CAJ | 학술논문

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(6.0 L/min)下夹杂物在拉速1.3 m/min时去除率最低.同一拉速(1.2 m/min)下存在临界气量9.0 L/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.
침대취아판배련주결정기내비금속협잡물거제문제,채용준단상모형화리산상모형묘술료수-공기-협잡모의물체계화강액-아기-협잡물체계적입자행위화거제효솔.결과표명,취아유리우협잡물상부거제,동일기량(6.0 L/min)하협잡물재랍속1.3 m/min시거제솔최저.동일랍속(1.2 m/min)하존재림계기량9.0 L/min,소우림계기량,취아가증가협잡물상부솔,감소진입주배솔:대우림계기량,협잡물상부솔감소,진입주배솔증대.준단상모형화리산상모형능교호지모의협잡물재기액량상중적운동화거제.
Aiming at the removal of non-metaUie 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.