直流电弧炉内热流和废钢熔化过程的数值模拟  

Numerical Simulation of Heat Transfer Flow and Scrap Melting Process in DC Electric Arc Furnace

作　　者：武文辉 赵增武[1,2] 李永治 WU Wenhui;ZHAO Zengwu;LI Yongzhi(School of Energy and Environment,Inner Mongolia University of Science and Technology,Baotou 014000,China;Key Laboratory of Integrated Exploitation of Bayan Obo Multi-metal Resources,Inner Mongolia University of Science and Technology,Baotou 014000,China;School of Science,Inner Mongolia University of Science and Technology,Baotou 014000,China)

机构地区：[1]内蒙古科技大学能源与环境学院,内蒙古包头014000 [2]内蒙古科技大学内蒙古自治区白云鄂博矿多金属资源综合利用重点实验室,内蒙古包头014000 [3]内蒙古科技大学理学院,内蒙古包头014000

出　　处：《工业加热》2023年第2期48-53,共6页Industrial Heating

摘　　要：以废旧钢铁为原料,采用国内某0.5 MW直流电弧炉为原型,并通过有限元法和商业软件ANSYS Fluent,将炉内电弧射流部分和熔池部分的温度场、速度场和电磁场等进行建模解析,模拟结果显示:①熔池首先在电弧下方形成,然后随着时间的进行逐渐扩大;电弧冲击力与洛伦兹力是熔池内部搅拌的主要驱动力;电势差主要集中在电弧射流部分。②电弧炉内的电流密度、温度分布具有典型的局部特性,主要集中在电极处和电极附近阴极斑点区域;在电弧与熔池的交界面处,温度、电流密度均在对称轴处呈现较大值,然后向四周逐渐递减。仿真结果与相关文献的实测结果吻合良好。The waste steel is used as raw material,and a 0.5 MW DC arc furnace is used as the prototype,and the temperature field,velocity field and electromagnetic field of arc jet and molten pool in the furnace are modeled and analyzed by finite element method and commercial software ANSYS Fluent.The simulation results show that:①The molten pool first forms under the arc and then expands gradually over time.Arc impact force and Lorentz force are the main driving forces of mixing in molten pool.The potential difference is mainly concentrated in the arc jet part.②The current density and temperature distribution in the arc furnace have typical local characteristics,mainly concentrated at the electrode and near the electrode cathode spot area.At the interface between arc and molten pool,the temperature and current density show a large value at the symmetry axis,and then decrease gradually.The simulation results are in good agreement with the measured results in related literatures.

关 键 词：直流电弧炉 数值模拟 废钢熔化 多物理场耦合 

分 类 号：TM924.4[电气工程—电力电子与电力传动]