Process for preparing UO3 through uranyl nitrate air-blast atomization dry pyrolysis denitration

A technology of uranyl nitrate and atomization drying is applied in the field of uranium purification, which can solve the problems of unfavorable reduction and low chemical reaction activity, and achieve the effects of high conversion rate, good chemical reaction activity and simple process.

Inactive Publication Date: 2017-09-15
THE 404 COMPANY LIMITED CHINA NAT NUCLEAR
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AI Technical Summary

Problems solved by technology

[0004] However, the UNH denitrification method to prepare UO 3 The main problem that exists is UO 3 The chemical reactivity is low, which is not conducive to UO 3 Restore and UO 2 Hydrofluorination process technical requirements, need for UO 3 Activation treatment to improve UO 3 Product chemical reactivity

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  • Process for preparing UO3 through uranyl nitrate air-blast atomization dry pyrolysis denitration
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  • Process for preparing UO3 through uranyl nitrate air-blast atomization dry pyrolysis denitration

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specific Embodiment approach

[0063] Establish a process test system for UO3 preparation by uranyl nitrate airflow atomization, drying and pyrolysis; establish a UO3 product sampling and analysis system. The specific implementation is as follows:

[0064] 1. According to the processing capacity of the equipment, design the main equipment such as the combustion chamber and the denitration reactor through the heat balance calculation and material balance calculation.

[0065] 2. Process the corresponding equipment according to the designed equipment structure parameters, select other auxiliary equipment, build support and maintenance platforms according to equipment size and location requirements, install equipment, and establish uranium nitrate with combustion chamber and denitrification reactor as the main equipment Process system for preparing UO3 by acyl denitration.

[0066] 3. Control the optimal temperature, water vapor partial pressure and gas-liquid ratio to achieve the effect of UO3 preparation by uranyl...

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Abstract

The invention discloses a process for preparing UO3 through uranyl nitrate air-blast atomization dry pyrolysis denitration. According to the process, a designed and processed combustion chamber and a denitration reactor are adopted as main body equipment of uranyl nitrate pyrolysis denitration, a high-temperature high-speed gas generated from combustion of propane and excessive air is adopted as a heat source and an atomization gas source, and a uranyl nitrate liquid is subjected to drying dehydration and pyrolysis denitration. The process has the advantages of being short in process procedure, simple in equipment structure, stable in operation and high in UNH (Uranyl-Nitrate Hexahydrate) conversion rate, the prepared UO3 is uniform in granularity distribution and good in chemical reaction activity, and the like.

Description

Technical field [0001] The invention relates to the technical field of uranium purification, in particular to the preparation of UO by pyrolysis of uranyl nitrate hexahydrate solution for denitration 3 The process technology method is to use the high temperature and high-speed airflow generated by the combustion of propane to atomize, dehydrate and dry the uranyl nitrate hexahydrate solution and denitrify to prepare UO with higher activity 3 Process technology. Background technique [0002] In the field of nuclear fuel production, U 3 O 8 , UO 3 And UO 2 They are three important uranium oxides with practical value. Among them, UO 3 As an intermediate product in the production process of uranium purification, its preparation technology occupies a very important position in the nuclear fuel cycle process. [0003] At present, in the field of uranium purification technology at home and abroad, UO 3 The preparation process can be divided into UNH (UNL) method, ADU method, AUC method th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G43/01
CPCC01G43/01C01P2006/12
Inventor 耿龙任喜彦孙玉鹤牛玉印魏刚张慧忠高兴星李立璟王晓东王俊
Owner THE 404 COMPANY LIMITED CHINA NAT NUCLEAR
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