Rotary dryer, which also known as rotary drum dryer is widely used in a variety of materials drying operations.As reliable operation, convenient operation, strong adaptability, large capacity, it is widely used in metallurgy, building materials, food, light industry, chemical industry, coal, medicine and mining industries. Rotary dryer is suitable for drying granular materials in general. It can also be mixed with some materials by drying sticky paste ater ials or materials with higher water content.[...]