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Operating strategies to maximise gold recovery at telfer / X. Zheng in Minerals engineering, Vol. 23 N° 15 (Décembre 2010) 

Public ISBD [article]  in Minerals engineering > Vol. 23 N° 15 (Décembre 2010) . - pp. 1159–1166 Titre : Operating strategies to maximise gold recovery at telfer Type de document : texte imprimé Auteurs : X. Zheng, Auteur ; P. Manton, Auteur ; F. Burns, Auteur Année de publication : 2011 Article en page(s) : pp. 1159–1166 Note générale : Génie Minier Langues : Anglais (eng) Mots-clés : Froth  flotation  Liberation  Gold Résumé : On average, the difference in recovery between copper and gold is 15% among the large scale copper/gold operations. At Telfer, a number of operating strategies have been implemented together with a sequential flotation circuit design to maximise gold recovery. The main operating strategies include targeting a primary grind size optimum for copper recovery, designing and operating the main flotation circuit as copper and pyrite sequential flotation, targeting a minimum saleable concentrate copper grade, allowing a portion of pyrite/gold recovered into the copper concentrate and leaching the pyrite concentrate to extract the gold. These operating strategies have lifted the recovery of both copper and gold above 90%. There are opportunities to further improve the metallurgical performance at Telfer, including a single stage of cleaning of the copper rougher concentrate, regrinding of the copper scavenger concentrate prior to cleaning and regrinding of the pyrite rougher concentrate followed by additional copper/gold flotation prior to pyrite leaching. DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science/article/pii/S0892687510000701 [article] Operating strategies to maximise gold recovery at telfer [texte imprimé] / X. Zheng, Auteur ; P. Manton, Auteur ; F. Burns, Auteur . - 2011 . - pp. 1159–1166. Génie Minier Langues : Anglais (eng) in Minerals engineering > Vol. 23 N° 15 (Décembre 2010) . - pp. 1159–1166 Mots-clés : Froth  flotation  Liberation  Gold Résumé : On average, the difference in recovery between copper and gold is 15% among the large scale copper/gold operations. At Telfer, a number of operating strategies have been implemented together with a sequential flotation circuit design to maximise gold recovery. The main operating strategies include targeting a primary grind size optimum for copper recovery, designing and operating the main flotation circuit as copper and pyrite sequential flotation, targeting a minimum saleable concentrate copper grade, allowing a portion of pyrite/gold recovered into the copper concentrate and leaching the pyrite concentrate to extract the gold. These operating strategies have lifted the recovery of both copper and gold above 90%. There are opportunities to further improve the metallurgical performance at Telfer, including a single stage of cleaning of the copper rougher concentrate, regrinding of the copper scavenger concentrate prior to cleaning and regrinding of the pyrite rougher concentrate followed by additional copper/gold flotation prior to pyrite leaching. DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science/article/pii/S0892687510000701

A potential application of collectorless flotation in a copper/gold operation / X. Zheng in Minerals engineering, Vol. 23 N° 11-13 (Octobre 2010) 

Public ISBD [article]  in Minerals engineering > Vol. 23 N° 11-13 (Octobre 2010) . - pp. 895–902 Titre : A potential application of collectorless flotation in a copper/gold operation Type de document : texte imprimé Auteurs : X. Zheng, Auteur ; P. Manton, Auteur Année de publication : 2011 Article en page(s) : pp. 895–902 Note générale : Génie Minier Langues : Anglais (eng) Mots-clés : Froth  flotation  Flotation  collectors Résumé : A recent study found that chalcopyrite in the Telfer ore could float without a collector whilst pyrite did not float without a collector in the laboratory. In comparison of the flotation result with and without a collector, the two grade–recovery curves are clearly separated due mainly to less pyrite recovery and higher concentrate grades produced by collectorless flotation. Pre-aeration tended to promote collectorless flotation of chalcopyrite while it had a negligible effect on pyrite flotation. In addition to the laboratory study, pulp potential measurements were conducted in the plant. The results indicate that chalcopyrite is likely to retain its collectorless floatability after SAG milling. This may provide an opportunity of using a flash unit for collectorless flotation on the SAG mill discharge stream. DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science/article/pii/S0892687510000403 [article] A potential application of collectorless flotation in a copper/gold operation [texte imprimé] / X. Zheng, Auteur ; P. Manton, Auteur . - 2011 . - pp. 895–902. Génie Minier Langues : Anglais (eng) in Minerals engineering > Vol. 23 N° 11-13 (Octobre 2010) . - pp. 895–902 Mots-clés : Froth  flotation  Flotation  collectors Résumé : A recent study found that chalcopyrite in the Telfer ore could float without a collector whilst pyrite did not float without a collector in the laboratory. In comparison of the flotation result with and without a collector, the two grade–recovery curves are clearly separated due mainly to less pyrite recovery and higher concentrate grades produced by collectorless flotation. Pre-aeration tended to promote collectorless flotation of chalcopyrite while it had a negligible effect on pyrite flotation. In addition to the laboratory study, pulp potential measurements were conducted in the plant. The results indicate that chalcopyrite is likely to retain its collectorless floatability after SAG milling. This may provide an opportunity of using a flash unit for collectorless flotation on the SAG mill discharge stream. DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science/article/pii/S0892687510000403