| Price | 2000-80000 USD |
| Delivery Time | 10-15 days |
| Available | In Stock |
| Package | In Free Fumigation Wood Box |
| Guarantee | 1 Year |
| Shipping | By Sea or By Air |
| Payment Method | Wire Transfer or Western Union |
| Brand | Victor |
Ring Die Pellet Mill Overview
| Production Output | 0.5-15 t/h |
| Power | Electric motor |
| Voltage | 110-415V |
| Raw Materials | Cereal, corn, wheat, barley flour, soybean, oil seed meal/cake, edible leaf, fish meal, bone powder, etc |
| Type | ring die type |
| Final product size | 2-10 mm |
| Application | feed production, feed industry |
| Used For | animal feed, poultry feed, sinking fish feed |
ring die pellet machine specifications
| Model | Power(Kw) | Output(kg/h) | Feeding Power(kw) | Conditioner Power(kw) | Ring Die Diameter(mm) | Pellet Size(mm) |
| HMK-250 | 22 | 500-1000 | 0.55 | 2.2 | 250 | 1.5-8 |
| HMK-300 | 30 | 1000-2000 | 0.75 | 2.2 | 300 | 1.5-8 |
| HMK-320 | 37 | 2000-3000 | 0.75 | 2.2 | 320 | 1.5-8 |
| HMK-350 | 55 | 3000-4000 | 1.5 | 3 | 350 | 1.5-8 |
| HMK-400 | 75 | 4000-5000 | 1.5 | 5.5 | 400 | 1.5-8 |
| HMK-420 | 110 | 5000-8000 | 1.5/2.2 | 5.5 | 420 | 1.5-8 |
working video of ring die pellet mill
Introduction
When it comes to making large quantities of high-quality pellets consistently, not all machines are created equal. For serious, commercial-scale production, one machine stands out as the industry workhorse: the ring die pellet mill. It is the go-to choice for businesses that need high efficiency, durability, and a top-quality final product, whether that product is fuel pellets or animal feed.
This guide will dive deep into what a ring die pellet mill is. We will look at how its unique design works. We will also cover why you might choose one over other types, and what you should look for when considering a purchase.
What is a Ring Die Pellet Mill?
A ring die pellet mill is a heavy-duty machine. It uses a rotating, ring-shaped die and internal rollers to compress raw materials into dense, uniform pellets. It is designed specifically for high-capacity and continuous operation. This makes it the standard for commercial pellet production plants around the world.
How It Works: A Look Inside the Machine
The design of a ring die mill is smart and efficient. Let’s look at the key parts.
The Rotating Ring Die
Imagine a thick, heavy steel tire or ring standing upright. This “tire” is the ring die. It has hundreds of small holes drilled through it from the inside to the outside. When the machine is on, this entire ring spins at a high speed.
The Internal Rollers
Inside this spinning ring, there are two or more heavy rollers. They do not travel around the ring like a car on a road. Instead, they spin in their place, positioned very close to the inner wall of the die.
The Compressing Action
Raw material is fed into the center of the spinning ring. The spinning motion, called centrifugal force, throws the material outwards. This pins it against the inner wall of the die, creating a thick layer. The stationary rollers then press against this layer of material with immense force. This squeezes the material through the small holes in the die. This intense pressure and the friction it creates is what forms the hard, dense pellet.
Cutting the Pellets
As the long strands of compressed material push out of the holes on the outside of the die, a set of adjustable knives cuts the pellets. This ensures they are all cut to a uniform, consistent length.
The Key Advantages: Why Choose a Ring Die Pellet Mill?
Businesses choose ring die mills for several important reasons.
High Production Capacity: These mills are built for high output. They can produce much larger quantities of pellets per hour (often measured in tons per hour) compared to other types of mills.
Produces High-Quality, Dense Pellets: The efficient design and the high pressure used create very consistent and durable pellets. The finished pellets usually have a smooth, polished look, which is often required for commercial markets.
Durability and Longer Service Life for Continuous Use: Ring die mills are built for heavy-duty, often 24/7, operation. The wear on the die and rollers can be more evenly distributed. This often leads to a longer lifespan for these key parts compared to other designs under heavy use.
Better Energy Efficiency at Scale: While these mills use powerful motors, their efficiency is often better in large-scale production. This is often measured in tons of pellets produced per kilowatt-hour of energy. For high volumes, they can be more energy-efficient than using multiple smaller machines.
What Raw Materials Can It Handle?
A robust ring die pellet mill can turn many different raw materials into pellets. The key is that the material must be properly prepared first (ground to the right size and with the correct moisture content). You can use:
- Wood materials: like sawdust, wood shavings, and ground wood chips.
- Biomass: like straw, rice husks, and other agricultural residues.
- Animal Feed Ingredients: like corn, soybeans, wheat, and other grains for making feed for livestock, poultry, and fish.
- Other materials: like fertilizer components.
Ring Die vs. Flat Die: A Quick Comparison for Buyers
This is a common question for anyone looking to buy a pellet mill.
Production Scale:
Ring Die: The choice for large, commercial, or industrial-scale production.
Flat Die: Best suited for smaller-scale operations, pilot projects, or on-farm use.
Initial Cost:
Ring Die: A significantly higher initial investment.
Flat Die: Much more affordable to start with.
Material Handling:
Ring Die: Excels with materials that are consistently prepared and relatively easy to pellet.
Flat Die: Can sometimes be more forgiving with raw materials that have slight inconsistencies in moisture or size.
Durability under Load:
Ring Die: Designed and built for long, demanding, continuous use.
Flat Die: While durable for their intended use, they are not typically designed for 24/7 industrial operation.
Choosing the Right Ring Die Pellet Mill: A Buyer’s Checklist
If you decide a ring die mill is right for you, here are some key things to check:
Verify the Capacity (tons/hr) for YOUR Specific Raw Material
A mill’s stated capacity for soft wood sawdust will be different from its capacity for hardwood or a fibrous animal feed. Ask the supplier for performance data on your specific material.
Check the Die and Roller Materials & Design
High-quality, durable alloy steel is a must for these high-wear parts. Ask about the “compression ratio” of the die, as different materials need different ratios to make the best pellets.
Examine the Drivetrain and Motor
Look for reliable, well-known motor brands. Also, check for a robust gearbox or belt drive system. This is the powerhouse of the machine, and it needs to be strong.
Ask About a Conditioner
Most ring die mills perform best when the raw material is first passed through a steam conditioner. This step prepares the material for pelleting. You should discuss this requirement with your supplier.
Supplier Reputation and Technical Support
These are complex industrial machines. Make sure the supplier has a strong reputation. They should be able to provide good technical support. They also need to have a reliable supply of spare parts like dies and rollers.
Insider Tips for Success
Here is some practical advice that comes from experience:
- For Grinding: “Here’s a tip that will save your machine from a lot of damage: Always run your raw ingredients over a simple screen or magnet before they go into the grinder. One small stone or piece of metal can instantly ruin an expensive screen or damage the internal hammers.”
- For Crumbling: “The secret to good crumbles is starting with high-quality, hard pellets. If your pellets are soft, poorly made, or have too much moisture, they will just turn into dust when you try to crumble them. You can’t make good crumbles from bad pellets.”
- Sift After You Crumble: “For best results, especially when you are feeding sensitive fry, it’s a good practice to sift the crumbles through a screen after they come out of the crumbler. This removes any remaining fine dust, which can cloud your water and harm the gills of small fish.”
Frequently Asked Questions
1. What is the “compression ratio” of a ring die?
This is a key technical term. It’s the ratio of the effective length of the die hole compared to its diameter. A higher ratio means more compression and is generally used for lighter, fluffier materials that are harder to press together. A lower ratio is used for denser materials. Getting the right compression ratio is critical for making good quality pellets from a specific raw material.
2. Can a ring die mill handle wet raw materials?
No. Just like all other pellet mills, a ring die mill requires the raw material to have a specific and low moisture content before it enters the machine. This is typically around 10-15%. Any material that is too wet must be dried first.
3. Why are ring die pellet mills so much more expensive than flat die mills?
They are larger and more complex building with heavier, more durable components that are designed to handle high-volume, continuous production. They also have a more sophisticated drivetrain (either gear-driven or belt-driven) and use much more powerful motors to handle this industrial-scale output.
4. Is maintenance on a ring die mill difficult?
It is more involved than on a small flat die mill because it is an industrial machine. It requires a regular, scheduled maintenance plan. This includes lubrication, checking the wear on the die and rollers, and making sure the rollers are properly adjusted. However, these machines are designed to be serviceable in an industrial setting.
5. Do I need a ring die mill for my small farm or workshop?
Almost certainly not. For small farm, workshop, or homestead use, a flat die pellet mill is much more suitable. Its lower cost, smaller size, and simpler power requirements are a much better match for small-scale production needs.