硫容量模型和在五元渣系CaO SiO2 MgO Al2O3 FetO中的应用

 硫容量和硫平衡分配比是衡量炼钢过程中渣系脱硫能力的重要指标。通过光学碱度模型和KTH模型计算了五元渣系CaO SiO2 MgO Al2O3 FetO的硫容量，并与文献的实验测定值进行了比较。结果表明用KTH模型计算的硫容量比用光学碱度模型计算的硫容量更接近实验值，因此KTH模型可用来预测不同组元渣系的硫容量。还详细研究了硫容量和硫平衡分配比的影响因素，结果表明硫容量随炉渣碱度和温度的增加而增加，硫平衡分配比随着钢液中铝、碳、硅含量的增加而增加。

Sulfide Capacity Model and Its Application in CaO-SiO2-MgO-Al2O3-FetO Slag System

The sulfide capacity (CS) and equilibrium distribution ratio of sulphur (LS) are important indicators to measure desulfurization capacity of slag system. The sulfide capacities of CaO SiO2 MgO Al2O3 FetO slags are calculated by optical basicity model and KTH model, and compared with measured values in literature. The results show that the values calculated by KTH model are nearer to measured values than by optical basicity model, so the former can be used to predict CS of different slag composition. The factors affecting CS and LS are also studied in detail. The results show that CS increases with increasing slag basicity and temperature, and LS increases with increasing Al], C] and Si] content in molten steel.