Fertilizer granulation is a critical step in fertilizer production. Choosing the right granulation equipment depends on raw material properties, production scale, particle requirements, and budget. Below are common fertilizer granulation machines and their features for reference:
 
1. Disc Granulator (Pan Granulator)  
- Principle: Materials are tumbled on a rotating inclined disc while a binder is sprayed to form granules.  
- Applications:  
  - Organic fertilizers, compound fertilizers, biofertilizers.  
  - Granule size: 2–8 mm; suitable for small to medium-scale production.  
- Advantages: Simple structure, easy operation, produces rounded granules.  
- Disadvantages: Low output capacity; requires drying equipment.  
 
2. Rotary Drum Granulator  
- Principle: Materials roll inside a rotating drum, agglomerated by steam or binders.  
- Applications:  
  - Large-scale production of compound fertilizers, urea, ammonium phosphate.  
  - Uniform granules; ideal for continuous high-volume operations.  
- Advantages: High output, high automation.  
- Disadvantages: Large equipment footprint, high energy consumption.  
 
3. Extrusion Granulator (Dry Granulator)  
- Principle: Dry powder is compressed into granules via mechanical pressure.  
- Applications:  
  - Organic/compound/mineral fertilizers.  
  - Suitable for low-moisture materials; no drying required.  
- Advantages: Energy-efficient, produces dense granules.  
- Disadvantages: Limited shape options (e.g., cylindrical or flat).  
 
4. Double Roller Granulator  
- Principle: Two rollers press materials into molds to form granules.  
- Applications:  
  - Organic fertilizers, compound fertilizers, humic acid.  
  - Cold-press process without heating.  
- Advantages: High granule strength; no drying needed.  
- Disadvantages: High mold wear and maintenance costs.  
 
5.Spray Granulation Machine
- Principle: Liquid is atomized through nozzles and combined with powder in a Spray Granulation Machine.  
- Applications:  
  - compound/mineral fertilizers. .  
  - Small granules (0.5–3 mm); ideal for high-value products.  
- Advantages: Uniform granules, excellent solubility.  
- Disadvantages: Complex equipment, high investment cost.  
 
6. Flat Die Granulator  
- Principle: Materials are extruded through a flat die and rollers.  
- Applications:  
  - Organic fertilizers, feed, biomass fuels.  
  - Suitable for small/medium-scale production; granule size: 3–12 mm.  
- Advantages: Handles fibrous materials well.  
- Disadvantages: Rough granule surfaces.  
 
7. Rounding Machine (Auxiliary Equipment)  
- Principle: Shapes extruded or roller-pressed granules into spheres.  
- Applications: Improves granule roundness and marketability.  
- Pairing: Often used with extrusion granulators.  
 
Key Factors for Equipment Selection  
1. Material Properties: Moisture, stickiness, composition (organic/inorganic).  
2. Production Capacity: Small-scale (<1 ton/hour) vs. large-scale (>5 tons/hour).  
3. Granule Requirements: Shape (spherical/cylindrical), strength, size.  
4. Process Integration: Need for drying, cooling, or screening.  
5. Budget: Equipment cost and operating expenses.