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Submerged nozzle for sheet billet continuous casting crystallizer

A technology of thin slab continuous casting and crystallizer, which is applied in the direction of casting melt container, casting equipment, manufacturing tools, etc. It can solve the problems such as the outlet angle and flow speed are not ideal, so as to achieve uniform distribution of mold slag and prevent slag entrainment , the effect of reasonable liquid surface velocity

Inactive Publication Date: 2010-06-16
CHONGQING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of submerged nozzle is not very effective in controlling the outlet angle and flow velocity of molten steel, and further improvement is still needed to ensure reasonable liquid surface velocity and mold slag coverage

Method used

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  • Submerged nozzle for sheet billet continuous casting crystallizer
  • Submerged nozzle for sheet billet continuous casting crystallizer
  • Submerged nozzle for sheet billet continuous casting crystallizer

Examples

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Embodiment Construction

[0015] Such as figure 1 , 2 Among them, the submerged nozzle for the thin slab continuous casting crystallizer of the present invention mainly includes an upper end 1, a transition section 2, an upper flat section 3, a nozzle outlet 6 and a lower flat section 8, the upper end 1 is in the uppermost section and is in the shape of a conical funnel, and the transition section 2 is connected below the upper end 1, the transition section 2 is cylindrical and has a cross-sectional shape, the upper flat section 3 is below the transition section 2, the lower flat section 8 is below the upper flat section 3, the upper flat section 3 and the lower flat section 8 All are flat flat sections with two-way changes in the internal cross-sectional area of ​​the nozzle. The cross-sectional area gradually shrinks and the longitudinal cross-sectional area gradually expands. The degree of contraction of the cross-sectional area of ​​the upper flat section 3 and the degree of expansion of the longit...

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Abstract

The invention discloses a submerged nozzle for a sheet billet continuous casting crystallizer, which comprises an upper end and a transition section, wherein the transition section is positioned below the upper end, the transition section is in the shape of a cylindrical constant section, and an upper flat section and a lower flat section are positioned below the transition section; a first guide plate and a second guide plate which are symmetrical are arranged under the lower flat section, two nozzle outlets are formed between the lower end of the lower flat section and the first guide plate and between the lower end of the lower flat section and the second guide plate, and the first guide plate and the second guide plate are cuboid; and a conical flow splitting body is arranged at the middle position below the first guide plate and the second guide plate. The two guide plates are added into the submerged nozzle to perform the action of changing the angle and the speed of molten steel flowing out of the nozzle, so that the liquid level of the crystallizer keeps stable at a high flow speed to achieve the uniform distribution of protective slag, thereby effectively preventing slag entrapment and inhabiting the generation of cracks on a casting blank; and the molten steel can uniformly flow in the crystallizer and achieve reasonable liquid level speed and protective slag coverage.

Description

technical field [0001] The invention relates to the technical field of thin slab continuous casting, and in particular provides a submerged nozzle capable of ensuring uniform flow of molten steel, stable liquid level and uniform distribution of mold slag in a CSP thin slab continuous casting crystallizer. Background technique [0002] Continuous steel casting is the technology of continuously condensing molten steel into billets, in which the water-cooled copper mold is used as the crystallizer, and the nozzle made of refractory material connects them together, and the molten steel is continuously injected into the crystallizer through the nozzle Internal cooling. Due to the small space of the thin slab mold and the fast casting speed, the molten steel flows violently in the mold, which brings many problems to the stability of the liquid steel level in the mold, the uniform formation of the solidified slab shell and the continuous casting process. Therefore, controlling the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/10B22D41/50
Inventor 唐萍向敏文光华刘连兵李娇
Owner CHONGQING UNIV
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