The main technical parameters of ultrafine mill include rotate medium diameter,capacity, fineness, feeding grain size, moisture of feeding material, number of roller and classifier and its power. Ultrafine mill parameters can exert great influence on the fineness of the final products. In order to get 70% of the final products in less than 2μm, the selection of the speed of separator, as well as the straining force and the thickness of the raw material counts.
Parameter No.1: impact of classifier’s speed on the fineness
The classification of coarse and fine powder can be achieved by changing the speed of the classifier. In light of the ultrafine mill working principle, if the classifier is under constant rotating speed, the stronger of the wind speed in the inlet gets, the more fineness of the final products get. The improvements of the classifier can bring stronger centrifugal force,which is conducive to produce more fine material.The above information indicates that the adjustment to the classifier’s rotating speed is the key to the grain size of the final product. In other words,to increase the fine powder output capacity, it is necessary to improve the screening rate of the ultrafine mill by adjusting its internal structure
Parameters No.2: influence of straining force on the raw material property
Some materials like hard rock, brittle and soft stones,as well as high viscous materials are supposed to be crushed before they are grinded. The straining force of ultrafine mill comes from its hydraulics system, which marks the improvement of the ultrafine grinding automation level. The straining force should match with the thickness of the raw materials. For example,it is a kind of waste to process a thin material with a strong force which can also bring damage to the equipment. On the contrary, much stronger force is needed to process those raw material in a high hardness. In short, straining force can directly effect the grain size of the final product.
Parameters No.3: adjustment of certain ultrafine mills in accordance with the raw material thickness
The working principle of this ultrafine mill is to grind the raw material according to its thickness.Hence,the grinding effects is up to the thickness of the raw material.Because the straining force is limited, too much thick material on the disc can produce a lot of coarse aggregate material. Too much thin material under the high grinding pressure will cause the deformation of the final products. Once select a type of ultrafine mill, it is essential to adjust raw material thickness in light of the capacity, fineness and efficiency.
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