The kinetics of zinc silicate leaching in sodium hydroxide.

Detalhes bibliográficos
Autor(a) principal: Santos, Fabiano Mariel Fernandes dos
Data de Publicação: 2010
Outros Autores: Pina, Pablo dos Santos, Porcaro, Rodrigo Rangel, Oliveira, Víctor de Andrade Alvarenga, Silva, Carlos Antônio da, Leão, Versiane Albis
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFOP
Texto Completo: http://www.repositorio.ufop.br/handle/123456789/1229
Resumo: The alkaline leaching kinetics of a zinc silicate ore assaying 34.1% Zn, 11.1% Fe and 22.9% SiO2 is studied in sodium hydroxide solutions. Speciation diagrams indicate zinc dissolution as [Zn(OH)4]2− and SEM analysis showed a progressive reduction in particle size during leaching which supports the shrinking particle model. The process is chemically controlled with an activation energy of 67.8±9.0 kJ/mol and reaction order with respect to NaOH determined as 1.44±0.46.
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spelling Santos, Fabiano Mariel Fernandes dosPina, Pablo dos SantosPorcaro, Rodrigo RangelOliveira, Víctor de Andrade AlvarengaSilva, Carlos Antônio daLeão, Versiane Albis2012-08-02T17:07:05Z2012-08-02T17:07:05Z2010SANTOS, F. M. F. et al. The kinetics of zinc silicate leaching in sodium hydroxide. Hydrometallurgy, v. 102, n. 1-4, p. 43-49, abr. 2010. Disponível em: <https://www.sciencedirect.com/science/article/pii/S0304386X10000241>. Acesso em: 02 ago. 2012.0304386Xhttp://www.repositorio.ufop.br/handle/123456789/1229The alkaline leaching kinetics of a zinc silicate ore assaying 34.1% Zn, 11.1% Fe and 22.9% SiO2 is studied in sodium hydroxide solutions. Speciation diagrams indicate zinc dissolution as [Zn(OH)4]2− and SEM analysis showed a progressive reduction in particle size during leaching which supports the shrinking particle model. The process is chemically controlled with an activation energy of 67.8±9.0 kJ/mol and reaction order with respect to NaOH determined as 1.44±0.46.Zinc silicateSodium hydroxideLeaching kineticsShrinking particle modelChemical controlThe kinetics of zinc silicate leaching in sodium hydroxide.info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleO periódico Hydrometallurgy concede permissão para depósito do artigo no Repositório Institucional da UFOP. Número da licença: 3337021029066.info:eu-repo/semantics/openAccessengreponame:Repositório Institucional da UFOPinstname:Universidade Federal de Ouro Preto (UFOP)instacron:UFOPLICENSElicense.txtlicense.txttext/plain; charset=utf-81748http://www.repositorio.ufop.br/bitstream/123456789/1229/5/license.txt8a4605be74aa9ea9d79846c1fba20a33MD55ORIGINALARTIGO_KineticsZincSilicate.pdfARTIGO_KineticsZincSilicate.pdfapplication/pdf985342http://www.repositorio.ufop.br/bitstream/123456789/1229/1/ARTIGO_KineticsZincSilicate.pdf49a92a450f23e1014d8bb798f16ed887MD51123456789/12292020-09-08 17:34:36.426oai:localhost: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Repositório InstitucionalPUBhttp://www.repositorio.ufop.br/oai/requestrepositorio@ufop.edu.bropendoar:32332020-09-08T21:34:36Repositório Institucional da UFOP - Universidade Federal de Ouro Preto (UFOP)false
dc.title.pt_BR.fl_str_mv The kinetics of zinc silicate leaching in sodium hydroxide.
title The kinetics of zinc silicate leaching in sodium hydroxide.
spellingShingle The kinetics of zinc silicate leaching in sodium hydroxide.
Santos, Fabiano Mariel Fernandes dos
Zinc silicate
Sodium hydroxide
Leaching kinetics
Shrinking particle model
Chemical control
title_short The kinetics of zinc silicate leaching in sodium hydroxide.
title_full The kinetics of zinc silicate leaching in sodium hydroxide.
title_fullStr The kinetics of zinc silicate leaching in sodium hydroxide.
title_full_unstemmed The kinetics of zinc silicate leaching in sodium hydroxide.
title_sort The kinetics of zinc silicate leaching in sodium hydroxide.
author Santos, Fabiano Mariel Fernandes dos
author_facet Santos, Fabiano Mariel Fernandes dos
Pina, Pablo dos Santos
Porcaro, Rodrigo Rangel
Oliveira, Víctor de Andrade Alvarenga
Silva, Carlos Antônio da
Leão, Versiane Albis
author_role author
author2 Pina, Pablo dos Santos
Porcaro, Rodrigo Rangel
Oliveira, Víctor de Andrade Alvarenga
Silva, Carlos Antônio da
Leão, Versiane Albis
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Santos, Fabiano Mariel Fernandes dos
Pina, Pablo dos Santos
Porcaro, Rodrigo Rangel
Oliveira, Víctor de Andrade Alvarenga
Silva, Carlos Antônio da
Leão, Versiane Albis
dc.subject.por.fl_str_mv Zinc silicate
Sodium hydroxide
Leaching kinetics
Shrinking particle model
Chemical control
topic Zinc silicate
Sodium hydroxide
Leaching kinetics
Shrinking particle model
Chemical control
description The alkaline leaching kinetics of a zinc silicate ore assaying 34.1% Zn, 11.1% Fe and 22.9% SiO2 is studied in sodium hydroxide solutions. Speciation diagrams indicate zinc dissolution as [Zn(OH)4]2− and SEM analysis showed a progressive reduction in particle size during leaching which supports the shrinking particle model. The process is chemically controlled with an activation energy of 67.8±9.0 kJ/mol and reaction order with respect to NaOH determined as 1.44±0.46.
publishDate 2010
dc.date.issued.fl_str_mv 2010
dc.date.accessioned.fl_str_mv 2012-08-02T17:07:05Z
dc.date.available.fl_str_mv 2012-08-02T17:07:05Z
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 SANTOS, F. M. F. et al. The kinetics of zinc silicate leaching in sodium hydroxide. Hydrometallurgy, v. 102, n. 1-4, p. 43-49, abr. 2010. Disponível em: <https://www.sciencedirect.com/science/article/pii/S0304386X10000241>. Acesso em: 02 ago. 2012.
dc.identifier.uri.fl_str_mv http://www.repositorio.ufop.br/handle/123456789/1229
dc.identifier.issn.none.fl_str_mv 0304386X
identifier_str_mv SANTOS, F. M. F. et al. The kinetics of zinc silicate leaching in sodium hydroxide. Hydrometallurgy, v. 102, n. 1-4, p. 43-49, abr. 2010. Disponível em: <https://www.sciencedirect.com/science/article/pii/S0304386X10000241>. Acesso em: 02 ago. 2012.
0304386X
url http://www.repositorio.ufop.br/handle/123456789/1229
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reponame_str Repositório Institucional da UFOP
collection Repositório Institucional da UFOP
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