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Reduction kinetics of commercial haematite pellet in a fixed bed at 1123-1273 K
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering. Northern Research Institute Narvik, Norway.
2016 (English)In: Ironmaking & steelmaking, ISSN 0301-9233, E-ISSN 1743-2812, Vol. 43, no 5, 394-402 p.Article in journal (Refereed) Published
Abstract [en]

In the present study a model for future use in the modelling of moving bed direct reduction reactors has been developed. The model of a fixed bed reactor for the production of sponge iron from haematite incorporates both heat-and mass-transfer, as well as the chemical reduction rate. The model results were compared to the experimental data obtained from a lab scale reactor in the temperature range 1123-1273 K, as well as to the output from a simple model assuming isothermal conditions. The H-2/CO ratio (beta) of the reducing gas was in all cases varied from 0.8 to 2.0. Overall the non-isothermal model developed permits a more accurate representation of the experimental data than the isothermal estimates, with a typical discrepancy of only 1.3%.

Place, publisher, year, edition, pages
Taylor & Francis, 2016. Vol. 43, no 5, 394-402 p.
Keyword [en]
Fixed bed, Shrinking Core Model, Gas-solid reaction, Heat transfer, Direct reduction, Kinetics, Haematite
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:kth:diva-191762DOI: 10.1080/03019233.2015.1104072ISI: 000380274000009ScopusID: 2-s2.0-84982291595OAI: oai:DiVA.org:kth-191762DiVA: diva2:957456
Note

QC 20160902

Available from: 2016-09-02 Created: 2016-09-02 Last updated: 2016-09-02Bibliographically approved

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Beheshti, Reza
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