The material entering vertical roller mill is unstable and the thickness of the layer is excessively fluctuating. There is no reasonable material layer and material shape, such as manual feeding and clogging of the feeding scale, causing large fluctuations. The measure is uniform feeding to ensure unobstructed feeding.

When the system air volume is too large, the material stays in vertical roller mill for a short time, the discharge amount is large, and the material is small and vibrates; when the air volume is too small, the material stays in vertical roller mill for too long, and the repeated grinding makes the material too fine, the differential pressure is high and the vibration.

In addition, when the moisture content of the grinding material increases or decreases, the inlet temperature suddenly rises or falls, and the tailgate damper suddenly becomes larger or smaller, which will directly affect the ventilation of the vertical mill.

At this time, if the adjustment is not timely, it will be inevitable to cause vibration. Therefore, when the moisture content of the grinding material increases, the feeding amount is reduced, the water spray is reduced, the wind temperature is increased, and the vertical grinding ventilation is increased to solve the problem.