Process and apparatus for continuous leaching of ores

Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Radioactive metal

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423 3, 423 17, 4236585, 423 1, 423 27, 423 68, 423150, 75101R, C01G 4300, C01G 300, C01G 3100, C01G 5300

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active

042255635

ABSTRACT:
A process for the continuous leaching of ores and an apparatus for practicing this continuous leaching process are disclosed. According to this process, a plurality of unit layers composed of a pulverized uranium ore or other ore are continuously laminated while a minimum necessary amount of an acid, alkali or organic solvent (hereinafter referred to as "solvent") is uniformly sprinkled on the flat surfaces of these unit layers. In the state where the concentration of the solvent mixed into the ore is maintained at a high level, the heat generated by exothermic reaction caused by contact among the solvent, ore and water is effectively stored and used for thermally curing the ore. According to this process, the speed of extraction of the intended metal component can be increased, the leaching time shortened and the filtration characteristics improved, whereby a highly concentrated pregnant liquor can be recovered at a high efficiency.

REFERENCES:
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patent: 4017309 (1977-04-01), Johnson
patent: 4120935 (1978-10-01), Fountain et al.
Marshall, "Nuclear Engineering International", Mar. 1977, pp. 66-68.
Leger et al., "World Mining", May 1974, pp. 40-42.
Smith et al., "The Chemical Engineer", Dec. 1972, pp. 440-444.
Takada et al., "IAEA-SM-135/14", pp. 97-110.
Sato et al., "Proceedings of 3rd International Conference on Peaceful Uses of Atomic Energy", United Nations, N.Y., 1965, vol. 12, pp. 222-230.

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