A kind of uranium purification method of ammonium diuranate

A technology of ammonium diuranate and a purification method, which is applied in the field of uranium purification of ammonium diuranate, can solve problems such as the limitation of selection of processing and procurement, and achieve the effect of expanding the scope of application

Active Publication Date: 2018-11-30
THE 404 COMPANY LIMITED CHINA NAT NUCLEAR
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Problems solved by technology

[0006] In the process of uranium purification and conversion, the adaptability of existing equipment to raw materials of different sources, chemical forms and impurity composition is directly related to the limitation of processing and purchasing of raw materials for uranium purification and conversion

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  • A kind of uranium purification method of ammonium diuranate

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Embodiment Construction

[0036] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0037] Through the analysis of the dissolution reaction principle of ammonium diuranate and U3O8, the main difference is that the dissolution of ammonium diuranate in nitric acid produces ammonium nitrate without the generation of gas, while the dissolution of U3O8 in nitric acid is accompanied by nitrogen oxides. The generation of gas, there will be no introduction of other impurities; this patent proposes such as figure 1 The following technical solutions are shown:

[0038] A method for purifying uranium of ammonium diuranate, comprising the following steps:

[0039] (1) dissolve

[0040] The material is ammonium diuranate with a uranium content of 70-75wt% mixed with uranium-containing substances;

[0041] Add the material into the nitric acid solution with an acidity of 5-10mol / L through a star feeder for dis...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B60/02C22B3/38C22B3/22
CPCC22B3/22C22B60/026C22B60/0286C22B3/381
Inventor 魏刚马晓文茹发全侯彦龙周会琴冯秀燕高月华李浩然李振峰李英锋
Owner THE 404 COMPANY LIMITED CHINA NAT NUCLEAR
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