针对不同叶片间距的小型转子型分级机 ,在不同风量、转速、给料浓度的条件下 ,对滑石粉进行了分级试验研究 ,从中得出了转速、风量、给料浓度对分级效果的影响 ,特别是给料浓度对分级效果的影响规律。研究表明 ,间距小的分级机其分级效果都好于间距大的分级机 ,并且它们的效果可由分级细粉的粒径d97、d50值和两个分级机的分级精度值来体现 Aiming at the small rotor type classifier with different vane spacing, the classification experiment of talcum powder was carried out under the condition of different air volume, rotational speed and feed concentration, and the influence of rotational speed, air volume and feed concentration on classification results was obtained. In particular, the impact of feed concentration on the grading effect. The research shows that the grading machine with small spacing is better than the grading machine with large spacing, and their effect can be reflected by the grading fineness d97, d50 and grading accuracy of two graders