直流电熔炉岩棉熔体数值模拟研究

Numerical Simulation of Stone Wool Melt in Direct Current Furnace

采用ANSYS软件对直流电熔炉岩棉熔体进行数值模拟,在稳定电压130 V、稳定熔体高度1 600 mm和进出料稳定状态下,改变阴极电极的插入深度,研究电熔炉熔体的温度分布、流场分布、电流密度分布状况。研究发现,熔体在阴极和阳极之间以及电极周围形成高温区,由阳极至阴极方向及入口对称侧由上至下方向,温度呈现降低趋势,入口侧温度由上至下方向呈现升高趋势。随着阴极插入深度增加,熔体的整体温度及相应的电流密度上升。阴极插入深度越深,整体温场升温幅度越大。在进料口侧和出料口侧,熔体因自然对流分别形成环流,环流具有的自搅拌和自均化作用对熔体均化具有重要的工艺意义。通过改变阴极插入深度可以提高熔体控制能力,有利于提高后续成纤效果与质量。

ANSYS software was used for numerical simulation of stone wool melt in electric melting furnace.Under stable voltage 130 V,stable melt height 1600 mm and stable inlet and outlet state,the insertion depth of cathode electrode was changed to study the temperature distribution,flow field distribution and current density distribution of the melting in electric melting furnace.The results show that the melt forms a high temperature zone between the cathode and anode and around the electrode,The temperature decreases from anode to cathode and from top to bottom on the symmetrical side of the inlet,while the temperature increases from top to bottom on the inlet side.With the increase of cathode insertion depth,the overall temperature and corresponding current density of the melt increase.The deeper the cathode insertion depth is,the greater the temperature rise of the whole temperature field is.At the inlet side and the outlet side,the melt forms a circulation due to natural convection,and the self-stirring and self-homogenization of the circulation have important technological significance for melt homogenization.Changing the cathode insertion depth can improve the melt control ability and improve the subsequent fiber forming effect and quality.