Drum granulator is a kind of granulator for fertilizer, which can make materials into specific shapes. Drum granulator is one of the key equipments in compound fertilizer industry. It is suitable for cold and hot granulation and large-scale production of high, medium and low concentration compound fertilizer. The main working method is wet granulation of agglomerates.
After humidifying in the tank, use a certain amount of water or steam to make the basic fertilizer fully react. Under certain liquid phase conditions, with the help of the rotation of the cylinder, the material particles are extruded. The pressure condenses back into a ball.
The drum granulator of organic fertilizer equipment is filled with steam, ammonia or phosphoric acid or nitrogen solution, ammonia phosphorus slurry, and heavy calcium slurry to complete the chemical reaction and heating granulation process of compound fertilizer in the barrel; or a small amount of water is added to make the compound fertilizer cold granulation.
The material to be pelleted is rotated through the cylinder and bonded to form a ball under certain humidity and temperature to complete the pelleting process.
In the pelletizing process of drum fertilizer granulator, the powder material is mainly cladding type, so the material circulation volume needs to be large, so that the material can form large particles in the cladding process. When the water content in the material is large, the water injection should be reduced to make the fertilizer made into granules absorb less water.
When granulating with this combination method, if the water content in the material is small, more water injection is needed. Because the materials are combined with each other, the gap between the powder particles needs to be filled with water. As the understanding of granulation process has been deepened, some suitable monitoring tools have been developed, so the granulation process can be simulated and controlled automatically by computer.
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