某含金银铜硫矿石的低碱铜硫分离与伴生金银综合回收

Separation of low alkali copper and sulfur and comprehensive recovery of associated gold and silver from a gold,silver,copper and sulfur ore

某含金银铜硫矿石中铜、硫、金、银品位分别为0.70%、4.76%、0.10 g/t和3.78 g/t,针对现场高碱工艺存在的伴生金银损失率高等问题,以该矿石为研究对象,采用低碱度条件下“铜快速浮选—铜尾活化选硫”的工艺流程进行了系统的浮选试验研究。闭路试验结果表明,最终可获得铜品位为24.28%、回收率为91.93%的铜精矿以及硫品位为45.54%、回收率为44.76%的硫精矿。其中61.51%的金和63.86%的银在铜精矿中获得富集,浮选指标较好,在低碱条件下原矿实现了有价金属的综合回收。

The grade of copper,sulfur,gold and silver in a gold-silver-copper-sulfur ore is 0.70%,4.76%,0.10g/t and 3.78g/t,respectively.The ore was taken as the research object in this paper where flotation experiments were systematically carried out with the process of“copper rapid flotation-copper tail activation sulfur separation”under the condition of low slurry alkalinity to reduce the high loss rate of associated gold and silver which was a problem encountered in actual production with high pulp alkalinity process.The closed-circuit test results showed that the copper concentrate and sulfur concentrate could be obtained.The former has copper grade of 24.28%with recovery of 91.93%and the latter has sulfur grade of 45.54%with recovery of 44.76%.Copper concentrate was enriched in 61.51%of gold and 63.86%of silver with good flotation index,and comprehensive recovery of valuable metals was realized in raw ore under low alkali condition.