The rotary drum granulator is a molding machine that can manufacture materials into specific shapes. The drum granulator is one of the key equipment in the compound fertilizer industry, which is suitable for the large-scale production of cold and hot granulation as well as 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 the humidity is adjusted. Under a certain liquid phase condition, the rotation of the cylinder can make the material particles Produce squeezing force to reunite into balls.