... 2.Automatic temperature control system 3.Direct process High quality screw conveyor sawdust dryer Work principle:The raw material plate which ... , gearbox, motor, dust collector, furnace and etc.Heat Resource:coal, coal gas, natural gas, LPG gas, wood, and etcUsage:Widely used ... to dry yellow sand, clay, slag, flyash, , iron powder,sand in casting, ect.Investment:Low consumption, adpot the alloy ...