In the process of transforming organic fertilizer from powder to granules, the drum granulator is undoubtedly the “core craftsman.” It not only agglomerates loose fertilizer powder into uniform granules, but also seamlessly integrates with other fertilizer equipment, creating high-quality, easy-to-use and easy-to-store organic fertilizer for farmers worldwide. It’s no wonder it’s become a “star equipment” in fertilizer production lines.

To maximize the effectiveness of the drum granulator, a mixer is essential for its initial preparation. The fermented and decomposed organic fertilizer powder is first mixed with an appropriate amount of binder (such as bentonite or starch solution) and then fed into the mixer.High-speed mixing forms a “dough” with moderate moisture and uniform texture. This step serves as the foundation for subsequent granulation. If the materials are not evenly mixed, even the most powerful drum granulator will struggle to produce smooth, round granules.

Once the prepared “dough” is fed into the drum granulator, the magical “forming magic” begins. The drum rotates slowly at 15-25 revolutions per minute, while internal lifters continuously lift and drop the material. Under the combined effects of centrifugal force and gravity, the material gradually condenses into granules with a diameter of 2-5 mm. Compared to other granulation equipment, the granules produced by the drum granulator are denser and harder, making them less prone to breakage during transportation and storage.It is particularly popular among large farms abroad.

The newly produced pellets still contain a significant amount of moisture and require a drum dryer to “dry and shape” them. In a hot air environment of 60-80°C, the pellets’ moisture content quickly drops to below 12%, while becoming more compact. Afterward, a vibration screener machine separates unqualified small particles from larger ones. The small particles are then returned to the mixer for recycling, while the qualified pellets enter packaging.