某微细浸染型难处理金矿石选矿工艺试验研究
Experimental study on the beneficiation of a micro-fine grain disseminated refractory gold ore
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摘要: 某微细浸染型难处理金矿石金品位5.08 g/t,金矿物以包裹金为主,且粒度分布不均匀。针对该矿石性质,进行了重选、浮选、氰化浸出工艺试验。结果表明:采用单一浮选工艺,金回收指标不理想;采用重选—重选尾矿浮选工艺,金综合回收率为86.45%;对重选—重选尾矿浮选得到的尾矿进行氰化浸出,金综合回收率可提高至94.55%;采用联合工艺流程处理该矿石是可行的,可获得较好试验指标。Abstract: The gold grade is 5.08 g/t, the gold minerals are mainly inclusion gold and the grains are in uneven distribution in a micro-fine grain disseminated refractory gold ore. Based on the ore property, experiments of gravity, flotation and cyanidation processes are carried out. The results show that flotation alone fails to obtain satisfactory gold recovery index; gravity-gravity tailings flotation process obtains gold comprehensive recovery rate 86.45%; gravity-cyanidation of flotation tailings of gravity tailings obtains gold comprehensive recovery rate up to 94.55%; joint process for ore treatment is feasible and can obtain good test index.
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