Iron oxide activity in complex silicate slags

Oxygen potential, interpreted in terms of ferrous oxide activity, was measured by an electrochemical technique using a ZrO 2(+Y 2O 3) solid electrolyte in several slags. Reliability of cell operation was checked by measuring the free energy of formation of wüstite in equilibrium with iron. In the sy...

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Bibliographic Details
Published in:Solid state ionics 1981-01, Vol.3, p.541-545
Main Authors: Heikinheimo, E., Ryzhonkov, D., Paderin, S.
Format: Article
Language:English
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Summary:Oxygen potential, interpreted in terms of ferrous oxide activity, was measured by an electrochemical technique using a ZrO 2(+Y 2O 3) solid electrolyte in several slags. Reliability of cell operation was checked by measuring the free energy of formation of wüstite in equilibrium with iron. In the synthetic slags, ferrous oxide content varied in the range 0.2–21 wt%, Al 2O 3 content 9–12 wt%, and basicity ratio CaO/SiO 2 was 1.13–1.41. In the blast furnace slag, ferrous oxide content was initially 0.53 wt%. The temperature range was ≈1100–1400°C. The synthetic slags showed positive and the blast furnace slag negative deviation from ideal behaviour.
ISSN:0167-2738
1872-7689
DOI:10.1016/0167-2738(81)90147-8