Method and device for filling argon in continuous casting tundish

Abstract

The invention discloses a method and a device for filling a continuous casting tundish with argon, and belongs to the technical field of steelmaking and continuous casting. The device for filling the continuous casting tundish with the argon comprises a first closed mechanism, a second closed mechanism and an argon filling pipeline, wherein the first closed mechanism is arranged in the tundish and positioned between a first stick plug hole and a pouring hole of a tundish cover; a plurality of holes are formed in the lower part of the first closed mechanism; the second closed mechanism is arranged in the tundish and positioned between a second stick plug hole and the pouring hole of the tundish cover; a plurality of holes are formed in the lower part of the second closed mechanism; the argon filling pipeline is arranged in the tundish cover; and a plurality of argon blowing openings are formed in the argon filling pipeline. According to the method and the device for filling the continuous casting tundish with the argon, the blowing-in amount of the argon is reduced, the argon filling efficiency is improved, and the intake amount of external air is reduced; and furthermore, the rated aim of reducing secondary oxidization of molten steel is fulfilled, so that the comprehensive control effect for the first slab quality is better.

Description

technical field [0001] The invention relates to the technical field of steelmaking and continuous casting, in particular to a method and a device for filling argon in a continuous casting tundish. Background technique [0002] The tundish is the intermediate container between the ladle and the mold in the continuous casting production of the metallurgical industry. Before the tundish is poured, the tundish is filled with air, and the secondary oxidation of the molten steel in the first furnace is serious during the pouring process, which affects the cleanliness of the casting billet, and it is easy to cause the first billet, the second slab of the first furnace, and even the second slab of the first furnace. The coils rolled from the three slabs have a higher probability of surface inclusions. A steel mill sampled and analyzed the cleanliness of unsteady cast slabs, and found that the total oxygen content at the start of the casting was 1.88 times the average value of the w...

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Problems solved by technology

[0004] The present invention provides a method and device for filling argon in a continuous casting tundish, which solves or partially solves the problem that the pouring hole in the prior art is difficult to seal due to its large diameter and the shroud needs to be moved during the process of changing the tundish. As a result, the molten steel absorbs a large amount of air, and then the molten steel is oxidized again, which ultimately affects the technical problem of the quality of the slab

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