A kind of uranium purification method of ammonium diuranate

Abstract

The invention belongs to the technical field of dissolving and purifying ammonium diuranate in the process of purifying and converting uranium, and specifically includes technologies such as dissolving ammonium diuranate, extracting and purifying uranyl nitrate solution, and the like. It includes the following steps: (1) dissolving, preparing a qualified uranyl nitrate solution for extraction and purification; (2) extracting, mixing and mass-transferring the extraction stock solution and the extraction agent in the pulse extraction column, and carrying the uranium in the material into the extraction (3) washing, the organic phase containing uranium and the detergent are fully mixed and mass-transferred in the pulse washing column, and the impurity elements in the organic phase containing uranium are re-washed into the water phase to further improve the Purified uranium-containing organic phase is obtained; (4) back extraction, the purified uranium-containing organic phase and detergent are fully mixed and mass-transferred in the pulse washing column, and the uranium is back-extracted into the water phase again, The purified uranyl nitrate solution is obtained; the purified uranyl nitrate solution is then concentrated and denitrated to prepare uranium oxide.

Description

technical field

[0001] The invention belongs to the technical field of dissolving and purifying ammonium diuranate in the process of purifying and converting uranium, and specifically includes technologies such as dissolving ammonium diuranate, extracting and purifying uranyl nitrate solution, and the like. Background technique

[0002] The current public uranium purification conversion production line construction project production line adopts the front-end wet purification technology, and the uranium ore concentrate (U 3 o 8 ) as a raw material, which was dissolved, extracted and purified to obtain a uranyl nitrate solution. After the uranyl nitrate solution is evaporated and concentrated, UO can be obtained by denitrification 3 , UO 3 After hydration to improve the activity, UO can be prepared by reduction 2 . UO 2 UF that meets the technical conditions of natural uranium hexafluoride is produced through hydrofluorination, fluorination, condensation and liquefactio...

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