... the dryer rotates, the material is lifted up by a series of internal fins lining the inner wall of the dryer ... Often, indirect heated dryers are used when product contamination is a concern.3. Rotary Kiln Dryer main technical parameter: ItemsDescriptionAssistant ... fire bricks . together with steam . with windowns holes outside.A:boiler,B:steam tank ,steam pipes,water pipes,valve,pressure ...