FIELD: drying of building materials. SUBSTANCE: mounted additionally at outlet of unloading end of drum is unloading chamber; casing is mounted in clearance between them on outer side of unloading end concentrically with drum surface. Casing is mounted by means of screw feeder. Arranged on inner surface of casing between drum end and unloading chamber are blades. End wall of drum has perforations on side of unloading end; heat-transfer agent supply branch pipe is located in casing. EFFECT: enhanced efficiency. 1 dwg
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