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Column Leaching of Low-grade Chalcopyrite Ores Using Thermophilic Bacteria.

Authors
Brierley-CL
Source
NTIS: PB/81-128498 :96 pages
Link
NIOSHTIC No.
10007147
Abstract
Low-grade porphyry copper ores containing chalcopyrite as the primary mineral was leached by two strains of acidophilic, thermophilic microbes belonging to the genus sulfobus. Leach tests were conducted in glass columns heated to 60 deg. to 70 deg. C. Ores sized to minus 1/2 inch plus 50 mesh were effectively leached by the thermophilic organisms, but ores sized to minus 2 inch plus 1/2 inch resisted leaching. Decreasing the ph of the leachate to about 1.8 Enhanced the copper extraction from ore with the thermophilic microbes. The bacterium thiobacillus ferrooxidans was relatively ineffective for extracting copper from the ore.
Publication Date
19790101
Document Type
CP; Final Contract Report;
Fiscal Year
1979
NTIS Accession No.
PB81-128498
NTIS Price
A06
Identifying No.
OFR 113-80
NIOSH Division
SLRC;
Source Name
NTIS: PB/81-128498
State
NM;
Performing Organization
New Mexico BoM & Min. Res. & Inst.
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