High Dust Content in Pellets: Comprehensive Troubleshooting for Pellet Mills （3）
Unstable feeding is a common problem. Fluctuations in feeder speed (due to issues like inverter malfunctions) lead to uneven material filling in the die, resulting in insufficient pressure in some areas. To resolve this, calibrate the feeder speed and use a level sensor to maintain a steady material level in the pellet mill's bin.
Vibration or loosening of the pellet mill can also affect performance. Loose die bolts or excessive clearance in the roller shaft cause misalignment between the die and roller during operation, leading to uneven pelleting pressure. Regularly inspect and tighten die bolts, and check the roller shaft for excessive movement—adjust or repair bearings as needed.
Inadequate cooling processes contribute to pellet breakage and powder formation. Insufficient cooling prevents internal moisture from escaping, causing pellets to crack after cooling (especially for high-moisture materials). Extend the cooling time or upgrade to a larger cooler, and ensure the cooling fan operates effectively by cleaning debris from air inlets.
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