In the field of organic fertilizer production, granulation is a key step to convert composted organic materials into uniform, easy-to-handle pellets. Among the various granulation technologies available, the double roller granulator stands out as an efficient, energy-saving, and cost-effective solution—especially for small to medium-scale production lines.
What Is a Double Roller Granulator?
A double roller granulator working process belong to dry granulation that uses physical extrusion to form pellets. Unlike wet granulators that require drying processes, this machine works at room temperature without the need for water or binders. It presses powdery organic material between two counter-rotating rollers, each engraved with matching molds to form specific pellet shapes and sizes.
Advantages of Double Roller Granulator
Using double roller pellet machine for organic fertilizer granulation has the following advantages.
1. Dry Granulation – No Drying Needed
This machine produces hard, dense granules without additional heating or drying, saving energy and reducing operating costs.
2. Low Investment, High Efficiency
Its simple design means lower equipment costs, reduced space requirements, and minimal maintenance. Ideal for startups or farms looking to begin fertilizer granulation.
3. Customizable Molds
The roller mold shapes can be customized, allowing for different pellet sizes and shapes, usually 3–10 mm in diameter. In addition, there are carbon steel and stainless steel types for your choice.
4. Wide Material Compatibility
Suitable for composted animal manure (chicken, cow, pig), crop straw powder, kitchen waste compost, and other organic materials with moisture content below 10%.
Working Process
1. Feeding: Powdered organic fertilizer is fed into the machine.
2. Extrusion: Two rollers compress the material into solid granules under high pressure.
3. Discharge: The formed pellets fall and are collected, with fines returned for reprocessing.
This simple yet effective process ensures high granulation efficiency, with a typical granule formation rate of 85%–95%.
Capacity and Cost
Double roller granulators are available in various capacities:
- Small units: 1–2 tons/hour
- Mid-sized models: 3–5 tons/hour
The roller press equipment price usually ranges from $2,000 to $10,000, depending on capacity, roller design, and automation level.
Ideal for Compact Organic Fertilizer Plants
For farms or fertilizer producers looking for a clean, compact, and low-cost granulation solution, the double roller granulator offers an excellent option. Its dry process makes it especially attractive in areas with limited access to drying equipment or high electricity costs.
If you are interested in the project, you can visit https://organicfertilizerproductionline.com/double-roller-granulator/