Industrial dryer also can be called rotary dryer or rotary drum dryer. It is widely used in food, forage, chemical engineer, medicine, and mining industries. The dehydrated wet materials go into the dryer and are turned by the evenly distributed shoveling plate. So they homo-disperse and fully get in touch with the hot air, pacing the heat transmission and mass transfer. The materials are sent to the star like discharging valve and the finished drying products are discharged by the slant shoveling plate and the thermal medium. This series of dryer go for the drying of slag with moisture less than 85%, such as brewer’s grains, bean dregs, sprayed concrete corn husk, coal slurry, and fruit residues. It has favorable effects on opening up feeding stuff, lowering the feed cost, and reducing the environmental pollution.