... 1500mm,1800mm,2000mm,2200mm,2400mm,2600mm,2800mm,....,4200mm.2.What's the usage of rotary dryer?Rotary drier is widely used for drying materials ... include firebox, feeding and discharging equipment, dust catcher, etc.4.Rotary dryer working principle:Rotary drier adopts direct flow type of heating with heat ... 18.9Ø1.5*154-618.5Y200L1-6JZQ500-III-2F-----21Ø1.8*124-618.5Y160L-6ZQ50-16II-216.4622.83Ø2.2 ...