秘鲁某高硫选铁尾矿综合回收铜铁金银新工艺试验研究

秘鲁某选铁尾矿中铜品位0.83％,铁品位24.04％,同时伴生一定的金、银,具有较高的综合回收价值.由于该尾矿的脱硫泡沫中的硫被活化,受铜矿物中次生铜离子对硫的活化作用以及海水中各种离子对铜浮选的干扰,使得选铁尾矿的回收具有一定的难度.针对上述问题,在矿石工艺矿物学研究的基础上,通过工艺流程探索,采用优先选铜-粗精矿再...

Experimental study on a new process for comprehensive recovery of copper, iron, gold and silver from a high sulfur iron dressing tailings in Peru

There is 0.83% copper and 24.04% iron in an iron-dressing tailings from Peru, accompanied by certain amount of gold and silver, which has high comprehensive recovery value. The sulfur in the desulfurization foam contained in the tailings is activated, the influence of secondary copper ions in copper minerals on sulfur and the interference of various ions in seawater on copper flotation make the recovery of iron tailings have a certain difficulty. In view of the above problems, on the basis of ore process mineralogy research, through process flow exploration, the new process of preferential copper separation - coarse concentrate regrinding - iron separation from tailings - iron concentrate reverse flotation desulphurization was finally adopted. The closed circuit process test obtained the copper concentrate grade of 26.15%, copper recovery of 83.33%, gold content of copper concentrate of 2.14g/t. The gold recovery was 44.34%, containing silver 107.50 g/t, and silver recovery was 63.33%. The iron concentrate has a good grade of 68.32% and an iron yield of 5.4%, realizing the comprehensive utilization of secondary resources.