Use of humic substances in froth flotation processes

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dc.contributor.authorReyes-Bozo, Lorenzo
dc.contributor.authorVyhmeister, Eduardo
dc.contributor.authorGodoy-Faúndez, Alex
dc.contributor.authorHigueras, Pablo
dc.contributor.authorFúnez-Guerra, Carlos
dc.contributor.authorValdés-González, Héctor
dc.contributor.authorSalazar, José Luis
dc.contributor.authorHerrera-Urbina, Ronaldo
dc.date.accessioned2022-07-22T20:36:58Z
dc.date.available2022-07-22T20:36:58Z
dc.date.issued2019
dc.description.abstractContinual growing demand for metals in regular and emerging markets has led to an increasing use of chemicals and reagents in ore processing. This trend force to incur in an increasing use of commodities which inevitable leads to higher operational costs and environmental concern. The chemicals and reagents used in flotation processes especially invoke high costs of handling and disposal due to their hazardous nature, but until now, few studies have been carried out to seek possible alternatives. In order to develop a cheaper and greener processes, these hazardous materials should be replaced by more sustainable products, by-products, or wastes generated by other industries. Biosolids, cheaper and greener than chemical frothers and collectors, have been tested successfully in flotation processes. Studies of removal rates and froth flotation kinetics have been carried out independently, nevertheless a deeper understanding of the tradeoffs involved between the rates and kinetics should be obtained. This work evaluates the use of different collectors (conventional collector (CC), biosolids (and their main components), and mixtures of CC and biosolids main components) in the froth flotation of copper sulfide ores. Tests were carried out in Denver Cells, at fixed collector, frother, and pH levels, in order to estimate metallurgical and kinetic parameters. In rougher flotation tests, biosolids show to be the most efficient non-CCs, achieving Cu recoveries of 64.1%. CC achieved 76.2% Cu recoveries while none of the pure biosolids main components achieved Cu recoveries over 60%. In the kinetics studies, only the partial replacement of CC (by 50% of Humic Acids (HAs) or biosolids) allowed a similar copper recovery once compared with CC (~81% Cu to be obtained with a fast kinetic constant of ~0.88 min−1). For molybdenum, partial replacement of CC produced better recovery and kinetics constants (k of 0.83 min−1 and R∞ of 66.10% for 50% CC - 50% HAs; k of 0.90 min−1 and R∞ of 61.79% for 50% CC - 50% biosolids). Results show that different combinations of biosolids - CC or HAs - CC could achieve optimal flotation conditions. As evaluated, an optimal combinations would allow considerable reductions in energy and chemical consumption.es
dc.description.versionVersión Publicadaes
dc.identifier.citationLorenzo Reyes-Bozo, Eduardo Vyhmeister, Alex Godoy-Faúndez, Pablo Higueras, Carlos Fúnez-Guerra, Héctor Valdés-González, José Luis Salazar, Ronaldo Herrera-Urbina, Use of humic substances in froth flotation processes, Journal of Environmental Management, Volume 252, 2019, 109699, ISSN 0301-4797, https://doi.org/10.1016/j.jenvman.2019.109699.es
dc.identifier.urihttps://doi.org/10.1016/j.jenvman.2019.109699es
dc.identifier.urihttp://hdl.handle.net/11447/6386
dc.language.isoenes
dc.subjectFroth flotation collectorses
dc.subjectFlotation kineticses
dc.subjectCopper and molybdenum concentrateses
dc.subjectRecoveryes
dc.subjectBiosolids as ore collectores
dc.subjectGreen chemistryes
dc.titleUse of humic substances in froth flotation processeses
dc.typeArticlees
dcterms.sourceJournal of Environmental Managementes

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