CN105439520A - Method for producing radiation resisting plates - Google Patents
Method for producing radiation resisting plates Download PDFInfo
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- CN105439520A CN105439520A CN201410438339.XA CN201410438339A CN105439520A CN 105439520 A CN105439520 A CN 105439520A CN 201410438339 A CN201410438339 A CN 201410438339A CN 105439520 A CN105439520 A CN 105439520A
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- aqueous dispersion
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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 method for producing radiation resisting plates. The method comprises the following steps: processing a red mud-containing aqueous dispersion by using an acid, adding a reducing agent, adjusting the pH value of the aqueous dispersion to 8-9 by using an alkali, and mixing the obtained aqueous dispersion with a material for making heat insulation plates to make the heat insulation plates. The heat insulation plates made of a magnetic iron oxide wave absorbing material and having magnetic properties are produced from red mud through corresponding acid and alkalization treatment, so electromagnetic waves are absorbed to realize indoor electromagnetic radiation resistance, and wastes are changed into valuables to realize high added value utilization of solid wastes.
Description
Technical field
The present invention relates to a kind of method preparing radiation-proof plate.
Background technology
A kind of solid waste that red mud is produced as aluminum oxide industry, its a large amount of discharge causes direct or indirect impact to human being's production, life.The treatment process of the red mud that current home and abroad alumina producer produces is mostly conveying stockyard, and wet method of building a dam is stored up or after drying and dehydrating and evaporation, dry method is stored up.Like this, not only may cause alkalization of soils, paludification, polluted surface underground water source, take a large amount of soils, and cause the secondary waste of resource.
And at present along with the development of urban economy, science and technology, electronics, communication, computer, automobile and electric installation etc. enter family, the artificial electromagnetic energy in city space increases year by year, and electromagnetic radiation has progressively become China the 4th source of pollution after topsoil, water pollutions and sound pollution.
Summary of the invention
The invention provides a kind of method preparing radiation-proof plate.The method, by adopting solid waste red mud to be raw material, not only achieves refuse reclamation, alleviates environmental stress, and can turn waste into wealth, prepare radiation-proof plate.
The present inventor, from the angle turned waste into wealth, considers in red mud containing a large amount of ferric oxide.And martial ethiops is a kind of important semiconductor magnetic material, there is excellent absorbing property, play an important role at antiradiation material.Therefore, just as the raw material preparing radiation protection sheet material, can turn waste into wealth, there is important economy and society effect if ferric oxide a large amount of in red mud can be converted into martial ethiops.
Therefore, the invention provides a kind of method preparing radiation-proof plate, wherein, described method comprises the aqueous dispersion containing red mud with acid treatment, add reductive agent and regulate the pH value of described aqueous dispersion to 8-9 with alkali, and by gained aqueous dispersion with prepare the material mixing of warming plate to prepare warming plate.
Under preferable case, in described red mud, the content of ferric oxide is 30-60 % by weight.
Under preferable case, relative to the content of ferric oxide in described aqueous dispersion, the consumption of described acid is 0.3-1mL/g.
Under preferable case, relative to the content of ferric oxide in described aqueous dispersion, the consumption of described reductive agent is 0.05-0.25g/g.
Under preferable case, the red mud in described aqueous dispersion and the described mass ratio preparing the material of warming plate are 1:3-6.
Under preferable case, the described material preparing warming plate comprise in mineral wool fibre, jelling agent, toughener, binding agent and flocculation agent one or more.
Under preferable case, relative to the weight of described mineral wool fibre, the consumption of described jelling agent is 15-40 % by weight, the consumption of described toughener is 3-5 % by weight, the consumption of described binding agent is 20-30 % by weight, and the consumption of described flocculation agent is 0.5-1 % by weight.
It is raw material that the present invention passes through with red mud, carry out corresponding acid, alkalinisation treatment, and with prepare the material mixing of warming plate, the heat preservation plate material of the martial ethiops absorbing material with magnetic property can be prepared, realize electromagnetic absorption, reach the object of indoor anti-electromagnetic radiation, turn waste into wealth, realize the high value added utilization of solid waste.
Embodiment
Below the specific embodiment of the present invention is described in detail.Should be understood that, embodiment described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
The invention provides a kind of method preparing radiation-proof plate, wherein, described method comprises the aqueous dispersion containing red mud with acid treatment, add reductive agent and regulate the pH value of described aqueous dispersion to 8-9 with alkali, and by gained aqueous dispersion with prepare the material mixing of warming plate to prepare warming plate.
In the present invention, the described aqueous dispersion containing red mud can be the red mud of 30-50g is mixed the aqueous dispersion to be formed containing red mud with the water of 1000g.
In the present invention, any one acid that described acid can be known in the art, such as hydrochloric acid (preferred mass mark is the concentrated hydrochloric acid of 37%), sulfuric acid (preferred dilute sulphuric acid), nitric acid (preferred dust technology) etc., as long as can be converted into iron ion by the ferric oxide in red mud.The present invention does not specially require.
In the present invention, described reductive agent can be the conventional reductive agent in this area, as long as described reductive agent can reduce ferric ion.Can be preferably S-WAT and/or hydrazine hydrate, etc.
In the present invention, any one alkali that described alkali can be known in the art, such as sodium hydroxide, potassium hydroxide, calcium hydroxide etc., as long as can be converted into ironic hydroxide or ferrous hydroxide by the iron ion in red mud.The present invention does not specially require.
In the present invention, described red mud can for the contaminative waste residue of discharging when this area Aluminium industry extracts aluminum oxide.The red mud that the present invention adopts is preferably Bayer process red mud.In addition, when the present invention adopts red mud as raw material, also without the need to carrying out any pre-treatment to red mud, can directly use.
Under preferable case of the present invention, in order to obtain the better radiation-proof plate of radiation proof function, in preferred described red mud, the content of ferric oxide is 10-60 % by weight, is more preferably 30-60 % by weight.
In the present invention, the consumption of described acid does not specially require, as long as ferric oxide can be changed into iron ion by the consumption of described acid.Under preferable case, relative to the content of the ferric oxide in red mud in described aqueous dispersion, the consumption of described acid is 0.3-1mL/g.In the present invention, the consumption of described acid refers to the consumption of its effective constituent.
In the present invention, the consumption of described reductive agent does not specially require, as long as described reductive agent can reduce ferric ion.Under preferable case, relative to the content of the ferric oxide in red mud in described aqueous dispersion, the consumption of described reductive agent is 0.05-0.25g/g, is preferably 0.05-0.2g/g.In the present invention, the consumption of described reductive agent refers to the consumption of its effective constituent.
In the present invention, under preferable case, before interpolation reductive agent, can add a certain amount of water to dilute aqueous dispersion, the addition of water can be selected according to practical situation, as long as be conducive to stirring aqueous dispersion.
In the present invention, the consumption of described alkali does not specially require, as long as iron ion can be changed into ironic hydroxide or ferrous hydroxide by described alkali.Under preferable case, the consumption of described alkali makes alkali regulate the pH value of described aqueous dispersion to 8-9.
In the present invention, the material preparing warming plate can comprise material well known by persons skilled in the art.Under preferable case, the described material preparing warming plate comprise in mineral wool fibre, jelling agent, toughener, binding agent and flocculation agent one or more.
In the present invention, described jelling agent can be the material that can provide gelatinization results well known by persons skilled in the art, such as, can be white lime, gypsum, water glass etc., is preferably white lime.The consumption that the consumption of described jelling agent can be known in the art.Under preferable case, relative to the weight of described mineral wool fibre, the consumption of described jelling agent is 15-40 % by weight.
In the present invention, described toughener can be the material that can provide reinforced effects well known by persons skilled in the art, such as, can be wollastonite fibre, crystal whisker of gypsum, sepiolite fibre, nemalite etc., is preferably wollastonite fibre and/or sepiolite fibre.The consumption that the consumption of described toughener can be known in the art.Under preferable case, relative to the weight of described mineral wool fibre, the consumption of described toughener is 3-5 % by weight.
In the present invention, described binding agent can be the material that can provide bond effect well known by persons skilled in the art, such as, can be clay and/or starch, etc.The consumption that the consumption of described binding agent can be known in the art.Under preferable case, relative to the weight of described mineral wool fibre, the consumption of described binding agent is 20-30 % by weight.
In the present invention, described flocculation agent can be the material that can provide flocculating effect well known by persons skilled in the art, can be such as Tai-Ace S 150, polyacrylamide, polymerize aluminum chloride, polyaluminium sulfate, poly-ferric chloride and bodied ferric sulfate etc., be preferably Tai-Ace S 150 and/or polyacrylamide.The consumption that the consumption of described flocculation agent can be known in the art.Under preferable case, relative to the weight of described mineral wool fibre, the consumption of described flocculation agent is 0.5-1 % by weight.
In the present invention, the method preparing warming plate can be any one method well known by persons skilled in the art.Such as, described method can comprise by prepare warming plate material mixing making beating, filter, shaping, dry.
Further illustrate the present invention below in conjunction with embodiment, the reagent unless stated otherwise used by the present invention, raw material are commercial goods.
Embodiment 1
Get 30 grams of Bayer process red muds (iron oxide content is 32 % by weight) to disperse in 1.0L water, add 15mL concentrated hydrochloric acid (massfraction is 37%), process 30 minutes; Then add water 2.0L, add 2g reductive agent S-WAT, and about sodium hydroxide solution adjust ph to 9 with 2mol/L, then 100 grams of mineral wool fibres, 30 grams of white limes, 5 grams of brucite fibers, 20 grams of clays, 10 grams of starch are added, continue stirring to pulp, finally add 1.0 grams, Tai-Ace S 150, stir after 1 minute and filter, shaping, 180 DEG C of dryings obtain the radioprotective warming plate that thickness is 10mm after 1 hour.
Embodiment 2
Get 35 grams of Bayer process red muds (iron oxide content is 32 % by weight) to disperse in 1.0L water, add 18mL concentrated hydrochloric acid (massfraction is 37%), process 30 minutes; Then add water 2.0L, add 2g reductive agent S-WAT, and about sodium hydroxide solution adjust ph to 9 with 2mol/L, then 100 grams of mineral wool fibres, 30 grams of white limes, 5 grams of crystal whisker of gypsum, 20 grams of clays, 10 grams of starch are added, continue stirring to pulp, finally add polyacrylamide 0.5 gram, stir after 1 minute and filter, shaping, 180 DEG C of dryings obtain the radioprotective warming plate that thickness is 10mm after 1 hour.
Embodiment 3
Get 40 grams of Bayer process red muds (iron oxide content is 40 % by weight) to disperse in 1.0L water, add 20mL concentrated hydrochloric acid (massfraction is 37%), process 30 minutes; Then add water 2.0L, add 1.2g reductive agent hydrazine hydrate (concentration 80 % by weight), and about sodium hydroxide solution adjust ph to 9 with 2mol/L, then 100 grams of mineral wool fibres, 40 grams of white limes, 5 grams of wollastonite fibres, 15 grams of clays, 10 grams of starch are added, stirring to pulp, finally adds 1 gram, Tai-Ace S 150, stirs after 1 minute and filters, shaping, 180 DEG C of dryings obtain the radioprotective warming plate that thickness is 10mm after 1 hour.
Embodiment 4
Get 45 grams of Bayer process red muds (iron oxide content is 32 % by weight) to disperse in 1.0L water, add 23mL concentrated hydrochloric acid (massfraction is 37%), process 30 minutes; Then add water 2.0L, add 1.2g reductive agent hydrazine hydrate (concentration 80 % by weight), and about sodium hydroxide solution adjust ph to 9 with 2mol/L, then 100 grams of mineral wool fibres, 30 grams of white limes, 5 grams of sepiolite fibres, 20 grams of clays, 10 grams of starch are added, continue stirring to pulp, finally add 1.0 grams, Tai-Ace S 150, stir after 1 minute and filter, shaping, 180 DEG C of dryings obtain the radioprotective warming plate that thickness is 10mm after 1 hour.
Embodiment 5
Get 50 grams of Bayer process red muds (iron oxide content is 32 % by weight) to disperse in 1.0L water, add 25mL concentrated hydrochloric acid (massfraction is 37%), process 30 minutes; Then add water 2.0L, add 1.3g reductive agent hydrazine hydrate (concentration 80 % by weight), and about sodium hydroxide solution adjust ph to 9 with 2mol/L, then 100 grams of mineral wool fibres, 30 grams of white limes, 5 grams of sepiolite fibres, 20 grams of clays, 10 grams of starch are added, continue stirring to pulp, finally add 1.0 grams, Tai-Ace S 150, stir after 1 minute and filter, shaping, 180 DEG C of dryings obtain the radioprotective warming plate that thickness is 10mm after 1 hour.
Embodiment 6
Adopt the method for embodiment 5, unlike, the consumption of described reductive agent is 0.6g.
Test case
Get radioprotective warming plate prepared by above-described embodiment 1-6, measure folding strength according to GB GB/T25998-2010 (mineral wool decoration acoustic absorption); The mensuration reference standard GB/T10295-2008 (the mensuration heat flowmeter method of Technology of Steady State Thermal Resistance of Thermal Insulating Material and related characteristics) of thermal conductivity and ASTMC518-04 (measuring the test method of steady-state heat flux and heat transfer characteristic by heat flowmeter method), adopt dull and stereotyped heat flowmeter method, use DRPL-I heat conduction coefficient tester; Shielding property utilizes HP ~ 8720B network analyzer according to GB GJB2038 ~ 94 requirement in without echo darkroom, adopts arched reflective method to carry out testing its absorbing property.Test 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 shown in Table 1, adopt radioprotective warming plate prepared by method of the present invention, there is very high folding strength, lower thermal conductivity, and within the scope of 2-18GHz, especially there is within the scope of 5-15GHz excellent absorbing property.Thus illustrate that method of the present invention can adopt waste red mud to prepare functional type radioprotective warming plate really, there is good economy and practicality.
Claims (7)
1. prepare the method for radiation-proof plate for one kind, it is characterized in that, described method comprises the aqueous dispersion containing red mud with acid treatment, add reductive agent and regulate the pH value of described aqueous dispersion to 8-9 with alkali, and by gained aqueous dispersion with prepare the material mixing of warming plate to prepare warming plate.
2. method according to claim 1, wherein, in described red mud, the content of ferric oxide is 30-60 % by weight.
3. method according to claim 2, wherein, relative to the content of the ferric oxide in red mud in described aqueous dispersion, the consumption of described acid is 0.3-1mL/g.
4. method according to claim 1, wherein, relative to the content of the ferric oxide in red mud in described aqueous dispersion, the consumption of described reductive agent is 0.05-0.25g/g.
5. the red mud according to the method in claim 1-4 described in any one, wherein, in described aqueous dispersion and the described mass ratio preparing the material of warming plate are 1:3-6.
6. method according to claim 1, wherein, the described material preparing warming plate comprise in mineral wool fibre, jelling agent, toughener, binding agent and flocculation agent one or more.
7. method according to claim 6, wherein, relative to the weight of described mineral wool fibre, the consumption of described jelling agent is 15-40 % by weight, the consumption of described toughener is 3-5 % by weight, the consumption of described binding agent is 20-30 % by weight, and the consumption of described flocculation agent is 0.5-1 % by weight.
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| CN201410438339.XA CN105439520B (en) | 2014-08-29 | 2014-08-29 | A kind of method for preparing radiation-proof plate |
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| CN201410438339.XA CN105439520B (en) | 2014-08-29 | 2014-08-29 | A kind of method for preparing radiation-proof plate |
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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 | 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 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 | 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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