Shao-yan Hu1,2 �� Rong Zhu1,2 �� Run-zao Liu1,2 �� Kai .Dong1,2 �� Fu-hai .Liu1,2 �� Guo-hong .Ma1,2 �� Rong-fang Su3
1 School of Metallurgical and Ecological Engineering ,University of Science and Technology Beijing ,Beijing 100083 , China 2 Beijing Key Laboratory of Research Center of Special Melting and Preparation of High-end Metal Materials ,University of Science and Technology Beijing ,Beijing 100083 , China 3 Rongcheng Jingye Technology Limited Company Beijing ,Beijing 100083 , China
Shao-yan Hu1,2 �� Rong Zhu1,2 �� Run-zao Liu1,2 �� Kai .Dong1,2 �� Fu-hai .Liu1,2 �� Guo-hong .Ma1,2 �� Rong-fang Su3
1 School of Metallurgical and Ecological Engineering ,University of Science and Technology Beijing ,Beijing 100083 , China 2 Beijing Key Laboratory of Research Center of Special Melting and Preparation of High-end Metal Materials ,University of Science and Technology Beijing ,Beijing 100083 , China 3 Rongcheng Jingye Technology Limited Company Beijing ,Beijing 100083 , China
ժҪ Coherent jet technology has been widely used in EAF steelmaking process because of the longer potential core length and stronger impacting power of the supersonic oxygen jet. However, more oxygen and fuel gas are consumed to achieve excel-lent characteristics of coherent jets, which causes the increase in steelmaking cost. Computational .uid dynamics simulation and experimental measurement of the coherent jets with CH4 +.N2 mixed fuel gas were carried out aiming at reducing the consumption of fuel gas. The numerical simulation results showed good agreement with the experimental data. As a result, high proportion of N2 negatively a.ects the combustion of CH4, which is not good for the protection of oxygen jets. While the gas composition is 75% CH4 + 25% N2, the N2 addition to the CH4 leads to an expanding of CH4 combustion zone, and the energy generated by the combustion reaction could be delivered to the molten bath more e. ciently, which is one control scheme with high performance�Cprice ratio.
Abstract��Coherent jet technology has been widely used in EAF steelmaking process because of the longer potential core length and stronger impacting power of the supersonic oxygen jet. However, more oxygen and fuel gas are consumed to achieve excel-lent characteristics of coherent jets, which causes the increase in steelmaking cost. Computational .uid dynamics simulation and experimental measurement of the coherent jets with CH4 +.N2 mixed fuel gas were carried out aiming at reducing the consumption of fuel gas. The numerical simulation results showed good agreement with the experimental data. As a result, high proportion of N2 negatively a.ects the combustion of CH4, which is not good for the protection of oxygen jets. While the gas composition is 75% CH4 + 25% N2, the N2 addition to the CH4 leads to an expanding of CH4 combustion zone, and the energy generated by the combustion reaction could be delivered to the molten bath more e. ciently, which is one control scheme with high performance�Cprice ratio.
2018, Vol. 25 
