Disc granulators are widely used in fertilizer, feed, chemical, and other industries for producing granules. Their ability to efficiently create uniform-sized particles comes from their unique working mechanism.
How Disc Granulators Work
1.Material Loading: The raw material (such as powdered fertilizer or feed) is placed into a rotating disc.
2.Rotation: The disc is tilted at an angle. As it spins, the material rolls upward and then falls vertically when blocked by a scraper at the highest point.
3.Granule Formation: During rotation, centrifugal force pushes the material against the disc wall, creating mechanical compression, rolling, and collisions. These actions, combined with the liquid phase’s surface tension, cause the powder to cluster into “seed pellets.” These pellets gradually grow into full-sized granules through continuous rolling and compaction. Finished granules spill out from the disc edge once they reach the desired size.
Adjustment Tips for Optimal Performance
1.Disc Angle: Adjust the tilt between 45-55°based on material properties. Increase the angle for sticky materials; reduce it for loose, lightweight powders.
2.Rotation Speed: Adjust disc speed between 15-30 RPM. Higher speeds favor smaller granules; lower speeds produce larger ones.
3.Moisture Control: Proper moisture improves particle bonding. Excess moisture causes material to stick to the disc or blades.
4.Scraper Positioning: The scraper’s angle and position affect material flow and granule growth. Fine-tuning these ensures even particle size and efficient recycling of unformed material.
By optimizing these factors, disc granulators can operate at peak efficiency, consistently producing uniform, high-quality granules.