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Grinding Mill In China

Analysis of the Causes of Vibration of Vertical Grinding Mill

In actual production operations, many vibrations are caused by improper operation, such as vibrations caused by unstable control of the material layer. Since the layer is too thin, there is little material that can be ground, and the grinding yield is reduced. At the same time, too thin a material layer will cause a rigid contact between the grinding disc and the grinding roller, which will cause great vibration, resulting in serious wear and increased energy consumption of the Vertical Grinding Mill equipment. If the material layer is too thick, the grinding capacity of the Vertical Grinding Mill will be reduced, and the internal circulation load will increase, causing the grinding roller to jump up and down, causing serious damage to the equipment and affecting the safe use of the equipment. Therefore, the control of the material layer is very important, and the reasons for the change of the material layer are as follows.

The difference between the grinding pressure and the grinding pressure

The difference between the grinding pressure and the grinding pressure is the pressure difference, which is one of the main factors affecting the vibration of the Vertical Grinding Mill. The change of pressure difference directly reflects the change of internal circulating load rate of Vertical Grinding Mill, which is related to many factors such as material size, material characteristics, grinding pressure, internal ventilation, material moisture, and Vertical Grinding Mill feeding. For example, if the particle size of the material is too small, the grinding pressure is high, the moisture is low, the feeding amount is large, and the ventilation is insufficient, the differential pressure will increase and the material layer will become thicker; on the contrary, the differential pressure will decrease, the material layer will become thinner, and the movement will be caused. The crusher vibrates, and if it is not adjusted in time, it will cause the Vertical Grinding Mill to stop.

Hot air temperature

The temperature of the hot air will have a great impact on the vibration of the Vertical Grinding Mill, because the ventilation capacity of the fixed Vertical Grinding Mill should ensure the drying efficiency of the material. Therefore, the temperature of the hot air must be controlled. The moisture content of the milled and ground materials. However, poor wind temperature control will affect the grinding efficiency of the Vertical Grinding Mill to a certain extent. If the wind temperature is too high, it can achieve a good drying effect and grinding effect, but it will cause the material layer to be too thin. If the air temperature is too low, the drying material will be difficult, the grinding is difficult to carry out, and the material is easily pressed into a cake shape, causing the Vertical Grinding Mill to vibrate.

Under normal circumstances, the air temperature is preferably 200 ° C ~ 250 ° C at the entrance, according to the water content of the material and the water spray in the mill, the temperature should be controlled at 80 ° C ~ 120 ° C is appropriate. Under this parameter, the Vertical Grinding Mill runs smoothly and efficiently, and does not generate a lot of vibration.

Grinding pressure

The grinding pressure is the sum of the pressure mainly applied by the weight of the center frame, the hydraulic system and the grinding roller. The grinding pressure is directly related to the compression ratio of the material and the thickness of the material layer. The grinding pressure increases and the thickness becomes thin. Conversely, the pressure becomes smaller and the thickness increases.


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