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.

• 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。