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Autordc.contributor.authorRamos, Jahir J. 
Autordc.contributor.authorLeiva, Williams H. 
Autordc.contributor.authorCastillo, Claudia N. 
Autordc.contributor.authorIhle Bascuñán, Christian 
Autordc.contributor.authorFawell, Phillip D. 
Autordc.contributor.authorJeldres, Ricardo I. 
Fecha ingresodc.date.accessioned2020-07-02T02:19:07Z
Fecha disponibledc.date.available2020-07-02T02:19:07Z
Fecha de publicacióndc.date.issued2020
Cita de ítemdc.identifier.citationMinerals Engineering 154 (2020) 106417es_ES
Identificadordc.identifier.other10.1016/j.mineng.2020.106417
Identificadordc.identifier.urihttps://repositorio.uchile.cl/handle/2250/175741
Resumendc.description.abstractIn areas where access to water of good quality is limited, the use of seawater in mineral processing can be an option. However, the dewatering of waste tailings is adversely affected, particularly when this follows processing at higher pH. The flocculation response of a synthetic clay-based tailings in seawater to different pH conditions was examined in detail, focusing on conditions promoting precipitation of the divalent cations present. Flocculated aggregate growth and breakage during turbine mixing were monitored in-situ in terms of chord length distributions (by focused beam reflectance measurement) and aggregate image capture, with the resultant hindered settling rates also determined. It was found that flocculation in seawater was substantially impaired at pH values greater than 10.3 due to the precipitation of magnesium species. The addition of the precipitated phase to the synthetic tailings increases both the surface area exposed to flocculant and the number of particles or micro-aggregates then needing further aggregation to attain acceptable settling rates. The direct use of seawater in processing operations without resorting to full desalination does not necessarily have detrimental impacts on tailings flocculation and thickening, provided the operation is conducted at a pH that prevents the precipitation of magnesium present within the process liquors.es_ES
Patrocinadordc.description.sponsorshipComision Nacional de Investigacion Cientifica y Tecnologica (CONICYT) CONICYT FONDECYT 1160971 11171036 CONICYT PIA ACM 170005 CONICYT/PIA Project AFB180004 Centro CRHIAM Project Anid/Fondap/15130015es_ES
Idiomadc.language.isoenes_ES
Publicadordc.publisherElsevieres_ES
Tipo de licenciadc.rightsAttribution-NonCommercial-NoDerivs 3.0 Chile*
Link a Licenciadc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/cl/*
Fuentedc.sourceMinerals Engineeringes_ES
Palabras clavesdc.subjectSeawater flocculationes_ES
Palabras clavesdc.subjectMining wastees_ES
Palabras clavesdc.subjectClay-based tailinges_ES
Palabras clavesdc.subjectPolyacrylamidees_ES
Palabras clavesdc.subjectHydrolyzed magnesium complexes_ES
Títulodc.titleSeawater flocculation of clay-based mining tailings: Impact of calcium and magnesium precipitationes_ES
Tipo de documentodc.typeArtículo de revistaes_ES
dcterms.accessRightsdcterms.accessRightsAcceso Abierto
Catalogadoruchile.catalogadorlajes_ES
Indizaciónuchile.indexArtículo de publicación ISI
Indizaciónuchile.indexArtículo de publicación SCOPUS


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Attribution-NonCommercial-NoDerivs 3.0 Chile
Excepto si se señala otra cosa, la licencia del ítem se describe como Attribution-NonCommercial-NoDerivs 3.0 Chile