利用规划理论和共存理论,以夹杂物与钢水之间氧化还原反应的自由能变化最小化为目标,以夹杂物中分子离子之间的化学反应达到平衡条件下的质量平衡方程为约束条件,建立了夹杂物组成与钢水成分、温度之间关系的数学模型.经生产试验检验,模型计算与实测值基本上能够很好地吻合. Using the planning theory and coexistence theory, the minimization of the free energy change between the inclusions and the molten steel is taken as the objective, and the mass balance equation under which the chemical reactions between the molecular ions in the inclusions reach equilibrium is taken as the constraint condition to establish The mathematical model of the relationship between the composition of inclusions and the composition of molten steel and the temperature was established.According to the test of production test, the model calculation and the measured value are basically in good agreement.