研究了西澳大利亚硫化镍矿石镍精矿中氧化镁(MgO)含量降低这一课题。利用普通浮选机和浮选柱进行了试验。普通浮选试验表明,使用氧化镁抑制剂控制精矿中氧化镁的含量是有效的。试验用的抑制剂是羧甲墓纤维素(CMC)和古尔胶,结果证明是最有效的。所有浮选柱试验都是用直径7.Ocm浮选柱进行的。利用冲洗水系统改善了泡沫相的化学特性,研究了抑制氧化镁的效果。这就允许大速率添加浮选调整剂,比通常高剂量添加到矿浆中更经济有效。以冲洗水形式添加到泡沫中的抑制剂用量分别为0.66、2.6、4.6、6.6kg/t。结果发现,当抑制剂添加到矿浆和冲洗水中时,与古尔胶相比,CMC是更有效的氧化镁抑制剂。过量添加CMC对镍的品位和回收率没有明显影响,而古尔胶的添加量超过最佳剂童时,则对镍的品位和回收率有不利影响。还发现冲洗水的pH值对精矿品位和回收率有积极影响。 The subject of reducing the content of magnesium oxide (MgO) in nickel sulphide ore from Western Australia was studied. Experiments were conducted using conventional flotation machines and flotation columns. Ordinary flotation tests show that the use of magnesium oxide inhibitors to control the concentration of magnesia in the concentrate is effective. The inhibitors tested were carboxymethyl cellulose (CMC) and guul gum and the results proved to be the most effective. All flotation column tests are carried out with a diameter 7.Ocm flotation column. The use of flushing water system to improve the chemical properties of the foam phase, the effect of inhibition of magnesium oxide. This allows flotation modifiers to be added at a large rate, which is more cost-effective than adding higher doses to the slurry. The amounts of inhibitors added to the foam as rinse water were 0.66, 2.6, 4.6, and 6.6 kg / t, respectively. As a result, it was found that CMC is a more effective magnesium oxide inhibitor than guer gum when added to pulp and rinse water. Excessive addition of CMC had no significant effect on the grade and recovery of nickel, while the addition of guer gum over the optimum dose of child adversely affected the grade and recovery of nickel. It has also been found that the pH of the flushing water has a positive effect on concentrate grade and recovery.