Upgrading of a chalcopyrite concentrate by reaction with copper(II) and sulfite / Adam J. Fischmann in Minerals engineering, Vol. 23 N° 9 (Août 2010)  

Public ISBD [article]  inMinerals engineering > Vol. 23 N° 9 (Août 2010) . - pp. 746–751 Titre : Upgrading of a chalcopyrite concentrate by reaction with copper(II) and sulfite : Unexpected formation of Chevreul’s salt, Cu2SO3·CuSO3·2H2O Type de document : texte imprimé Auteurs : Adam J. Fischmann, Auteur ; David G. Dixon, Auteur Année de publication : 2011 Article en page(s) : pp. 746–751 Note générale : Génie Minier Langues : Anglais (eng) Mots-clés : Sulfide ores Hydrometallurgy Non-ferrous metallic Reduction Résumé : Recovery of aqueous copper(II) onto a chalcopyrite concentrate was shown to be rapid at 60 °C in the presence of S(IV), in this case sulfite. Surprisingly, rather than partial conversion of chalcopyrite to a copper sulfide such as chalcocite or covellite, copper was removed from solution by precipitation of a mixed-valence copper sulfite, Chevreul’s salt (Cu2SO3·CuSO3·2H2O). This has application as a way to increase the copper grade of chalcopyrite concentrates using the leachate from a Galvanox™ leach of flotation tailings, offering several advantages over similar processes employing an autoclave to effect copper precipitation. DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science/article/pii/S0892687510001408 [article] Upgrading of a chalcopyrite concentrate by reaction with copper(II) and sulfite : Unexpected formation of Chevreul’s salt, Cu2SO3·CuSO3·2H2O [texte imprimé] / Adam J. Fischmann, Auteur ; David G. Dixon, Auteur . - 2011 . - pp. 746–751. Génie Minier Langues : Anglais (eng) in Minerals engineering > Vol. 23 N° 9 (Août 2010) . - pp. 746–751 Mots-clés : Sulfide ores Hydrometallurgy Non-ferrous metallic Reduction Résumé : Recovery of aqueous copper(II) onto a chalcopyrite concentrate was shown to be rapid at 60 °C in the presence of S(IV), in this case sulfite. Surprisingly, rather than partial conversion of chalcopyrite to a copper sulfide such as chalcocite or covellite, copper was removed from solution by precipitation of a mixed-valence copper sulfite, Chevreul’s salt (Cu2SO3·CuSO3·2H2O). This has application as a way to increase the copper grade of chalcopyrite concentrates using the leachate from a Galvanox™ leach of flotation tailings, offering several advantages over similar processes employing an autoclave to effect copper precipitation. DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science/article/pii/S0892687510001408

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