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Continuous casting slab defect melting equipment and thermal deburring process

A continuous casting slab and burr technology, which is applied in the field of continuous casting slab defect melting equipment and thermal burr removal technology, can solve problems such as harsh working environment, high dust, high temperature, etc., to improve operating efficiency, eliminate quality problems, and save energy. artificial effect

Active Publication Date: 2018-06-08
MCC BAOSTEEL TECH SERVICE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The melting of defects in continuous casting slabs has always been a difficult problem for steel mills. At present, most of them use manual cleaning methods. During the manual cleaning of slabs, natural gas and oxygen are used to clean the surface of slabs with flames, which is high temperature and high risk. Sexual work, harsh working environment and high risk
[0004] Artificial flame cleaning has the following disadvantages: high temperature and high dust on the job site, long-term operation will affect the health of operators; at the same time, the weight of the purge gun and the recoil of high-pressure oxygen, long-term operation is a difficult test for personnel endurance
[0006] However, no matter whether it is manual cleaning or mechanical cleaning, it is impossible to completely prevent secondary defects on the surface of the continuous casting slab - burrs or slag inclusions

Method used

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  • Continuous casting slab defect melting equipment and thermal deburring process
  • Continuous casting slab defect melting equipment and thermal deburring process
  • Continuous casting slab defect melting equipment and thermal deburring process

Examples

Experimental program
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Effect test

Embodiment 1

[0051] This embodiment provides a continuous casting slab defect melting equipment, including a purging unit, see the attached figure 1 As shown, the purging unit includes a flame spray gun 1, and a deburring oxygen blowing pipe 2 is added to the side of the flame spray gun 1, and the burr oxygen blowing pipe 2 has a hole diameter of 8mm. The end of the oxygen blowing pipe 2 is connected with the nozzle 3 . The oxygen blowing pipe 2 adopts an easy-to-bend structure, which is convenient for adjusting the position of the nozzle 3 and adjusting the blowing angle for deburring. In this embodiment, it is made of high-temperature-resistant copper material. Nozzle 3 is a flat nozzle, and the height of nozzle 3 is 1mm (see image 3 ), which facilitates the formation of high-pressure airflow and increases the mechanical impact performance of the gas.

[0052] combined with figure 2 As shown, the oxygen blowing pipe is connected to the burr-blowing oxygen pipeline 4, and the burr-bl...

Embodiment 2

[0055] Referring to Example 1, the burr-blowing oxygen pipeline is connected from the splitter 14 of the equipment, and an independent solenoid valve and a gas meter are set on the burr-blowing oxygen pipeline.

Embodiment 3

[0057] Adopt the thermal state deburring process of the continuous casting slab defect melting equipment of embodiment 1 or 2, comprising,

[0058](1) Preparation, the nozzle 3 of the oxygen blowing pipe 2 is arranged behind the walking direction of the flame spray gun 1, the distance from the flame spray gun nozzle 13 is 150-200mm, and the height is positioned to 15-18mm from the surface of the slab;

[0059] (2) When the equipment is working, when the continuous casting slab defect melting device is purging the surface of the slab, at the starting point of self-purging, the solenoid valve will automatically open the oxygen blowing pipe, and set the low pressure of 0.5-0.7Mpa into the oxygen blowing pipe Oxygen, the purging unit moves at a speed of 7-9M / min;

[0060] (3) After the purge unit reaches the end point of slab purge, control the flame spray gun to turn off, and the oxygen blowing pipe continues to blow oxygen, and the purge unit returns to the starting point at a w...

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Abstract

The invention provides a continuous casting slab defect melting removing device which comprises a purging unit. The purging unit comprises a flame spray gun. A burr removing oxygen lance is added to the side edge of the flame spray gun. The tail end of the oxygen lance is connected with a nozzle, and the oxygen lance is connected with an oxygen supply pipeline. The invention further provides a thermal state burr removing technology. Low-pressure oxygen purging is conducted towards a slab behind the walking route of the flame spray gun in a following manner while the flame spray gun of the continuous casting slab defect melting removing device conducts purging. According to the technical scheme, generated burrs can be rapidly removed while defect melting removing is conducted on the slab, and the quality problem caused by the slab burrs is solved.

Description

technical field [0001] The invention belongs to the field of metal processing, and relates to a defect treatment process for continuous casting slabs, in particular to a continuous casting slab defect melting device and a thermal deburring process. Background technique [0002] Defects in the surface layer of continuous casting slabs include slag inclusions, cracks, etc. The conventional measure is to clean the surface by flame, that is, to melt the surface by flame. [0003] The melting of defects in continuous casting slabs has always been a difficult problem for steel mills. At present, most of them use manual cleaning methods. During the manual cleaning of slabs, natural gas and oxygen are used to clean the surface of slabs with flames, which is high temperature and high risk. Sexual work, harsh working environment and high risk. [0004] Artificial flame cleaning has the following disadvantages: high temperature and high dust on the job site, long-term operation will a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/12
CPCB22D11/1213
Inventor 陆永刚李洋郑仕兵
Owner MCC BAOSTEEL TECH SERVICE
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