攀西某铜镍混合精矿浮选分离试验

攀西某铜镍矿选矿厂的铜镍混合精矿铜、镍品位分别为3.60%和7.91%，铜镍主要以硫化物形式存在，铜镍矿物嵌布关系密切、嵌布粒度微细，浮选分离难度较大。为高效分离该铜镍混合精矿，在再磨、脱药的基础上进行了抑镍浮铜试验。结果表明，试样加活性炭和硫化钠磨矿后（磨矿细度为-0.026 mm占76%）浓缩脱药，采用1粗3精2扫、中矿顺序返回流程处理，可获得铜品位为28.88%、含镍0.78%、铜回收率为84.55%的铜精矿和镍品位为8.75%、含铜0.62%、镍回收率为98.96%的镍精矿，较好地实现了铜镍混合精矿的分离。

Experiment on Flotation Separation of a Copper-nickel Mixed Concentrate from Western Panzhihua

A Cu-Ni mixed concentrate from Western Panzhihua contains 3.60% Cu，7.91% Ni.Copper and nickel mainly exist in form of sulfide minerals.Copper and nickel are micro-fine disseminated and closely associated with each other，thus difficult to be separated by flotation.In order to improve the flotation separation efficiency，experiments on copper flotation and nickel depression were carried out after being reground and reagent removal.The results indicated that：after grinding the ore (at grinding fineness of -0.026 mm passing 76%) with active carbon and sodium sulfide and removing the reagents，through the process of one roughing，three cleaning，two scavenging and middles back to the flow-sheet in turn，copper concentrate with 28.88% Cu，0.78% Ni and copper recovery of 84.55%，nickel concentrate with 8.75% Ni，0.62% Cu and nickel recovery of 98.96% were obtained respectively.In conclusion，good separation of Cu-Ni mixed concentrate was obtained.