Rotary Drum Granulator

A continuous wet-granulation unit designed for large-scale compound fertilizer production. The rotating cylindrical drum agglomerates powdered fertilizer material into uniform pellets by combining controlled moisture (water or steam) with tumbling action. Under the proper liquid-phase conditions and drum rotation, particles are repeatedly compacted and rolled into spherical granules.

Key features

Process: wet granulation (cold or hot) for high-, medium- and low-concentration compound fertilizers
Capacity: 3–8 t/h (continuous operation)
Principle: adjustable addition of water/steam and tumbling motion to promote particle adhesion and pellet growth
Typical components: rotating drum, inlet/outlet ports, spray or steam humidification system, internal lifters or flights for particle turnover, drive and support frame

Benefits

Produces uniform, high-density pellets with good mechanical strength and reduced fines
Suitable for both cold- and hot-granulation processes, allowing flexibility in raw materials and formulations
Continuous operation supports integration into medium- to large-scale fertilizer production lines
Adjustable process parameters (drum speed, moisture input, residence time) to control granule size and quality
Minimizes dust and improves downstream handling, drying and coating efficiency

Applications

Central piece of a compound fertilizer production line (NPK and other blended fertilizers)
Can be paired with mixers, dryers, coolers, screening and coating equipment for a complete production system
Suitable for chemical and agricultural fertilizer manufacturers seeking stable pellet quality and scalable throughput

Typical specification (example)

Production capacity: 3–8 tonnes per hour
Granulation method: wet (water or steam)
Operating mode: continuous

For planning and integration, confirm required drum diameter/length, motor power, heating/steam system and material feed rates with the equipment supplier to match your production targets and raw-material characteristics.