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New Methods for In‐Situ Determination of Iron Oxide in Steelmaking Slags
Author(s) -
Schwerdtfeger Klaus
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.200506056
Subject(s) - steelmaking , oxide , materials science , iron oxide , metallurgy , limiting , current (fluid) , conductivity , analytical chemistry (journal) , chemistry , electrical engineering , mechanical engineering , environmental chemistry , engineering
Although iron oxide is the most important component of steelmaking slags, no reliable technique for its in‐situ determination has been established yet. This paper however, presents data on the effect of iron oxide on the electrical conductivity of CaO‐SiO 2 ‐FeO‐Fe 2 O 3 melts, and on limiting current and impedance in direct current or alternating current charge transfer at iron electrodes. The strong influence of iron oxide content can be utilized for in‐situ determination of total iron oxide content and Fe 3+ /Fe 2+ ratio. The possible probe designs are presented and the principles and procedures of the measurement are explained.