Effect of a thermal pretreatment on dissolution kinetics of a limonitic lateriteore in chloride media

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dc.contributor.authorGarces-Grandaa, A.
dc.contributor.authorLapidusb, G.T.
dc.contributor.authorRestrepo-Baena, O.J.
dc.date.accessioned2022-09-28T19:46:24Z
dc.date.available2022-09-28T19:46:24Z
dc.date.issued2020
dc.description.abstractThe effect of a thermal pretreatment on the kinetic parameters and rate-controlling step for nickel leachingdissolution in hydrochloric acid‑sodium chloride solutions from a low–grade Colombian nickel laterite (1.15%Ni, 0.12% Co and 41.1% Fe), was evaluated. The mineralogical analysis showed that nickel is associated withiron in the form of hematite (Fe2O3) and goethite (FeOOH) within the calcined and uncalcined ore, respectively.The hydrochloric acid and total chloride ions concentrations, as well as the leaching temperature, were shown tohave a direct effect on nickel extraction. The experiments showed that ~92% of nickel can be dissolved afteronly 25 min in a 3 M HCl and 2 M NaCl solution when the leaching temperature was increased to 60 °C, after thesample had been previously calcined at 430 °C for 1 h. Nickel dissolution can be described by the chemicalreaction-controlled shrinking particle model for both the calcined and uncalcined sample with apparent acti-vation energies of 98 kJ/mol and 103 kJ/mol, respectively. This result suggests that a thermal pretreatmentstage does not affect the nickel reaction mechanism, although it may liberate the nickel within the lateritestructure.es_ES
dc.identifier.otherDUI: 2020.105428
dc.identifier.urihttps://hdl.handle.net/20.500.12536/1754
dc.language.isoenes_ES
dc.publisherHydrometallurgyes_ES
dc.sourceHydrometallurgyes_ES
dc.subjectNickeles_ES
dc.subjectColombian lateriteses_ES
dc.subjectHydrochloric acid leachinges_ES
dc.subjectAtmospheric leachinges_ES
dc.subjectDissolution kineticses_ES
dc.titleEffect of a thermal pretreatment on dissolution kinetics of a limonitic lateriteore in chloride mediaes_ES
dc.typeArtículoes_ES
uvm.carreraIngeniería Civil en Minases_ES
uvm.escuelaEscuela de Ingeniería y Negocioses_ES
uvm.indexWoSes_ES
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