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Investigation on alternative depressants for iron ore flotation / H.D.G. Turrer in Minerals engineering, Vol. 23 N° 11-13 (Octobre 2010) 

Public ISBD [article]  in Minerals engineering > Vol. 23 N° 11-13 (Octobre 2010) . - pp. 1066–1069 Titre : Investigation on alternative depressants for iron ore flotation Type de document : texte imprimé Auteurs : H.D.G. Turrer, Auteur ; A.E.C. Peres, Auteur Année de publication : 2011 Article en page(s) : pp. 1066–1069 Note générale : Génie Minier Langues : Anglais (eng) Mots-clés : Iron  ores  Flotation  depressants  Flotation  reagents Résumé : Iron ore concentration through flotation represents an important application of reagents in mineral processing. Nowadays all Brazilian iron ore concentrators use starch as iron oxides depressant. This study evaluated the application of other depressants, which are commonly used in other flotation systems. Six carboxymethylcelluloses, three lignosulphonates, one guar gum, and four humic acids samples were investigated in the reverse cationic flotation. Laboratory flotation tests showed that only two polymers (one carboxymethylcellulose and guar gum) reached the same performance as starch. The superior performance of these reagents was due to the presence of the glucopyranose ring. The use of polymers blends led to promising results. DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science/article/pii/S0892687510001421 [article] Investigation on alternative depressants for iron ore flotation [texte imprimé] / H.D.G. Turrer, Auteur ; A.E.C. Peres, Auteur . - 2011 . - pp. 1066–1069. Génie Minier Langues : Anglais (eng) in Minerals engineering > Vol. 23 N° 11-13 (Octobre 2010) . - pp. 1066–1069 Mots-clés : Iron  ores  Flotation  depressants  Flotation  reagents Résumé : Iron ore concentration through flotation represents an important application of reagents in mineral processing. Nowadays all Brazilian iron ore concentrators use starch as iron oxides depressant. This study evaluated the application of other depressants, which are commonly used in other flotation systems. Six carboxymethylcelluloses, three lignosulphonates, one guar gum, and four humic acids samples were investigated in the reverse cationic flotation. Laboratory flotation tests showed that only two polymers (one carboxymethylcellulose and guar gum) reached the same performance as starch. The superior performance of these reagents was due to the presence of the glucopyranose ring. The use of polymers blends led to promising results. DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science/article/pii/S0892687510001421