Iron oxidation state analysis in oxide-fluoride slags

Levkov, L.Y.; Pankratov, D.А.

Авторы: Levkov L.Ya, Pankratov D.А.
Журнал: CIS Iron and Steel Review
Номер: 16
Год издания: 2018
Первая страница: 15
Последняя страница: 20
DOI: 10.17580/cisisr.2018.02.03
Аннотация: Development of significant provisions of the slag melts theory made it possible to substantiate a change in the average oxidation state (o.s.) of iron in the slag phase, and also to determine the conditions and limits of such changes. It is shown that the value of the equilibrium oxygen partial pressure, Po2 as a value available for measurements is possible to be taken as a measure of slag redox potential of, taking into account its electronic system performance (the Fermi level). It is established a functional relationship between the average o.s. of iron in the oxide-fluoride melted slags, Po2 value and the temperature. Taking into account the structural peculiarities of the external iron electron shells, a kind of dependence of its average o.s. in the slag phase on Ро2 was proposed and it was experimentally established that a decrease in Ро2 from 10–6 to 10–10 Pa at 1873 K leads to a decrease in by o.s. approximately a factor of 2. An increase in the iron content in a slag leads to a monotonous increase in its average o.s. The study of Mössbauer absorption spectra of quenched slag samples confirmed the possibility of simultaneous presence of iron in the slag in oxidation states from 0 to +3.
Добавил в систему: Панкратов Денис Александрович

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