某黏土型锂矿中锂浸出试验研究

Experimental study on the leaching of lithium in a clay type lithium ore

贵州某锂绿泥石为典型黏土型锂矿,以该矿石为研究对象,对其进行焙烧—浸出试验研究。考察磨矿细度、焙烧温度、焙烧时间、浸出温度、浸出时间、振荡频率及浸出液固比对锂浸出率的影响。研究结果表明:在磨矿细度为-0.038 mm占89%,硫酸用量为0.8 kg/t、焙烧温度为400℃、焙烧时间为1 h,浸出温度为80℃、浸出时间为1 h、振荡频率为150 r/min、浸出液固比4∶1的条件下,锂浸出率为97.31%,浸出效果较好,对该锂绿泥石开发利用具有重要意义。

A cookeite in Guizhou is a typical clay type lithium ore and was selected as the research object for a study on roasting-leaching experiments.The effects of grinding fineness,roasting temperature,roasting time,leaching temperature,leaching time,oscillation frequency,and liquid-solid ratio on lithium leaching rate were investigated.The results showed that under the conditions of grinding fineness of-0.038 mm accounting for 89%,sulfuric acid dosage of 0.8 kg/t,roasting temperature of 400°C,roasting time of 1 h,leaching temperature of 80°C,leaching time of 1 h,oscillation frequency of 150 r/min,and liquid-solid ratio of 4∶1,the lithium leaching rate reached 97.31%.The leaching effect was excellent,and this study has significant implications for the development and utilization of the cookeite.