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Pilot Mill Flotation of Serpentinized Platinum-Palladium Ore From the Stillwater Complex

Personal Authors: Morrice, E. ; Walkiewicz, J. W. ; Casale, G.
Published Date: 1/1/1984
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The Bureau of Mines investigated methods for beneficiating platinum-palladium ores from the Stillwater Complex, Montana. Results of bench-scale and pilot-scale studies employing froth flotation to recover sulfide concentrates containing platinum-palladium values from a serpentinized ore are presented. Best results in the pilot mill were obtained with a sodium isobutyl xanthate-normal dodecyl mercaptan col-lector combination at a natural pH of 8.2. A rougher concentrate con-taining 1.7 oz/ton Pt and 4.7 oz/ton Pd was prepared. Recoveries of platinum and palladium were 96 pet and 86 pet, respectively. Batch cleaner flotation of rougher concentrates yielded concentrates contain-ing 3.7 oz/ton Pt and 9.8 oz/ton Pd.

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