Bench-scale calcination and sintering of a goethite iron ore sample.

Detalhes bibliográficos
Autor(a) principal: Silva, Mônica Suede Santos
Data de Publicação: 2016
Outros Autores: Lima, Margarida Márcia Fernandes, Graça, Leonardo Martins, Lima, Rosa Malena Fernandes
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFOP
Texto Completo: http://www.repositorio.ufop.br/handle/123456789/6773
https://doi.org/10.1016/j.minpro.2016.03.008
Resumo: This work presents the results of bench calcination and sintering studies conducted on an iron ore sample from Iron Quadrangle, Brazil with high goethite content. The natural samples and the products of calcination and sinteringwere characterised by inductively coupled plasma optical emission spectroscopy (OES/ICP), X-ray spectrometry and gravimetric methods. Optical microscopy, X-ray diffraction (XRD) and scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM/EDS) were used to identify the phases in the studied samples. Density, specific surface area, specific pore volume and pore diameter were determined through gas pycnometry. All of the natural sinter feed samples had a Fe grade N64% and a very high phosphorus grade (~0.17%). After calcination, a 3.1–3.4% increase was observed in the Fe grade compared to that of the natural sinter feed samples. The average Fe grade of the sintered samples was 59.1%. The identified phases with XRD in the raw materials were hematite and goethite. In the calcined samples, only hematite was identified because of the thermal decomposition of goethite. The density, specific surface area, specific pore volume and pore diameter of the calcined samples increased compared to those of the natural sinter feed samples. Hematite, brownmillerite, anorthite, and gehlenite were identified in the sintered samples. The sites for phosphorus occurrence were calcium silicates and apatite. The sintered samples exhibited specific surface areas lower than those of the calcined samples. This result was ascribed to the destruction of the pore structure by the sintering process.No relationship between the proportions of nucleate, intermediate and agglomerate particles used inmixture of sinter testswith the results of microtumbler was identified.
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spelling Bench-scale calcination and sintering of a goethite iron ore sample.Iron oreGoethiteHematiteCalcinationSinteringThis work presents the results of bench calcination and sintering studies conducted on an iron ore sample from Iron Quadrangle, Brazil with high goethite content. The natural samples and the products of calcination and sinteringwere characterised by inductively coupled plasma optical emission spectroscopy (OES/ICP), X-ray spectrometry and gravimetric methods. Optical microscopy, X-ray diffraction (XRD) and scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM/EDS) were used to identify the phases in the studied samples. Density, specific surface area, specific pore volume and pore diameter were determined through gas pycnometry. All of the natural sinter feed samples had a Fe grade N64% and a very high phosphorus grade (~0.17%). After calcination, a 3.1–3.4% increase was observed in the Fe grade compared to that of the natural sinter feed samples. The average Fe grade of the sintered samples was 59.1%. The identified phases with XRD in the raw materials were hematite and goethite. In the calcined samples, only hematite was identified because of the thermal decomposition of goethite. The density, specific surface area, specific pore volume and pore diameter of the calcined samples increased compared to those of the natural sinter feed samples. Hematite, brownmillerite, anorthite, and gehlenite were identified in the sintered samples. The sites for phosphorus occurrence were calcium silicates and apatite. The sintered samples exhibited specific surface areas lower than those of the calcined samples. This result was ascribed to the destruction of the pore structure by the sintering process.No relationship between the proportions of nucleate, intermediate and agglomerate particles used inmixture of sinter testswith the results of microtumbler was identified.2016-08-09T19:41:07Z2016-08-09T19:41:07Z2016info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfSILVA, M. S. S. et al. Bench-scale calcination and sintering of a goethite iron ore sample. International Journal of Mineral Processing, p. 54-64, 2016. Disponível em: <http://www.sciencedirect.com/science/article/pii/S0301751616300461>. Acesso em: 11 jul. 2016.0301-7516http://www.repositorio.ufop.br/handle/123456789/6773https://doi.org/10.1016/j.minpro.2016.03.008O periódico International Journal of Mineral Processing concede permissão para depósito deste artigo no Repositório Institucional da UFOP. Número da licença: 3914191069141.info:eu-repo/semantics/openAccessSilva, Mônica Suede SantosLima, Margarida Márcia FernandesGraça, Leonardo MartinsLima, Rosa Malena Fernandesengreponame:Repositório Institucional da UFOPinstname:Universidade Federal de Ouro Preto (UFOP)instacron:UFOP2019-09-25T14:18:28Zoai:repositorio.ufop.br:123456789/6773Repositório InstitucionalPUBhttp://www.repositorio.ufop.br/oai/requestrepositorio@ufop.edu.bropendoar:32332019-09-25T14:18:28Repositório Institucional da UFOP - Universidade Federal de Ouro Preto (UFOP)false
dc.title.none.fl_str_mv Bench-scale calcination and sintering of a goethite iron ore sample.
title Bench-scale calcination and sintering of a goethite iron ore sample.
spellingShingle Bench-scale calcination and sintering of a goethite iron ore sample.
Silva, Mônica Suede Santos
Iron ore
Goethite
Hematite
Calcination
Sintering
title_short Bench-scale calcination and sintering of a goethite iron ore sample.
title_full Bench-scale calcination and sintering of a goethite iron ore sample.
title_fullStr Bench-scale calcination and sintering of a goethite iron ore sample.
title_full_unstemmed Bench-scale calcination and sintering of a goethite iron ore sample.
title_sort Bench-scale calcination and sintering of a goethite iron ore sample.
author Silva, Mônica Suede Santos
author_facet Silva, Mônica Suede Santos
Lima, Margarida Márcia Fernandes
Graça, Leonardo Martins
Lima, Rosa Malena Fernandes
author_role author
author2 Lima, Margarida Márcia Fernandes
Graça, Leonardo Martins
Lima, Rosa Malena Fernandes
author2_role author
author
author
dc.contributor.author.fl_str_mv Silva, Mônica Suede Santos
Lima, Margarida Márcia Fernandes
Graça, Leonardo Martins
Lima, Rosa Malena Fernandes
dc.subject.por.fl_str_mv Iron ore
Goethite
Hematite
Calcination
Sintering
topic Iron ore
Goethite
Hematite
Calcination
Sintering
description This work presents the results of bench calcination and sintering studies conducted on an iron ore sample from Iron Quadrangle, Brazil with high goethite content. The natural samples and the products of calcination and sinteringwere characterised by inductively coupled plasma optical emission spectroscopy (OES/ICP), X-ray spectrometry and gravimetric methods. Optical microscopy, X-ray diffraction (XRD) and scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM/EDS) were used to identify the phases in the studied samples. Density, specific surface area, specific pore volume and pore diameter were determined through gas pycnometry. All of the natural sinter feed samples had a Fe grade N64% and a very high phosphorus grade (~0.17%). After calcination, a 3.1–3.4% increase was observed in the Fe grade compared to that of the natural sinter feed samples. The average Fe grade of the sintered samples was 59.1%. The identified phases with XRD in the raw materials were hematite and goethite. In the calcined samples, only hematite was identified because of the thermal decomposition of goethite. The density, specific surface area, specific pore volume and pore diameter of the calcined samples increased compared to those of the natural sinter feed samples. Hematite, brownmillerite, anorthite, and gehlenite were identified in the sintered samples. The sites for phosphorus occurrence were calcium silicates and apatite. The sintered samples exhibited specific surface areas lower than those of the calcined samples. This result was ascribed to the destruction of the pore structure by the sintering process.No relationship between the proportions of nucleate, intermediate and agglomerate particles used inmixture of sinter testswith the results of microtumbler was identified.
publishDate 2016
dc.date.none.fl_str_mv 2016-08-09T19:41:07Z
2016-08-09T19:41:07Z
2016
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 SILVA, M. S. S. et al. Bench-scale calcination and sintering of a goethite iron ore sample. International Journal of Mineral Processing, p. 54-64, 2016. Disponível em: <http://www.sciencedirect.com/science/article/pii/S0301751616300461>. Acesso em: 11 jul. 2016.
0301-7516
http://www.repositorio.ufop.br/handle/123456789/6773
https://doi.org/10.1016/j.minpro.2016.03.008
identifier_str_mv SILVA, M. S. S. et al. Bench-scale calcination and sintering of a goethite iron ore sample. International Journal of Mineral Processing, p. 54-64, 2016. Disponível em: <http://www.sciencedirect.com/science/article/pii/S0301751616300461>. Acesso em: 11 jul. 2016.
0301-7516
url http://www.repositorio.ufop.br/handle/123456789/6773
https://doi.org/10.1016/j.minpro.2016.03.008
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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