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首页> 美国政府科技报告 >Bacterial Preoxidation of Stillwater Complex, MT, Platinum-Group Metal FlotationConcentrate and Recovery of Platinum-Group Metals by Cyanidation and Other Leachants
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Bacterial Preoxidation of Stillwater Complex, MT, Platinum-Group Metal FlotationConcentrate and Recovery of Platinum-Group Metals by Cyanidation and Other Leachants

机译：静水配合物的细菌预氧化，mT，铂族金属浮选浓缩和氰化和其他二元化合物回收铂族金属

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In research conducted by the U.S. Bureau of Mines, platinum-group metal (PGM)flotation concentrate from the Stillwater Complex, MT, was subjected to biooxidation using Thiobacillus ferrooxidans in an effort to break down the sulfide minerals and liberate the associated PGM's for subsequent chemical leaching. Bacterial preleaching oxidized up to 94 pct of the sulfide present, destroyed the PGM-bearing pentlandite ((Ni,Fe)9S8) mineralization, and dissolved most of the nickel in the concentrate. Cyanidation at 80 C proved to be the most attractive chemical leachant, removing 34 pct of the platinum, 76 pct of the palladium, 94 pct of the rhodium, and 97 pct of the gold from the biooxidized concentrate. Research also indicated that increased sulfide oxidation during the preleach phase led to improved PGM recovery in the subsequent chemical leaching phase.

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