某难选微细粒铜镍硫化矿选矿新工艺研究

New Beneficiation Technique for Certain Refractory Fine Copper-Nickel Sulfide Ore

为综合回收某难选微细粒铜镍硫化矿,采用铜镍等可浮浮选工艺对其进行了选矿试验研究。结果表明,在-0.074 mm粒级占80%的磨矿细度下以高选择性的铜矿物捕收剂ZP-02预先浮选铜矿物及部分连生交代、可浮性好的镍矿物,获得的粗精矿精选后以石灰作抑制剂进行铜镍分离,浮铜尾矿以硫酸铜作活化剂、丁基黄药作捕收剂浮选镍矿物,获得了良好的试验指标。采用铜镍等可浮浮选工艺获得了含铜21.57%、含镍0.86%、铜回收率为71.18%的铜精矿,含镍5.57%、含铜0.44%、镍回收率为25.26%的镍精矿1和含镍5.68%、含铜0.34%、镍回收率50.06%的镍精矿2,解决了传统工艺分选该铜镍矿石指标差的难题。

A new approach of copper-nickel iso-flotation was introduced to recover a certain refractory fine-grained Cu-Ni ore. In the test,with a grinding fineness of- 0. 074 mm 80%,copper minerals and a portion of contact metasomatic nickel minerals with good flotability was recovered by ZP-02,a copper mineral collector with high selectivity. Then,after a further cleaning of this bulk concentrate,copper and nickle minerals were separated with lime as the depressant,and nickel minerals was well reclaimed from the copper-flotation tailings with cupric sulfate as the activator and butyl xanthate as the collector. Results showed that a copper concentrate was obtained with copper and nickel content of21. 57% and 0. 86%,respectively,at the copper recovery of 71. 18%,while a nickel concentrate №1 with nickel and copper content of 5. 57% and 0. 44%,respectively,at the nickel recovery of 25. 26%,and a nickel concentrate №2with nickel and copper content of 5. 68% and 0. 34%,respectively,at the nickel recovery of 50. 06%,were obtained.Therewith,the problem of poor Cu / Ni separation performance for the conventional technique can be solved.