Skip directly to search Skip directly to A to Z list Skip directly to page options Skip directly to site content

NIOSHTIC-2 Publications Search

Search Results

Extracting Platinum-group Metals from Stillwater Complex Flotation Concentrate by a Two-stage Bacterial Oxidation/chemical Treatment Process.

Authors
Yopps-DL; Baglin-EG
Source
Paper in Mineral Bioprocessing TMS PP 247-260 :247-260
Link
NIOSHTIC No.
10011585
Abstract
In this U.S. Bureau of Mines research, platinum-group metal (PGM) flotation concentrate from the Stillwater Complex, Montana, 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 treatment 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. Results showed that increased sulfide oxidation during the biological stage led to improved PGM recovery in the subsequent chemical leaching stage. Cyanidation at 80 deg c proved to be the best chemical leachant tested. It removed 76 pct of the palladium, 94 pct of the rhodium, and 97 pct of the gold, but only 34 pct of the platinum from the biooxidized concentrate.
Publication Date
19910101
Document Type
OP;
Fiscal Year
1991
NTIS Accession No.
NTIS Price
Identifying No.
OP 47-92
NIOSH Division
RERC;
Source Name
Paper in Mineral Bioprocessing. TMS, PP. 247-260
State
MT;
TOP