The drum granulation machine produced by Zhengzhou Tianci Heavy Industry Fertilizer Equipment Factory is a tilted rotary cylinder, and the speed can be adjusted. When the liquid content of the feed powder is appropriate, agglomeration occurs and rolls in the drum. The drum has a certain slope, and the angle between its axis and the horizontal is below 10°, which can assist the material to roll along the length of the drum. A stopper ring is often installed at the feed end to prevent the material from flowing back. A retaining ring can also be installed at the discharge end to increase the thickness of the material layer and extend the residence time in the main drum. In other occasions, a spiral discharge ring is often used to convey the boredom to the screen at the rear of the drum. Sometimes the cylindrical screen is integrated with the rotating drum to form a product discharge port. The feed is composed of fresh materials and recycled materials, and the feeding system can use belt conveyors, chute pipes or other similar equipment. The bonding liquid is injected either before the solid material enters the rotating cylinder, or immediately after the solid enters the rotating cylinder.
Like the disc granulator, whether the material can react well in the drum, the inner surface structure of the drum plays a very important role. The general shirt inside the steel drum used to be thermally expandable metal. The function of various internal scrapers is to maintain a certain thickness of the material on the inner surface of the drum, make the material layer uniform, and facilitates the normal rolling and turning of the material in the drum. Rubber baffles and linings, as well as external shock absorbers are used to prevent the accumulation of fertilizer during the NPK fertilizer manufacturing process.