... drying mineral ore, sand, coal,bagasse, rice husk and saw dust 2.reasonable structure, low cost High Capacity Rotary ... , building material, metallurgy, chemical industry, cement industry, and etc.Zhengzhou Yufeng is a professional manufacture of rotary drum ... Dryer main parts: cylinder, lifters, driving device, supporting device and sealing ring, feeding device, discharging device, gear, gearbox, ...