论文部分内容阅读
为了精确控制电渣重熔过程钢液的稀土含量,根据炉渣结构共存理论和相关相图,建立了La2O3-Al2O3-CaF2渣系的组元作用浓度计算模型,考察了炉渣成分、温度对渣中La2O3活度的影响。研究结果表明:模型计算的作用浓度值NLa2O3与文献实测的La2O3活度值吻合较好,说明本模型能够较好地反映该渣系的结构本质;La2O3活度随着渣系中Al2O3和CaF2含量的增加而降低,且Al2O3降低La2O3活度的能力比CaF2强;在成分为30%La2O3、20%Al2O3、50%CaF2(质量分数,下同)时,La2O3活度随着温度的升高而升高。因此,本模型能够对La2O3-Al2O3-CaF2渣系中La2O3活度进行定量分析,为电渣重熔过程精确控制钢液的稀土含量提供理论参考。
In order to precisely control the RE content of molten steel in ESR process, the calculation model of component concentration of La2O3-Al2O3-CaF2 slag system was established according to the coexistence theory of slag structure and relevant phase diagram. The effects of slag composition, La2O3 activity. The results show that the concentration calculated by the model NLa2O3 coincides well with the La2O3 activity measured in the literatures, indicating that the model can reflect the structural essence of the slag system. The activity of La2O3 increases with the increase of Al2O3 and CaF2 content , And the ability of Al2O3 to lower the activity of La2O3 is stronger than that of CaF2. When the composition is 30% La2O3, 20% Al2O3 and 50% CaF2 (mass fraction), the activity of La2O3 increases with the increase of temperature Rise. Therefore, this model can quantitatively analyze the activity of La2O3 in the La2O3-Al2O3-CaF2 slag system and provide a theoretical reference for the precise control of the rare earth content of the molten steel in the ESR process.