... slime dryer, bentonite dryer, ore concentrate dryer, wood chip dryer, cassava dryer, gypsum dryer, cow dung dryer ... device, supporting device and sealing ring.3. Can I use the coal or gas as the ... furnace body and other structure. 2. The fuel can be coal, fire, gas, and electricity and ... other fuel. 3. We can design the gas generator furnace, firebox, and euipped elevator ...