In modern animal husbandry and feed production, ring die pellet mills have become an indispensable core piece of equipment for feed processing, thanks to their excellent pelletizing performance and wide adaptability to raw materials. As core equipment for biomass pellet fuel production, ring die pellet mills are becoming a “must-have” for global biomass energy companies due to their high efficiency, stability, and flexibility. This article will comprehensively introduce the working principle, technical features, model specifications, and application areas of ring die pellet mills.
With the efficient development of large-scale breeding and feed industry today, ring die pellet machine is becoming an indispensable key equipment in the field of feed processing due to its excellent performance and wide adaptability.
A ring die pellet mill is a core device that uses the extrusion action of a ring die and rotating rollers to process biomass materials such as agricultural and forestry waste (such as wood chips, घास, and rice husks), industrial waste (such as palm oil shells and sugarcane bagasse), or feed ingredients (such as corn stalks and distiller’s grains) into high-density, stable calorific value pellets for fuel or feed.
The ring die pellet mill operates in four steps: raw material crushing → conditioning and mixing → high-pressure forming → pellet cooling. The resulting pellets are compact, high in calorific value, and easy to transport and store. They are widely used in home heating, industrial boiler power generation, biomass power generation, and livestock and poultry feed production.
| नमूना | AHLH250 | AHLH320 | AHLH350 | AHLH400 | AHLH420 | AHLH508 | AHLH678 | AHLH768 |
| शक्ति (किलोवाट) | 21 | 37/45 | 55 | 75/90 | 90/110 | 110/132/160 | 220 | 250/280/315 |
| क्षमता (T/H) | 0.5-1.5 | 2-6 | 3-7 | 3-12 | 3-15 | 6-20 | 15-25 | 15-35 |
| Inner diameter of ring mold（mm) | Φ250 | Φ300 | Φ350 | Φ400 | Φ420 | Φ508 | Φ673 | Φ762 |
The overall process can be divided into three stages: raw material conditioning, die-roller extrusion, and pellet cutting and output.
Crushed agricultural and forestry waste (such as wood chips and straw) or feed ingredients enter the pelletizing chamber through a forced feeding device. The conditioner mixes steam or water to increase the temperature and humidity of the raw materials, enhancing their plasticity.
The ring die is driven by a main motor, and the rollers rotate synchronously due to friction. Centrifugal force forces the material against the inner wall of the ring die, resulting in a three-stage compression process: initial accumulation in the feeding zone.
Density increase in the deformation and compaction zone, and high-pressure extrusion into the die holes in the extrusion zone.
A rotary cutter cuts the pellets into pre-set lengths (usually 5-20 मिमी). The finished products are discharged after cooling.
Faced with the uneven quality of pellet mills on the market, we, based on more than a decade of machinery manufacturing experience and customer feedback from over 50 countries around the world, have created a ring die pellet mill with the four major labels of “efficiency, durability, intelligence, and adaptability,” redefining the industry standard.
The main drive utilizes high-precision gears and employs either a quick-release ring die or anchor-type drive, increasing output by approximately 20% compared to belt-type drives.
The machine’s transmission components (including the motor) utilize high-quality bearings from Switzerland and Japan, ensuring high transmission efficiency, smooth operation, and low noise.
The large, reinforced, all-stainless steel feed conditioner utilizes variable frequency drive to ensure high pellet quality.
Based on different customers’ feedstock characteristics (such as moisture content and particle size) and production capacity plans, we offer modular ring die pellet mills: Basic models with a capacity of 2-5 tons/hour are suitable for small processing plants;
Standard models with a capacity of 8-15 tons/hour are suitable for medium-sized biomass projects; and Custom models with a capacity of over 20 tons/hour meet the needs of large energy groups.
आगे, the equipment supports intelligent feedstock moisture adjustment (accommodating feedstock with a moisture content of 8%-18%), enabling direct production without the need for additional drying equipment, reducing initial investment costs by 30%.
The feed is processed in a ring die pellet machine, which produces a moderate temperature rise. This effectively preserves the trace elements in the raw materials, improves palatability, increases animal intake, and facilitates digestion and absorption of various nutrients.
The pellets produced are uniform in composition, neat in appearance, and smooth in surface.
Pellet diameter and length are adjustable (requiring die replacement). This flexibility meets the needs of various aquaculture species at different growth stages.
Processed fish feed can remain in the water for a longer period of time, improving feed utilization and helping to prevent water pollution.
Ring die pellet mills have a wide range of applications, including the following:
They can process pellets for pigs, cattle, sheep, rabbits, मुर्गियां, ducks, and fish, making them suitable for the production of various livestock and poultry feeds and aquatic feeds.
They can crush eucalyptus, pine, birch, poplar, fruit trees, crop straw, and bamboo chips into sawdust-like chaff and process them into biomass fuel pellets.
They can crush eucalyptus, pine, birch, poplar, fruit trees, crop straw, and bamboo chips into sawdust-like chaff and process them into biomass fuel pellets.
They are suitable for pressing materials that are difficult to bond and form, such as rice husks, sunflower seed shells, peanut shells, and other fruit and vegetable shells; various wood waste materials such as branches, trunks, and bark; various crop straws; and various chemical raw materials such as rubber, cement, and ash.
1. Select a model based on production requirements: For small-scale farmers, a 250 या 320 model is sufficient to meet daily needs; for medium-sized feed processing plants, a 350 या 400 model is recommended; for large-scale industrial production, an HKJ420 or higher-capacity model should be selected.
2. Consider the characteristics of the raw materials: For lightweight fibrous raw materials (such as sawdust and rice hulls), a vertical ring die pellet machine is recommended, as its vertical feed design is more suitable for these materials.
3. Pay attention to equipment materials and craftsmanship: Choose rollers and ring dies made of alloy steel and specially treated to ensure high quality, लंबा जीवन, and excellent results.
4. Investigate after-sales service: Choose a company that offers comprehensive “three guarantees” to ensure long-term and stable operation of the equipment.
As core equipment for feed processing and biomass pellet production, ring die pellet machines are increasingly mature and their performance is continuously improving, playing a vital role in various fields. With the scale-up of the livestock industry and the rapid development of the feed industry.
Ring die pellet machines will continue to innovate and upgrade, providing more efficient and reliable equipment support for related industries and promoting the modernization of agricultural production. Choosing the right ring die pellet machine not only improves product quality and production efficiency, but also significantly reduces production costs and enhances market competitiveness.
As a professional ring die pellet machine supplier, we are committed to providing you with reliable biomass pellet and feed pellet production solutions with over a decade of technical expertise and global service experience, making us your most trusted partner. Contact us today for customized equipment solutions and professional advice.
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