Ph adjustment in the flotation of sulphide minerals

Details Ph adjustment in the flotation of sulphide minerals Ph adjustment in the flotation of sulphide minerals

B - Operations, Transporting

03

D

B03D 1/02 (2006.01) B03B 1/04 (2006.01)

Patent

CA 2439499

The present invention relates generally to a process for flotation of sulphide minerals where a flotation pulp is separated into a coarse stream and a fine stream, preferably containing particles coarser than about 30 micron and particles finer than about 30 micron, respectively. Typically, alkali and depressant are added to the coarse flotation stream only and acid and activator are added to the fine flotation stream only. During flotation of the fine stream, acid and/or activator may be added at the conditioning, cleaning, re-cleaning, cleaner-scavenging or third cleaning stage. During flotation of the coarse stream, alkali and/or depressant may be added at the conditioning or cleaning stage.

L'invention concerne, d'une manière générale, un procédé destiné à la flottation de minéraux de sulfure, une pulpe de flottation étant séparée en un flux grossier et en un flux fin, renfermant, de préférence, des particules de granulométrie supérieure à environ 30 microns et des particules de granulométrie inférieure à environ 30 microns, respectivement. Généralement, un alcali et un dépresseur sont ajoutés uniquement au flux grossier de flottation et un acide et un activateur sont ajoutés uniquement au flux fin de flottation. Au cours de la flottation du flux fin, un acide et/ou un activateur peuvent être ajoutés au cours de l'étape de conditionnement, de nettoyage, de re-nettoyage, de nettoyage-épuissement ou de la troisième étape de nettoyage. Au cours de la flottation du flux grossier, un alcali et/ou un dépresseur peuvent être ajoutés au cours de l'étape de conditionnement ou de nettoyage.

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