复杂多金属尾矿伴生金银铁综合回收试验研究

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%和72.13%,并获得TFe品位为62.01%,TFe回收率为11.04%,含硫量为0.25%磁铁精矿,及TFe品位为45.30%,TFe回收率为18.54%铁精矿产品。

Experimental study on comprehensive recovery of gold, silver and iron associated with complex polymetallic tailings

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 first and then 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 obtained TFe grade of 62.01%, TFe recovery rate of 11.04%, magnetite concentrate with sulfur content of 0.25%, and TFe grade of 45.30%, TFe recovery rate of 18.54% iron concentrate products.