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Анализ фазовых равновесий в системе «оксиды железа – углерод – CO – CO2»

Authors: Mikhailov, G. G.; Kuznetsov, Yu. S.; Kachurina, O. I.; Chernukha, A. S.;

Анализ фазовых равновесий в системе «оксиды железа – углерод – CO – CO2»

Abstract

При расчетах равновесных параметров, реализующихся при восстановлении оксидов железа в атмосфере «CO – CO2» в присутствии углерода, использовались термодинамические характеристики реакций восстановления оксидов железа, реакции газификации углерода и диаграмм состояния «железо – кислород» и «железо – углерод». Определены не только состав газовой фазы, но и составы конденсированных фаз (вюстита и насыщенного углеродом железа). Температура полного восстановления железа 955 К. Равновесная температура появления жидкого железа при косвенном восстановлении оксидов железа около 1427 К. Получающееся при восстановлении железо насыщено углеродом, равновесная концентрация которого при температурах выше 955 К соответствует диаграмме состояния «железо – углерод». Термодинамические параметры процессов цементации железа и обезуглероживания сталей и чугунов согласуются с равновесной фазовой диаграммой системы «FeO1+x – Fe – CO – CO2FeO1+x – углерод». At calculations of the equilibrium parameters realized at reduction of iron oxides in an atmosphere «CO – CO2» in presence of carbon, thermodynamic characteristics of reactions of reduction of oxides, reaction of gasification of carbon and phase diagrams of “iron – oxygen” and “iron – carbon” systems were used. Were determined not only compositions of the gas phase, but also compositions of the condensed phases (wustite and carbon-saturated iron). Temperature of full reduction of iron is 955 K. Equilibrium temperature of occurrence of liquid iron at indirect reduction of iron oxides is near 1427 K. The iron obtained by reduction is saturated by carbon, and its equilibrium concentration at temperatures above 955 K corresponds to the phase diagram of “iron – carbon” system. Thermodynamic parameters of processes of carburization of iron and decarburization of steels and cast irons correspond to the equilibrium phase diagram of the “FeO1+x – Fe – CO – CO2 – carbon” system. Михайлов Геннадий Георгиевич, доктор технических наук, профессор, заведующий кафедрой физической химии, Южно-Уральский государственный университет. Тел.: (351)2656205. E-mail: mikhailov-gg @mail.ru. Кузнецов Юрий Серафимович, кандидат технических наук, профессор кафедры физической химии, Южно-Уральский государственный университет. Тел.: (351)2679491. Качурина Ольга Ивановна, кандидат химических наук, доцент кафедры неорганической химии, Южно-Уральский государственный университет. Чернуха Александр Сергеевич, студент кафедры физической химии, Южно-Уральский государственный университет. Mikhaylov Gennadiy Georgievich, doctor of engineering science, professor, head of the Physical Chemistry Department, South Ural State University. 76 Lenin avenue, Chelyabinsk, Russia 454080. Tel.: 7(351)2656205. E-mail: mikhailov-gg@mail.ru. Kuznetsov Yuriy Serafimovich, candidate of engineering science, professor of the Physical Chemistry Department, South Ural State University. 76 Lenin avenue, Chelyabinsk, Russia 454080. Tel.: (351)2679491. Kachurina Ol'ga Ivanovna, candidate of chemical science, associate professor of the Inorganic Chemistry Department, South Ural State University. 76 Lenin avenue, Chelyabinsk, Russia 454080. Chernukha Aleksandr Sergeevich, student of the Physical Chemistry Department, South Ural State University. 76 Lenin avenue, Chelyabinsk, Russia 454080.

Country
Russian Federation
Keywords

saturated solutions, оксиды железа, углерод, активность углерода, iron oxides, УДК 669.1.017.3, carbon, carbon activity, reduction, насыщенные растворы, УДК 669.1, ГРНТИ 53.31, восстановление, phase equilibria, фазовые равновесия

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
Green