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Reduction of commercial hematite pellet in isothermal fixed bed-experiments and numerical modelling
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering. Nothern Research Institute Narvik, Norway.
2016 (English)In: Ironmaking & steelmaking, ISSN 0301-9233, E-ISSN 1743-2812, Vol. 43, no 1, 31-38 p.Article in journal (Refereed) PublishedText
Abstract [en]

In the present work, fixed bed reduction experiments were conducted at 1173 K over a range of H-2/CO ratios from 0.8 to 2.0 and subsequently modelled numerically (R). The model consists of two one-dimensional, isothermal and time dependent models. The gas-solid reactions were kinetically modelled using a modified shrinking core approach, and the equations were solved using the commercial software COMSOL Multiphysics H. The simulation results agree with thermal gravity experimental data with an average difference of 2.5%. A sensitivity analysis was conducted using the numerical model to establish the optimum operational conditions. The effects of the reducing gas ratio and flow rate, pellet radius and porosity, and the total bed height on the overall degree of reduction were also investigated.

Place, publisher, year, edition, pages
Taylor & Francis, 2016. Vol. 43, no 1, 31-38 p.
Keyword [en]
Hematite, Gas-solid reaction, Mass transfer, Shrinking core model, Kinetics
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:kth:diva-183344DOI: 10.1179/1743281215Y.0000000046ISI: 000369983200005ScopusID: 2-s2.0-84961673951OAI: oai:DiVA.org:kth-183344DiVA: diva2:909582
Note

QC 20160307

Available from: 2016-03-07 Created: 2016-03-07 Last updated: 2016-03-18Bibliographically approved

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Beheshti, Reza
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