Fundamentals of High Temperature Processes
Reevaluation and Measurements of FexO Activities in FexO–CaO–SiO2 Pseudo-ternary System at 1573 K
2021 年 61 巻 3 号 p. 697-704
詳細
2021 年 61 巻 3 号 p. 697-704
The knowledge of FexO activities in molten slags at lower temperatures is necessary for effective dephosphorization in hot metal pretreatments. However, there have been still differences among the reference data in the FexO–CaO–SiO2 pseudo-ternary system at 1573 K. In the present study, the FexO activities were measured with an electrochemical technique in order to reevaluate the iso-activity curves of FexO. Subsequently, the CaO and SiO2 activities along liquidus lines were calculated by the Gibbs-Duhem equation, and the equilibrium phosphorus contents in molten iron coexisted with dephosphorization slags were estimated by using the present results.
