Uranium purification method for ammonium biuranate

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: 2017-05-10
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 fo

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  • Uranium purification method for ammonium biuranate

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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 dissolution and purification treatment technologies for ammonium biuranate in the uranium purification and conversion process, in particular to the technologies of dissolution of the ammonium biuranate, extraction and purification treatment of a uranyl nitrate solution and the like and provides a uranium purification method for the ammonium biuranate. The uranium purification method for the ammonium biuranate comprises the following steps that (1) dissolution is conducted so as to prepare a qualified uranyl nitrate solution for extraction and purification; (2) extraction is conducted, the solution to be extracted and an extraction agent are mixed and conduct matter transfer in a pulse extraction column, uranium in the material is carried into the extraction agent, and an organic phase containing the uranium is obtained; (3) washing is conducted, the organic phase containing the uranium and a washing agent are fully mixed and conduct matter transfer in a pulse washing column, impurity elements in the organic phase containing the uranium are rewashed and enter a water phase, the purity of the uranium is further improved, and the purified organic phase containing the uranium is obtained; and (4) reverse extraction is conducted, the purified organic phase containing the uranium and the washing agent are fully mixed and conduct matter transfer in the pulse washing column, the uranium enters the water phase again through reverse extraction, the purified uranyl nitrate solution is obtained, and an uranium oxide is prepared from the purified uranyl nitrate solution through concentration and denitration manners.

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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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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