A device for suppressing crystallizer liquid level fluctuation at high pulling speed

Abstract

The invention discloses a device for inhibiting mold level fluctuation at high drawing speed and belongs to the technical field of metallurgical process optimization. The device comprises a gathering mechanism, a distribution mechanism and a connecting mechanism, the side face of a gatherer is provided with a gathering opening communicated with the gatherer, a flow baffle is arranged inside the gatherer, a round hole is arranged in the upper portion of the gatherer and communicated a connecting pipe thereon, and the connecting pipe is communicated with a flow outlet; a distributor is a cuboid, a plurality of through holes are arranged in the upper portion of the distributor, and a rectangular groove is arranged in the lower portion of the distribution; the flow outlet is connected with hanging pillars, the hanging pillars are connected with the distributor, and one end of a large hanging pillar is connected with the distributor while the other end of the same is connected with the outside. The device can inhibit mold level fluctuation at the high drawing speed, under-reflux intensity in a mold can be weakened, most of inclusions move to the surface of molten steel with liquid flow to be absorbed by mold flux, coatings on the surface can absorb part of the inclusions, and the inclusions in the molten liquid can be effectively removed.

Description

technical field [0001] The invention relates to the technical field of metallurgical process optimization, in particular to a device for suppressing liquid level fluctuations in crystallizers at high casting speeds. Background technique [0002] During the production process of the continuous casting process, molten steel enters the mold from the tundish through the submerged nozzle. When the casting speed is high, there will be large liquid level fluctuations in the crystallizer. This is because at the same mold width, the casting speed increases, and the speed and flow rate of the stream outlet side hole increase, and the stream stream The impact force on the narrow surface of the crystallizer increases, resulting in an increase in the strength of the upper reflux of the stream, and an increase in the shear force between the upper reflux area and the slag surface, resulting in fluctuations in the liquid level of the entire mold to varying degrees, among which the liquid le...

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Problems solved by technology

[0007] The purpose of the present invention is to overcome the problem that the device for suppressing the fluctuation of the liquid level of the crystallizer in the prior art cannot achieve a good effect of suppressing the fluctuation of the liquid level in the crystallizer, and cannot remove the inclusions that flow back into the deep part of the molten steel with the crystallizer. To solve the problem, a device for suppressing the liquid level fluctuation of the mold at high casting speed is provided. The technical solution of the present invention can effectively suppress the liquid level fluctuation of the mold at high casting speed, thereby reducing slag entrainment and longitudinal cracking of the slab The probability of leakage, etc. can be effectively removed, and the inclusions that enter the deep part of the molten steel with the backflow of the crystallizer can be effectively removed

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