Impact of material moisture content on pellet quality in ring die granulators

In the production of pellets like feed and fertilizer, the moisture content of the raw material is one of the most critical factors affecting both the efficiency of ring die granulators and the quality of the finished product. Properly controlling material moisture not only improves pelleting efficiency but also significantly enhances the physical quality and storage stability of the pellets.

1.Impact of Too Low Moisture

When moisture is below 12%, material flowability is poor.It becomes difficult to fully fill the die holes, making pellet formation hard and reducing output.Wear on the ring die and rollers increases.Pellets have a rough surface, produce excessive powder, have low hardness, and break easily.

2.Optimal Moisture Range

Most materials achieve the best pelleting results within a 13-18% moisture range.In this range, moisture acts as a natural lubricant and binder.This effectively reduces energy consumption (by about 15-25%) and increases output (by 20-30%).It also produces high-quality pellets with a smooth surface and dense structure.

3.Impact of Too High Moisture

When moisture exceeds 20%, the material tends to slip inside the ring die granulator, causing blockages.Pellets become too soft, shrink and deform badly after drying, and are prone to mold during storage.High-moisture material also significantly increases energy costs for the subsequent drying process.

By scientifically controlling material moisture content, companies can significantly improve the efficiency of ring die granulators, reduce production costs, and obtain higher-quality pellet products, strengthening their market competitiveness.