Abstract:In order to improve the desulfurization efficiency of the gas-stirred ladle,a computation fluid dynamics-simultaneous reaction model (CFD-SRM) coupled model was proposed to describe the desulfurization behavior in a gas-stirred ladle. In present model,the effect of liquid-gas two phase flow caused by bottom blowing,and the oxygen absorption and oxidation reactions in slag eyes were considered,and model verification was carried out by 80 t ladle hot experiment. The effects of different blowing conditions on desulfurization efficiency in gas-stirred ladles were investigated. The results show that the gas-liquid two-phase flow has an important influence on the mass transfer rate of components and the desulfurization efficiency,and the predicted sulfur content changing with time in ladle agrees well with the measured data. The desulfurization efficiency of dual blowing is higher than that of single center or eccentric blowing. With the increasing of slag-metal height ratio,the desulfurization efficiency increases. But once the slag-metal height ratio exceeds 0.04,the desulfurization efficiency changes little. As the gas flow rate increases,the desulfurization rate increases first and then decreases. But when the bottom blowing flow exceeds 300 L/min,the desulfurization rate begins to decrease.
收稿日期: 2018-07-12
出版日期: 2018-12-24
引用本文:
娄文涛,刘 壮,王晓雨,朱苗勇. 底吹氩钢包内渣-金反应及脱硫行为的数值模拟[J]. , 2018, 53(12): 37-43.
LOU Wen-tao,LIU Zhuang,WANG Xiao-yu,ZHU Miao-yong. Numerical simulation of slag-metal reaction and desulfurization behavior in gas-stirred ladle. Iron and Steel, 2018, 53(12): 37-43.
吴铿, 梁志刚, 张二华等. Lf精炼过程中硫分配比和脱硫动力学方程研究[J]. 金属学报, 2001, 37(10): 1069-1072.WU Keng, LIANG Zhi-gang, ZHANG Er-hua, et al. Research on the slag-metal sulfur partition and the kinetics equation of desulfurization in LF refining process [J]. Acta Metall Sin. 2001, 37(10): 1069-1072.
[1]
吴铿, 梁志刚, 张二华等. Lf精炼过程中硫分配比和脱硫动力学方程研究[J]. 金属学报, 2001, 37(10): 1069-1072.WU Keng, LIANG Zhi-gang, ZHANG Er-hua, et al. Research on the slag-metal sulfur partition and the kinetics equation of desulfurization in LF refining process [J]. Acta Metall Sin. 2001, 37(10): 1069-1072.
[2]
李素芹, 熊国宏, 李士琦等. 极低硫钢的精炼脱硫动力学模型[J]. 北京科技大学学报, 2004, 26(3): 244-246LI Su-qin, XIONG Guo-hong, LI Shi-qi, et al. Dynamic model applied in ultra-low sulphur steel refining desurlfurization process [J]. Journal of University of Science and Technology Beijing. 2004, 26(3): 244-246.
[2]
李素芹, 熊国宏, 李士琦等. 极低硫钢的精炼脱硫动力学模型[J]. 北京科技大学学报, 2004, 26(3): 244-246LI Su-qin, XIONG Guo-hong, LI Shi-qi, et al. Dynamic model applied in ultra-low sulphur steel refining desurlfurization process [J]. Journal of University of Science and Technology Beijing. 2004, 26(3): 244-246.
[3]
Roy D, Pistorius P C, Fruehan R J. Effect of silicon on the desulfurization of al-killed steels: Part I. Mathematical model [J]. Metall. Mater. Trans. B, 2013, 44(5): 1086-1094.
[3]
Roy D, Pistorius P C, Fruehan R J. Effect of silicon on the desulfurization of al-killed steels: Part I. Mathematical model [J]. Metall. Mater. Trans. B, 2013, 44(5): 1086-1094.
[4]
Jonsson L, Sichen D, J?nsson P. A new approach to model sulphur refining in a gas-stirred ladle - A coupled CFD and thermodynamic model [J]. ISIJ Int., 1998, 38(3): 260-267.
[4]
Jonsson L, Sichen D, J?nsson P. A new approach to model sulphur refining in a gas-stirred ladle - A coupled CFD and thermodynamic model [J]. ISIJ Int., 1998, 38(3): 260-267.
[5]
Andersson M, Hallberg M, Jonsson L et al. Slag-metal reactions during ladle treatment with focus on desulphurisation [J]. Ironmak. Steelmak., 2013, 29(3): 224-232.
[5]
Andersson M, Hallberg M, Jonsson L et al. Slag-metal reactions during ladle treatment with focus on desulphurisation [J]. Ironmak. Steelmak., 2013, 29(3): 224-232.
[6]
Andersson M a T, Jonsson L T I, J?nsson P G. A thermodynamic and kinetic model of reoxidation and desulphurisation in the ladle furnace [J]. ISIJ Int., 2000, 40(11): 1080-1088.
[6]
Andersson M a T, Jonsson L T I, J?nsson P G. A thermodynamic and kinetic model of reoxidation and desulphurisation in the ladle furnace [J]. ISIJ Int., 2000, 40(11): 1080-1088.
[7]
Singh U, Anapagaddi R, Mangal S et al. Multiphase modeling of bottom-stirred ladle for prediction of slag–steel interface and estimation of desulfurization behavior [J]. Metall. Mater. Trans. B, 2016, 47(3): 1804-1816.
[7]
Singh U, Anapagaddi R, Mangal S et al. Multiphase modeling of bottom-stirred ladle for prediction of slag–steel interface and estimation of desulfurization behavior [J]. Metall. Mater. Trans. B, 2016, 47(3): 1804-1816.
[8]
Lou W, Zhu M. Numerical simulation of gas and liquid two-phase flow in gas-stirred systems based on Euler–Euler approach [J]. Metall. Mater. Trans. B, 2013, 44(5): 1251-1263.
[8]
Lou W, Zhu M. Numerical simulation of gas and liquid two-phase flow in gas-stirred systems based on Euler–Euler approach [J]. Metall. Mater. Trans. B, 2013, 44(5): 1251-1263.
[9]
Lou W T, Zhu M Y. Numerical simulation of desulfurization behavior in gas-stirred systems based on computation fluid dynamics-simultaneous reaction model (CFD-SRM) coupled model [J]. Metall. Mater. Trans. B, 2014, 45(5): 1706-1722.
[9]
Lou W T, Zhu M Y. Numerical simulation of desulfurization behavior in gas-stirred systems based on computation fluid dynamics-simultaneous reaction model (CFD-SRM) coupled model [J]. Metall. Mater. Trans. B, 2014, 45(5): 1706-1722.
[10]
Sun H, Pehlke R D. Modeling and experimental study of gaseous oxidation of liquid iron alloys [J], Metall. Mater. Trans. B, 1996, 27B(5): 854-864.
[10]
Sun H, Pehlke R D. Modeling and experimental study of gaseous oxidation of liquid iron alloys [J], Metall. Mater. Trans. B, 1996, 27B(5): 854-864.