Pilot Mill Flotation of Serpentinized Platinum-palladium Ore from the Stillwater Complex
Author: Edward Morrice
Publisher:
Published: 1984
Total Pages: 20
ISBN-13:
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Author: Edward Morrice
Publisher:
Published: 1984
Total Pages: 20
ISBN-13:
DOWNLOAD EBOOKAuthor: Edward Morrice
Publisher:
Published: 1984
Total Pages: 11
ISBN-13:
DOWNLOAD EBOOKAuthor: Edward Morrice
Publisher:
Published: 1983
Total Pages: 16
ISBN-13:
DOWNLOAD EBOOKAuthor:
Publisher:
Published: 1982
Total Pages: 734
ISBN-13:
DOWNLOAD EBOOKAuthor:
Publisher:
Published: 1985
Total Pages: 20
ISBN-13:
DOWNLOAD EBOOKThe Bureau of Mines devised a procedure for selectively extracting platinum-group metals (PGM) and gold from Stillwater Complex flotation concentrate. The Stillwater Complex is the only major U.S. PGM resource. Development of a suitable extraction technique will contribute to its exploitation. The concentrate was roasted at 1,050° C to convert host base-metal sulfides to oxides and the PGM from sulfide minerals to their elemental states. The roasted concentrate was preleached with dilute sulfuric acid to remove easily soluble gangue minerals. After pre-leaching, the concentrate was slurried with 6M HCI and leached at ambient temperature and pressure with a strong-oxidizing agent. Hydrogen peroxide, chlorine, sodium hypochlorite, nitric acid, and a persulfate salt were the oxidants investigated. The two-stage leaching scheme ex-tracted up to 97 pct of the platinum, 92 pct of the palladium, and 99 pct of the gold from the roasted concentrate. The base metals were not solubilized and reported to the residue. No attempt was made to devise a procedure to recover the copper and nickel because they comprise less than 5 pct of the value of the concentrate. Viable techniques for recovering the precious metals from the pregnant solution were sulfide precipitation, cementation with nickel, or adsorption on activated carbon.
Author:
Publisher:
Published: 1984
Total Pages: 1252
ISBN-13:
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Published:
Total Pages: 956
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DOWNLOAD EBOOKAuthor: United States. Bureau of Mines
Publisher:
Published: 1987
Total Pages: 646
ISBN-13:
DOWNLOAD EBOOKAuthor: United States. Bureau of Mines. Branch of Editorial Services
Publisher:
Published: 1987
Total Pages: 658
ISBN-13:
DOWNLOAD EBOOKAuthor: P.M.J Gray
Publisher: Springer Science & Business Media
Published: 2012-12-06
Total Pages: 303
ISBN-13: 9400908091
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