April 14, 2025

What is a Dual Track Ring Die for Horizontal Pellet Mill?

A Dual Track Ring Die is a specialized ring die used in high-performance pellet mills. Unlike single-track dies, it features two concentric compression tracks that allow for simultaneous production of pellets in a double ring pattern. This results in higher throughput, uniform pellet formation, and longer service life.

✅ Key Benefits:

⚙️ Increased Throughput: Dual tracks enable higher pellet production (2–5 TPH).
🌾 Improved Biomass Compression: Achieves tighter compaction, enhancing pellet density.
🔥 Higher GCV: Better compression and lower voids lead to improved Gross Calorific Value (up to 4,000–4,200 kcal/kg for biomass).
🎯 Uniform Pellet Quality: Reduces fines and dust; results in consistent size and shape.
⏳ Extended Die Life: Balanced wear on both tracks increases die longevity.
💨 Better Heat Distribution: Maintains uniform temperature, reducing overheating or material burn.
💪 Higher Density Pellets: Densities increase from 550–650 kg/m³ (standard) to 700–750+ kg/m³ with dual track dies.
🧱 Improved Binding: Lignin activation improves due to enhanced heat & pressure dynamics.
🧰 Reduced Machine Load: Efficient discharge of material lowers strain on rollers and gearbox.
♻️ Suitable for All Biomass: Works well with wood chips, rice husk, wheat straw, napier grass, bamboo, coconut waste, etc.

🛠️ Technical Specifications:

Feature	Details
Die Type	Dual Track Ring Die (Concentric)
Material	Alloy Steel (typically 4Cr13 or X46Cr13)
Hardness	50–55 HRC (Heat Treated, Vacuum Hardened)
Application	Biomass, Wood, Feed, Agro Waste
Working Capacity	2 – 5 Tons per Hour
Inner Diameter	500mm to 850mm (varies by mill size)
Track Width	Typically 60–120 mm (each track)
Compression Ratio	Customized (6:1 to 12:1 depending on material)
Holes per Track	4000–8000+ (depending on hole size)

🌟 Impact on Biomass Pellet Quality:

Quality Parameter	Dual Track Die
Pellet Density	700–750+ kg/m³
GCV (Calorific Value)	Up to 4,200 kcal/kg(depends on materials)
Pellet Durability Index (PDI)	90–94%
Ash Content	Less fines produced
Pellet Uniformity	High