Abstract:

The influence of the composition of CaO-SiO₂-Al₂O₃-TiO₂ slag on the slag denitrification ability at 1 600 ℃ was explored by the FactSage thermodynamic calculation software. The results show that the denitrification ability can be represented as individual elements TiO₂> SiO₂> Al₂O₃> CaO, under the condition of the same capacity of nitrogen, the basicity of slag increases with the increase of the content of TiO₂.The slag series with relatively good denitrification ability was analyzed when w(TiO₂) = 0,25%, 50%.The content of TiO₂ in CaO-SiO₂-Al₂O₃-TiO₂ slag can be adjusted according to the requirements of different steel grades for basicity of slag, so as to optimize the denitrification effect of slag. Compared with the actual data, the FactSage software was proved to be reliable in predicting the variation trend of nitrogen capacity of slag with different components.

Key words: slag, nitrogen capacity, denitrification, TiO₂