由于青海某硫化铜镍矿滑石化强蚀变现象较多,脉石矿物以辉石、橄榄石、滑石等钙镁硅酸盐矿物为主,造成了浮选过程存在混合精矿镍、铜品位较低,氧化镁含量偏高.针对这一问题,试验研究采用羧甲基纤维素(CMC)为抑制剂使镁硅酸盐矿物得到了很好的抑制,确定精选添加CMC用量为300 g/t,闭路试验获得了精矿镍、铜品位分别为5.94%、1.18%,回收率分别为82.23%、79.93%的选别指标,氧化镁含量从优化前的15.05%降至2.93%.
Because the alteration phenomenon of talc were serious, and the gangue mineral mainly consisted of pyroxene, olivine, talcum and other calcium-magnesium silicate minerals, the grades of nickel and copper in the mixed concentrate were low, and the content of MgO was high after flotation.Give that the issue, in the test carboxy methyl cellulose(CMC) was used as inhibitor in order to achieve well Inhibition of silicate minerals.The dosage of CMC during the cleaning process was 300 g/t, and the closed circuit flotation index were that the grades of copper and nickel in the copper-and nickel-bearing concentrate were 5.94% and 1.18%,
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