CN101303907A - Back filling material for disposing radioactive waste and preparation method thereof - Google Patents
Back filling material for disposing radioactive waste and preparation method thereof Download PDFInfo
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- CN101303907A CN101303907A CNA2008100447556A CN200810044755A CN101303907A CN 101303907 A CN101303907 A CN 101303907A CN A2008100447556 A CNA2008100447556 A CN A2008100447556A CN 200810044755 A CN200810044755 A CN 200810044755A CN 101303907 A CN101303907 A CN 101303907A
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- radioactive waste
- filling material
- zeolite
- back filling
- preparation
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- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Processing Of Solid Wastes (AREA)
- Silicates, Zeolites, And Molecular Sieves (AREA)
Abstract
A radioactive waste disposal backfill material has the following compositions and weight percent ratio: bentonite is from 45 percent to 80 percent; zeolite or/and attapulgite is/are from 20 percent to 50 percent; pyrite is from 0 percent to 10 percent. The preparation method of the radioactive waste disposal backfill material comprises that: materials are prepared according to the weight percent ratio; every component is screened by a screen after being crushed; the leftovers of every component after screening are mixed evenly and are pressed by an oil jack or by other compaction equipment until the mixture density reaches from 1.5 to 1.9g/cm <3> and then the backfill material is gained. The raw material of the invention has low cost, extensive distribution and simple preparation technology; after the raw material is mixed and shaped, every property such as the engineering property and the impermeability, etc. is excellent and an excellent retardation capability is given on the radioactive wastes such as nuclide strontium, cesium, etc.
Description
Technical field
The invention belongs to a kind of is the processing radioactive contamination material and preparation method thereof of base material with the bentonitic clay, relates to a kind of back filling material for disposing radioactive waste and preparation method thereof.The back filling material for disposing radioactive waste of preparation is particularly suitable for containing the radioactive-waste disposal of strontium caesium.
Background technology
Nuclear energy is brought into play increasing effect in many countries.At present, had the nuclear more than 440 to stand in operation in the world, its generated energy accounts for 17% of gross generation, but also in constantly rising.According to the data that International Atomic Energy Agency grasped, will reach 378GW by 2010.In the nuclear energy uses process, produce many radioactive wastes that the mankind are die on.The radioactive waste that these are increasing makes existent environment of people be subjected to serious threat.Four during the last ten years, and the radioactive-waste disposal problem is vital environment problem always, and many countries extremely pay close attention to this.In recent years, flourish along with national economy, energy shortage becomes the severe problem that China is faced gradually, makes China more and more pay attention to the utilization and the development of nuclear energy.Therefore, radioactive-waste disposal has become the problem that remains urgent solution.
Radioactive waste is meant that those contain radiation α, β and gamma-emitting unstable nucleic and follow thermogenetic useless material, and main source is each key links such as nuclear fuel cycle and Development of Atomic Weapons production run, the elimination of nuclear facilities.These external military affairs, scientific research, medical treatment and industry also will produce some radioactive wastes.China is divided into high, medium and low three classes with radioactive liquid waste (GB9133-1995) by its radioactivity level, and its radioactive concentration is respectively greater than 10
-1Ci/L, 10
-1-10
-5Ci/L, 10
-5-10
-8Ci/L.The radioactive nuclide that some long half time toxicity are big, as
90Sr,
137Need such as Cs just can decay to harmless level through centuries even longer time.How it is disposed safely and effectively, it is isolated with biosphere has to greatest extent become the problem that a present Ji Dai Solution determines.
Radioactive waste disposal method generally all adopts geologic disposal concept, and its model comprises the solidification of waste body, waste packaging container, buffer and country rock.Backfilling material is filled in to be used between dedicated waste tanks and the country rock sealing and disposes the storehouse as the engineering restraining barrier of radioactive waste repository, sealing Waste disposal district, and the filling rock crevice plays dual parts chemical barrier and mechanical barrier.The requirement that used backfilling material need satisfy in the radioactive waste repository is: the hysteresis of long-time stability, mechanical property, swelling property, low permeability, nuclein migration, heat conductivity, thermal stability, radiation resistance and economy, therefore, clay mineral is a preferred material as backfilling material.
In the prior art, the bentonitic clay that with the smectite is principal ingredient is the main research object of backfilling material, bentonitic clay is good to absorption, expansion, low permeability, economy and the migration effect of radioactive waste, but mechanical property, heat conductivity etc. are not very desirable.Be necessary to add therein the adjuvant that some can improve its every performance.Both at home and abroad researcher's silica sand of adding different proportion mostly to be strengthening its engineering property, but silica sand is almost nil to the absorption property of radioactive waste, should not add too much, and result of use is relatively poor.
Summary of the invention
Purpose of the present invention is intended to overcome deficiency of the prior art, by adopting with the bentonitic clay is base material, interpolation all have good adsorption properties and every excellent properties to radioactive waste material, adopt modes such as simple mixing machinery compacting, provide that a kind of feed distribution is extensive, with low cost, preparation technology is simple, engineering property and function admirable such as impervious after the moulding, nucleic strontium caesium had back filling material for disposing radioactive waste of excellent retardation capability and preparation method thereof.
Content of the present invention is: a kind of back filling material for disposing radioactive waste, its feature part are that composition and weight percent are:
Bentonitic clay 45%～80%
Zeolite is or/and attapulgite 20%～50%
Pyrite 0～10%.
In the content of the present invention: described bentonitic clay is preferably the sodium bentonite of weight percentage 〉=50% of smectite.
In the content of the present invention: described zeolite can be a kind of, two or more the potpourri in clinoptilolite, sodium zeolite, the mordenite.
Another content of the present invention is: a kind of preparation method of back filling material for disposing radioactive waste, its feature part is to comprise the following steps:
A, batching: by bentonitic clay 45%～80%, zeolite or/and the weight percent of attapulgite 20%～50%, pyrite 0～10% is got each component;
B, screening: with via hole diameter after each component fragmentation is the screen cloth screening of 0.002mm 5mm;
C, compaction moulding: each the component screen underflow after will sieving mixes, compound is put into again steel mill (or other and pressure vessel of the prior art) by described weight percent, through hydraulic jack or other compacting equipment (can pressure under) compacting at 10～15MPa, to mixture density be 1.5～1.9g/cm
3, promptly make backfilling material.
In another content of the present invention: described bentonitic clay is preferably the sodium bentonite of weight percentage 〉=50% of smectite.
In another content of the present invention: described zeolite can be a kind of, two or more the potpourri in clinoptilolite, sodium zeolite, the mordenite.
In another content of the present invention: the aperture of screen cloth described in the step (b) is 0.002mm～0.1mm preferably.
In the invention described above content, described sodium bentonite originates from Chinese Xinjiang, zeolite and originates from that Mingguang City, Anhui is originated from Xinjiang, attapulgite, pyrite originates from river, Sichuan oil; Each feed composition also can utilize other place of production same ingredients to carry out identical proportioning.
Compared with prior art, the present invention has following characteristics and beneficial effect:
(1) during the present invention forms, bentonitic clay has good adsorption, expansion, low permeability energy, zeolite, attapulgite and pyrite all have the good adsorption performance to radioactive waste, and the engineering property of zeolite is outstanding, and pyrite can also increase the heat conductivility of potpourri;
(2) the present invention adopts cheap raw material, adopts simple mixing machinery compacting, optimizes to be integrated into a kind of back filling material for disposing radioactive waste, is easy to realize the through engineering approaches application, and has excellent every performance;
(3) cost of raw material of the present invention is cheap, widely distributed, and preparation technology is simple, and every function admirables such as engineering property, anti-permeability performance behind the starting material mixed-forming have excellent retardation capability to radioactive wastes such as nucleic strontium, caesiums, and are practical.
Embodiment
The invention will be further described to provide embodiment below; but can not be interpreted as it is limiting the scope of the invention, the person skilled in art must belong to protection scope of the present invention according to the invention described above content to some nonessential improvement and the adjustment that the present invention makes.
Embodiment 1:
A kind of back filling material for disposing radioactive waste, it is formed and weight percent is: bentonitic clay 50%, zeolite 50%;
The preparation method of back filling material for disposing radioactive waste comprises the following steps:
A, batching: the weight percent by bentonitic clay 50%, zeolite 50% is got each component;
B, screening: with via hole diameter after each component fragmentation is the screen cloth screening of 0.002mm;
C, compaction moulding: each the component screen underflow after will sieving mixes, compound is put into again steel mill by described weight percent, through hydraulic jack (under the pressure at 10～15MPa) compacting, to mixture density be 1.5～1.9g/cm
3, promptly make backfilling material;
Described bentonitic clay is the sodium bentonite of weight percentage 〉=50% of smectite;
Described zeolite can be the potpourri of a kind of, two kinds or 3 kinds in clinoptilolite, sodium zeolite, the mordenite.
The backfilling material that makes has every performances such as good engineering property, anti-permeability performance, and radioactive wastes such as nucleic strontium, caesium are had excellent retardation capability.
Embodiment 2:
A kind of back filling material for disposing radioactive waste, it is formed and weight percent is: bentonitic clay 60%, zeolite 20%, attapulgite 20%;
The preparation method of back filling material for disposing radioactive waste comprises the following steps:
A, batching: the weight percent by bentonitic clay 60%, zeolite 20%, attapulgite 20% is got each component;
B, screening: with via hole diameter after each component fragmentation is the screen cloth screening of 0.01mm;
C, compaction moulding: each the component screen underflow after will sieving mixes, compound is put into again steel mill by described weight percent, through hydraulic jack (under the pressure at 10～15MPa) compacting, to mixture density be 1.5～1.9g/cm
3, promptly make backfilling material;
Described bentonitic clay is the sodium bentonite of weight percentage 〉=50% of smectite.
Described zeolite can be the potpourri of a kind of, two kinds or 3 kinds in clinoptilolite, sodium zeolite, the mordenite;
The performance index of the backfilling material that makes are equal to embodiment 1.
Embodiment 3:
A kind of back filling material for disposing radioactive waste, it is formed and weight percent is: bentonitic clay 45%, zeolite 25%, attapulgite 25%, pyrite 5%;
The preparation method of back filling material for disposing radioactive waste comprises the following steps:
A, batching: the weight percent by bentonitic clay 45%, zeolite 25%, attapulgite 25%, pyrite 5% is got each component;
B, screening: with via hole diameter after each component fragmentation is the screen cloth screening of 0.1mm;
C, compaction moulding: each the component screen underflow after will sieving mixes, compound is put into again steel mill by described weight percent, through hydraulic jack (under the pressure at 10～15MPa) compacting, to mixture density be 1.5～1.9g/cm
3, promptly make backfilling material;
Described bentonitic clay is the sodium bentonite of weight percentage 〉=50% of smectite.
Described zeolite can be a kind of, two or more the potpourri in clinoptilolite, sodium zeolite, the mordenite.
The performance index of the backfilling material that makes are equal to embodiment 1.
Embodiment 4-25:
A kind of back filling material for disposing radioactive waste, it is formed and weight percent is: bentonitic clay 45%～80%, zeolite are or/and attapulgite 20%～50%, pyrite 0～10%, and concrete composition and weight percent are seen attached list;
The preparation method of back filling material for disposing radioactive waste comprises the following steps:
A, batching: get each component by described weight percent;
B, screening: with via hole diameter after each component fragmentation is the screen cloth screening of 0.002mm～5mm (for example: the aperture is 0.002,0.008,0.01,0.03,0.05,0.08,0.1,0.4,0.8,1,2,3,4,5mm etc.);
C, compaction moulding: each the component screen underflow after will sieving mixes, compound is put into again steel mill (or other and pressure vessel of the prior art) by described weight percent, through hydraulic jack (under the pressure at 10～15MPa) compacting, to mixture density be 1.5～1.9g/cm
3, promptly make backfilling material;
Described bentonitic clay is the sodium bentonite of weight percentage 〉=50% of smectite;
Described zeolite can be the potpourri of a kind of, two kinds or 3 kinds in clinoptilolite, sodium zeolite, the mordenite;
The place of production of described each component can be: sodium bentonite originates from Chinese Xinjiang, zeolite and originates from that Mingguang City, Anhui is originated from Xinjiang, attapulgite, pyrite originates from river, Sichuan oil; Each feed composition also can utilize other place of production same ingredients to carry out identical proportioning.
The performance index of the backfilling material that makes are equal to embodiment 1.
Subordinate list: each embodiment forms and weight percent:
The invention is not restricted to the foregoing description, content of the present invention is described all can implement and have described good result.
Claims (8)
1, a kind of back filling material for disposing radioactive waste is characterized in that composition and weight percent are:
Bentonitic clay 45%～80%
Zeolite is or/and attapulgite 20%～50%
Pyrite 0～10%.
2, by the described back filling material for disposing radioactive waste of claim 1, it is characterized in that: described bentonitic clay is the sodium bentonite of weight percentage 〉=50% of smectite.
3, by claim 1 or 2 described back filling material for disposing radioactive waste, it is characterized in that: described zeolite is a kind of, two or more the potpourri in clinoptilolite, sodium zeolite, the mordenite.
4, a kind of preparation method of back filling material for disposing radioactive waste is characterized in that comprising the following steps:
A, batching: by bentonitic clay 45%～80%, zeolite or/and the weight percent of attapulgite 20%～50%, pyrite 0～10% is got each component;
B, screening: with via hole diameter after each component fragmentation is the screen cloth screening of 0.002mm～5mm;
C, compaction moulding: each the component screen underflow after will sieving mixes, compound is put into again steel mill by described weight percent, through hydraulic jack (or other compacting equipment) compacting, to mixture density be 1.5～1.9g/cm
3, promptly make backfilling material.
5, by the preparation method of the described back filling material for disposing radioactive waste of claim 4, it is characterized in that: described bentonitic clay is the sodium bentonite of weight percentage 〉=50% of smectite.
6, by the preparation method of claim 4 or 5 described back filling material for disposing radioactive waste, it is characterized in that: described zeolite is a kind of, two or more the potpourri in clinoptilolite, sodium zeolite, the mordenite.
7, by the preparation method of claim 4 or 5 described back filling material for disposing radioactive waste, it is characterized in that: the aperture of screen cloth is 0.002mm～0.1mm described in the step (b).
8, by the preparation method of the described back filling material for disposing radioactive waste of claim 6, it is characterized in that: the aperture of screen cloth is 0.002mm～0.1mm described in the step (b).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100447556A CN101303907B (en) | 2008-06-23 | 2008-06-23 | Back filling material for disposing radioactive waste and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100447556A CN101303907B (en) | 2008-06-23 | 2008-06-23 | Back filling material for disposing radioactive waste and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101303907A true CN101303907A (en) | 2008-11-12 |
| CN101303907B CN101303907B (en) | 2011-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100447556A Expired - Fee Related CN101303907B (en) | 2008-06-23 | 2008-06-23 | Back filling material for disposing radioactive waste and preparation method thereof |
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|---|---|
| CN (1) | CN101303907B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102290112A (en) * | 2011-07-04 | 2011-12-21 | 中国核电工程有限公司 | Jacking device for nuclear waste curing process |
| CN108997691A (en) * | 2018-08-10 | 2018-12-14 | 佛山腾鲤新能源科技有限公司 | A kind of preparation method of the dedicated heat-conducting buffer material of nuclear industry radioactive waste |
| CN109734364A (en) * | 2019-03-05 | 2019-05-10 | 西南科技大学 | A kind of enhanced thermal conduction geopolymer solidification of radwaste body and preparation method thereof |
| CN110483002A (en) * | 2019-09-03 | 2019-11-22 | 湖州师范学院 | For the buffering backfilling material and preparation method thereof in high level radioactive waste repository |
| CN110563434A (en) * | 2018-05-10 | 2019-12-13 | 湖州师范学院 | Buffer backfill material for high-level radioactive waste disposal warehouse and preparation method thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE8304278L (en) * | 1983-08-04 | 1985-02-05 | Studsvik Energiteknik Ab | PROCEDURE FOR TREATMENT OF USE, RADIOACTIVE, ORGANIC ION EXCHANGE MASS |
| CN86106921A (en) * | 1986-10-23 | 1988-05-04 | 核工业部北京第五研究所 | Synthesizing of a kind of modified zeolite |
| US4950426A (en) * | 1989-03-31 | 1990-08-21 | Westinghouse Electric Corp. | Granular fill material for nuclear waste containing modules |
-
2008
- 2008-06-23 CN CN2008100447556A patent/CN101303907B/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102290112A (en) * | 2011-07-04 | 2011-12-21 | 中国核电工程有限公司 | Jacking device for nuclear waste curing process |
| CN102290112B (en) * | 2011-07-04 | 2013-12-25 | 中国核电工程有限公司 | Jacking device for nuclear waste curing process |
| CN110563434A (en) * | 2018-05-10 | 2019-12-13 | 湖州师范学院 | Buffer backfill material for high-level radioactive waste disposal warehouse and preparation method thereof |
| CN110563434B (en) * | 2018-05-10 | 2022-11-08 | 湖州师范学院 | Buffer backfill material for high-level radioactive waste disposal warehouse and preparation method thereof |
| CN108997691A (en) * | 2018-08-10 | 2018-12-14 | 佛山腾鲤新能源科技有限公司 | A kind of preparation method of the dedicated heat-conducting buffer material of nuclear industry radioactive waste |
| CN108997691B (en) * | 2018-08-10 | 2020-06-26 | 中核环保产业有限公司 | Preparation method of special heat-conducting buffer material for radioactive wastes in nuclear industry |
| CN109734364A (en) * | 2019-03-05 | 2019-05-10 | 西南科技大学 | A kind of enhanced thermal conduction geopolymer solidification of radwaste body and preparation method thereof |
| CN109734364B (en) * | 2019-03-05 | 2022-03-25 | 西南科技大学 | Heat-conduction-enhanced geopolymer radioactive waste solidified body and preparation method thereof |
| CN110483002A (en) * | 2019-09-03 | 2019-11-22 | 湖州师范学院 | For the buffering backfilling material and preparation method thereof in high level radioactive waste repository |
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| Publication number | Publication date |
|---|---|
| CN101303907B (en) | 2011-11-16 |
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