电磁旋流水口对圆坯结晶器液面波动的控制

doi:10.13228/j.boyuan.issn1005-4006.20210048

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Abstract In the continuous casting production of round bloom, vigorous mold electromagnetic stirring (M-EMS) could cause violent liquid level fluctuation in the mold, which affects the surface and internal quality in the bloom. An electromagnetic swirling flow in the nozzle (EMSFN) was applied together with the mold electromagnetic stirrer during the continuous casting. The secondary flow induced by M-EMS was weakened by adjusting the stirring direction and the current intensity of the EMSFN device, so that the liquid level fluctuation in the mold could be controlled within a small range. The results show that when the stirring direction of EMSFN device is opposite and the current intensity is 400 A, the fluctuation proportion more than ±2 mm is decreased from 0.62% to 0.13%, and the fluctuation proportion within ±1 mm to ±2 mm is decreased from 5.90% to 3.56%, compared with the results by using only M-EMS in the same strand. When the stirring direction of EMSFN device is the same, the control effect on the liquid level fluctuation more than ±2 mm is not good. Therefore, the liquid level fluctuation can be controlled by the opposite nozzle swirling flow at certain stirring magnitude.

Key words： continuous casting liquid level fluctuation mold electromagnetic stirring electromagnetic swirling flow submerged entry nozzle

Received: 14 April 2020

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	Articles by authors
	SHI Hong-yan
	WU Chun-lei
	LIU Li
	TIAN Sheng-lin
	LIU Xiao-ming
	WANG Qiang

Cite this article:

SHI Hong-yan,WU Chun-lei,LIU Li等. Liquid level fluctuation in mold controlled by electromagnetic nozzle swirling flow in continuous casting of round bloom[J]. CONTINUOUS CASTING, 2021, 40(6): 24-28.

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http://www.chinamet.cn/Jweb_lz/EN/10.13228/j.boyuan.issn1005-4006.20210048 OR http://www.chinamet.cn/Jweb_lz/EN/Y2021/V40/I6/24

[1]	姜丽梅,王亮亮.高磷IF钢结晶器液面波动原因分析与控制[J].连铸,2018(1):8.
[2]	刘进步,张新文,张庆武.圆坯表面网状裂纹产生原因与控制[J].连铸,2016 (2):66.
[3]	张磊,翟冰钰,王万林.薄板坯连铸及其铸坯表面缺陷的形成机理[J]. 连铸,2020(2):22.
[4]	李康康,张彩军,肖鹏程,等.高拉速薄板坯连铸结晶器钢渣界面波动分析[J]. 连铸,2021(1):9.
[5]	刘增勋, 张朝阳, 肖鹏程, 等. 冷却工艺对高速连铸结晶器传热的影响[J]. 钢铁, 2021, 56(5): 41.
[6]	胡群, 张硕, 王璞, 等. 大方坯结晶器内液面波动与卷渣行为[J]. 中国冶金, 2020, 30(6): 63.
[7]	王伟, 朱立光, 张彩军, 等. 180 mm×610 mm板坯连铸结晶器内流场水模型及数值模拟[J]. 中国冶金, 2020, 30(2): 46.
[8]	康吉柏, 王卫领, 罗腾飞, 等. 20CrMnTi钢160 mm×160 mm 方坯内部质量控制[J]. 钢铁, 2021, 56(2): 82.
[9]	Vivis C. Elaboration of metal matrix composites from thixotropic alloy slurries using a new magnetohydrodynamic caster[J]. Metallurgical and Materials Transactions B, 1993, 24: 493.
[10]	Chang F C, Hull J R, Beitelman L. Simulation of flow control in the meniscus of a continuous casting mold with opposing alternating current magnetic fields[J]. Metallurgical and Materials Transactions B, 2004, 35: 1129.
[11]	Eckert S, Nikrityuk P A, Rabiger D, et al. Efficient melt stirring using pulse sequences of a rotating magnetic field: Part I. flow field in a liquid metal column[J]. Metallurgical and Materials Transactions B, 2007, 38: 977.
[12]	Willers B, Eckert S, Michel U, et al. The columnar-to-equiaxed transition in Pb-Sn alloys affected by electromagnetically driven convection[J]. Materials Science Engineering A, 2005, 402: 55.
[13]	朱苗勇. 高拉速连铸过程传输行为特征及关键技术探析[J]. 钢铁, 2021, 56(7): 1.
[14]	牛亮, 赵俊学, 仇圣桃,等. 偏心M-EMS作用下连铸圆坯流动-传热模拟[J]. 钢铁, 2020, 55(9): 49.
[15]	马建民. 80号钢连铸坯末端电磁搅拌优化与实践[J]. 中国冶金, 2021, 31(2): 72.
[16]	周滨新, 张康晖, 马建超, 等. 70钢小方坯芯部质量优化[J]. 中国冶金, 2021, 31(1): 42.
[17]	王强,何明,朱晓伟,等.电磁场技术在冶金领域应用的数值模拟研究进展[J].金属学报,2018,54(2):228.
[18]	LI D W, SU Z J, CHEN J, et al. Effects of electromagnetic swirling flow in submerged entry nozzle on square billet continuous casting of steel process[J]. ISIJ International, 2013, 53(7): 1187.
[19]	李德伟,苏志坚,陈进,等.钢圆坯连铸过程中渐开式电磁旋流水口数值模拟[J].金属学报,2013,49(7):871.
[20]	吴春雷,李德伟,朱晓伟,等.电磁旋流水口连铸技术对小方坯凝固组织和宏观偏析的影响[J].金属学报,2019,55(7):875.
[21]	WU C, LI D, ZHU X, et al. Experimental study of macrostructure and segregation by a novel electromagnetic nozzle swirling flow combined with electromagnetic stirring in continuous casting. Metallurgical and Materials Transactions B, 2021, 52(3): 1207.