广西某低品位铜镍矿石选矿工艺研究

广西某低品位铜镍矿石含铜0.25%、含镍0.43%，镍主要以镍黄铁矿形式存在，铜主要以黄铜矿形式存在，铜、镍矿物均有一定程度氧化且关系密切。为了给该矿石的开发利用提供依据，对其进行了选矿工艺研究。通过对优先浮铜再浮镍方案、铜镍混合浮选方案、铜镍混合浮选再分离方案以及磁选-铜镍混合浮选方案的对比，决定采用铜镍混合浮选方案处理该矿石。按该方案进行详细的试验研究，结果表明，在-0.074 mm占74%的磨矿细度下，以碳酸钠为矿浆调整剂、丁黄药为捕收剂、2号油为起泡剂，经1粗选2扫选2精闭路浮选，可获得铜品位为5.77%、镍品位为8.31%、铜回收率为86.33%、镍回收率为76.60%的铜镍混合精矿。

Beneficiation Experiment on a Low-grade Copper-Nickel Ore from Guangxi

A low-grade copper-nickel ore in Guangxi contains Cu of 0.25% and Ni of 0.43%.Nickel mainly exists in the form of pentlandite，while copper in the form of chalcopyrite.Both copper and nickel minerals have a certain degree of oxidation and are closely disseminated.In order to provide a basis for the development and utilization of the ore，beneficiation experiments were carried out.By process comparison of copper flotation and then nickel，copper-nickel bulk flotation，bulk flotation of copper-nickel and then separation，magnetic separation-copper-nickel bulk flotation，the copper-nickel bulk flotation process was chosen to deal with the ore.The research by the process indicated that copper-nickel mixed concentrate with copper grade and recovery of 5.77% and 86.33%，nickel grade and recovery of 8.31% and 76.60% respectively were obtained at the grinding fineness of 74% passing 0.074mm，with sodium carbonate as regulator，butyl xanthate as collector，2# oil as frother，through the process flowsheet of one roughing，two-cleaning，and two-scavenging.