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The Activities of Fe x O in {CaO‐SiO 2 ‐Al 2 O 3 ‐MgO‐Fe x O} Slags at 1723 K
Author(s) -
Kishimoto T.,
Hasegawa M.,
Ohnuki K.,
Sawai T.,
Iwase M.
Publication year - 2005
Publication title -
steel research international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.603
H-Index - 49
eISSN - 1869-344X
pISSN - 1611-3683
DOI - 10.1002/srin.200506020
Subject(s) - sulfur , materials science , metallurgy , metal , zirconium , analytical chemistry (journal) , mineralogy , chemistry , chromatography
In Japanese steelworks, hot metal is now produced by scrap melting process. With this process removal of sulphur is very much handicapped because of very high sulphur levels (0.04 to 0.09 pct by weight) and relatively low tapping temperatures (1623 to 1723 K). In order to overcome such disadvantages, the authors explored on the phase diagrams of {CaO‐SiO 2 ‐Al 2 O 3 ‐MgO} slags, and this research revealed that those slags at 35 wt%‐Al 2 O 3 would be good candidates as reagents for the removal of sulphur from high sulphur hot metal at relatively low temperatures. For better understanding of the thermodynamic properties of the candidate slags, in this study, activities of Fe x O were determined by using solid‐state electrochemical cells incorporating MgO‐stabilized zirconia and Mo + MoO 2 reference electrode.