新疆某铜镍尾矿综合利用选矿试验

新疆某铜镍尾矿中尚含有0.2%左右的镍、0.1%左右的铜，同时还含有17%左右的铁和3%左右的硫。镍主要以镍黄铁矿形式存在，铜主要以黄铜矿形式存在，铁主要以磁铁矿形式存在，硫主要以磁黄铁矿和黄铁矿形式存在。为了给该尾矿中这些有价成分的综合回收提供依据，对该尾矿进行了再选试验。结果表明：采用铜镍浮选-硫浮选-铁磁选-磁选精矿再浮选脱硫的工艺流程，并在铜镍粗选时采用旋流喷射浮选柱、在铜镍精选前和磁选精矿脱硫前采用再磨手段，最终可获得铜、镍品位分别为1.21%和2.72%，铜、镍回收率分别为12.30%和16.59%的铜镍混合精矿，以及铁品位为65.12%、铁回收率为26.96%的铁精矿和硫品位为35.73%、硫回收率为87.54%的硫精矿。

Comprehensive Utilization and Beneficiation Tests of a Copper-Nickel Tailing in Xinjiang

A copper-nickel tailing in Xinjiang still contains about Ni of 0.2%,copper of 0.1%,and iron of 17% and sulfur of around 3%.Nickel,copper and iron mainly exist in form of pyrite,chalcopyrite and magnetite respectively.Sulfur mainly exists in pyrrhotite and pyrite.In order to provide the basis for comprehensive recovery of valuable components in this tailing,re-concentration trials were carried out.The results showed that through the process of copper-nickel flotation-sulfur flotation-Fe magnetic separation-flotation desulfurization of magnetic concentrate,and additionally adopting the whirl jet-stream flotation column in rough copper-nickel separation,regrinding before clean concentration of copper and nickel and the sulfurization of magnetic concentrate,copper-nickel mixed concentrate with Cu and nickel grade of 1.21% and 2.72%,and copper and nickel recovery of 12.30% and 16.59% were finally obtained.As well,iron concentrate with Fe grade of 65.12% and Fe recovery of 26.96% and sulfur concentrate with S grade of 35.73% and S recovery of 87.54% were achieved separately.