Date：2017-12-29 09:29 Source：Clirik

How to determine the speed of the **ball mill** to improve production efficiency?

We know that the **ball mill** works by relying on friction and impact force from grinding body in the cylinder to crush the material. When the speed of the ball mill cylinder reaches a certain value, the centrifugal force generated by the abrasive body is equal to its own gravity, which results in the abrasive body being lifted to the degree of disengagement angle of 0 degree, that is, the abrasive body will closely adhere to the cylinder, rotates together with The body without landing, this time the speed becomes a critical speed.

When the rotation of the mill barrel reaches the critical speed, if the grinding body close to the wall of the cylinder, can not play the role of crushing, at this time, its crushing function of the material is zero. When the rotating speed of the cylinder slows down, the grinding body is in a state of falling-off and the crushing effect is very weak, that is, the crushing ability of the material is very small. Therefore, the cylinder speed, by which the grinding body produces the maximum grinding work is called the theory appropriate speed of ball mill. To get the maximum crushing power, the grinding body must have the maximum landing height. According to the calculation formula of the critical speed, the theoretical speed of the mill is 76% of the critical speed. In actual production, the speed of the mill fluctuates by 76%.

In actual production, considering rotational speed, we can not only consider the maximum crushing power, because the power of material grinding is from both impact crushing, as well as grinding effect.

Therefore, to consider the best economic indicators, which requires high mill production capacity, low power consumption per unit, less abrasion consumption of abrasive body and liner. Therefore, we must select the working speed, in addition to considering the diameter of the mill, production methods, lining shape, the filling factor of the grinding body, the type of grinding body, we must also take into account the nature of the grinding material, Grinding degree and so on. In order to more fully reflect the impact of these factors, we should determine the actual speed of the ball mill through scientific experiments.

Speed of **Ball mill **requires professional personnel to operate, we can not arbitrarily judge, otherwise it may lead to affect the production efficiency. If you are intrested in ball mill, or have any question about it, please contact us-Shanghai Clirik Machinery Co., Ltd.

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