In the field of fertilizer production, the disc granulator is the core equipment for achieving fertilizer shaping. Its unique working principle and efficient processing method provide a large amount of high-quality granular fertilizers for agricultural production.
The processing process of a disc granulator begins with the preparation of raw materials. Firstly, various organic and inorganic fertilizer raw materials need to undergo pretreatment, including crushing, mixing, and other processes, to ensure uniform particle size and reasonable nutrient distribution of the raw materials. At the same time, the humidity of the raw materials should be adjusted to a suitable range, generally between 20% and 30%, which is crucial for the subsequent granulation effect.
When the preparation work is ready, the raw materials are transported to the rotating disc of the disc granulator. The disc starts to rotate uniformly under the drive of the motor, and the speed is usually adjusted according to the characteristics of the raw material and the required particle size, usually between 10-30 revolutions per minute. As the disk rotates, the raw material moves upward along the inner wall of the disk under the action of centrifugal force and friction force. After reaching a certain height, it falls back to the bottom due to gravity, forming a continuous cyclic motion trajectory.
The key step in this process is to spray adhesive or water. By installing a nozzle above the disc, evenly spray the pre prepared adhesive solution onto the moving raw materials. Adhesive is like glue, causing small raw material particles to adhere and aggregate together. As the disk continues to rotate, these small particles roll and collide, gradually adsorbing more raw materials and increasing in volume, ultimately forming particles of the desired size.
In order to control the size and shape of particles, operators can adjust parameters such as the inclination angle, rotation speed, and the amount of adhesive sprayed on the disc. For example, increasing the inclination angle of the disc will shorten the residence time of the material on the disc and make the particles relatively smaller; Increasing the amount of adhesive sprayed will make it easier for particles to aggregate and form larger particles.
After a period of granulation process, fertilizer particles that meet the requirements overflow from the edge of the disc, completing granulation. These granular fertilizers have good physical properties, regular shape, uniform particle size, and are easy to store, transport, and use.
The disc granulator plays an irreplaceable role in fertilizer production with its efficient and stable processing method, making important contributions to ensuring fertilizer supply for agricultural production.