Influence Factors Analysis of Fe-C Alloy Blocking Layer in the Electromagnetic Induction-Controlled Automated Steel Teeming Technology

doi:10.1007/s40195-019-00957-5

Abstract

Abstract:

In the electromagnetic induction-controlled automated steel teeming (EICAST) technology of ladle, the height and location of the blocking layer are critical factors to determine the structure size and installation location of induction coil. And, they are also the key parameters affecting the successful implementation of this new technology. In this paper, the influence of the liquid steel temperature, the holding time and the alloy composition on the height and location of the blocking layer were studied by numerical simulation. The simulation results were verified by 40 t ladle industrial experiments. Moreover, the regulation approach of the blocking layer was determined, and the determination process of coil size and its installation location were also analyzed. The results show that the location of the blocking layer moves down with the increase in the liquid steel temperature and the holding time. The height of the blocking layer decreases with the increase in the liquid steel temperature; however, it increases with the increase in the holding time. The height and location of the blocking layer can be largely adjusted by changing the alloy composition of filling particles in the upper nozzle. When the liquid steel temperature is 1550 °C, the holding time is 180 min and the alloy composition is confirmed, the melting layer height is 120 mm, and the blocking layer height is 129 mm, which are beneficial to design and installation of induction coil. These results are very important for the industrial implementation of the EICAST technology.

Key words: Electromagnetic induction-controlled automated steel teeming (EICAST), Blocking layer, Liquid steel temperature, Holding time, Alloy composition

Ming He, Xian-Liang Li, Qing-Wei Wang, Qiang Wang, Zhi-Yuan Liu, Chong-Jun Wang. Influence Factors Analysis of Fe-C Alloy Blocking Layer in the Electromagnetic Induction-Controlled Automated Steel Teeming Technology[J]. Acta Metallurgica Sinica (English Letters), 2020, 33(5): 671-678.

Figures/Tables 11

Fig. 1 Numerical model: a model, b main sizes (unit: mm)

Table 1 Composition of Fe-C alloy particles (%)

Fig. 2 Temperature condition of the top surface of the Fe-C alloy particles and the refractory brick

Fig. 3 Installation locations of thermocouples in the refractory brick (unit: mm)

Fig. 4 Comparison and analysis of numerical results and experimental results

Fig. 5 Heights and locations of blocking layer at different liquid steel temperatures: a heights, b locations

Fig. 6 Heights and locations of the blocking layer at different holding times: a heights, b locations

Fig. 7 Heights and locations of the blocking layer at different liquid steel temperatures and different holding time

Fig. 8 Heights and locations of the blocking layer at different alloy compositions

Fig. 9 Height and location of the blocking layer in a 40 t ladle with the EICAST system

Fig. 10 Determination process of coil length and its installation location

References 24

[1]	H.J. Lee, B.G. Thomas, S.H. Kim , Metall. Mater. Trans. B 47, 1453 (2016)
[2]	P.K. Singh, D. Mazumdar , Metall. Mater. Trans. B 49, 1945 ( 2018)
[3]	L.G. Yu, J.J. Wang , Shandong Metall. 33, 14 (2011)
[4]	D.J. Li, X.A. Liu, Q. Wang, J.C. He, J. Northeast. Univ. 33, 661 (2012)
[5]	D.J. Li, X.A. Liu, Q. Wang, R.H. Ouyang, H.S. Chai, J.C. He , J. Iron Steel Res. 24, 16 (2012)
[6]	Z.Y. Deng, B. Glaser, M.A. Bombeck, D. Sichen , Steel Res. Int. 87, 921 (2016)
[7]	A. Gao, Q. Wang, D.J. Li, B.G. Jin, K. Wang, J.C. He , Acta Metall. Sin. 46, 634 (2010). (in Chinese)
[8]	Z.Y. Deng, B. Glaser, M.A. Bombeck, D. Sichen , Steel Res. Int. 87, 484 (2016)
[9]	T.G. Wang, Z.H. Li, J. Hazard. Mater. B112, 63 (2004)
[10]	A. Gao, D.J. Li, Q. Wang, K. Wang, B.G. Jin, K. Marukawa, J.C. He , ISIJ Int. 50, 1770 (2009)
[11]	A. Gao, Q. Wang, B.G. Jin, J.C. He, J. Northeast. Univ. 31, 515 (2010)
[12]	D.J. Li, Q. Wang, X.A. Liu, A. Gao, X.B. Wang, J. Dong, K. Marukawa, J.C. He , J. Iron Steel Res. Int. 19, 766 (2012)
[13]	M. He, X.L. Li, Z.Q. Cao, S.L. Dong, T. Liu, Q. Wang , Vacuum 146, 130 (2017)
[14]	Q. Wang, D.J. Li, X.A. Liu, X.B. Wang, J. Dong, J.C. He , J. Iron Steel Res. Int. 22, 30 (2015)
[15]	Q. Wang, M. He, X.W. Zhu, X.L. Li, C.L. Wu, S.L. Dong, T. Liu , Acta Metall. Sin. 54, 228 (2018). (in Chinese)
[16]	X.A. Liu, Q. Wang, D.J. Li, G.L. Li, D.Q. Geng, A. Gao, J.C. He , ISIJ Int. 54, 482 (2014)
[17]	C.Y. Shi, J.C. He , Mater. Trans. 59, 39 (2018)
[18]	M. He, X.L. Li, X.A. Liu, X.W. Zhu, T. Liu, Q. Wang , Acta Metall. Sin. (Engl. Lett.) 32, 391 (2019)
[19]	W.H. Tong, F.M. Shen, H. Shibata, W.Z. Wang, Y.S. Yang, Y. Waseda, R. Takahashi, J.I. Yagi , Acta Metall. Sin. 38, 983 (2002). (in Chinese)
[20]	S.M. Yang, W.Q. Tao , Heat Transfer (Higher Education Press, Beijing, 2006), p. 555. (in Chinese)
[21]	Z.B. Fu , Induction Heating and Energy Conservation (China Machine Press, Beijing, 2008), p. 28. (in Chinese)
[22]	E. Abbasi, Q.S. Luo, D. Owens , Acta Metall. Sin. (Engl. Lett.) 32, 74 (2019)
[23]	W.B. Gao, D.P. Wang, F.J. Cheng, C.Y. Deng, W. Xu , Acta Metall. Sin. (Engl. Lett.) 28, 1097 (2015)
[24]	A. Gao, Q. Wang, D.J. Li, H.S. Chai, L.J. Zhao, J.C. He , Acta Metall. Sin. 47, 219 (2011). (in Chinese)