Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Radioactive metal
Patent
1984-11-30
1987-10-20
Miller, Edward A.
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Radioactive metal
423 68, C01G 4300, C01G 3100
Patent
active
047013095
ABSTRACT:
Method of operating a heap leach for leaching uranium and vanadium from a uranium-vanadium bearing ore formed into a relatively tall heap from a mixture of coarsely crushed ore and concentrated sulfuric acid which involves leaching the heap in sections with each section leached in multiple cycles following a predetermined procedure in which the heap is first leached with dilute acid followed by a strong acid application. The product effluent from the strong acid application is recycled a multiple number of times and advanced to the next section. Each section is then washed with fresh water.
REFERENCES:
patent: 3777004 (1973-12-01), Lankenau et al.
patent: 3808306 (1974-04-01), Smith et al.
patent: 4017309 (1977-04-01), Johnson
Merritt, "The Extractive Metallurgy of Uranium", pp. 112-119, Colorado School of Mines Research Inst. (1971).
Zambrana et al, "Reprocessing of Uranium Tailings by Heap Leaching", 1980 Mining Yearbook, pp. 141-149, Colorado Mining Association (1980).
McLean, "The Technique of Acid Pagging and Curing of Ores", Atomic Energy Div., Explosives & Mining Chemicals Dept., American Cyanamide Co., (Jul. 27, 1954), 13 pp. plus 3 apendices.
Hansen Donald J.
Ramachandran Sundaresan
Skiles David O.
Balmer N. L.
Miller Edward A.
Umetco Minerals Corporation
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