In today’s agricultural industry, Double Roller Granulator machines have become a cornerstone of efficient compound fertilizer and organic fertilizer manufacturing. This dry granulation technology offers a clean, energy-saving, and customizable solution for producing high-quality fertilizer granules.
LANE Heavy Industry, a professional fertilizer equipment manufacturer, provides a full range of Double Roller Granulators equipped with wear-resistant roller shells, customized accessories, and even Cummins motor options to meet various production needs around the world.
What Is a Double Roller Granulator?
A Double Roller Granulator (also called a dry extrusion granulator) is a compact, efficient fertilizer granulation machine. It works by compressing powdery materials between two rotating rollers that form the material into solid granules through mechanical pressure — without using any liquid binder or heat.
Unlike wet granulators, the double roller type requires no drying process, making it ideal for energy-efficient, continuous fertilizer production lines.
Typical Applications
NPK compound fertilizer
Urea-based or ammonium chloride-based fertilizer
Organic fertilizer and biofertilizer
Chemical and mineral powders
Feed or additive granulation
Structure and Working Principle
The LANE Double Roller Granulator consists of several precision-engineered components:
Feeding System – Feeds powder material evenly into the roller area.
Press Rollers (Roller Shells) – The heart of the machine. Two counter-rotating rollers compress the material into granules.
Transmission System – Connects the rollers with an electric motor and gearbox to maintain consistent torque and speed.
Crusher & Screening System – Breaks large agglomerates and separates fine powder for recycling.
Frame & Housing – Sturdy steel structure ensuring vibration-free operation.
Working process:
Powder enters the feeding zone → high pressure is applied between the two rollers → materials are compacted into sheets → sheets are crushed and screened → qualified granules are collected for packaging.
High-Quality Roller Shells (Roll Skins) and Custom Patterns
The roller shell is the most critical component of a Double Roller Granulator.
LANE uses alloy steel and stainless steel materials with advanced CNC machining and heat treatment technology to ensure:
Long wear life
Strong corrosion resistance
Precise granule patterning
Smooth compression for uniform particle size
Customers can customize the roller surface design to match their formula or product appearance.
Popular roller mold shapes include:
Oval, pillow, or irregular shapes
NPK patterns
Flat surface granules for ammonium chloride or ammonium sulfate
Each roller shell can last for thousands of working hours, and LANE provides one free set of spare parts (including roller skins or seals) for every complete machine order.
Customizable Components and Optional Power Systems
Every LANE Double Roller Granulator can be tailored to meet the customer’s factory environment and material requirements.
Available options include:
Customized roller patterns and material hardness
Carbon steel or stainless steel body for corrosion resistance
Variable speed control system for adjusting granule size and hardness
Cummins Motor Option — customers can select a Cummins diesel engine for enhanced power stability, especially useful in regions with unstable electricity
Adjustable pressure system — to optimize granule density
LANE’s R&D team can also design special rollers to suit high-salt or bio-organic materials to prevent corrosion and sticking.
Production Process of Fertilizer with Double Roller Granulator
The Double Roller Granulator is typically used in a dry fertilizer granulation line.
A complete process includes:
Raw Material Batching: Ingredients like urea, ammonium sulfate, potassium chloride, and phosphates are accurately weighed using an automatic batching system.
Mixing: Materials are mixed evenly by a fertilizer mixer (e.g., horizontal or vertical mixer).
Granulation: The mixture enters the Double Roller Granulator, where high pressure transforms it into solid granules.
Crushing and Screening: Granules are sized properly using a rotary screener; oversized particles are crushed and recycled.
Coating and Packaging: Optional coating machine adds anti-caking protection before final packaging.
This line is simple, compact, and efficient, with low investment and quick return.
Key Advantages of LANE Double Roller Granulator
Dry granulation – No need for heating, drying, or water
Energy-saving – 40% less energy consumption than wet granulation
Compact and reliable structure – Easy installation and maintenance
High granulation rate – Over 85% qualified granules
Customizable roller molds – Match any formula or shape
Long lifespan – Hardened roller shells resist abrasion
Optional Cummins motor – Reliable and globally serviced
Free spare parts – One set provided per order
Wide adaptability – Works with both chemical and organic materials
Applicable Materials
The LANE Double Roller Granulator is compatible with a broad range of materials, such as:
Urea, ammonium sulfate, ammonium chloride
Potassium chloride, potassium sulfate
Phosphate and dolomite powder
Organic fertilizer powder (chicken manure, compost, etc.)
Bentonite, kaolin, zeolite
Feed and additive materials
This versatility makes it suitable for both small farms and industrial fertilizer plants.
Project Case: 10 T/H NPK Fertilizer Line in Indonesia
One of LANE’s recent projects involved a 10-ton-per-hour NPK fertilizer production line in Indonesia.
The customer required a fully automatic dry granulation system to process local raw materials.
LANE provided a complete solution with:
DZJ-4 Double Roller Granulator
Cummins diesel motor system (for off-grid operation)
Custom roller pattern for 4mm pillow-shaped granules
Automatic batching and screening system
After installation and training, the production line achieved a granulation rate of 90% and reduced operating costs by 30% compared to wet granulation.
After-Sales Support and Spare Parts Service
LANE ensures that every customer enjoys long-term technical and spare parts support.
Our service includes:
On-site installation and commissioning
Roller shell replacement and pattern customization
Maintenance training for local operators
Free spare parts and fast shipping
Remote video guidance and lifetime technical support
With global clients in India, Indonesia, Zambia, Nigeria, and South America, LANE has built a strong reputation for reliability and performance.
About LANE Heavy Industry
Henan LANE Heavy Industry Co., Ltd. is a leading manufacturer of fertilizer machinery specializing in:
Organic fertilizer production lines
Compound fertilizer production lines
Granulators (disc, rotary drum, double roller, and flat die types)
Compost turners and mixers
Our equipment is CE and ISO-certified and exported to more than 40 countries.
We focus on efficiency, durability, and customer satisfaction.
Conclusion
The Double Roller Granulator is a smart investment for any fertilizer manufacturer seeking a low-cost, high-efficiency dry granulation solution.
With its custom roller shells, free spare parts, and optional Cummins power system, it meets diverse customer demands from small-scale operations to industrial production lines.
If you’re planning to start or upgrade your fertilizer business, LANE’s engineering team is ready to provide turnkey solutions tailored to your specific needs.
For more details, please feel free to contact us.
Henan Lane Heavy Industry Machinery Technology Co., Ltd.
Email: sales@lanesvc.com
Contact number: +86 13526470520
Whatsapp: +86 13526470520