Mathematical Model of Scrap Melting in EAF using Electromagnetic Stirring
The influence of electromagnetic stirring on melting of a single piece of scrap in an eccentric bottom tapping (EBT) electric arc furnace (EAF) was studied numerically. A mathematical model was developed to study the heat transfer and fluid flow in the melt for conditions both with and without electromagnetic stirring. The source terms for momentum transfer were electromagnetic and buoyancy forces, and the only source term considered in the energy conservation equation was the arc power. A finite element method (FEM) based software VectorFields OPERA was used to add electromagnetic forces to the momentum equation, and a finite volume method (FVM) based software FLUENT was used to solve momentum conservation, continuity and energy conservation equations inside the melt. The slag is modeled explicitly as a solid wall with high thermal conductivity. The enthalpy-porosity technique was applied to track the phase change of a scrap piece defined in the EBT region of the furnace. The model was applied for different scrap sizes, preheating temperatures, stirring directions and force magnitudes. The predicted heat transfer rate at the melt-scrap interface was used to estimate the heat transfer coefficient. It was seen that the electromagnetic stirring is a viable way to improve the melting capability of the EAF.
EAF Electric Arc Furnace Mathematical Model CFD Electromagnetic Stirring
Niloofar Arzpeyma Ola Widlund Mikael Ersson P(a)r J(o)nsson
Department of Materials Science and Engineering, Royal Institute of Technology (KTH), SE-100 44, Sto ABB AB, Corporate Research, SE-721 78, V(a)ster(a)s, Sweden
国际会议
Ninth International Conference on Molten Slags,Fluxes and Salts(第九届国际熔渣、溶剂与熔盐学术会议 MOLTEN12)
北京
英文
1-16
2012-05-27（万方平台首次上网日期，不代表论文的发表时间）