Collector compositions for concentrating minerals by froth...

B - Operations – Transporting – 03 – D

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B03D 1/012 (2006.01)

Patent

CA 2213264

A new collector for froth flotation of copper and copper-activated minerals comprises the combination of an alkyl xanthate and a dialkyl thionocarbamate. A preferred embodiment comprises the combination of sodium isopropyl xanthate and ethyl isopropyl thionocarbamate in the approximate proportions of 90% and 10% by weight respectively. In comparison with the prior art collector sodium isopropyl xanthate, the new collector produces higher metallurgical yields for copper and copper - activated minerals (zinc, arsenic and molybdenum) and associated precious metals (silver and gold), more rapid flotation kinetics, higher pyrite rejection and a lower reagent dose requirement.

Divulgation d'un nouveau collecteur pour flottation par mousse de minéraux cuprifères et de minéraux activés par du cuivre, comprenant la combinaison d'un alkylxanthate et d'un dialkylthionocarbamate. Dans une application préférée, on combine de l'isopropylxanthate de sodium avec de l'éthylisopropylthionocarbamate dans des proportions approximatives de 90 et de 10 %, en poids. En comparaison avec le collecteur à base d'isopropylxanthate de sodium précédemment utilisé, le nouveau collecteur permet d'obtenir de plus hauts rendements métallurgiques de minéraux cuprifères, de minéraux activés par du cuivre (zinc, arsenic, molybdène) et de métaux précieux associés (argent et or), une cinétique de flottation plus rapide, un plus important rejet de pyrite, et nécessite une dose plus faible de réactif.

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