基于有限差分法的废钢熔化数值模拟

Numerical Simulation of Steel Scrap Melting Based on Finite Difference Method

废钢比是衡量炼钢产业技术水平的标志,纵观国内外,发达国家的废钢比整体水平能够达到50%以上,而目前中国仅能达到20%左右,因此,提高废钢比迫在眉睫。主要对炼钢过程中一些主要参数值的计算进行研究,得出了传质系数关于温度的表达式,以及界面碳浓度关于时间和废钢比的函数关系;利用有限差分法解决了求解二阶偏微分的问题,最终给出了铁水温度随着废钢厚度方向上熔解距离的提高所产生温度的变化规律,当熔解距离为20mm左右时,温度达到废钢的熔点。当废钢比不断提高时,铁水的温度逐渐上升,且熔解距离逐渐提高。

The steel scrap ratio is a symbol of the technological level of the steelmaking industry.Throughout China and abroad,the steel scrap in developed countries could reach more than 50%of the overall level, while it could only reach about 20%in China.Therefore,increasing the steel scrap ratio is extremely urgent.The main parameters of the steelmaking process was calculated,the expression of the mass transfer coefficient with respect to the temperature,and the relationship of the interface carbon concentration with respect to the time t and the scrap ratio were obtained.S The finite difference method was used to solve the problem of second-order partial differential.The temperature change of the molten iron temperature in the direction of the thickness of the steel scrap was given.As the melting distance is about 20mm, the temperature reaches the melting point of the scrap steel.Meanwhile,when the steel scrap ratio increases continuously,the temperature of molten iron gradually rises and the melting distance gradually increases.