... .easy operation 2013 hot selling air classifier for zicron,caco3,sic powder,etc. 1.structure of air classifier :the whole set classifier ... for classifying kinds of materials, such as carborundum, Caco3,talcum powder, zircon powder, carbon black, activeted carbon ,etc. the hardness should be ... air classifier!! 2013 hot selling air classifier for zicron,caco3,sic powder,etc.