Effect of SEN immersion depth on mold flow profile and slag entrapment during continuous casting of steel

  • Mallikarjuna Rao P JSW Steel Limited, Vijayanagar Works, Toranagallu, Bellary, Karnataka, India.
  • Vaibhav Vasantrao Chougale College of Engineering, Shivajinagar, Pune, Maharashtra, India.
  • Satish Kumar D JSW Steel Limited, Vijayanagar Works, Toranagallu, Bellary, Karnataka, India.
  • Rajendra T JSW Steel Limited, Vijayanagar Works, Toranagallu, Bellary, Karnataka, India
  • Balachandran G JSW Steel Limited, Vijayanagar Works, Toranagallu, Bellary, Karnataka, India
Keywords: Mold slag entrapment, SEN immersion depth, Casting speed, Mold flow profile, Water modeling, Nail board

Abstract

Mold flux entrapment during continuous casting of steel contributes to both surface and sub-surface defects in the final product. Continuous casting operating parameters such as casting speed, SEN immersion depth, SEN port geometry, argon flow, and mold EMS significantly affect the mold flow conditions and flow profile. During continuous casting operation, SEN immersion depth is continuously varied to avoid localized erosion of SEN, and it impacts the flow dynamics in the mold. In the present work, water modeling studies were carried out for a wide range of mold widths (1200-1800 mm) and casting speeds (0.8-1.4 m/min) on a 0.5 scaled down water model to optimize casting speed for different combinations of SEN immersion depth and mold width. Results from water modeling were further validated using nail board studies in the actual plant. A safe operating matrix was identified from these experiments to avoid mold slag entrapment during continuous casting.

References

F. Peng, Y. Min, C.J. Liu, M.F. Jiang: Int. J. Minerals, Metallurgy and Materials, 26 (2019) 186-193.

https://doi.org/10.1007/s12613-019-1723-y

C.L. Hibbeler, G.B. Thomas: AISTech Proceedings, (2013) 1215-1230.

Dipak Mazumdar, I.L.G. Roderick: ISIJ Int., 39 (1999) 524-547.

https://doi.org/10.2355/isijinternational.39.524

L. Zhang, B.G. Thomas: XXIV National Steelmaking Symposium, Morelia, Mexico, 26-28, Nov 2003, 138-183.

X. Deng, C. Ji, Y. Cui, L. Li, X. Yin, Y. Yang, A. McLean: Iron Making and Steel Making, 44 (2017) 461-471.

https://doi.org/10.1080/03019233.2016.1215666

B. Rietow, B.G. Thomas: May 5-8, AISTech 2008, Pittsburgh, PA.

R. Liu, B.G. Thomas, S. Joydeep, D.C. Stephen, M. Trinh: ISIJ Int., 54 (2014) 2314-2323.

https://doi.org/10.2355/isijinternational.54.2314

Z. Peng, Z. Lanhua: Iron Making and Steel Making, 46 (2019) 886-895.

https://doi.org/10.1080/03019233.2019.1604613

X. Li, B. Li, Z. Liu, R. Niu, Y. Liu, C. Zhao, C. Huang, H. Qiao, T. Yuan: Metals, MDPI, 9 (2019) 7-19.

https://doi.org/10.3390/met9010007

F. Wang, Y. Wang, S. Yang, W. Zhang, J. Li, X. Zhang: Contributed papers from Materials Science and Technology, MS&T 2017, October, 2017, Pittsburgh, Pennsylvania USA.

Q. Lu, R. Yang, X. Wang, J. Zhang, W. Wang: J. University of Science and Technology Beijing, 14 (2007) 399-404.

https://doi.org/10.1016/S1005-8850(07)60079-6

Published
2021-10-05
Section
Steelmaking and processing - devoted to Prof. Ljubomir Nedeljković