The use of diffuse reflectance spectroscopy for the characterization of iron ores.

The aim of this work was to develop a diffuse reflectance methodology for quantifying minerals in powdered iron ores, which is a key quality control requirement for these materials. Selected samples ranging widely in their concentrations of hematite (as specularite and martite), goethite, magnetite,...

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Detalles Bibliográficos
Autores: Costa, Geraldo Magela da, Barrón, Vidal, Ferreira, César Mendonça, Torrent, José
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2009
País:Brasil
Institución:Universidade Federal de Ouro Preto (UFOP)
Repositorio:Repositório Institucional da UFOP
Idioma:inglés
OAI Identifier:oai:repositorio.ufop.br:123456789/2052
Acceso en línea:http://www.repositorio.ufop.br/handle/123456789/2052
Access Level:acceso abierto
Palabra clave:Iron ores
Goethite
Martite
Specularite
Reflectance
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spelling The use of diffuse reflectance spectroscopy for the characterization of iron ores.Iron oresGoethiteMartiteSpeculariteReflectanceThe aim of this work was to develop a diffuse reflectance methodology for quantifying minerals in powdered iron ores, which is a key quality control requirement for these materials. Selected samples ranging widely in their concentrations of hematite (as specularite and martite), goethite, magnetite, and quartz were collected in mines from the Iron Quadrangle, Minas Gerais State, and also in the Carajás region, Pará State, Brazil. A chemometric analysis based on the concentrations of the different minerals as determined with a combination of conventional methods (chemical analysis, X-ray diffraction, Mössbauer spectroscopy, light-reflected microscopy, and magnetic susceptibility) and the principal components derived from the diffuse reflectance spectra in the visible range was performed. Principal component regression analysis provided successful calibration for the concentrations of goethite (r2 = 0.94; standard error of validation (SEv) = 4.2%) and hematite (r2 = 0.89; SEv = 7.4%), in addition to good estimates for quartz (r2 = 0.83; SEv = 7.4%), specularite (r2 = 0.80; SEv = 11.6%), and martite (r2 = 0.78; SEv = 10.6%). Our results suggest that diffuse reflectance spectroscopy is a promising tool for the simultaneous determination of minerals in iron ores within a few minutes only.2013-01-28T12:48:54Z2013-01-28T12:48:54Z2009info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfCOSTA, G. M. et al. The use of diffuse reflectance spectroscopy for the characterization of iron ores. Minerals Engineering, v. 22, n.14, p. 1245-1250, 2009. Disponível em: <https://www.sciencedirect.com/science/article/pii/S0892687509001587>. Acesso em: 28 jan. 2013.08926875http://www.repositorio.ufop.br/handle/123456789/2052ark:/61566/0013000008qgdO periódico Minerals Engineering concede permissão para depósito deste artigo no Repositório Institucional da UFOP. Número da licença: 3313110289313.info:eu-repo/semantics/openAccessengreponame:Repositório Institucional da UFOPinstname:Universidade Federal de Ouro Preto (UFOP)instacron:UFOPCosta, Geraldo Magela daBarrón, VidalFerreira, César MendonçaTorrent, José2024-11-10T20:08:09Zoai:repositorio.ufop.br:123456789/2052Repositório InstitucionalPUBhttp://www.repositorio.ufop.br/oai/requestrepositorio@ufop.edu.bropendoar:32332024-11-10T20:08:09Repositório Institucional da UFOP - Universidade Federal de Ouro Preto (UFOP)false
dc.title.none.fl_str_mv The use of diffuse reflectance spectroscopy for the characterization of iron ores.
title The use of diffuse reflectance spectroscopy for the characterization of iron ores.
spellingShingle The use of diffuse reflectance spectroscopy for the characterization of iron ores.
Costa, Geraldo Magela da
Iron ores
Goethite
Martite
Specularite
Reflectance
title_short The use of diffuse reflectance spectroscopy for the characterization of iron ores.
title_full The use of diffuse reflectance spectroscopy for the characterization of iron ores.
title_fullStr The use of diffuse reflectance spectroscopy for the characterization of iron ores.
title_full_unstemmed The use of diffuse reflectance spectroscopy for the characterization of iron ores.
title_sort The use of diffuse reflectance spectroscopy for the characterization of iron ores.
dc.creator.none.fl_str_mv Costa, Geraldo Magela da
Barrón, Vidal
Ferreira, César Mendonça
Torrent, José
author Costa, Geraldo Magela da
author_facet Costa, Geraldo Magela da
Barrón, Vidal
Ferreira, César Mendonça
Torrent, José
author_role author
author2 Barrón, Vidal
Ferreira, César Mendonça
Torrent, José
author2_role author
author
author
dc.subject.por.fl_str_mv Iron ores
Goethite
Martite
Specularite
Reflectance
topic Iron ores
Goethite
Martite
Specularite
Reflectance
description The aim of this work was to develop a diffuse reflectance methodology for quantifying minerals in powdered iron ores, which is a key quality control requirement for these materials. Selected samples ranging widely in their concentrations of hematite (as specularite and martite), goethite, magnetite, and quartz were collected in mines from the Iron Quadrangle, Minas Gerais State, and also in the Carajás region, Pará State, Brazil. A chemometric analysis based on the concentrations of the different minerals as determined with a combination of conventional methods (chemical analysis, X-ray diffraction, Mössbauer spectroscopy, light-reflected microscopy, and magnetic susceptibility) and the principal components derived from the diffuse reflectance spectra in the visible range was performed. Principal component regression analysis provided successful calibration for the concentrations of goethite (r2 = 0.94; standard error of validation (SEv) = 4.2%) and hematite (r2 = 0.89; SEv = 7.4%), in addition to good estimates for quartz (r2 = 0.83; SEv = 7.4%), specularite (r2 = 0.80; SEv = 11.6%), and martite (r2 = 0.78; SEv = 10.6%). Our results suggest that diffuse reflectance spectroscopy is a promising tool for the simultaneous determination of minerals in iron ores within a few minutes only.
publishDate 2009
dc.date.none.fl_str_mv 2009
2013-01-28T12:48:54Z
2013-01-28T12:48:54Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv COSTA, G. M. et al. The use of diffuse reflectance spectroscopy for the characterization of iron ores. Minerals Engineering, v. 22, n.14, p. 1245-1250, 2009. Disponível em: <https://www.sciencedirect.com/science/article/pii/S0892687509001587>. Acesso em: 28 jan. 2013.
08926875
http://www.repositorio.ufop.br/handle/123456789/2052
dc.identifier.dark.fl_str_mv ark:/61566/0013000008qgd
identifier_str_mv COSTA, G. M. et al. The use of diffuse reflectance spectroscopy for the characterization of iron ores. Minerals Engineering, v. 22, n.14, p. 1245-1250, 2009. Disponível em: <https://www.sciencedirect.com/science/article/pii/S0892687509001587>. Acesso em: 28 jan. 2013.
08926875
ark:/61566/0013000008qgd
url http://www.repositorio.ufop.br/handle/123456789/2052
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFOP
instname:Universidade Federal de Ouro Preto (UFOP)
instacron:UFOP
instname_str Universidade Federal de Ouro Preto (UFOP)
instacron_str UFOP
institution UFOP
reponame_str Repositório Institucional da UFOP
collection Repositório Institucional da UFOP
repository.name.fl_str_mv Repositório Institucional da UFOP - Universidade Federal de Ouro Preto (UFOP)
repository.mail.fl_str_mv repositorio@ufop.edu.br
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score 15.301603

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