The rotation speed of the ball mill has a great influence on the grinding of the material, because the rotation speed determines the lifting force of the grinding machine and the moving form of the medium. The rotation speed of the ball mill has a great influence on the grinding of the material, because the rotation speed determines the lifting force of the grinding machine and the moving form of the medium. Under certain conditions, depending on the mill speed, the grinding body may exhibit four different working conditions in the mill, namely pulsation, sag, drop, and centrifugal motion. Among the several sports forms, only the throwing motion and the sloping motion have the effect of effectively pulverizing the material.
When the rotation speed is very low, the grinding machine can not bring the grinding medium to a certain height, the grinding medium is hardly brought up, and the sliding movement in the grinding machine can only be carried out by the medium sliding weak grinding grinding; if the grinding machine speed If it is too large, the inertial centrifugal force of the grinding medium will cause the grinding medium to adhere to the inner wall of the mill to perform circular motion together with the mill, and the purpose of effectively impacting the material by the medium is not achieved. In order to efficiently use the grinding and impacting work of the medium during the movement of the material, the speed of the mill must be selected according to the actual grinding conditions.
The working speed of the ball mill refers to the actual speed of the ball mill in good working condition. The starting point of the design of the working speed is to raise the grinding medium in the ball mill to a certain height (as high as possible), and then throw it down to have the maximum impact force, in order to make as much grinding medium as possible in the falling working state, in general In this case, the ball mill operating speed is lower than the theoretical critical speed. Since the application of ball mills, many experts and scholars have carried out a lot of research on the rotational speed of ball mills, and many theoretical calculation formulas have been obtained.
Theoretically, the suitable rotational speed of the ball mill is 76% to 88%. At present, the ideal rotational speed is 76-90 in industrial production practice. The rotational speed selected in this paper is 80, and the ball mill is 600mm×500mm. Through numerical simulation test, the critical speed can be measured as 10r/s. The simulated rotational speed we selected is 8r/s
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Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
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