What is a disc granulator?
- Disc granulator, also called ball disc, can be used for various dry powder granulation and dry powder pre-wet granulation. Pre-wet granulation has good effect and should be used first. It is the main equipment for forming powdery materials into balls. The evenly mixed raw materials enter the disc at a uniform speed. Under the combined action of gravity, centrifugal force and friction between materials, the material moves up and down repeatedly in the disc until it reaches the specified particle size. Overflow from the edge of the plate. Disc granulator is widely used in powder granulation in industries such as compound fertilizer, biological fertilizer, organic fertilizer, coal, metallurgy, cement, and mining.
Advantages of disc granulator:
- The disc granulator inclination angle of the ball forming plate is convenient to adjust, the structure is novel, the weight is light, the height is low, and the process layout is flexible and convenient.
- The disc granulator ball forming disc is composed of a disc body and disc segments. The disc segments can be adjusted up and down along the disc body, and the ends of the disc segments are edge flanges to ensure that the balls will not be strained or torn when they are discharged from the disc.
- After the frame is welded and the stress is relieved, its mating surface is processed and formed in one step on the boring and milling machine to ensure higher assembly accuracy and smoother operation of the entire machine.
- The disc granulator scraper device, which is composed of a non-powered combined scraper and an angle-clearing scraper, cleans the bottom and edges at the same time. When used in conjunction with the optimized balling disk, the balling effect is better, and more than 90% of qualified balls are achieved.
Disc granulator application：
- Organic fertilizers and compound fertilizers
- Bentonite clay to make cat litter particles
- Used in chemical building materials, etc.
- cement, sludge
- animal feed
- Metallurgy, refractory materials, etc.
- Fragrance beads manufacturing
Working principle of disc granulator:
- The raw meal powder is made into pellet cores with uniform particle size, and then fed into the disc granulator. After the pellets enter the disc granulator, they are affected by centrifugal force, friction and gravity in the disc granulator. Parabolic motion, and the water in the ball is continuously squeezed out of the surface during the continuous rolling process. Due to the adhesion and plasticity of the material, the ball core and the raw meal powder bond with each other during the movement and gradually grow. Due to the adhesiveness of the material and the natural volatilization of the surface liquid film, the material ball has a certain strength. When the parameters such as the inclination angle, disc edge height, rotation speed and moisture content of the disc granulator are constant, the balls of different particle sizes leave the disc edge of the disc granulator and roll downward due to different gravity. Then as the tilt plate rotates, it is discharged from the edge of the disc granulator plate and out of the disc granulator disc.
Comparison before and after forming balls by disc granulator
Working site of disc granulator in organic fertilizer production line
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