Abstract: Multiphase volume of fluid (VOF) method was used to simulate argon-steel-slag three-phase flow in a bottom-blown steelmaking ladle. Transient multiphase flow features in the ladle were described and compared with steady simulation. Slag eye diameter and droplet dispersion height were quantified under different gas flow rates, showing that as gas flow rate rose, slag eye diameter and slag droplet dispersion height increased and jumped at 600 L/min, so critical gas flow rate was 600 L/min. Slag eye diameter dropped sharply from 455 to 110 mm, and the possibility of slag entrapment increased, when the slag layer height rose from 150 to 300 mm at the gas flow rate of 300 L/min.

Key words: argon-stirred ladle, three-phase flow, numerical simulation, slag eye diameter, slag entrapment

摘要： 采用多相流体积法对某钢厂的LF炉底吹钢包建立了氩气/钢液/钢渣三相瞬态数学模型. 描述了钢包内多相流动的基本形貌，并与稳态计算的结果进行了对比；研究了不同吹气流量对渣滴卷入深度和渣眼直径的影响. 计算结果表明，渣滴卷入深度和渣眼直径随吹气流量的增加而增加，且在吹气流量为600 L/min时发生骤增，该流量为临界卷渣吹气流量；在保持吹气流量为300 L/min的条件下，当渣层厚度从150 mm增加到300 mm时，渣眼直径由455 mm减小至110 mm，且此时更容易发生卷渣现象.

关键词: 底吹钢包, 三相流, 数值模拟, 渣眼直径, 卷渣