The composition and physical properties of the ore have a great influence on the efficiency of the grinding technology. For example, when the useful mineral in the ore is coarse in grain size and the structure is loose and brittle, it is easier to grind. When the useful mineral has a finer grain size, a dense structure, and a higher hardness, it is more difficult to grind. In general, the coarse-grained grade is easier in rough grinding, the faster it produces the acceptable particle size, and the finer the grinding. Because as the particle size decreases, the fragile surface of the material also decreases, that is, becomes more and more sturdy, so the rate of producing the qualified particle size is slower. Therefore, the coarse grinding technology is more efficient than fine grinding. Equipment factors have a certain impact on the efficiency of ultrafine mill grinding technology. For example, the overflow Calcite mill Introduction has a slower discharge rate, and the large density of the ore is not easily discharged, and it is easy to cause excessive pulverization. In addition, the classifier that forms a closed circuit with the centrifugal ultrafine mill grinder is easy to pulverize when the classification efficiency is low, thus reducing the efficiency of the grinding technology.  

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