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Heap leaching studies on uranium ore. phase V: experimental studies. Open file report 15 August 1977-4 December 1978

Technical Report ·
OSTI ID:5560477
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Experimental studies were conducted on a low-grade ore procured from Wyoming. The ore was characterized as primarily sandstone with a trace of clay mineralization and had a U3O8 content of 0.029%. Preliminary laboratory studies were conducted on the ore sample to determine the response of the ore to acid and carbonate lixiviants. The studies showed that acid leaching by agitation and by 2-in column percolation gave 97% and 99% U3O8 extraction. The studies also showed that the ore was less responsive to carbonate leaching than to acid leaching. Tests conducted using a sodium carbonate lixiviant gave 69% and 82% U3O8 extraction for the agitation and percolation studies. Tests conducted using an ammonium carbonate lixiviant gave 39% and 83% U3O8 extraction for the agitation and percolation studies. Subsequent pilot plant studies consisted of nine percolation leach tests conducted in 2-ft diam columns, and one small-scale heap leach. These studies showed that the percolation tests using an acid lixiviant resulted in greater than 96% U3O8 extraction, whereas the percolation tests using carbonate lixiviants resulted in approximately 87% U3O8 extraction. The pilot plant studies using acid solution showed that the rate of U3O8 extraction was directly proportional to the flow rate.
Research Organization:
Colorado School of Mines, Golden (USA). Research Inst.
OSTI ID:
5560477
Report Number(s):
PB-293578
Country of Publication:
United States
Language:
English

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Related Subjects

050400* -- Nuclear Fuels-- Feed Processing
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
ALKALI METAL COMPOUNDS
AMMONIUM COMPOUNDS
CARBON COMPOUNDS
CARBONATES
CHEMICAL REACTIONS
COLORADO
DATA
DISSOLUTION
EXTRACTION
EXTRACTIVE METALLURGY
FUNCTIONAL MODELS
HYDROGEN COMPOUNDS
HYDROMETALLURGY
INFORMATION
INORGANIC ACIDS
LEACHING
METALLURGY
NORTH AMERICA
ORES
OXIDATION
OXYGEN COMPOUNDS
PILOT PLANTS
ROCKS
ROCKY MOUNTAIN REGION
SANDSTONES
SEDIMENTARY ROCKS
SEPARATION PROCESSES
SODIUM CARBONATES
SODIUM COMPOUNDS
SULFURIC ACID
URANIUM ORES
USA
WYOMING