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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。
In order to reduce the content of titanium in hot metal, sinter ore or pellet is used to pre-treat the hot metal. Based on the theory of coexistence, the calculation model of TiO2 activity in the typical slag-based SiO2-TiO2-CaO-MgO-FeO-MnO ladle was established by using Matlab programming software. The results show that with the increase of MgO, FeO, MnO molar fraction and basicity of slag, the activity of TiO2 in titanizing slag decreases. With the increase of TiO2 molar fraction, the activity of TiO2 increases. The titanium content in the hot metal at the end of titanium removal is linear with the silicon content. The slope is affected by temperature, hot metal composition and the activity of SiO2 and TiO2 in the slag. The calculated results are in good agreement with the test results and actual production data.