CN108178595A - Bayer process red mud desulfurated plaster steamed building blocks brick and preparation method thereof - Google Patents
Bayer process red mud desulfurated plaster steamed building blocks brick and preparation method thereof Download PDFInfo
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- CN108178595A CN108178595A CN201711253805.7A CN201711253805A CN108178595A CN 108178595 A CN108178595 A CN 108178595A CN 201711253805 A CN201711253805 A CN 201711253805A CN 108178595 A CN108178595 A CN 108178595A
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- CN
- China
- Prior art keywords
- red mud
- gypsum
- bayer process
- kettle
- building blocks
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
- C04B28/142—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements containing synthetic or waste calcium sulfate cements
- C04B28/144—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements containing synthetic or waste calcium sulfate cements the synthetic calcium sulfate being a flue gas desulfurization product
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- 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
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The present invention is with Bayer process red mud volume more than 45% and more than 35% desulfurated plaster, it is subject to flyash, lime, auxiliary additive and water and makees raw material, coordinate by a certain percentage, high temperature kneading, still aging, rolling, compression moulding, finished product this red mud gypsum mixing building block brick is made by rational proportion through autoclave curing again in agitated mixing, have many advantages, such as it is energy saving, sharp give up, density is small, intensity is high, moisture-proof, high temperature resistant, chemical resistance, durability.
Description
Technical field:
The present invention relates to a kind of building material blocks brick and preparation method thereof, in particular with pollution waste red mud and industry
Building material blocks brick that by-product gypsum is formed and preparation method thereof.
Background technology:
Red mud is the pollution waste residue discharged in aluminum oxide production process, average often to produce 1t aluminium oxide, it can generate 1.0~
2.0t red mud.With the fast development of China's aluminum oxide industry, ended for the end of the year 2015, the aluminium oxide production capacity in China alreadys exceed
60000000 t/, China, which alreadys exceed Australia, becomes the alumina producing base of maximum in the world.Red mud is as aluminium oxide
The waste of industrial production discharge, with the rapid growth of aluminium oxide yield, environment and social concern caused by red mud are
Increasingly show.
Desulfurated plaster is also known as desulfurized gesso of flue gas or FGD gypsum, is that the flue gas generated after burning to sulfurous fuels takes off
Industry by-product gypsum obtained from sulphur purified treatment.2013, about 1.84 hundred million t of China's industry by-product gypsum, comprehensive utilization ratio was only
Reach 48.1%, these gypsum do not only take up a large amount of soils if do not disposed, it is also possible to bring secondary pollution to environment, locate
It puts and makes good use of, to environment especially ecological environmental protection important in inhibiting.Building material brick is made using solid waste to replace
Clay-brickmaking has become inevitable research direction.
Using gypsum and the mutual excitation of Bayer process red mud intensity, a kind of Bayer process red mud, desulfurated plaster, powder are developed
Coal ash and lime binder, and research is optimized to its match ratio, available for making the material of building material brick.So this patent
Propose the preparation method of a kind of Bayer process red mud and desulfurated plaster mixing building block brick.
Invention content:
The purpose of the present invention is to provide building block brick and making that mixing is made using Bayer process red mud and desulfurated plaster
Method achievees the effect that energy saving, sharp useless, environmental protection and performance are high.
In the solution of the present invention, red mud gypsum steamed building blocks brick is with the dry red mud of Bayer process, desulfurated plaster, flyash, stone
Ash and auxiliary additive make raw material, coordinate by a certain percentage, and agitated mixing, standing, rolling, is pressed into the kneading of high temperature chuck
Type is made in high pressure Fu through high pressure, steam curing, and the auxiliary additive is by the agent of self-control acid-base neutralization, alum, adhesive
And reinforcing agent etc. is configured, wherein self-control acid-base neutralization agent contains acid neutralizing agent and alkali nertralizer, acid neutralizing agent main component
There are aluminium hydroxide, Organic Alcohol etc.；Alkali nertralizer has acetic acid, amion acetic acid etc..
Further, the raw material of the building block brick includes siccative and water, proportioning：Bayer process red mud 45~65%, desulfurization stone
Cream >=35%, flyash 5~15%, lime 2~10%, auxiliary additive 0.5~2.0%, amount of water are whole siccative amounts
12~25%.
Further, the Bayer process red mud and desulfurated plaster are using dry red mud and dry desulfurization gypsum powder, moisture
It is decreased to less than 5%.
Further, the dry red mud of the Bayer process, desulfurated plaster grinding rate should make 90um sieve pores screen over-size below 10%；
Na in the Bayer process red mud2O content should be less than 1.5%.
Further, the dry bulk density of the flyash is more than 600kg/m3, and it contains if it is aluminous fly-ash
Al2O3>=40%, fineness should make 88um sieve pores screen over-size below 15%.
The method that the present invention makes red mud gypsum steamed building blocks brick, raw material proportioning are:Bayer process red mud 45~65%, desulfurization
Gypsum >=35%, flyash 5~15%, lime 2~10%, auxiliary additive 0.5~2.0%, amount of water are whole siccative amounts
12-25%；
The processing step of the method is:
It is stirred after Bayer process red mud, gypsum, lime, flyash, auxiliary additive and water are prepared according to matching method equal
It is even；
The material prepared is transported to high temperature and mediates in kettle, and capping heat preservation is lower to stop the regular hour；
Material after kneading is aged by bonding kettle held for some time, then taking out outside kettle after natural cooling.
Material after ageing carries out rolling, then by the good material of rolling through brick machine compression moulding；
Molding brick is placed into steam press maintenance in steam pressure Fu.
Further, mixed material is in high temperature chuck mediates kettle, and under capping heat preservation, temperature is controlled 80~120
DEG C, 2~4h of residence time.
Further, the high temperature chuck is mediated kettle as heat conduction oil lagging or is heated with high steam, described red
The molding of mudstone cream building block brick is using hydraulic press compression moulding.
Further, the mixed material after kneading needs mediating kettle inside holding 1~3h of standing, holding temperature 50~90
DEG C, it is aged 2~4h after taking out the outer natural cooling of kettle.
Further, heat up 2~4h during steam press maintenance in Fu, 1~2h of constant temperature, relevant pressure at 140~180 DEG C
1.0±0.2Mpa。
Specific embodiment:
The specific embodiment of the present invention is described in detail below, which is merely to illustrate the present invention and does not have to
In limiting the scope of the invention, those skilled in the art fall within appended by the application the modification of the various equivalent forms of the present invention
Claim limited range.
1st, it stocks up
A Bayer process red muds and desulfurated plaster
Red mud powder is done using Bayer process, according to wet Bayer process red mud, according to moisture content height, selects different dehydrations dry
It is dry to be handled, and 5% is less than to its moisture content and fineness 90um sieve pores screen over-size is asked to store below 10% and prepare dispensing.
The waste residue desulfurated plaster generated using power plant desulfurization, moisture content are less than 5%, it is desirable that fineness 90um sieve pore screen over-sizes
Less than 10%, it stores and prepares dispensing.
B flyash and lime
Flyash uses aluminous fly-ash, it is desirable that alumina content reaches more than 40%, it is desirable that 88um sieve pore screen over-sizes
Less than 15%, place waiting dispensing；Using lime, fineness requirement is 88um sieve pores screen over-size below 15%, is put after levigate
Dry place is put, is guarded against damp, is not easy outdoor.
C auxiliary additives
Using the additive of oneself research and development configuration, additive mainly includes：Make acid-base neutralization agent, alum, adhesive by oneself
And reinforcing agent etc. is configured.
2nd, dispensing
Various material fiting ratio percentage compositions are as follows:
Bayer process red mud 45~65%, desulfurated plaster >=35%, flyash 5~15%, lime 2~10%, auxiliary addition
Agent 0.5~2.0%, amount of water are the 15~25% of whole dry measures.
3rd, it is stirred
By the material prepared by conveyer to biaxial rneader, thering is water pipe and auxiliary additive quantitatively to add in inlet end
Adding, mixing time of the material in machine can suitably be adjusted according to stirring blade angle, and mixing time is generally 5~10mi n, then by
Conveyer is sent to high temperature chuck and mediates kettle.
4th, high temperature is mediated
In high temperature mediates kettle, under capping heat preservation, temperature control is at 80~120 DEG C, 2~4h of residence time；
5th, it is still aging
Material after mediating keeps the temperature 1~3h by bonding kettle, and temperature controls 50~90 DEG C, takes out the outer natural cooling of kettle
It is aged 2~4h afterwards.
6th, rolling, extrusion forming
Material places rolling in edge runner, and the time is 5~10mi n, and thickness of feed layer control is 20~40mm.By edge runner
The material rolled is transported to brick machine through conveyer, and brick machine type has:High pressure lever, disc-rotation type, automatic liquid pressure type etc.,
Using the steam press maintenance of automatic liquid pressure type.
Manufactured adobe is piled up on tablet steam pressure vehicle, by the good adobe of code is quiet stop after tablet steam pressure vehicle, sent by track
Enter in steam pressure Fu, close Fu, the steam of 1.0 ± 0.2Mpa is passed through into Fu, heat up 2~4h, the constant temperature 1 at 140~180 DEG C
~2h, steam-cured complete rear air bleeding valve of opening exclude steam, carry out pressure release, open Fu lid cooling down end-dump cars.
7th, product
The 7d mean compressive strengths that this brick is produced with the formula are 13.86gMPa, and the compression strength of 28d is
24.22MPa reaches the requirement of national load bearing wall.Detect its mechanical property, radiation performance and wall thermal insulating thermal resistance, water absorption rate, jelly
Melting property and heat-insulating property, above-mentioned physical property meet national requirements.
The preferred embodiment of the present invention has been described above in detail, still, during present invention is not limited to the embodiments described above
Detail, within the scope of the technical concept of the present invention, a variety of simple variants can be carried out to technical scheme of the present invention, this
A little simple variants all belong to the scope of protection of the present invention.
Claims (10)
1. red mud gypsum steamed building blocks brick, it is characterised in that, with the dry red mud of Bayer process, desulfurated plaster, flyash, lime and auxiliary
Additive makees raw material, and the auxiliary additive includes the agent of self-control acid-base neutralization, alum, adhesive and reinforcing agent, wherein it is described from
Relieving haperacidity alkali nertralizer contains acid neutralizing agent and alkali nertralizer, and the acid neutralizing agent includes aluminium hydroxide, Organic Alcohol；The alkali neutralization
Agent includes acetic acid, amion acetic acid.
2. red mud gypsum steamed building blocks brick according to claim 1, which is characterized in that the raw material includes siccative and water,
Proportioning：Bayer process red mud 45~65%, desulfurated plaster >=35%, flyash 5~15%, lime 2~10%, auxiliary additive
0.5~2.0%, amount of water is the 12~25% of whole siccative amounts.
3. red mud gypsum steamed building blocks brick according to claim 1, which is characterized in that the Bayer process red mud and desulfurization stone
Cream is decreased to less than 5% using dry red mud and dry desulfurization gypsum powder, moisture.
4. red mud gypsum steamed building blocks brick according to claim 1, which is characterized in that the dry red mud of the Bayer process, desulfurization
The grinding rate of gypsum should make 90um sieve pores screen over-size below 10%；Na in the Bayer process red mud2O content should be less than 1.5%.
5. red mud gypsum steamed building blocks brick according to claim 1, which is characterized in that the dry bulk density of the flyash
More than 600kg/m3, and it contains Al if it is aluminous fly-ash2O3 >=40%, fineness should make 88um sieve pores screen over-size 15% with
Under.
6. according to the production method of any red mud gypsum steamed building blocks bricks of claim 1-5, which is characterized in that the raw material
Mix proportion scheme is:Bayer process red mud 45~65%, desulfurated plaster >=35%, flyash 5~15%, lime 2~10%, auxiliary adds
Add agent 0.5~2.0%, amount of water is the 12-25% of whole siccative amounts；
The processing step of the method is:
1. it is stirred evenly after Bayer process red mud, gypsum, lime, flyash, auxiliary additive and water are prepared according to matching method；
2. the material prepared is transported to high temperature and mediates in kettle, capping heat preservation is lower to stop the regular hour；
3. the material after mediating is aged by bonding kettle held for some time, then taking out outside kettle after natural cooling.
4. the material after ageing carries out rolling, then by the good material of rolling through brick machine compression moulding；
5. molding brick is placed into steam press maintenance in steam pressure Fu.
7. production method according to claim 6, which is characterized in that mixed material high temperature chuck mediate kettle in,
Under capping heat preservation, temperature control is at 80~120 DEG C, 2~4h of residence time.
8. production method according to claim 6, which is characterized in that the high temperature chuck mediate kettle for heat conduction oil lagging or
Person is heated with high steam, and the red mud gypsum block brick molding is using hydraulic press compression moulding.
9. production method according to claim 6, which is characterized in that the mixed material after kneading needs mediating in kettle
Heat preservation stands 1~3h, and 50~90 DEG C of holding temperature is aged 2~4h after taking out the outer natural cooling of kettle.
10. production method according to claim 6, which is characterized in that heat up 2~4h during steam press maintenance in Fu, 140
1~2h of constant temperature at~180 DEG C, 1.0 ± 0.2Mpa of relevant pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711253805.7A CN108178595A (en) | 2017-12-02 | 2017-12-02 | Bayer process red mud desulfurated plaster steamed building blocks brick and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711253805.7A CN108178595A (en) | 2017-12-02 | 2017-12-02 | Bayer process red mud desulfurated plaster steamed building blocks brick and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108178595A true CN108178595A (en) | 2018-06-19 |
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|---|---|---|---|
| CN201711253805.7A Pending CN108178595A (en) | 2017-12-02 | 2017-12-02 | Bayer process red mud desulfurated plaster steamed building blocks brick and preparation method thereof |
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2017
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Application publication date: 20180619 |