... 2.good performance. 3. easy operation,l Roller Drying machine, rotating drying machine, , Introduction:Roller Drying machine Drum dryer, also known as ... industry, drying coal, limestone, grain, sand, clay and other materials. Roller Drum dryerThe main part of the drum dryer for a ... to its length, usually between 1 ° ~ 5 ° between. Material were feed into from the higher side of drum, and contact with ...