Intelligent fine cooling control method for normalizing acid pickling unit

Abstract

The invention discloses an intelligent fine cooling control method for a normalizing acid pickling unit. According to a target cooling temperature of strip steel in the normalizing cooling process ofa furnace, by means of a cooling model built on the basis of basic data of cooling section equipment, strip steel information data and the target cooling temperature of the strip steel, electromagnetic valve preset data for controlling the cooling speed is given, then the actual performance is detected according to the transverse and longitudinal temperatures of the strip steel, and the set valueof an electromagnetic valve is fed back and corrected, so that the strip steel is uniformly cooled in the transverse direction and the longitudinal direction, and finally the strip steel is good in plate shape and stable in performance whether in the longitudinal direction or the transverse direction. In addition, a strip steel cooling self-adaptive model and a method for correcting models betweendifferent steel coils can meet the requirement for control over the cooling speed uniformity of strip steel made from the same material, and can also achieve accurate control over strip steel made from different materials.

Description

technical field [0001] The invention belongs to the normalized pickling cooling technology, in particular to an intelligent fine cooling control method for a normalized pickling unit. Background technique [0002] Normalization is a process in which the steel coil is heated to 30-50°C above the complete austenitization temperature, and after a period of heat preservation, it is cooled in the air or sprayed with water, sprayed or blown in the air after coming out of the furnace. For many functional materials, such as silicon steel sheets, in order to refine the grains and uniformize the distribution of carbides, the temperature of the steel coils in the normalized annealing unit often reaches above 700°C, and then the temperature of the strip steel is lowered to below 100°C by rapid cooling, so as to Guarantee the stability and safety of equipment production in the post-processing section. Water cooling is widely used because of its fast cooling speed, high production effici...

AI Technical Summary

Problems solved by technology

[0004] 1. At present, the process control of the water-cooling section does not solve the problems of inconsistent cooling speed of various parts of the strip, poor plate shape and uneven transverse performance caused by stress due to temperature difference, which affects the stable rolling of the subsequent process and the stability of the quality of the finished product;

[0005] 2. At present, the process control of the water-cooling section cannot establish an adaptive model of cooling speed and strip running speed, cooling water temperature, flow rate and material cooling mode, and cannot realize dynamic adjustment of relevant control parameters, resulting in large horizontal and vertical strip steel. difference

However, this method focuses on controlling the stability of the temperature at the longitudinal fixed point of the strip, and lacks a control method for the uniformity of cooling in the transverse direction of the strip; in addition, this method also lacks a control method for uniform cooling between different steel types

[0008] To sum up, there are still problems to be solved for the inconsistent cooling speed of the strip in the longitudinal and transverse directions, resulting in poor shape and uneven performance, and how to reduce or even eliminate the difference in the transverse and longitudinal directions of the strip.

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