... 2.Automatic temperature control system 3.Direct process High quality screw conveyor sawdust dryer Work principle:The raw material plate which is ... . Then water will be separated from the materials by hot air-flow and changed into vapour to be discharged into ... gas, wood, and etcUsage:Widely used to dry yellow sand, clay, slag, flyash, , iron powder,sand in casting, ect.Investment:Low consumption, ...