CN105439520B - A kind of method for preparing radiation-proof plate - Google Patents
A kind of method for preparing radiation-proof plate Download PDFInfo
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- CN105439520B CN105439520B CN201410438339.XA CN201410438339A CN105439520B CN 105439520 B CN105439520 B CN 105439520B CN 201410438339 A CN201410438339 A CN 201410438339A CN 105439520 B CN105439520 B CN 105439520B
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- 238000000034 method Methods 0.000 title claims abstract description 25
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims abstract description 41
- 239000006185 dispersion Substances 0.000 claims abstract description 25
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 20
- 239000002253 acid Substances 0.000 claims abstract description 13
- 239000003513 alkali Substances 0.000 claims abstract description 6
- 239000000835 fiber Substances 0.000 claims description 24
- 238000009413 insulation Methods 0.000 claims description 21
- 239000011490 mineral wool Substances 0.000 claims description 14
- 239000011230 binding agent Substances 0.000 claims description 9
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical group [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 9
- 239000000920 calcium hydroxide Substances 0.000 claims description 9
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 9
- 235000011116 calcium hydroxide Nutrition 0.000 claims description 9
- 239000003349 gelling agent Substances 0.000 claims description 9
- 239000012744 reinforcing agent Substances 0.000 claims description 8
- 229920002472 Starch Polymers 0.000 claims description 7
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical group [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims description 7
- 239000004927 clay Substances 0.000 claims description 7
- 239000008394 flocculating agent Substances 0.000 claims description 7
- 235000019698 starch Nutrition 0.000 claims description 7
- 239000008107 starch Substances 0.000 claims description 7
- 239000004113 Sepiolite Substances 0.000 claims description 5
- 239000010440 gypsum Substances 0.000 claims description 5
- 229910052602 gypsum Inorganic materials 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 claims description 5
- 229910052624 sepiolite Inorganic materials 0.000 claims description 5
- 235000019355 sepiolite Nutrition 0.000 claims description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 4
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 4
- 229920002401 polyacrylamide Polymers 0.000 claims description 4
- 239000010456 wollastonite Substances 0.000 claims description 4
- 229910052882 wollastonite Inorganic materials 0.000 claims description 4
- 229910052599 brucite Inorganic materials 0.000 claims description 3
- 235000019353 potassium silicate Nutrition 0.000 claims description 2
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 2
- 239000002699 waste material Substances 0.000 abstract description 9
- 239000002994 raw material Substances 0.000 abstract description 5
- 239000002910 solid waste Substances 0.000 abstract description 4
- 239000011358 absorbing material Substances 0.000 abstract description 2
- 238000010521 absorption reaction Methods 0.000 abstract description 2
- 238000010792 warming Methods 0.000 abstract 3
- 238000010306 acid treatment Methods 0.000 abstract 1
- 238000004321 preservation Methods 0.000 abstract 1
- 230000005855 radiation Effects 0.000 abstract 1
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 18
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 14
- 238000003756 stirring Methods 0.000 description 11
- 238000001035 drying Methods 0.000 description 7
- 238000004131 Bayer process Methods 0.000 description 6
- 238000001914 filtration Methods 0.000 description 6
- 238000004537 pulping Methods 0.000 description 6
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 6
- NWZSZGALRFJKBT-KNIFDHDWSA-N (2s)-2,6-diaminohexanoic acid;(2s)-2-hydroxybutanedioic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O.NCCCC[C@H](N)C(O)=O NWZSZGALRFJKBT-KNIFDHDWSA-N 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 239000002585 base Substances 0.000 description 4
- IKDUDTNKRLTJSI-UHFFFAOYSA-N hydrazine monohydrate Substances O.NN IKDUDTNKRLTJSI-UHFFFAOYSA-N 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- -1 iron ions Chemical class 0.000 description 4
- 238000009740 moulding (composite fabrication) Methods 0.000 description 4
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 235000010265 sodium sulphite Nutrition 0.000 description 3
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 230000005670 electromagnetic radiation Effects 0.000 description 2
- 229960004887 ferric hydroxide Drugs 0.000 description 2
- 229910001447 ferric ion Inorganic materials 0.000 description 2
- IEECXTSVVFWGSE-UHFFFAOYSA-M iron(3+);oxygen(2-);hydroxide Chemical compound [OH-].[O-2].[Fe+3] IEECXTSVVFWGSE-UHFFFAOYSA-M 0.000 description 2
- 229910021506 iron(II) hydroxide Inorganic materials 0.000 description 2
- NCNCGGDMXMBVIA-UHFFFAOYSA-L iron(ii) hydroxide Chemical compound [OH-].[OH-].[Fe+2] NCNCGGDMXMBVIA-UHFFFAOYSA-L 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229910017604 nitric acid Inorganic materials 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 241000282414 Homo sapiens Species 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003623 enhancer Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 238000001028 reflection method Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000000192 social effect Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Treatment Of Sludge (AREA)
Abstract
The invention provides a kind of method for preparing radiation-proof plate, wherein, methods described includes containing the aqueous dispersion of red mud with acid treatment, add reducing agent and adjust the pH value of the aqueous dispersion to 89 with alkali, and gained aqueous dispersion is mixed to prepare warming plate with preparing the material of warming plate.The present invention is by using red mud as raw material, carry out corresponding acid, basification, and mixed with the material for preparing warming plate, the heat preservation plate material of the magnetic iron oxide absorbing material with magnetic property can be prepared, realize the absorption to electromagnetic wave, the purpose of indoor anti-electromagnetic radiation is reached, is turned waste into wealth, the high value added utilization of solid waste is realized.
Description
Technical Field
The invention relates to a method for preparing a radiation-proof plate.
Background
The red mud is used as a solid waste in the industrial production of alumina, and the discharge of a large amount of red mud has direct or indirect influence on the production and life of human beings. At present, the red mud produced by alumina plants at home and abroad is mostly conveyed to a yard and stockpiled by a wet method after damming or stockpiled by a dry method after drying, dehydration and evaporation. Therefore, the method not only can cause soil alkalization and swampiness, pollute the surface and underground water source, occupy a large amount of land, but also cause secondary waste of resources.
With the continuous development of urban economy and science and technology, electronics, communication, computers, automobiles, electrical equipment and the like enter families, man-made electromagnetic energy in urban spaces is increased year by year, and electromagnetic radiation gradually becomes the fourth pollution source of China after atmospheric pollution, water pollution and noise pollution.
Disclosure of Invention
The invention provides a method for preparing a radiation-proof plate. According to the method, the solid waste red mud is used as a raw material, so that the waste is recycled, the environmental pressure is relieved, waste can be changed into valuable, and the radiation-proof plate is prepared.
The inventors of the present invention consider that red mud contains a large amount of iron oxide from the viewpoint of turning waste into wealth. The magnetic iron oxide is an important semiconductor magnetic material, has excellent wave-absorbing performance and plays an important role in radiation-proof materials. Therefore, if a large amount of iron oxide in the red mud can be converted into magnetic iron oxide, the magnetic iron oxide can be used as a raw material for preparing the radiation-emitting panel, waste is changed into valuable, and the magnetic radiation-emitting panel has important economic and social effects.
Accordingly, the present invention provides a method for preparing a radiation-proof panel, wherein the method comprises treating an aqueous dispersion containing red mud with an acid, adding a reducing agent and adjusting the pH of the aqueous dispersion to 8 to 9 with an alkali, and mixing the obtained aqueous dispersion with a material for preparing an insulation board to prepare the insulation board.
Preferably, the content of the iron oxide in the red mud is 30-60 wt%.
Preferably, the acid is used in an amount of 0.3 to 1mL/g relative to the iron oxide content of the aqueous dispersion.
Preferably, the reducing agent is used in an amount of 0.05 to 0.25g/g relative to the iron oxide content of the aqueous dispersion.
Preferably, the mass ratio of the red mud in the aqueous dispersion to the material for preparing the insulation board is 1: 3-6.
Preferably, the material for preparing the insulation board comprises one or more of mineral wool fibers, a gelling agent, a reinforcing agent, a binder and a flocculating agent.
Preferably, the gelling agent is used in an amount of 15-40 wt.%, the reinforcing agent in an amount of 3-5 wt.%, the binder in an amount of 20-30 wt.%, and the flocculating agent in an amount of 0.5-1 wt.%, relative to the weight of the mineral wool fibers.
According to the invention, the red mud is used as a raw material, is subjected to corresponding acid and alkalization treatment, and is mixed with the material for preparing the insulation board, so that the insulation board of the magnetic iron oxide wave-absorbing material with the magnetic property can be prepared, the absorption of electromagnetic waves is realized, the purpose of preventing electromagnetic radiation indoors is achieved, the waste is changed into valuable, and the high value-added utilization of solid waste is realized.
Detailed Description
The following describes in detail specific embodiments of the present invention. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
The invention provides a method for preparing a radiation-proof plate, which comprises the steps of treating an aqueous dispersion containing red mud with acid, adding a reducing agent, adjusting the pH value of the aqueous dispersion to 8-9 with alkali, and mixing the aqueous dispersion with a material for preparing a heat-insulating plate to prepare the heat-insulating plate.
In the present invention, the aqueous dispersion containing red mud may be an aqueous dispersion containing red mud formed by mixing 30 to 50g of red mud with 1000g of water.
In the present invention, the acid may be any acid known in the art, such as hydrochloric acid (preferably concentrated hydrochloric acid with a mass fraction of 37%), sulfuric acid (preferably dilute sulfuric acid), nitric acid (preferably dilute nitric acid), and the like, as long as the iron oxide in the red mud can be converted into iron ions. The invention is not particularly claimed.
In the present invention, the reducing agent may be a reducing agent commonly used in the art as long as the reducing agent is capable of reducing ferric ions. Preferably sodium sulfite and/or hydrazine hydrate, etc.
In the present invention, the alkali may be any alkali known in the art, such as sodium hydroxide, potassium hydroxide, calcium hydroxide, etc., as long as it can convert iron ions in the red mud into ferric hydroxide or ferrous hydroxide. The invention is not particularly claimed.
In the invention, the red mud can be polluting waste residues discharged when the aluminum oxide is extracted in the aluminum industry in the field. The red mud used in the invention is preferably Bayer process red mud. In addition, when the red mud is used as a raw material, the red mud does not need to be pretreated and can be directly used.
In the present invention, in order to obtain a radiation-proof plate with a better radiation-proof function, the content of the iron oxide in the red mud is preferably 10 to 60 wt%, and more preferably 30 to 60 wt%.
In the present invention, the amount of the acid is not particularly limited as long as the acid is used in an amount capable of converting iron oxide into iron ions. Preferably, the amount of the acid used is 0.3 to 1mL/g relative to the iron oxide content of the red mud in the aqueous dispersion. In the present invention, the amount of the acid is the amount of the effective ingredient.
In the present invention, the amount of the reducing agent is not particularly limited as long as the reducing agent is capable of reducing ferric ions. Preferably, the reducing agent is used in an amount of 0.05 to 0.25g/g, preferably 0.05 to 0.2g/g, relative to the iron oxide content of the red mud in the aqueous dispersion. In the present invention, the amount of the reducing agent is the amount of the effective component.
In the present invention, it is preferable that a certain amount of water is added to dilute the aqueous dispersion before the reducing agent is added, and the amount of water added may be selected according to the actual circumstances as long as it is advantageous to stir the aqueous dispersion.
In the present invention, the amount of the base used is not particularly limited as long as the base can convert iron ions into ferric hydroxide or ferrous hydroxide. Preferably, the base is used in an amount such that the base adjusts the pH of the aqueous dispersion to a value of 8 to 9.
In the present invention, the material for preparing the insulation board may include materials known to those skilled in the art. Preferably, the material for preparing the insulation board comprises one or more of mineral wool fibers, a gelling agent, a reinforcing agent, a binder and a flocculating agent.
In the present invention, the gelling agent may be a material known to those skilled in the art to provide a gelling effect, and may be, for example, hydrated lime, gypsum, water glass, etc., preferably hydrated lime. The gelling agent may be used in amounts known in the art. Preferably, the gelling agent is used in an amount of 15-40 wt.%, relative to the weight of the mineral wool fibers.
In the present invention, the reinforcing agent may be a material known to those skilled in the art to provide a reinforcing effect, and may be, for example, wollastonite fibers, gypsum whiskers, sepiolite fibers, fibrous brucite, or the like, and preferably wollastonite fibers and/or sepiolite fibers. The enhancer may be used in amounts known in the art. Preferably, the reinforcing agent is used in an amount of 3 to 5% by weight relative to the weight of the mineral wool fibers.
In the present invention, the binder may be a material known to those skilled in the art to provide a binding effect, and may be, for example, clay and/or starch, etc. The binder may be used in amounts known in the art. Preferably, the binder is used in an amount of 20-30 wt.%, relative to the weight of the mineral wool fibers.
In the present invention, the flocculant may be a material known to those skilled in the art to provide a flocculation effect, and may be, for example, aluminum sulfate, polyacrylamide, polyaluminum chloride, polyaluminum sulfate, polyferric chloride, polyferric sulfate, and the like, preferably aluminum sulfate and/or polyacrylamide. The amount of flocculant may be an amount known in the art. Preferably, the flocculating agent is used in an amount of 0.5 to 1% by weight, relative to the weight of the mineral wool fibres.
In the present invention, the method for preparing the insulation board may be any method known to those skilled in the art. For example, the method can comprise the steps of mixing and pulping materials for preparing the insulation board, filtering, forming and drying.
The present invention is further illustrated by the following examples, in which reagents and starting materials used in the present invention are commercially available unless otherwise specified.
Example 1
Dispersing 30 g of Bayer process red mud (the content of ferric oxide is 32 weight percent) in 1.0L of water, adding 15mL of concentrated hydrochloric acid (the mass fraction is 37 percent), and treating for 30 minutes; then adding 2.0L of water, adding 2g of reducing agent sodium sulfite, adjusting the pH value to about 9 by using 2mol/L sodium hydroxide solution, then adding 100 g of mineral wool fiber, 30 g of slaked lime, 5g of brucite fiber, 20 g of clay and 10 g of starch, continuously stirring and pulping, finally adding 1.0 g of aluminum sulfate, stirring for 1 minute, filtering, forming, and drying at 180 ℃ for 1 hour to obtain the radiation-proof insulation board with the thickness of 10 mm.
Example 2
Dispersing 35 g of Bayer process red mud (the content of ferric oxide is 32 weight percent) in 1.0L of water, adding 18mL of concentrated hydrochloric acid (the mass fraction is 37 percent), and treating for 30 minutes; then adding 2.0L of water, adding 2g of reducing agent sodium sulfite, adjusting the pH value to about 9 by using 2mol/L sodium hydroxide solution, then adding 100 g of mineral wool fiber, 30 g of slaked lime, 5g of gypsum whisker, 20 g of clay and 10 g of starch, continuously stirring and pulping, finally adding 0.5 g of polyacrylamide, stirring for 1 minute, filtering, forming, and drying at 180 ℃ for 1 hour to obtain the radiation-proof heat-insulating board with the thickness of 10 mm.
Example 3
40 g of Bayer process red mud (the content of ferric oxide is 40 weight percent) is dispersed in 1.0L of water, 20mL of concentrated hydrochloric acid (the mass fraction is 37 percent) is added, and the mixture is treated for 30 minutes; then adding 2.0L of water, adding 1.2g of reducing agent hydrazine hydrate (the concentration is 80 weight percent), adjusting the pH value to about 9 by using 2mol/L sodium hydroxide solution, then adding 100 g of mineral wool fiber, 40 g of slaked lime, 5g of wollastonite fiber, 15g of clay and 10 g of starch, stirring and pulping, finally adding 1 g of aluminum sulfate, stirring for 1 minute, filtering, forming, and drying for 1 hour at 180 ℃ to obtain the radiation-proof insulation board with the thickness of 10 mm.
Example 4
Dispersing 45 g of Bayer process red mud (the content of iron oxide is 32 weight percent) in 1.0L of water, adding 23mL of concentrated hydrochloric acid (the mass fraction is 37 percent), and treating for 30 minutes; then adding 2.0L of water, adding 1.2g of reducing agent hydrazine hydrate (the concentration is 80 weight percent), adjusting the pH value to about 9 by using 2mol/L sodium hydroxide solution, then adding 100 g of mineral wool fiber, 30 g of slaked lime, 5g of sepiolite fiber, 20 g of clay and 10 g of starch, continuously stirring and pulping, finally adding 1.0 g of aluminum sulfate, stirring for 1 minute, filtering, molding, and drying for 1 hour at 180 ℃ to obtain the radiation-proof insulation board with the thickness of 10 mm.
Example 5
50g of Bayer process red mud (the content of ferric oxide is 32 weight percent) is dispersed in 1.0L of water, 25mL of concentrated hydrochloric acid (the mass fraction is 37 percent) is added, and the mixture is treated for 30 minutes; then adding 2.0L of water, adding 1.3g of reducing agent hydrazine hydrate (the concentration is 80 weight percent), adjusting the pH value to about 9 by using 2mol/L sodium hydroxide solution, then adding 100 g of mineral wool fiber, 30 g of slaked lime, 5g of sepiolite fiber, 20 g of clay and 10 g of starch, continuously stirring and pulping, finally adding 1.0 g of aluminum sulfate, stirring for 1 minute, filtering, molding, and drying for 1 hour at 180 ℃ to obtain the radiation-proof insulation board with the thickness of 10 mm.
Example 6
The method of example 5 was used except that the reducing agent was used in an amount of 0.6 g.
Test example
Taking the radiation-proof insulation boards prepared in the embodiments 1-6, and determining the flexural strength according to the national standard GB/T25998-; the measurement of the thermal conductivity is carried out by referring to GB/T10295-2008 (thermal insulation material steady-state thermal resistance and related characteristic measurement heat flow meter method) and ASTM C518-04 (test method for measuring steady-state heat flux and heat transfer characteristic by using heat flow meter method), adopting a flat-plate heat flow meter method and using a DRPL-I thermal conductivity tester; the radiation-proof performance is tested by an HP-8720B network analyzer in a non-echo darkroom according to the requirements of national standard GJB 2038-94 and an arch reflection method. The test frequency band is 2-18GHz (high frequency), and the size of the sample is 180mm multiplied by 10 mm. The results are shown in Table 1.
TABLE 1
As shown in Table 1, the radiation-proof insulation board prepared by the method has high breaking strength, low thermal conductivity and excellent wave-absorbing performance within the range of 2-18GHz, particularly within the range of 5-15 GHz. Therefore, the method can be used for preparing the functional radiation-proof insulation board by adopting the waste red mud, and has better economical efficiency and practicability.
Claims (3)
1. A method for preparing radiation-proof plates is characterized by comprising the steps of treating an aqueous dispersion containing red mud with acid, adding a reducing agent, adjusting the pH value of the aqueous dispersion to 8-9 with alkali, and mixing the obtained aqueous dispersion with materials for preparing insulation plates to prepare the insulation plates;
wherein,
the content of ferric oxide in the red mud is 30-60 wt%;
the mass ratio of the red mud in the aqueous dispersion to the material for preparing the insulation board is 1: 3-6;
the material for preparing the heat-insulation board comprises mineral wool fibers, a gelling agent, a reinforcing agent, a binder and a flocculating agent, wherein the gelling agent is 15-40 wt%, the reinforcing agent is 3-5 wt%, the binder is 20-30 wt% and the flocculating agent is 0.5-1 wt% of the mineral wool fibers;
the gelling agent is hydrated lime, gypsum or water glass; the reinforcing agent is wollastonite fiber, gypsum whisker, sepiolite fiber or fiber brucite; the binder is clay and/or starch; the flocculating agent is aluminum sulfate, polyacrylamide, polyaluminium chloride, polyaluminium sulfate, polyferric chloride or polyferric sulfate.
2. The process according to claim 1, wherein the amount of acid used is 0.3-1mL/g relative to the content of iron oxide in the red mud in the aqueous dispersion.
3. The process according to claim 1, wherein the reducing agent is used in an amount of 0.05-0.25g/g relative to the content of iron oxide in the red mud in the aqueous dispersion.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56145145A (en) * | 1980-04-09 | 1981-11-11 | Sumitomo Cement Co | Manufacture of cement board |
| CN101139199A (en) * | 2007-08-20 | 2008-03-12 | 河北泰山纸面石膏板有限公司 | Gypsum plasterboard |
| CN102400498A (en) * | 2010-09-15 | 2012-04-04 | 北新集团建材股份有限公司 | A new type of reinforced mineral wool sound-absorbing panel and its preparation method |
| CN102674477A (en) * | 2012-05-24 | 2012-09-19 | 西安建筑科技大学 | Method for co-production of superfine ferroferric oxide and aluminum oxide by red mud of Bayer process |
-
2014
- 2014-08-29 CN CN201410438339.XA patent/CN105439520B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56145145A (en) * | 1980-04-09 | 1981-11-11 | Sumitomo Cement Co | Manufacture of cement board |
| CN101139199A (en) * | 2007-08-20 | 2008-03-12 | 河北泰山纸面石膏板有限公司 | Gypsum plasterboard |
| CN102400498A (en) * | 2010-09-15 | 2012-04-04 | 北新集团建材股份有限公司 | A new type of reinforced mineral wool sound-absorbing panel and its preparation method |
| CN102674477A (en) * | 2012-05-24 | 2012-09-19 | 西安建筑科技大学 | Method for co-production of superfine ferroferric oxide and aluminum oxide by red mud of Bayer process |
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