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Slab crystallizer taper design method

A design method and crystallizer technology, applied in the field of steelmaking-continuous casting, can solve problems such as insurmountable slab shells

Active Publication Date: 2013-11-27
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Similarly, this technology only adjusts the taper size of its narrow face based on the existing linear copper plate structure of the crystallizer, so it cannot overcome the problems encountered in the solidification of the billet shell in the traditional mold

Method used

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Embodiment Construction

[0068] An embodiment of the present invention will be further described below in conjunction with the accompanying drawings.

[0069]The solidification of the billet shell in the crystallizer produces shrinkage and deformation. Affected by the inconsistency of the shrinkage in the height direction of the crystallizer, the billet shell is often insufficiently compensated at the upper part of the mold and excessively compensated at the lower part of the crystallizer. The upper part of the crystallizer is prone to cracks, while the copper plate in the lower part of the crystallizer is severely worn. In addition, since the shrinkage and deformation of the billet shell in the mold are mainly concentrated in the area near the corner of the billet shell, the area near the corner of the billet shell is often caused to significantly reduce the heat transfer rate due to the concentrated distribution of mold slag and air gaps in this area, resulting in The "hot spot" of the billet shell ...

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Abstract

The invention discloses a slab crystallizer taper design method, and belongs to the field of steelmaking-continuous casting. The slab crystallizer taper designed by the invention is capable of sufficiently compensating the contraction of a slab shell in the crystallizer, effectively inhibiting the deformation of the slab shell in the crystallizer and preventing the continuous casting slab surface and subsurface crack from frequently occurring since the initially set slab shell is great in deformation at the upper part of the crystallizer; the slab crystallizer taper designed by the invention can be used for effectively eliminating the hot points at corner adjacent region of the wide surface and narrow surface of the slab shell so as to realize the uniform growth of the slab shell in the crystallizer; the slab crystallizer taper designed by the invention can be used for maximally lightening the abrasion of the copper plate of the crystallizer and prolonging the service life of the crystallizer; and the slab crystallizer taper designed by the invention can be used for accelerating the heat transfer of the corner part and the narrow surface of the slab shell, increasing the strength of the slab shell out of the crystallizer and lightening the narrow surface bulging of the slab shell.

Description

technical field [0001] The invention belongs to the field of steelmaking-continuous casting, and in particular relates to a method for designing the taper of a slab crystallizer. Background technique [0002] As the high-efficiency heat transfer device of the continuous casting machine, the crystallizer is responsible for the initial solidification of the high-temperature molten steel to form a billet. The stress state and heat transfer uniformity of the billet shell in it directly determine the surface and subcutaneous quality of the continuous casting billet. In actual steel continuous casting production, the slab shell gradually solidifies in the mold, and then shrinks significantly along the center direction of its wide and narrow faces and leaves the mold. In this process, due to the lack of support by the copper plate of the mold, the shell of the initial solidification is deformed in the mold under the action of hydrostatic pressure, resulting in significant tensile s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/057B22D11/18
Inventor 蔡兆镇朱苗勇祭程吴晨辉
Owner NORTHEASTERN UNIV
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