The Role of Mold Electromagnetic Stirring in the Dissipation of Superheat during the Continuous Casting of Billets
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In: Steel research international, Vol. 93.2022, No. 10, 2200065, 29.06.2022.
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TY - JOUR
T1 - The Role of Mold Electromagnetic Stirring in the Dissipation of Superheat during the Continuous Casting of Billets
AU - Zhang, Zhao
AU - Wu, Menghuai
AU - Zhang, Haijie
AU - Ludwig, Andreas
AU - Kharicha, Abdellah
N1 - Publisher Copyright: © 2022 The Authors. Steel Research International published by Wiley-VCH GmbH.
PY - 2022/6/29
Y1 - 2022/6/29
N2 - A two-phase solidification model coupling mold electromagnetic stirring (M-EMS) is used to investigate the initial solidification in the mold region of billet continuous casting. One novelty of this numerical study is to quantify how the M-EMS induces primary and secondary flows, interacting with the jet flows coming from the submerged entry nozzle, and how those flows further influence the dissipation of superheat and the initial solidification. The role of the M-EMS in speeding up the superheat dissipation in the mold region, known from previous studies and casting practices, is quantitatively verified. Additionally, some new knowledge regarding the M-EMS is found. The total heat transfer rate from the strand surface to the water-cooled copper mold is not affected by the M-EMS; with the M-EMS, the superheat effect on the solid growth can only be detected in the out-of-the-mold region, while the shell growth inside the mold region is quite independent of the superheat; a strong M-EMS tends to accelerate the growth of the solid shell in the mold region, but delays its growth in the secondary cooling zones. The aforementioned new findings may only be valid for the case of the current billet casting, to be confirmed for other casting formats/parameters.
AB - A two-phase solidification model coupling mold electromagnetic stirring (M-EMS) is used to investigate the initial solidification in the mold region of billet continuous casting. One novelty of this numerical study is to quantify how the M-EMS induces primary and secondary flows, interacting with the jet flows coming from the submerged entry nozzle, and how those flows further influence the dissipation of superheat and the initial solidification. The role of the M-EMS in speeding up the superheat dissipation in the mold region, known from previous studies and casting practices, is quantitatively verified. Additionally, some new knowledge regarding the M-EMS is found. The total heat transfer rate from the strand surface to the water-cooled copper mold is not affected by the M-EMS; with the M-EMS, the superheat effect on the solid growth can only be detected in the out-of-the-mold region, while the shell growth inside the mold region is quite independent of the superheat; a strong M-EMS tends to accelerate the growth of the solid shell in the mold region, but delays its growth in the secondary cooling zones. The aforementioned new findings may only be valid for the case of the current billet casting, to be confirmed for other casting formats/parameters.
KW - continuous casting
KW - electromagnetic stirring
KW - solid shell growth
KW - superheat dissipation
UR - http://www.scopus.com/inward/record.url?scp=85133610118&partnerID=8YFLogxK
U2 - 10.1002/srin.202200065
DO - 10.1002/srin.202200065
M3 - Article
AN - SCOPUS:85133610118
VL - 93.2022
JO - Steel research international
JF - Steel research international
SN - 1611-3683
IS - 10
M1 - 2200065
ER -
