Natural uranium hexafluoride gas-phase transfer system and natural uranium hexafluoride gas-phase transfer method

A gas-phase transfer and uranium hexafluoride technology, which is applied in the field of natural uranium hexafluoride gas-phase transfer, can solve the problems such as the lack of application of purification and transfer, and achieves easy realization of control conditions, improves direct yield, and reduces the risk of liquid-phase transfer. Effect

Active Publication Date: 2017-07-07
THE 404 CO LTD CHINA NAT NUCLEAR
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Problems solved by technology

In summary, the purification and centralized treatment of the second and third stage condensers in the world are mainly based on the methods of condensation liquefaction and

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  • Natural uranium hexafluoride gas-phase transfer system and natural uranium hexafluoride gas-phase transfer method

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[0024] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0025] At 101.325kPa, UF 6 When heated to 56.4°C, it can be directly sublimated without melting. Therefore, as long as the temperature of the auxiliary cold trap is controlled above the sublimation point, UF can be realized. 6 gas phase transfer. In addition, in the fluorine gas produced by medium-temperature electrolysis, the content of hydrogen fluoride is generally 4% to 10%. 6 There is a large difference between the sublimation point (56.4 ℃), therefore, the temperature of the auxiliary cold trap is controlled at the boiling point of hydrogen fluoride and UF 6 between the sublimation points, can effectively UF 6 Hydrogen fluoride in the removal. at UF 6 During the preparation process, most of the non-volatile metal fluoride impurities enter the slag tank collector with the fluoride slag, but some of them enter the cold trap with the ...

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Abstract

The invention belongs to the technical field of natural uranium hexafluoride gas-phase transfer, in particular to a natural uranium hexafluoride gas-phase transfer system and a natural uranium hexafluoride gas-phase transfer method. A secondary condenser and a tertiary condenser are arranged above two electronic scales respectively, and ethylene glycol and steam serve as a cold medium and a heat medium respectively. The secondary condenser is provided with two outlets, one of the outlets is connected to an inlet of a primary condenser through a valve J1, and the other outlet is connected to an inlet of the tertiary condenser through a valve J2, a valve J3, a valve J4 and a valve J5. The tertiary condenser is provided with two outlets, one of the outlets is connected to the inlet of the primary condenser through the valve J5 and a valve J7, and the other outlet is connected to an external tail gas treatment process system through a valve J6 and a valve J8. By the system and the method, assistance in pressure-relieved purification and gas-phase transfer of UF6 products in a cold trap can be realized, purity of the natural UF6 products is improved, the metal direct recovery rate is increased, and safety risks in a transfer process are reduced.

Description

technical field [0001] The invention belongs to the technical field of gas phase transfer of natural uranium hexafluoride, and in particular relates to a gas phase transfer system and method of natural uranium hexafluoride. Background technique [0002] In the natural uranium conversion production process, in order to improve the capture efficiency of UF6, the second and third condensers are used as auxiliary cold traps. When the UF6 products in the auxiliary cold traps are captured to the specified value, the Perform purification and transfer. In the process of purification and transfer, UF6 vapor phase transfer is an important technology. [0003] Internationally, most of the UF6 products in the secondary and tertiary condensers used as auxiliary cold traps are transferred to corresponding product containers in liquid form. For example: the Cole conversion plant in the United States adopts the condensation solidification method, and uses the second and third condensers a...

Claims

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Application Information

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IPC IPC(8): B01D8/00C01G43/06
CPCB01D8/00C01G43/063
Inventor 魏刚张慧忠任喜彦陈建勇李子云何平李英锋陈俭刚陈阵李浩然
Owner THE 404 CO LTD CHINA NAT NUCLEAR
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