METHOD FOR RECOVERING URANIUM-CONTAINING ASH Russian patent published in 2005 - IPC

Abstract RU 2264671 C1

FIELD: recovery of solid radioactive wastes.

SUBSTANCE: proposed method for recovering uranium-containing ash includes ash drying, pulverization, thermal treatment, double-stage leaching, filtering, and sedimentation. In the process carbon-ammonia salts are added to pulverized ash and the latter is mixed up with them. Heat treatment is conducted at temperature of 550 - 600 °C. Both leaching stages involve use of mixture of acids NHO₃ and HCl taken in proportion 1 : 3. Uranium-containing solution is settled down in ammonia solution upon filtering and insoluble sediment is washed with water and conveyed to disposal area.

EFFECT: enhanced degree of uranium extraction.

1 cl, 1 tbl, 1 ex

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RU 2 264 671 C1

Authors

Aleksandrov A.B.

Drobjaz A.I.

Khlytin A.L.

Terent'Ev A.I.

Dates

2005-11-20—Published

2004-02-06—Filed