A drum granulator is a molding machine that can make materials into specific shapes. Rotary drum granulator is one of the key equipments in the compound fertilizer industry. It is suitable for cold and hot granulation and large-scale production of high, medium and low concentration compound fertilizers. The main working method is wet granulation of agglomerates. Through a certain amount of water or steam, the basic fertilizer is fully chemically reacted in the cylinder after being humidified. With the help of the rotating movement of the cylinder, the material particles are formed by extrusion force and agglomerated into balls.