CN111063459A - MOX mixed particle treatment method - Google Patents
MOX mixed particle treatment method Download PDFInfo
- Publication number
- CN111063459A CN111063459A CN201911299923.0A CN201911299923A CN111063459A CN 111063459 A CN111063459 A CN 111063459A CN 201911299923 A CN201911299923 A CN 201911299923A CN 111063459 A CN111063459 A CN 111063459A
- Authority
- CN
- China
- Prior art keywords
- mox
- ball milling
- mixing
- mixed
- treatment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000002245 particle Substances 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 41
- 238000000498 ball milling Methods 0.000 claims abstract description 58
- 238000002156 mixing Methods 0.000 claims abstract description 55
- 239000000463 material Substances 0.000 claims abstract description 34
- 238000003672 processing method Methods 0.000 claims abstract description 20
- 238000003756 stirring Methods 0.000 claims description 26
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 claims description 16
- 239000008187 granular material Substances 0.000 claims description 10
- 238000005469 granulation Methods 0.000 claims description 7
- 230000003179 granulation Effects 0.000 claims description 7
- 238000012216 screening Methods 0.000 claims description 6
- 238000013329 compounding Methods 0.000 claims description 3
- 239000008188 pellet Substances 0.000 abstract description 8
- 239000000446 fuel Substances 0.000 abstract description 5
- 238000012797 qualification Methods 0.000 abstract description 4
- 241000255969 Pieris brassicae Species 0.000 abstract description 2
- 229910044991 metal oxide Inorganic materials 0.000 abstract description 2
- 150000004706 metal oxides Chemical class 0.000 abstract description 2
- 238000002360 preparation method Methods 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 description 4
- 238000013461 design Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000009700 powder processing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C3/00—Reactor fuel elements and their assemblies; Selection of substances for use as reactor fuel elements
- G21C3/42—Selection of substances for use as reactor fuel
- G21C3/58—Solid reactor fuel Pellets made of fissile material
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Developing Agents For Electrophotography (AREA)
Abstract
The invention relates to the technical field of nuclear-grade metal oxide particle preparation, and particularly discloses a MOX mixed particle treatment method, which comprises the following steps: the method comprises the following steps: ball milling treatment; step two: mixing materials; step three: granulating; step four: and (5) mixing and spheroidizing. The method solves the phenomenon of large white blocks in the microstructure of the pellets, realizes the improvement of the MOX mixed particle processing method, and the MOX fuel particles obtained by the method meet the requirements of materials for developing the MOX fuel pellets and improve the qualification rate of MOX pellet products.
Description
Technical Field
The invention belongs to the technical field of nuclear-grade metal oxide particle preparation, and particularly relates to a MOX mixed particle treatment method.
Background
At present, in the traditional MOX mixed particle treatment process, the MOX mixed particle is mainly treated by the procedures of ball milling, mixing, granulating and mixing spheroidization. The early experimental result shows that the obvious 'big white block' phenomenon often appears in the core block metallographic microstructure prepared by adopting the traditional MOX mixed particle processing method, and the reason for analyzing the phenomenon is that the MOX core block product is unqualified due to uneven powder mixing in the early powder processing process.
In order to solve the above problems, it is necessary to design a new method for processing mixed particles.
Disclosure of Invention
The invention aims to provide a MOX mixed particle processing method to improve the qualification rate of MOX pellet products.
The technical scheme of the invention is as follows:
a MOX mixed particle processing method comprises the following steps:
the method comprises the following steps: ball milling treatment
Dividing the total ball milling time into a plurality of small cycles, standing for a period of time after each small cycle is finished, opening a ball milling tank to check the material state, and stirring the mixed material by adopting a manual intervention mode;
step two: compounding process
Screening the MOX mixed particles obtained by the first step, adding zinc stearate, manually stirring and mixing, and adding into a three-dimensional mixer for mixing;
step three: granulation treatment
Transferring the mixed granules processed in the step two into a granulating process for granulating, and controlling the roller pressure to be 10-20 kN in the granulating process;
step four: mixed spheroidizing
Adding the mixed particles obtained by the third treatment into a spheroidizing tank, adding zinc stearate, manually stirring and mixing, adding into a three-dimensional mixer, and mixing for 1.5-2 h; and then, detecting the apparent density and the tap density of the particles by an apparent density instrument, stopping the mixing and spheroidizing treatment when the two groups of data are in the required range, and otherwise, repeatedly carrying out the mixing and spheroidizing treatment.
In the first step, the total ball milling time of 60min is divided into 13 small cycles, the ball milling treatment is carried out for 1min in the 1 st small cycle, then the ball milling tank is opened after the ball milling treatment is carried out for 5min to check the material state, and the mixed material is stirred in a manual intervention mode;
starting the 2 nd minor cycle after uniform stirring, carrying out ball milling treatment for 4min, standing for 5min, opening a ball milling tank to check the material state, and carrying out stirring treatment on the mixed material by adopting a manual intervention mode;
and then carrying out ball milling treatment for 5min in 11 small cycles, standing for 5min respectively, and then stirring the mixed materials in a manual intervention mode.
In the first step, ball milling treatment is carried out on each small cycle at the rotating speed of 350-600 rpm.
In the first step, the manual intervention mode is manual stirring operation.
In the second step, 0.05 to 0.10 wt.% of zinc stearate is added.
And in the second step, mixing is carried out by adopting the technological parameters of 15-40 rpm of rotating speed and 1.5-2 h of mixing.
In step three, granulation was repeated three times to enhance the flowability of the granules.
And in the fourth step, adding the mixed particles obtained by the third step into a spheroidizing tank according to the filling rate of 40-60%.
In step four, 0.25 wt.% zinc stearate was added.
In the fourth step, mixing at a rotation speed of 15-40 rpm.
The invention has the following remarkable effects:
(1) the method solves the phenomenon of large white blocks in the microstructure of the pellets, realizes the improvement of the MOX mixed particle processing method, and the MOX fuel particles obtained by the method meet the requirements of materials for developing the MOX fuel pellets and improve the qualification rate of MOX pellet products.
(2) The method is also suitable for the treatment process of other nuclear grade oxide mixed particles, has good treatment effect and high reliability, and meets the requirements of process stability and qualification rate.
Detailed Description
The present invention will be described in further detail with reference to specific examples.
A MOX mixed particle processing method comprises the following steps:
the method comprises the following steps: ball milling treatment
Dividing the total ball milling time of 60min into 13 small cycles, carrying out ball milling treatment on the 1 st small cycle at the rotating speed of 350-600 rpm for 1min, standing for 5min, opening a ball milling tank to check the material state, and stirring the mixed material in a manual intervention mode;
starting the 2 nd small cycle after uniform stirring, performing ball milling treatment for 4min at the rotating speed of 350-600 rpm, standing for 5min, opening a ball milling tank to check the material state, and performing stirring treatment on the mixed material in a manual intervention mode;
and then 11 small cycles are carried out, wherein the rotating speed is 350-600 rpm, the ball milling time is 5min, and the mixed materials are stirred in a manual intervention mode after being respectively kept stand for 5 min.
Step two: compounding process
Screening the MOX mixed particles obtained through the first step, adding 0.05-0.10 wt.% of zinc stearate, manually stirring and mixing, adding into a three-dimensional mixer, and mixing at a rotation speed of 15-40 rpm for 1.5-2 h.
Step three: granulation treatment
And (4) transferring the mixed granules processed in the step two into a granulating process for granulating, controlling the pressure of a roller to be 10-20 kN in the granulating process, and repeating granulation for three times to enhance the flowability of the granules.
Step four: mixed spheroidizing
Adding the mixed particles obtained by the third step into a spheroidizing tank according to the filling rate of 40-60%, adding 0.25 wt.% of zinc stearate, manually stirring and mixing, adding into a three-dimensional mixer, and mixing at the rotating speed of 15-40 rpm for 1.5-2 h; and then, detecting the apparent density and the tap density of the particles by an apparent density instrument, stopping the mixing and spheroidizing treatment when the two groups of data are in the required range, and otherwise, repeatedly carrying out the mixing and spheroidizing treatment.
Example one
A MOX mixed particle processing method comprises the following steps:
(1): ball milling treatment, namely dividing the total ball milling treatment time of 60min into 13 small cycles, firstly carrying out ball milling treatment for 1min at the rotating speed of 400rpm, standing for 5min, then opening a ball milling tank to check the material state, and stirring the mixed material in a manual stirring manner; after uniform stirring, continuing ball milling for 4min at the rotating speed of 400rpm, standing for 5min, opening a ball milling tank to check the material state, and stirring the mixed material in a manual intervention mode; and then ball milling treatment is carried out on the 11 small cycles by adopting a ball milling process with the rotating speed of 400rpm and the ball milling time of 5 min.
(2): and (3) mixing, namely screening the MOX mixed particles obtained by the first step, adding 0.05 wt.% of zinc stearate, manually stirring, mixing, uniformly viewing, adding into a three-dimensional mixer, and mixing by adopting the technological parameters of 25rpm and 2 h.
(3): and (4) granulating, namely transferring the mixed granules treated in the step two into a granulating process for granulating, controlling the pressure of a roller to be 10-20 kN in the granulating process, and repeating granulation for three times to enhance the flowability of the granules.
(4): mixing and spheroidizing, namely adding the mixed particles obtained by the third step into a spheroidizing tank according to the filling rate of 40-60%, adding 0.25 wt.% of zinc stearate, primarily mixing, adding into a three-dimensional mixer, and mixing for 2 hours at the rotating speed of 25 rpm; and then, detecting the apparent density and the tap density of the particles by an apparent density instrument, stopping the mixing and spheroidizing treatment when the two groups of data are in the required range, and otherwise, repeatedly carrying out the mixing and spheroidizing treatment.
The MOX fuel pellet metallographic microstructure obtained by the processing method has no white block phenomenon, and is obviously improved compared with the traditional method.
Example two
A MOX mixed particle processing method comprises the following steps:
(1): ball milling treatment, namely dividing the total ball milling treatment time of 60min into 13 small cycles, firstly carrying out ball milling treatment for 1min at a rotating speed of 450rpm, standing for 5min, then opening a ball milling tank to check the material state, and carrying out stirring treatment on the mixed material in a manual intervention mode. After the mixture is uniformly stirred, the ball milling treatment is continuously carried out for 4min at the rotating speed of 450rpm, the ball milling tank is opened after the mixture is kept stand for 5min to check the material state, and the mixed material is stirred in a manual intervention mode. And then ball milling treatment is carried out on the 11 small cycles by adopting a ball milling process with the rotating speed of 450rpm and the ball milling time of 5 min.
(2): and (3) mixing, namely screening the MOX mixed particles obtained by the first step, adding 0.05 wt.% of zinc stearate, primarily mixing, adding into a three-dimensional mixer, and mixing by adopting the process parameters of the rotating speed of 30rpm and the mixing time of 1.5 h.
(3): and (4) granulating, namely transferring the mixed granules treated in the step two into a granulating process for granulating, and controlling the pressure of a roller to be 10-20 kN in the granulating process.
(4): mixing and spheroidizing, namely adding the mixed particles obtained by the third step into a spheroidizing tank according to the filling rate of 40-60%, adding 0.25 wt.% of zinc stearate, primarily mixing, adding into a three-dimensional mixer, and mixing for 1.5h at the rotating speed of 30 rpm; and then, detecting the apparent density and the tap density of the particles by an apparent density instrument, stopping the mixing and spheroidizing treatment when the two groups of data are in the required range, and otherwise, repeatedly carrying out the mixing and spheroidizing treatment.
EXAMPLE III
A MOX mixed particle processing method comprises the following steps:
(1): ball milling treatment, namely dividing the total ball milling treatment time of 60min into 13 small cycles, firstly carrying out ball milling treatment for 1min at the rotating speed of 500rpm, standing for 5min, then opening a ball milling tank to check the material state, and carrying out stirring treatment on the mixed material in a manual intervention mode. After the mixture is uniformly stirred, the ball milling treatment is continuously carried out for 4min at the rotating speed of 500rpm, the ball milling tank is opened after the mixture is kept stand for 5min to check the material state, and the mixed material is stirred in a manual intervention mode. And then ball milling treatment is carried out on the 11 small cycles by adopting a ball milling process with the rotating speed of 500rpm and the ball milling time of 5 min.
(2): and (3) mixing, namely screening the MOX mixed particles obtained by the first step, adding 0.10 wt.% of zinc stearate, primarily mixing, adding into a three-dimensional mixer, and mixing by adopting the process parameters of the rotation speed of 30rpm and the mixing time of 2 hours.
(3): and (4) granulating, namely transferring the mixed granules treated in the step two into a granulating process for granulating, and controlling the pressure of a roller to be 10-20 kN in the granulating process.
(4): mixing and spheroidizing, namely adding the mixed particles obtained by the third step into a spheroidizing tank according to the filling rate of 40-60%, adding 0.25 wt.% of zinc stearate, primarily mixing, adding into a three-dimensional mixer, and mixing for 2 hours at the rotating speed of 30 rpm; and then, detecting the apparent density and the tap density of the particles by an apparent density instrument, stopping the mixing and spheroidizing treatment when the two groups of data are in the required range, and otherwise, repeatedly carrying out the mixing and spheroidizing treatment.
Claims (10)
1. A MOX mixed particle processing method is characterized in that: the method comprises the following steps:
the method comprises the following steps: ball milling treatment
Dividing the total ball milling time into a plurality of small cycles, standing for a period of time after each small cycle is finished, opening a ball milling tank to check the material state, and stirring the mixed material by adopting a manual intervention mode;
step two: compounding process
Screening the MOX mixed particles obtained by the first step, adding zinc stearate, manually stirring and mixing, and adding into a three-dimensional mixer for mixing;
step three: granulation treatment
Transferring the mixed granules processed in the step two into a granulating process for granulating, and controlling the roller pressure to be 10-20 kN in the granulating process;
step four: mixed spheroidizing
Adding the mixed particles obtained by the third treatment into a spheroidizing tank, adding zinc stearate, manually stirring and mixing, adding into a three-dimensional mixer, and mixing for 1.5-2 h; and then, detecting the apparent density and the tap density of the particles by an apparent density instrument, stopping the mixing and spheroidizing treatment when the two groups of data are in the required range, and otherwise, repeatedly carrying out the mixing and spheroidizing treatment.
2. The MOX hybrid particle processing method of claim 1, wherein: in the first step, the total ball milling time of 60min is divided into 13 small cycles, the ball milling treatment is carried out for 1min in the 1 st small cycle, then the ball milling tank is opened after the ball milling treatment is carried out for 5min to check the material state, and the mixed material is stirred in a manual intervention mode;
starting the 2 nd minor cycle after uniform stirring, carrying out ball milling treatment for 4min, standing for 5min, opening a ball milling tank to check the material state, and carrying out stirring treatment on the mixed material by adopting a manual intervention mode;
and then carrying out ball milling treatment for 5min in 11 small cycles, standing for 5min respectively, and then stirring the mixed materials in a manual intervention mode.
3. The MOX hybrid particle processing method of claim 2, wherein: in the first step, ball milling treatment is carried out on each small cycle at the rotating speed of 350-600 rpm.
4. The MOX mixed particle processing method of claim 3, wherein: in the first step, the manual intervention mode is manual stirring operation.
5. The MOX hybrid particle processing method of claim 1, wherein: in the second step, 0.05 to 0.10 wt.% of zinc stearate is added.
6. The MOX mixed particle processing method of claim 5, wherein: and in the second step, mixing is carried out by adopting the technological parameters of 15-40 rpm of rotating speed and 1.5-2 h of mixing.
7. The MOX hybrid particle processing method of claim 1, wherein: in step three, granulation was repeated three times to enhance the flowability of the granules.
8. The MOX hybrid particle processing method of claim 1, wherein: and in the fourth step, adding the mixed particles obtained by the third step into a spheroidizing tank according to the filling rate of 40-60%.
9. The MOX hybrid particle processing method of claim 8, wherein: in step four, 0.25 wt.% zinc stearate was added.
10. The MOX hybrid particle processing method of claim 9, wherein: in the fourth step, mixing at a rotation speed of 15-40 rpm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911299923.0A CN111063459B (en) | 2019-12-17 | 2019-12-17 | MOX mixed particle treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911299923.0A CN111063459B (en) | 2019-12-17 | 2019-12-17 | MOX mixed particle treatment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111063459A true CN111063459A (en) | 2020-04-24 |
| CN111063459B CN111063459B (en) | 2023-10-20 |
Family
ID=70301949
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911299923.0A Active CN111063459B (en) | 2019-12-17 | 2019-12-17 | MOX mixed particle treatment method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111063459B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3230280A (en) * | 1962-07-03 | 1966-01-18 | Atomic Energy Authority Uk | Process of producing spheroids of nuclear fuel materials by agglomeration |
| CN1890759A (en) * | 2003-10-06 | 2007-01-03 | 原子能委员会 | Method of producing pellets of a nuclear fuel based on mixed oxide (U,Pu)O2 or (U,Th)O2 |
| CN103345951A (en) * | 2013-06-21 | 2013-10-09 | 中国原子能科学研究院 | (U, np) O2transmutation fuel pellet and target preparation process |
| CN106521219A (en) * | 2017-01-05 | 2017-03-22 | 重庆大学 | Preparation method for TiC particle reinforced titanium-based porous material |
| CN107610796A (en) * | 2017-08-29 | 2018-01-19 | 中核四0四有限公司 | The unqualified Powder Recovery method of MOX preparation process |
| CN107761022A (en) * | 2017-09-28 | 2018-03-06 | 青海大学 | A kind of mixed phase enhancing magnesium-based composite material and preparation method thereof |
| CN107837760A (en) * | 2016-09-20 | 2018-03-27 | 中核四〇四有限公司 | A kind of MOX powder method of granulating |
| CN107837761A (en) * | 2016-09-20 | 2018-03-27 | 中核四〇四有限公司 | A kind of MOX powder rolls spheronization process |
-
2019
- 2019-12-17 CN CN201911299923.0A patent/CN111063459B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3230280A (en) * | 1962-07-03 | 1966-01-18 | Atomic Energy Authority Uk | Process of producing spheroids of nuclear fuel materials by agglomeration |
| CN1890759A (en) * | 2003-10-06 | 2007-01-03 | 原子能委员会 | Method of producing pellets of a nuclear fuel based on mixed oxide (U,Pu)O2 or (U,Th)O2 |
| CN103345951A (en) * | 2013-06-21 | 2013-10-09 | 中国原子能科学研究院 | (U, np) O2transmutation fuel pellet and target preparation process |
| CN107837760A (en) * | 2016-09-20 | 2018-03-27 | 中核四〇四有限公司 | A kind of MOX powder method of granulating |
| CN107837761A (en) * | 2016-09-20 | 2018-03-27 | 中核四〇四有限公司 | A kind of MOX powder rolls spheronization process |
| CN106521219A (en) * | 2017-01-05 | 2017-03-22 | 重庆大学 | Preparation method for TiC particle reinforced titanium-based porous material |
| CN107610796A (en) * | 2017-08-29 | 2018-01-19 | 中核四0四有限公司 | The unqualified Powder Recovery method of MOX preparation process |
| CN107761022A (en) * | 2017-09-28 | 2018-03-06 | 青海大学 | A kind of mixed phase enhancing magnesium-based composite material and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111063459B (en) | 2023-10-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102219667B (en) | Higher fatty acid metal salt and preparation method thereof | |
| CN110790541A (en) | Method for preparing artificial aggregate by utilizing recycled micro powder | |
| CN102633445B (en) | Device and method for slaking active lime for sintering | |
| CN111063459A (en) | MOX mixed particle treatment method | |
| CN108941572A (en) | The preparation method of feeding for metal powder injection molding | |
| CN102151824A (en) | Method for preparing coarse particle molybdenum powder by preliminary compression granulation | |
| CN106147265A (en) | Rice husk plastic-wood section and preparation method thereof | |
| CN103304933B (en) | A kind of medical electric wire polyvinyl chloride semiconduction composite flexible material and its production and use | |
| CN102998197B (en) | Method for judging reduced sample preparation uniformity of solid powder | |
| CN101845172A (en) | Polypropylene high-filled toughening masterbatch and preparation method thereof | |
| DE3912298A1 (en) | METHOD FOR DEWARNING AND IMPROVING THE PROPERTIES OF INJECTION MOLDED METAL PARTS | |
| CN108585722B (en) | Cement-based curing material for curing waste liquid containing high-concentration boric acid nuclei and curing method thereof | |
| DE2439538A1 (en) | Oral medicament preparations of delayed release type - produced by granulating active components and binding agents in a cogwheel granulator | |
| CN104099168A (en) | Powder metallurgy lubricating agent | |
| CN105884235B (en) | A method of superelevation strong rubber gel material is prepared using granulated blast-furnace slag | |
| CN103882223B (en) | A kind of method improving red soil nickel ore bursting temperature of pellet ores | |
| CN111118300A (en) | Dust removal ball pressing forming method | |
| CN102964090B (en) | High-fluidity ferrite-nylon granule material and preparation method thereof | |
| CN111014698A (en) | Granulating method of MOX mixed powder | |
| CN109727696B (en) | MOX pellet recycling method | |
| CN107845432B (en) | A kind of MOX ball-milled powder method for mixing | |
| CN109777041A (en) | A kind of spherical resin base brush composite material and preparation method | |
| CN114105510B (en) | Method for producing cement additive by utilizing metallurgical solid waste | |
| CN113845733B (en) | Polypropylene blend material filled with waste rubber powder and preparation method thereof | |
| CN108190902A (en) | A kind of method that calcium-base bentonite makes inorganic gel sodium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |