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Indexed by:会议论文

Date of Publication:2017-01-01

Included Journals:CPCI-S

Volume:141

Page Number:1008-1012

Key Words:Fused MgO; Electric arc furnace; Convection; Simulation

Abstract:In order to better understand the melt convection in an electro-fused magnesia furnace (EFMF), a 3D finite element method based model of the furnace is presented. The effect of the electromagnetic stirring and buoyancy driving forces on the melt flow are investigated in three typical cases with different bath dimensions. Dimensionless parameters including Reynolds number, Richardson number and Prandtl number are introduced to characterize the melt convection. The numerical results indicate that the convection is fully turbulent, and the flow and temperature fields are both significantly influenced by the line current. According to the calculated Richardson number, neither nature nor forced convection is negligible in all cases. The buoyancy becomes more important when the bath volume grows and the current decreases, and the magnetic stirring becomes more important when the bath volume shrinks and the current increases.