Rotary Drum Granulator: The "Shaping Master" of NPK Granules?

 acts like a skilled "shaping master," transforming evenly mixed nitrogen, phosphorus, and potassium raw materials into granules of uniform size and moderate hardness. Once the mixed powdered ingredients enter the inclined drum, the slow rotation of the drum causes them to tumble and agglomerate. With the addition of an appropriate amount of binder, the loose powder gradually binds into spheres, ultimately forming granules with a diameter of 2-4 mm. These granules not only facilitate fertilizer application but also allow for a slow release of nutrients, preventing crop root burn.

The smooth operation of this NPK production line relies on the harmonious coordination of multiple pieces of equipment. Before the rotary drum granulator begins, the raw material batcher, like a meticulous "nutritionist," precisely blends urea, diammonium phosphate, potassium chloride, and other ingredients according to the crop's desired nitrogen, phosphorus, and potassium ratios. Next, a twin-shaft mixer thoroughly mixes these ingredients with a small amount of binder, ensuring a uniform mix of at least 95%. Once the rotary drum granulator has finished shaping the pellets, a drum screener machine immediately removes oversized or undersized particles. Unqualified particles are returned to the pulverizer for reprocessing, while qualified particles enter the dryer, where excess moisture is removed at 80-100°C.Finally, a drum fertilizer cooler cools the pellets to room temperature before the packaging machine packages them into bags, creating a high-quality NPK compound fertilizer.

The advantages of the rotary drum granulator are particularly prominent in the production line: its rotary drum granulation method consistently maintains a pellet formation rate of over 85%. Furthermore, the drum liner can be replaced based on the characteristics of the raw materials, reducing wear and accommodating different fertilizer formulations.