Rotating speed control method of ball mill based on grinding effect of steel balls in ball mill

Abstract

The invention provides a rotating speed control method of a ball mill based on the grinding effect of steel balls in the ball mill, and relates to the field of energy conservation and consumption reduction of efficient development and utilization of solid mineral resources. The rotating speed control method comprises the steps that coordinate systems XAY and xoy are established, and a detachment angle alpha, a fall-back angle beta and included angles theta and gamma of the steel balls are defined; the coordinates of a point B and a point C in the coordinate system XAY and the relationship between the angle alpha and the rotating speed of the mill are determined; the velocity component in the vertical direction of the steel balls at the point B is determined; the final speed of the steel balls at the point B are determined; the sine and cosine of the angle theta are determined; the coordinates of the point B of the steel balls in the coordinate system xoy are determined; the relationship between the angle beta and the angle alpha is determined; the cosine of the angle gamma is determined; the normal velocity of the steel balls falling back to the point B is determined; and a methodfor adjusting and controlling the rotating speed psi of the ball mill is determined. The rotating speed control method realizes the timely adjustment of the rotating speed of the ball mill by means ofa frequency conversion speed regulation technology, so that the working state of the ball mill is adapted to the specific properties of a processing object at any time, and the technical and economicindexes of the ore grinding process are always in the best state.

Description

technical field [0001] The invention relates to the technical field of energy saving and consumption reduction for efficient development and utilization of solid mineral resources, in particular to a method for controlling the speed of a ball mill based on the crushing action of steel balls in the ball mill. Background technique [0002] In the development and utilization of solid mineral resources, the crushing process of materials is one of the key links, and the energy consumption of the grinding operation alone is as high as 50% to 75% of the total energy consumption of the entire concentrator. However, since the speed of the ball mill currently used in production is not adjustable, the only way to improve the grinding efficiency is to change the size or shape of the grinding medium for different processing objects, so the improvement of the technical and economic indicators of the grinding process is very important. limited. As a result, the grinding operation has beco...

AI Technical Summary

Problems solved by technology

However, since the speed of the ball mill currently used in production is not adjustable, the only way to improve the grinding efficiency is to change the size or shape of the grinding medium for different processing objects, so the improvement of the technical and economic indicators of the grinding process is very important. limited

As a result, the grinding operation has become the bottleneck of energy saving and consumption reduction in the concentrator

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