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Summary of a Technique for Heap Leach Simulation on Uranium Ores.
Peterson-HD; Seidel-DC; Nichols-IL
Available for Reference Only At Bureau Libraries :40 pages
A technique was developed for simulation of heap leaching uranium ores in 2-ft-diam columns constructed such that ores as coarse as minus 4-in could be treated in bed depths from 8 to 18 ft with test condition variations. The technique consisted of the separate steps of ore preparation, column loading, charge wetting, leaching, washing, and residue recovery. For the ores studied, sulfuric acid was found to be generally superior to alkaline lixiviants. The rate of uranium extraction by acid leaching proved to be primarily a function of percolation rate, alkalinity of the ores, and oxidant requirements of the ores. Column leaching was closely comparable to field-scale heap leaching terms of uranium extraction rate and recovery results. Acid and oxidant requirements were lower for the field-scale operation. All column tests, as well as the field-scale heap, achieved in excess of 96-pct uranium extraction on a Bear Creek, Wyoming, ore.
CP; Final Contract Report;
Available for Reference Only At Bureau Libraries.
Colorado School of Mines Res Ins
Page last reviewed: March 11, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division