B - Operations – Transporting – 03 – D
Patent
B - Operations, Transporting
03
D
B03D 1/02 (2006.01) B03B 1/00 (2006.01) C22B 1/00 (2006.01)
Patent
CA 2299904
A process for floating fine particles containing metal values of an iron- bearing sulphide mineral ore including the steps of conditioning the aqueous pulp of one at a pH of between about 7 and about 10 with a reducing agent which is preferably oxy- sulphur compound which dissociates to form oxy sulphur ions having the general formula:- S n O y z- where n is greater than 1; y is greater than 2; and z is the valance of the ion. A suitable collector is then added to the conditioned aqueous pulp to further condition the pulp and the pulp potential of the pulp raised to a sufficient level for the collector to adsorb onto the sulphide mineral ore. Gas is then bubbled through the aqueous pulp to subject the pulp to froth flotation. The froth from the flotation process is recovered to produce a concentrate of fine sulphide mineral and other metal values. By conditioning the aqueous pulp at a pulp potential which dissolves the iron hydroxide film from the surface of the metal sulphide inclusions in the ore and subjecting the ore to froth flotation at a suitable pulp potential before the iron hydroxide can reform, the recovery of metal values in the fine ores can be greatly enhanced.
Ahveninen Raimo Ilmari
Senior Geoffrey David
Commonwealth Scientific And Industrial Research Organisation
Kirby Eades Gale Baker
LandOfFree
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