Cupric chloride leaching of a complex copper/zinc/lead ore

Guy, S.; Broadbent, Chris; Lawson, G.J.; Jackson, Jason D.

doi:10.1016/0304-386x(83)90008-7

Cited by 30 publications

(8 citation statements)

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“…Este comportamiento se interpreta como debido a que es el ion Cu 2+ el que realiza el ataque de los sulfuras, siendo el papel del oxígeno el de regenerar el sistema mediante la oxidación del ion Cu + que se produce. La lixiviación de sulfuras con CuCl 2 ha sido muy estudiada en los últimos años (50)(51)(52)(53)(54)(55), aunque orientada a la lixiviación de calcopirita. A elevadas concentraciones de cloruros, el ataque de los sulfuras por los iones cúprico y férrico muestra grandes similitudes, siendo, en ambos casos, de naturaleza electroquímica (56 y 57).…”

Section: Cinética De La Lixiviación De La Esfalerita Antecedentesunclassified

Lixiviación oxidante de sulfuros complejos en soluciones de cloruro amónico: cinética de la lixiviación de la esfalerita

Limpo¹

1997

REVMETAL

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Lixiviación oxidante de sulfuros complejos en soluciones de cloruro amónico: cinética de la lixiviación de la esfalerita (#) J.L. Limpcr y Resumen Tras la revisión de las publicaciones recientes sobre la lixiviación de esfalerita en medio cloruro, se presentan los resultados obtenidos en el estudio de la cinética de la lixiviación oxidante con oxígeno de esfalerita en soluciones concentradas de cloruro amónico en presencia de ion cúprico. Este estudio se ha realizado sobre una esfalerita de gran pureza y un concentrado diferencial de cinc. En el intervalo de temperatura estudiado (80 a 130 °C) la disolución se produce de acuerdo con una cinética de control mixto según el modelo de "núcleo sin reaccionar", en el que tanto la difusión en la capa de azufre como la reacción química en el núcleo son etapas controlantes. La expresión matemática de este modelo es: [1-(1-X)Se ha estudiado la influencia que sobre la velocidad de reacción tiene la temperatura, tamaño de partícula y concentración de cúprico. Los valores de la energía de activación de da constante k r que se han obtenido para la esfalerita pura y el concentrado de cinc son, respectivamente, 66,4 y 67,6 kJ/mol. La velocidad de la disolución del cinc aumenta con la potencia 0,43 de la concentración de cúprico. Los resultados obtenidos de la influencia del tamaño de partícula (k T°c \/r 0 y Bocr 0 ), son los que teóricamente predice el modelo de control mixto, hecho que corrobora la validez de este modelo cinético.Palabras clave: Lixiviación. Esfalerita. Cinética. Medio cloruro amónico. Oxidizing leaching of complex sulphides in ammonium chloride: sphalerite leaching kinetics AbstractRecent studies on chloride leaching of sphalerite are rewieved. The kinetics of oxygen leaching of sphalerite in concentrated ammonium chloride solutions in the presence of cupric ion has been studied. A puré sphalerite and a zinc concéntrate have been tested. 80-130 °C temperature range, the dissolution occurred according to a mixed model which assumed both diffusion through sulfur layer and a surface reaction in the shrinking core model. This is described mathematically as: [1-(1-X)The effect of temperature, cupric concentration and particle size on the dissolution rate were determinated. The activation energy of the rate constant k r for the puré sphalerite and zinc concéntrate was found to be 66.4 and 67.6 kJ/mol respectively. The dissolution rate increased as the 0.43 power of the cupric cloride concentration. The results obtained for the effect of particle size show, such as it is predicted by the kinetic mixed model, that the rate constant k r is inversely related, and the parameter B is directly related, to particle radius.

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Section: Cinética De La Lixiviación De La Esfalerita Antecedentesunclassified

Lixiviación oxidante de sulfuros complejos en soluciones de cloruro amónico: cinética de la lixiviación de la esfalerita

Limpo¹

1997

REVMETAL

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“…PTFE). [14][15][16] Chloride salts, such as sodium or magnesium chloride, could be added to increase the total chloride concentration of the lixiviant and/or reduce the acid consumption (i.e. HCl).…”

Section: Introductionmentioning

confidence: 99%

Recovery of copper, zinc and lead from photovoltaic panel residue

et al. 2022

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“…[10] The upgrading of As-and Sb-bearing complex concentrates for further processing has been investigated through certain hydrometallurgical treatments. The concentrates were subjected to leaching environments such as acidic chloride [11][12][13][14][15][16] and alkaline sulfide [17][18][19][20] for selective dissolution of As and Sb. Alternatively, roasting of Cu-concentrates can also partially volatilize the impurity elements As and Sb.…”

Section: Introductionmentioning

confidence: 99%

A Mineralogical Investigation on Volatilization of Impurity Elements from Cu-Rich Polymetallic Concentrates During Roasting in Inert Atmosphere

Prasad

McElroy

Lennartsson

et al. 2021

Metall Mater Trans B

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Four different Cu-rich polymetallic concentrates are tested for volatilization of Sb and As during laboratory-scale roasting. The experiments are performed between 200 °C and 700 °C, at intervals of 100 °C and in an inert atmosphere. Sb volatilization is much less (maximum approximately 45 pct) than As volatilization (maximum approximately 95 pct) in these conditions at 700 °C. As volatilization is however limited from the concentrate having As mainly in a tetrahedrite solid solution ((Cu,Ag,Fe,Zn)12(Sb,As)4S13). Sb and As retained in the roasted calcine are found in the low-melting liquid phase, formed at approximately 500 °C. This melt phase gets enlarged and enriched in Sb with an increase in temperature. However, there is noticeable As volatilization from this melt phase with the temperature approaching 700 °C. Furthermore, there is an early and relatively high Sb volatilization from the concentrate having Sb substantially as gudmundite. Micron-scale elemental redistribution in gudmundite in the 350 °C roasted calcine confirms its transformation at this temperature. Other Sb minerals did not undergo any detectable transformation at this temperature, suggesting that the significant Sb volatilization starting between 300 °C and 400 °C was primarily from gudmundite. This benign attribute of gudmundite featured in this work in the context of roasting should also be relevant from the geometallurgical perspective during concentrate production, where concentrates bearing Sb are considered substandard for further Cu extraction irrespective of the Sb mineralogy.

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Cupric chloride leaching of a complex copper/zinc/lead ore

Cited by 30 publications

References 1 publication

Lixiviación oxidante de sulfuros complejos en soluciones de cloruro amónico: cinética de la lixiviación de la esfalerita

Lixiviación oxidante de sulfuros complejos en soluciones de cloruro amónico: cinética de la lixiviación de la esfalerita

Recovery of copper, zinc and lead from photovoltaic panel residue

A Mineralogical Investigation on Volatilization of Impurity Elements from Cu-Rich Polymetallic Concentrates During Roasting in Inert Atmosphere

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