熔融スラッグに関する統計熱力学的研究

抄録

For the purpose of determining the scale of the oxidizing power of steelmaking slag, the electromotive forces of Pt|FeO-Fe₂O₃-CaO-SiO₂|Fe were measured in air, pure oxygen of 1 atm, and argon (P_O2<10⁻³ atm). All measurements were made at ca. 1400°C. It was clarified by statisticothermodynamical analysis that the iron oxide phase I is formed around the iron electrode by its oxidation, and the electromotive force is due to the following cell reaction:
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\ oindentwhere the phase I and II(slag) in the cell are both in equilibrium with atmosphere. Then the electromotive force E may be expressed by the following equation,
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\ oindentwhere (a_T.FeO)_I and (a_T.FeO)_II are the activities of T.FeO of the phases I and II, respectively. The activities of T.FeO of slags can be estimated from the electromotive force of this cell.