RDF Pellet Mill
Introduction to the RDF Pellet Mill
Various types of waste can be directly burned. However, the quality of combustion is another matter. RDF raw materials may come from various sources, with varying moisture content and sometimes containing impurities. During actual combustion, this can easily lead to unstable flames, affecting combustion efficiency.
Therefore, we need equipment capable of processing various mixed raw materials. The RDF pelletizer is such a device. Leveraging its strong adaptability, it transforms mixed raw materials into dense RDF pellets that can burn stably. This successfully turns waste into a high-value commodity.
RDF pellet mills seamlessly integrate into a complete RDF pellet production line. This is key to helping you achieve stable, large-scale production. We offer comprehensive production services. You can inform us of your raw material requirements, such as yield, and we will provide you with a scientifically sound production plan free of charge.
How does an RDF pellet mill work?
Why can an RDF pellet mill produce high-quality RDF pellets? This is thanks to its precise operating process.
After the raw material enters the pelleting chamber, the pressure rollers force it into the ring die orifice. The die orifice is the key factor determining the pellet diameter. You can freely choose the diameter of RDF pellets between 4-12mm. For example, you might initially want to produce 6mm pellets suitable for small boilers, but later want to produce pellets of various sizes. You don’t need to change the entire machine; you only need to change the die.
The raw material exiting the die orifice will be in a long strip shape, at which point the cutter will quickly cut it into pellets of various lengths.
Technical Structure of RDF pellet mill
To handle a variety of challenging raw materials, we have upgraded the materials and technology of our RDF pellet mill. The entire machine and its components have passed rigorous international ISO and CE quality tests. Even with frequent fluctuations in your raw material composition, you can achieve stable operation and output using this equipment.
Anti-arching feeder
This component feeds the raw materials into the pellet mill. Below the anti-bridging feeder, there is also a feeding auger that automatically adjusts the feeding speed. These two components together minimize raw material loss.
Forced feeder
The forced feeder’s internal blades grip the raw material and forcefully push it into the pelleting hopper. It is well-suited for handling various powders, waste materials, or lightly loose garbage.
High wear-resistant alloy steel
Waste materials often contain. Therefore, we upgraded all components in the pelleting hopper to alloy steel, which can reduce the cost of frequent component replacements.
Gearbox
We use a heavy-duty, hardened gearbox. When processing various materials mixed together, the RDF pellet machine is prone to feeding jams and jamming. A robust gearbox can buffer impact forces and prevent damage to critical components.
Siemens Motors
Siemens motors use frequency conversion systems. You can adjust the speed to match different operating conditions and raw material ratios. This ensures that you neither waste energy due to excess power nor experience disruptions to the granulation process due to insufficient power.
Safety overload device
Under complex operating conditions, the biggest concern is that if a jam or overload occurs and is not detected in time, the entire equipment may become unusable. Therefore, we installed a safety pin on the RDF pellet mill. It automatically breaks to stop the machine, reducing further damage to components.
Various models of RDF pellet mills
When producing RDF pellets, you need to select the appropriate RDF pelletizer. A mismatch between the equipment model and capacity can easily lead to low production efficiency and energy waste. Therefore, we offer several standard capacity models to allow manufacturers of different sizes to choose flexibly. Of course, we also support customized outputs to meet different production needs. Please feel free to contact us at any time.
| Model | MZLH320 | MZLH350 | MZLH420 | MZLH520 | MZLH678 | MZLH768 |
| Main Motor Power(kw) | 22 | 37 | 90 | 132 | 200 | 250 |
| Anti-arching Feeder Power(kw) | 2.2 | 2.2 | 3 | 3 | 3 | 4 |
| Forced Feeder Power(kw) | 0.75 | 0.75 | 1.5 | 1.5 | 1.5 | 1.5 |
| Ring Die Inner Diameter(mm) | 320 | 350 | 420 | 520 | 673 | 762 |
| Finished Particle Diameter(mm) | 4~12 | |||||
| Output (T/H) | 0.2-0.3 | 0.3-0.5 | 1.0-1.2 | 1.5-2.0 | 2.5-3.0 | 3.0-4.0 |
(Standard output may vary depending on the condition of the raw materials. Specific parameters need to be determined based on actual production conditions.)
What raw materials are suitable for RDF pellet mills?
RDF pellet mills can handle a wide variety of complex raw materials. You can choose the most affordable materials, as this machine can process them all. With proper raw material processing, the resulting pellets can be used in various fields, including industrial combustion and residential heating.
Waste textiles:
- Old clothes, fabric scraps, synthetic fibers, masks, etc.
- These raw materials have a calorific value of 4500-5500 kcal/kg, making them suitable as the main raw material for RDF. However, these materials may contain impurities such as buttons and metal, so cleaning the raw materials before pelleting is essential.
plastics
- Plastic bags, packaging films, woven bags, etc.
- When screening these raw materials, it is crucial to strictly control the PVC content, otherwise it can easily corrode equipment. This material has a high calorific value but degrades rapidly, so when making RDF pellets, it is best to add sawdust, cardboard, etc, to stabilize the combustion rate.
waste cardboard and wood
- Raw materials: Composed of paper, plastics, wood materials, textile waste, and some municipal combustible waste.
- These are high-quality raw materials for RDF pelleting. They burn stably and have a high pelleting rate. They act as excellent stabilizers during RDF pellet production. When handling them, care should be taken to control their moisture content and length.
Mixed Industrial Combustible Waste
- Automotive interior trim, leather scraps, shoe soles, dyeing and printing waste, and dismantled appliance materials
- This is a commonly used auxiliary material to increase the overall calorific value of RDF pellets. However, this type of man-made industrial waste may contain hazardous substances, so it cannot be used in large quantities. Furthermore, most of these materials are quite hard and require two crushing processes to meet pelletizing standards.
Household waste
- A mixture of various waste materials
- While it is inexpensive and widely available, its quality fluctuates greatly, and each batch of household waste may be different, so strict sorting and classification are necessary. This type of waste may contain raw materials with high moisture content, such as wet paper and wet clothes, so it still needs to be dried in a dryer to reduce the moisture content to below 18%.
Production process of the RDF pellet line
RDF pellet mills can compress various combustible solid wastes. However, for RDF pellets to be successfully formed, the raw materials still need to undergo a series of pretreatment processes, such as crushing and drying. This ensures the raw materials reach the optimal state for extrusion and bonding, resulting in compact pellets with minimal powder and excellent fire resistance. Below is the complete RDF granulation process for your reference.
1
Raw material cleaning
Firstly, different cleaning equipment removes metals and stones from the raw materials. This ensures the safety of the granulation production line equipment.
2
Crushed raw materials
If large raw materials are fed directly into the RDF pelleting mill, it can easily cause the machine to jam. Therefore, we equip the mill with a pulverizer for such raw materials. This equipment will turn the raw materials into fine powder of 3-5mm.
3
Raw material drying
This step is ideal for raw materials with high moisture content. The hot air inside the dryer removes moisture from the surface of the raw materials, thus improving granulation stability.
4
Pelletizing section
RDF pellet mills are ideal equipment for pelletizing. The high temperatures generated by extrusion and friction soften the fibrous materials in the raw materials, making them suitable for binding. The resulting pellets are strong and not easily broken.
5
Cooling section
The cooling machine allows the granules to quickly solidify and set, preventing them from easily breaking during transportation. At the same time, the cold air reduces the moisture content of the granules, making them less prone to mold and effectively extending their shelf life.
6
Finished product packaging
Depending on your production scale, you can choose between automated and manual packaging. Automated packaging is more suitable for large-scale commercial production, as it can further improve production efficiency and reduce labor costs. For small-scale production lines or startups, manual packaging offers lower investment and greater operational flexibility, making it a more suitable option.
Global Case Studies of RDF Pellet Mill
With on-site project experience in over 140 countries and regions worldwide, we have a deeper understanding of RDF pelletizing needs under different operating conditions. You just tell us your requirements, and we’ll handle the rest. From raw material characteristic analysis to production line configuration optimization, from installation and commissioning to after-sales maintenance, a professional team will follow up throughout the entire process. Simply leave a message to begin your personalized RDF resource utilization journey.
1-1.2 tons/hour RDF pellet mill in Germany
This is a small-scale RDF pelletizing production line. The produced RDF pellets are used for local heating and in industrial boilers.
Because Germany has very strict environmental standards, we equipped this biomass production line with multiple cleaning devices to ensure a clean production environment and improve the overall quality of the product.
- Raw materials: Plastics, textile waste, a small amount of wood chips
- Particle diameter: 6-10mm
- Main equipment: MZLH420 wood chip pellet machine, permanent magnet drum, cylindrical primary cleaning screen, grading screen, crusher, dryer and cooler, automatic packaging scale
2-3 tons/hour RDF pellet machine in Poland
This customer wanted to make RDF pellets from waste tires. Tires are quite elastic, and directly pressing them into the RDF pelletizer would easily cause slippage.
Therefore, we added a conditioner to the pellet mill, using high-temperature steam to soften the tires, making the pellets easier to form.
- Applications: Tire pellets have a high calorific value, making them ideal as an alternative fuel for industrial boilers and cement plants.
- Raw Materials: Waste tires, broken plastics, waste paper
- Pellet Diameter: 8-10mm
- Main Equipment: MZLH678 RDF fuel pellet mill, crusher, dryer, cooler, baling system
3-4 tons/hour RDF Pelleting machine in India
The client operates a solid waste treatment company in India. It primarily utilizes large quantities of municipal waste to produce alternative fuels for supply to cement plants.
However, due to the diverse origins of the municipal waste, it needs to be sorted and usable components extracted before entering the production line.
- Raw materials: Municipal solid waste (raw material prices fluctuate significantly), plastics
- Main equipment: MZLH768 RDF pellet mill, crusher, dryer, cooler, screening system, baling scale
Other Equipment in the A RDF Pellet Mill Production Line
The RDF pellet mill is the core equipment in the production line. However, to improve overall production efficiency, the equipment in each stage must be matched with each other. For example, if the dryer’s speed cannot keep up with the pellet mill’s, the material will pile up, slowing down the entire production line’s operating efficiency. Therefore, when setting up your production line, we will fully consider the capacity configuration between different equipment, using the most scientific combination to maximize production line efficiency.
Corn stalk crusher
Cleaning equipment
Rotary drum dryer
Counterflow cooler
Conveying equipment
Gyratory Screener
Automatic Packing Scale
Pulse Dust Collector
Why Choose RICHI Machinery
Choosing RICHI Machinery means not just acquiring a single machine, but teaming up with a reliable partner with nearly 30 years of expertise in Biomass pellets processing. We look forward to joining hands with you to shape a new future for the industry.
Excellent after-sales service
After the RDF Pellet Mill arrives, we will carry out professional commissioning and acceptance. Our technicians will repeatedly commission the equipment in each production section to ensure the equipment operates up to standard. Additionally, if you are unfamiliar with our equipment, RICHI technicians will provide one-on-one on-site training until your team can operate the entire production line independently. For any questions, our technicians can provide online guidance.
Customized design
RICHI has a dedicated R&D and design team to provide you with customized services. We offer over 200 products to meet all types of chicken feed production needs. In addition, we provide full-process design services, including site planning and equipment layout. Whether you are new to the feed industry or already operating a mature production line, just share your requirements with us, and we will deliver a tailored solution based on your actual situation.
Our Honors
At RICHI Machinery, we believe that stable performance and real results matter more than slogans. Over the years, we have earned a number of international certifications and national patents, especially in equipment design and quality control. This means our feed and biomass pellet machines are not only well-designed, but also proven in real projects. We welcome the opportunity to work with you and support your business growth with reliable and efficient solutions.
High-quality equipment production
The production stage is the core link of the entire project implementation. We own two modern intelligent manufacturing bases and operate a strict quality control system. Every piece of equipment meets international first-class standards. The company has passed BV certification, ISO9001 International Quality Management System Certification, European CE Certification, and Swiss SGS Certification, among others.
consultation
cooperation
production
transportation
Frequently Asked Questions
Here are some frequently asked questions. You can also contact us at any time for answers.
Where can an RDF pellet mill be used?
RDF pellet making mills are used in the field of waste-to-energy processing. The RDF pellets they produce burn stably. Compared to coal, these pellets emit far fewer pollutants, perfectly aligning with global environmental trends. They are primarily used in:
- Cement plants
- Industrial boilers
- Power plants
- Waste treatment plants
- Energy projects
If you are interested in pelleting, please feel free to contact us to place an order. We ship directly from our factory, so you can get the best prices here.
Can the RDF pellet machine produce other non-fuel pellets?
Yes, it’s possible, but the process parameters and production configurations will differ depending on the type of granules.
For example, we produced paving rubber pellets for a customer in Poland. Their raw materials were waste tires and some rubber products. Based on the characteristics of their raw materials, we equipped the pellet mill with a conditioner. Steam conditioning increased the viscosity between the materials, resulting in compact and less brittle pellets.
What is the quality of the final generated RDF particles? What are their advantages?
RDF pellet mills produce pellets with a smooth surface and high hardness, making them ideal for long-distance transportation and long-term storage.
RDF pellets are a product that combines economic and environmental benefits. They burn longer than traditional energy sources while emitting very little pollution. This clean energy source is supported by environmental policies in many countries and has broad development prospects.
Raw material sources are abundant and inexpensive, significantly reducing overall fuel costs.
Does the equipment include installation? What about after-sales service?
All our equipment comes with a 12-month warranty and lifetime technical support. Furthermore, upon delivery, we will provide technical training and installation guidance to ensure the smooth operation of your production activities.
