... rotary dryer?Rotary drier is widely used for drying materials in the industries of cemet, mine, contruction, chemical, food, compoud ... not in the the scope of this machine include firebox, feeding and discharging equipment, dust catcher, etc.4.Rotary dryer working principle: ... exchange heat sufficiently with inner the heat flow. In the end, water in the material is dried by repeatedly scattering5.our ...