SUN Zhanpeng， HAN Xiaopeng， SUN Guogang， HAN Xiao， WEI Qing

Abstract：In perspective of flow field organization, the classifiers were analyzed, and regrouped as vertical vortex classifiers and horizontal vortex ones according to the rotation axis of the vortex in classifying chamber. Several typical air classifiers were discussed on their flow field characteristics and research advances.Compare to the vertical vortex classifier, there was currently not sufficient research on the horizontal vortex classifiers. To improve the classification performance of the classifiers, suggestions of giving full consideration to the design and interaction of the gas flows for particle classification and elutriation were proposed. It is expected the centrifugal air classifiers will have a deeper development in future.

Keywords: centrifugal air classifier; vertical vortex classifier; horizontal vortex classifier; flow field organization; flow field combination