MOX mixed particle treatment method

A processing method and particle technology, applied in the field of preparation of nuclear-grade metal oxide particles, can solve the problems of large white lumps, uneven powder mixing, unqualified MOX pellet products, etc. Effects of Stability and Yield Requirements

Active Publication Date: 2020-04-24
THE 404 COMPANY LIMITED CHINA NAT NUCLEAR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The results of previous experiments show that the metallographic microstructure of the pellets prepared by the traditional MOX mixed particle treatment method often has obvious "big white lumps". Product failed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A method for processing MOX mixed particles, comprising the following steps:

[0043] (1): Ball milling treatment, the total time of ball milling treatment is 60min divided into 13 small cycles, firstly adopt the speed of 400rpm ball milling treatment for 1min, after standing for 5min, open the ball milling tank to check the state of the material, and stir the mixed material by manual stirring Processing: After stirring evenly, continue to use ball milling at 400rpm for 4 minutes, open the ball mill tank after standing for 5 minutes to check the material status, and use manual intervention to stir the mixed material; after that, the 11 small cycles are all at 400rpm, and the ball milling time is 5 minutes. Ball milling process for ball milling.

[0044] (2): Mixing treatment, add 0.05wt.% zinc stearate to the MOX mixed granules obtained in step 1 after sieving, mix them by hand and mix them visually evenly, then add them into a three-dimensional mixer at a speed of 25rp...

Embodiment 2

[0049] A method for processing MOX mixed particles, comprising the following steps:

[0050] (1): Ball milling treatment. The total time of ball milling treatment is 60 minutes and divided into 13 small cycles. First, ball milling treatment is carried out at a speed of 450 rpm for 1 minute. After standing for 5 minutes, the ball mill tank is opened to check the state of the material, and the mixed material is stirred by manual intervention. deal with. After stirring evenly, continue to use ball milling at 450rpm for 4 minutes. After standing for 5 minutes, open the ball mill tank to check the state of the material, and use manual intervention to stir the mixed material. Afterwards, the 11 small cycles all adopt the ball milling process with a rotating speed of 450rpm and a ball milling time of 5min for ball milling.

[0051] (2): Mixing treatment, adding 0.05wt.% zinc stearate to the MOX mixed granules obtained through step 1 after sieving and initially mixing, then adding to...

Embodiment 3

[0055] A method for processing MOX mixed particles, comprising the following steps:

[0056](1): Ball milling treatment. The total time of ball milling treatment is 60 minutes and divided into 13 small cycles. First, ball milling treatment is performed at a speed of 500 rpm for 1 minute. After standing for 5 minutes, the ball mill tank is opened to check the state of the material, and the mixed material is stirred by manual intervention. deal with. After stirring evenly, continue to use 500rpm ball milling for 4 minutes, open the ball milling tank after standing for 5 minutes to check the state of the material, and use manual intervention to stir the mixed material. Afterwards, the 11 small cycles all adopt the ball milling process with a rotating speed of 500rpm and a ball milling time of 5min for ball milling.

[0057] (2): Mixing treatment, after sieving the MOX mixed particles obtained in step 1, add 0.10wt.% zinc stearate for preliminary mixing and then add them to the t...

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PUM

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Abstract

The invention relates to the technical field of nuclear-grade metal oxide particle preparation, and particularly discloses an MOX mixed particle treatment method which comprises the following steps: step 1, ball milling treatment; step 2, mixing treatment; step 3, granulation treatment; and step 4, mixing and spheroidizing. According to the method, the phenomenon of 'large white blocks' in the microstructure of pellets is avoided, the MOX mixed particle treatment method is improved, the MOX fuel particles obtained through the method meet the material requirement for MOX fuel pellet development, and the percent of pass of MOX pellet products is increased.

Description

technical field [0001] The invention belongs to the technical field of preparation of nuclear-grade metal oxide particles, and in particular relates to a method for treating MOX mixed particles. Background technique [0002] At present, in the traditional MOX mixed granule treatment process, the processes of ball milling, mixing, granulation, and mixing spheroidization are mainly used to process MOX mixed granules. The results of previous experiments show that the metallographic microstructure of the pellets prepared by the traditional MOX mixed particle treatment method often has obvious "big white lumps". The product is substandard. [0003] In order to solve the above problems, it is urgent to design a new treatment method for mixed particles. Contents of the invention [0004] The object of the invention is to provide a method for processing MOX mixed particles, so as to improve the qualified rate of MOX pellet products. [0005] Technical scheme of the present inve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C3/58
CPCG21C3/58Y02E30/30
Inventor 祁磊张顺孝刘鹏屠振华郭亮杨廷贵朱桐宇刘家礼张万德杨欢欢谷磊罗超刘雪峰陈元林吴金德蒲小斌张彦龙王军平张翔刘勇彭传洋张欢欢李凯
Owner THE 404 COMPANY LIMITED CHINA NAT NUCLEAR
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