... Sawdust,slag, limestone,coal Sand dryer and Sawdust Rotary Dryer machine Rotary dryer/Drum Drier is widely used in mining ... rotation, easy operation, convenient transportation and so on.2. Rotary Drum Dryer main parts: cylinder, lifters, driving device, ... supporting device and sealing ring, feeding device, discharging device, gear, gearbox, electric motor, ...