CN-120790316-B - Control method and system for composite mineral blending ball mill

CN120790316BCN 120790316 BCN120790316 BCN 120790316BCN-120790316-B

Abstract

The application relates to the technical field of ball mill control, and provides a control method and a control system of a compound mineral blending ball mill, wherein the control method comprises the steps of collecting driving current data, grinding sound data and vibration data, and constructing a current sequence, a grinding sound sequence and a vibration sequence of a collecting period; marking a target acquisition period, determining a grinding sound first slope, a grinding sound abrasion confidence coefficient, a current first slope, a current abrasion confidence coefficient, a vibration first slope and a vibration abrasion confidence coefficient of the target acquisition period, determining a steel ball abrasion coefficient of the target acquisition period, determining an abrasion difference coefficient of the target acquisition period, and controlling the rotational speed rate of the ball mill of the composite mineral admixture according to the abrasion difference coefficient and the rotational speed rate of the target acquisition period. The application can realize the self-adaptive control of the rotation speed of the ball mill of the composite mineral admixture.

Inventors

ZHU WEIQIANG
MO XIAOZHONG
WEN XIAOFENG
MU GUANGHUA
ZHAO JUN

Assignees

浙江同力重型机械制造有限公司

Dates

Publication Date: 20260508
Application Date: 20250808

Claims (3)

1. A method for controlling a composite mineral blend ball mill, the method comprising the steps of: Collecting driving current data, grinding sound data and vibration data at different collecting moments in different collecting periods, and constructing a current sequence, a grinding sound sequence and a vibration sequence of each collecting period; Recording any one acquisition period as a target acquisition period, determining a first slope of grinding sound and a grinding sound abrasion confidence coefficient of the target acquisition period according to the change trend of grinding sound data in a grinding sound sequence of the target acquisition period and the difference between the grinding sound sequences of the target acquisition period and the previous adjacent acquisition period, determining the first slope of grinding sound and the grinding sound abrasion confidence coefficient of the target acquisition period according to the grinding sound sequence of the target acquisition period, respectively determining the first slope of current, the current abrasion confidence coefficient, the first slope of vibration and the vibration abrasion confidence coefficient of the target acquisition period according to the current sequence and the vibration sequence of the target acquisition period, and combining the first slope of grinding sound and the change trend of vibration data in the vibration sequence of the target acquisition period; Determining a wear difference coefficient of the target acquisition period according to the difference of the current sequence, the grinding sound sequence and the vibration sequence of the target acquisition period and the first acquisition period and the difference of the steel ball wear coefficient of the target acquisition period and the first acquisition period; according to the abrasion difference coefficient and the rotation rate of the target acquisition period, the rotation rate control of the ball mill of the composite mineral admixture is realized; The method for determining the first slope of the grinding sound comprises the following steps: performing straight line fitting on the grinding sound sequence of the target acquisition period, and marking the slope of the fitted straight line as a first grinding sound slope of the target acquisition period; the method for determining the grinding sound abrasion confidence comprises the following steps: Taking the first slope of the grinding sound of the target acquisition period as an index value of an index function taking a natural constant as a base, and recording the reciprocal of the calculated value of the index function as the first index value of the grinding sound of the target acquisition period; Determining a first grinding sound ratio of the target acquisition period according to the difference between the grinding sound sequences of the target acquisition period and the previous adjacent acquisition period; The positive correlation processing result of the first grinding sound ratio value and the first grinding sound index value of the target acquisition period is recorded as grinding sound abrasion confidence coefficient of the target acquisition period; The method for determining the steel ball abrasion coefficient of the target acquisition period by combining the first slope of the grinding sound and the grinding sound abrasion confidence and the change trend of vibration data in the vibration sequence of the target acquisition period comprises the following specific steps: The number of the negative numerical values in the grinding sound first slope, the current first slope and the vibration first slope of the target acquisition period is recorded as the descending number of the target acquisition period; The average value of the grinding sound abrasion confidence coefficient, the current abrasion confidence coefficient and the vibration abrasion confidence coefficient of the target acquisition period is recorded as the abrasion confidence coefficient of the target acquisition period; equally dividing the vibration sequences of the target acquisition period into a first preset number of vibrator sequences, respectively calculating the kurtosis of each vibrator sequence, and determining the kurtosis ratio of the target acquisition period according to the variation trend of the kurtosis of all vibrator sequences divided by the vibration sequences of the target acquisition period; The positive correlation processing result of the descending number, the abrasion confidence coefficient and the kurtosis ratio of the target acquisition period is recorded as the steel ball abrasion coefficient of the target acquisition period; the method for determining the abrasion difference coefficient of the target acquisition period comprises the following steps: The difference value of the steel ball abrasion coefficients of the target acquisition period and the first acquisition period is recorded as the difference value of the steel ball abrasion coefficients of the target acquisition period; Determining initial trend similarity of the target acquisition period according to the difference of the current sequence, the difference of the grinding sound sequence and the difference of the vibration sequence of the target acquisition period and the first acquisition period; the normalized value of the ratio of the difference of the steel ball abrasion coefficients of the target acquisition period to the initial trend similarity is recorded as the abrasion difference coefficient of the target acquisition period; The method for determining the initial trend similarity of the target acquisition period comprises the following steps: sequence decomposition is carried out on the grinding sound sequence of the target acquisition period, a trend sequence of the grinding sound sequence of the target acquisition period is obtained, and the absolute value of the similarity of the trend sequences of the grinding sound sequence of the target acquisition period and the first acquisition period is recorded as the initial trend similarity of the grinding sound of the target acquisition period; The method comprises the steps of carrying out sequence decomposition on a vibration sequence of a target acquisition period to obtain a trend sequence of the vibration sequence of the target acquisition period, and recording an absolute value of similarity of the trend sequences of the vibration sequence of the target acquisition period and the vibration sequence of a first acquisition period as initial trend similarity of the vibration of the target acquisition period; the method comprises the steps of carrying out sequence decomposition on a current sequence of a target acquisition period to obtain a trend sequence of the current sequence of the target acquisition period, and recording an absolute value of similarity of the trend sequences of the current sequence of the target acquisition period and the current sequence of a first acquisition period as current initial trend similarity of the target acquisition period; The average value of the initial trend similarity of grinding sound, the initial trend similarity of vibration and the initial trend similarity of current in the target acquisition period is recorded as the initial trend similarity of the target acquisition period; the method for determining the first grinding tone ratio of the target acquisition period comprises the following steps: The ratio of the average value of grinding data contained in the grinding sequence of the target acquisition period to the grinding data of the previous adjacent acquisition period of the target acquisition period is recorded as a first grinding ratio of the target acquisition period; the method for determining the kurtosis ratio of the target acquisition period comprises the following steps: the kurtosis of all vibrator sequences divided by the vibration sequence of the target acquisition period is subjected to straight line fitting to obtain a normalized value of the slope of the fitting straight line, and the normalized value is recorded as the kurtosis slope of the target acquisition period; The very poor of the kurtosis of all vibrator sequences divided by the vibration sequences of the target acquisition period is recorded as the very poor of the kurtosis of the target acquisition period; And (5) recording the ratio of the kurtosis range and the kurtosis slope of the target acquisition period as the kurtosis ratio of the target acquisition period.
2. The control method of the composite mineral admixture ball mill according to claim 1, wherein the method for realizing the rotation speed rate control of the composite mineral admixture ball mill according to the abrasion difference coefficient and the rotation speed rate of the target collection period comprises the following specific steps: the product of the abrasion difference coefficient of the target acquisition period and a preset rotating speed rate adjusting value is recorded as the adjusting quantity of the target acquisition period, and the sum of the adjusting quantity and the rotating speed rate of the target acquisition period is recorded as the adjusting rotating speed rate of the next adjacent acquisition period of the target acquisition period; and taking the adjusted rotation speed rate of the target acquisition period as the rotation speed rate of the next adjacent acquisition period of the target acquisition period.
3. A composite mineral blend ball mill control system comprising a memory, a processor and a computer program stored in the memory and running on the processor, characterized in that the processor implements the steps of the method according to any one of claims 1-2 when executing the computer program.

Description

Control method and system for composite mineral blending ball mill Technical Field The application relates to the technical field of ball mill control, in particular to a method and a system for controlling a compound mineral blending ball mill. Background After ball milling, the superfine composite mineral admixture is finely ground, so that the superfine and homogenization of the particle size can be realized, the activity and reactivity of the mineral admixture are improved, the morphology and grading of the particles are optimized, and the utilization of solid waste resources is promoted. The ball ratio and the rotation speed rate of the ball mill in the fine grinding process are accurately regulated and controlled, so that the production efficiency can be improved, and the stability of the product quality can be ensured. In grinding of ultrafine sized composite mineral blends by a ball mill, the rotation rate to ball ratio is generally set to a fixed parameter during grinding because the mineral blend ratio is fixed. However, the steel balls are continuously worn in the grinding process, the ball ratio in the ball mill can dynamically fluctuate along with the wear of the steel balls, and at the moment, if a fixed rotation speed is still adopted, the grinding quality and the grinding efficiency of the ball mill can be influenced, and the stability of the product quality is influenced. Disclosure of Invention The application provides a control method and a control system of a compound mineral blending ball mill, which are used for solving the problem that the quality of a ground product is affected due to the fact that a fixed rotation rate is not matched with steel balls which are gradually lost in the fine grinding process of a ball mill, and the adopted technical scheme is as follows: In a first aspect, an embodiment of the present application provides a method of controlling a composite mineral blended ball mill, the method comprising the steps of: Collecting driving current data, grinding sound data and vibration data at different collecting moments in different collecting periods, and constructing a current sequence, a grinding sound sequence and a vibration sequence of each collecting period; Recording any one acquisition period as a target acquisition period, determining a first slope of grinding sound and a grinding sound abrasion confidence coefficient of the target acquisition period according to the change trend of grinding sound data in a grinding sound sequence of the target acquisition period and the difference between the grinding sound sequences of the target acquisition period and the previous adjacent acquisition period, determining the first slope of grinding sound and the grinding sound abrasion confidence coefficient of the target acquisition period according to the grinding sound sequence of the target acquisition period, respectively determining the first slope of current, the current abrasion confidence coefficient, the first slope of vibration and the vibration abrasion confidence coefficient of the target acquisition period according to the current sequence and the vibration sequence of the target acquisition period, and combining the first slope of grinding sound and the change trend of vibration data in the vibration sequence of the target acquisition period; Determining a wear difference coefficient of the target acquisition period according to the difference of the current sequence, the grinding sound sequence and the vibration sequence of the target acquisition period and the first acquisition period and the difference of the steel ball wear coefficient of the target acquisition period and the first acquisition period; And according to the abrasion difference coefficient and the rotation rate of the target acquisition period, the rotation rate control of the ball mill of the composite mineral admixture is realized. Further, the method for determining the first slope of the grinding sound comprises the following steps: and (3) performing straight line fitting on the grinding sound sequence of the target acquisition period, and recording the slope of the fitted straight line as a first grinding sound slope of the target acquisition period. Further, the method for determining the grinding sound abrasion confidence comprises the following steps: Taking the first slope of the grinding sound of the target acquisition period as an index value of an index function taking a natural constant as a base, and recording the reciprocal of the calculated value of the index function as the first index value of the grinding sound of the target acquisition period; Determining a first grinding sound ratio of the target acquisition period according to the difference between the grinding sound sequences of the target acquisition period and the previous adjacent acquisition period; And recording a positive correlation processing result of the first grinding sound ratio value and the first grindi