Classifying – separating – and assorting solids – Fluid suspension – Liquid
Patent
1998-07-13
2000-04-04
Lithgow, Thomas M.
Classifying, separating, and assorting solids
Fluid suspension
Liquid
209166, 209167, 241 2413, 241 2425, B03D 102, B03B 104, B03B 100
Patent
active
060449780
ABSTRACT:
The present invention provides a process for the recovery of base metal sulfides including chalcocite, chalcopyrite, pentlandite and platinum group metal bearing mineral ores. The process involves passing a slurry of the ore through a reagent conditioning stage wherein suitable activators, collectors, frothers and/or depressants are added, further conditioning the slurry with a non-oxidizing gas in a quantity conducive to the separation of the sulfide minerals from the remainder of the ore and subsequently subjecting the slurry to a final flotation treatment with a flotation gas having a higher oxygen content than the non-oxidizing gas. The non-oxidizing gas conditioning can be carried out prior to or after the reagent conditioning stage.
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Xu, et al., "Sphalerite Reverse Flotation Using Nitrogen," Proc. Electrochem Soc., vol. 92-17, Proc. Int., Symp. Electrochem. Miner. Met. Process. III, 3rd, pp. 170-190 (1992).
Kongolo et al., "Improving the efficiency of sulphidization of oxidized copper ores by column and inert gas flotation," Proceedings of COPPER 95-COBRE 95 International Conference, vol. II, The Metallurgical Society of CIM, pp. 183-196, 1995.
J.H. Ahn and J.E. Gebhardt. "Effect of Grinding Media-Chalcopyrite Interaction on the Self-Induced Flotation of Chalcopyrite", International Journal of Mineral Processing, 1991, pp. 243-262, vol. 33. Elsevier Science Publishers B.V., Amsterdam.
Clark David William
Gumede Henry Nhlanhla
Newell Andrew James Haigh
BOC Gases Australia Limited
Lithgow Thomas M.
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