... 2600mm,2800mm,....,4200mm.2.What's the usage of rotary dryer?Rotary drier is widely used for drying materials in ... temperature ( generally 250-350°C)3.Simple Structure:Rotary drier machine is mainly composed of shell, back and forth supporting ... this machine include firebox, feeding and discharging equipment, dust catcher, etc.4.Rotary drier working principle:Rotary drier adopts direct flow type of ...