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Method and device for carrying out protected casting for shaped blank continuous casting by using single immersed nozzle

A special-shaped billet continuous casting and immersion technology, which is applied in the field of metallurgical continuous casting steel protection and casting, can solve problems such as unreasonable temperature field, and achieve the effect of promoting the floating of inclusions, improving uniformity and improving quality.

Inactive Publication Date: 2007-12-26
LAIWU IRON & STEEL GRP
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Problems solved by technology

[0005] The purpose of the present invention is to provide a method and device for continuous casting of special-shaped billets, which can realize the protection of molten steel injection from the tundish to the crystallizer in continuous casting of special-shaped billets, and at the same time solve the problem of mold existing when casting special-shaped billets with a single submerged nozzle The irrationality of the flow field and temperature field of the inner steel liquid; and realize the rapid replacement of the submerged nozzle without closing the injection flow and opening the casting during the casting process, thereby improving the single-ladle continuous pouring time of the tundish

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  • Method and device for carrying out protected casting for shaped blank continuous casting by using single immersed nozzle

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Embodiment Construction

[0028] As shown in Figure 1, the method of the present invention is: insert a submerged nozzle 6 in the middle of the web plate of a shaped billet crystallizer 5 for casting, and the upper nozzle 2 of the tundish 1 through the quick change mechanism 8 above the submerged nozzle connected to form a closed injection channel between the tundish 1 and the crystallizer 5; above the upper nozzle 2, a stopper rod 3 is used to control the injection flow of molten steel so as to realize the liquid level control of the crystallizer.

[0029] The device of the present invention includes a tundish 1 , a submerged nozzle 6 and a profile crystallizer 5 . The tundish 1 is at least provided with an upper nozzle 2 and a corresponding stopper rod 3; there is also at least one quick change mechanism 8 and a submerged nozzle 6; the submerged nozzle 6 is connected to the bottom of the tundish 1 The quick-change mechanism 8 is connected with the upper nozzle 2 in the tundish 1, and the submerged no...

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Abstract

The invention relates to a method and device that adopts water gap to take shaped blank continuous casting protecting casting. It inserts a dipped water gap into the center position of shaped blank crystallizer web to take casting. The upper part of dipped water gap connects to upper water gap of pouring basket. Molten steel flowing channel is formed between pouring basket and crystallizer. The stopper is used to control molten steel flow control to realize indicating control in crystallizer. The invention could realize full process protecting cast of shaped blank continuous casting to ensure cleanliness of molten steel.

Description

technical field [0001] The invention relates to the metallurgical continuous casting steel protective casting technology, in particular to the special-shaped billet continuous casting protective casting technology. Background technique [0002] Continuous casting protection casting refers to isolating molten steel from air to prevent secondary oxidation of molten steel during continuous casting and ensuring the cleanliness of molten steel. It is an important measure to improve the quality of billet. It is also an extremely effective technique. The protection pouring of the whole continuous casting process includes four aspects: (1) protection of molten steel injection from ladle to tundish; (2) protection of molten steel level in tundish; (3) protection of molten steel injection from tundish to mold ; (4) Protection of the molten steel surface of the crystallizer. [0003] Due to the complex cross-section of the billet used to produce hot-rolled H-shaped steel and the rela...

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Application Information

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IPC IPC(8): B22D11/103
Inventor 董杰吉张婕付博李红建韩文习王学新卢波邓存善
Owner LAIWU IRON & STEEL GRP
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