CN107845433A - A kind of MOX powder formings agent and lubricant adding method - Google Patents
A kind of MOX powder formings agent and lubricant adding method Download PDFInfo
- Publication number
- CN107845433A CN107845433A CN201610834813.XA CN201610834813A CN107845433A CN 107845433 A CN107845433 A CN 107845433A CN 201610834813 A CN201610834813 A CN 201610834813A CN 107845433 A CN107845433 A CN 107845433A
- Authority
- CN
- China
- Prior art keywords
- mox
- zinc stearate
- particle
- min speed
- mixed
- 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
- 239000000314 lubricant Substances 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000000843 powder Substances 0.000 title claims abstract description 15
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 12
- 238000009740 moulding (composite fabrication) Methods 0.000 title claims abstract description 11
- 239000002245 particle Substances 0.000 claims abstract description 37
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 claims abstract description 26
- 239000000463 material Substances 0.000 claims abstract description 10
- 239000012535 impurity Substances 0.000 claims abstract description 7
- 239000000498 cooling water Substances 0.000 claims abstract description 6
- 239000004744 fabric Substances 0.000 claims abstract description 4
- 238000002844 melting Methods 0.000 claims abstract description 4
- 230000008018 melting Effects 0.000 claims abstract description 4
- 238000012216 screening Methods 0.000 claims abstract description 4
- 238000002156 mixing Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical group [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 claims description 3
- 239000008116 calcium stearate Substances 0.000 claims description 3
- 235000013539 calcium stearate Nutrition 0.000 claims description 3
- FSWZDJUNHJMBSQ-UHFFFAOYSA-N lithium;octadecanoic acid Chemical group [Li].CCCCCCCCCCCCCCCCCC(O)=O FSWZDJUNHJMBSQ-UHFFFAOYSA-N 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 239000011701 zinc Substances 0.000 claims description 3
- 239000011230 binding agent Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011812 mixed powder Substances 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 239000000126 substance Substances 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
- G21C3/62—Ceramic fuel
- G21C3/623—Oxide fuels
-
- 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
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Lubricants (AREA)
- Powder Metallurgy (AREA)
Abstract
A kind of MOX powder formings agent and lubricant adding method, comprise the following steps：Step 1：Choose zinc stearate；Step 2：Zinc stearate particle is dried into 0.5~3h under conditions of 15~40 DEG C, 0.01~0.5Pa of vacuum, removes volatile impurity element therein, and avoids too high caused particle increase phenomenon and the fusing extremely of temperature；Step 3：Screening process is carried out to the zinc stearate particle handled through step 2 with the screen cloth of 20~100 mesh；Step 4：Required MOX grain amounts are calculated with 15~35% filling rate and are added in ball grinder, the zinc stearate particle handled through step 3 is added in MOX particles with 0.02~5.0% weight ratio, 15~38 DEG C of cooling water is passed through with 5~15L/min speed, avoids reuniting and melting phenomenon step 5 caused by material generates heat：5~45min is mixed with 1~10r/min speed, make zinc stearate particle and MOX particles tentatively well mixed, then batch mixer rotating speed is incrementally increased with 1~20r/min speed, 15~600min of mixed processing under 10~100r/min speed, avoids MOX Particle Breakages caused by being vigorously mixed.
Description
Technical field
The technology belongs to binder and lubricant addition field, and in particular to a kind of MOX powder formings agent adds with lubricant
Adding method.
Background technology
MOX powder is tiny, and mobility is poor, while MOX pellet sizes are tiny, and contains centre bore and chamfering structure, because
This, friction during in order to reduce shaping between powder particle and mold wall and mill punching, improves the Density Distribution of green compact, reduces pressing mold mill
Damage and be advantageous to be stripped, binder and lubricant should be added.
At present, the powder forming agent of traditional industries is primarily present 5 points of deficiencies with lubricant adding technique, first, MOX materials
Can spontaneous heating, and traditional binder is easily melted when heated；Second, MOX material fluidities are poor, add it is traditional into
Easily cause material apparent density and mobility to be substantially deteriorated during shape agent, have a negative impact to sintering bulk properties；Third, MOX things
The nuclear properties of material, do not allow binder to be added with solution state；Fourth, traditional lubricant adding technique is to be applied to lubricant
On mould inner wall and pressure head, it is contemplated that the radioactive nature of MOX powder, this artificial mode for smearing lubricant can not only increase people
Member by exposure time, while can also reduce production efficiency；Fifth, parameter setting unreasonable phenomena such as causing MOX Particle Breakages, is sent out
It is raw, influence the mobility and compressibility of material.
The content of the invention
It is an object of the invention to：A kind of MOX powder formings agent and lubricant adding method are devised, it is suitable by selecting
Binder, using powder lubrication by the way of, improve compact strength, improve pellet manufacture reliability.
Technical scheme is as follows：A kind of MOX powder formings agent and lubricant adding method, comprise the following steps：
Step 1：Zinc stearate is chosen, metal Zn content 10~11.2% wherein in zinc stearate, free fatty is less than
0.5%, water content is less than 0.5%, the mesh of granularity 20~200, chooses MOX particles, and granularity is 185~500 μm, specific surface area 3
~18m2/ g, impurity content are 250~2600 μ g/g, and apparent density is 15~20%TD, and filling rate flows for 78~80%, Carr
Dynamic sex index 51~65,41~48%TD of compact density；
Step 2：Zinc stearate particle is dried into 0.5~3h under conditions of 15~40 DEG C, 0.01~0.5Pa of vacuum,
Volatile impurity element therein is removed, and avoids too high caused particle increase phenomenon and the fusing extremely of temperature；
Step 3：Screening process is carried out to the zinc stearate particle handled through step 2 with the screen cloth of 20~100 mesh；
Step 4：Required MOX grain amounts are calculated with 15~35% filling rate and are added in ball grinder, will be through step
The zinc stearate particle of three processing is added in MOX particles with 0.02~5.0% weight ratio, is led to 5~15L/min speed
Enter 15~38 DEG C of cooling water, avoid reunion and melting phenomenon caused by material generates heat
Step 5：5~45min is mixed with 1~10r/min speed, zinc stearate particle and MOX particles is tentatively mixed
Uniformly, batch mixer rotating speed is then incrementally increased with 1~20r/min speed, the mixed processing under 10~100r/min speed
15~600min, avoid MOX Particle Breakages caused by being vigorously mixed.
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.
In the step 1, zinc stearate can be replaced with calcium stearate or stearic acid lithium.
The remarkable result of the present invention is：There are preferable caking property and greasy property, easily uniformly divide in mixed-powder
Dissipate, and chemical change does not occur；Softening point temperature is high, is not easy to melt because temperature raises during mixing；It is unlikely in mixed-powder
Its apparent density and mobility is substantially deteriorated because adding these materials, will not also have a negative impact to sintering bulk properties；
During heating, easily discharged from pressed compact in gas, and this gas does not influence to sinter furnace li`.
Embodiment
A kind of MOX powder formings agent and lubricant adding method, comprise the following steps：
Step 1：Zinc stearate is chosen, metal Zn content 10~11.2% wherein in zinc stearate, free fatty is less than
0.5%, water content is less than 0.5%, the mesh of granularity 20~200, chooses MOX particles, and granularity is 185~500 μm, specific surface area 3
~18m2/ g, impurity content are 250~2600 μ g/g, and apparent density is 15~20%TD, and filling rate flows for 78~80%, Carr
Dynamic sex index 51~65,41~48%TD of compact density；Zinc stearate can be replaced with calcium stearate or stearic acid lithium；
Step 2：Zinc stearate particle is dried into 0.5~3h under conditions of 15~40 DEG C, 0.01~0.5Pa of vacuum,
Volatile impurity element therein is removed, and avoids too high caused particle increase phenomenon and the fusing extremely of temperature；
Step 3：Screening process is carried out to the zinc stearate particle handled through step 2 with the screen cloth of 20~100 mesh；
Step 4：Required MOX grain amounts are calculated with 15~35% filling rate and are added in ball grinder, will be through step
The zinc stearate particle of three processing is added in MOX particles with 0.02~5.0% weight ratio, is led to 5~15L/min speed
Enter 15~38 DEG C of cooling water, avoid reunion and melting phenomenon caused by material generates heat
Step 5：5~45min is mixed with 1~10r/min speed, zinc stearate particle and MOX particles is tentatively mixed
Uniformly, batch mixer rotating speed is then incrementally increased with 1~20r/min speed, the mixed processing under 10~100r/min speed
15~600min, avoid MOX Particle Breakages caused by being vigorously mixed
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)
1. a kind of MOX powder formings agent and lubricant adding method, it is characterised in that：Comprise the following steps：
Step 1：Zinc stearate is chosen, metal Zn content 10~11.2% wherein in zinc stearate, free fatty is less than
0.5%, water content is less than 0.5%, the mesh of granularity 20~200, chooses MOX particles, and granularity is 185~500 μm, specific surface area 3
~18m2/ g, impurity content are 250~2600 μ g/g, and apparent density is 15~20%TD, and filling rate flows for 78~80%, Carr
Dynamic sex index 51~65,41~48%TD of compact density；
Step 2：Zinc stearate particle is dried into 0.5~3h under conditions of 15~40 DEG C, 0.01~0.5Pa of vacuum, removed
Volatile impurity element therein, and avoid too high caused particle increase phenomenon and the fusing extremely of temperature；
Step 3：Screening process is carried out to the zinc stearate particle handled through step 2 with the screen cloth of 20~100 mesh；
Step 4：With 15~35% filling rate calculate needed for MOX grain amounts and be added in ball grinder, will be through step 3 at
The zinc stearate particle of reason is added in MOX particles with 0.02~5.0% weight ratio, and 15 are passed through with 5~15L/min speed
~38 DEG C of cooling water, avoid reunion and melting phenomenon caused by material generates heat
Step 5：5~45min is mixed with 1~10r/min speed, makes the tentatively mixing of zinc stearate particle and MOX particles equal
It is even, batch mixer rotating speed is then incrementally increased with 1~20r/min speed, the mixed processing 15 under 10~100r/min speed
~600min, avoid MOX Particle Breakages caused by being vigorously mixed.
2. a kind of MOX powder formings agent according to claim 1 and lubricant adding method, it is characterised in that：Also include
Step 6：Batch mixer rotating speed is progressively reduced with 1~10r/min speed until stopping, after stopping 5~30min of mixing, being closed cold
But water.
3. a kind of MOX powder formings agent according to claim 1 and lubricant adding method, it is characterised in that：The step
In rapid one, zinc stearate can be replaced with calcium stearate or stearic acid lithium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610834813.XA CN107845433B (en) | 2016-09-20 | 2016-09-20 | A kind of MOX powder forming agent and lubricant adding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610834813.XA CN107845433B (en) | 2016-09-20 | 2016-09-20 | A kind of MOX powder forming agent and lubricant adding method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107845433A true CN107845433A (en) | 2018-03-27 |
| CN107845433B CN107845433B (en) | 2019-09-17 |
Family
ID=61657402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610834813.XA Active CN107845433B (en) | 2016-09-20 | 2016-09-20 | A kind of MOX powder forming agent and lubricant adding method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107845433B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110164574A (en) * | 2019-07-02 | 2019-08-23 | 中国原子能科学研究院 | A kind of preparation method of cellular fuel pellet |
Citations (10)
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|---|---|---|---|---|
| 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 |
| 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 |
| EP1482517B1 (en) * | 2003-05-28 | 2009-05-06 | Euratom | Process for producing nuclear fuel pellets of the mox type |
| 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 |
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2016
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| 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 |
| EP1482517B1 (en) * | 2003-05-28 | 2009-05-06 | 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 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110164574A (en) * | 2019-07-02 | 2019-08-23 | 中国原子能科学研究院 | A kind of preparation method of cellular fuel pellet |
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| Publication number | Publication date |
|---|---|
| CN107845433B (en) | 2019-09-17 |
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Effective date of registration: 20200806 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: 20231028 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. |