... temperature ( generally 350-380°C).StructureRotary drum dryer machine is mainly composed of shell, back and forth supporting ... , etc).Working PrincipleRotary drum dryer adopts direct flow type of heating with heat source from firing unit. The ... Conveyor, Vibrating Screen, Flotation Machine, Magnetic Separator, Shaking Table, Spiral Classifier, Thickener, Filter, Drier, Rotary Kiln, Sand Washer, Sand ...