Documents disponibles écrits par cet auteur

Hydrometallurgical recovery of copper and cobalt from reduction-roasted copper converter slag / Ewa Rudnik in Minerals engineering, Vol. 22 N° 1 (Janvier 2009) 

Public ISBD [article]  in Minerals engineering > Vol. 22 N° 1 (Janvier 2009) . - pp. 88–95 Titre : Hydrometallurgical recovery of copper and cobalt from reduction-roasted copper converter slag Type de document : texte imprimé Auteurs : Ewa Rudnik, Auteur ; Lidia Burzyńska, Auteur ; Wanda Gumowska, Auteur Année de publication : 2009 Article en page(s) : pp. 88–95 Note générale : Génie Minier Langues : Anglais (eng) Mots-clés : Copper  converter  slag  Hydrometallurgy  Electrowinning  Waste  processing Index. décimale : 622 Industrie minière Résumé : The paper is concerned with a simple hydrometallurgical method for selective recovery of copper and cobalt from industrial copper converter slag. The following consecutive stages are proposed: roasting of the slag in reduction conditions to produce Cu–Co–Fe–Pb alloy, electrolytic dissolution of the alloy in an ammonia–ammonium chloride solution, ammoniacal leaching of the slime, selective copper and cobalt electrowinning. Cu27–Co6–Fe64–Pb1.5 alloy was a five-phase system and did not dissolve uniformly during electrolysis. This resulted in the separation of the metals, wherein iron remained in the slime, while copper and cobalt were components of slime, electrolyte and cathodic deposit. A mechanism of the alloy dissolution was developed. A series of secondary processes took place in the system: precipitation of iron compounds, copper cementation with cobalt and iron; adsorption of copper and cobalt ions on the iron precipitates. Final products were metals of high purity (99.9% Cu, 92% Co). DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science/article/pii/S0892687508001234 [article] Hydrometallurgical recovery of copper and cobalt from reduction-roasted copper converter slag [texte imprimé] / Ewa Rudnik, Auteur ; Lidia Burzyńska, Auteur ; Wanda Gumowska, Auteur . - 2009 . - pp. 88–95. Génie Minier Langues : Anglais (eng) in Minerals engineering > Vol. 22 N° 1 (Janvier 2009) . - pp. 88–95 Mots-clés : Copper  converter  slag  Hydrometallurgy  Electrowinning  Waste  processing Index. décimale : 622 Industrie minière Résumé : The paper is concerned with a simple hydrometallurgical method for selective recovery of copper and cobalt from industrial copper converter slag. The following consecutive stages are proposed: roasting of the slag in reduction conditions to produce Cu–Co–Fe–Pb alloy, electrolytic dissolution of the alloy in an ammonia–ammonium chloride solution, ammoniacal leaching of the slime, selective copper and cobalt electrowinning. Cu27–Co6–Fe64–Pb1.5 alloy was a five-phase system and did not dissolve uniformly during electrolysis. This resulted in the separation of the metals, wherein iron remained in the slime, while copper and cobalt were components of slime, electrolyte and cathodic deposit. A mechanism of the alloy dissolution was developed. A series of secondary processes took place in the system: precipitation of iron compounds, copper cementation with cobalt and iron; adsorption of copper and cobalt ions on the iron precipitates. Final products were metals of high purity (99.9% Cu, 92% Co). DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science/article/pii/S0892687508001234