... ,2600mm,2800mm,....,4200mm.2.What's the usage of rotary dryer?Rotary drier is widely used for drying materials in the ... Rotary drier machine is mainly composed of shell, back and forth supporting wheel, feeding and discharging unit and gear cap. The accessories ... which are not in the the scope of this machine include firebox, feeding and discharging equipment, dust catcher, etc.4.Rotary ...