CN102557502B - Coal ash solidifying agent for coal ash building materials - Google Patents
Coal ash solidifying agent for coal ash building materials Download PDFInfo
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- CN102557502B CN102557502B CN201110411046.9A CN201110411046A CN102557502B CN 102557502 B CN102557502 B CN 102557502B CN 201110411046 A CN201110411046 A CN 201110411046A CN 102557502 B CN102557502 B CN 102557502B
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- Prior art keywords
- flyash
- fixed dose
- gypsum
- grog
- lime
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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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- Curing Cements, Concrete, And Artificial Stone (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a coal ash solidifying agent for coal ash building materials, wherein the coal ash solidifying agent comprises clinker, granulated blast-furnace slag, gypsum, lime and crystal nucleus elements, and is prepared by each raw material above in parts by weight. The coal ash solidifying agent provided by the invention can enable the adulteration quantity of coal ash in the coal ash building materials to be increased, and the reasonable utilization of coal ash is promoted; and by utilizing the coal ash solidifying agent provided by the invention, the freezing-proof capability of the coal ash building materials can be strengthened, and the prepared coal ash building materials have small dry contractibility rate and good freezing-resistant performance.
Description
Technical field
The present invention relates to material of construction production field, relate in particular to fixed dose of a kind of flyash for fly-ash building-material.
Background technology
China is in comprehensive high-speed developing period at present, and various industrial developments are rapid, drives the economic develop rapidly of China, but has also brought the problems such as resource, energy shortage, environmental pollution thereupon, economizes on resources and has become the fundamental state policy of China with protection of the environment.China is that a few usings coal as one of country of main energy sources in the world, and coal accounts for more than 75% in Energy Mix.Flyash is the powdery coal ash that fuel-burning power plant pulverized coal firing boiler is discharged, and is more common a kind of of industrial solid castoff.China's thermal power industry discharges flyash every year over 200,000,000 tons at present, but utilization ratio is only 30 ~ 40% of annual emissions.Along with the increase of power station, district heating system, the quantity discharged of flyash also will keep the trend of sustainable growth.Arrive according to estimates the year two thousand twenty, the quantity discharged of China's flyash will reach 3 times of present left and right, adds China's existing 2,000,000,000 tons of flyash accumulative total volume of cargo in storage at present, and total volume of cargo in storage will reach more than 30 hundred million tons.If so a large amount of unreasonable disposal and utilizations of flyash, not only can take a large amount of soils and deposit, and can cause the pollution of underground water, air, destroy the eubiosis.Flyash is as the solid emission of power plant, and its intractability is larger, and processing costs is high, and flyash is piled the environment of being rivals in a contest simultaneously harm, is mainly take up an area and fly upward with the wind atmosphere pollution and surrounding environment.Therefore carry out utilization of fly ash extremely important.Lot of domestic and international enterprise is devoted to the research of total utilization of PCA at present.In the comprehensive utilization of flyash, be mainly used for powdered coal ash products as building material, but because gelling and the freeze-thaw resistance of flyash are poor, not durable, easily play sand-lime, thereby the consumption of flyash is relatively low.Therefore need to provide fixed dose of a kind of new flyash with solve the fly-ash building-material of current production exist dry shrinking percentage greatly, not freeze proof problem.
Summary of the invention
The object of the invention is to propose for the problems referred to above a kind of for solve the fly-ash building-material of current production exist dry shrinking percentage greatly, fixed dose of the flyash of not freeze proof problem, fixed dose of this flyash is applicable to fly-ash building-material, can be used as the gelling material of powdered coal ash products as building material, can solve the problem that fly-ash building-material is used at cold northern area.
To achieve these goals, technical scheme of the present invention is:
Fixed dose of a kind of flyash for fly-ash building-material; the raw material that described flyash is fixed dose comprises grog, granulated blast-furnace slag, gypsum, lime, nucleus element, and the ratio of weight and number of described grog, granulated blast-furnace slag, gypsum, lime, nucleus element is:
Grog 10 ~ 30
Granulated blast-furnace slag 50 ~ 70
Gypsum 10 ~ 20
Lime 5 ~ 15
Nucleus element 2 ~ 5.
Further, the ratio of weight and number of described grog, granulated blast-furnace slag, gypsum, lime, nucleus element is:
Grog 10
Granulated blast-furnace slag 70
Gypsum 10
Lime 15
Nucleus element 5.
Further, the ratio of weight and number of described grog, granulated blast-furnace slag, gypsum, lime, nucleus element is:
Grog 30
Granulated blast-furnace slag 50
Gypsum 20
Lime 5
Nucleus element 2.
Further, the ratio of weight and number of described grog, granulated blast-furnace slag, gypsum, lime, nucleus element is:
Grog 20
Granulated blast-furnace slag 60
Gypsum 15
Lime 10
Nucleus element 4.
Further, described grog is cement clinker.
A fly ash building block, raw material comprises fixed dose of flyash and flyash, the ratio of weight and number 80:20 that described flyash and flyash are fixed dose.
A flyash standard brick, raw material comprises fixed dose of flyash and flyash, the ratio of weight and number 85:15 that described flyash and flyash are fixed dose.
A flyash floor tile, raw material comprises flyash and fixed dose of flyash, sand, described flyash, fixed dose of flyash and husky ratio of weight and number 50:30:20.
The beneficial effect that the present invention compared with prior art produces is:
1, fixed dose of flyash of the present invention can increase the addition content of flyash in fly-ash building-material, promotes the reasonable utilization of flyash;
2, fixed dose of freezing tolerance that can strengthen fly-ash building-material of flyash of the present invention, is used the dry shrinking percentage of fixed dose of fly-ash building-material of making of flyash of the present invention little, and frost resistance can be good;
3, the fixed agent prescription Raw of flyash of the present invention is simple and easy to get, between each raw material, acts synergistically, and has strengthened the fixed ability to flyash.
Embodiment
Embodiment 1
Fixed dose of a kind of flyash for fly-ash building-material; the raw material that described flyash is fixed dose comprises grog, granulated blast-furnace slag, gypsum, lime, nucleus element, and the ratio of weight and number of described grog, granulated blast-furnace slag, gypsum, lime, nucleus element is:
Grog 10 ~ 30
Granulated blast-furnace slag 50 ~ 70
Gypsum 10 ~ 20
Lime 5 ~ 15
Nucleus element 2 ~ 5.
Described grog is to take Wingdale, clay and ferriferous raw material as main raw material, and this main raw material is mixed with to raw material by suitable proportion, burn to partly or entirely melting, and through work in-process cooling and that obtain, main component is CaO, SiO
2, Al
2o
3and Fe
2o
3, and the CaO in grog, SiO
2, Al
2o
3and Fe
2o
3to exist with independent oxide compound, but two or more the aggregate of the multi mineral that generates through high-temperature chemical reaction of oxide compound.
Granulated blast-furnace slag is when the blast-furnace smelting pig iron, resultingly take the melts that silicate and silico-aluminate be main component, after quenching granulating, obtains, and mainly take unbodied vitreous structure as main, containing a small amount of crystal type mineral.
Gypsum is oblique system mineral, and main chemical compositions is calcium sulfate (CaSO
4).Gypsum is a kind of broad-spectrum Industrial materials and material of construction.Can be used for cement setting retarder, gypsum building products, Modelling, medical foodstuff additive, gas washing in SA production, filler, paint filler etc.
Lime is a kind of take the air-setting inorganic coagulation material that calcium oxide is main component, is generally with high raw materials of calcium carbonate content such as Wingdale, rhombspar, chalk, shells, through 900～1100 ℃ of calcinings, forms.
Nucleus element is a kind of ceramic through high-temperature calcination, mainly by containing CaO, SiO
2, Al
2o
3, Fe
2o
3starting material by suitable proportioning, pulverize, the hydraulic cementing materials through high-temperature calcination to partial melting gained.
Grog, granulated blast-furnace slag, gypsum, lime, nucleus element are made to fixed dose of flyash according to certain proportioning; between each raw material, act synergistically; wherein nucleus element has inducing action to the activity of slag etc., can excite the activity of other raw materials, makes it form crystallization director.The present invention is applied to fly-ash building-material by nucleus theory, fixed dose of flyash and flyash produce nucleus orientation and gather in hydration process, accelerate crystal development, make it form fast densest crystal, make thus fly-ash building-material after fixed there is higher intensity and better stability.
In the present embodiment, described grog, granulated blast-furnace slag, gypsum, lime, nucleus element are commercially available, and raw material should meet GB requirement.
The preparation method that described flyash is fixed dose is:
(1) by above-mentioned raw materials grog, granulated blast-furnace slag, gypsum, lime, the nucleus element particle to diameter≤3mm through crusher in crushing respectively;
(2) feed particles after pulverizing is mixed by above-mentioned ratio of weight and number, then mix grinding; Mix grinding is to fineness to 0.08mm, and square hole sieve tails over≤3% be finished product, the equipment that mix grinding adopts is ball mill.
1, experimental technique
Flyash sample preparation: be 1: 2.5 according to fixed dose of flyash with flyash ratio of weight and number respectively; 1: 3; 1: 4; 1: 5 four kinds of proportioning, sample is numbered respectively 1#, 2#, 3# and 4#.Add water and stir, be squeezed into the test block of diameter 50mm, high 50mm.Sample is in maintaining box after standing 24 hours, and in steam, steam-cured 10 hours (95 ℃ ± 2 ℃ of temperature), detects its single shaft unconfined compression strength in indoor placement after taking-up after 1 day.After the sample of doing frost resistance test freezes 5 hours in-15 ℃ of icehouses, taking out, is a circulation after then soaking 3 hours in 20 ℃ of water, detects its ultimate compression strength and contrast with control group after 15 circulations.The preparation of single shaft unconfined compression strength sample and strength detecting method are according to JTJ 051-93 < < highway earthwork test rule > >.
2, experimental data
Test-results is according to the method described above listed following table in.
By upper table, can find out,, the intensity of test specimen does not only reduce the strength ratio to flyash test specimen before and after freeze thawing, has on the contrary rising to a certain degree.When solidifying agent and flyash proportion are 1:2.5, the gain in strength 6% of test specimen 1#; When proportioning is 1:3, the gain in strength 5% of test specimen 2#; When proportioning is 1:4,1:5, the gain in strength of test specimen surpasses 14%, according to relevant national standard, after freeze thawing test specimen intensity in certain loss range, be all considered as qualified.Therefore, fixed dose of freezing tolerance that can strengthen fly-ash building-material of flyash of the present invention.
Embodiment 2
The present embodiment is the improvement of carrying out on the basis of embodiment 1, the part identical with embodiment 1 in the present embodiment, please refer to disclosed content in embodiment 1 and understand, the disclosed content of embodiment 1 should, as the content of the present embodiment, not be repeated in this description herein yet.
The ratio of weight and number of described grog, granulated blast-furnace slag, gypsum, lime, nucleus element is:
Grog 10
Granulated blast-furnace slag 70
Gypsum 10
Lime 15
Nucleus element 5.
In the present embodiment, grog is from Beijing sales branch of Shuan Shan cement clinker company limited, and granulation blast-furnace slag is from Shoudu Iron and Steel Co slag, and gypsum and lime are commercially available prod, and the product of right building materials Science and Technology Ltd. of nucleus Su Shi Beijing Hang Seng is on sale in the market.
Test method is identical with embodiment 1.
Experimental data sees the following form:
Embodiment 3
The present embodiment is the improvement of carrying out on the basis of embodiment 1, the part identical with embodiment 1 in the present embodiment, please refer to disclosed content in embodiment 1 and understand, the disclosed content of embodiment 1 should, as the content of the present embodiment, not be repeated in this description herein yet.
The ratio of weight and number of described grog, granulated blast-furnace slag, gypsum, lime, nucleus element is:
Grog 30
Granulated blast-furnace slag 50
Gypsum 20
Lime 5
Nucleus element 2.
Each raw material in the present embodiment to derive from embodiment 2 identical.
Test method is identical with embodiment 1.
Experimental data sees the following form:
Embodiment 4
The present embodiment is the improvement of carrying out on the basis of embodiment 1, the part identical with embodiment 1 in the present embodiment, please refer to disclosed content in embodiment 1 and understand, the disclosed content of embodiment 1 should, as the content of the present embodiment, not be repeated in this description herein yet.
The ratio of weight and number of described grog, granulated blast-furnace slag, gypsum, lime, nucleus element is:
Grog 20
Granulated blast-furnace slag 60
Gypsum 15
Lime 10
Nucleus element 4.
Each raw material in the present embodiment to derive from embodiment 2 identical.
Test method is identical with embodiment 1.
Experimental data sees the following form:
Embodiment 5
The present embodiment is the improvement of carrying out on the basis of embodiment 1, the part identical with embodiment 1 in the present embodiment, please refer to disclosed content in embodiment 1 and understand, the disclosed content of embodiment 1 should, as the content of the present embodiment, not be repeated in this description herein yet.
Grog described in fixed dose of flyash of the present invention is cement clinker.
Grog described in the present embodiment is Portland clinker, and main chemical compositions is CaO, SiO
2with a small amount of Al
2o
3, Fe
2o
3, essential mineral consists of tricalcium silicate, Dicalcium Phosphate (Feed Grade) and tetracalcium aluminoferrite, wherein cement clinker composition C
3a≤5%.
Embodiment 6
The present embodiment is the improvement of carrying out on the basis of embodiment 1, the part identical with embodiment 1 in the present embodiment, please refer to disclosed content in embodiment 1 and understand, the disclosed content of embodiment 1 should, as the content of the present embodiment, not be repeated in this description herein yet.
A fly ash building block, raw material comprises fixed dose of flyash and flyash, the ratio of weight and number 80:20 that described flyash and flyash are fixed dose.
Fixed dose of described flyash is fixed dose of the resulting flyash of embodiments of the invention 1.
Flyash is the original state flyash that fuel-burning power plant pulverized coal firing boiler is discharged, and its chemical composition comprises oxide compound and the sulfide such as silicon-dioxide and aluminium sesquioxide (account for total amount 65～85%) and a small amount of iron, magnesium, potassium, sodium.Flyash itself has good volcanic ash and latent hydraulicity energy, has a large amount of microballons in flyash, has long-pending compared with small specific surface.Add after fixed dose of flyash of the present invention, fixed dose of flyash and flyash produce nucleus orientation and gather in hydration process, can accelerate crystal development, make it form fast densest crystal, thereby make the fly ash building block forming there is higher strength and stability.Adopt flyash in fixed dose of made fly ash building block of flyash of the present invention to account for 80%, far above of the prior art 60%, can strengthen like this consumption of flyash, increase flyash consumption, reduce flyash and pile up the pollution causing, economize on resources.
The preparation technology of fly ash building block is: flyash, fixed dose of flyash, water are put into stirrer by ratio of weight and the number of copies and mix, through rotary conveyor by mixed materials conveyance to block machine, compression moulding enters the maintenance of vapor cure firing chamber by waggon, and the product after maintenance is finished product.The mixture that described flyash and flyash are fixed dose and the ratio of weight and number of water are 84:16.In the present embodiment, the forming pressure of fly ash building block is greater than 0.5MPa.
Embodiment 7
The present embodiment is the improvement of carrying out on the basis of embodiment 1, the part identical with embodiment 1 in the present embodiment, please refer to disclosed content in embodiment 1 and understand, the disclosed content of embodiment 1 should, as the content of the present embodiment, not be repeated in this description herein yet.
A flyash standard brick, raw material comprises fixed dose of flyash and flyash, the ratio of weight and number 85:15 that described flyash and flyash are fixed dose.
Fixed dose of described flyash is fixed dose of the resulting flyash of embodiments of the invention 1.
The preparation technology of flyash standard brick is: flyash, fixed dose of flyash, water are put into stirrer by ratio of weight and the number of copies and mix, through rotary conveyor by mixed materials conveyance to forming machine, compression moulding enters the maintenance of vapor cure firing chamber by waggon, and the product after maintenance is finished product.The mixture that described flyash and flyash are fixed dose and the ratio of weight and number of water are 85:15.In the present embodiment, the forming pressure of flyash standard brick is greater than 0.5MPa.
Embodiment 8
The present embodiment is the improvement of carrying out on the basis of embodiment 1, the part identical with embodiment 1 in the present embodiment, please refer to disclosed content in embodiment 7 and understand, the disclosed content of embodiment 1 should, as the content of the present embodiment, not be repeated in this description herein yet.
A flyash floor tile, raw material comprises flyash and fixed dose of flyash, sand, described flyash, fixed dose of flyash and husky ratio of weight and number 50:30:20.
Fixed dose of described flyash is fixed dose of the resulting flyash of embodiments of the invention 1.
The preparation technology of flyash floor tile is: flyash, fixed dose of flyash, Sha Heshui are put into stirrer by ratio of weight and the number of copies and mix, through rotary conveyor by mixed materials conveyance to forming machine, compression moulding enters the maintenance of vapor cure firing chamber by waggon, and the product after maintenance is finished product.Described flyash, fixed dose of flyash and the mixture of sand and the ratio of weight and number of water are 82:18.In the present embodiment, the forming pressure of flyash floor tile is greater than 0.5MPa.
Claims (7)
1. the flyash for fly-ash building-material is fixed dose; it is characterized in that: the raw material that described flyash is fixed dose comprises grog, granulated blast-furnace slag, gypsum, lime, nucleus element, and the ratio of weight and number of described grog, granulated blast-furnace slag, gypsum, lime, nucleus element is:
Grog 10 ~ 30
Granulated blast-furnace slag 50 ~ 70
Gypsum 10 ~ 20
Lime 5 ~ 15
Nucleus element 2 ~ 5
The preparation method that described flyash is fixed dose is:
(1) by above-mentioned raw materials grog, granulated blast-furnace slag, gypsum, lime, the nucleus element particle to diameter≤3mm through crusher in crushing respectively;
(2) feed particles after pulverizing is mixed by above-mentioned ratio of weight and number, then mix grinding; Mix grinding is to fineness to 0.08mm, and square hole sieve tails over≤3% be finished product, the equipment that mix grinding adopts is ball mill;
Described grog is Portland clinker, and main chemical compositions is CaO, SiO
2with a small amount of Al
2o
3, Fe
2o
3, essential mineral consists of tricalcium silicate, Dicalcium Phosphate (Feed Grade) and tetracalcium aluminoferrite, wherein cement clinker composition C
3a≤5%.
2. flyash according to claim 1 is fixed dose, it is characterized in that the ratio of weight and number of described grog, granulated blast-furnace slag, gypsum, lime, nucleus element is:
Grog 10
Granulated blast-furnace slag 70
Gypsum 10
Lime 15
Nucleus element 5.
3. flyash according to claim 1 is fixed dose, it is characterized in that the ratio of weight and number of described grog, granulated blast-furnace slag, gypsum, lime, nucleus element is:
Grog 30
Granulated blast-furnace slag 50
Gypsum 20
Lime 5
Nucleus element 2.
4. flyash according to claim 1 is fixed dose, it is characterized in that the ratio of weight and number of described grog, granulated blast-furnace slag, gypsum, lime, nucleus element is:
Grog 20
Granulated blast-furnace slag 60
Gypsum 15
Lime 10
Nucleus element 4.
5. a fly ash building block, raw material comprises fixed dose of flyash and flyash claimed in claim 1, it is characterized in that the ratio of weight and number 80:20 of fixed dose of described flyash and flyash.
6. a flyash standard brick, raw material comprises fixed dose of flyash and flyash claimed in claim 1, it is characterized in that the ratio of weight and number 85:15 of fixed dose of described flyash and flyash.
7. a flyash floor tile, raw material comprises flyash and fixed dose of flyash claimed in claim 1, sand, it is characterized in that described fixed dose of flyash, flyash and husky ratio of weight and number 50:30:20.
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|---|---|---|---|
| CN201110411046.9A CN102557502B (en) | 2011-12-12 | 2011-12-12 | Coal ash solidifying agent for coal ash building materials |
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|---|---|---|---|
| CN201110411046.9A CN102557502B (en) | 2011-12-12 | 2011-12-12 | Coal ash solidifying agent for coal ash building materials |
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|---|---|
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| CN107021781A (en) * | 2017-04-01 | 2017-08-08 | 三明学院 | Construction material and its application method are built in a kind of wall spray |
| CN107117973A (en) * | 2017-04-01 | 2017-09-01 | 三明学院 | A kind of green novel fire-resistant mortar and its manufacture method |
| CN111646767A (en) * | 2020-05-21 | 2020-09-11 | 贵州开磷磷石膏综合利用有限公司 | Application of heat-preservation refractory gypsum powder |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101343167A (en) * | 2007-07-10 | 2009-01-14 | 中国矿业大学(北京) | Backfilled enclosed material and its use method |
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| CN101343167A (en) * | 2007-07-10 | 2009-01-14 | 中国矿业大学(北京) | Backfilled enclosed material and its use method |
Non-Patent Citations (2)
| Title |
|---|
| "高掺量粉煤灰水泥制备方法及其力学性能分析";刘文永等;《煤炭科学技术》;20091130;第37卷(第11期);121-124 * |
| 刘文永等."高掺量粉煤灰水泥制备方法及其力学性能分析".《煤炭科学技术》.2009,第37卷(第11期),121-124. |
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Effective date of registration: 20170109 Address after: 100160 Beijing City, East Road, Fengtai District, building 6, No. 3, building 1, unit 11, 1101-C15 (Park) Patentee after: Beijing Qing River Environmental Protection Technology Co., Ltd. Address before: 100078 Beijing city Fengtai District South Sanhuan Road No. 25 Dong Runda three storey commercial building Patentee before: Beijing Hengshengran Building Materials Technology Co.,Ltd. |
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Granted publication date: 20141022 Termination date: 20171212 |