Usage: Double roller granulator is a fertilizer granulation machine that directly extrudes powdered materials into granules.
Production capacity: 1-5t/h
Granules Diameter: 2-10mm
Granular Shape: Oblate or irregular
Applicable Raw Materials: NPK compound fertilizers, compound fertilizers, chemical fertilizers, and mineral powders.
The double roller granulator is a piece of equipment that directly compresses powdered materials into granular fertilizer. It employs a dry extrusion process that requires no significant addition of water and no drying, and is widely used for granulating powdered materials such as NPK compound fertilizers, compound fertilizers, lime powder, bentonite, graphite powder, and coal powder. The equipment offers advantages such as high granulation efficiency, stable operation, robust construction, long service life, and easy maintenance, and can meet the continuous production needs of a wide variety of powdered materials.
Compared to other wet granulation equipment, the double roller granulator does not require a drying system, resulting in a simpler production process, lower energy consumption, and a smaller footprint, making it particularly suitable for projects with limited investment budgets or small- to medium-scale operations. The granules produced by this equipment are flat and round, typically ranging in size from 2 to 10 mm. The granule size can be flexibly adjusted by replacing the die according to production requirements. The granules are strong, resistant to breakage, and easy to package and transport. They are widely used in NPK compound fertilizer plants, compound fertilizer production lines, mineral powder granulation, chemical powder molding, and small-batch production, among other applications.
The standard production capacity of the double roller granulator ranges from 1 to 5 tons per hour, and you can select the appropriate model based on your production scale. Whether you plan to produce compound fertilizer or mineral powder granules, we offer customized solutions. Simply provide us with your target output, raw material types, site size, granule size, and process requirements, and our engineers will design an equipment configuration and production plan free of charge to help you achieve stable, efficient granule production at a lower cost.
1. Uniform Granule Size
Granules produced by the double roller granulator are of consistent size, with a particle diameter controllable between 2 and 10 mm, facilitating packaging, storage, and sales.
2. High Granule Strength
1. Formed through high-pressure extrusion, the granules have high density and are resistant to breakage, reducing losses during transportation and handling.
3. Regular Granule Shape
The finished granules are flat and round, with a neat and attractive appearance, which enhances product quality and market competitiveness.
4. Low Dust and Minimal Material Return
The finished granules have high integrity and low powder content, effectively reducing the material return rate and improving production efficiency.
5. Room-Temperature Granulation
The double roller granulator uses room-temperature extrusion granulation, eliminating the need for high-temperature drying, which helps preserve the active ingredients and original activity of the raw materials.
The working principle of the double roller granulator involves using a pair of counter-rotating rolls to generate strong compressive force, which forces the powdered material into the pockets (or grooves) on the roll surfaces for shaping. Under high pressure, the material is compressed and densified into compact shapes or flakes, which are then subjected to crushing and screening to ultimately produce uniform granules. The entire process requires no water addition or drying. By adjusting the roller gap and pressure, the equipment can control the density and particle size of the granules. Additionally, different roller shells can be used to produce granules of various shapes.
We offer a wide range of roller shells and can customize them to meet your specific requirements for granule shape and size. We will design a unique roller shell surface specifically for you, ensuring that your equipment consistently produces the granules you need. Whether you require flat-round, pillow-shaped, or rod-shaped granules, we can efficiently and reliably form them to meet your diverse and precise granule production needs. Additionally, the roller shells are made of high-chromium wear-resistant alloy or high-manganese wear-resistant alloy steel, offering high hardness, excellent wear resistance, and resistance to acid and alkali corrosion from fertilizers, ensuring a long service life.
This series of roller press granulators comes in multiple models, which can be selected according to the production needs of users or customized. The main technical parameters are shown in the table below:
| Model | DZJ-Ⅰ1.0 | DZJ-Ⅰ2.0 | DZJ-Ⅰ3.0 | DZJ-Ⅰ4.0 | DZJ-Ⅱ1.0 | DZJ-Ⅱ2.0 |
| Production Capacity（t/h） | 1~1.5 | 1.5~2.5 | 2~3 | 3~4 | 1~2 | 1.5~2.5 |
| Power(kw) | 15KW | 18.5KW | 22KW | 30KW | 15KW | 18.5KW |
| Pressure roller size | Φ150×220 | Φ150X300 | Φ186X300 | Φ300X300 | Φ150X220 | Φ150X300 |
| Feeding size | ≦0.5mm | ≦0.5mm | ≦0.5mm | ≦0.5mm | ≦0.5mm | ≦0.5mm |
| Finished product specifications | Φ2.5~Φ10 | Φ2.5~Φ10 | Φ2.5~Φ20 | Φ2.5~Φ30 | Φ2.5~Φ10 | Φ2.5~Φ20 |
| Material moisture | 2％~5％ | 2％~5％ | 2％~5％ | 2％~5％ | 2％~5％ | 2％~5％ |
With over 20 years of expertise, our double roller granulators have been operating reliably at more than 500 project sites worldwide, earning us a wealth of proven practical experience. From equipment design and R&D to system configuration planning, on-site installation guidance, and commissioning, we provide end-to-end, integrated engineering services and professional technical support throughout the entire process. Additionally, we deliver tailored solutions based on your raw material characteristics, production scale, site size, and process requirements—helping you continuously improve production efficiency and product quality, while ensuring your project operates safely, smoothly, and efficiently over the long term.
Our double roller granulators have been exported to more than 50 countries and regions worldwide, earning us extensive, proven experience in international logistics through long-term project collaborations. Our professional team manages the entire equipment shipment process—including standardized packaging, scientific container loading, international logistics coordination, and the preparation of complete shipping documentation—to ensure seamless coordination at every stage. Prior to shipment, each piece of equipment undergoes rigorous testing and reinforced packaging. Depending on the equipment specifications and customer requirements, we offer options ranging from reinforced wooden crates to direct loading into 20GP or 40HQ containers. Key components are securely fastened and protected to effectively minimize the risk of vibration and impact during transit. Whether the equipment is shipped to Africa, Southeast Asia, the Middle East, or South America, we are committed to ensuring safe and on-time delivery to help our customers quickly begin production and operations.
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