Method and device for controlling liquid level fluctuation of continuous casting crystallizer

Abstract

The embodiment of the invention provides a method and device for controlling liquid level fluctuation of a continuous casting crystallizer. The method comprises the following steps that whether a casting blank in the continuous casting crystallizer has the tendency of bulging or not is judged according to detection information, wherein the detection information comprises at least one of the fluctuation amplitude of the liquid level in the continuous casting crystallizer, the phase difference between a reference characteristic curve and a fluctuation curve of the liquid level and the rotation frequency of a reference driving roller, and the reference characteristic curve is obtained by carrying out frequency spectrum analysis on a change curve demonstrating how the moment of the reference driving roller in the continuous casting machine varies over time or a change curve demonstrating how the driving signal of the reference driving roller varies over time; and if it is judged that the tendency of bulging occurs, the compensation amount of a stopper rod is determined according to detection information; and the position of the stopper rod is adjusted according to the compensation amount so as to control the liquid level fluctuation of the continuous casting crystallizer. By means of the embodiment of the method and device for controlling liquid level fluctuation of the continuouscasting crystallizer, the liquid level fluctuation of the continuous casting crystallizer can be effectively controlled.

Description

technical field [0001] The invention belongs to the technical field of iron and steel manufacturing, and in particular relates to a method, device, terminal equipment and computer-readable medium for controlling liquid level fluctuations in a continuous casting crystallizer. Background technique [0002] The advancement of continuous casting technology has made a significant contribution to the rapid development of the steel manufacturing industry. The main equipment for continuous casting production is ladle, tundish and crystallizer, among which the crystallizer is a forced water-cooled bottomless copper ingot mold, which is the heart of continuous casting equipment, and its main function is to form a shell of a certain thickness as liquid steel. "Container", the crystallizer quickly and evenly cools the high-temperature molten steel continuously injected into it from the nozzle through the water-cooled copper wall, so that the continuous casting billet forms a primary bil...

AI Technical Summary

Problems solved by technology

During the pouring process, with the intensification of the fluctuation of the liquid level of the mold, the slag of the molten steel in the mold is caused, and the content of non-metallic inclusions under the skin of the slab increases significantly, which eventually affects the surface quality of the product. Longitudinal fracture breakout, or a serious accident involving steel breakout

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