The disc granulator is the most classic and mature model for organic fertilizer granulation, commonly known as “snowball granulation.” Its advantages include extremely high sphericity, beautiful appearance, and strong marketability, making it particularly suitable for high-end granular organic fertilizers, flower fertilizers, and fruit and vegetable fertilizers.

The disc granulator has a very simple structure: an inclined disc, scraper, reducer, and angle adjustment device. The disc inclination angle is typically between 35° and 55°, and can be finely adjusted according to the material’s flowability. During operation, the rotating disc causes the material to rise and roll, while a spray moistens the material, allowing the powder to be layered and gradually rolled into uniform spheres. The internal scraper adheres closely to the bottom of the disc to prevent material from sticking.

In terms of details, the disc granulator produces uniform spheres with consistent particle size, excellent grading effect, and minimal defective powder. It requires a high degree of material fineness, generally requiring grinding to 80-100 mesh, with moisture content controlled at 25%-30%. The pelletizing rate is approximately 70%-80%, and recycled material can be used for granulation, resulting in high overall utilization.

Disc granulators are intuitive to operate, require minimal maintenance, and are inexpensive, making them suitable for beginners. The disadvantage is that they require a matching drying system and occupy a slightly larger area. However, because the pellets are round and have an excellent appearance, they have a greater advantage in the market and are a commonly used model for manufacturers whose main product is organic fertilizer.