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Quantitative image analysis of bubble cavities in iron ore green pellets
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Industriell miljö- och processteknik.
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Industriell miljö- och processteknik.ORCID-id: 0000-0003-4582-0902
LKAB.
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Industriell miljö- och processteknik.
2011 (engelsk)Inngår i: Powder Technology, ISSN 0032-5910, E-ISSN 1873-328X, Vol. 214, nr 3, s. 306-312Artikkel i tidsskrift (Fagfellevurdert) 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.

sted, utgiver, år, opplag, sider
2011. Vol. 214, nr 3, s. 306-312
HSV kategori
Forskningsprogram
Kemisk teknologi
Identifikatorer
URN: urn:nbn:se:ltu:diva-11823DOI: 10.1016/j.powtec.2011.08.028ISI: 000297440500005Scopus ID: 2-s2.0-80054853424Lokal ID: ad6ad393-8fda-411f-9067-48bd67e18824OAI: oai:DiVA.org:ltu-11823DiVA, id: diva2:984773
Merknad
Validerad; 2011; 20110922 (ysko)Tilgjengelig fra: 2016-09-29 Laget: 2016-09-29 Sist oppdatert: 2018-07-10bibliografisk kontrollert

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