外加直流电场无污染脱氧模拟研究

Simulation Study on Deoxidization Method with No Pollution under Direct Current Electric Field

为了更好地提高脱氧效率,建立了渣-钢外加电场脱氧系统模拟模型。模拟分析了电场参数、电极参数、熔渣及钢液属性等对渣-钢系统中电流密度分布的影响,并对模拟结果进行试验验证。结果表明,随着系统施加电压、阳极电极直径的增加和阳极到渣-钢界面距离的缩短,系统中的最大电流密度增大;渣电阻率的降低有助于提高阳极附近的电流密度,而渣的相对介电常数的增大有利于系统中最大电流密度的提高;脱氧速率最高可以达到0.002 18%/min。

In order to improve the efficiency of deoxidization, the steel-slag simulation model for the deoxidization system under direct current electric field is made. The effects of the electric field parameters, the electrode parameters, the properties of the molten slag and molten steel on the distribution of the current density in the steel-slag deoxidization system are analyzed based on simulation experiments and the simulation results are verified based on experiments. The verified results show that the density of the maximum current in the system increases with the increase of the voltage and the anode electrode diameter while the gap between the anode and the steel-slag interface is getting smaller. The decreasing of slag resistivity is helpful to enhance the current density in the vicinity of the anode while the enlargement of the relative dielectric constant of the slag is beneficial to enhance the density of the maximum current in the system. Then the maximum rate for deoxidization can research to 21.80×10-6/min.