山东某复杂多金属矿分选精矿中金、银的回收工艺

    Recovery Process of Gold and Silver from a Mixed Ore Concentrate in Shandong Province

    • 摘要: 【方法】针对山东某混合矿的不同精矿中金、银的分布差异,旨在研究并实现不同精矿中金、银的有效分离与回收。【目的】对分选精矿中Au、Ag的走向进行了分析,查明了Au、Ag在各分选精矿中的分布情况,并针对硫精矿、磁铁精矿及强磁产品开展了金、银回收实验,提出了合理的回收工艺。【结果】硫精矿和磁铁精矿含Au分别为2.03 g/t和1.11 g/t,硫精矿含Ag 30.54 g/t,具有较高的回收价值;强磁产品含Au 0.46 g/t,需要进一步富集后才能回收;磁铁精矿和强磁产品中Ag较低,回收价值不大。经实验针对硫精矿、磁铁精矿和强磁产品分别确定了“焙烧-氰化浸出”、“直接氰化浸出”和“浮选富集”的工艺流程。硫精矿采用“焙烧-氰化浸出”工艺获得了Au、Ag回收率分别为20.37%、15.25%的贵液;磁铁精矿采用“直接氰化浸出”工艺获得了Au、Ag回收率分别为10.63%、1.86%的贵液;强磁产品采用“浮选”工艺获得了Au、Ag回收率分别为3.31%和2.00%的浮选精矿。【结论】经上述工艺组合,实现了Au和Ag总回收率分别为87.94%和74.09%的指标。

       

      Abstract: Objective In view of the distribution differences of gold and silver in different concentrates of a certain mixed ore in Shandong, the aim is to study and achieve the effective separation and recovery of gold and silver in different concentrates. Method The trend and the distribution of Au and Ag in each separation concentrate was found. The Au and Ag recovery tests were carried out for sulfur concentrate, magnet concentrate and high magnetic products, and the reasonable recovery process was put forward to. ResultThe Au content of sulfur concentrate and magnet concentrate is 2.03 g/t and 1.11 g/t, respectively, and the Ag content of sulfur concentrate is 30.54 g/t, which has a high recovery value. The strong magnetic product contains Au 0.46 g/t, which needs to be further enriched before recovery. Ag in magnetite concentrate and strong magnetic product is low, and the recovery value is not great. The technological processes of "roasting-cyanide leaching", "direct cyanide leaching" and "flotation enrichment" were determined respectively for sulfur concentrate, magnet concentrate and strong magnetic product. The recovery of Au and Ag was 20.37% and 15.25% respectively by the roasting cyanide leaching process. The recovery of Au and Ag was 10.63% and 1.86% respectively by the direct cyanide leaching process. Conclusion The flotation concentrate with recovery of Au and Ag of 3.31% and 2.00%, respectively was obtained by the flotation process. The total recovery of Au and Ag was 87.94% and 74.09%, respectively.

       

    /

    返回文章
    返回