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Quantitative image analysis of bubble cavities in iron ore green pellets
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.ORCID iD: 0000-0003-4582-0902
LKAB.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.
2011 (English)In: Powder Technology, ISSN 0032-5910, E-ISSN 1873-328X, Vol. 214, no 3, p. 306-312Article in journal (Refereed) Published
Abstract [en]

Scanning electron microscopy and image analysis was used for quantitative analysis of bubble cavities in iron ore green pellets. Two types of pellets prepared with and without addition of flotation reagent prior to balling were studied. The bubble cavity porosity amounted to 2.8% in the pellets prepared without addition of flotation reagent prior to balling. When flotation reagent was added prior to balling, the bubble cavity porosity increased by a factor of 2.4 and the median bubble diameter was decreased slightly. It was also shown that mercury intrusion porosimetry is not suitable for determination of the distribution of bubble cavities. Finally, our data suggested that the difference in total porosity determined by mercury intrusion porosimetry and pycnometry between the two types of pellets was due to the bubble cavities.

Place, publisher, year, edition, pages
2011. Vol. 214, no 3, p. 306-312
National Category
Chemical Process Engineering
Research subject
Chemical Technology
Identifiers
URN: urn:nbn:se:ltu:diva-11823DOI: 10.1016/j.powtec.2011.08.028ISI: 000297440500005Scopus ID: 2-s2.0-80054853424Local ID: ad6ad393-8fda-411f-9067-48bd67e18824OAI: oai:DiVA.org:ltu-11823DiVA, id: diva2:984773
Note
Validerad; 2011; 20110922 (ysko)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Bhuiyan, Iftekhar UddinMouzon, JohanneHedlund, Jonas

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