1.Drum is fitted with single piece, hot-formed ring without welded joint (drum tyre) on each end, mounted to the drum shell with spring plates. 2.Each drum tyre is seated and rolled on two Trunnion rollers. 3.Feeding end of the inclined drum is further guided by 2 guide rollers to limit the axial movement. 4.Special shovel flights are installed to the internal surface along the drum length to transport and form efficient drying curtain to minimize fuel consumption. 5.Special vacuum drum pressure device is fitted to control rotary actuator at the exhaust fan to regulate the air flow.