CN105130300A - Desulfurized fly ash slag building material product and production method thereof - Google Patents
Desulfurized fly ash slag building material product and production method thereof Download PDFInfo
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- CN105130300A CN105130300A CN201510519616.4A CN201510519616A CN105130300A CN 105130300 A CN105130300 A CN 105130300A CN 201510519616 A CN201510519616 A CN 201510519616A CN 105130300 A CN105130300 A CN 105130300A
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Abstract
The invention discloses a desulfurized fly ash slag building material product and a production method thereof, and relates to the technical field of building materials. The method comprises the following steps: mixing desulfurized fly ash with slag fine powder according to a ratio of 1:0.25-4, adding water accounting for 20-30% of the total mass of the desulfurized fly ash and the slag fine powder to produce a test block, putting the test block in a curing box, and curing for 24h; carbonizing the cured test block on the basis of guaranteeing the water content to be 25% in a carbonization reaction kettle for 2h; and putting the carbonized test block in water, and curing for 24h to obtain the building material product with excellent performances, such as masonry bricks, built bricks and floor tiles. The building material product can be used in building engineering. The production method has the characteristics of simplicity, low cost and high production efficiency; and the desulfurized fly ash slag building material product produced in the invention has the advantages of high compressive strength and good stability, and can substitute cement or clay products. The desulfurized fly ash slag is greatly used, and a large amount of the slag is used and is changed into valuables, so the method is of great significance to save land resources, protect environment, improve the quality of the building engineering and realize sustainable development.
Description
Technical field
The invention belongs to building material technical field, particularly relate to a kind of desulfurized powder flyash and steel slag building material made and preparation method thereof.
Background technology
China's industrialization and urbanization is fast-developing, and resources and energy consumption sustainable growth, environment will face unprecedented pressure.For realizing building a well-off society in an all-round way to the requirement of environmental quality, China should hold on to the transitional period of socio-economic development and solve the period of strategic opportunity of great environmental problem, propelling clean energy utilizes, implement multi-pollutant Collaborative Control, significantly cut down pollutant discharge amount, the coordinated development of thrust zone ecnomics and enviroment.
Along with the widespread use of power plant's circulating fluidized bed desulfurization technique in recent years, create a large amount of circulating fluidized bed desulfur flyash, these desulphurize fly ash activity be low, water requirement is large, calcic and sulfur content high, be unfavorable for direct application.
And the place that China is used for stacking desulfurized powder coal ash is fewer and feweri, therefore, exploitation desulfurized powder ash application technology, reduces desulfurized powder coal ash land occupation, avoids desulfurized powder coal ash to cause secondary pollution to environment, have obvious social benefit and environmental benefit.
At present, the Application way of desulfurized powder coal ash comprise grinding process (grinding is to certain fineness), chemical treatment (adding chemical substance to excite), as cement or concrete admixture, as modes such as steam-cured building block or bricks, wherein, there is high, the high in cost of production problem of power consumption in grinding process; The problems such as chemical treatment exists bad adaptability, product performance fluctuation is large with material composition change; There is the problems such as volume scope is little, product performance fluctuation is large as cement or concrete admixture; There is the problems such as the production cycle is long, easy to crack as steam-cured building block or brick.
Summary of the invention
In order to overcome above-mentioned defect, the present invention passes through carbonating process, calcium oxide in Appropriate application desulfurized powder coal ash and the calcium oxide component in slag, the growing rule of strength of research carbonization product, Optimization Technology technical parameter and relevant device, determine the optimum matching relation of desulfurized powder coal ash and slag, preparation can replace the material of construction of cement products or clay-ware.
The present invention is from the angle of comprehensive utilization desulfurized powder coal ash, slag, take carbonation process and technique, prepare environmentally friendly building material made, be applied in construction work, industrial residue can be utilized in a large number, turn waste into wealth, to minimizing environmental pollution, economize the land resource, improve construction engineering quality, to reduce the aspect such as construction cost significant.
The object of the invention is to overcome the shortcomings such as the power consumption existed in desulfurized powder ash application is in the past high, cost is high, the production cycle is long, product performance fluctuation is large, easy to crack, provide that a kind of technique is simple, cost is low, the preparation method of the flyash slag building material made of excellent performance.
The technical solution adopted for the present invention to solve the technical problems is: a kind of preparation method of desulfurized powder flyash and steel slag building material made, it is characterized in that, to be desulfurized powder coal ash, the mixing of slag fine powder of 1:0.25 ~ 4 in mass ratio, add water, the add-on of described water accounts for the 20%-30% of desulfurized powder coal ash and slag fine powder total mass; Make test block, carry out first time aquation maintenance successively, carbonized maintaining, for the second time aquation maintenance, drying obtain desulfurized powder flyash and steel slag building material made.
The present invention carries out second time aquation, can obtain hydrated calcium silicate, is conducive to the raising of product ultimate compression strength.
Described desulfurized powder coal ash is circulating fluidized bed desulfur flyash or wet process of FGD flyash.The calcium oxide content of preferred cycle fluid-bed sweetening flyash is high, is conducive to carbonization and improves product strength.
The granularity of preferred described slag fine powder is 150 ~ 300um, like this can sufficient reacting.
In preferred described slag fine powder, the massfraction of calcium oxide is 35 ~ 40%.Calcium oxide content is high, is conducive to carbonization and improves product strength.
The purity 99.5% of preferred described carbonized maintaining carbon dioxide in process, is conducive to improving speed of response and ensureing that carburizing reagent is normally carried out.
The condition of preferred second time aquation maintenance is: temperature 10-30 DEG C, can improve hydration reaction speed like this.
The present invention also provides a kind of desulfurized powder flyash and steel slag building material made, and its main component comprises calcium carbonate, hydrated calcium silicate.
The invention has the beneficial effects as follows: the present invention utilizes flyash, slag two kinds of trade wastes and do not need alkali-activator, carries out first time aquation, carbonating, second time aquation, can obtain the desulfurized powder flyash and steel slag building material made of excellent performance.This de-sulphur preparing process technique is simple, cost is low, and the desulfurized powder flyash and steel slag building material made excellent performance obtained, has the advantages such as production efficiency is high, ultimate compression strength is high, good stability, can replace the material of construction of cement products or clay-ware.The present invention can utilize desulfurized powder coal ash largely, and utilizes slag in a large number, turns waste into wealth, and to economizing the land resource, environment protection, raising construction engineering quality, to reduce the aspect such as construction cost, Sustainable development significant.
Embodiment
Embodiment 1
By 4.0g desulfurized powder coal ash (circulating fluidized bed desulfur flyash, Dalian enterprise produce), 16.0g slag fine powder (150 ~ 300um, the massfraction of calcium oxide is 35 ~ 40%, Dalian enterprise produces) mix, add 5.0 grams of water and make 2cm × 2cm × 2cm test block, put into maintaining box and carry out first time maintenance (curing condition: temperature is 20-30 DEG C, humidity is 90-95%), curing time is 24h, record intensity and quality; Carburizing reagent still (pressure 0.2Mpa, CO is put into again on the basis of guarantee 25% water ratio
2purity 99.5%, 20-30 DEG C) middle carbonization 2h, record intensity and quality; Finally putting into water again carries out second time maintenance (temperature 10-30 DEG C), and curing time is 24h, record intensity and quality.Obtain desulfurized powder flyash and steel slag building material made T-1, its main component comprises calcium carbonate, hydrated calcium silicate.
Embodiment 2
By 8.0g desulfurized powder coal ash (circulating fluidized bed desulfur flyash, Dalian enterprise produce), 12.0g slag fine powder (150 ~ 300um, the massfraction of calcium oxide is 35 ~ 40%, Dalian enterprise produces) mix, add 5.0 grams of water and make 2cm × 2cm × 2cm test block, put into maintaining box and carry out first time maintenance (curing condition: temperature is 20-30 DEG C, humidity is 90-95%), curing time is 24h, record intensity and quality; Carburizing reagent still (pressure 0.2Mpa, CO is put into again on the basis of guarantee 25% water ratio
2purity 99.5%, 20-30 DEG C) middle carbonization 2h, record intensity and quality; Finally putting into water again carries out second time maintenance (temperature 10-30 DEG C), and curing time is 24h, record intensity and quality.Obtain desulfurized powder flyash and steel slag building material made T-2.
Embodiment 3
By 12.0g desulfurized powder coal ash (circulating fluidized bed desulfur flyash, Dalian enterprise produce), 8.0g slag fine powder (150 ~ 300um, the massfraction of calcium oxide is 35 ~ 40%, Dalian enterprise produces) mix, add 5.0 grams of water and make 2cm × 2cm × 2cm test block, put into maintaining box and carry out first time maintenance (curing condition: temperature is 20-30 DEG C, humidity is 90-95%), record intensity and quality; Carburizing reagent still (pressure 0.2Mpa, CO is put into again on the basis of guarantee 25% water ratio
2purity 99.5%, 20-30 DEG C) middle carbonization 2h, record intensity and quality; Finally putting into water again carries out second time maintenance (temperature 10-30 DEG C), and curing time is 24h, record intensity and quality.Obtain desulfurized powder flyash and steel slag building material made T-3.
Embodiment 4
By 16.0g desulfurized powder coal ash (circulating fluidized bed desulfur flyash, Dalian enterprise produce), 4.0g slag fine powder (150 ~ 300um, the massfraction of calcium oxide is 35 ~ 40%, Dalian enterprise produces) mix, add 5.0 grams of water and make 2cm × 2cm × 2cm test block, put into maintaining box and carry out first time maintenance (curing condition: temperature is 20-30 DEG C, humidity is 90-95%), record intensity and quality; Carburizing reagent still (pressure 0.2Mpa, CO is put into again on the basis of guarantee 25% water ratio
2purity 99.5%, 20-30 DEG C) middle carbonization 2h, record intensity and quality; Finally putting into water again carries out second time maintenance (temperature 10-30 DEG C), and curing time is 24h, record intensity and quality.Obtain desulfurized powder flyash and steel slag building material made T-4.
Embodiment 5
By 4.0g desulfurized powder coal ash (circulating fluidized bed desulfur flyash, Dalian enterprise produce), 16.0g slag fine powder (150 ~ 300um, the massfraction of calcium oxide is 35 ~ 40%, Dalian enterprise produces) mix, add 4.0 grams of water and make 2cm × 2cm × 2cm test block, put into maintaining box and carry out first time maintenance (curing condition: temperature is 20-30 DEG C, humidity is 90-95%), record intensity and quality; Carburizing reagent still (pressure 0.2Mpa, CO is put into again on the basis of guarantee 25% water ratio
2purity 99.5%, 20-30 DEG C) middle carbonization 2h, record intensity and quality; Finally putting into water again carries out second time maintenance (temperature 10-30 DEG C), and curing time is 24h, record intensity and quality.Obtain desulfurized powder flyash and steel slag building material made T-5.
Embodiment 6
By 4.0g desulfurized powder coal ash (circulating fluidized bed desulfur flyash, Dalian enterprise produce), 16.0g slag fine powder (150 ~ 300um, the massfraction of calcium oxide is 35 ~ 40%, Dalian enterprise produces) mix, add 6.0 grams of water and make 2cm × 2cm × 2cm test block, put into maintaining box and carry out first time maintenance (curing condition: temperature is 20-30 DEG C, humidity is 90-95%), record intensity and quality; Carburizing reagent still (pressure 0.2Mpa, CO is put into again on the basis of guarantee 25% water ratio
2purity 99.5%, 20-30 DEG C) middle carbonization 2h, record intensity and quality; Finally putting into water again carries out second time maintenance (temperature 10-30 DEG C), and curing time is 24h, record intensity and quality.Obtain desulfurized powder flyash and steel slag building material made T-6.
Desulfurized powder flyash and steel slag building material made prepared by above 4 examples contrasts as following table with domestic and international product respectively:
Table 1 contrast experiment
As can be seen from Table 1, example 1 of the present invention and example 2 have that ultimate compression strength is high, environmental protection and waste utilization, good security, production efficiency advantages of higher, and effect is suitable with like product effect, excellent combination property.Utilize the maintenance of second time aquation, can further improve the ultimate compression strength of desulfurized powder flyash and steel slag building material made.
Claims (7)
1. a preparation method for desulfurized powder flyash and steel slag building material made, is characterized in that, be the desulfurized powder coal ash of 1:0.25 ~ 4, the mixing of slag fine powder by mass ratio, add water, the add-on of described water accounts for the 20%-30% of desulfurized powder coal ash and slag fine powder total mass; Make test block, carry out first time aquation maintenance successively, carbonized maintaining, for the second time aquation maintenance, drying obtain desulfurized powder flyash and steel slag building material made.
2. the preparation method of a kind of desulfurized powder flyash and steel slag building material made according to claim 1, is characterized in that: described desulfurized powder coal ash is at least one of circulating fluidized bed desulfur flyash and wet process of FGD flyash.
3. the preparation method of a kind of desulfurized powder flyash and steel slag building material made according to claim 1, is characterized in that: the particle diameter of described slag fine powder is 150 ~ 300um.
4. the preparation method of a kind of desulfurized powder flyash and steel slag building material made according to claim 1 or 3, is characterized in that: in described slag fine powder, the massfraction of calcium oxide is 35 ~ 40%.
5. the preparation method of a kind of desulfurized powder flyash and steel slag building material made according to claim 1, is characterized in that: the purity 99.5% of described carbonized maintaining carbon dioxide in process.
6. the preparation method of a kind of desulfurized powder flyash and steel slag building material made according to claim 1, is characterized in that: the condition of second time aquation maintenance is: hydration temperature is 10-30
0c.
7. according to a desulfurized powder flyash and steel slag building material made prepared by the method according to any one of claim 1-6, it is characterized in that: wherein containing hydrated calcium silicate.
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Cited By (7)
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| CN107056202A (en) * | 2017-05-31 | 2017-08-18 | 盐城工学院 | Carbonization slag cement prepares accelerator and its application process of low-carbon binder materials |
| CN108327072A (en) * | 2018-01-24 | 2018-07-27 | 浙江大学 | A kind of building material production system strengthened based on carbon dioxide step mineralising |
| CN109608151A (en) * | 2019-01-21 | 2019-04-12 | 北京科技大学 | A method of high-strength carbonization building materials are prepared using slag micro powder |
| CN111410508A (en) * | 2020-04-24 | 2020-07-14 | 西交利物浦大学 | Preparation method and application of building product based on power plant solid waste and carbon dioxide |
| CN113955999A (en) * | 2021-11-30 | 2022-01-21 | 山东汉博昱洲新材料有限公司 | Retro brick prepared based on steel slag carbonization and preparation method thereof |
| CN114195430A (en) * | 2021-12-15 | 2022-03-18 | 北京科技大学 | Method for improving carbonization rate and performance of steel slag sample |
| CN114684839A (en) * | 2022-03-07 | 2022-07-01 | 南京工程学院 | Method for grading, mineralizing and carbon-fixing industrial by-product gypsum and gradient utilization of products |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107056202A (en) * | 2017-05-31 | 2017-08-18 | 盐城工学院 | Carbonization slag cement prepares accelerator and its application process of low-carbon binder materials |
| CN107056202B (en) * | 2017-05-31 | 2019-11-08 | 盐城工学院 | Carbonization slag cement prepares the promotor and its application method of low-carbon cementitious material |
| CN108327072A (en) * | 2018-01-24 | 2018-07-27 | 浙江大学 | A kind of building material production system strengthened based on carbon dioxide step mineralising |
| CN108327072B (en) * | 2018-01-24 | 2019-04-02 | 浙江大学 | A kind of building material production system strengthened based on carbon dioxide step mineralising |
| CN109608151A (en) * | 2019-01-21 | 2019-04-12 | 北京科技大学 | A method of high-strength carbonization building materials are prepared using slag micro powder |
| CN111410508A (en) * | 2020-04-24 | 2020-07-14 | 西交利物浦大学 | Preparation method and application of building product based on power plant solid waste and carbon dioxide |
| CN113955999A (en) * | 2021-11-30 | 2022-01-21 | 山东汉博昱洲新材料有限公司 | Retro brick prepared based on steel slag carbonization and preparation method thereof |
| CN114195430A (en) * | 2021-12-15 | 2022-03-18 | 北京科技大学 | Method for improving carbonization rate and performance of steel slag sample |
| CN114684839A (en) * | 2022-03-07 | 2022-07-01 | 南京工程学院 | Method for grading, mineralizing and carbon-fixing industrial by-product gypsum and gradient utilization of products |
| CN114684839B (en) * | 2022-03-07 | 2024-03-22 | 南京工程学院 | Hierarchical mineralization carbon fixation and product cascade utilization method for industrial byproduct gypsum |
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| CN105130300B (en) | 2018-05-18 |
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