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Oxidation kinetics of ferrochrom under controlled oxygen pressures
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Materials Process Science.
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Materials Process Science.
2010 (English)In: Proceedings of the 12th International Ferroalloys Congress: Sustainable Future, 2010, 411-419 p.Conference paper (Refereed)
Abstract [en]

In order to make the stainless steel making process efficient and environment friendly, it is essential to minimize the loss of chromium to the slag phase. With a view to investigate the advantages of using CO2 to attain moderate oxygen partial pressures in the oxidant gas during the decarbirization of stainless steel, the present experiments were carried out to understand the oxidation kinetics of Fe-Cr alloy and Fe-Cr-C alloy with gas mixtures containing CO2. In the present work, the oxidation behavior of Fe-Cr was examined by thermogravimetric analysis (TGA). Various mixtures of O2 and CO2 were used as the oxidant gas and the oxidation rate was followed by the weight changes as a function of time. One trial was made on the oxidation of Fe-Cr-C alloy with CO2 as the oxidant. The experiments demonstrated that the oxidation rate is independent of temperature at present experimental situation, but has strongly related to the Cr-content of the alloy as well as the oxygen partial pressure in the oxidant gas mixture. The wetting of alumina by the iron drop and the change of the drop shape during the course of the oxidation were investigated by X-ray radiography.

Place, publisher, year, edition, pages
2010. 411-419 p.
Keyword [en]
Drop shape, Environment friendly, Fe-Cr-C, FeCr alloys, Function of time, Oxidation behaviors, Oxidation kinetics, Oxidation rates, Oxygen partial pressure, Oxygen pressure, Slag phase, Steelmaking process, Weight change, Carbon dioxide, Chromium, Chromium alloys, Drops, Experiments, Gas mixtures, Iron alloys, Oxidants, Oxidation, Partial pressure, Slags, Thermogravimetric analysis, Alumina
National Category
Metallurgy and Metallic Materials
URN: urn:nbn:se:kth:diva-148872ScopusID: 2-s2.0-84866141943ISBN: 978-952927340-9OAI: diva2:738009
12th International Ferroalloys Congress, INFACON 2010, 6 June 2010 through 9 June 2010, Helsinki, Finland

QC 20140815

Available from: 2014-08-15 Created: 2014-08-14 Last updated: 2014-08-15Bibliographically approved

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