Study on the effect of multi area controllable electromagnetic braking on behavior of non-uniform molten steel flow and steel-slag interface in the mold

XU Lin; PEI Qunwu; LI Nan; LIU Cong; XU Heyuan

doi:10.7513/j.issn.1004-7638.2025.01.017

Volume 46 Issue 1

Feb. 2025

Turn off MathJax

Article Contents

Article Navigation > IRON STEEL VANADIUM TITANIUM > 2025 > 46(1): 112-123

XU Lin, PEI Qunwu, LI Nan, LIU Cong, XU Heyuan. Study on the effect of multi area controllable electromagnetic braking on behavior of non-uniform molten steel flow and steel-slag interface in the mold[J]. IRON STEEL VANADIUM TITANIUM, 2025, 46(1): 112-123. doi: 10.7513/j.issn.1004-7638.2025.01.017

Citation:

XU Lin, PEI Qunwu, LI Nan, LIU Cong, XU Heyuan. Study on the effect of multi area controllable electromagnetic braking on behavior of non-uniform molten steel flow and steel-slag interface in the mold[J]. IRON STEEL VANADIUM TITANIUM, 2025, 46(1): 112-123. doi: 10.7513/j.issn.1004-7638.2025.01.017

Citation:

XU Lin, PEI Qunwu, LI Nan, LIU Cong, XU Heyuan. Study on the effect of multi area controllable electromagnetic braking on behavior of non-uniform molten steel flow and steel-slag interface in the mold[J]. IRON STEEL VANADIUM TITANIUM, 2025, 46(1): 112-123. doi: 10.7513/j.issn.1004-7638.2025.01.017

PDF( 4367 KB)

Study on the effect of multi area controllable electromagnetic braking on behavior of non-uniform molten steel flow and steel-slag interface in the mold

doi: 10.7513/j.issn.1004-7638.2025.01.017

XU Lin^{1
,
,},
PEI Qunwu²,
LI Nan¹,
LIU Cong¹,
XU Heyuan¹

1.
Shenyang Institute of Engineering, School of Energy and Power Engineering, Shenyang 110136, Liaoning, China
2.
Shenyang Academy of Instrumentation Science Co., Ltd., Shenyang 110043, Liaoning, China

Received Date: 2024-08-06
Publish Date: 2025-02-27

Abstract

Abstract

In the process of continuous casting, the distortion of molten steel flow in mold caused by nozzle clogging is a key factor affecting the quality and production efficiency of castings. To solve this problem, a multi area controllable electromagnetic braking (MAC-EMBr) technology is proposed to improve flow state of molten steel and reduce negative impact of nozzle clogging. Firstly, a slab mold is selected as the research object to establish an analytical model of molten steel flow and steel-slag interface behavior in electromagnetic continuous casting mold. Secondly, the fluid-flow-related phenomena of three casting cases in the slab mold, i.e., No-EMBr, Ruler-EMBr, and MAC-EMBr, are further investigated numerically to evaluate the metallurgical capability of the MAC-EMBr, including the non-uniform flow characteristics of molten steel and the evolution pattern of steel-slag interface inside the mold. According to the simulation results, with a 25% blockage rate of a single-side nozzle, the braking effect of the Ruler-EMBr on the backflow in the upper region of the mold is not remarkably. In detail, when the magnetic flux density reaches 0.3 T, the maximum magnitude of the surface velocity and the maximum amplitude of the level fluctuation on non-clogging side with the Ruler-EMBr are 16.7% and 1.6% higher than those with No-EMBr, respectively. This is not conducive to the stability of steel-slag interface in the mold. However, under the same magnetic flux density as the Ruler-EMBr, the application of MAC-EMBr has great potential to suppress the upward backflow on the non-clogging side. In comparison with No-EMBr, the maximum magnitude of the surface velocity and the maximum amplitude of the level fluctuation with the MAC-EMBr are decreased by 16.7% and 48.4%, respectively. As a result, the flow of molten steel in the mold can be well controlled in different regions with the MAC-EMBr, so as to improve the symmetry of the flow field and reduce the flow asymmetry caused by nozzle clogging.
- continuous casting,
- nozzle clogging,
- electromagnetic braking,
- molten steel flow,
- steel-slag interface

FullText(HTML)

References(18)

References

[1]	BAO Y, LI Z, ZHANG L, et al. Asymmetric flow control in a slab mold through a new type of electromagnetic field arrangement[J]. Processes, 2021,9(11):1988-2000. doi: 10.3390/pr9111988
[2]	WANG T, LI K, LI S, et al. Asymmetric flow behavior of molten steel in thin slab continuous casting mold[J]. Metall. Mater. Trans. B, 2023,54(3):3542-3553.
[3]	WANG Z, LIU J, CUI H, et al. Effect of SEN asymmetric clogging on mold level fluctuation and mold slag distribution during continuous casting[J]. Metall. Mater. Trans. B, 2024,55(4):2932-2947. doi: 10.1007/s11663-024-03156-5
[4]	REN Z M, LEI Z S, LI C J, et al. New study and development on electromagnetic field technology in metallurgical processes[J]. Acta Metallurgica Sinica, 2020,56(4):583-600. (任忠鸣, 雷作胜, 李传军, 等. 电磁冶金技术研究新进展[J]. 金属学报, 2020,56(4):583-600. REN Z M, LEI Z S, LI C J, et al. New study and development on electromagnetic field technology in metallurgical processes[J]. Acta Metallurgica Sinica, 2020, 56（4）: 583-600.
[5]	ZHU M Y. Some considerations for new generation of high-efficiency continuous casting technology development[J]. Iron and steel, 2019,54(8):21-36. (朱苗勇. 新一代高效连铸技术发展思考[J]. 钢铁, 2019,54(8):21-36. ZHU M Y. Some considerations for new generation of high-efficiency continuous casting technology development[J]. Iron and steel, 2019, 54（8）: 21-36.
[6]	LUO S, YANG Y W, WANG W L, et al. Development of electromagnetic flow control technology for high speed casting mold[J]. Journal of Materials and Metallurgy, 2023,22(1):1-22. (罗森, 杨宇威, 王卫领, 等. 高拉速连铸结晶器电磁控流技术发展[J]. 材料与冶金学报, 2023,22(1):1-22. LUO S, YANG Y W, WANG W L, et al. Development of electromagnetic flow control technology for high speed casting mold[J]. Journal of Materials and Metallurgy, 2023, 22（1）: 1-22.
[7]	XU L, PEI Q W, LI YANG, et al. Investigation of multiphase transport behaviors in a FTSR mold during electromagnetic continuous casting process[J]. Iron Steel Vanadium Titanium, 2023,44(4):125-134. (许琳, 裴群武, 李阳, 等. 电磁连铸过程FTSR结晶器多相传输行为的研究[J]. 钢铁钒钛, 2023,44(4):125-134. XU L, PEI Q W, LI YANG, et al. Investigation of multiphase transport behaviors in a FTSR mold during electromagnetic continuous casting process[J]. Iron Steel Vanadium Titanium, 2023, 44（4）: 125-134.
[8]	SCHURMANN D, GLAVINIC´ I, WILLERS B, et al. Impact of the electromagnetic brake position on the flow structure in a slab continuous casting mold: An experimental parameter study[J]. Metall. Mater. Trans. B, 2020,51(1):61-78. doi: 10.1007/s11663-019-01721-x
[9]	XU L, PEI Q W, LI N, et al. Investigation of flow and heat transfer characteristics in CSP mold with electromagnetic braking[J]. Journal of Thermal Science and Technology, 2024,23(1):15-23. (许琳, 裴群武, 李楠, 等. 电磁制动下CSP结晶器内流动与传热特性研究[J]. 热科学与技术, 2024,23(1):15-23. XU L, PEI Q W, LI N, et al. Investigation of flow and heat transfer characteristics in CSP mold with electromagnetic braking[J]. Journal of Thermal Science and Technology, 2024, 23（1）: 15-23.
[10]	SARKAR S, SINGH V, AJMANI S K, et al. Effect of double ruler magnetic field in controlling meniscus flow and turbulence intensity distribution in continuous slab casting mold[J]. ISIJ Int., 2016,56(12):2181-2190. doi: 10.2355/isijinternational.ISIJINT-2016-313
[11]	THOMAS B G, SINGH R, VANKA S P, et al. Effect of single-ruler electromagnetic braking (EMBr) location on transient flow in continuous casting[J]. Journal for Manufacturing Science & Production, 2015,15(1):93-104.
[12]	XU L, PEI Q, HAN Z, et al. Influences of the braking effect of ruler EMBr on molten steel flow and steel–slag interface fluctuation in a continuous casting mold[J]. Processes, 2023,11(1):33-49.
[13]	VAKHRUSHEV A, KARIMI-SIBAKI E, BOHACEK J, et al. Impact of submerged entry nozzle (SEN) immersion depth on meniscus flow in continuous casting mold under electromagnetic brake (EMBr)[J]. Metals, 2023,13(3):444-464. doi: 10.3390/met13030444
[14]	LI Z, ZHANG L T, MA D Z, et al. A narrative review: the electromagnetic field arrangement and the “braking” effect of electromagnetic brake (EMBr) technique in slab continuous casting[J]. Metall. Res. Technol., 2021,118(2):218-234. doi: 10.1051/metal/2021016
[15]	XU L, WANG E, KARCHER C, et al. Numerical simulation of the effects of horizontal and vertical EMBr on jet flow and mold level fluctuation in continuous casting[J]. Metall. Mater. Trans. B, 2018,49(5):2779-2793. doi: 10.1007/s11663-018-1342-4
[16]	LI Z, WANG E, ZHANG L, et al. Influence of vertical electromagnetic brake on the steel slag interface behavior in a slab mold[J]. Metall. Mater. Trans. B, 2017,48(4):2389-2402.
[17]	XU L, KARCHER C, WANG E. Numerical simulation of melt flow, heat transfer and solidification in CSP continuous casting mold with vertical-combined electromagnetic braking[J]. Metall. Mater. Trans. B, 2023,54(4):1646-1664. doi: 10.1007/s11663-023-02784-7
[18]	XU L, HAN Z, KARCHER C, et al. Melt flow, heat transfer and solidification in a flexible thin slab continuous casting mold with vertical-combined electromagnetic braking[J]. J. Iron Steel Res. Int., 2024,31(2):401-415. doi: 10.1007/s42243-023-01062-9