The rotary dryer is mainly used for separating and pre-drying of 3D pellets. It receives the raw pellets by conveyor. Hot air is circulating inside the drum to provide heat and dry the pellets while tumbling. The drying temperature and time are adjustable as demands. After require time, the pellets(now already separated)is discharged at the end of drum then conveyed to the sifter via a connecting conveyor.