... ,2600mm,2800mm,....,4200mm.2.What's the usage of rotary dryer?Rotary drier is widely used for drying materials in the ... industries of cemet, mine, contruction, chemical, food, compoud fertilizer, etc. Feeding and discharging unit is ... generally 250-350°C)3.Simple Structure:Rotary drier machine is mainly composed of shell, back and forth supporting wheel, ...