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a kind of uo 2 Method for sintering pellets horizontally in sintering furnace

A sintering furnace and pellet technology, applied in the direction of uranium oxide/hydroxide, etc., to achieve the effects of reducing pollution waste, stabilizing the production process, and increasing production capacity

Active Publication Date: 2017-06-20
CNNC JIANZHONG NUCLEAR FUEL
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a horizontal sintering production process to solve the shortcomings of the existing stacking vertical sintering process with boat frames

Method used

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  • a kind of uo <sub>2</sub> Method for sintering pellets horizontally in sintering furnace
  • a kind of uo <sub>2</sub> Method for sintering pellets horizontally in sintering furnace
  • a kind of uo <sub>2</sub> Method for sintering pellets horizontally in sintering furnace

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Embodiment Construction

[0030] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0031] A kind of UO 2 The method for sintering pellets horizontally in a sintering furnace is characterized in that it comprises the following steps:

[0032] (1) Determine the molybdenum boat and V-shaped plate

[0033] The molybdenum boat of the original pusher boat furnace is still used for horizontal sintering. The length of the molybdenum boat is 260mm and the width is 134mm;

[0034] In order to meet the requirements of horizontal sintered pellet placement, a molybdenum V-shaped plate is placed under the molybdenum boat, such as image 3 As shown, a molybdenum V-shaped plate is placed on the lower part of the molybdenum boat, and the V-shaped plate is closely attached to the molybdenum boat, and its thickness is 2mm; in this embodiment, the material of the V-shaped plate is molybdenum-lanthanum alloy, and the...

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Abstract

The invention belongs to the field of manufacture of nuclear fuel elements for nuclear power plants, and particularly relates to a transverse sintering method of UO2 pellets in a sintering furnace.The method particularly comprises the following steps that 1, a molybdenum boat and a V-shaped plate are determined; 2, parameters of pellet green bodies are determined; 3, a transverse sintering and boat loading technology is determined; 4, a transverse sintering technology is determined.By adopting the transverse sintering technology, the pellet loading capacity of a sinter boat can be increased by 30%; under the conditions that the density of the green bodies is (5.90-6.10) g / cm<3> and the boat loading layer number is 11,12 and 13, the density of the pellets in a pellet boat can meet the technological condition requirement; in the range of the control target rho<average>+ / -0.5% T.D, distribution of the density in layers and the density among the layers is uniform, and all the physical and chemical properties meet the technological condition requirement and are superior to data of vertically-sintered products; the finished product rate of produced application display pellets is superior to that of the vertically-sintered pellets, and the transverse sintering technology of the pellets can completely meet the production requirements.

Description

technical field [0001] The invention belongs to the field of manufacturing nuclear fuel elements for nuclear power plants, and in particular relates to a UO 2 The method of sintering the pellets horizontally in the sintering furnace. Background technique [0002] UO 2 Fuel pellets are produced through a powder metallurgy manufacturing process, UO 2 The powder is pressed into a green block by a press, and then sintered and ground to produce a finished pellet. UO 2 Pellet sintering is one of the key processes in pellet manufacturing. The sintering process plays a decisive role in the final performance of the product. The sintering operation consists of the green block loading boat, entering the furnace, flowing gas, heating, heat preservation, cooling and discharge. and other steps. At present, the sintering of the pellets in the production line of the workshop adopts the stacking vertical boat frame sintering process, and its process is UO 2 After the powder is pressed ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G43/01
Inventor 廖宾王友良陈煜邓话谭朝晖朱奎钟鹏鹤
Owner CNNC JIANZHONG NUCLEAR FUEL
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