CN105366971B - 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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- CN105366971B CN105366971B CN201410438359.7A CN201410438359A CN105366971B CN 105366971 B CN105366971 B CN 105366971B CN 201410438359 A CN201410438359 A CN 201410438359A CN 105366971 B CN105366971 B CN 105366971B
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- red mud
- aqueous dispersion
- warming plate
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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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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 and activated carbon of warming plate.The present invention is by using red mud as raw material, carry out corresponding acid, basification, and mixed with the material and activated carbon 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 present invention relates to a kind of method for preparing radiation-proof plate.
Background technology
A kind of solid waste that red mud is produced as aluminum oxide industry, its substantial amounts of discharge is to human being's production, life
Cause direct or indirect influence.The processing method of red mud both at home and abroad produced by alumina producer is mostly conveying stockyard at present,
Wet method of building a dam store up or drying and dehydrating and evaporation after dry method store up.So, it is not only possible to cause alkalization of soils, bogginess, pollute
Cienega source, takes substantial amounts of soil, and cause the secondary waste of resource.
And now with urban economy, science and technology continue to develop, electronics, communication, computer, automobile and electrical equipment etc. enter
Enter family, the artificial electromagnetic energy in city space increases year by year, electromagnetic radiation progressively turns into after atmosphere pollution, water pollution and made an uproar
The pollution sources of China the 4th after sound pollution.
The content of the invention
The invention provides a kind of method for preparing radiation-proof plate.This method is original by using solid waste red mud
Material, not only realizes refuse reclamation, alleviates environmental pressure, and can turn waste into wealth, and prepares radiation-proof plate.
The present inventor is from the angle turned waste into wealth, it is contemplated that contain substantial amounts of iron oxide in red mud.And magnetic
Property iron oxide is a kind of important semiconductor magnetic material, with excellent absorbing property, plays and focuses in radiation proof material
The effect wanted.Therefore, just can be as preparing radiation protection sheet material if substantial amounts of iron oxide in red mud can be converted into magnetic iron oxide
Raw material, turn waste into wealth, with important economy and society effect.
Therefore, the invention provides a kind of method for preparing radiation-proof plate, wherein, methods described includes being contained with acid treatment
There is the aqueous dispersion of red mud, the pH value for adding reducing agent and adjusting the aqueous dispersion with alkali contains to 8-9, and by gained
Aqueous dispersion is mixed to prepare warming plate with preparing the material and activated carbon of warming plate.
Under preferable case, the content of iron oxide is 30-60 weight % in the red mud.
Under preferable case, relative to the content of the iron oxide in red mud in the aqueous dispersion, the sour consumption is
0.3-1mL/g。
Under preferable case, relative to the content of the iron oxide in red mud in the aqueous dispersion, the use of the reducing agent
Measure as 0.05-0.25g/g.
Under preferable case, the mass ratio of red mud and the material for preparing warming plate in the aqueous dispersion is 1：3-
6。
Under preferable case, the material for preparing warming plate includes mineral wool fiber, gelling agent, reinforcing agent, binding agent and wadding
Solidifying agent.
Under preferable case, relative to the weight of the mineral wool fiber, the consumption of the gelling agent is 15-40 weight %, institute
The consumption for stating reinforcing agent is that 3-5 weight %, the consumption of the binding agent are 20-30 weight %, and the flocculant consumption
For 0.5-1 weight %.
Under preferable case, relative to the weight of the red mud, the consumption of the activated carbon is 1-7 weight %.
Under preferable case, relative to the weight of the red mud, the consumption of the activated carbon is 1-3 weight %.
The present invention is by using red mud as raw material, carrying out acid, basification, and with preparing material and the work of warming plate accordingly
Property charcoal mixing, can prepare the heat preservation plate material of the magnetic iron oxide absorbing material with magnetic property, realize to electromagnetic wave
Absorption, reach the purpose of indoor anti-electromagnetic radiation, turn waste into wealth, realize the high value added utilization of solid waste.
Embodiment
The embodiment to the present invention is described in detail below.It should be appreciated that described herein specific
Embodiment is merely to illustrate and explain the present invention, and is not intended to limit the invention.
The invention provides a kind of method for preparing radiation-proof plate, wherein, methods described is red including being contained with acid treatment
The aqueous dispersion of mud, adds reducing agent and adjusts the pH value of the aqueous dispersion to 8-9 with alkali, and by gained moisture content
Granular media is mixed to prepare warming plate with preparing the material and activated carbon of warming plate.
In the present invention, the aqueous dispersion containing red mud can be to mix 30-50g red mud with 1000g water
To form the aqueous dispersion containing red mud.
In the present invention, the acid can be known in the art any one acid, and for example (preferred mass fraction is hydrochloric acid
37% concentrated hydrochloric acid), sulfuric acid (preferably dilute sulfuric acid), nitric acid (preferably dust technology) etc., as long as the iron oxide in red mud can be converted
For iron ion.The present invention is not specially required.
In the present invention, the reducing agent can be reducing agent commonly used in the art, as long as the reducing agent can reduce three
Valency iron ion.It is preferred that can be sodium sulfite and/or hydrazine hydrate, etc..
In the present invention, the alkali can be known in the art any one alkali, such as sodium hydroxide, potassium hydroxide, hydrogen
Calcium oxide etc., as long as the iron ion in red mud can be converted into iron hydroxide or ferrous hydroxide.The present invention is not special
It is required that.
In the present invention, the contaminative waste residue that the red mud is discharged when can extract aluminum oxide for this area aluminium industry.This
The red mud that invention is used is preferably Bayer process red mud.In addition, when the present invention uses red mud as raw material, being carried out without to red mud
Any pretreatment, can directly be used.
Under preferable case of the present invention, in order to obtain oxygen in the more preferable radiation-proof plate of radiation proof function, preferably described red mud
The content for changing iron is 10-60 weight %, more preferably 30-60 weight %.
In the present invention, the sour consumption is not specially required, as long as iron oxide can be changed into iron by the sour consumption
Ion.Under preferable case, relative to the content of the iron oxide in red mud in the aqueous dispersion, the sour consumption is
0.3-1mL/g.In the present invention, the sour consumption refers to the consumption of its active ingredient.
In the present invention, the consumption of the reducing agent is not specially required, if the reducing agent can reduce ferric iron from
Son.Under preferable case, relative to the content of the iron oxide in red mud in the aqueous dispersion, the consumption of the reducing agent
For 0.05-0.25g/g.In the present invention, the consumption of the reducing agent refers to the consumption of its active ingredient.
In the present invention, under preferable case, before addition reducing agent, it is aqueous scattered to dilute to add a certain amount of water
Body, the addition of water can be selected according to actual conditions, as long as being conducive to being stirred aqueous dispersion.
In the present invention, the consumption of the alkali is not specially required, as long as iron ion can be changed into iron hydroxide by the alkali
Or ferrous hydroxide.Under preferable case, the consumption of the alkali causes alkali to adjust the pH value of the aqueous dispersion to 8-9.
In the present invention, material well known by persons skilled in the art can be included by preparing the material of warming plate.Under preferable case,
The material for preparing warming plate includes mineral wool fiber, gelling agent, reinforcing agent, binding agent and flocculant.
In the present invention, the gelling agent can be it is well known by persons skilled in the art the material of gelatinization results can be provided,
Such as can be white lime, gypsum, waterglass, preferably white lime.The consumption of the gelling agent can be known in the art
Consumption.Under preferable case, relative to the weight of the mineral wool fiber, the consumption of the gelling agent is 15-40 weight %.
In the present invention, the reinforcing agent can be it is well known by persons skilled in the art the material of enhancing effect can be provided,
Such as can be wollastonite fibre, crystal whisker of gypsum, sepiolite fibre, nemalite, preferably wollastonite fibre and/or sea
Afrodite fiber.The consumption of the reinforcing agent can be known in the art consumption.Under preferable case, relative to the mineral wool fiber
Weight, the consumption of the reinforcing agent is 3-5 weight %.
In the present invention, the binding agent can be it is well known by persons skilled in the art the material of bond effect can be provided,
For example can be clay and/or starch, etc..The consumption of the binding agent can be known in the art consumption.Under preferable case,
Relative to the weight of the mineral wool fiber, the consumption of the binding agent is 20-30 weight %.
In the present invention, the flocculant can be it is well known by persons skilled in the art the material of flocculating effect can be provided,
Such as can be aluminum sulfate, polyacrylamide, aluminium polychloride, polyaluminium sulfate, poly-ferric chloride and bodied ferric sulfate,
Preferably aluminum sulfate and/or polyacrylamide.The consumption of the flocculant can be known in the art consumption.Preferable case
Under, relative to the weight of the mineral wool fiber, the consumption of the flocculant is 0.5-1 weight %.
In the present invention, the consumption of the activated carbon can be selected in relative broad range.It is red relative to described under preferable case
The weight of mud, the consumption of the activated carbon is 1-7 weight %, preferably 1-3 weight %.When the consumption of the activated carbon is above-mentioned
In the range of when selecting, the red mud and activated carbon can be made to play more preferable synergy, the radiation proof warming plate finally obtained
Shielding property can further improve.
In the present invention, the order of addition of the activated carbon present invention is not specially required, can with to prepare the material of warming plate same
Shi Tianjia, can also be added during addition prepares the material of warming plate, and the present invention is not specially required.Preferable case
Under, the activated carbon is added simultaneously with mineral wool fiber.
In the present invention, the method for preparing warming plate can be any one method well known by persons skilled in the art.For example,
Methods described, which can include mixing the material for preparing warming plate, to be beaten, filters, being molded, drying.
The present invention is further illustrated with reference to embodiment, reagent, raw material unless stated otherwise used in the present invention is equal
For commercial goods.
Embodiment 1
Take 30 grams of Bayer process red muds (iron oxide content is 36 weight %) to disperse in 1.0L water, add 15mL concentrated hydrochloric acids
(mass fraction is 37%), is handled 30 minutes；Then add water 2.0L, adds 0.8g reducing agent hydrazine hydrate hydrazine hydrate (concentration
80 weight %), and pH value is adjusted to 9 or so with 2mol/L sodium hydroxide solution, it is subsequently added into 100 grams of mineral wool fibers, 2g and lives
Property charcoal, 40 grams of white limes, 5 grams of wollastonite fibres, 15 grams of clays, 10 grams of starch, stirring to pulp are eventually adding 1 gram of aluminum sulfate, stirred
Mix and filtered after 1 minute, shaping, 180 DEG C of drying obtain radiation proof warming plate of the thickness for 10mm after 1 hour.
Embodiment 2
Take 35 grams of Bayer process red muds (iron oxide content is 32 weight %) to disperse in 1.0L water, add 18mL concentrated hydrochloric acids
(mass fraction is 37%), is handled 30 minutes；Then add water 2.0L, adds 2.0g reducing agent sodium sulfites, and with 2mol/L's
Sodium hydroxide solution adjusts pH value to 8 or so, is subsequently added into 100 grams of mineral wool fibers, 1.5g activated carbons, 30 grams of white limes, 5 grams of stones
Cream whisker, 20 grams of clays, 10 grams of starch, continue stirring to pulp, are eventually adding 0.5 gram of polyacrylamide, mistake after stirring 1 minute
Filter, shaping, 180 DEG C of drying obtain radiation proof warming plate of the thickness for 10mm after 1 hour.
Embodiment 3
Take 40 grams of Bayer process red muds (iron oxide content is 38 weight %) to disperse in 1.0L water, add 20mL concentrated hydrochloric acids
(mass fraction is 37%), is handled 30 minutes；Then add water 2.0L, adds 2.5g reducing agent sodium sulfites, and with 2mol/L's
Sodium hydroxide solution adjusts pH value to 9 or so, is subsequently added into 100 grams of mineral wool fibers, 1g activated carbons, 30 grams of white limes, 5 grams of water magnesium
Mineral wool, 20 grams of clays, 10 grams of starch, continue stirring to pulp, are eventually adding 1.0 grams of aluminum sulfate, and stirring is filtered after 1 minute, into
Type, 180 DEG C of dryings obtain the radiation proof warming plate that thickness is 10mm after 1 hour.
Embodiment 4
Take 45 grams of Bayer process red muds (iron oxide content is 32 weight %) to disperse in 1.0L water, add 23mL concentrated hydrochloric acids
(mass fraction is 37%), is handled 30 minutes；Then add water 2.0L, adds 1.5g reducing agent hydrazine hydrate hydrazine hydrate (concentration
80 weight %), and pH value is adjusted to 9 or so with 2mol/L sodium hydroxide solution, it is subsequently added into 100 grams of mineral wool fibers, 2g and lives
Property charcoal, 30 grams of white limes, 4 grams of sepiolite fibres, 10 grams of clays, 10 grams of starch, continue stirring to pulp, be eventually adding aluminum sulfate
1.0 grams, stirring is filtered after 1 minute, shaping, and 180 DEG C of drying obtain radiation proof warming plate of the thickness for 10mm after 1 hour.
Embodiment 5
Take 50 grams of Bayer process red muds (iron oxide content is 36 weight %) to disperse in 1.0L water, add 25mL concentrated hydrochloric acids
(mass fraction is 37%), is handled 30 minutes；Then add water 2.0L, adds 1.5g reducing agent hydrazine hydrate hydrazine hydrate (concentration
80 weight %), and pH value is adjusted to 9 or so with 2mol/L sodium hydroxide solution, it is subsequently added into 100 grams of mineral wool fibers, 1g and lives
Property charcoal, 30 grams of white limes, 5 grams of sepiolite fibres, 20 grams of clays, 10 grams of starch, continue stirring to pulp, be eventually adding aluminum sulfate
1.0 grams, stirring is filtered after 1 minute, shaping, and 180 DEG C of drying obtain radiation proof warming plate of the thickness for 10mm after 1 hour.
Embodiment 6
Using the method for embodiment 3, unlike, add 2g activated carbons.
Test case
The radiation proof warming plate for taking above-described embodiment 1-6 to prepare, according to national standard GB/T 25998-2010, (mineral wool is decorated
Acoustic board) determine rupture strength；The measure normative reference GB/T10295-2008 of thermal conductivity factor (Technology of Steady State Thermal Resistance of Thermal Insulating Material and has
Close the measure heat-flow meter method of characteristic) and the ASTM C518-04 (examinations of use heat-flow meter method measure steady-state heat flux and heat transfer characteristic
Proved recipe method), using flat board heat-flow meter method, use DRPL-I heat conduction coefficient testers；Shielding property utilizes HP~8720B networks point
Analyzer is required in without echo darkroom according to national standard GJB2038~94, carries out testing its absorbing property using arched reflective method.Survey
Examination frequency range is 2~18GHz (high frequency), and sample size is 180mm × 180mm × 10mm.It the results are shown in Table 1.
Table 1
As can be seen from Table 1, the radiation proof warming plate prepared using the method for the present invention, with very high rupture strength,
Relatively low thermal conductivity factor, and in the range of 2-18GHz, there is excellent absorbing property in the range of especially 5-15GHz.So as to say
Bright method of the invention can actually prepare functional form radiation proof warming plate using waste red mud, with preferable economy and
Practicality.
Claims (4)
1. a kind of method for preparing radiation-proof plate, it is characterised in that methods described includes containing the aqueous of red mud with acid treatment
Dispersion, adds reducing agent and adjusts the pH value of the aqueous dispersion to 8-9 with alkali, and by gained aqueous dispersion and system
The material and activated carbon of standby warming plate mix to prepare warming plate；
Wherein, the content of iron oxide is 30-60 weight % in the red mud；
The mass ratio of red mud and the material for preparing warming plate in the aqueous dispersion is 1：3-6；
Relative to the weight of the red mud, the consumption of the activated carbon is 1-7 weight %；
The material for preparing warming plate includes mineral wool fiber, gelling agent, reinforcing agent, binding agent and flocculant, relative to described
The weight of mineral wool fiber, the consumption of the gelling agent be 15-40 weight %, the consumption of the reinforcing agent be 3-5 weight %, it is described
The consumption of binding agent is 20-30 weight %, and the consumption of the flocculant is 0.5-1 weight %；
The gelling agent is white lime, gypsum or waterglass；The reinforcing agent is wollastonite fibre, crystal whisker of gypsum, sepiolite fibre
Dimension or nemalite；The binding agent is clay and/or starch；The flocculant is aluminum sulfate, polyacrylamide, polymerization chlorine
Change aluminium, polyaluminium sulfate, poly-ferric chloride or bodied ferric sulfate.
2. according to the method described in claim 1, wherein, relative to containing for the iron oxide in red mud in the aqueous dispersion
Amount, the sour consumption is 0.3-1mL/g.
3. according to the method described in claim 1, wherein, relative to containing for the iron oxide in red mud in the aqueous dispersion
Amount, the consumption of the reducing agent is 0.05-0.25g/g.
4. according to the method described in claim 1, wherein, relative to the weight of the red mud, the consumption of the activated carbon is 1-3
Weight %.
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| CN201410438359.7A CN105366971B (en) | 2014-08-29 | 2014-08-29 | A kind of method for preparing radiation-proof plate |
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| CN201410438359.7A CN105366971B (en) | 2014-08-29 | 2014-08-29 | A kind of method for preparing radiation-proof plate |
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| CN105366971A CN105366971A (en) | 2016-03-02 |
| CN105366971B true CN105366971B (en) | 2017-09-29 |
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Citations (5)
| 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 |
| CN101205126A (en) * | 2006-12-22 | 2008-06-25 | 洛阳中超非金属材料有限公司 | Red-mud coal ash baking-free brick |
| CN102400498A (en) * | 2010-09-15 | 2012-04-04 | 北新集团建材股份有限公司 | Novel enhanced mineral cotton acoustic board and preparation method thereof |
| 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 CN201410438359.7A patent/CN105366971B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56145145A (en) * | 1980-04-09 | 1981-11-11 | Sumitomo Cement Co | Manufacture of cement board |
| CN101205126A (en) * | 2006-12-22 | 2008-06-25 | 洛阳中超非金属材料有限公司 | Red-mud coal ash baking-free brick |
| 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 | Novel enhanced mineral cotton acoustic board and preparation method thereof |
| 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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| CN105366971A (en) | 2016-03-02 |
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