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Carbothermic Reduction of Alumina at 1 823 K: On the Role of Molten Iron and Reaction Mechanisms
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering.
2016 (English)In: ISIJ International, ISSN 0915-1559, E-ISSN 1347-5460, Vol. 56, no 7, 1300-1302 p.Article in journal (Refereed) Published
Abstract [en]

A possible reaction mechanism is presented for the low temperature carbothermic reduction of alumina in the presence of molten iron under inert conditions. This reduction was found to take place in a number of stages that involved the carburization of molten iron, disintegration of alumina into sub -oxide gases, reduction of these gases by the solute carbon followed by the capture of reduced aluminum by molten iron due to its high affinity. With increasing levels of aluminum in the iron, the wettability of alumina with molten metal undergoes a transition from poor wetting (with Fe) to good wetting (with Fe-Al-C) leading to the dissolution and subsequent reduction of alumina in the Fe -Al -C melt. These reaction steps were observed to occur in Al2O3-Fe2O3-C system at 1 823 K and atmospheric pressure.

Place, publisher, year, edition, pages
Iron and Steel Institute of Japan , 2016. Vol. 56, no 7, 1300-1302 p.
Keyword [en]
alumina, carbothermic reduction, molten iron, low temperature
National Category
Metallurgy and Metallic Materials
URN: urn:nbn:se:kth:diva-192421DOI: 10.2355/isijintemational.ISIJINT-2016-037ISI: 000380415600026ScopusID: 2-s2.0-84982295000OAI: diva2:968645

QC 20160912

Available from: 2016-09-12 Created: 2016-09-12 Last updated: 2016-09-12Bibliographically approved

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