Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

An electric pulse device and method for locally controlling the phase distribution of mold slag in the slag tunnel of a continuous casting mold

A continuous casting mold and mold flux technology is applied in the field of electric pulse devices for locally regulating the phase distribution of mold flux in the slag channel of the continuous casting mold, and achieves the effects of simple equipment, improved casting quality and high adjustment accuracy.

Active Publication Date: 2020-06-30
CENT SOUTH UNIV
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can effectively control the solidification and crystallization behavior of the local mold slag between the mold wall and the billet shell, improve the heat transfer conditions of the slag film, and prevent the slab surface from being damaged due to uneven distribution of the slag film and uneven heat transfer. Quality issues

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • An electric pulse device and method for locally controlling the phase distribution of mold slag in the slag tunnel of a continuous casting mold
  • An electric pulse device and method for locally controlling the phase distribution of mold slag in the slag tunnel of a continuous casting mold

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] use figure 1 The electric pulse device for local control of the mold slag phase distribution in the slag channel of the continuous casting mold is shown to control the local area of ​​excessive heat transfer in the continuous casting of 304 stainless steel. The peak current of the electric pulse is 30A, the output voltage is 24V, and the frequency is . 60Hz, the duty cycle is 0.6, the power-on time is 6min, and the electrode is 11mm away from the inner wall of the crystallizer.

[0060] After observation and sampling inspection, the cracks of the slab in this part are significantly reduced, the average thickness of the slag film is 2.7mm, the distribution is uniform, the crystallization rate is 83%, the grain size becomes larger, and the heat flow in this part is reduced by 95KW / m 2 .

Embodiment 2

[0062] use figure 1 The electrical pulse device for local control of mold slag phase distribution in the slag channel of the continuous casting mold is shown to control the local area of ​​excessive heat transfer in IF steel continuous casting. The peak current of the electric pulse is 120A, the output voltage is 20V, and the frequency is 45Hz, the duty cycle is 0.3, the power-on time is 5min, and the electrode is 8mm away from the inner wall of the crystallizer.

[0063] After observation and sampling inspection, the cracks of the slab in this part are significantly reduced, the average thickness of the slag film is 3.7mm, the distribution is uniform, the crystallization rate is 86%, the grain size becomes larger, and the heat flow in this part decreases by 138KW / m 2 .

Embodiment 3

[0065] use figure 1 The electrical pulse device for locally regulating the phase distribution of mold slag in the slag channel of the continuous casting mold is shown to regulate the local area where the heat transfer is too large in the continuous casting of high manganese steel. The peak current of the electric pulse is 60A, the output voltage is 32V, and the frequency At 30Hz, the duty cycle is 0.4, the electrification time is 8min, and the electrode is 13mm away from the inner wall of the crystallizer.

[0066] After observation and sampling inspection, the cracks of the slab in this part are significantly reduced, the average thickness of the slag film is 3.3mm, the distribution is uniform, the crystallization rate is 90%, the grain size becomes larger, and the heat flow in this part decreases by 146KW / m 2 .

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses an electric pulse device for locally regulating and controlling the phase state distribution of slag in a continuous casting crystallizer slag channel. The electric pulse device comprises a pulse power supply, an oscilloscope and a pair of sheet electrodes, wherein the pair of sheet electrodes are oppositely arranged on the inner side and the outer side of a crystallizer, and the pulse power supply and the oscilloscope are electrically connected with the sheet electrodes. The invention further discloses a method for locally regulating and controlling the phase distribution of the protective slag in the continuous casting crystallizer slag channel by adopting the electric pulse device. According to the electric pulse device, the local crystallization rate of the protective slag can be effectively improved, the heat transfer capacity of the protective slag can be improved, the rheological property of the local protective slag can be regulated and controlled, the uniform distribution of a slag film is facilitated, and therefore the quality of a casting blank is improved.

Description

technical field [0001] The invention belongs to the technical field of continuous casting of iron and steel, and in particular relates to an electric pulse device and method for locally regulating the phase distribution of mold slag in a slag channel of a continuous casting crystallizer. Background technique [0002] Continuous casting mold mold slag is an important functional material in the continuous casting process. It plays a role in heat insulation and heat preservation in the continuous casting mold, preventing liquid surface crusting, isolating air, preventing secondary oxidation of molten steel, improving casting billet lubrication conditions, and controlling heat transfer. And absorb non-metallic inclusions and other important functions, so in the smelting process, the performance of continuous casting mold slag has a great influence on the smooth progress of the continuous casting process and the quality of steel. [0003] In the continuous casting process, the mo...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/18B22D11/111
CPCB22D11/111B22D11/186
Inventor 周乐君王万林潘子航陈俊宇吴厚发
Owner CENT SOUTH UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com