技术简介

锂辉石通过转型焙烧、酸化焙烧和浸出压滤后，锂以硫酸锂的形式进入溶液中，副产高硅锂渣用于水泥等建材行业。硫酸锂溶液经过多级净化除杂后，蒸发浓缩得到净化液，净化液与碳酸钠溶液混合沉淀、干燥后得到电池级碳酸锂。净化液经氢氧化钠转型冷冻结晶后，采用二次蒸发结晶，可以得到电池级氢氧化锂。

Introduction

After transformation roasting,acidizing roasting and leaching filter pressing of spodumene,lithium enters the solution in the form of lithium sulfate,and high-silicon lithium slag is used as a byproduct for cement and others in the building material industry.After multi-stage purification and impurity removal,the lithium sulfate solution is evaporated and concentrated to obtain a purified liquid,which is mixed with sodium carbonate solution for precipitation and drying to obtain battery-level lithium carbonate.Battery-level lithium hydroxide can be obtained by secondary evaporation and crystallization after the purified liquid is mixed with sodium hydroxide for freezing crystallization.