... 4.Reliable performance Double Drum Dryer of Zhengzhou Brand Manufacturer Application of Rotary DryerRotary dryer is used for ... drying sand, coal, sludge, coal slurry, fly ash, gypsum, clay, Kaolin, grain (corn, wheat ... ), mineral powder etc. It is widely used in building materials, metallurgy, cement and mining industry. Rotary dryer mainly consists of ...