CN108675745A - A kind of autoclaved fly ash brick and preparation method thereof prepared using incineration of refuse flyash - Google Patents
A kind of autoclaved fly ash brick and preparation method thereof prepared using incineration of refuse flyash Download PDFInfo
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- CN108675745A CN108675745A CN201810765075.7A CN201810765075A CN108675745A CN 108675745 A CN108675745 A CN 108675745A CN 201810765075 A CN201810765075 A CN 201810765075A CN 108675745 A CN108675745 A CN 108675745A
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- incineration
- fly ash
- flyash
- refuse flyash
- raw material
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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
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- 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 autoclaved fly ash brick and preparation method thereof that the present invention relates to a kind of to be prepared using incineration of refuse flyash, it is raw material by flyash, quick lime, incineration of refuse flyash and desulfurated plaster, is prepared through hydro-thermal reaction after compression moulding, wherein, calcium silicon ratio is 1.0~1.3, the specific steps are：Flyash, quick lime, incineration of refuse flyash and desulfurized gypsum dry is taken to be mixed even；The deionized water of raw material gross mass 15~25% is added in uniformly mixed raw material, grinds later, water is made to be come into full contact with raw material；Ground raw material are fitted into mold, compression moulding and are demoulded on tablet press machine, molding test block is obtained；Molding test block is placed in hydrothermal reaction kettle and carries out hydro-thermal reaction, obtains product.Autoclaved fly ash brick of the present invention has the advantages such as intensity is high, not easy to crack, frost resistance is good, not only reduces cement and uses, also dissolves solid waste coal ash, incineration of refuse flyash, mitigate the burden of environment, reduce cost, contribute to energy-saving and emission-reduction.
Description
Technical field
The present invention relates to building material fields, more particularly, to a kind of autoclaved fly ash prepared using incineration of refuse flyash
Brick and preparation method thereof.
Background technology
It is well known that the production of cement not only causes a large amount of exploitations, a large amount of consumption of the energy of land resource, but also in life
Serious air pollution can be caused by producing the dust generated in the process or particulate matter.Therefore, using similar with chemistry of cement component
Solid waste replaces cement by raw material part, it has also become realizes the energy that economizes on resources, one of the important measure of environmental protection.
Flyash, city garbage burning flying ash, desulfurated plaster have gradually been known as the huge solid waste of yield.
Flyash is the fine particle shape residue after pulverized coal friring, is mainly derived from power plant's powder coal stove and fluidized bed furnace,
It is the primary solids waste of coal-burning power plant's discharge, the 1t coals that often burn generate 250~300kg flyash.With flying for economic construction
Speed development, the discharge capacity of flyash is growing day by day, discharge over the years plus utilize and the flyash total amount stored up up to 2,500,000,000 t with
On, constantly rise with generated energy, flyash discharge capacity increases year by year, and flyash has become accumulation heap reserves and occupies cultivated land most
One of more trade waste, seriously pollutes atmospheric environment at the problems such as also having thereby resulted in the stacking and floating of flyash, also
Serious harmful effect may be caused to health.
With the quickening of urbanization process, the discharge capacity of urban waste is also rapidly increasing.In order to effectively destroy rubbish
Poisonous and harmful substance in rubbish and reduce garbage bulk, city garbage burning processing with its with apparent minimizing, sterilization,
The advantages that recycling, has obtained wide application in recent years.Incineration residue is under the fire grate of waste incinerator and flue gas removes
The effluent that the collections such as dirt device, waste heat boiler are got off, the uncombusted organic matter of mainly non-flammable inorganic matter and part,
Middle flying dust refers to residue obtained from flue gas purification system is collected, and accounts for about lime-ash 10%~20%.Flying dust is as disposed accidentally also
Secondary pollution can be caused to environment.
Limestone-gypsum wet flue gas desulfurization technology is the sulfur removal technology that coal-burning power plant is most widely used, in desulfurization
Another trade waste is produced in the process --- desulfurated plaster.As country proposes 35mg/ to industrial discharge sulfur dioxide
m3Limit value requirement, the mating desulfurizer rapid growth of industry, the annual output of desulfurated plaster will reach 80,000,000 tons or more.Such as
The a large amount of desulfurated plaster of fruit cannot be disposed properly, be not only the waste to resource, or even can cause secondary pollution.
Currently, therefore the discharge of a large amount of industrial solid castoffs is reduced with energy saving, sharp useless, environmental protection theory significant departure
Cement consumption, the recycling for enhancing solid waste are the effective ways for making the sustainable development of mankind Community health.
Invention content
The purpose of the present invention is exactly to provide a kind of steam pressure prepared using incineration of refuse flyash to solve the above-mentioned problems
Flyash brick and preparation method thereof.
The purpose of the present invention is achieved through the following technical solutions：
It is a kind of using incineration of refuse flyash prepare autoclaved fly ash brick, by flyash, quick lime, incineration of refuse flyash and
Desulfurated plaster is raw material, is prepared through hydro-thermal reaction after compression moulding, wherein calcium silicon ratio is 1.0~1.3.
Further, the weight percent of the flyash, quick lime, incineration of refuse flyash and desulfurated plaster is, can be
More tobermorite is generated when hydro-thermal reaction, improves the overall performance of autoclaved fly ash brick：
Further, the flyash is fly ash in electric power plant, and the incineration of refuse flyash is city garbage burning flying ash, institute
State the calcium oxide content ＞ 95% of quick lime.
A kind of preparation method of the autoclaved fly ash brick prepared using incineration of refuse flyash, is included the following steps：
(1) flyash, quick lime, incineration of refuse flyash and desulfurized gypsum dry is taken to be mixed even；
(2) deionized water of raw material gross mass 15~25% is added in uniformly mixed raw material, grinds, makes later
Water comes into full contact with raw material；
(3) ground raw material are fitted into mold, compression moulding and are demoulded on tablet press machine, obtain molding test block；
(4) molding test block is placed in hydrothermal reaction kettle and carries out hydro-thermal reaction to get to product.
Further, the addition of step (2) deionized water is raw material gross mass 20%.
Further, the pressure of step (3) tablet press machine compression moulding is 10~25MPa.
Further, the pressure of step (3) tablet press machine compression moulding is 20MPa.
Further, in step (4) hydrothermal reaction kettle be added reaction kettle total measurement (volume) 10~20% deionized water, and
A holder for being higher than the water surface is put into hydrothermal reaction kettle, the molding test block is placed on holder.
Further, 10% deionized water of reaction kettle total measurement (volume) is added in step (4) hydrothermal reaction kettle.
Further, step (4) molding test block hydro-thermal reaction when, reaction temperature be 180~240 DEG C, constant temperature time be 5~
20h。
Further, when step (4) molding test block hydro-thermal reaction, reaction temperature is 220 DEG C, constant temperature time 10h, the work
The tobermorite of well-crystallized can be obtained in skill condition.
The present invention uses flyash to make as siliceous predecessor, quick lime and city garbage burning flying ash (all instead of cement)
For calcareous predecessor, desulfurated plaster determines best compression moulding technique (briquetting pressure, molding plus water as complementary raw material
Amount), best hydro-thermal synthesis process (reaction time, reaction temperature etc.) and best calcium silicon ratio etc., repressed molding, hydrothermal synthesis system
Standby materials for wall：Autoclaved fly ash brick.Relative to other materials for walls, autoclaved fly ash brick of the present invention has intensity height, is not easy
Cracking, the advantages such as frost resistance is good, not only reduce the use of cement, have also dissolved solid waste coal ash, municipal refuse is burnt
Flying dust is burnt, the burden of environment is alleviated, reduces cost, decrease resource consumption, contribute to energy-saving and emission-reduction.
Tobermorite has excellent performances, flyash and the waste incinerations such as lightweight, high-strength, thermal coefficient is low, high temperature resistant
Contain CaO, SiO in flying dust2Equal ingredients, have the potential quality as hydrothermal synthesis tobermorite.In the technique item of the present invention
Under part, the introducing of incineration of refuse flyash is mixed in certain answering than under with flyash, and calcium source and silicon source can fully react generation knot
Brilliant good tobermorite, and along with the generation of a certain amount of Hydrogrossular, the two are interlocked calking so that structure more causes
It is close, significantly improve the compression strength (10~20MPa) of autoclaved fly ash brick；And anti-freezing property reaches materials for wall requirement, rubbish
The introducing of rubbish flying ash not only reduces cement consumption, and effectively recycling provides for city garbage burning flying ash
Approach has achieved the purpose that economize on resources, the treatment of wastes with processes of wastes against one another, with good economic efficiency and social benefit.
Specific implementation mode
To make the object, technical solutions and advantages of the present invention be more clear, below in conjunction with specific example, the present invention is carried out
It is further described.Described herein specific examples are only used to explain the present invention, does not limit the present invention.
Following embodiments are using the flyash of coal-burning power plant's discharge, city garbage burning flying ash, industrial quick lime and take off
Sulphur gypsum is raw material, hydrothermal synthesis autoclaved fly ash brick.Flyash, city garbage burning flying ash and desulfurated plaster it is main at
Divide and is shown in Table 1.
Main chemical compositions (the unit of 1 flyash of table and city garbage burning flying ash：Wt%)
Embodiment 1
A method of autoclaved fly ash brick being prepared using incineration of refuse flyash, is comprised the steps of：
S1：Ca/Si is set as 1.26, weighs flyash 5.30g, city garbage burning flying ash 2.60g, quick lime respectively
1.80g and desulfurated plaster 0.30g.Raw material are fully dry-mixed, are uniformly mixed；
S2：The raw material being uniformly mixed in S1 are put into agate mortar, the deionized water of 2g is weighed, pours into agate mortar
In, it is ground, water is made to be come into full contact with raw material；
S3：Raw material ground in S2 are fitted into mold, compression moulding (the compression moulding pressure on tablet press machine
It 20MPa) and demoulds, obtains molding test block；
S4：The deionized water for weighing 50g, is added in the reaction kettle of 500ml.It is put into one in a kettle higher than the water surface
Holder；The test block obtained in S3 is put on the holder in reaction kettle and carries out hydro-thermal reaction, reaction temperature is 220 DEG C, when constant temperature
Between be 10h.
The autoclaved fly ash brick performance parameter of gained is shown in Table 2：
The performance parameter of autoclaved fly ash brick made from 2 embodiment of table, 1 city garbage burning flying ash
Embodiment 2
A method of autoclaved fly ash brick being prepared using incineration of refuse flyash, is comprised the steps of：
S1：Ca/Si is set as 1.20, weighs flyash 5.26g, city garbage burning flying ash 2.94g, quick lime respectively
1.50g and desulfurated plaster 0.30g.Raw material are fully dry-mixed, are uniformly mixed；
S2：The raw material being uniformly mixed in S1 are put into agate mortar, the deionized water of 2g is weighed, pours into agate mortar
In, it is ground, water is made to be come into full contact with raw material；
S3：Raw material ground in S2 are fitted into mold, compression moulding (the compression moulding pressure on tablet press machine
It 20MPa) and demoulds, obtains molding test block；
S4：The deionized water for weighing 50g, is added in the reaction kettle of 500ml.It is put into one in a kettle higher than the water surface
Holder；The test block obtained in S3 is put on the holder in reaction kettle and carries out hydro-thermal reaction, reaction temperature is 220 DEG C, when constant temperature
Between be 10h.
The autoclaved fly ash brick performance parameter of gained is shown in Table 3：
The performance parameter of autoclaved fly ash brick made from 3 embodiment of table, 2 city garbage burning flying ash
Embodiment 3
A method of autoclaved fly ash brick being prepared using incineration of refuse flyash, is comprised the steps of：
S1：Ca/Si is set as 1.10, weighs flyash 5.71g, city garbage burning flying ash 2.89g, quick lime respectively
1.40g and desulfurated plaster 0.30g, raw material are fully dry-mixed, are uniformly mixed；
S2：The raw material being uniformly mixed in S1 are put into agate mortar, the deionized water of 2g is weighed, pours into agate mortar
In, it is ground, water is made to be come into full contact with raw material；
S3：Raw material ground in S2 are fitted into mold, compression moulding (the compression moulding pressure on tablet press machine
It 20MPa) and demoulds, obtains molding test block；
S4：The deionized water for weighing 50g, is added in the reaction kettle of 500ml.It is put into one in a kettle higher than the water surface
Holder；The test block obtained in S3 is put on the holder in reaction kettle and carries out hydro-thermal reaction, reaction temperature is 220 DEG C, when constant temperature
Between be 10h.
The autoclaved fly ash brick performance parameter of gained is shown in Table 4：
The performance parameter of autoclaved fly ash brick made from 4 embodiment of table, 3 city garbage burning flying ash
After testing, three embodiments use the compression strength of autoclaved fly ash brick made from city garbage burning flying ash
It is all higher than 10Mpa, the freeze proof requirement of 15 Frozen-thawed cycleds can be subjected to, reach JC/T239-2014《Autoclaved fly ash brick》In
The requirement of MU10.
Claims (10)
1. a kind of autoclaved fly ash brick prepared using incineration of refuse flyash, which is characterized in that by flyash, quick lime, rubbish
Flying ash and desulfurated plaster are raw material, are prepared through hydro-thermal reaction after compression moulding, wherein calcium silicon ratio is 1.0~1.3.
2. a kind of autoclaved fly ash brick prepared using incineration of refuse flyash according to claim 1, which is characterized in that institute
The weight percent for stating flyash, quick lime, incineration of refuse flyash and desulfurated plaster is：
3. a kind of autoclaved fly ash brick prepared using incineration of refuse flyash according to claim 1 or 2, feature are existed
In the flyash is fly ash in electric power plant, and the incineration of refuse flyash is city garbage burning flying ash, the oxidation of the quick lime
Calcium content ＞ 95%.
4. a kind of a kind of preparation method of the autoclaved fly ash brick prepared using incineration of refuse flyash as described in claim 1,
It is characterized by comprising the following steps：
(1) flyash, quick lime, incineration of refuse flyash and desulfurized gypsum dry is taken to be mixed even；
(2) deionized water of raw material gross mass 15~25% is added in uniformly mixed raw material, grinds later, make water with
Raw material come into full contact with；
(3) ground raw material are fitted into mold, compression moulding and are demoulded on tablet press machine, obtain molding test block；
(4) molding test block is placed in hydrothermal reaction kettle and carries out hydro-thermal reaction to get to product.
5. a kind of preparation method of autoclaved fly ash brick prepared using incineration of refuse flyash according to claim 4,
It is characterized in that, the addition of step (2) deionized water is raw material gross mass 20%.
6. a kind of preparation method of autoclaved fly ash brick prepared using incineration of refuse flyash according to claim 4,
It is characterized in that, the pressure of step (3) tablet press machine compression moulding is 10~25MPa.
7. a kind of preparation method of autoclaved fly ash brick prepared using incineration of refuse flyash according to claim 4,
It is characterized in that, the pressure of step (3) tablet press machine compression moulding is 20MPa.
8. a kind of preparation method of autoclaved fly ash brick prepared using incineration of refuse flyash according to claim 4,
It is characterized in that, 10~20% deionized water of reaction kettle total measurement (volume) is added in step (4) hydrothermal reaction kettle, and in hydro-thermal reaction
A holder for being higher than the water surface is put into kettle, the molding test block is placed on holder.
9. a kind of preparation method of autoclaved fly ash brick prepared using incineration of refuse flyash according to claim 4,
It is characterized in that, when step (4) is molded test block hydro-thermal reaction, reaction temperature is 180~240 DEG C, and constant temperature time is 5~20h.
10. a kind of preparation method of autoclaved fly ash brick prepared using incineration of refuse flyash according to claim 4,
It is characterized in that, when step (4) is molded test block hydro-thermal reaction, reaction temperature is 220 DEG C, constant temperature time 10h.
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|---|---|---|---|---|
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| CN102515826A (en) * | 2011-12-08 | 2012-06-27 | 河南建益达实业有限公司 | Autoclaved fly ash aerated concrete building block and production method thereof |
| CN104446182A (en) * | 2014-11-05 | 2015-03-25 | 高路恒 | Light energy-saving type concrete block |
| CN107159091A (en) * | 2017-07-27 | 2017-09-15 | 同济大学 | A kind of high-performance heavy-metal adsorption material of calcic silicon and preparation method thereof |
-
2018
- 2018-07-12 CN CN201810765075.7A patent/CN108675745A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101397198A (en) * | 2008-10-30 | 2009-04-01 | 上海大学 | Composite blending material for concrete and preparation method thereof |
| CN102515826A (en) * | 2011-12-08 | 2012-06-27 | 河南建益达实业有限公司 | Autoclaved fly ash aerated concrete building block and production method thereof |
| CN104446182A (en) * | 2014-11-05 | 2015-03-25 | 高路恒 | Light energy-saving type concrete block |
| CN107159091A (en) * | 2017-07-27 | 2017-09-15 | 同济大学 | A kind of high-performance heavy-metal adsorption material of calcic silicon and preparation method thereof |
Non-Patent Citations (4)
| Title |
|---|
| 彭红等: "《建筑材料》", 31 January 2018, 重庆大学出版社 * |
| 朱维益: "《砌筑工程》", 31 October 1997, 中国建筑工业出版社 * |
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Application publication date: 20181019 |