Customized Rotary Drum NPK Compound Fertilizer Line System

Different commercial fertilizer manufacturing facilities operate under distinct raw material characteristics, site dimensions, environmental regulations, and production target capacities. The Customized Rotary Drum NPK Compound Fertilizer Line System is engineered as a fully flexible, turnkey wet agglomeration solution designed specifically to meet unique factory specifications for compound NPK fertilizer production (utilizing combinations of urea, ammonium nitrate, DAP, MAP, ammonium sulfate, and potassium chloride).

Rather than offering a fixed standard plant setup, Gofine Machine customizes every core component—from the number of automated raw material batching hoppers and the internal lining material of the rotary drum (such as anti-stick flexible natural rubber or stainless steel) to matching heat source systems (coal, biomass, natural gas, or heavy oil) for the rotary dryer and cooler units. Operating on steam-assisted or liquid-injected wet agglomeration principles, the system tumbles fine powders into high-strength, uniform spherical granules. Integrated with central PLC automation, continuous multi-stage screening, closed-loop material recirculation, and specialized anti-caking coating units, this tailor-made system guarantees granulating efficiencies exceeding 90% while optimizing energy consumption and factory layout footprint.

To ensure operational stability and long-term reliability, the Gofine rotary drum granulator incorporates several precision-engineered features:

• Corrosion-Resistant Interior: The internal drum is lined with specialized UHMW-PE (Ultra-High Molecular Weight Polyethylene) or acid-resistant stainless steel plates. This minimizes material sticking and protects the shell from the corrosive nature of ammoniated compounds.
• Enhanced Granulation Rate: Through the optimization of drum inclination (typically 2.0% to 5.0%) and rotational speed, the system achieves a granulation rate exceeding 90%, with fewer fines requiring recycling.
• Steam Injection Technology: Integrated steam piping allows for the adjustment of material temperature and moisture levels, ensuring optimal plasticity for granule formation without relying on excessive liquid binders.
• Heavy-Duty Transmission: Featuring a large cast steel gear and a high-performance motor-reducer assembly, the unit maintains stable torque even under full-load conditions (capacities ranging from 1 t/h to 20 t/h).

This granulation system is highly versatile and suitable for:

• High-Concentration Compound Fertilizer: Producing formulas like 15-15-15 or 20-20-10.
• Ammoniation Granulation Processes: Integrating liquid ammonia, phosphoric acid, or sulfuric acid.
• Organic-Inorganic Mixtures: Processing bio-organic materials that require a specific moisture-heat balance for pelletizing.

The production sequence in the drum is a coordinated mechanical and chemical process:

• Material Feeding: Base powders (such as Urea, MAP, or Potassium Chloride) are fed into the rotating drum at a constant rate.
• Ammonia/Steam Injection: Under the rolling bed of material, gaseous ammonia steam are injected. The resulting chemical heat and moisture soften the particles.
• Rolling & Agglomeration: As the drum rotates, the softened materials collide and adhere to each other, forming spherical "seeds" that grow into full-sized granules through centrifugal force.
• Discharge: The finished granules exit the drum and are conveyed to drying and cooling units to finalize their structural hardness.

As a specialized manufacturer, we focus on equipment longevity and process efficiency. Our designs prioritize minimized maintenance intervals and stable operational performance. We provide comprehensive layout designs and technical support to ensure the equipment integrates seamlessly into your existing production plant.