新疆某铜镍硫化矿选矿工艺研究

新疆瑞伦某铜镍硫化矿原矿含铜0.14%,含镍0.51%,属于高镍低铜硫化铜镍矿。原矿中铜品位较低,同时含有大量易泥化的滑石、蛇纹石等脉石矿物,给该铜镍矿的高效回收带来不利影响。为高效开发利用该铜镍硫化矿石,进行了系统的选矿工艺研究。实验室小型闭路试验结果表明:在磨矿细度为-74μm占75%,以碳酸钠为pH调整剂,硫酸铜为活化剂,水玻璃和CMC为抑制剂,Z-200、丁铵、丁黄和戊黄为捕收剂的条件下,经2粗4精3扫铜镍混合浮选,铜镍混合精矿以石灰为pH调整剂、Z-200为捕收剂、BK-204为起泡剂,可获得含铜26.12%、含镍0.55%,铜回收率76.49%、镍回收率0.44%的铜精矿,含镍10.42%、含铜0.39%,镍回收率73.14%、铜回收率9.97%,MgO降至5.88%的镍精矿。试验解决了镍精矿中氧化镁杂质含量较高的问题,提高了精矿质量,可以为现场生产提供理论依据。

Study on Beneficiation Process of a Copper-Nickel Sulfide Ore in Xinjiang

The raw ore of Xinjiang Ruilun copper-nickel ore contains 0.14% copper and 0.51% nickel, belonging to the high nickel and low copper sulfide copper-nickel ore. The copper grade in the ore is relatively low, and contains a large number of gangue minerals such as talc and serpentine which are easily muddy, which adversely affects the efficient recovery of the copper-nickel sulfide ore. In order to efficiently develop and utilize the copper-nickel sulfide ore, a systematic beneficiation process was carried out. The laboratory closed-circuit test results show that: the fineness of grinding is -74 μm, accounting for 75%, sodium carbonate is used as pH regulator, copper sulfate is used as activator, and sodium silicate and CMC are depressant. Z-200, ammonium butyl aerofloat, butyl xanthate and amyl xanthate are the collectors, after two roughing, four cleaning, three scavenging copper-nickel mixed flotation, copper-nickel mixed concentrate with lime as pH regulator, Z-200 as collector, BK-204 as foaming agent. Copper concentrate containing 26.12% copper, 0.55% nickel, 76.49% copper recovery and 0.44% nickel recovery, nickel concentrate containing 10.42% nickel, 0.39% copper, 73.14% nickel recovery, and 9.97% copper recovery was obtained. The MgO is reduced to 5.88% in nickel concentrate. It solves the problem of high content of magnesium oxide impurities in nickel concentrate, improves the quality of concentrate and provides theoretical basis for on-site production.