A mathematical formulation is developed to represent the magneticfield intensity, the current density, the velocity field, the temperature field in the DC arc furnace bath.The governing equations are solved numericall...A mathematical formulation is developed to represent the magneticfield intensity, the current density, the velocity field, the temperature field in the DC arc furnace bath.The governing equations are solved numerically to describe the magnetic field intensity profiles, the current density profiles, Lorentz force profiles, streamline profiles, the velocity profiles and temperature profiles in the 30t DC-EAF bath. The theoretical predictions of temperature field are in good agreement with measurement in the 30t DC-EAF bath, and the recirculation rate of flow is also in good agreement with published estimation.展开更多
10炉非调质钢49MnVS3(/%:0.46~0.48C,0.30~0.40Si,0.88~0.92Mn,0.001~0.014P,0.004~0.005S,0.09~0.10V,0.19~0.22Cr)由100 t EBT DC EAF-LF-VD-260 mm×340 mm坯连铸-Φ140~150 mm材轧制流程生产。采用兑入75%铁水,EAF前期脱磷至≤0...10炉非调质钢49MnVS3(/%:0.46~0.48C,0.30~0.40Si,0.88~0.92Mn,0.001~0.014P,0.004~0.005S,0.09~0.10V,0.19~0.22Cr)由100 t EBT DC EAF-LF-VD-260 mm×340 mm坯连铸-Φ140~150 mm材轧制流程生产。采用兑入75%铁水,EAF前期脱磷至≤0.015%P,出钢前[C]为0.20%~0.30%,精炼时加150~200kg碳化硅,控制LF精炼渣碱度2.80~2.95,(CaO)/(Al_2O_3)=1.2~1.6,VD后喂1.5 m/t钙铁线,软吹时间≥15min等工艺措施,49MnVS3钢中[N]、[H]和[O]分别为130×10^(-6)~220×10^(-6),1.2×10^(-6)~1.5×10^(-6)和5×10^(-6)~11×10^(-6),成品材晶粒度≥5级,非金属夹杂物和低倍组织均≤1.5级,组织(带状≤1级)和力学性能(R_m803~883 MPa,R^(el)517~590 MPa,A 16%~21%,A^(KU)39~99 J)均满足标准要求。展开更多
文摘A mathematical formulation is developed to represent the magneticfield intensity, the current density, the velocity field, the temperature field in the DC arc furnace bath.The governing equations are solved numerically to describe the magnetic field intensity profiles, the current density profiles, Lorentz force profiles, streamline profiles, the velocity profiles and temperature profiles in the 30t DC-EAF bath. The theoretical predictions of temperature field are in good agreement with measurement in the 30t DC-EAF bath, and the recirculation rate of flow is also in good agreement with published estimation.
