Dispersion degree and zeta potential of hematite.
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFOP |
Texto Completo: | http://www.repositorio.ufop.br/handle/123456789/9066 https://doi.org/10.1590/0370-44672014690073 |
Resumo: | The dispersion degree of the mineral particles in the pulp is especially relevant regarding the performance of the cationic reverse flotation of iron ores. The gangue minerals should remain dispersed while hematite particles should be selectively flocculated. The present study addressed determinations of dispersion degree and zeta potential of hematite in the presence of different dispersants, classified as organic polymeric (natural and synthetic), organic monomeric, and inorganic. Special attention was paid to results achieved at pH 10, used in plant practice. For natural organic polymers, correlation was observed between the dispersion degree and the increase in the negative value of zeta potential. Some synthetic organic polymers enhance the dispersion of hematite particles despite not affecting significantly the zeta potential. Sodium silicates, irrespectively of the SiO2/Na2O ratio, at pH 10, did not impact significantly either the dispersion degree or the zeta potential. |
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Alexandrino, Júnia SoaresPeres, Antônio Eduardo ClarkLopes, Gilmara MendonçaRodrigues, Otávia Martins Silva2017-10-30T12:07:52Z2017-10-30T12:07:52Z2016ALEXANDRINO, J. S. et al. Dispersion degree and zeta potential of hematite. REM - International Engineering Journal, v. 69, p. 193-198, 2016. Disponível em: <http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0370-44672016000200193>. Acesso em: 25 ago. 2017.1807-0360http://www.repositorio.ufop.br/handle/123456789/9066https://doi.org/10.1590/0370-44672014690073The dispersion degree of the mineral particles in the pulp is especially relevant regarding the performance of the cationic reverse flotation of iron ores. The gangue minerals should remain dispersed while hematite particles should be selectively flocculated. The present study addressed determinations of dispersion degree and zeta potential of hematite in the presence of different dispersants, classified as organic polymeric (natural and synthetic), organic monomeric, and inorganic. Special attention was paid to results achieved at pH 10, used in plant practice. For natural organic polymers, correlation was observed between the dispersion degree and the increase in the negative value of zeta potential. Some synthetic organic polymers enhance the dispersion of hematite particles despite not affecting significantly the zeta potential. Sodium silicates, irrespectively of the SiO2/Na2O ratio, at pH 10, did not impact significantly either the dispersion degree or the zeta potential.A REM - International Engineering Journal - autoriza o depósito de cópia de artigos dos professores e alunos da UFOP no Repositório Institucional da UFOP. Licença concedida mediante preenchimento de formulário online em 12 set. 2013.info:eu-repo/semantics/openAccessDispersion degreeZeta potentialHematiteDispersantsDispersion degree and zeta potential of hematite.info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleengreponame:Repositório Institucional da UFOPinstname:Universidade Federal de Ouro Preto (UFOP)instacron:UFOPLICENSElicense.txtlicense.txttext/plain; charset=utf-8924http://www.repositorio.ufop.br/bitstream/123456789/9066/2/license.txt62604f8d955274beb56c80ce1ee5dcaeMD52ORIGINALARTIGO_DispersionDegreeZeta.pdfARTIGO_DispersionDegreeZeta.pdfapplication/pdf1112816http://www.repositorio.ufop.br/bitstream/123456789/9066/1/ARTIGO_DispersionDegreeZeta.pdfd4fe92ea48f6a6a4cf94e7f96a881af5MD51123456789/90662020-02-18 07:00:59.186oai:localhost: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ório InstitucionalPUBhttp://www.repositorio.ufop.br/oai/requestrepositorio@ufop.edu.bropendoar:32332020-02-18T12:00:59Repositório Institucional da UFOP - Universidade Federal de Ouro Preto (UFOP)false |
dc.title.pt_BR.fl_str_mv |
Dispersion degree and zeta potential of hematite. |
title |
Dispersion degree and zeta potential of hematite. |
spellingShingle |
Dispersion degree and zeta potential of hematite. Alexandrino, Júnia Soares Dispersion degree Zeta potential Hematite Dispersants |
title_short |
Dispersion degree and zeta potential of hematite. |
title_full |
Dispersion degree and zeta potential of hematite. |
title_fullStr |
Dispersion degree and zeta potential of hematite. |
title_full_unstemmed |
Dispersion degree and zeta potential of hematite. |
title_sort |
Dispersion degree and zeta potential of hematite. |
author |
Alexandrino, Júnia Soares |
author_facet |
Alexandrino, Júnia Soares Peres, Antônio Eduardo Clark Lopes, Gilmara Mendonça Rodrigues, Otávia Martins Silva |
author_role |
author |
author2 |
Peres, Antônio Eduardo Clark Lopes, Gilmara Mendonça Rodrigues, Otávia Martins Silva |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Alexandrino, Júnia Soares Peres, Antônio Eduardo Clark Lopes, Gilmara Mendonça Rodrigues, Otávia Martins Silva |
dc.subject.por.fl_str_mv |
Dispersion degree Zeta potential Hematite Dispersants |
topic |
Dispersion degree Zeta potential Hematite Dispersants |
description |
The dispersion degree of the mineral particles in the pulp is especially relevant regarding the performance of the cationic reverse flotation of iron ores. The gangue minerals should remain dispersed while hematite particles should be selectively flocculated. The present study addressed determinations of dispersion degree and zeta potential of hematite in the presence of different dispersants, classified as organic polymeric (natural and synthetic), organic monomeric, and inorganic. Special attention was paid to results achieved at pH 10, used in plant practice. For natural organic polymers, correlation was observed between the dispersion degree and the increase in the negative value of zeta potential. Some synthetic organic polymers enhance the dispersion of hematite particles despite not affecting significantly the zeta potential. Sodium silicates, irrespectively of the SiO2/Na2O ratio, at pH 10, did not impact significantly either the dispersion degree or the zeta potential. |
publishDate |
2016 |
dc.date.issued.fl_str_mv |
2016 |
dc.date.accessioned.fl_str_mv |
2017-10-30T12:07:52Z |
dc.date.available.fl_str_mv |
2017-10-30T12:07:52Z |
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.citation.fl_str_mv |
ALEXANDRINO, J. S. et al. Dispersion degree and zeta potential of hematite. REM - International Engineering Journal, v. 69, p. 193-198, 2016. Disponível em: <http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0370-44672016000200193>. Acesso em: 25 ago. 2017. |
dc.identifier.uri.fl_str_mv |
http://www.repositorio.ufop.br/handle/123456789/9066 |
dc.identifier.issn.none.fl_str_mv |
1807-0360 |
dc.identifier.doi.none.fl_str_mv |
https://doi.org/10.1590/0370-44672014690073 |
identifier_str_mv |
ALEXANDRINO, J. S. et al. Dispersion degree and zeta potential of hematite. REM - International Engineering Journal, v. 69, p. 193-198, 2016. Disponível em: <http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0370-44672016000200193>. Acesso em: 25 ago. 2017. 1807-0360 |
url |
http://www.repositorio.ufop.br/handle/123456789/9066 https://doi.org/10.1590/0370-44672014690073 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
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openAccess |
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