A kind of tundish low oxygen level control method and device

Abstract

The invention discloses a tundish low oxygen station control method and device applied to the technical field of continuous casting. The method comprises the steps that after baking of a tundish at abaking station is finished, the tundish is started so as to introduce argon into the tundish with first flow; within the time period that the tundish is transported to a casting station from the baking station, and the time period from the time that the tundish receives molten steel from a steel ladle at the casting station to tundish casting starting, it is kept that argon is introduced into thetundish in the manner with the first flow; and during tundish casting starting, argon is introduced into the tundish in the manner of adjusting the first flow to second flow smaller than the first flow; in the process that the tundish casts the molten steel to a crystallizer, a covering agent is added into the tundish, and it is kept that argon is introduced into the tundish with the second flow;and after adding of the covering agent into the tundish is finished, argon is stopped from being introduced into the tundish. According to the method and device, the technical problems that the cleanliness of liquid steel head furnace molten steel and the casting blank quality are not high are solved.

Description

technical field [0001] The invention relates to the technical field of continuous casting, in particular to a method and device for controlling the low oxygen level of a tundish. Background technique [0002] The tundish is the intermediate container between the ladle and the crystallizer in the continuous casting production of the metallurgical industry. In order to prevent the air from entering the molten steel during the casting process, the protective pouring measures widely adopted by the current tundish mainly include: 1) between the ladle and the tundish Long nozzle pouring is adopted; 2) Submerged nozzle is used to protect the pouring between the tundish and the crystallizer; 3) Argon gas is introduced between the ladle sliding nozzle and the long nozzle to seal; 4) The upper nozzle of the tundish and the submerged nozzle of the tundish 5) Add covering agent to the surface of molten steel inside the tundish. [0003] However, in the actual production of the existing...

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Problems solved by technology

[0004] The embodiment of the present invention solves the technical problems of the cleanliness of the liquid steel in the head furnace and the low quality of the slab by providing a method and device for controlling the low oxygen level of the tundish

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