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Extracting Uranium from Low-grade Ore from the Coso Mountains, CA.

Authors
Maysilles-JH; Nichols-IL; Seidel-DC
Source
NTIS: PB 288 233 :14 pages
Link
NIOSHTIC No.
10007866
Abstract
The Bureau of Mines, U.S. Department of the Interior, is investigating several types of low-grade uranium deposits. Projections indicate that an increased percentage of future production will be derived from such sources. One material studied was from the Coso Mountains of California; this material contained 0.04 to 0.12 percent u3o8. The deposit contains at least two distinct types of mineralization. The material representing the bulk of this deposit was amenable to acid leaching; 80 to 85 percent u3o8 extraction resulted from leaching with 20 to 40 pounds per ton of sulfuric acid. No oxidizing agent was required. This ore fraction could be treated by either agitation or percolation leaching. Uranium recovery and purification from the acid leach solution was accomplished using anion exchange followed by precipitation with hydrogen peroxide and ammonia. The second type of mineral was very refractory to acid leaching; a maximum extraction of only 44 percent was obtained with sulfuric acid. Nitric and hydrochloric acids were ineffective also.
Publication Date
19780101
Document Type
IH; Report of Investigation;
Fiscal Year
1978
NTIS Accession No.
PB-288233
NTIS Price
A03
Identifying No.
RI 8306
NIOSH Division
SLRC;
Source Name
NTIS: PB 288 233
State
CA;
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