Collectorless flotation

Classifying – separating – and assorting solids – Fluid suspension – Liquid

Reexamination Certificate

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Details

C209S166000

Reexamination Certificate

active

06889844

ABSTRACT:
The present invention relates to a process for improving the recovery of valuable sulphide minerals. The process involves determining an Eh range within which the valuable sulphide mineral may be recovered by flotation without the need of a collector. The slurry is then subjected to flotation in a pneumatic cell (50) at such a speed that the slurry remains within the Eh range during flotation. The process substantially reduces or totally eliminates the need for collector. For mixed ores such as chalcopyrite/chalcocite chalcopyrite is recovered without collector, while some non xanthate collector may be required to recover chalcocite.

REFERENCES:
patent: 4561970 (1985-12-01), Heimala et al.
patent: 3819985 (1985-08-01), None
patent: WO 9304783 (1993-03-01), None
patent: WO 9521698 (1995-08-01), None
patent: WO 9703754 (1997-02-01), None
Ahn et al, “Effect of grinding media-chalcopyrite interaction on the self-induced flotation of chalcopyrite”, International Journal of Mineral Processing, 33 (1991) pp. 243-262. Elsevier Science Publishers, Amersterdam.*
Kennedy, “The Jameson Flotation Cell”, Mining Magazine, Oct. 1990 pp. 281+.*
Trahar, “Pulp potential in sulfide flotation” in Principles of Mineral Flotation-The Work Symposium, (editors M. H. Jones and J. T. Woodcock), pp 117-135 (The Australasian Institute of Mining and Metallurgy: Melbourne).*
International Search Report for PCT/AU99/00772.

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