Metallurgical Behavior of Adjusted Converter Slag in Reduction Process

Abstract:

The metallurgical behavior of adjusted converter slag components during the selective reduction process were investigated by thermodynamic calculating with different modified slag composition, addition of reducing agent and reduction temperature. The activities of main slag components were drawn from the calculated values. The results showed that the activity of SiO₂ increased with increment of its mass fraction in slag. The solubility of SiO₂ increased with increment of temperature. The selective reduction was promoted by selecting the appropriate amount of modifier. Reduction order was elucidated in this paper, Fe was reduced from the slag followed by P, Mn and Si and the reduction rate of Si could reach about 51%. The metal phase was rich in Fe, Si, Mn and P as a result of the selective reduction.

• Periodical: Advanced Materials Research (Volumes 299-300)
• Pages: 310-313
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.299-300.310
• Online since: July 2011
• Authors: Min Chen, Zhen Tian, Qing Xian Yu, Zhen Feng Gao
• Keywords: Activity, Converter Slag, Fe-Si-Mn Alloy, Melting Adjustment, Selective Reduction

References

[1] J.S. Leng, F.L. Sun and J. Zhou: Ferro-alloy Vol. 6 (2008), p.10.

[2] T. Takagawa, S. Ueda: ISIJ International Vol. 49 (2009), p.1673.

[3] C.S. Jiang, Q.J. Ding and F.Z. Wang: Science and Technology of overseas building materials 23 (2002), P. 4.

[4] R. Sripriya*, Ch.V.G.K. Murty: International Journal of Mineral Processing 75 (2005), p.123.

[5] G.Z. Ye: Scandinavian Journal of Metallurgy 32 (2003), p.7.

[6] J.S. Wu, L. Li: Journal of East China University of Metallurgy Vol. 17 (2000), p.300.

[7] Zhang Jian: Calculating Thermodynamics of Metallurgical Melts. Beijing: Metallurgical Industry Press, (1998).

[8] Ziqing Zhang, Jiyuan Zhou, Xiyuan Zou and Yanwen Tian: Acta Matellurgica sinaca Vol. 22(1986), p.256.

[9] Yuanxi Zou: Thermodynamics of liquid blast furnace slag Vol. 22 (1956), p.127.