复杂多金属尾矿伴生金银铁综合回收

Comprehensive recovery of gold,silver and iron associated with complex polymetallic tailings

为综合回收某复杂多金属浮选尾矿中伴生的金银铁,分别开展了磁选、全泥氰化浸出、反浮选试验研究。结果表明,优先采用强磁预选抛尾的方法对含铁矿物进行富集,再采用先回收金银后选铁的方案较好。矿石在“强磁抛尾—全泥氰化浸出—弱磁选铁—强磁选铁—磁铁精矿反浮选脱硫”的联合工艺下,金、银浸出率分别达85.32%、72.13%,并获得TFe品位为62.01%、TFe回收率为11.04%、含硫量为0.25%的磁铁精矿及TFe品位为45.30%、TFe回收率为18.54%的铁精矿产品。

In order to comprehensively recover the gold,silver and iron associated with a complex polymetallic flotation tailings,magnetic separation,full-slime cyanidation leaching and reverse flotation were carried out,respectively.The results show that it is better to use the strong magnetic pre-selection tail-throwing method to enrich iron-bearing minerals first,and then use the scheme of recovering gold and silver and selecting iron.Under the combined process of“strong magnetic tail throwing-full mud cyanidation leaching-weak magnetic iron separation-strong magnetic iron separation,reverse flotation desulfurization of magnetite concentrate”,the leaching rates of gold and silver reached 85.32%and 72.13%,respectively.And magnetite concentrate with TFe grade of 62.01%,TFe recovery rate of 11.04%sulfur content of 0.25%,and iron concentrate products with TFe grade of 45.30%,and TFe recovery rate of 18.54%were obtained.