铁锰合金颗粒在底吹钢包内的运动分析

Analysis of Movement of Fe Mn Alloy Particles in a Bottom Stirred Ladle

建立了底吹钢包内加入合金后的运动过程数学模型，计算了铁锰合金颗粒在吹氩钢包内的熔化过程和运动轨迹。结果表明，铁锰合金颗粒的熔化时间长于其在钢液中的浸没时间，影响颗粒运动行为的两个显著因素是合金的密度和直径。合金密度与钢液越接近、颗粒直径越大，越有助于增加颗粒在钢液中的浸没时间，但颗粒直径的增大受熔化时间的限制。

A mathematical model is developed to analyze the movement of Fe Mn alloy in a bottom stirred ladle, the melting process and trajectories of alloying addition movement are calculated. It shows that the melting time of alloying addition is longer than its immersion time in molten steel, the density and diameter of particles of alloying addition are main factors affecting behavior of particles in molten steel. The immersion time of Fe Mn alloy particle gets longer with the increase of particle size as alloy density nears that of molten steel. However, the particle size is limited by the melting time.