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Thermodynamics of manganese distribution between liquid iron and the CaO–Al 2 O 3 –SiO 2 –FeO–MnO system
Author(s) -
Mališ Aleš,
Langová Šárka,
Leško Juraj
Publication year - 1991
Publication title -
steel research
Language(s) - English
Resource type - Journals
eISSN - 1869-344X
pISSN - 0177-4832
DOI - 10.1002/srin.199101295
Subject(s) - manganese , chemistry , analytical chemistry (journal) , organic chemistry , chromatography
The thermodynamics of distribution of constituents between liquid iron and the CaO–Al 2 O 3 –SiO 2 –FeO–MnO system at 1600°C was studied using electrochemical indication of the equilibrium partial pressure of oxygen in both phases. The results show that oxidation potential of the Fe(l)–CaO–Al 2 O 3 –SiO 2 –FeO–MnO system, expressed in terms of log p (O 2 ), is directly proportional to log ( x (MnO) · x (FeO)/ w | Mn |). Manganese distribution coefficient, L' mn , in intersection CaO/Al 2 O 3 = 1 decreases with increasing slag basicity expressed in terms of activity a (CaO) or 1/γ(MnO). Experimentally determined equilibrium constant K Mn/Fe is equal to 2.7 for 1600°C. The number of exchanged electrons between Fe‐O‐Mn‐Si electrode and the slag approaches the theoretical value.