Fuzzy Control Method of Cement Mill Powder Sorting System

Abstract

The invention provides a fuzzy control method for a separation system during a cement grinding production process. The method comprises the following steps: S1, a variable membership function is built, and a fuzzy variable assignment table is acquired; S2, a fuzzy control rule is built, and fuzzy relation matrixes RRmp and Rv are acquired; and S3, according to a variable acquired instantly, a fuzzy control quantity is obtained through fuzzy calculation, and through a computer incremental control method, the cement grinding separation system is controlled. The fuzzy control method is adopted, the fuzzy relation between the rotation speed of the separator and specific surface area of milled cement and sieve residue and the fuzzy relation between a cold air valve and the specific surface area of the milled cement and the sieve residue are built, and a scientific and optimal separation process during the cement grinding production process can be realized.

Description

technical field [0001] The invention relates to a fuzzy control method for a powder selection system in a closed-flow cement grinding production process, in particular to a method for optimizing the particle size distribution of P.O.425 exiting cement and automatically adjusting the speed of a powder separator and the opening of a cold air valve. Background technique [0002] For the cement grinding process of the closed-circuit process, the ground material enters the powder selection system driven by the airflow, and under the action of the rotating impeller of the powder selection machine in the powder selection system, the fine particles pass through the screening smoothly to become the grinding cement, and the coarse particles Re-enter the mill for re-grinding. Therefore, the speed of the impeller of the classifier affects the specific surface area and sieve allowance of the cement to a large extent. The size of the airflow that drives the materials also affects the work...

AI Technical Summary

Problems solved by technology

The size of the airflow that drives the materials also affects the working conditions of the powder selection system. Too strong airflow can cause coarse particles to escape from the screening, and too weak airflow can make the original fine materials unable to pass through the screening and pass through the cold air valve. The size of the airflow to be adjusted also greatly affects the specific surface area and sieve allowance of the ground cement

The above explanations show that the speed of the powder selection machine and the opening of the cold air valve in the powder selection system are the key control parameters of the powder selection system. Too large or too small will cause either the particle size distribution of the grinding cement to be unreasonable and affect the quality. Either the production process is in a state of over-grinding, which affects the output

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