Activity model and its application in CaO-FeO-SiO₂-MoO₃ quarternary system

Peimin Guo, Zhengbang Li, and Gongwen LinCentral Iron and Steel Research Institute, Beijing 100081, China

摘 要：<正> The activity model of CaO-FeO-SiO2-MoO3 quarternary system was established according to the coexistence theory of slag structure and the reduction thermodynamics of molybdenum oxide was discussed by applying this model. The activities of SiO2 and MoO3 decrease, while that of CaO increases with increasing the basicity of slag. Among SiC, [C] and [Si] reactants, the reducing capability of SiC is the strongest, while that of [C] is the poorest at a high temperature （about 1873 K）. It is advantageous to increase the yield of molybdenum by increasing the content of [Si] or [C]. Controlling of basicity of slag can prevent the oxidation loss of molybdenum.

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