A vertical mill, also known as a vertical grinding mill, is a large - scale, high - output, energy - saving grinding product. Its working principle mainly involves the coordinated operation of components such as the grinding disc, grinding rollers, and air flow1. The specific process is as follows1:
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Feeding
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The motor drives the grinding disc to rotate through the reducer. Meanwhile, materials enter the center of the grinding disc through the feeding port by the air lock feeder. At the same time, hot air enters the mill from the air inlet.
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Grinding
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As the grinding disc rotates, the materials move evenly from the center to the edge under the action of centrifugal force. When passing through the annular groove on the grinding disc, they are crushed by the grinding rollers. Large pieces of materials are directly crushed, and fine particles form a material bed under extrusion for inter - particle crushing.
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Separation
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The crushed materials continue to move to the edge of the grinding disc until they are carried away by the strong air flow at the air ring. Large particles directly fall back onto the grinding disc for regrinding. The materials in the air flow pass through the upper separator, and under the action of the rotating rotor, the coarse powder falls back onto the grinding disc from the cone hopper for regrinding, while the qualified fine powder exits the mill with the air flow.
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Collecting
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The qualified fine powder exiting the mill with the air flow is collected by the dust collection device, which is the final product.
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Drying
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Materials containing moisture are dried during the contact with the hot air. By adjusting the temperature of the hot air, the required moisture content of the product can be achieved, meeting the requirements of materials with different humidity levels
