Optimization of Calcium Addition to High-strength Low-alloy Steels

GUJUN -Chen

PDF(2156 KB)

Journal of Iron and Steel Research International ›› 2015, Vol. 22 ›› Issue (7) : 590-597.

Metallurgy and Metal Working

Optimization of Calcium Addition to High-strength Low-alloy Steels

GUJUN -Chen

Author information +

History +

Abstract

Nozzle blockage is a common problem during continuous casting of Al-killed steel, and calcium treatment is widely used to resolve it. In consideration of the production costs, the technology of nonmetallic inclusion control was studied to optimize the Ca consumption. The proposed process of slag washing was employed, and the refining slag composition, deoxidation conditions and alloying systems were optimized. Using these measures, the steel cleanliness before Ca addition was improved significantly, and the corresponding Ca consumption was reduced. Moreover, the continuous casting could be conducted smoothly.

Key words

Ca addition / nozzle clogging / slag washing / steel cleanliness / Ca-aluminates

Cite this article

EndNote

Ris (Procite)

Bibtex

Download Citations

GUJUN -Chen. Optimization of Calcium Addition to High-strength Low-alloy Steels[J]. Journal of Iron and Steel Research International, 2015, 22(7): 590-597

References

[1] J. H. Park and H. Todoroki. Control of MgO-Al2O3 Spinel Inclusions in Stainless Steels[J]. ISIJ Int., 2010, 50(10), 1333.
[2] N. Verma, P. C. Pistorius, R. J. Fruehan, M. Potter, M. Lind and S. Story. Transient Inclusion Evolution During Modification of Alumina Inclusions by Calcium in Liquid Steel: Part I. Background,Experimental Techniques and Analysis Methods[J]. Metall. Mater. Trans. B, 2011,42(4), 711.
[3] M. Lind and L. Holappa. Transformation of Alumina Inclusions by Calcium Treatment[J]. Metall. Mater. Trans. B, 2010, 41(2), 359.
[4] S. K. Choudhary and A. Ghosh. Mathematical Model for Prediction of Composition of Inclusions Formed during Solidification of Liquid Steel[J]. ISIJ Int., 2009, 49(12), 1819.
[5] S. K. Dhua. Optimisation of Inclusion Chemistry by Improved Steel Cleanliness and Optimum Calcium Treatment[J]. Steel Res. Int., 2007, 78(2), 136.
[6] J. M. A. Geldenhuis and P. C. Pistorius. Minimisation of calcium additions to low carbon steel grades[J]. Ironmaking Steelmaking, 2000, 27(6), 442.
[7] L. H. Mh, M. Liukkonen and M. Lind. Thermodynamic Examination of Inclusion Modification and Precipitation from Calcium Treatment to Solidified Steel[J]. Ironmaking and Steelmaking, 2003, 30(2), 111.
[8] E. T. Turkdogan, R. S. Bogan and S Gilbert. Proc. 74th Steelmaking Conf. Washington D. C, USA, 1991, ISS-AIME, 423.
[9] S. Maeda, T. Soejima, T. Saito, H. Matsumoto, H. Fujimoto and T. Mimura: Proc.72th Steelmaking Conf., Chicago, USA, 1989, ISS-AIME, 379.
[10] H. Suito and R. Inoue: Thermodynamics on Control of Inclusions Composition in Ultraclean Steels[J]. ISIJ Int., 1996, 36(5), 528.
[11] X. H. Huang. Ferrous Metallurgical Principle[C]. Metallurgical Industry Press, Beijing, China, 2008, 111.
[12] B. H. Yoon, K. H. Heo, J. S. Kim and H. S. Sohn: Improvement of Steel Cleanliness by Controlling Slag Composition[J]. Ironmaking and Steelmaking, 2002, 29(3), 215.
[13] M. Valdez, G. S. Shannon and S. Sridhar. The Ability of Slags to Absorb Solid Oxide Inclusions[J]. ISIJ Int., 2006, 46(3), 450.
[14] Guangwei Yang, Xinhua Wang, Fuxiang Huang, Wanjun Wang, Yuqun Yin and Chunxia Tang. Influence of Reoxidation in Tundish on Inclusion for Ca-Treated Al-Killed Steel[J]. Steel Res. Int., 2013, DOI: 10.1002/srin.201300243.
[15] S. A. Gm, I. E. Mahallawi and H. Ahmed. Control of Ca Addition for Improved Cleanness of Low C, Al Killed Steel[J]. Ironmaking and Steelmaking, 2009, 36(6), 432.
[16] Y. Wang, M. Valdez and S. Sridhar. Formation of CaS on Al2O3-CaO Inclusions during Solidification of Steels[J]. Metall. Mater. Trans. B, 2002, 33(4), 625.