Based on ZT1.5-15 rotary drum dryer transition section unreasonable structure, material selection, secondary hot flue gas diffusion and formation of turbulent flow, caused that some dissipating heat from the surface of the transition section, rubber seals and the connection part of the transition section problems of easy burning, Heavy Medium Factory of Hebei Coal Science Institute, Xingtai Mining Industry Group Corporation Ltd., Jizhong Energy, the structure of the dryer and increase wear resistance high temperature resistant lining were improved. Nearly 5 a using effect showed that the improved dryers without period of burning rubber seals and wiring fault, energy-saving effect was obvious, improved labor environment, social and economic benefit was remarkable.