... , coal powder, slag, clay . Rotary drum dryer is used for drying materials with humidity or granularity in the industries of ... Rotary drum dryer working principle:the raw material plate which is arranged reasonably with changeable angles in order, throws moisture materials into the rotary cylinder ... energy consumption, easy operation, high output and so on.Rotary dryer main models : 1.0*10m,1.2*12m,1 ...