MgO·Al₂O₃ spinel inclusion (from here, “Mg–Al inclusion”) is harmful to the properties of steel products. Many efforts have been made to control the composition of harmful inclusions during ladle treatment where the complex reactions among molten steel, slag, refractory, deoxidation products and alloying elements occur simultaneously. It is well known that the pure Al₂O₃ inclusion changes to Mg–Al inclusion because of the reaction with Mg content in molten steel. In the present work, in order to predict inclusion evolution from Al₂O₃ inclusion to Mg–Al inclusion, we have introduced the kinetic model that applies Mg content changes in spinel. By the brushed-up model, the influence of Cr content in steel and slag composition on the behaviors of Mg–Al inclusion has been investigated.

MgO·Al ₂ O ₃尖晶石夹杂物（此处为“ Mg–Al夹杂物”）对钢材的性能有害。在钢包处理过程中，人们进行了许多努力来控制有害夹杂物的成分，在钢包处理过程中，钢水，炉渣，耐火材料，脱氧产物和合金元素同时发生复杂的反应。众所周知，纯Al ₂ O ₃夹杂物会与钢水中的Mg含量发生反应而变为Mg–Al夹杂物。在目前的工作中，为了预测Al ₂ O _3的夹杂物演化夹杂到镁铝夹杂物中，我们介绍了应用尖晶石中镁含量变化的动力学模型。通过刷涂模型，研究了钢中Cr含量和炉渣成分对Mg-Al夹杂物行为的影响。