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Tundish low oxygen station control method and device

A control method and a tundish technology, which are applied in the field of continuous casting, can solve the problems of cleanliness of molten steel and low quality of cast slabs in a molten steel head furnace.

Active Publication Date: 2018-02-09
SHOUGANG JINGTANG IRON & STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Tundish low oxygen station control method and device

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Embodiment Construction

[0038] The embodiment of the present invention provides a method for controlling the low oxygen level of the tundish, which solves the technical problems of the cleanliness of molten steel in the head furnace and the quality of the slab. The general idea is as follows:

[0039] During the time period from the end of the tundish baking to the end of adding the covering agent into the tundish, argon gas is kept flowing into the tundish, thereby avoiding the contact of the surface of the molten steel in the tundish with air during the pouring process, so as to reduce the temperature of the opening. An oxidizing atmosphere is included in the pouring process to prevent the secondary oxidation of the exposed molten steel, so as to improve the cleanliness of the molten steel in the steel head furnace and the quality of the cast slab.

[0040] In order to better understand the above-mentioned technical solution, the above-mentioned technical solution will be described in detail below ...

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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...

Claims

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Application Information

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IPC IPC(8): B22D11/111B22D11/10B22D11/16
CPCB22D11/10B22D11/111B22D11/16
Inventor 刘延强罗磊安泽秋赵长亮袁天祥杨晓山梅宁王皓张鹏何文远肖华生肖茂元韩乐李向奎王胜东王宝动杨敬铭尹世超贾刘兵王延飞尚明洋
Owner SHOUGANG JINGTANG IRON & STEEL CO LTD
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