Double roller press granulators are efficient and energy-saving dry granulation machines widely used in fertilizer production. They shape powdery materials by mechanical pressing, without needing binders or a drying step. They work well for granulating many types of fertilizers.
1.Organic Fertilizers
Livestock Manure Organic Fertilizer: Composted organic material forms stronger granules with less dust, making it easier to store and apply.
Bio-organic Fertilizer: Low-temperature extrusion protects the activity of added functional microbes, avoiding damage from high heat.
Humic Acid Fertilizer: Extrusion helps keep the humic acid active and improves fertilizer efficiency.
2.Inorganic and Compound Fertilizers
Compound Fertilizers (NPK): Suitable for granulating high, medium, and low-concentration NPK blends, especially good for secondary processing after tower granulation.
Slow-Release Fertilizers: After extrusion, granules can be coated to extend fertilizer release and improve nutrient use.
Micronutrient Fertilizers (like Boron, Zinc): Double roller press granulators prevent ingredient separation, ensuring even nutrient distribution.
3.Specialty Functional Fertilizers
Water-Soluble Fertilizers: Granules dissolve well after extrusion, suitable for modern farming like drip irrigation or foliar spray.
Soil Conditioners (like Silicate Fertilizers): Extrusion improves granule hardness, reducing breakage during transport.
Biochar-Based Fertilizers: Combining biochar’s absorbency with nutrients, extrusion boosts product stability.
In short, double roller press granulators are efficient, energy-saving, and adaptable. They’re suitable for making granules from organic fertilizers, compound fertilizers, water-soluble fertilizers, and many others. They can optimize granulation for both traditional fertilizers and new functional types.