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针对含碳钼镍矿中钼镍难于高效回收的问题,在原有高压氧氨浸出工艺基础上,利用浮选进行预先抛尾,提高浸出的入料品位,从而提高浸出效率。采用BK-301捕收剂及羧甲基纤维素钠(CMC)抑制剂进行了钼镍混合浮选的实验研究。通过条件实验,确定了最佳磨矿制度和最佳药剂制度,并分别进行了开路实验和闭路实验,闭路实验获得了钼品位6.69%,回收率88.91%;镍品位5.43%,回收率84.02%的选矿指标。实验结果表明,CMC对碳质物的抑制效果显著,减少了碳对浮选过程的影响,BK-301对硫化矿捕收效果较好,能够实现对Mo,Ni的高效捕收,该工艺流程比较简单,作为选-冶结合工艺的前期处理,达到了很好的指标,实现了对碳的有效抑制和Mo,Ni的高效富集,也为后续的浸出工艺创造了条件。
In view of the difficulty of efficient recovery of molybdenum and nickel in carbonaceous molybdenum nickel ore, based on the original leaching process of high-pressure oxygen and ammonia, flotation is used to pre-tail the molybdenum and nickel so as to improve the leaching feed grade and improve the leaching efficiency. BK-301 collector and sodium carboxymethyl cellulose (CMC) inhibitors were used to study the mixed flotation of molybdenum and nickel. Through the condition experiment, the best grinding system and the best drug system were determined. The open circuit test and closed circuit test were carried out respectively. The closed circuit test obtained the molybdenum grade of 6.69%, the recovery rate of 88.91%, the nickel grade of 5.43% and the recovery rate of 84.02% The dressing index. The experimental results show that CMC has a significant effect on the inhibition of carbonaceous matter and reduces the impact of carbon on the flotation process. BK-301 has good catching effect on sulphide ore and can achieve efficient capture of Mo and Ni. The technological process Is relatively simple, as the pre-treatment of the combination-smelting process, achieves a very good index, achieves the effective inhibition of carbon and the efficient enrichment of Mo and Ni, and also creates the conditions for the subsequent leaching process.