Device and method for measuring material quantity of multifunctional self-setting ball mill

Abstract

The invention relates to a ball grinder and discloses a device and a method for measuring the inventory of a multifunctional, self-rectifying and fixed-ball grinder. The device comprises a noise probe of the ball grinder and an inventory transducer of the self-rectifying and fixed-ball grinder. The method comprises the following steps: (a) noise energy is extracted and noise frequency spectrum is analyzed; (b) the largest grinding current of the ball grinder is calculated and determined; (c) measurement is implemented automatically in real time, and a curve of the relation between grinding current and the inventory of the ball grinder as well as a curve of the relation between grinding noise and the inventory are rectified; (d) the relation between the grinding current and the inventory of the ball grinder and the relation between the grinding noise and the inventory are fitted, and the inventory of the ball grinder is calculated; (e) the quantity of steel balls inside the ball grinder is determined and output according to the largest grinding current and characteristic spectrum change; (f) the optimal inventory of the ball grinder is determined and output according to noise spectrum change when various materials are fed into the ball grinder. The invention is stable, reliable and characterized by full-scale measurement and long-time accurate measurement.

Description

technical field [0001] The invention relates to a ball mill, in particular to a multifunctional self-tuning ball mill material volume measuring device, and also relates to a multifunctional self-tuning ball mill material volume measurement method. Background technique [0002] The traditional detection method of ball mill material volume: [0003] 1) Judging the amount of material by the mill current (ball mill motor current signal): Judging the load of the crushed material according to the magnitude of the mill current. However, due to the non-monotonicity of ball mill material volume and mill current, that is, when the material is less or more, the current may drop. Moreover, the current will also change due to the amount of steel balls; therefore, it can only be used to judge the change trend of materials in a small range, and cannot accurately determine the amount of materials in the full range. [0004] 2) Judging the amount of material by grinding noise: Since the sp...

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Problems solved by technology

However, the differential pressure is greatly affected by the total air volume, and the airflow disturbance is also large

Therefore, this method can only qualitatively determine the amount of material, but cannot quantitatively measure the material

[0006] figure 1 Shown is the relationship between the material volume of the ball mill, the milling current and the milling noise. It can be seen that this relationship is very nonlinear. At the same time, this relationship curve will fluctuate up and down due to the addition and wear of steel balls in the ball mill. Therefore, a single relationship can only be used. Can determine the change trend of material volume in a small range, but cannot determine the exact load of the ball mill

[0007] Through the above analysis, it can be seen that the original three material measurement methods are nonlinear, and are greatly disturbed by other factors, so it is impossible to accurately measure the amount of material in the ball mill for a long time

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