In fertilizer processing, the rotary drum granulator is a key piece of equipment for converting powder into granules. Its stable performance makes it a common choice for most fertilizer production scenarios.

Structurally, the core of a rotary drum granulator consists of an inclined drum, a drive system, a spray device, and a heating and insulation layer. The drum’s tilt angle can be adjusted based on the characteristics of the raw material, typically controlled at 3°-5°. This ensures adequate tumbling of the raw material while preventing the granules from clumping due to prolonged dwell time. The drive system drives the drum at a constant speed of 10-20 rpm via gears or belts, ensuring a stable and controllable granulation process.

During operation, mixed fertilizer raw materials enter the drum through the feed inlet. As the drum rotates, the raw materials continuously tumble and collide within the drum. Simultaneously, a spray device applies an appropriate amount of binder to the raw materials, gradually agglomerating them into small granules. The heating and insulation layer maintains the temperature inside the drum within an optimal range, helping the granules quickly solidify and form. Finally, the formed fertilizer granules are discharged from the discharge port and enter the subsequent screening and cooling stages.

This rotary drum granulator’s advantage lies in its wide adaptability. Whether it’s nitrogen-phosphorus-potassium compound fertilizer, organic fertilizer, or biological fertilizer, efficient granulation can be achieved by adjusting parameters. The highly uniform granulation and moderate granule strength facilitate subsequent storage and transportation, providing equipment support for the large-scale advancement of fertilizer production.