有色金属(冶炼部分)

采用硫酸盐法综合回收锂云母中的锂、铷、铯。结果表明,以硫酸钾、硫酸钙、硫酸钡作为混合盐,锂云母与混合硫酸盐质量比为1∶0.45,在900℃焙烧1h后稀酸浸出,锂、铷、铯浸出率分别为92.2%、61.5%、63.8%。浸出液经净化除杂后,浓缩沉锂,可获得零级碳酸锂,沉锂母液可用于铷、铯回收。

Lithium,rubidium and cesium were extracted from lepidolite by sulfate process.The results show that leaching rate of lithium,rubidium and cesium is 92.2%,61.5%,63.8% respectively when lepidolite was mixed with 20% potassium sulfate,10%calcium sulfate and 15% barium sulfate,roasted at900 ℃ for one hour,and leached with dilute acid.Zero-grade lithium carbonate can be obtained from purified lixivium,and rubidium and cesium can be recovered from mother liquor of lithium precipitation.