Ring Die Pellet Mill — High Efficiency Biomass Pellet Machine
The ring die pellet mill is one of the most advanced and efficient machines for producing high-quality biomass pellets, wood pellets, and organic fertilizer pellets. Designed for continuous production, it delivers stable performance, uniform pellet density, and high output capacity ranging from 500 kg to 5 tons per hour.
Whether you are running a small-scale pellet workshop or a large biomass processing plant, this machine provides an ideal solution for converting raw biomass materials into clean, renewable fuel pellets.
A variety of specifications can be selected and filtered：
| Model | Capacity (t/h) | Motor Power (kW) | Pellet Diameter (mm) | (Weight (kg) |
| XZ-450 | 0.5-0.6T/H | 55kW | 6-12mm | 3.5T |
| XZ-470 | 0.6-1T/H | 75kW | 6-12mm | 4T |
| XZ-560 | 1-1.2T/H | 90kW | 6-12mm | 5.8T |
| XZ-580 | 1.5-1.8T/H | 110kW | 6-12mm | 5.9T |
| XZ-650 | 1.8-2T/H | 132kW | 6-12mm | 6.5T |
| XZ-700 | 2.5-2.8T/H | 160kW | 6-12mm | 7.5T |
| XZ-750 | 2.8-3T/H | 185kW | 6-12mm | 7.8T |
| XZ-850 | 3-3.5T/H | 250kW | 6-12mm | 11T |
| XZ-880 | 5T/H | 315kW | 6-12mm | 16T |
⚙️ Working Principle of Ring Die Pellet Mill
The working process of a ring die pellet machine is based on strong compression. Inside the machine, the rollers rotate inside the ring die, pressing the raw material through the die holes to form cylindrical pellets (6–12 mm in diameter). The pellet length can be adjusted according to the user’s requirements.
This high-pressure extrusion allows sawdust, wood chips, straw, rice husks, peanut shells, palm shells, coconut shells, and many other types of agricultural or forestry residues to be densified into energy-dense pellets suitable for burning or further processing.
🔧 High Forming Efficiency & Output Capacity
Modern ring die pellet machines often feature double-layer or multi-layer dies, increasing the compression surface area and production efficiency.
With a robust transmission system and continuous feeding design, the machine can operate stably for long periods, making it ideal for industrial-scale pellet production.
This makes it a perfect choice for those who need high daily output—even up to 50 tons of pellets per day with a full production line.
Internal structure of a ring mill wood pellet mill
Made of high-strength alloy steel, the material is more wear-resistant and has a longer service life.
Superior Pellet Quality and Density
The uniform compression between rollers and ring die ensures that each pellet is dense, smooth, and uniform in length.
Longer die holes keep material inside for adequate heating and softening of lignin, enhancing binding strength and pellet durability.
The final pellets are high in calorific value, easy to store, and resistant to moisture absorption—perfect for commercial biomass fuel.
Wide Material Compatibility
This biomass pellet machine can process a wide variety of raw materials, including:
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Sawdust, wood shavings, and wood chips
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Hardwood or softwood residues
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Rice husk, wheat straw, corn stalks, sugarcane bagasse
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Palm kernel shell, coconut shell, and bamboo waste
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Grass, alfalfa, and agricultural residues
The ring die structure provides enough compression force to handle even hard-to-press materials, such as hardwood or eucalyptus.
So whether you are making wood pellets, straw pellets, or fertilizer pellets, this ring die pellet mill is the right choice.
Easy Maintenance and Durable Design
Although the die and roller are wear parts, the design allows for quick replacement and easy maintenance.
The entire structure is made from high-strength alloy steel, ensuring long service life and stable operation under continuous use.
This not only reduces maintenance downtime but also improves production efficiency.
High Transmission Efficiency
Most of our ring die pellet machines use precision gear transmission systems instead of belt drives.
This ensures higher energy efficiency, stronger torque, and lower energy loss, helping users achieve lower cost per ton of pellets.
💡 Advantages Compared with Flat Die Pellet Mill
While both flat die and ring die pellet machines can produce biomass pellets, the ring die type offers:
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Higher capacity and efficiency
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More uniform pellet density
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Longer die life and less wear
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Better performance for large-scale or hard materials
If you’re wondering “Which is better, ring die or flat die pellet mill?”, the ring die model is the professional choice for medium to large production lines.
🌍 Applications
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Wood pellet production lines
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Biomass fuel factories
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Organic fertilizer granulation
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Straw pellet and agricultural waste recycling plants
With proper configuration, it can be integrated into a complete biomass pellet production line, including dryers, conveyors, coolers, and packing machines.
🏭 Why Choose Us — Henan Xuezhao Machinery Co., Ltd.
As a professional ring die pellet mill manufacturer with years of industry experience, Henan Xuezhao Machinery provides:
✅ Advanced manufacturing technology
✅ Professional after-sales service and spare parts support
✅ Custom production line design according to your materials and capacity
✅ Stable performance, competitive prices, and proven customer satisfaction
We’ve helped clients around the world build reliable and profitable biomass pellet production systems.
📞 Contact Us for the Best Quotation
Looking for the best ring die pellet mill price or need a custom biomass pellet solution?
Contact us today for a free consultation and quotation!
👉 Henan Xuezhao Machinery Co., Ltd.
We deliver high-quality pellet machines at factory-direct prices — helping you start efficient and sustainable biomass fuel production.
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