... material rotary dryer, rotary drying machine, sand dryer, sawdust dryer, coal dryer, coal slime dryer, bentonite dryer, ore concentrate dryer, wood chip dryer, cassava dryer, gypsum dryer, cow dung dryer, drying ... , gas, electricity, oil and wind power to heat the dryer machine.4. How the rotary dryer to work?The raw material plate is ...