Author: Elizabeth G. BaglinPublisher:
ISBN:
Category : Leaching
Languages : en
Pages : 24
Book Description
Recovery of Platinum-group Metals from Stillwater Complex, Mont., Flotation Concentrates by Matte Smelting and Leaching
Author: Elizabeth G. BaglinPublisher:
ISBN:
Category : Leaching
Languages : en
Pages : 24
Book Description
Recovery of Platinum, Palladium, and Gold from Stillwater Complex Flotation Concentrate by a Roasting-leaching Procedure
Author: Publisher:
ISBN:
Category : Flotation
Languages : en
Pages : 20
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.
Bacterial Preoxidation of Stillwater Complex, MT, Platinum-group Metal Flotation Concentrate and Recovery of Plantinum-group Metals by Cyanidation and Other Leachants
Author: Deborah L. YoppsPublisher:
ISBN:
Category : Bacterial leaching
Languages : en
Pages : 20
Book Description
Recovery of Platinum-group Metals from Stillwater Complex, Mont., Flotation Concentrates by Matte Smelting and Leaching
Author: Elizabeth G. BaglinPublisher:
ISBN:
Category : Leaching
Languages : en
Pages : 15
Book Description
Report of Investigations
Author: Performance Evaluation of Electromagnetic Techniques for the Location of Trapped Miners
Author: John DurkinPublisher:
ISBN:
Category : Electromagnetic fields
Languages : en
Pages : 426
Book Description
A Case History of a Major Rock Burst
Author: Fred LeightonPublisher:
ISBN:
Category : Mineral industries
Languages : en
Pages : 484
Book Description
Monthly Catalog of United States Government Publications
Author: Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 912
Book Description
Monthly Catalogue, United States Public Documents
Author: Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1064
Book Description
Bureau of Mines Research
Author: United States. Bureau of MinesPublisher:
ISBN:
Category : Fuel
Languages : en
Pages : 148
Book Description