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萨德伯里镍矿石含有大量脉石矿物磁黄铁矿 (Fe8S9) ,磁黄铁矿使得该类矿石难磨。本文提出用“磁浮选法”来有效地处理含磁黄铁矿的矿石。该法通过外加磁场将泡沫产品中的磁性磁黄矿留在浮选槽中 ,而降低浮选精矿中的磁黄铁矿的含量。为了获得好的磁浮选指标 ,需要对几个变量进行优化。在本研究中 ,用Box Wilson试验设计方法研究了 3个变量 (起泡剂用量、捕收剂用量和空气流量 ) ,此外还对其它一些变量 (磁铁转速、磨矿细度、矿浆浓度和浮选时间 )单独进行了研究。在最佳条件下用含 1 92 %镍的鹰桥镍矿石进行磁浮选试验 ,一段选别获得的精矿镍品位为 13 5 6 % ,回收率为 74 32 %。通过精选和扫选可以进一步提高精矿品位和回收率。将该法与常规方法进行了比较 ,结果表明 ,磁浮选指标较好
Sudbury nickel ore contains a large amount of gangue pyrrhotite (Fe8S9), pyrrhotite makes this kind of ore hard grinding. In this paper, the “magnetic flotation method” is proposed to effectively treat ore containing pyrrhotite. The method of magnetic field by the magnetic field will be left in the flotation product of magnetic yellow magnetite flotation tank, and reduce the flotation concentrate pyrrhotite content. In order to obtain good maglev index, several variables need to be optimized. In the present study, three variables (amount of frother, amount of collector and air flow) were studied using the Box Wilson experimental design method. In addition, other variables (magnet speed, grinding fineness, pulp concentration and float Select time) studied separately. Magneto-flotation tests were carried out on Eaglebridge nickel ores containing 1 92% nickel under the optimal conditions. The grade of nickel concentrate obtained was 136.6% with a recovery of 74.32%. Concentrate grade and recovery can be further enhanced by selection and sweep. The method is compared with the conventional method, the results show that the magnetic flotation selection index is better