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Investigation of direct reduction of lumps from natural hematite iron ore
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Applied Process Metallurgy. (Process Metallurgy)ORCID iD: 0000-0002-5223-7857
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Applied Process Metallurgy. (Process Metallurgy)
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Applied Process Metallurgy. (Process Metallurgy)
Makerere University, Kampala.
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2013 (English)In: Research and Application of Material, ISSN 2328-5079Article in journal (Other academic) Published
Abstract [en]

The effects of the main characteristics of hematite natural ore lumps such as weight and microstructure and the parameters of the direct reduction process (gas flow rate and temperature) on the reduction degree and thermo-mechanical degradation of iron ore lumps were investigated. Lumps from Muko deposit were used for direct reduction with H2/CO, ratio of 1.5. The temperature and gas flow rate ranged from 700-900°C and 0.25-1.0 L/min, respectively. The highest reduction degree (0.88-0.91) was obtained by direct reduction of 3-4 g samples at 900°C and 0.5 L/min. The effects of the flow rate of the reduction gas in the furnace and the carbon deposited on a sample surface on the accuracy of the weight measurement and the reduction degree by using the thermal gravimetric technique were estimated and discussed. It was further discovered that the natural microstructure of a lump iron ore has an effect on the reduction time.

Place, publisher, year, edition, pages
2013.
Keyword [en]
natural iron ore lumps, direct reduction, reduction behaviour, weight, microstructure, reduction degree
National Category
Other Materials Engineering
Identifiers
URN: urn:nbn:se:kth:diva-123061DOI: 10.12966/ram.09.03.2013OAI: oai:DiVA.org:kth-123061DiVA: diva2:624395
Projects
Sustainable Technology Development in the Lake Victoria Region
Funder
Sida - Swedish International Development Cooperation Agency, 5410004501
Note

QC 20150421

Available from: 2013-05-31 Created: 2013-05-31 Last updated: 2017-03-07Bibliographically approved

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Muwanguzi, Abraham Judah BumalirivuYunyun, WuAndrey, Karasev VPär, Jönsson G
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  • apa
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