... granularity in the industries of mineral dressing, building material, metallurgy and chemical. Rotary dryer can be used ... . Application Rotary drum drying machine (also called drum dryer) is widely used in building material, metallurgy, chemical industry, ... device ,sealing ring, heat source, beater device, belt loading machine, feeding machine, rotary roller, belt discharger, draft fan, discharger, and ...