Flexible measuring method for overflow particle size specification of ball mill grinding system

Abstract

The invention relates to a method of soft detecting overflowing particle size index of mine-milling loop spiral grader, composed of ball mill and spiral grader and used to mill ore in mine milling working stage of preparation plant, adopting the online course data provided by routine distributed computer control system and routine detecting instrument and combining with time variable to reflect the change of mine milling medium, by a little artificial sampling, building a grader overflowing particle size soft-measuring model composed of neural network, realizing the soft measurement of grader overflowing particle size of mine milling system. It reduces the cost and maintenance working load; reduces the indeterminacy of artificial operation and enhance the time effectiveness of measurement, and at the same time helpful to realize the optimized control and operation of mine milling course.

Description

technical field [0001] The invention relates to the field of measurement technology in automation technology, in particular to the overflow of the spiral classifier, the final product of the wet grinding circuit composed of a ball mill and a spiral classifier, which is used to grind ore in the grinding section of a mineral processing plant. A method for soft-sensing granularity indicators. Background technique [0002] In the mineral processing industry, the wet grinding circuit composed of ball mills and spiral classifiers is widely used to grind ore to the particle size range required by the process. Too large or too small particles will have an adverse effect on the subsequent separation process. Therefore, grinding The final product of the mining circuit - the overflow particle size of the spiral classifier (also called grinding particle size, overflow particle size) is an important indicator to measure the operation quality of the grinding circuit. At present, there ar...

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Problems solved by technology

At present, there are two conventional detection methods for grinding particle size: one is offline manual sampling and manual measurement in the laboratory; the other is online measurement using a particle size detection device—a particle size meter. The disadvantage of the former method is that : 1. The influence of human factors is large during manual operation, and the objectivity of the measurement results is poor; 2. The time interval of measurement is long, and the time for feedback of measurement results is also long, so the obtained information lacks guiding significance for operators; the second method is insufficient. The reason is that although accurate, objective and timely measurement results can be obtained, the particle size meter is expensive, and it is difficult to equip most of the concentrators in my country, and the workload of on-site maintenance is also huge. The grinding particle size of the grinding circuit formed by the spiral classifier adopts the soft measurement method

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