... 3.drying Sawdust,slag, limestone,coal Sand dryer and Sawdust Rotary Dryer machine Rotary dryer/Drum Drier is widely used in mining industry ... device, gear, gearbox, electric motor, cyclone dust collector, furnace and etc.3. Rotary Dryer Drum drier heating source: coal, coal gas, natural ... gas, LPG gas, wood, and etc.4. Rotary Dryer Drum Drier Mode of flow: direct flow or ...