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Vertical Mills Supply

Vertical Mills Supply

Temperature And Vertical Mills Operation

Influence Of Inlet Temperature On The Operation Of Vertical Mills

The high inlet temperature of the Vertical Mills will cause the internal materials of the Vertical Mills to dry too fast, the suspended materials will increase, the differential pressure will increase, and the bed will become thin and unstable. At this time, the amount of water spray should be appropriately increased to stabilize the layer or increase the amount of feed appropriately. If it does not work, adjust the water spray volume of the humidification tower to reduce the outlet temperature; the low inlet temperature of the Vertical Mills will increase the driving power of the main motor, the thickness of the material layer will become thicker, and the output will become lower. At this time, the amount of water spray should be reduced, the inlet temperature should be increased, and the feed amount should be appropriately reduced.

Effect Of Outlet Temperature On Vertical Mills Operation

The Vertical Mills outlet temperature is a basis for us to judge the grinding condition of the Vertical Mills. We can judge whether the operation adjustment method we take is reasonable according to the outlet temperature of the Vertical Mills and other changes.

  • 1. Grinding condition when the outlet temperature of the Vertical Mills is too high: the material layer is thin, the material layer is unstable, the power of the Vertical Mills is fluctuating greatly, the vibration is large; the amount of returning material is increased; the fineness of the product becomes thick.
  • 2. Grinding condition when the outlet temperature of the Vertical Mills is too low: the material layer is thick; the Vertical Mills has high power; the vibration is large, and the output of the Vertical Mills is decreased.
  • 3. The relationship between the change of the outlet temperature of the Vertical Mills and the circulating load of the Vertical Mills: Under the condition that the system air volume and the speed of the powder separator are constant, the change of the cyclic load reflects the change of the material characteristics and the Vertical Mills. The level of grinding efficiency. A. The cyclic load increases and the outlet temperature drops. When the cyclic load rate becomes larger, the average fineness of the material inside the Vertical Mills becomes thinner, so that the heat transfer area increases, and the increase of the internal storage amount of the Vertical Mills also increases the heat transfer area, thereby causing the airflow and the material to be The heat transfer rate is increased, resulting in a drop in the temperature of the Vertical Mills outlet. B. The cyclic load is reduced and the outlet temperature is increased. At this time, the Vertical Mills has a higher grinding efficiency. C. The factors affecting the cyclic load rate of the Vertical Mills: the larger the air volume, the smaller the cyclic load rate; the faster the speed of the powder separator, the higher the cyclic load rate; the material honing and the thickness of the material layer also affect the cyclic load rate. In normal production, a suitable material layer is formed by setting a reasonable inlet air temperature and water spray volume. This is beneficial to improve the grinding efficiency and reduce the cycle load rate.
  • 4. The relationship between the best grinding condition of the Vertical Mills and the grinding temperature: During the operation of the Vertical Mills, sometimes the grinding mill temperature is controlled at 92 °C, the Vertical Mills has the best grinding condition, and Sometimes it is necessary to control the grinding temperature to 98 °C. Because of the difference in moisture, particle size, and other physical properties of the raw materials and the ratio between the raw materials, the water required to form a stable and rational material layer is different. Therefore, in the operation, the grinding temperature should not be taken as the control target, but the grinding condition of the Vertical Mills should be taken as the control target, and the change trend of the grinding temperature should be focused on, and the temperature value should not be excessively valued.
  • 5. Reasonably adjust other parameters according to the change of the grinding temperature: the initial adjustment of the grinding. In the initial stage of grinding, with the decrease of the fineness of the material inside the Vertical Mills, the outlet temperature of the Vertical Mills is gradually reduced. When the outlet temperature stops falling, it indicates that the amount of circulating materials inside and outside the Vertical Mills is reduced, which can be gradually Increase the amount of feed. Adjustment in normal grinding. Since the reaction temperature is very timely in response to the internal material volume of the Vertical Mills, after the Vertical Mills is stably ground for a period of time, if the outlet temperature is continuously reduced, we can preliminarily conclude that the Vertical Mills has been stored internally. When the current of the powder separator decreases, the bucket pump and the air pump current decrease, the power of the Vertical Mills rises, and the material layer becomes thicker. At this time, it can be confirmed that the internal material of the Vertical Mills is too much, and the feeding amount can be reduced. When the export spy begins to rise and the Vertical Mills power is reduced, the feed rate can be gradually increased.

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