂、钾等成分,长期使用会导致工业电解质中的锂盐和钾盐的大量富集,电解槽出现效率低、电耗高、难控制、稳定性差等现象。目前,高锂、高钾电解质体系先后在甘肃、青海、山西等省区的电解铝厂出现,此电解质体系已经影响到该地区电解铝企业的正常生产。该文主要阐述偏析法提纯高锂高钾盐电解质体系过程中进行的探索和实践,经试验成功后在电解系列逐步推广。

With the decrease of domestic high grade bauxite resources in recent years,the comprehensive utilization technology of low grade bauxite has been widely used in industrial alumina production.But its impurity content is high,which causes the alumina produced by bauxite mines in some parts of China to contain high content of lithium and potassium.long-term use will lead to a large amount of enrichment of lithium and potassium salts in industrial electrolytes low efficiency,high power consumption,difficult to control,poor stability and other phenomena occur in electrolyzes.At present,high-lithium and high-potassium electrolyte systems have appeared in electrolytic aluminum plants in Gansu,Qinghai and Shanxi provinces,which have affected the normal production of electrolytic aluminum enterprises in the region.Based on this,this paper mainly introduces the exploration and practice in the process of purifying high-lithium and high-potassium salt electrolyte system by segregation method.