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Depression of pyrite in the flotation of high pyrite low-grade lead–zinc ore using acidithiobacillus ferrooxidans / J. V. Mehrabani in Minerals engineering, Vol. 23 N° 1 (Janvier 2010) 

Public ISBD [article]  in Minerals engineering > Vol. 23 N° 1 (Janvier 2010) . - pp. 10-16 Titre : Depression of pyrite in the flotation of high pyrite low-grade lead–zinc ore using acidithiobacillus ferrooxidans Type de document : texte imprimé Auteurs : J. V. Mehrabani, Auteur ; M. Noaparast, Auteur ; S. M. Mousavi, Auteur Article en page(s) : pp. 10-16 Note générale : Génie Minier Métallurgie Langues : Anglais (eng) Mots-clés : Bacteria  Froth  flotation  Sulfide  ores  Sodium  cyanide  Process  optimization Index. décimale : 622 Industrie minière Résumé : In this research work, selective depression of pyrite in the flotation of a low-grade lead–zinc ore containing 31% pyrite was investigated in the absence and presence of Acidithiobacillus ferrooxidans. Pyrite was significantly depressed with these bacteria using the optimum dosage of reagents. Sphalerite recovery and Zn grade in the obtained sphalerite concentrate were both enhanced by bacteria. The results of bioflotation experiments showed that bacterial depression of pyrite is very sensitive to the concentration of other flotation reagents. Least significance difference (LSD) bars were used to study the significance of the factors under study with a confidence interval of 90%. Under similar conditions, A. ferrooxidans was seen to increase the Zn grade and separation efficiency more effectively than sodium cyanide. Flotation kinetic studies confirmed a considerable decrease in the pyrite kinetic rate constant in the presence of A. ferrooxidans. DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6VDR-4XDKC9K-1&_user=6 [...] [article] Depression of pyrite in the flotation of high pyrite low-grade lead–zinc ore using acidithiobacillus ferrooxidans [texte imprimé] / J. V. Mehrabani, Auteur ; M. Noaparast, Auteur ; S. M. Mousavi, Auteur . - pp. 10-16. Génie Minier Métallurgie Langues : Anglais (eng) in Minerals engineering > Vol. 23 N° 1 (Janvier 2010) . - pp. 10-16 Mots-clés : Bacteria  Froth  flotation  Sulfide  ores  Sodium  cyanide  Process  optimization Index. décimale : 622 Industrie minière Résumé : In this research work, selective depression of pyrite in the flotation of a low-grade lead–zinc ore containing 31% pyrite was investigated in the absence and presence of Acidithiobacillus ferrooxidans. Pyrite was significantly depressed with these bacteria using the optimum dosage of reagents. Sphalerite recovery and Zn grade in the obtained sphalerite concentrate were both enhanced by bacteria. The results of bioflotation experiments showed that bacterial depression of pyrite is very sensitive to the concentration of other flotation reagents. Least significance difference (LSD) bars were used to study the significance of the factors under study with a confidence interval of 90%. Under similar conditions, A. ferrooxidans was seen to increase the Zn grade and separation efficiency more effectively than sodium cyanide. Flotation kinetic studies confirmed a considerable decrease in the pyrite kinetic rate constant in the presence of A. ferrooxidans. DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6VDR-4XDKC9K-1&_user=6 [...]