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Heap Leaching Studies on Uranium Ore. Phase V: Experimental Studies.

PB293578

Publication Date	1978
Personal Author	Merritt, R.; Peterson, H.; Wentz, C.; Harris, M.
Page Count	223
Abstract	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.
Keywords	Uranium ores Leaching Extraction Sandstones Sodium carbonates Ammonium compounds Sulfuric acid Sodium hypochlorite Hydrometallurgy Percolation Pilot plants Oxidation Pelleting Colorado Tables(Data)
Source Agency	Bureau of Mines
NTIS Subject Category	48A - Mineral Industries
Corporate Authors	Colorado School of Mines Research Inst., Golden.; Bureau of Mines, Washington, DC.
Supplemental Notes	See also Phase 4, PB-272 716.
Document Type	Technical Report
Title Note	Open file rept. 15 Aug 77-4 Dec 78.
NTIS Issue Number	197915
Contract Number	HO252022

Heap Leaching Studies on Uranium Ore. Phase V: Experimental Studies.

Heap Leaching Studies on Uranium Ore. Phase V: Experimental Studies.
PB293578

Publication Date	1978
Personal Author	Merritt, R.; Peterson, H.; Wentz, C.; Harris, M.
Page Count	223
Abstract	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.
Keywords	Uranium ores Leaching Extraction Sandstones Sodium carbonates Ammonium compounds Sulfuric acid Sodium hypochlorite Hydrometallurgy Percolation Pilot plants Oxidation Pelleting Colorado Tables(Data)
Source Agency	Bureau of Mines
NTIS Subject Category	48A - Mineral Industries
Corporate Authors	Colorado School of Mines Research Inst., Golden.; Bureau of Mines, Washington, DC.
Supplemental Notes	See also Phase 4, PB-272 716.
Document Type	Technical Report
Title Note	Open file rept. 15 Aug 77-4 Dec 78.
NTIS Issue Number	197915
Contract Number	HO252022