Drying machine used in building material, metallurgy, chemical industuy, cement to dry the slag, limestone, coal powder Drying machineColor: any color is ... your demand rotary dryer: Drier is a kind of machine with a rotating cylinde which is a little bit incline ... , metallurgy, chemical industuy, cement to dry the slag, limestone, coal powder,clay,etc.it is simply structure, polished manufacture, high ...