title: Effect of shrouding CH4 flow rate on flow field and stirring ability of coherent jet in steelmaking process.
abstract: Characteristics of flow field and stirring ability of coherent jet with various shrouding CH4 flow rates on the molten bath were studied by combustion experiment and numerical simulation. The axial velocity and total temperature distributions of coherent jet under hot (1700 K) and cold (298 K) ambient condition were analyzed. The Eddy Dissipation Concept model was used in simulation with detail chemical kinetic mechanisms, and the numerical simulation results were agreed well with the combustion experiment in this research. Based on the simulation and experiment results, when the CH4 rate was 230, 207 and 184 Nm(3)/h, their disparity rate of average velocity and total temperature was small than 5 and 6 %, respectively, at high ambient temperature. Hence, the same stirring effect might be achieved by those three kinds of CH4 flow rates in EAF steelmaking process. According to the industrial application research, the best CH4 flow rate is 184 Nm(3)/h, which could stir molten bath well and reduce energy consumption in steelmaking process.
authors.affiliation: National Center for Materials Service Safety, University of Science and Technology Beijing, Beijing, 100083 China.
authors.forename: Fuhai
authors.initials: F
authors.lastname: Liu
authors.affiliation: National Center for Materials Service Safety, University of Science and Technology Beijing, Beijing, 100083 China.
authors.forename: Dongbai
authors.initials: D
authors.lastname: Sun
authors.affiliation: 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.
authors.forename: Rong
authors.initials: R
authors.lastname: Zhu
authors.affiliation: Rongcheng Jingye Technology Limited Company Beijing, Beijing, 100083 China.
authors.forename: Rongfang
authors.initials: R
authors.lastname: Su
authors.affiliation: Tianjin Pipe Co. Ltd., Tianjin, 300301 China.
authors.forename: Xueyi
authors.initials: X
authors.lastname: Wang
keywords: Coherent jet; Combustion experiment; Electric arc furnace; Numerical simulation