中文摘要：

针对吹氩板坯连铸结晶器内非金属夹杂物去除问题，采用准单相模型和离散相模型描述了水-空气-夹杂模拟物体系和钢液-氩气-夹杂物体系的粒子行为和去除效率．结果表明，吹氩有利于夹杂物上浮去除，同一气量（6．0L／min）下夹杂物在拉速1.3m／min时去除率最低．同一拉速（1．2m/min）下存在临界气量9．0L／min，小于临界气量，吹氩可增加夹杂物上浮率，减小进入铸坯率；大于临界气量，夹杂物上浮率减少，进入铸坯率增大．准单相模型和离散相模型能较好地模拟夹杂物在气液两相中的运动和去除．

英文摘要：

Aiming at the removal of non-metallic inclusions in liquid steel in a slab continuous casting mold, the harmonious phase model （HPM） and discrete phase model （DPM） were used to describe the particle behavior and removal rate in water-air-inclusion simulation and steel-argon-inclusion systems. The results showed that the argon blowing promotes inclusion removal. In the study on the mold, inclusion removal efficiency is the lowest at 1.3 m/min casting speed with 6.0 L/min gas flow rate. The inclusion trapping rate from domain decreases with the increase of gas flow rate blown, the critical 9.0 L/min gas flow rate is obtained at 1.2 m/min casting speed, while the inclusion trapping rate into slab increases with the increase of gas flow rate beyond the critical one. HPM and DPM can simulate behavior and removal of inclusions in the gas-liquid two-phase flow.