Quantification of moisture contents in iron and manganese ores.

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dc.contributor.authorCosta, Geraldo Magela da
dc.contributor.authorNovack, Kátia Monteiro
dc.contributor.authorElias, Megg Madonyk Cota
dc.contributor.authorCunha, Camila Cristina Rodrigues Ferreira da
dc.date.accessioned2017-05-25T12:33:32Z
dc.date.available2017-05-25T12:33:32Z
dc.date.issued2013
dc.description.abstractThe moisture contents of several synthetic and natural goethite-bearing samples were determined by the loss-of-mass method and by the Karl-Fischer titration. It was found that drying at 105°C did not remove all the water from these samples, and that temperatures above 200°C would be required to completely remove the adsorbed water. The multiple peaks observed in the TGA and DSC measurements are not due to the dehydroxylation of goethite, but are due to the release of adsorbed water. The decomposition of goethite into hematite occurs with the release of adsorbed water from room temperature up to the onset of the main dehydroxylation peak. The dehydroxylation occurs in a broad range of temperatures due to the existence of a particle-size distribution, surface hydroxyls and formation of a hematite coating. The determination of all adsorbed water is best performed by adding the powdered sample into the Karl- Fischer reaction vessel.pt_BR
dc.identifier.citationCOSTA, G. M. da et al. Quantification of moisture contents in iron and manganese ores. ISIJ International, v. 53, p. 1732-1738, 2013. Disponível em: <https://www.jstage.jst.go.jp/article/isijinternational/53/10/53_1732/_pdf>. Acesso em: 20 abr. 2017.pt_BR
dc.identifier.doihttp://dx.doi.org/10.2355/isijinternational.53.1732
dc.identifier.issn1347-5460
dc.identifier.urihttp://www.repositorio.ufop.br/handle/123456789/7804
dc.identifier.uri2https://www.jstage.jst.go.jp/article/isijinternational/53/10/53_1732/_pdfpt_BR
dc.language.isoen_USpt_BR
dc.rightsrestritopt_BR
dc.subjectMoisturept_BR
dc.subjectWater contentpt_BR
dc.subjectIron orept_BR
dc.titleQuantification of moisture contents in iron and manganese ores.pt_BR
dc.typeArtigo publicado em periodicopt_BR
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