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

A measurement method, ball mill technology, applied in the direction of measurement devices, particle size analysis, particle and sedimentation analysis, etc., can solve the problems of poor objectivity of measurement results, long feedback time of measurement results, and high price of particle size meters

Inactive Publication Date: 2004-09-01
NORTHEASTERN UNIV
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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 measu...

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

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Embodiment Construction

[0103] The embodiment of the present invention is a grinding series of the weak magnetic roasted ore of a large-scale iron ore concentrator. The main iron ores of this concentrator are pyrite and limonite, and the gangues are mainly barite, quartz, jasper and iron dolomite. The actual iron content of the ore is 33%. After sorting, the weak magnetic ore After the roasting process, it is transported to the weak magnetic separation cylinder silo. The schematic diagram of the grinding system is shown in Figure 1. The roasted ore in the weak magnetic separation cylinder silo is discharged by the electric vibration feeder, and then fed by the ore belt. The machine is sent into the ball mill, mixed with the additional water at the ball mill inlet, and ground into the ore pulp in the ball mill. This stage of grinding adopts a grid-type ball mill. Ball milling forms a closed circuit with primary ball milling. The overflow of the spiral classifier (that is, the final product of this pr...

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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...

Claims

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Application Information

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IPC IPC(8): G01N15/02
Inventor 岳恒赵大勇柴天佑
Owner NORTHEASTERN UNIV
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