研究Me(Ⅱ)-NH4Cl-NH3-H2O(MACA)体系处理兰坪低品位氧化锌矿的浸出过程,提出用循环浸出方法富集浸出液中锌浓度的工艺技术方案.结果表明:循环浸出的优化条件为液固比4:1、常温、搅拌速度300 r/min、浸出时间3 h;通过循环次数分别为14、15及10的3个阶段的循环浸出试验,获得渣计锌浸出率≥69%、浸出液锌浓度≥33 g/L的较好结果.该工艺具有流程简短、能耗低、净化容易、环境友好等优点,对低品位高碱性脉石难选氧化锌矿的开发利用具有重要意义.
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