Simulation of EAF refining stage

Abstract The refining stage in the electric arc furnace contributes to the enhancement of the metallurgical and industrial parameters and the improvement of performance in steelmaking plants. The aim of this study is to compare effects induced by natural and forced convection stirring. Two 3D computational fluid dynamics models were prepared to analyze the melt flow and heat profiles inside the electric arc furnace using FLUENT software. The modeling utilized transient solver with realize k-ɛ turbulence model, in natural and forced convection cases. The results of this work (represented by screenshots for velocity and temperature distributions) indicated maximum and minimum values locations. The maximum melt velocity inside the electric arc furnace was found at the steel melt outlet. Aim The refining stage in the electric arc furnace contributes to the enhancement of the metallurgical and industrial parameters and the improvement of performance in steelmaking plants. The aim of this study is to compare effects induced by natural and forced convection stirring. Methods Two 3D computational fluid dynamics models were prepared to analyze the melt flow and heat profiles inside the electric arc furnace using FLUENT software. The modeling utilized transient solver with realize k-ɛ turbulence model, in natural and forced convection cases. Results screenshots for velocity and temperature distributions indicated maximum and minimum values locations. Conclusions the maximum melt velocity inside the electric arc furnace was found at the steel melt outlet.

[1]  S. Chakraborty,et al.  Numerical Investigation of Chaotic Mixing in Gas Stirred Steel Ladles , 2004 .

[2]  Xiang Bao,et al.  Simulation and Application of Bottom-Blowing in Electrical Arc Furnace Steelmaking Process , 2015 .

[3]  B. Thomas,et al.  Large Inclusions in Plain-carbon Steel Ingots Cast by Bottom Teeming , 2006 .

[4]  Manabu Iguchi,et al.  Mathematical modeling of flow and inclusion motion in vessel with natural convection , 2001 .

[5]  A. Ghosh,et al.  Mathematical Modelling of Heat Transfer Phenomena in Continuous Casting of Steel , 1993 .

[6]  Yuhua Pan,et al.  Physical and Mathematical Modelling of Thermal Stratification Phenomena in Steel Ladles , 2002 .

[7]  M. R. R. I. Shamsi,et al.  Three dimensional turbulent fluid flow and heat transfer mathematical model for the analysis of a continuous slab caster , 2007 .

[8]  Ola Widlund,et al.  Mathematical Modeling of Scrap Melting in an EAF Using Electromagnetic Stirring , 2013 .

[9]  Anurag Tripathi,et al.  Numerical Simulation of Heat Transfer Phenomenon in Steel Making Ladle , 2012 .

[10]  Suman Chakraborty,et al.  Numerical Investigation on Role of Bottom Gas Stirring in Controlling Thermal Stratification in Steel Ladles , 2004 .

[11]  P. Jönsson,et al.  The Use of Fundamental Process Models in Studying Ladle Refining Operations , 2001 .

[12]  M. López-Cornejo,et al.  Mathematical Modeling of the Melting Rate of Metallic Particles in the EAF under Multiphase Flow , 2015 .

[13]  R. J. O’Malley,et al.  Transient fluid flow and superheat transport in continuous casting of steel slabs , 2005 .

[14]  Chenn Q. Zhou,et al.  Modeling of Three-phase Flows and Behavior of Slag/Steel Interface in an Argon Gas Stirred Ladle , 2008 .

[15]  G. Irons,et al.  Developments in modelling of gas injection and slag foaming , 2002 .

[16]  Yuri N. Toulouevski,et al.  Innovation in Electric Arc Furnaces , 2010 .

[17]  Miao‐yong Zhu,et al.  Numerical Simulations of Inclusion Behavior and Mixing Phenomena in Gas-stirred Ladles with Different Arrangement of Tuyeres , 2014 .

[18]  Sam Howison,et al.  Practical Applied Mathematics Modelling, Analysis, Approximation , 2005 .

[19]  Baokuan Li Fluid Flow and Mixing Process in a Bottom Stirring Electrical Arc Furnace with Multi-plug , 2000 .

[20]  Hsuan-Chung Wu,et al.  The Effects of Bottom Blowing Gas Flow Rate Distribution During the Steelmaking Converter Process on Mixing Efficiency , 2016, Metallurgical and Materials Transactions B.

[21]  Gerardo Trapaga,et al.  Modeling of a DC Electric Arc Furnace-Mixing in the Bath , 2001 .

[22]  Yi Chen NUMERICAL AND EXPERIMENTAL STUDY OF MARANGONI FLOW ON SLAG-LINE DISSOLUTION OF REFRACTORY , 2012 .

[23]  Anders Tilliander,et al.  A First Attempt to Implement a Swirl Blade in Production of Ingots , 2010 .

[24]  Hae-geon Lee,et al.  A CFD-based Nucleation-growth-removal Model for Inclusion Behavior in a Gas-agitated Ladle during Molten Steel Deoxidation , 2008 .

[25]  Niloofar Arzpeyma,et al.  Modeling of Electric Arc Furnaces (EAF) with electromagnetic stirring , 2011 .

[26]  A. Conejo,et al.  Effect of Foamy Slag Height on Hot Spots Formation inside the Electric Arc Furnace Based on a Radiation Model , 2012 .

[27]  K. Dong,et al.  Research and Analysis on the Physical and Chemical Properties of Molten Bath with Bottom-Blowing in EAF Steelmaking Process , 2016, Metallurgical and Materials Transactions B.

[28]  Marco A. Ramírez-Argáez,et al.  Effect of Arc Length on Fluid Flow and Mixing Phenomena in AC Electric Arc Furnaces , 2010 .

[29]  C. A. Gonzalez,et al.  Effect of Both Radial Position and Number of Porous Plugs on Chemical and Thermal Mixing in an Industrial Ladle Involving Two Phase Flow , 2011 .

[30]  Richard J. Fruehan,et al.  Computational fluid-dynamics simulation of postcombustion in the electric-arc furnace , 2003 .

[31]  Herbert Pfeifer,et al.  Investigation on the Influence of the Arc Region on Heat and Mass Transport in an EAF Freeboard using Numerical Modeling , 2016 .

[32]  J. Bellot,et al.  Numerical Modelling of Inclusion Behaviour in a Gas-stirred Ladle , 2012 .

[33]  P. Jönsson,et al.  Numerical Simulation of Single Argon Bubble Rising in Molten Metal Under a Laminar Flow , 2015 .

[34]  M. A. Sattar,et al.  Numerical Simulation of Slag Foaming in High Temperature Molten Metal with Population Balance Modeling , 2013 .