Fertilizer Rotary Drum Granulator: High-Efficiency Production for Quality Pellets

What Is a Rotary Drum Granulator?

The Rotary Drum Granulator is a key piece of equipment in the compound fertilizer production process, and it is especially popular in NPK fertilizer plants. It is designed for wet granulation, using liquid binders (such as water, steam, or acid solutions) to agglomerate powdery materials into uniform spherical granules.

As a leading fertilizer equipment manufacturer, GOFINE Machine offers high-performance rotary granulators that help clients achieve high output, stable granulation, and excellent product quality.

Working Principle of Rotary Drum Granulator

The rotary drum granulation machine works by rotating a slightly inclined cylindrical drum. When the raw materials are fed into the drum:

The drum rotates continuously.

Powdery materials roll along the inner wall.

Liquid binders (steam or water) are sprayed to form adhesive layers.

The particles collide, stick, and grow into granules.

Granules are discharged from the outlet after reaching the desired size.

This wet granulation process provides high granulation efficiency and is especially suitable for large-scale continuous production.

Key Features of Our Rotary Drum Granulator

• Large capacity: 5–30 tons per hour (customizable)
• High granulation rate: Up to 90%
• Uniform granule size: Spherical or oval-shaped (2–6 mm)
• Corrosion-resistant materials: Carbon steel with anti-corrosion coating or stainless steel
• Long service life: Precision welding and durable seals
• Low dust & noise: Eco-friendly design

Applications of Rotary Drum Granulator

Rotary drum granulators are widely used in the production of:

NPK Compound Fertilizer

Urea, ammonium phosphate, potassium chloride, etc.

Organic-Inorganic Compound Fertilizer

Blends of composted manure and chemical nutrients

Bulk Blended Fertilizer (BB Fertilizer)

Optional coating after granulation

Chemical Granulation

For salt, detergent powder, and other industries

Suitable Raw Materials

Urea

Ammonium sulfate

Ammonium chloride

Ammonium phosphate (MAP, DAP)

Potassium sulfate

Potassium chloride

Organic compost powder

Humic acid / Amino acid mixtures

Advantages Compared to Other Granulators

• Higher production capacity than disc or roller granulators
• Better suited for continuous NPK fertilizer production
• More uniform granule shape and size
• Stronger granules with better moisture resistance
• Integrated with drying and cooling for streamlined process

Rotary Drum Granulation Process Flow

We provide complete fertilizer production line solutions with the rotary drum granulator as the core equipment. The typical process includes:

Raw Material Crushing and Mixing—Batching System (Auto/Manual)—Rotary Drum Granulation—Drying (Rotary Dryer)—Cooling (Rotary Cooler)—Screening Machine—Coating (Optional)—Packing Machine

This integrated system ensures continuous and automated production with low labor cost and high operational efficiency.

Ready to launch or scale your fertilizer granulation production? We offer comprehensive, end-to-end services, from equipment procurement to operational support, ensuring you maximize your profitability. Contact us today for a customized plan!