Extraction of uranium low-grade ores from Great Divide Basin, Wyoming. National Uranium Resource Evaluation. [Acid, roast-acid, and pressure leaching techniques]
Technical Report
·
OSTI ID:6287573
The US Bureau of Mines is investigating the leachability of carbonaceous uranium ore samples submitted by the DOE under an Interagency Agreement. Studies on eight samples from the Great Divide Basin, Wyoming, are the basis of this report. The uranium content of the eight ore samples ranged from 0.003 to 0.03% U/sub 3/O/sub 8/ and contained 0.7 to 45% organic carbon. Experiments were performed to determine the feasibility of extracting uranium using acid leaching, roast-acid leaching and pressure leaching techniques. Acid leaching with 600 lb/ton H/sub 2/SO/sub 4/ plus 10 lb/ton NaClO/sub 3/ for 18 h at 70/sup 0/C extracted 65 to 83% of the uranium. One sample responded best to a roast-leach treatment. When roasting for 4 h at 500/sup 0/C followed by acid leaching of the calcine using 600 lb/ton H/sub 2/SO/sub 4/, the uranium extraction was 82%. Two of the samples responded best to an oxidative pressure leach for 3 h at 200/sup 0/C under a total pressure of 260 psig; uranium extractions were 78 and 82%.
- Research Organization:
- Bureau of Mines, Salt Lake City, UT (USA). Salt Lake City Research Center
- DOE Contract Number:
- AC13-76GJ01664; AI13-81GJ01699
- OSTI ID:
- 6287573
- Report Number(s):
- GJBX-21(83); ON: DE83011313
- Country of Publication:
- United States
- Language:
- English
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