1. Material Characteristics
Excessive Moisture: Excessive moisture content in the mill feed (usually >15%) increases viscosity, causing adhesion to the liner, grate gaps in the baffle plates, and the inlet and outlet ports, forming a blockage layer.
Excessive Impurities: Iron chips or debris become lodged in the grate gaps in the baffle plates, or limestone containing dirt and dust causes blockage at the wet mill inlet.
Abnormal Particle Size: Feeding particles that are too large (>30mm) or too fine can easily lead to grinding imbalance and increase the risk of blockage.
2. Improper Equipment Operating Parameters
Poor Ventilation: Inadequate ventilation in the mill (e.g., insufficient system ventilation or a clogged dust collector) can trap moisture and fine powder, exacerbating material adhesion.
Improper Feeding: Overfeeding or excessively fast feed rates can overload the mill and cause saturation blockage. Incorrect steel ball grading: An unbalanced grinding ball ratio (e.g., a filling ratio less than 25%) reduces crushing efficiency and causes material accumulation.
3. Mechanical Structure Failure
Blocked baffles: Grate holes become clogged with paste or debris, hindering material flow.
Lubrication Failure: Bearing wear or insufficient lubrication (e.g., oil deterioration) can cause localized high temperatures, indirectly exacerbating material adhesion.
Cooling System Abnormality: Insufficient water cooling flow or dust accumulation in the air ducts leads to poor heat dissipation, affecting material flowability.
4. Negligible Operation and Maintenance
Untimely Clearing: Failure to clean the mill's internal material can lead to a thick clogged layer.
Installation Deviation: Coupling misalignment or loose bearings can cause vibration, accelerating component wear and indirectly causing blockage.
