A method and system for automatic control of tundish liquid level

Abstract

The invention discloses a tundish liquid level automatic control system, which comprises a PLC controller, an intelligent control terminal, a bale, a tundish, a long water pipe, a bale slide, and a crystallizer. There is a pulse switch on it, a group of weighing heads are symmetrically arranged on both sides of the lower end of the tundish, a pouring pipe is arranged at the bottom of the tundish, a proportional valve is arranged in the pouring pipe, and a crystallizer is arranged at the bottom; it also includes: Adapted to the heavy head, a set of pressure sensors used to measure the weight of the tundish; a hydraulic telescopic rod used to lift the weighing head so that the weighing head is separated from the pressure sensor; an inclined plate used to change the angle of molten steel entering the tundish, tilting The plate is set on the side of the liquid inlet on the inner top surface of the tundish, at a 45° angle to the inner top surface; it is used to realize the serpentine mechanical arm for changing the position and angle of the ladle slide; it is used to realize the transfer of molten steel from the middle The pouring head that pours into the slab. The invention can effectively eliminate the swirling slag of the ladle.

Description

technical field [0001] The invention relates to the field of continuous casting, in particular to an automatic control method and system for a tundish liquid level. Background technique [0002] In the production process of continuous casting, as the molten steel level drops in the later stage of casting, due to the action of the earth's deflection force (Coriolis force), a confluence vortex will be generated at the steel-slag interface in the ladle, and the vortex will easily cause slag entrainment. When the height of molten steel is lower than the critical height of the vortex, the vortex is even involved in gas, the concave vortex becomes more and more obvious, and the swirling velocity becomes larger and larger until it passes through the nozzle. The height of the liquid level at this time is called the penetration height, resulting in a large Slag enters the nozzle, which is very unfavorable to the production of clean steel. [0003] At present, the existing tundish li...

AI Technical Summary

Problems solved by technology

[0004] 1) The gravity sensor is always in a squeezed state, which is easy to be damaged and also prone to large errors;

[0005] 2) Only by monitoring the weight of the tundish to interfere with the generation of vortex in the ladle, the effect is poor;

[0006] 3) The adjustable angle of the big bag skateboard is limited

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