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Recovery of copper cyanide from waste cyanide solution by LIX 7950 / Feng Xie in Minerals engineering, Vol. 22 N° 2 (Janvier 2009) 

Public ISBD [article]  in Minerals engineering > Vol. 22 N° 2 (Janvier 2009) . - pp. 190–195 Titre : Recovery of copper cyanide from waste cyanide solution by LIX 7950 Type de document : texte imprimé Auteurs : Feng Xie, Auteur ; David Dreisinger, Auteur Année de publication : 2009 Article en page(s) : pp. 190–195 Note générale : Génie Minier Langues : Anglais (eng) Mots-clés : Copper  Cyanide  effluent  Solvent  extraction  Guanidine Index. décimale : 622 Industrie minière Résumé : The use of the guanidine extractant, LIX 7950, to extract copper cyanide from waste cyanide solution has been investigated. Copper extraction is favorable at low pH while a high cyanide to copper molar ratio tends to suppress copper loading. The extractant also strongly extracted zinc and nickel from cyanide solution, but the extraction of iron was poor. The presence of thiocyanate ion significantly depressed copper extraction, but thiosulfate ion produced negligible impact on copper extraction. The preferential extraction of metal cyanide species to free cyanide has been noticed. The potential application of the recovery technique as a pre-concentration step for the treatment of cyanide effluent has been suggested, by which copper can be extracted and concentrated into a small volume of solution and the barren cyanide solution recycled to the cyanidation process. DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science/article/pii/S0892687508001799 [article] Recovery of copper cyanide from waste cyanide solution by LIX 7950 [texte imprimé] / Feng Xie, Auteur ; David Dreisinger, Auteur . - 2009 . - pp. 190–195. Génie Minier Langues : Anglais (eng) in Minerals engineering > Vol. 22 N° 2 (Janvier 2009) . - pp. 190–195 Mots-clés : Copper  Cyanide  effluent  Solvent  extraction  Guanidine Index. décimale : 622 Industrie minière Résumé : The use of the guanidine extractant, LIX 7950, to extract copper cyanide from waste cyanide solution has been investigated. Copper extraction is favorable at low pH while a high cyanide to copper molar ratio tends to suppress copper loading. The extractant also strongly extracted zinc and nickel from cyanide solution, but the extraction of iron was poor. The presence of thiocyanate ion significantly depressed copper extraction, but thiosulfate ion produced negligible impact on copper extraction. The preferential extraction of metal cyanide species to free cyanide has been noticed. The potential application of the recovery technique as a pre-concentration step for the treatment of cyanide effluent has been suggested, by which copper can be extracted and concentrated into a small volume of solution and the barren cyanide solution recycled to the cyanidation process. DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science/article/pii/S0892687508001799