The disc granulator is a core piece of equipment in fertilizer production. Its effectiveness is closely tied to the material's properties. Understanding what the machine needs from the material is crucial for good granule quality and efficient production.

Material Physical Requirements

1.Particle Size Distribution

Ideal Range: 80-200 mesh (0.075-0.2mm)

Too Coarse: Poor balling rate, rough surface finish.

Too Fine: Excessive dust, poor flowability.

2.Moisture Content Control

Best Range: 8-15%

Too High: Prone to clumping, hinders ball formation.

Too Low: Insufficient stickiness, loose granules.

3.Material Density

Suitable Range: 1.2-1.8 g/cm³

Uneven Density: Leads to inconsistent granule size.

Material Chemical Requirements

1.Content of Sticky Substances

Needed Stickiness: 5-15% sticky components required.

Not Enough: Add binders like bentonite or lignin.

Too High: Blend in dry auxiliary materials to adjust.

2.pH Range

Working Range: 5.0-8.0

Too Acidic: Corrodes equipment, affects ball formation.

Too Alkaline: Material hardens easily.

Material Mixing Ratio and Pre-Treatment Requirements

1.Raw Material Ratio Principle

Basic Formula: 70% main material + 20% auxiliary material + 10% binder.

NPK Fertilizers: Ensure uniform mixing of all elements.

2.Pre-Treatment Requirements

Mixing Uniformity: CV value ≤ 5%.

Temperature Control: Maintain 40-60°C.

De-Ironing: Avoid metal impurities damaging equipment.

Understanding these material requirements for the disc granulator is key to stable operation. By scientifically controlling the material and optimizing parameters, you can maximize the disc granulator's performance and produce high-quality fertilizer granules that are uniform and meet strength standards.