黄金科学技术 ›› 2023, Vol. 31 ›› Issue (4): 689-697.doi: 10.11872/j.issn.1005-2518.2023.04.064
摘要:
贵州某卡林型金矿原矿金品位较低,有用矿物与脉石矿物嵌布粒度细,有害元素As和C含量较高,常规细磨浮选工艺金回收率仅为80.54%,尾矿金品位为0.97×10-6,浮选尾矿金损失较为严重。为了提高金精矿回收率,降低浮选尾矿金品位,开展了工艺矿物学及精锐微泡浮选工业试验研究。结果表明:常规细磨浮选尾矿中损失的金主要以-38 μm粒级的贫连生体形式损失,且金含量较高。常规细磨浮选无法捕收的微细颗粒矿物,是造成浮选尾矿金损失的主要原因。采用精锐微泡浮选技术对扫选Ⅳ的尾矿进行再选试验,结果表明:精锐微泡浮选对尾矿中-38 μm粒级的微细颗粒矿物有显著捕收效果,工艺优化后,金累计回收率为82.39%,提高了1.85个百分点,尾矿金品位为0.88×10-6,降低了0.09×10-6,浮选指标逐渐转好,提升了企业经济效益。
中图分类号:
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