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炉渣离子与分子共存理论认为,CaO-SiO2-Al2O3-MgO-TiO2渣中结构单元或离子对的作用浓度能够像传统意义上的熔渣活度一样表征化学反应能力。通过建立1 773K时高炉CaO-SiO2-Al2O3-MgO-TiO2渣中结构单元或离子对的作用浓度控制方程,运用Matlab进行求解,进而建立了该渣系计算渣铁间硫分配比的通用热力学模型。此外,该模型能够定量计算出CaO和MgO各自对渣铁间硫分配比的热力学贡献率。建立的模型的计算结果表明,当TiO2含量增加时渣铁间硫分配比及CaO的热力学贡献率逐渐降低,而MgO的贡献率逐渐上升。
The theory of slag ion and molecule coexistence holds that the action concentration of structural unit or ion pair in CaO-SiO2-Al2O3-MgO-TiO2 slag can characterize the chemical reaction ability like the slag activity in the traditional sense. By establishing the governing equation of action concentration of structural unit or ion pair in CaO-SiO2-Al2O3-MgO-TiO2 slag at 1 773K and solving the problem by Matlab, a general thermodynamic model for calculating sulfur distribution ratio between slag and iron was established. . In addition, the model can quantitatively calculate the thermodynamic contribution of each of CaO and MgO to the sulfur distribution ratio between slag and iron. The calculated results show that when the content of TiO2 is increased, the sulfur distribution ratio between slag and iron and the contribution rate of CaO decrease gradually while the contribution rate of MgO increases gradually.