Disc granulators are common pellet-making machines used in fertilizer, feed, and similar industries. Material moisture content is a key factor affecting the granulation process. Too high or too low moisture leads to lower pelletization rates, weaker granules, or increased energy use.
1.Moisture Too Low
Hard to Form Pellets: Not enough moisture reduces material stickiness. It struggles to form uniform pellets while rolling in the disc granulator, lowering the pelletization rate.
More Dust: Dry material creates dust easily. This pollutes the environment and wastes raw materials.
Weak Granules: Pellets with too little moisture are loose and crumbly, affecting storage and transport.
2.Moisture Too High
Sticking and Clumping: High moisture makes material stick to the granulator pan. This messes up the rolling action needed to form pellets and can cause large clumps, reducing efficiency.
Higher Drying Costs: Wet pellets need longer, hotter drying, increasing energy use and production costs.
Deformed or Sticky Pellets: Excess moisture causes pellets to lose shape easily. They can also clump together during storage, making them harder to use.
3.Ideal Moisture Range
The best moisture level depends on the material:
Organic Fertilizer Granulation: 20%-30%
Compound Fertilizer Granulation: 5%-10%
Feed Pellet Granulation: 12%-18%
In short, controlling moisture properly boosts pelletization rates, cuts energy use, and helps the disc granulator last longer. Companies should manage moisture based on their specific materials for stable, efficient production.