It is mainly composed of  the rotating barrel, raising plate, transmission gear, supporting device and sealing rings, the indirect heat drier can dry wet materials such as mineral waste, limestone, pulverized coal , clay and so on.

    Compare with rotary drying machine, it has the same output, the indirect heat drier needs low investment. Compact structure and reasonable disposition have enhanced the rate of heat exchange between the materials and the heat energy, thus the drying effect is better. The indirect heat drier is suitable for drying granule materials such as yellow ground, mould sand, mineral waste, coal waste and small clay etc.After being dried, the  rate of moisture content can be less than1%. During the working process, the hot air can not get to the materials directly because the indirect heat drier conducts the heat indirectly via built-in thermal pipe. 

     After getting into the rotary barrel, the materials will be raised up continuously by the shoveling plate. In the  medium layer of the barrel, the materials will be dried because they not only absorb the heat from the inner barrel but also the heat of the middle rotating barrel. Finally, the dried products will be discharged from the barrel under the impact of  hot air. The wet materials will remain in rectangular raising plate to be dried, and customers can adjust the rotary drier according to different moisture index.