The disc granulator is a commonly used granulation equipment in industries such as fertilizers and chemicals. Its unique equipment principle magically transforms powdered materials into granular products.
The core component of a disc granulator is a tilted and uniformly rotating disc. After the device is started, the motor drives the disc to rotate at a stable speed. The powdered material is evenly dropped onto the rotating disc through the feeding device.
During the rotation of the disc, two forces play a crucial role in the movement of the material: centrifugal force and frictional force. Centrifugal force causes the material to have a tendency to move towards the edge of the disc, while frictional force causes the material to climb up along the inner wall of the disc. So, the material forms a circular motion trajectory on the disc: starting from the bottom of the disc, it moves upward as the disc rotates, reaches a certain height, and then falls back to the bottom due to gravity, repeating this process.
The addition of binders is a crucial step in particle shaping during the process of material movement. Spray the prepared adhesive evenly onto the moving material through the nozzle installed above the disc. Adhesive is like glue, which binds small powder particles together.
As the disk continues to rotate, the small particles that have already started to adhere continue to roll and collide, adsorbing the surrounding powdery materials like rolling snowballs, gradually increasing in volume and forming larger particles.
Operators can control the size and shape of particles by adjusting several key parameters. For example, the rotational speed of the disc is an important factor. When the rotation speed is fast, the movement speed of the material on the disc increases, the residence time is relatively short, and the formed particles are smaller and more uniform; When the speed is slow, the material has more time to aggregate and grow, and the particles will be relatively larger. In addition, the inclination angle of the disc can also affect the formation of particles. A suitable inclination angle can ensure that the material has an appropriate motion path and residence time on the disc, which is beneficial for the uniform growth of particles.
The disc granulator is like this, using simple and clever principles to efficiently convert powdered materials into granular products that meet production needs, playing an important role in many industrial production fields.