Improved flotation of sulphide minerals

B - Operations – Transporting – 03 – B

Patent

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Details

B03B 1/04 (2006.01) B03D 1/00 (2006.01) B03D 1/002 (2006.01) B03D 1/02 (2006.01)

Patent

CA 2392752

The present invention relates generally to a process and an apparatus for flotation of sulphide minerals, such as sulphide minerals hosted in ores rich in magnesium minerals. The process involves grinding of the nickel ore rich in magnesium minerals and thereafter separation of the ground material into a coarse and fine stream of particles coarser than about 30 microns and finer than about 30 microns, respectively. Optionally, the fines stream may be further separated into a slimes fraction. The coarse and fine flotation streams are then fit to separate parallel flotation circuits. Acid and/or activator is added during flotation of the coarse stream only. Significantly improved recoveries and grades were obtained with reduced acid consumption.

La présente invention concerne d'une façon générale un processus et un appareil destiné à la flottation de minéraux sulfurés, tels que les minéraux sulfurés contenus dans des minerais riches en minéraux de magnésium. Ce processus comprend le broyage de minerai de nickel riche en minéraux de magnésium, puis la séparation du matériau broyé en un flux de particules grossières et fines, respectivement plus grossières que 30 microns et plus fines que 30 microns. On peut éventuellement séparer à nouveau le flux de particules fines en une fraction de dépôts. Les flux de flottation des particules grossières et fines sont ensuite agencés dans des circuits de flottation parallèles séparés. On ajoute de l'acide et/ou un activateur uniquement pendant la flottation du flux de particules grossières. Les récupérations et les degrés obtenus ont été considérablement améliorés avec une consommation d'acide réduite.

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