Pilot Mill Flotation of Anorthositic Platinum-palladium Ore from the Stillwater Complex PDF Download
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Author: Edward Morrice
Publisher:
ISBN:
Category : Flotation
Languages : en
Pages : 16
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Book Description
Author: Edward Morrice
Publisher:
ISBN:
Category : Flotation
Languages : en
Pages : 16
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Book Description
Author: Edward Morrice
Publisher:
ISBN:
Category : Flotation
Languages : en
Pages : 20
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Book Description
Author:
Publisher:
ISBN:
Category : Flotation
Languages : en
Pages : 20
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Book Description
The 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:
ISBN:
Category : Government publications
Languages : en
Pages : 1092
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Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages :
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Author:
Publisher:
ISBN:
Category : Mineral industries
Languages : en
Pages : 962
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Author: United States. Bureau of Mines
Publisher:
ISBN:
Category : Mineral industries
Languages : en
Pages : 646
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Author: P.M.J Gray
Publisher: Springer Science & Business Media
ISBN: 9400908091
Category : Science
Languages : en
Pages : 303
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Author: United States. Bureau of Mines
Publisher:
ISBN:
Category : Fuel
Languages : en
Pages : 136
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Author:
Publisher:
ISBN:
Category : Government Publications
Languages : en
Pages : 1002
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