炉底电极形式对直流电弧炉内熔体中电磁场的影响

Effect of the Type of Bottom Electrode on Electromagnetic Field in DC Arc Furnace Bath

通过解析直流电弧炉条件下的麦克斯韦等方程，研究了炉底电极形式对直流电弧炉内熔体中电磁现象的影响．结果表明，炉内熔体中的电流、电磁场及电磁力的分布强烈地依赖于炉底电极的形式．小直径导电炉底电极时，顶、底电极附近钢水中的电流、电磁场和电磁力较强，且受力方向相反；大直径炉底电极时．只有顶电极附近的钢水中的电流、电磁场和电磁力较强，且该区域受力方向向下．

The effect of the type of the bottom electrode on electromagnetic field in DC arc furnace bathwas studied by solving the Maxwell's equations. The results show that the distributions of current,magneticfield and electromagnetic force greatly depend on the type of the bottom electrode. When using a small areabottom electrode,the current,magnetic field and electromagnetic force in the bath close to either the top orthe bottom electrode are all of great values with a couple of forces in opPOsite direction,while a large area bottom electrode is used,only the above three parameters close to the top electrode are of great values withdownward forces.