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Compound sealing method for kerf in soft contact electromagnetic continuous casting crystallizer

A continuous casting crystallizer and composite sealing technology, applied in the direction of pressure inorganic powder coating, coating, metal material coating technology, etc., to achieve the effect of safe and reliable cooling water circuit, good sealing performance, and simple processing technology

Active Publication Date: 2020-03-27
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This sealing method effectively solves the problem of sealing the kerf of the full water-cooled soft-contact mold, avoids the safety hazard caused by the leakage of molten steel and the contact with cooling water, and at the same time meets the requirements of the high-frequency electromagnetic field on the insulation and magnetic conductivity of the copper tube of the mold. Requirements, with the advantages of high strength, high rigidity and good heat resistance, suitable for application in industrial production

Method used

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  • Compound sealing method for kerf in soft contact electromagnetic continuous casting crystallizer
  • Compound sealing method for kerf in soft contact electromagnetic continuous casting crystallizer
  • Compound sealing method for kerf in soft contact electromagnetic continuous casting crystallizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] In this example, see Figure 1-3 , a soft-contact electromagnetic continuous casting mold slit compound sealing method, in which a hollow slit 3 is made on the mold wall 1, and then the slit 3 is cleaned and pretreated, and the hollowed slit 3 runs through the mold The inner and outer surfaces of the wall 1; filling material 14 is added in the middle of the slit 3, and the filling material 14 is a poor conductor of electricity, so that the filling material 14 fills the middle part of the slit 3, and the surface of the filling material 14 does not reach the slit 3 The surface of the crystallizer wall 1 in the direction of the opening forms a shallow groove; then continue to add sealing material 15 to the shallow groove until the shallow groove is filled, and the sealing material 15 adopts a material that can be firmly combined with the crystallizer matrix material; thereby making the surface of the sealing material 15 It is flush with the surface of the mold copper tube ...

Embodiment 2

[0030] The present embodiment is basically the same as the embodiment, and it is pointed out in particular that:

[0031] In the present embodiment, select the circular copper tube of pure copper crystallizer for use, and the diameter of the copper tube is 180mm, and the slit is started at 30mm below the top surface of the copper tube of the crystallizer; the slit 3 has a width of 1mm and a length of 150mm. There are 30 equidistant slits 3 in the circumferential direction, and the wall thickness of the copper pipe is 40mm. Firstly, the slits 3 are cleaned and sandblasted, and the thermal spraying method is used for thermal spraying, and then the middle part of the slit is sprayed and preheated to 1000°C ZrO 2 powder to make ZrO 2 The powder fills the middle part of the slit 3, the filling thickness d is 38mm, and the ZrO 2 The surface of the powder filling material does not reach the surface of the crystallizer wall in the direction of the opening of the slit, forming a shal...

Embodiment 3

[0034] This embodiment is basically the same as the previous embodiment, and it is particularly pointed out that:

[0035] In this example, see Figure 4 , a soft-contact electromagnetic continuous casting mold slit composite sealing method, making a non-hollow slit 3 on the mold wall 1, and the non-hollow slit 3 is a deep slit open toward the outer surface of the mold wall 1 Groove 16; then clean and pre-treat the slit 3, the hollow slit 3 runs through the inner and outer surfaces of the crystallizer wall 1; add a filling material 14 in the middle of the slit 3, and the filling material 14 is a poor conductor of electricity , make the filling material 14 fill up the middle part of the slit 3, and make the surface of the filling material 14 less than the surface of the crystallizer wall 1 in the opening direction of the slit 3, forming a shallow groove; then continue to add the sealing material 15 to the shallow groove until it is filled The shallow groove is full, and the se...

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Abstract

The invention discloses a compound sealing method for a kerf in a soft contact electromagnetic continuous casting crystallizer. A cold spraying method or a hot spraying method or a welding method is adopted. Firstly, filling materials is fed into the kerf to fill up the middle of the kerf, then sealing materials are fed into the kerf from an inner chamber and the outer wall of a copper tube of a crystallizer, the fed sealing materials are flush with the wall of the inner chamber and the outer surface of the copper tube of the crystallizer so that the filling materials, the sealing materials and a crystallizer are connected into a whole, and it is achieved that a valving body and the kerf are completely sealed. The compound sealing method for the kerf in the soft contact electromagnetic continuous casting crystallizer is easy to implement, good in sealing performance, good in magnetism permeability, good in formability, low in cost and suitable for industrial production application.

Description

technical field [0001] The invention relates to a processing method of a soft-contact electromagnetic continuous casting crystallizer, in particular to a method for sealing a kerf of a soft-contact electromagnetic continuous casting mold, which is applied in the technical field of metallurgical equipment. Background technique [0002] Soft contact electromagnetic continuous casting technology is a new electromagnetic continuous casting technology. Its principle is to use the electromagnetic force generated by the high-frequency alternating magnetic field in the liquid metal to reduce the contact between the liquid metal and the mold wall, thereby effectively reducing or even eliminating crystallization. The purpose of the vibration mark defect on the surface of the slab caused by the vibration of the machine. [0003] The traditional continuous casting mold is usually composed of a whole copper conductor, but the copper material has a great shielding effect on the high-frequ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/04C23C4/11C23C4/08B22D11/049
CPCC23C24/04C23C4/11C23C4/08B22D11/049
Inventor 雷作胜卢海彪李彬孙晓辉李嘉勋
Owner SHANGHAI UNIV
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