金精矿中锑的脱除及回收利用

    Removal and Recycling of Antimony in a Gold Concentrate

    • 摘要: 本文对金精矿进行了碱浸预处理脱锑,并对脱锑液的回收利用进行了实验研究。实验确定了运用NaOH-Na2S工艺对金精矿中的锑进行了脱除,达到了降低金精矿中杂质元素锑的目的,确定了脱锑较佳工艺参数,即Na2S加入量为理论量的1.8倍、温度80 ℃、NaOH浓度16 g/L、液固比5∶1、时间60 min,在较佳工艺条件下锑脱除率可达98%。可运用中和沉淀法回收利用锑,也可运用氧化法从浸锑液中回收得到合格的锑盐产品,含锑可达49%。

       

      Abstract: In this article, antimony was removed from the gold concentratebythe alkali leaching method, and then the recovery of antimony solution was also studied. The test used NaOH-Na2S process to remove in gold concentrate, which achieved the purpose of reducing antimony in the gold concentrate, and determined the best process parameters for the antimony removal.The addition amount of Na2S is more than 1.8 times the theoretical amount, the temperature is 80 ℃, the NaOH concentration is 16 g/L, the liquid to solid ratio is 5∶1, the time is 60 min, and the removal rate can reach more than 98% at the optimal process conditions. Antimony can be recovered by neutralizing precipitation method, oxygen method can also be used from the antimony solution to obtain qualified antimony salt products, and the antimony content can reach more than 49%.

       

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