Vertical Ring Die Pellet Machine

 

The vertical ring die pellet machine (also called a vertical ring die pellet mill) is a high-capacity wood pellet press designed for continuous industrial production. It compresses crushed biomass - sawdust, wood shavings, bamboo, straw, rice husk and similar materials - into dense, uniform fuel pellets that burn cleanly and store easily. Compared with flat die mills, vertical ring die mills deliver higher output per kW, denser pellets and longer die life, making them the preferred choice for serious biomass fuel producers.

 

 

 

• High output per kilowatt: the ring die rotates around a fixed die ring and uses centrifugal force to discharge finished pellets, so more material is pressed in less time than a flat die mill of the same power.
• Vertical feeding: gravity-fed raw material enters from above and is distributed evenly, eliminating manual feeding and keeping production continuous.
• Dense, uniform pellets: typical pellet density reaches [1.0–1.3 g/cm³], with smooth surfaces and consistent diameters.
• Wide pellet size range: by changing the ring die, the same machine can produce pellets from 4 mm to 12 mm in diameter - typically 6 mm or 8 mm for residential fuel.
• Heavy-duty construction: the main motor, gearbox and ring die are designed for 24-hour continuous operation.
• Stable, low-vibration running: the symmetrical vertical structure keeps vibration low, extending bearing and die life.
• Easy integration: pairs naturally with screw conveyors, bucket elevators, dryers, coolers and screening machines for a complete production line.

 

 

The MKLH series ring die wood pellet making machine is engineered to turn loose biomass into high-density fuel pellets at industrial scale. Raw material is fed into the top of the machine, distributed by a centrifugal feeder, and pressed between the rotating ring die and two stationary press rollers. As the die rotates, the pellets are pushed through the die holes and discharged by centrifugal action into a conveyor below.

 

The finished pellets leave the press at temperatures of roughly 80–90 °C. Because the structure is still loose and fragile at this stage, they must pass through a counter-flow cooler to drop to room temperature before they can be bagged or moved into silos.

 

Ring Die Pellet Mill for Sawdust Pellet Production

 

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1. Pre-processing: raw biomass is crushed to 3–5 mm particles and dried to the recommended moisture level.
2. Vertical feeding: a screw conveyor feeds the material into the top of the pellet mill; gravity and the centrifugal feeder distribute it evenly inside the chamber.
3. Pressing: two press rollers force the material through the holes of the rotating ring die; friction and pressure heat the material and soften the lignin.
4. Cutting: an adjustable cutter slices the extruded pellets to the chosen length.
5. Cooling: counter-flow cooling brings the pellets to room temperature and hardens them.
6. Screening: fines are separated and returned to the press; finished pellets are bagged or moved to storage.

 

 

 

Four standard models cover outputs from 1 to 4 tonnes per hour, with all models producing pellets in the 4–12 mm diameter range.

Model	Capacity	Main Power	Pellet Diameter	Machine Size (L × W × H)	Weight
MKLH560	1–1.5 t/h	90 kW	4–12 mm	2620 × 1640 × 1770 mm	5.2 t
MKLH560A	1.5–2 t/h	132 kW	4–12 mm	2680 × 1560 × 1770 mm	5.6 t
MKLH700	2–2.5 t/h	160 kW	4–12 mm	2560 × 1380 × 2020 mm	7.2 t
MKLH860A	3–4 t/h	250 kW	4–12 mm	3150 × 1550 × 2240 mm	9.5 t

 

 

 

• Wood sawdust, wood shavings and wood chips (after crushing)
• Bamboo fibers and chips
• Crop straw, rice husk, peanut shells, palm kernel shells (after appropriate crushing)
• EFB (empty fruit bunch) and other palm residues
• Paper, cardboard and other cellulose-based materials (in dedicated configurations)

 

Ring die Wood Chip Pellet maker Machines are sensitive to moisture. If the moisture is too high, pellets will crack or fail to form; if it is too low, the die ring wears faster and output drops. The recommended raw material moisture is [12–18%]. For very wet material, a drying step (drum dryer, pipe dryer, or airflow dryer) should be added before the pellet press.

 

 

 

• Industrial biomass fuel production (sawdust pellets, wood pellets for export)
• Heating pellets for households, schools and commercial buildings
• Animal bedding pellets
• Feed pellets (after appropriate configuration)
• Raw material for carbonization furnaces and gasification plants

 

 

 

• MKLH560 (90 kW, 1–1.5 t/h) - entry-level for small pellet plants, farms and workshops. Daily output around [20–30] tonnes.
• MKLH560A (132 kW, 1.5–2 t/h) - a step up for growing operations that need a noticeable capacity boost without a much larger footprint.
• MKLH700 (160 kW, 2–2.5 t/h) - the mainstream industrial model, suitable for medium production lines selling pellets to local heating markets or export distributors.
• MKLH860A (250 kW, 3–4 t/h) - for high-volume industrial production serving export, district heating or large biomass power plants.

 

 

Q1: What pellet diameters can the machine produce?

By changing the ring die, the MKLH series produces pellets from 4 mm to 12 mm in diameter. The most common sizes are 6 mm and 8 mm for residential and commercial heating fuel.

 

Q2: What is the difference between a ring die pellet mill and a flat die pellet mill?

A ring die pellet mill uses a rotating ring die with two stationary press rollers; its output and pellet density per kW are higher than a flat die mill. Flat die mills are cheaper and suited to small-scale production (below 1 t/h); ring die mills are the standard for industrial production above 1 t/h.

 

Q3: What raw materials can it process?

Sawdust, wood shavings, wood chips (after crushing), bamboo, rice husk, straw, peanut shells, palm kernel shells, EFB and similar biomass. Material should be crushed to 3–5 mm particles and dried to the recommended moisture level before pressing.

 

Q4: What moisture content should the raw material have?

The recommended moisture is [12–18%]. Material that is too wet produces cracked or weak pellets and wastes energy; material that is too dry accelerates die ring wear. If your raw material is wetter than this, we will include a dryer in the line design.

 

Q5: Do you offer a complete pellet production line?

Yes. We supply the full line: crusher, dryer, screw conveyor, bucket elevator, ring die pellet mill, counter-flow cooler, vibrating screener, and bagging or silo system. All equipment is matched to the pellet mill you select.

 

Q6: How long does the ring die last?

With correct raw material, moisture and regular maintenance, the ring die typically lasts [800–1500] working hours. We stock replacement dies for all four MKLH models.

 

Q7: What is your warranty and after-sales service?

We provide a [12–24] month warranty, lifetime spare parts supply, online technical support and installation guidance. On-site commissioning and engineer dispatch are available for large orders.

 

Q8: Can I visit the factory or test the machine before ordering?

Absolutely. We welcome customers to visit our workshop, inspect the machines and run a trial production with your own raw materials. Contact us to arrange a visit.

 

 

Tianjin Mikim Technique Co., Ltd. specializes in wood pellet mills, pellet production lines and briquette rod making machines. Our quality management system is certified to [ISO 9001:2015], and export models comply with [CE] standards. The company serves customers in [_50_] countries worldwide.

Certification documents and customer references are available on request. For a complete list of our certificates, please contact our sales team.

 

 

 

We regularly welcome customers from Russia, Southeast Asia, the Middle East and Africa to our factory for machine inspection and trial runs. A typical visit includes: a guided tour of the production line, a live pressing test using the customer's own material, and a discussion of layout, installation and after-sales support. Photos of recent visits are shown above; more case studies and customer references are available on request.

 

 

 

Company: Tianjin Mikim Technique Co., Ltd.
Factory address: [请核实并填写准确工厂地址]
Registered address: 25th Floor, Huafu Commercial Center, Henan, China
Tel / WhatsApp: +86 199 1372 6062
Email: wood@mikimz.com

Send us your raw material details, moisture content and target daily output - we will reply within 24 hours with a quotation and technical proposal.

 

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