CN107845432A - A kind of MOX ball-milled powders method for mixing - Google Patents
A kind of MOX ball-milled powders method for mixing Download PDFInfo
- Publication number
- CN107845432A CN107845432A CN201610832675.1A CN201610832675A CN107845432A CN 107845432 A CN107845432 A CN 107845432A CN 201610832675 A CN201610832675 A CN 201610832675A CN 107845432 A CN107845432 A CN 107845432A
- Authority
- CN
- China
- Prior art keywords
- mox
- zinc stearate
- min speed
- ball
- mixing
- 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.)
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Links
- 238000002156 mixing Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000000843 powder Substances 0.000 title claims abstract description 13
- 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
- 239000004744 fabric Substances 0.000 claims abstract description 4
- 238000012216 screening Methods 0.000 claims abstract description 4
- 239000011701 zinc Substances 0.000 claims description 4
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 235000019422 polyvinyl alcohol Nutrition 0.000 claims description 3
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims 1
- 239000002253 acid Substances 0.000 claims 1
- 125000001931 aliphatic group Chemical group 0.000 claims 1
- 229910052725 zinc Inorganic materials 0.000 claims 1
- 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
- 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
Abstract
A kind of MOX ball-milled powders method for mixing, it is characterised in that：Comprise the following steps：Step 1：Choose MOX particles；Step 2：Zinc stearate is dried into 0.5~5h under conditions of 20~50 DEG C, 0.1~1.0Pa of vacuum, removes volatile impurity element therein, and avoids the too high caused particle of temperature increase phenomenon extremely；Step 3：Screening process is carried out to the zinc stearate handled through step 2 with the screen cloth of 20~200 mesh；Step 4：Required MOX grain amounts are calculated with 15~35% filling rate and are 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 1~50L/min speed, avoids reuniting and melting phenomenon step 5 caused by material generates heat：5~30min is mixed using 1~5r/min speed, makes zinc stearate and MOX particles tentatively well mixed, batch mixer rotating speed is then incrementally increased with 1~10r/min speed, 15~800min of mixed processing under 10~300r/min speed.
Description
Technical field
The technology belongs to batch mixing field, and in particular to a kind of MOX ball-milled powders method for mixing.
Background technology
The burnup of fast reactor fuel is higher, the swelling of fuel during in order to accommodate high burnup, it is necessary in fuel pellet preparation process
Middle addition pore creating material, control 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.
At present, the ball-milled powder mixing technology of traditional industries is primarily present 4 points of deficiencies, first, mixing efficiency is not high, causes
Processing time is grown, and increases the exposure time of operating personnel；Second, MOX ball milling particles are tiny, material fluidity is poor, traditional batch mixing
Parameter setting is unreasonable to cause MOX powder the phenomenon reunited occur, and reduce mixed effect；Third, MOX materials can generate heat, cause
There is melting phenomenon in conventional additive；Fourth, the density variation of MOX ball-milled powders and pore creating material is big, not only occur that layering is existing
As also occurring that pore creating material is reunited, causing pore size in product pellet not meet index request.
The content of the invention
It is an object of the invention to：This patent devises a kind of MOX ball-milled powders method for mixing, is mixed by using solid
Technology, improve mixed processing efficiency, reduce personnel's irradiation level；Rotating speed and rotation time are rationally set, avoid being layered, is improved
Compounding effect；Rational pore creating material is selected, avoids the melting phenomenon caused by material generates heat from occurring.
Technical scheme is as follows：A kind of MOX ball-milled powders method for mixing, it is characterised in that：Comprise the following steps：
Step 1：MOX particles are chosen, grain graininess is 0.1~0.9 μm, and specific surface area is 8~30m2/ g, uniformity
97.2~99.9%, the μ g/g of impurity content 100~1500；Zinc stearate is chosen, metal Zn content 10 in zinc stearate~
11.2%, free fatty is less than 0.5%, and water content is less than 0.5%, the mesh of granularity 20~200；
Step 2：Zinc stearate is dried into 0.5~5h under conditions of 20~50 DEG C, 0.1~1.0Pa of vacuum, removed
Volatile impurity element therein, and avoid the too high caused particle of temperature increase phenomenon extremely；
Step 3：Screening process is carried out to the zinc stearate handled through step 2 with the screen cloth of 20~200 mesh；
Step 4：Required MOX grain amounts are calculated with 15~35% filling rate and are 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 1~50L/min speed
10~40 DEG C of cooling water is passed through, avoids reunion and melting phenomenon caused by material generates heat
Step 5：5~30min is mixed using 1~5r/min speed, makes the tentatively mixing of zinc stearate and MOX particles equal
It is even, batch mixer rotating speed is then incrementally increased with 1~10r/min speed, the mixed processing 15 under 10~300r/min speed
~800min
In the step 1, zinc stearate can be replaced with PVOH.
Also include step 6：Batch mixer rotating speed is progressively reduced with 1~10r/min speed until stopping, stopping mixing 5~
After 30min, cooling water is closed.
The remarkable result of the present invention is：Technology is simple, easily realizes, can securely and reliably be applied to MOX ball mill mixings
In processing procedure.Using ball milling particle and pore creating material, using the hybrid particles product that above-mentioned technique is prepared 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, illustrate that hybrid technique obtains in this patent grain products meet mox fuel pellet and prepare materials requirement.
Embodiment
A kind of MOX ball-milled powders method for mixing, comprises the following steps：
Step 1：MOX particles are chosen, grain graininess is 0.1~0.9 μm, and specific surface area is 8~30m2/ g, uniformity
97.2~99.9%, the μ g/g of impurity content 100~1500；Zinc stearate is chosen, metal Zn content 10 in zinc stearate~
11.2%, free fatty is less than 0.5%, and water content is less than 0.5%, the mesh of granularity 20~200；Zinc stearate can use PVOH
Instead of
Step 2：Zinc stearate is dried into 0.5~5h under conditions of 20~50 DEG C, 0.1~1.0Pa of vacuum, removed
Volatile impurity element therein, and avoid the too high caused particle of temperature increase phenomenon extremely；
Step 3：Screening process is carried out to the zinc stearate handled through step 2 with the screen cloth of 20~200 mesh；
Step 4：Required MOX grain amounts are calculated with 15~35% filling rate and are 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 1~50L/min speed
10~40 DEG C of cooling water is passed through, avoids reunion and melting phenomenon caused by material generates heat
Step 5：5~30min is mixed using 1~5r/min speed, makes the tentatively mixing of zinc stearate and MOX particles equal
It is even, batch mixer rotating speed is then incrementally increased with 1~10r/min speed, the mixed processing 15 under 10~300r/min speed
~800min
Step 6：Batch mixer rotating speed is progressively reduced with 1~10r/min speed until stopping, stopping 5~30min of mixing
Afterwards, cooling water is closed.
Claims (3)
- A kind of 1. MOX ball-milled powders method for mixing, it is characterised in that：Comprise the following steps：Step 1：MOX particles are chosen, grain graininess is 0.1~0.9 μm, and specific surface area is 8~30m2/ g, uniformity 97.2~ 99.9%, the μ g/g of impurity content 100~1500；Zinc stearate is chosen, metal Zn content 10~11.2% in zinc stearate, is dissociated Aliphatic acid is less than 0.5%, and water content is less than 0.5%, the mesh of granularity 20~200；Step 2：Zinc stearate is dried into 0.5~5h under conditions of 20~50 DEG C, 0.1~1.0Pa of vacuum, removed wherein Volatile impurity element, and avoid temperature it is too high caused by particle extremely increase phenomenon；Step 3：Screening process is carried out to the zinc stearate handled through step 2 with the screen cloth of 20~200 mesh；Step 4：Required MOX grain amounts are calculated with 15~35% filling rate and are 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 1~50L/min speed 10~40 DEG C of cooling water, avoid reunion and melting phenomenon caused by material generates heatStep 5：5~30min is mixed using 1~5r/min speed, makes zinc stearate and MOX particles tentatively well mixed, so Batch mixer rotating speed is incrementally increased with 1~10r/min speed afterwards, under 10~300r/min speed mixed processing 15~ 800min。
- A kind of 2. MOX ball-milled powders method for mixing according to claim 1, it is characterised in that：In the step 1, hard Sour zinc can be replaced with PVOH.
- A kind of 3. MOX ball-milled powders method for mixing according to claim 1, it is characterised in that：Also include step 6：With 1 ~10r/min speed progressively reduces batch mixer rotating 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 true CN107845432A (en) | 2018-03-27 |
| CN107845432B 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 |
|---|---|
| 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 | Material mixing process and device for preparing (U, Gd) 02 combustible poisonous 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 |
| 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 |
| 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
- 2016-09-20 CN CN201610832675.1A patent/CN107845432B/en active Active
Patent 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 |
| 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 | Material mixing process and device for preparing (U, Gd) 02 combustible poisonous 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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| Publication number | Publication date |
|---|---|
| CN107845432B (en) | 2019-09-17 |
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| GR01 | Patent grant | ||
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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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| TR01 | Transfer of patent right |
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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| TR01 | Transfer of patent right |