利用副产硅渣提取钾、锂

Extraction of Lithium and Lithium Sulfate from Silicon by-product

锂云母硫酸法生产碳酸锂副产硅渣,经洗涤与中和后产品合格;滤液加碱回收铝和锂,提锂母液再利用Na^+、K^+∥Cl^-、SO_4^(2-)—H_2O四元水盐体系相图原理回收氯化钠和硫酸钾。

Lepidolite and sulfuric acid was useed to produce lithium carbonate and by - prod- uct silica residue, which was washed and neutralized the silica residue to get neutral product. The base was added in the filtrate to get aluminium hydroxide and lithium carbonate. Then the remaining mother liquor was used to produce sodium chloride and potassium sulfate by using the theory of phase diagram of Na＋、K＋//Cl、SO2-^4-H2O.