Disc granulators are key equipment in modern fertilizer production and have specific requirements for raw materials. Understanding these characteristics improves granulation efficiency and optimizes fertilizer quality.

1.Physical Properties and Particle Size
Materials should have a uniform particle size. Generally, over 80% of particles should be between 80 and 200 mesh. This moderate fineness ensures good rolling and granulation in the disc granulator, while also giving the final product strength.
2.Binding and Plasticity
Materials need some natural binding ability. Organic or inorganic components like humic acid or bentonite can significantly improve granulation rates. The sticky content should be between 5-20%. Too much makes pellets too large and hard; too little makes granulation difficult.
3.Chemical Composition Ratio
Raw materials must maintain a scientific balance of nutrients like N, P, and K, with total nutrient content generally not less than 25%. Avoid too many easily volatile or soluble components to prevent nutrient loss during granulation.

4.Heat Stability and Low Hygroscopicity
Materials must remain stable at granulation temperatures (50-80°C) without decomposing. Hygroscopicity (moisture absorption rate) should be below 15% to prevent clumping during storage.
5.Eco-Safety and Non-Polluting
Materials must meet environmental standards with heavy metals below limits, and be free of pathogens and weed seeds. Organic materials need thorough composting to avoid re-fermentation affecting pellet stability.

Selecting materials meeting these criteria, combined with a high-performance disc granulator, produces uniform, strong pellets with stable nutrient release. This meets the precision fertilization needs of modern agriculture.