新疆某难选硫化铜镍矿浮选工艺

Flotation Technology of a Refractory Copper-Nickel Sulfide Ore in Xinjiang

根据新疆某硫化铜镍矿矿石的工艺矿物学特性,采用一次粗选、一次精选、两次扫选、中矿顺序返回的铜镍混合浮选流程,用碳酸钠作p H调整剂,六偏磷酸钠作分散剂,羧甲基纤维素作抑制剂,混合黄药作捕收剂,得到混合精矿含镍10.89%、含铜4.27%,镍回收率81.61%、铜回收率85.03%,氧化镁含量低于6.8%。六偏磷酸钠能分散蛇纹石与硫化矿物,降低蛇纹石对硫化矿物浮选的影响,而羧甲基纤维素能抑制含镁硅酸盐矿物的上浮,实现硫化矿物与含镁硅酸盐脉石的浮选分离。

A refractory nickel-copper sulfide ore from a mine in Xinjiang is floated by the process with one rough, one concentration and two scavenging according to the mineralogy characteristics of the ore. The sodium carbonate is used as the pH modifer, sodium hexametaphosphate and carboxymethyl cellulose as the modifer, mixed xanthate as the collector in the experiment. The concentrate with nickel grade of 10.89% , copper grade of 4.27% and nickel recovery 81.61% , copper recovery 85.03% is obtained, and the content of magnesium oxide in the product is lower than 6.8%. The sodium hexametaphosphate can disperse the serpentine and sulfide minerals, and reduce the adverse effect of serpentine mineral on sulfide mineral flotation, and carboxymethyl cellulose can depress the flotation of magnesium silicate gangue mineral and the flotation separation of sulfide minerals from gangue minerals is achieved. Therefore, in the flotation of a nickel copper sulfide ore containing a variety of magnesium silicate gangue mineral, the effect of combined use of the sodium hexametaphosphate and the carboxymethyl cellulose is suitable.