Sand rotary dryer is a dryer for handling a large number of materials. As reliable operation, operating flexibility, adaptability, large handling capacity, widely used in building materials, metallurgy, food, chemical, coal, medicine and mining industries. Sand dryer or yellow sand dryer is belonging to rotary drum dryer. Generally adapted to granular materials, can also be used for drying sticky pasty materials or materials with higher moisture which had mixed with materials. Particularly dry sand, sand dryer has excellent drying effect. Sand dryer has the advantage of large capacity, wide range of applications, small flow resistance, allowing a larger range on operation, convenient operation etc.