The effect of increased frother dosage on froth stability at high depressant dosages / J.G. Wiese in Minerals engineering, Vol. 23 N° 11-13 (Octobre 2010)  

Public ISBD [article]  inMinerals engineering > Vol. 23 N° 11-13 (Octobre 2010) . - pp. 1010–1017 Titre : The effect of increased frother dosage on froth stability at high depressant dosages Type de document : texte imprimé Auteurs : J.G. Wiese, Auteur ; P.J. Harris, Auteur ; D. J. Bradshaw, Auteur Année de publication : 2011 Article en page(s) : pp. 1010–1017 Note générale : Génie Minier Langues : Anglais (eng) Mots-clés : Precious metal ores Froth flotation Flotation depressants frothers Résumé : High energy costs required to smelt low grade concentrates could be alleviated by the production of high grade concentrates. Obtaining maximum PGM recovery by the use of high dosages of polysaccharide depressants may be problematic in that a significant decrease in the stability of the froth, particularly with CMC, results. These highly unstable froths may result in restricted mass pulls and decreased valuable mineral recovery. There are a number of ways of counteracting unstable froths, such as increasing airflow rate, reducing froth height or increasing frother dosage. Although necessary to maximise PGM recovery, all of these are likely to lead to increased water recovery and dilution of the concentrate by entrained material. This work examines the effect of increasing frother dosage on the recovery of sulphide minerals and floatable gangue from a Merensky ore at varying dosages of guar gum and CMC, as well as on the recovery of entrained gangue and its dependence on the physical nature of the flotation pulp. DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science/article/pii/S0892687510001196 [article] The effect of increased frother dosage on froth stability at high depressant dosages [texte imprimé] / J.G. Wiese, Auteur ; P.J. Harris, Auteur ; D. J. Bradshaw, Auteur . - 2011 . - pp. 1010–1017. Génie Minier Langues : Anglais (eng) in Minerals engineering > Vol. 23 N° 11-13 (Octobre 2010) . - pp. 1010–1017 Mots-clés : Precious metal ores Froth flotation Flotation depressants frothers Résumé : High energy costs required to smelt low grade concentrates could be alleviated by the production of high grade concentrates. Obtaining maximum PGM recovery by the use of high dosages of polysaccharide depressants may be problematic in that a significant decrease in the stability of the froth, particularly with CMC, results. These highly unstable froths may result in restricted mass pulls and decreased valuable mineral recovery. There are a number of ways of counteracting unstable froths, such as increasing airflow rate, reducing froth height or increasing frother dosage. Although necessary to maximise PGM recovery, all of these are likely to lead to increased water recovery and dilution of the concentrate by entrained material. This work examines the effect of increasing frother dosage on the recovery of sulphide minerals and floatable gangue from a Merensky ore at varying dosages of guar gum and CMC, as well as on the recovery of entrained gangue and its dependence on the physical nature of the flotation pulp. DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science/article/pii/S0892687510001196

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