CN107845432B - A kind of MOX ball-milled powder method for mixing - Google Patents
A kind of MOX ball-milled powder method for mixing Download PDFInfo
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- CN107845432B CN107845432B CN201610832675.1A CN201610832675A CN107845432B CN 107845432 B CN107845432 B CN 107845432B CN 201610832675 A CN201610832675 A CN 201610832675A CN 107845432 B CN107845432 B CN 107845432B
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- Prior art keywords
- mox
- speed
- zinc stearate
- ball
- particle
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- 238000002156 mixing Methods 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000000843 powder Substances 0.000 title claims abstract description 12
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 claims abstract description 24
- 239000002245 particle Substances 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 13
- 239000012535 impurity Substances 0.000 claims abstract description 8
- 239000000498 cooling water Substances 0.000 claims abstract description 7
- 238000002844 melting Methods 0.000 claims abstract description 6
- 230000008018 melting Effects 0.000 claims abstract description 6
- 238000012216 screening Methods 0.000 claims abstract description 4
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000011701 zinc Substances 0.000 claims description 3
- 235000014113 dietary fatty acids Nutrition 0.000 claims 1
- 229930195729 fatty acid Natural products 0.000 claims 1
- 239000000194 fatty acid Substances 0.000 claims 1
- 150000004665 fatty acids Chemical class 0.000 claims 1
- 238000001035 drying Methods 0.000 abstract description 3
- 239000008188 pellet Substances 0.000 description 6
- 239000011148 porous material Substances 0.000 description 6
- 239000000446 fuel Substances 0.000 description 5
- 235000013339 cereals Nutrition 0.000 description 4
- 238000000498 ball milling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 235000021588 free fatty acids Nutrition 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 235000011868 grain product Nutrition 0.000 description 1
- 238000010237 hybrid technique Methods 0.000 description 1
- 239000003758 nuclear fuel Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000008961 swelling Effects 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)
- Lubricants (AREA)
- Developing Agents For Electrophotography (AREA)
- Powder Metallurgy (AREA)
Abstract
A kind of MOX ball-milled powder method for mixing, it is characterised in that: the following steps are included: step 1: MOX particle is chosen；Step 2: drying 0.5~5h for zinc stearate under conditions of 20~50 DEG C, 0.1~1.0Pa of vacuum degree, remove volatile impurity element therein, and the excessively high caused particle of temperature is avoided to increase phenomenon extremely；Step 3: screening process is carried out to the zinc stearate handled through step 2 with the sieve of 20~200 mesh；Step 4: required MOX grain amount is calculated with 15~35% filling rate and is added in ball grinder, the zinc stearate obtained will be handled through step 3 again to be added in ball grinder with 0.05~1.5% weight ratio, 10~40 DEG C of cooling water is passed through with the speed of 1~50L/min, it avoids reuniting and melting phenomenon step 5 caused by generating heat because of material: 5~30min is mixed using the speed of 1~5r/min, it is uniformly mixed zinc stearate and MOX particle tentatively, then batch mixer revolving speed is incrementally increased with the speed of 1~10r/min, 15~800min of mixed processing under the speed of 10~300r/min.
Description
Technical field
The technology belongs to mixing field, and in particular to a kind of MOX ball-milled powder method for mixing.
Background technique
The burnup of fast reactor fuel is higher, the swelling of fuel when in order to accommodate high burnup, it is necessary in fuel pellet preparation process
Middle addition pore creating material controls fuel pellet density, it is ensured that safety in utilization of the pellet in reactor.Mox fuel product requirement
Pellet density is 93%-96%TD, and stomata equivalent diameter is not more than 10 μm.
Currently, the ball-milled powder mixing technology of traditional industries is primarily present 4 points of deficiencies, first is that mixing efficiency is not high, cause
The processing time is long, increases the irradiation time of operator；Second is that MOX ball milling particle is tiny, material fluidity is poor, traditional mixing
Parameter setting is unreasonable to will lead to the phenomenon that MOX powder is reunited, and reduces mixed effect；Third is that MOX material can generate heat, cause
There is melting phenomenon in conventional additive；Fourth is that the density variation of MOX ball-milled powder and pore creating material is big, it is existing not only to will appear layering
As also will appear pore creating material reunion, pore size in product pellet caused not meet index request.
Summary of the invention
It is an object of the invention to: this patent devises a kind of MOX ball-milled powder method for mixing, mixes by using solid
Technology, improve mixed processing efficiency, reduce personnel's irradiation level；Rationally setting revolving speed and rotation time, avoid being layered, and improve
Compounding effect；Reasonable pore creating material is selected, melting phenomenon caused by generating heat because of material is avoided to occur.
Technical scheme is as follows: a kind of MOX ball-milled powder method for mixing, it is characterised in that: the following steps are included:
Step 1: choosing MOX particle, and grain graininess is 0.1~0.9 μm, and specific surface area is 8~30m2/ g, uniformity
97.2~99.9%, 100~1500 μ g/g of impurity content；Zinc stearate is chosen, metal Zn content 10 in zinc stearate~
11.2%, free fatty acid is less than 0.5%, and water content is less than 0.5%, 20~200 mesh of granularity；
Step 2: drying 0.5~5h for zinc stearate under conditions of 20~50 DEG C, 0.1~1.0Pa of vacuum degree, removal
Volatile impurity element therein, and the excessively high caused particle of temperature is avoided to increase phenomenon extremely；
Step 3: screening process is carried out to the zinc stearate handled through step 2 with the sieve of 20~200 mesh；
Step 4: required MOX grain amount is calculated with 15~35% filling rate and is added in ball grinder, then will be through step
The zinc stearate that rapid three processing obtains is added in ball grinder with 0.05~1.5% weight ratio, with the speed of 1~50L/min
It is passed through 10~40 DEG C of cooling water, avoids reunion and melting phenomenon caused by generating heat because of material
Step 5: 5~30min is mixed using the speed of 1~5r/min, mixes zinc stearate and MOX particle tentatively
It is even, batch mixer revolving speed is then incrementally increased with the speed of 1~10r/min, the mixed processing 15 under the speed of 10~300r/min
~800min
In the step 1, zinc stearate can be replaced with polyethanol.
Further include step 6: with the speed of 1~10r/min gradually reduce batch mixer revolving speed until stop, stop mixing 5~
After 30min, cooling water is closed.
Remarkable result of the invention is: technically simple, Yi Shixian, securely and reliably can be applied to MOX ball mill mixing
In treatment process.Using ball milling particle and pore creating material, the hybrid particles product being prepared using above-mentioned technique is through examining product
Granularity is 5~180 μm, and specific surface area is 2~30m2/ g, uniformity are 97.5~99.9%, and impurity content is 150~2500 μ
G/g illustrates that hybrid technique obtains in this patent grain products meet mox fuel pellet and prepare materials requirement.
Specific embodiment
A kind of MOX ball-milled powder method for mixing, comprising the following steps:
Step 1: choosing MOX particle, and grain graininess is 0.1~0.9 μm, and specific surface area is 8~30m2/ g, uniformity
97.2~99.9%, 100~1500 μ g/g of impurity content；Zinc stearate is chosen, metal Zn content 10 in zinc stearate~
11.2%, free fatty acid is less than 0.5%, and water content is less than 0.5%, 20~200 mesh of granularity；Zinc stearate can use polyethanol
Instead of
Step 2: drying 0.5~5h for zinc stearate under conditions of 20~50 DEG C, 0.1~1.0Pa of vacuum degree, removal
Volatile impurity element therein, and the excessively high caused particle of temperature is avoided to increase phenomenon extremely；
Step 3: screening process is carried out to the zinc stearate handled through step 2 with the sieve of 20~200 mesh；
Step 4: required MOX grain amount is calculated with 15~35% filling rate and is added in ball grinder, then will be through step
The zinc stearate that rapid three processing obtains is added in ball grinder with 0.05~1.5% weight ratio, with the speed of 1~50L/min
It is passed through 10~40 DEG C of cooling water, avoids reunion and melting phenomenon caused by generating heat because of material
Step 5: 5~30min is mixed using the speed of 1~5r/min, mixes zinc stearate and MOX particle tentatively
It is even, batch mixer revolving speed is then incrementally increased with the speed of 1~10r/min, the mixed processing 15 under the speed of 10~300r/min
~800min
Step 6: gradually reducing batch mixer revolving speed with the speed of 1~10r/min until stopping, and stops 5~30min of mixing
Afterwards, cooling water is closed.
Claims (2)
1. a kind of MOX ball-milled powder method for mixing, it is characterised in that: the following steps are included:
Step 1: choosing MOX particle, and grain graininess is 0.1~0.9 μm, and specific surface area is 8~30m2/ g, uniformity 97.2~
99.9%, 100~1500 μ g/g of impurity content；Zinc stearate is chosen, metal Zn content 10~11.2% in zinc stearate dissociates
Fatty acid is less than 0.5%, and water content is less than 0.5%, 20~200 mesh of granularity；
Step 2: zinc stearate is dried into 0.5~5h under conditions of 20~50 DEG C, 0.1~1.0Pa of vacuum degree, removal is wherein
Volatile impurity element, and avoid temperature it is excessively high caused by particle extremely increase phenomenon；
Step 3: screening process is carried out to the zinc stearate handled through step 2 with the sieve of 20~200 mesh；
Step 4: required MOX grain amount is calculated with 15~35% filling rate and is added in ball grinder, then will be through step 3
The zinc stearate that processing obtains is added in ball grinder with 0.05~1.5% weight ratio, is passed through with the speed of 1~50L/min
10~40 DEG C of cooling water avoids reunion and melting phenomenon caused by generating heat because of material；
Step 5: 5~30min is mixed using the speed of 1~5r/min, is uniformly mixed zinc stearate and MOX particle tentatively, so
Batch mixer revolving speed is incrementally increased with the speed of 1~10r/min afterwards, under the speed of 10~300r/min mixed processing 15~
800min。
2. a kind of MOX ball-milled powder method for mixing according to claim 1, it is characterised in that: further include step 6: with 1
The speed of~10r/min gradually reduces batch mixer revolving speed until stopping, and after stopping 5~30min of mixing, closes cooling water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610832675.1A CN107845432B (en) | 2016-09-20 | 2016-09-20 | A kind of MOX ball-milled powder method for mixing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610832675.1A CN107845432B (en) | 2016-09-20 | 2016-09-20 | A kind of MOX ball-milled powder method for mixing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107845432A CN107845432A (en) | 2018-03-27 |
| CN107845432B true CN107845432B (en) | 2019-09-17 |
Family
ID=61656472
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610832675.1A Active CN107845432B (en) | 2016-09-20 | 2016-09-20 | A kind of MOX ball-milled powder method for mixing |
Country Status (1)
| Country | Link |
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| CN (1) | CN107845432B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE785239A (en) * | 1971-06-22 | 1972-10-16 | Commissariat Energie Atomique | POWDER MIXER AND LUBRICATOR |
| GB2038073A (en) * | 1978-11-30 | 1980-07-16 | Electric Power Res Inst | Method for homogenizing mixed oxide nuclear fuels |
| WO2001018822A1 (en) * | 1999-09-06 | 2001-03-15 | European Community (Ec) | Method for producing nuclear fuel pellets of the mox type |
| EP1482517A1 (en) * | 2003-05-28 | 2004-12-01 | Euratom | Process for producing nuclear fuel pellets of the mox type |
| CN1781588A (en) * | 2004-12-02 | 2006-06-07 | 中国核动力研究设计院 | （U，Gd）O2Material mixing process and material mixing equipment for preparing burnable poison core block |
| 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 |
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| CN101449338A (en) * | 2006-05-24 | 2009-06-03 | 原子能委员会 | Process for reprocessing a spent nuclear fuel and of preparing a mixed uranium-plutonium oxide |
| CN101467216A (en) * | 2006-06-15 | 2009-06-24 | 比利格核股份有限公司 | Criticality prevention devices and methods in nuclear fuel production |
| 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 |
-
2016
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE785239A (en) * | 1971-06-22 | 1972-10-16 | Commissariat Energie Atomique | POWDER MIXER AND LUBRICATOR |
| GB2038073A (en) * | 1978-11-30 | 1980-07-16 | Electric Power Res Inst | Method for homogenizing mixed oxide nuclear fuels |
| WO2001018822A1 (en) * | 1999-09-06 | 2001-03-15 | European Community (Ec) | Method for producing nuclear fuel pellets of the mox type |
| EP1482517A1 (en) * | 2003-05-28 | 2004-12-01 | Euratom | Process for producing nuclear fuel pellets of the mox type |
| CN1934656A (en) * | 2003-09-29 | 2007-03-21 | 联邦国家统一企业A·A·博奇瓦尔全俄无机材料研究院 | Method for producing ceramic nuclear fuel tablets, device and container for carrying out said method |
| 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 |
| CN1781588A (en) * | 2004-12-02 | 2006-06-07 | 中国核动力研究设计院 | （U，Gd）O2Material mixing process and material mixing equipment for preparing burnable poison core block |
| CN101449338A (en) * | 2006-05-24 | 2009-06-03 | 原子能委员会 | Process for reprocessing a spent nuclear fuel and of preparing a mixed uranium-plutonium oxide |
| CN101467216A (en) * | 2006-06-15 | 2009-06-24 | 比利格核股份有限公司 | Criticality prevention devices and methods in nuclear fuel production |
| 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 |
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| CN107845432A (en) | 2018-03-27 |
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| TR01 | Transfer of patent right |
Effective date of registration: 20201023 Address after: 610000 South Tianfu Avenue 888, Huayang Street, Tianfu New District, Chengdu City, Sichuan Province Patentee after: CNNC 404 Chengdu nuclear technology engineering design and Research Institute Co.,Ltd. Address before: 508 box 1, box 732850, Lanzhou City, Gansu Province Patentee before: THE 404 COMPANY LIMITED, CHINA NATIONAL NUCLEAR Corp. |
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Effective date of registration: 20230807 Address after: 732850 Gansu Mining Area, Qilihe District, Lanzhou City, Gansu Province Patentee after: THE 404 COMPANY LIMITED, CHINA NATIONAL NUCLEAR Corp. Patentee after: CNNC 404 Chengdu nuclear technology engineering design and Research Institute Co.,Ltd. Address before: No. 888, South Tianfu Avenue, Huayang street, Tianfu New District, Chengdu, Sichuan 610000 Patentee before: CNNC 404 Chengdu nuclear technology engineering design and Research Institute Co.,Ltd. |
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