Rotary drum drying equipment usually use organic fertilizers, limestone, clay, water slag, coal slime, sludge, wood chips, etc. as raw materials. They have a wide range of applications and are suitable for fertilizer plants, steel plants, mining plants, power plants, and sewage treatment plants and so forth. It is also suitable for granular materials in the food industry, such as grains, beans and coffee beans. It is an ideal equipment for dry powdery, granular materials, damp and sticky materials, corrosive materials and biomass materials.