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Isothermal reduction kinetics of self-reducing mixtures
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Mineralteknik och metallurgi.ORCID-id: 0000-0002-2358-7719
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Mineralteknik och metallurgi.ORCID-id: 0000-0003-0278-1333
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Mineralteknik och metallurgi.
Rekke forfattare: 32017 (engelsk)Inngår i: Ironmaking & steelmaking, ISSN 0301-9233, E-ISSN 1743-2812, Vol. 44, nr 1, s. 66-75Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Isothermal reduction of haematite carbon mixtures was investigated at temperatures 750–1100°C under inert atmosphere. Mass loss curves proved the stepwise reduction of haematite to metallic iron. The non-linear feature of haematite to magnetite reduction kinetics was observed and an activation energy of 209 kJ mol−1 was calculated. Irrespective of carbon-bearing material type, reduction rate of magnetite was linear. Activation energy values were calculated to be 293–418 kJ mol−1. Significant increase in the reduction kinetics in the last step (Wustite reduction) was observed and explained by the catalytic effect of freshly formed metallic iron. During the initial stages of wustite reduction, the activation energy values were calculated to be in the range of 251–335 kJ mol−1 for all carbon-bearing materials.

sted, utgiver, år, opplag, sider
Taylor & Francis, 2017. Vol. 44, nr 1, s. 66-75
HSV kategori
Forskningsprogram
Processmetallurgi
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URN: urn:nbn:se:ltu:diva-15632DOI: 10.1080/03019233.2016.1165497ISI: 000396712800010Scopus ID: 2-s2.0-84978512250Lokal ID: f2a254cc-072d-4113-99c6-307f557fb0bbOAI: oai:DiVA.org:ltu-15632DiVA, id: diva2:988607
Merknad

Validerad; 2017; Nivå 2; 2016-12-20 (andbra)

Tilgjengelig fra: 2016-09-29 Laget: 2016-09-29 Sist oppdatert: 2018-11-19bibliografisk kontrollert

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