本文对用离心力来回收细磨矿粒进行了探讨。首先从理论上分析了密度介于5～16.3克/厘米~3的各种重矿物与硅石的分选效率。所研究的矿物粒度为1～5微米;理论分析表明这些重矿物与硅石的分选效率很高,品位可达80％,回收率在95％以上。试验选用1～5微米的锡石与硅石人工混合矿作为试料,试验结果与理论预测很吻合;由于这两种矿物在高pH值时分散较好,所以pH值大于4时分选效果较佳。 In this paper, the use of centrifugal force to recover fine grinding mineral particles were discussed. First of all, the separation efficiency of various heavy minerals and silica with density of 5 ~ 16.3 g / cm ~ 3 was theoretically analyzed. The study of the mineral particle size of 1 to 5 microns; theoretical analysis shows that these heavy minerals and silica separation efficiency is high, the grade up to 80%, the recovery rate of 95%. The experiment uses 1 to 5 micrometer cassiterite and silica artificial mixed ore as the sample, and the experimental results are in good agreement with the theoretical prediction. Since the two minerals are well dispersed at high pH, ​​the sorting effect is better when the pH value is greater than 4 .