Extraction of uranium from low-grade ore from McDermitt, Nevada
The US Bureau of Mines is investigating uranium ore samples submitted by the Department of Energy under an Interagency Agreement. One sample from McDermitt, Nevada, containing 0.0875 pct U/sub 3/O/sub 8/, is the basis of this report. Leaching studies were performed to determine the feasibility of extracting uranium from this ore body. Acid leaching with 400-lb H/sub 2/SO/sub 4//ton of ore and 10-lb NaClO/sub 3//ton of ore extracted 84 pct of the U/sub 3/O/sub 8/ from the ore. When the ore sample was roasted for 4 hr at 500/sup 0/C followed by an acid leach, extraction of U/sub 3/O/sub 8/ was 90 pct; the required acid addition was 400-lb H/sub 2/SO/sub 4//ton of ore. Extraction of U/sub 3/O/sub 8/ was 93 pct when pressure leached under oxygen in an autoclave at 260 psig, 200/sup 0/C for 3 hrs using 400-lb H/sub 2/SO/sub 4//ton of ore. Carbonate leaching at 85/sup 0/C extracted 50 pct of the U/sub 3/O/sub 8/, but the oxidant requirement was 20-lb KMnO/sub 4//ton of ore. Roasting of the ore followed by a carbonate leach of the calcine increased the extraction of U/sub 3/O/sub 8/ to 70 pct. 7 tables.
- Research Organization:
- Bureau of Mines, Salt Lake City, UT (USA). Salt Lake City Research Center
- DOE Contract Number:
- AC13-76GJ01664; AI13-81GJ01699
- OSTI ID:
- 6146457
- Report Number(s):
- GJBX-23(83); ON: DE83011314
- Country of Publication:
- United States
- Language:
- English
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URANIUM ORES
LEACHING
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PRODUCTION
CHLORATES
EXPERIMENTAL DATA
FEASIBILITY STUDIES
HIGH TEMPERATURE
MEDIUM PRESSURE
NEVADA
POTASSIUM PERMANGANATES
ROASTING
SODIUM COMPOUNDS
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ACTINIDE COMPOUNDS
ALKALI METAL COMPOUNDS
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FEDERAL REGION IX
HALOGEN COMPOUNDS
HYDROGEN COMPOUNDS
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INORGANIC ACIDS
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NORTH AMERICA
NUMERICAL DATA
ORES
OXIDATION
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OXYGEN COMPOUNDS
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POTASSIUM COMPOUNDS
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URANIUM COMPOUNDS
URANIUM OXIDES
USA
050400* - Nuclear Fuels- Feed Processing