A kinetic model for single coal particle in separation region of static-dynamic blade coupling rotary separator was established.Based on this model

the separation characteristic of the pulverized coal particles in the separation region was investigated numerically.A model test table was set up according to the similarity principle to study the influence of rotating blade speed and air volume on the separating property.The results showed that

the rotary classifier can guarantee pulverized coal with smaller fineness.However

when rotating blades speed was increased to a certain degree

the influence of increasing the speed on separating effect became smaller and smaller.On the premise of satisfying the pulverized coal conveying requirements

to give full play to the rotary classifier's advantage

smaller air volume was chosen to reduce the fineness of pulverized coal

while the combined efficiency had almost no change.