Title:
METHOD FOR CONTROLLING STRUCTURE OF SOLIDIFIED CAST INGOT IN CONTINUOUS CASTING PROCESS AND CONTROL DEVICE THEREOF
Document Type and Number:
WIPO Patent Application WO/2019/184731
Kind Code:
A1
Abstract:
A method for controlling the structure of a solidified cast ingot in a continuous casting process comprises: arranging a high-intensity cooling region (210) and a heating and slow-cooling region (230) in a space between a water drain port of a crystallizer and a solidification end point; performing high-intensity cooling on a continuously cast ingot (100) in the high-intensity cooling region; and then performing heating and slow-cooling on the continuously cast ingot (100) in the heating and slow-cooling region, wherein a cooling intensity of the heating and slow-cooling is less than a cooling intensity of air-based cooling. A device for employing heating and slow-cooling to control the structure of a solidified cast ingot is further disclosed, comprising a high-intensity cooling region and a heating and slow-cooling region arranged in a lengthwise direction of a continuously cast ingot at a lower portion of a continuous casting crystallizer, wherein the high-intensity cooling region is used to spray water to a surface of the cast ingot so as to perform cooling, and the heating and slow-cooling region is used to heat the surface of the cast ingot. In the method and device, a continuously cast ingot is firstly cooled in the high-intensity cooling region, and then undergoes heating and slow-cooling in the heating and slow-cooling region, thereby reducing spacing and gaps among columnar crystals, increasing efficiency of space-filling of near-surface columnar crystals on a cast ingot, and improving quality of the cast ingot.
Inventors:
WU LIPING (CN)
SHEN CHANG (CN)
SUN BIAO (CN)
WANG GUOCAI (CN)
LU QIANG (CN)
SHEN CHANG (CN)
SUN BIAO (CN)
WANG GUOCAI (CN)
LU QIANG (CN)
Application Number:
PCT/CN2019/078326
Publication Date:
October 03, 2019
Filing Date:
March 15, 2019
Export Citation:
Assignee:
MAANSHAN IRON & STEEL CO LTD (CN)
International Classes:
B22D11/124
Foreign References:
| CN108672668A | 2018-10-19 | |||
| CN208374145U | 2019-01-15 | |||
| CN105583383A | 2016-05-18 | |||
| CN104308111A | 2015-01-28 | |||
| CN101412183A | 2009-04-22 | |||
| CN102586683A | 2012-07-18 | |||
| JPS60130457A | 1985-07-11 | |||
| JP2011161476A | 2011-08-25 | |||
| CN101412183A | 2009-04-22 |
Other References:
See also references of EP 3750649A4
Attorney, Agent or Firm:
WEN PARTNERS, P.C. (CN)
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