A novel hydrometallurgical treatment for the recovery of copper, zinc, lead and silver from bulk concentrates

Nowadays sulphide ores exploitation is undergoing some troubles, which are hindering the treatment through traditional routes. Bulk flotation followed by a novel hydrometallurgical process can dodge these difficulties. In this work, an integral hydrometallurgical process consists of two ferric leach...

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Autores: Lorenzo Tallafigo, Juan, Romero Aleta, Rafael, Iglesias González, María Nieves, Mazuelos Rojas, Alfonso, Carranza Mora, Francisco
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2021
País:España
Institución:Universidad de Sevilla (US)
Repositorio:idUS. Depósito de Investigación de la Universidad de Sevilla
OAI Identifier:oai:idus.us.es:11441/152805
Acceso en línea:https://hdl.handle.net/11441/152805
https://doi.org/10.1016/j.hydromet.2020.105548
Access Level:acceso abierto
Palabra clave:Bulk sulphide concentrate
Ferric leaching
Catalysed leaching
Hot brine leaching
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spelling A novel hydrometallurgical treatment for the recovery of copper, zinc, lead and silver from bulk concentratesLorenzo Tallafigo, JuanRomero Aleta, RafaelIglesias González, María NievesMazuelos Rojas, AlfonsoRomero Aleta, RafaelCarranza Mora, FranciscoBulk sulphide concentrateFerric leachingCatalysed leachingHot brine leachingNowadays sulphide ores exploitation is undergoing some troubles, which are hindering the treatment through traditional routes. Bulk flotation followed by a novel hydrometallurgical process can dodge these difficulties. In this work, an integral hydrometallurgical process consists of two ferric leaching steps, followed by a hot brine leaching stage, is proposed to recover target metals from a bulk sulphide concentrate (2.9% Cu, 7.4% Zn, 2.5% Pb, 67 ppm Ag and 37.2% Fe). In the first ferric leaching step, sphalerite, galena and copper secondary sulphides are dissolved and, in the second leaching step, a silver salt is added in order to catalyse chalcopyrite oxidation. If silver salt is added at the beginning of the process, sphalerite passivation is observed, and therefore zinc recovery is not possible. However, when catalytic leaching is performed after a previous ferric leaching, copper and zinc recoveries higher than 95% are achieved. The leached concentrate (0.3% Cu, 0.8% Zn, 3.3% Pb, 1438 ppm Ag, 38.0% Fe and 6.6% S0 ), is treated by a hot brine leaching. When hot brine leaching is performed at high pulp density, elemental sulphur removal is necessary to recover all silver added as a catalyst. Extractions higher than 95% for Zn, Cu and Pb are achieved as well as the total recovery of catalyst. The proposed process is silver surplus; therefore, this agent can be recirculated.CLC Company - 2665/0124Universidad de Sevilla - VI PPITElsevierIngeniería QuímicaUniversidad de Sevilla2021info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionapplication/pdfapplication/pdfhttps://hdl.handle.net/11441/152805https://doi.org/10.1016/j.hydromet.2020.105548reponame:idUS. Depósito de Investigación de la Universidad de Sevillainstname:Universidad de Sevilla (US)InglésHydrometallurgy, 200, 105548.CLC 2665/0124USE VI PPIThttps://doi.org/10.1016/j.hydromet.2020.105548info:eu-repo/semantics/openAccessoai:idus.us.es:11441/1528052026-06-17T12:51:07Z
dc.title.none.fl_str_mv A novel hydrometallurgical treatment for the recovery of copper, zinc, lead and silver from bulk concentrates
title A novel hydrometallurgical treatment for the recovery of copper, zinc, lead and silver from bulk concentrates
spellingShingle A novel hydrometallurgical treatment for the recovery of copper, zinc, lead and silver from bulk concentrates
Lorenzo Tallafigo, Juan
Bulk sulphide concentrate
Ferric leaching
Catalysed leaching
Hot brine leaching
title_short A novel hydrometallurgical treatment for the recovery of copper, zinc, lead and silver from bulk concentrates
title_full A novel hydrometallurgical treatment for the recovery of copper, zinc, lead and silver from bulk concentrates
title_fullStr A novel hydrometallurgical treatment for the recovery of copper, zinc, lead and silver from bulk concentrates
title_full_unstemmed A novel hydrometallurgical treatment for the recovery of copper, zinc, lead and silver from bulk concentrates
title_sort A novel hydrometallurgical treatment for the recovery of copper, zinc, lead and silver from bulk concentrates
dc.creator.none.fl_str_mv Lorenzo Tallafigo, Juan
Romero Aleta, Rafael
Iglesias González, María Nieves
Mazuelos Rojas, Alfonso
Romero Aleta, Rafael
Carranza Mora, Francisco
author Lorenzo Tallafigo, Juan
author_facet Lorenzo Tallafigo, Juan
Romero Aleta, Rafael
Iglesias González, María Nieves
Mazuelos Rojas, Alfonso
Carranza Mora, Francisco
author_role author
author2 Romero Aleta, Rafael
Iglesias González, María Nieves
Mazuelos Rojas, Alfonso
Carranza Mora, Francisco
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Ingeniería Química
Universidad de Sevilla
dc.subject.none.fl_str_mv Bulk sulphide concentrate
Ferric leaching
Catalysed leaching
Hot brine leaching
topic Bulk sulphide concentrate
Ferric leaching
Catalysed leaching
Hot brine leaching
description Nowadays sulphide ores exploitation is undergoing some troubles, which are hindering the treatment through traditional routes. Bulk flotation followed by a novel hydrometallurgical process can dodge these difficulties. In this work, an integral hydrometallurgical process consists of two ferric leaching steps, followed by a hot brine leaching stage, is proposed to recover target metals from a bulk sulphide concentrate (2.9% Cu, 7.4% Zn, 2.5% Pb, 67 ppm Ag and 37.2% Fe). In the first ferric leaching step, sphalerite, galena and copper secondary sulphides are dissolved and, in the second leaching step, a silver salt is added in order to catalyse chalcopyrite oxidation. If silver salt is added at the beginning of the process, sphalerite passivation is observed, and therefore zinc recovery is not possible. However, when catalytic leaching is performed after a previous ferric leaching, copper and zinc recoveries higher than 95% are achieved. The leached concentrate (0.3% Cu, 0.8% Zn, 3.3% Pb, 1438 ppm Ag, 38.0% Fe and 6.6% S0 ), is treated by a hot brine leaching. When hot brine leaching is performed at high pulp density, elemental sulphur removal is necessary to recover all silver added as a catalyst. Extractions higher than 95% for Zn, Cu and Pb are achieved as well as the total recovery of catalyst. The proposed process is silver surplus; therefore, this agent can be recirculated.
publishDate 2021
dc.date.none.fl_str_mv 2021
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/11441/152805
https://doi.org/10.1016/j.hydromet.2020.105548
url https://hdl.handle.net/11441/152805
https://doi.org/10.1016/j.hydromet.2020.105548
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Hydrometallurgy, 200, 105548.
CLC 2665/0124
USE VI PPIT
https://doi.org/10.1016/j.hydromet.2020.105548
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:idUS. Depósito de Investigación de la Universidad de Sevilla
instname:Universidad de Sevilla (US)
instname_str Universidad de Sevilla (US)
reponame_str idUS. Depósito de Investigación de la Universidad de Sevilla
collection idUS. Depósito de Investigación de la Universidad de Sevilla
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,301603

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