Transverse adjustment method for spraying process of water mist cooling section of continuous annealing unit by taking control plate shape as target

Abstract

The invention discloses a transverse adjustment method for a spraying process of a water mist cooling section of a continuous annealing unit by taking a control plate shape as a target. The transverse adjustment method comprises the following steps: equipment characteristic parameters and product parameters are collected; an outlet plate shape curve and the temperature of a strip steel inlet are collected; according to the current outlet plate shape, a plate shape out-of-tolerance area in the strip steel width direction is calculated; and according to the plate shape out-of-tolerance amount of each section in the plate shape out-of-tolerance area, the transverse adjustment amount of the water mist cooling spraying process is calculated. According to the method, the continuous annealing outlet strip steel shape optimization is taken as the target, the cooling effect of the plate strip in the rapid cooling section and the internal relation between the process parameters such as the opening position, the number, the flow and the pressure of the nozzles of a rapid cooling device and the strip shape change are researched, and the quantitative control on the parameters such as the opening position, the number, the flow and the pressure of the nozzles is realized. The defect that the cooling position and the cooling degree cannot be accurately determined by adopting an empirical table method is avoided. Practical production and use prove that the plate shape quality of products is improved, and economic benefits are brought to enterprises.

Description

technical field [0001] The invention relates to the field of metallurgy, in particular to a method for laterally adjusting the spray process in the water mist cooling section of a continuous annealing unit aiming at controlling the plate shape. Background technique [0002] This technology originates from on-site production practice, and especially relates to a method for laterally adjusting the spray process in the water mist cooling section of the continuous annealing unit with the goal of controlling the plate shape. The retrieval keywords of the present invention include: water mist cooling, continuous annealing unit, and shape optimization. Searching with the above keywords, it can be found that in the field of metallurgy, no patents of similar technologies have been found. [0003] With the rapid development of the automobile industry in the direction of energy saving, lightweight, and green environmental protection in recent years, the application proportion of ultra...

AI Technical Summary

Problems solved by technology

However, other domestic and foreign companies have not yet found a unit that uses the powerful water mist cooling technology similar to the three-cold rolling continuous annealing unit.

In China, the water quenching process adopted by Baosteel’s pilot plant C122 unit has always had poor shape control. Although the unit’s follow-up technology has been improved and a set of flatness instrument is installed in the furnace, the flatness instrument can only meet the flatness requirements. Display function, not equipped with the corresponding shape automatic control function, can not realize the automatic closed-loop control of shape

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