秘鲁某高硫选铁尾矿综合回收铜铁金银新工艺试验研究  

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

作　　者：包玺琳[1] 柏亚林[1] 杨俊龙[1] 郭艳华[1] 郭海宁[1] BAO Xilin;BAI Yalin;YANG Junlong;GUO Yanhua;GUO Haining(Northwest Research Institute of Mining and Metallurgy,Baiyin 730900,China)

机构地区：[1]西北矿冶研究院,甘肃白银730900

出　　处：《中国矿业》2022年第1期153-159,共7页China Mining Magazine

摘　　要：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-粗精矿再磨-尾矿再选铁-铁精矿反浮选脱硫的新工艺,闭路流程试验获得铜精矿铜品位26.15%,铜回收率83.33%,铜精矿中含金2.14 g/t,金回收率为44.34%,含银107.50 g/t,银回收率为63.33%;铁精矿铁品位68.32%,铁产率5.40%,铁回收率15.61%,铁精矿中硫含量0.19%。新工艺回收指标较好,实现了二次资源综合利用。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 is 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 2.14 g/t.The gold recovery is 44.34%,containing silver 107.50 g/t,and silver recovery is 63.33%.The iron concentrate has a good grade of 68.32%and an iron yield of 5.40%,the iron recovery of 15.61%and the content of S is 0.19%.The recovery index of the new process is good,and the comprehensive utilization of secondary resources is realized.

关 键 词：尾矿 高硫 次生铜 反浮选 

分 类 号：TD91[矿业工程—选矿] TF813[冶金工程—有色金属冶金]