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Hyperbolic-type crystallizer copper pipe

A mold copper tube and hyperbolic technology, which is applied in the field of mold copper tubes, can solve the problems of reducing the thickness of the air gap, difficult to obtain a large gradient, increasing the heat transfer effect of the mold, and achieving the effect of increasing the pulling speed.

Active Publication Date: 2013-01-16
CONTINUOUS CASTING TECH ENG OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The object of the present invention is to provide a hyperbolic crystallizer copper tube, which overcomes the disadvantage that the parabolic taper curve is difficult to obtain a large gradient at the meniscus, and better It adapts to the shrinkage of the billet shell in the longitudinal direction of the mold, further reduces the thickness of the air gap in the longitudinal direction of the mold, better eliminates the adverse effects of the air gap, increases the heat transfer effect of the entire mold, and provides a high-efficiency continuous casting. Guaranteed

Method used

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  • Hyperbolic-type crystallizer copper pipe
  • Hyperbolic-type crystallizer copper pipe
  • Hyperbolic-type crystallizer copper pipe

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Experimental program
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Embodiment Construction

[0033] Notes in the figure: 1. Mold copper tube 2. Copper tube wall 3. Hyperbolic surface

[0034] According to the taper curve obtained in the content of the invention, we take a certain crystallizer copper tube as an example to illustrate the specific implementation of the invention. The main parameters of the continuous casting machine using the mold copper tube are as follows:

[0035] Casting machine type: full arc

[0036] Casting machine radius: 8m

[0037] Number of streams: 5 streams

[0038] Flow spacing: 1250mm

[0039] Billet section size: 170mm×170mm

[0040] Mold copper tube height: 900mm (effective height 800mm)

[0041] Casting steel type: Q235

[0042] Cooling water flow:

[0043] Design pulling speed:

[0044] Assuming that half of the shrinkage of the crystallizer cavity is z, the taper curve formula [1] is integrated to obtain the change law of z along the length direction of the crystallizer, which is expressed as follows:

[0045] ...

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Abstract

The invention relates to a hyperbolic-type crystallizer copper pipe, which is characterized in that a conical degree curve of an inner cavity of a crystallizer is a hyperbola; the conical degree curves of four surfaces are all hyperbolas; and a relative large curve gradient is close to a meniscus, so as to better meet the demand on the conical degree close to the meniscus and better adapt to the contraction of a billet shell along the longitudinal direction of the crystallizer, thereby further reducing the thickness of a clearance along the longitudinal direction of the crystallizer, better eliminating the harmful effect of the clearance, promoting a heat transfer effect of the whole crystallizer and meeting the demand on high pulling speed of the crystallizer copper pipe.

Description

technical field [0001] The invention relates to a mold copper tube for metallurgical continuous casting equipment, in particular to a novel mold copper tube designed with a hyperbolic taper. Background technique [0002] The mold is the first cooling equipment of the whole continuous casting machine, its cooling performance directly affects the quality of the slab, it is the "heart" of the continuous casting machine. There are many physical processes in the crystallizer, including the flow, phase change, and solidification of molten steel, the shrinkage and deformation of the slab, and various heat and mass transfer processes. Molten steel, mold slag, billet shell and mold constitute a complex coupling system of thermal state and mechanical state. [0003] The billet quality problems in the mold (such as off-square, bulging, corner cracks, longitudinal cracks, surface depressions, etc.) are all related to the uneven heat transfer between the billet shell and the copper tub...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/059
Inventor 倪赛珍李富帅陶金明
Owner CONTINUOUS CASTING TECH ENG OF CHINA