... is easy to adhere , possessing with small-diameter particles , light quality , easy floating etc . At present , the sieving ... —180 meshes light calcium , 300 meshes haw powder , 320-500 meshes zinc powder , 500 meshes black iron oxide , red iron oxide , 120 ... materials , copper powder , carbon black , active carbon , light calcium carbonate , iron ore sand ect .4.Features high sieving efficiency : more ...