Slag carry-over detection method and device based on image recognition of vortex on surface of molten steel

Abstract

The invention relates to the field of automatic control in metallurgical industry, and aims to provide a slag carry-over detection method and a slag carry-over detection device based on image recognition of a vortex on the surface of molten steel. The slag carry-over detection method comprises the following steps of: arranging a camera above a ladle, connecting the camera to an image signal detection unit and an industrial personal computer through a cable in sequence, and processing and extracting an image to obtain three tapping slag inclusion states. Slag carry-over prediction accuracy and stability are improved according to the essence of ladle slag carry-over; the central position and state characteristic quantity information of the vortex on the surface of the molten steel in the ladle are obtained by a free surface vortex recognition method, so that characteristic information is extracted under the complex working condition on a continuous casting site; and a function of detection before slag carry-over is realized, the quality of the molten steel is effectively controlled, and yield is improved.

Description

technical field [0001] The invention relates to the field of automatic control of the metallurgical industry, in particular to a slag detection method and device based on vortex image recognition on the surface of molten steel for continuous casting production. Background technique [0002] With the advancement of metallurgical technology and the continuous improvement of steel varieties and quality, the requirements for the purity of molten steel in steel continuous casting production are getting higher and higher. In the continuous casting process, the oxidant and impurities in the ladle are mixed to form liquid steel slag, whose specific gravity is only about one-third of the molten steel, so it will float on the upper part of the molten steel. In the later stage of molten steel pouring, affected by the vortex, the molten steel slag will gradually flow from the ladle into the tundish, which will affect the quality of the steel, reduce the service life of the tundish, and ...

AI Technical Summary

Problems solved by technology

The disadvantages of the electromagnetic identification method are: the structure of the device is complex, the installation process is cumbersome, and it takes 3 to 6 working days, and the continuous casting production equipment needs to be modified to a certain extent during installation, which will delay production; the service life is short and maintenance High cost, because the electromagnetic coil works in a harsh high-temperature environment, it is easy to be damaged, which makes the detection system invalid, so regular maintenance and replacement of the coil are required

The bottleneck of the vibration detection method is mainly that the vibration signal is weak. Due to the limited impact ability of the steel flow, the vibration signal collected by the shroud is easily covered by the interference of the continuous casting production site environment, which leads to wrong judgments of the system and affects the stability of the system. sex

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