SiO2-TiO2-CaO-MgO-FeO-MnO渣系与脱钛过程铁水中Ti-Si平衡热力学模型

 为降低铁水中钛含量，采用烧结矿或球团矿进行铁水包脱钛预处理。基于共存理论，采用Matlab编程软件，建立了铁水包脱钛典型渣系SiO2-TiO2-CaO-MgO-FeO-MnO中TiO2活度计算模型。结果表明，随着MgO、FeO、MnO摩尔分数和炉渣碱度的增大，脱钛渣中TiO2活度下降;随着TiO2摩尔分数的增大，TiO2活度提高。脱钛终点铁水中的钛含量与硅含量呈线性关系，其斜率受温度、铁水成分以及炉渣中SiO2和TiO2活度的影响。计算结果与试验结果及实际生产数据十分吻合。

SiO2-TiO2-CaO-MgO-FeO-MnO Slag System and Thermodynamic Model of Ti-Si Equilibrium in Titanium Removing Process

In order to decrease titanium content in hot metal, a method of removing titanium in hot metal using sinter or pellet has been invented. An activity model of titanium in SiO2-TiO2-CaO-MgO-FeO-MnO slag system was built using software Matlab basing on the coexistence theory. The calculation result shows that the activity of TiO2 will decrease with the increase of MgO, FeO and MnO mole fraction and the increase of basicity. At the same time, it also grows up when the TiO2 mole fraction increases. Final titanium content in titanium removal process is proportional to the silicon content in hot metal. The proportional coefficient can be affected by temperature, metal content and the activities of SiO2 and TiO2 in slag. The calculated results meet with the experimental and industrial data.