No matter what kind of ball mill, steel ball is essential. Because the main role of steel ball in the ball mill is to impact the material broken, but also play a certain role in grinding. Therefore, the purpose of steel ball grading is to meet the requirements of these two aspects. The grinding effect has a direct impact on the grinding efficiency, and ultimately affects the output of the ball mill. Whether the grinding requirements can be met depends on whether the grading of steel balls is reasonable, including the size of steel balls, ball diameter series, the proportion of balls of various specifications, etc.
To determine these parameters, in addition to the size of the ball mill specifications, the internal structure of the ball mill, product fineness requirements and other factors, but also consider the characteristics of grinding materials (easy to wear, particle size, etc.).
In order to effectively crush the materials, the following principles must be followed in determining the gradation:
First of all, the steel ball should have enough impact force, so that the ball mill steel ball has enough energy to break the particle material, which is directly related to the maximum ball diameter of the ball;
Secondly, the steel ball should have enough impact times on the material, which is related to the steel ball filling rate and average ball diameter. When the loading amount is fixed, on the premise of ensuring sufficient impact force, the diameter of the grinding body should be reduced as far as possible and the number of steel balls should be increased to improve the impact times on the material, so as to improve the crushing efficiency;
Finally, the material in the mill has enough time to ensure that the material is fully crushed, which requires the steel ball to have a certain ability to control the flow rate of materials.
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