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一、引言金的比重约为19,在砂金矿中主要的脉石矿物石英的比重仅为2.65,因此砂金应当是极易分选的矿石。然而在生产实践中,用普通的重选设备分选,效果却并不很好。例如采用固定溜槽选别砂金矿,回收率一般只有50％左右,振动溜槽分选砂金回收率一般为60％左右,跳汰-摇床联合作业的回收率一般也只有80％左右。而在旋转流中分选砂金
I. INTRODUCTION The proportion of gold is about 19, and the proportion of the main gangue mineral quartz in the gold-gold mine is only 2.65. Therefore, the gold should be easily sorted ore. However, in the production practice, using ordinary sorting equipment sorting, the effect is not very good. For example, using fixed chute seismotopic gold and gold recovery, the recovery rate is generally only about 50%, vibration chute sorting gold recovery rate is generally about 60%, jig - shaker recovery rate of the joint operation is generally only about 80%. Sorting gold in the swirling flow