Double Roller Extrusion Granulator Unit for Organic Fertilizer Granulation

The Double Roller Extrusion Granulator, also known as a Dry Granulation Machine or Roll Press Compactor, is an advanced industrial equipment designed for transforming fine powders into dense, uniform granules without the need for liquid binders. This machine utilizes the principle of Roll Press Compaction, where two synchronized, counter-rotating rollers apply extreme mechanical pressure to the raw material, forcing it through precisely designed molds (roll surfaces). The resulting product is sheet-like material that is then broken down and screened into uniform granules.

This Granulation Equipment is widely recognized for its efficiency in Material Densification, making it a preferred choice in industries such as fertilizer production, chemical processing, and mineral agglomeration. It is a cornerstone of modern Continuous Granulation Processes, offering a clean, economical, and scalable solution for Powder to Granules conversion.

• Dry Granulation Process: Produces granules without adding moisture or liquid binders, eliminating the need for subsequent drying steps.
• High Pressure Roller Compaction: Equipped with robust rollers and powerful hydraulic/spring-pressure system for hard, low-moisture granules.
• Excellent Material Densification: Increases bulk density of raw materials, improving storage and transportation efficiency.
• Continuous and Automated Operation: Designed for seamless integration into production lines with high throughput.
• Versatility and Adaptability: Processes various materials including fertilizers, chemicals, and minerals with customizable granule size/shape.
• Environmentally Friendly: Closed system minimizes dust pollution and avoids wastewater generation.
• Low Maintenance and Robust Construction: High-wear-resistant materials ensure long service life and reduced downtime.

Fertilizer Granulation: Ideal for producing high-quality compound fertilizers, NPK fertilizers, organic-inorganic compound fertilizers, and other blended fertilizers.

Chemical Granulation: Used for granulating pigments, dyes, resins, pesticides, and other chemical powders.

Mineral and Metal Industry: Applied for agglomerating metal powders, coal fines, carbon black, and various ores.

Pharmaceutical and Food Industry: For dry granulation of powder formulations to improve compression characteristics.

Other Industries: Used in ceramics, refractories, and recycling of industrial by-products.

1. Feeding: Raw powder material is fed uniformly into the granulator's hopper.
2. Compaction Zone: Material enters the gap between two counter-rotating rollers.
3. High-Pressure Extrusion: Rollers exert high pressure, compacting material into solid sheet.
4. Formation of Sheet/Ribbon: Compacted material exits as thin, dense sheet with specific patterns.
5. Crushing and Sizing: Sheet is broken down into smaller fragments and screened for uniform granules.
6. Recycling: Fines and oversized particles are recycled back to the feeding system.
7. Final Product Output: Uniformly sized granules are discharged as final product.

For better granule quality, this equipment can be used with a spheroidizing machine for spherical shaping and polishing, or integrated into a complete automated granulation production line for fully automated production.

Complete double-roll extrusion granulation production line

As a leading agricultural equipment supplier with extensive export experience, Gaofen Machinery offers:

• Agricultural Equipment Supply including various fertilizer granulators and complete production lines
• Expert Technical Support for equipment selection and process optimization
• Professional Installation & Commissioning services
• Comprehensive Training Services for operational and maintenance skills
• Reliable After-Sales Service including maintenance and spare parts
• Customized Solutions for specific production requirements

Contact us today to explore partnership opportunities and discover how our innovative agricultural machinery and solutions can drive your success.