CN101805162A - Non-fired and non-steamed fly ash brick produced by using CFBC desulphurization residues and preparation process thereof - Google Patents
Non-fired and non-steamed fly ash brick produced by using CFBC desulphurization residues and preparation process thereof Download PDFInfo
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- CN101805162A CN101805162A CN201019026097A CN201019026097A CN101805162A CN 101805162 A CN101805162 A CN 101805162A CN 201019026097 A CN201019026097 A CN 201019026097A CN 201019026097 A CN201019026097 A CN 201019026097A CN 101805162 A CN101805162 A CN 101805162A
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- cfbc
- fly ash
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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
Abstract
The invention discloses a non-fired and non-steamed fly ash brick produced by using CFBC desulphurization residues and a production process thereof. A production raw material of the brick comprises the following components in proportion by weight: 50 to 70 percent of the CFBC desulphurization residues, 10 to 25 percent of furnace bottom slag, 4 to 8 percent of cement, 10 to 14 percent of quicklime and 3 to 6 percent of gypsum. The production process comprises the following steps of: mixing the components together and then stirring the mixture uniformly; adding water which is 12 to 18 percent of the mass of the mixture into the mixture; and performing press forming on the mixture by adopting a pressure of 16 to 22 MPa, and then performing curing to obtain the fly ash brick. The non-fired and non-steamed fly ash brick has a high mixed content of the CFBC desulphurization residues, not only can solve the problems of low utilization ratio of the CFBC desulphurization residues and resource wastes, but also can provide a novel production process of the non-fired and non-steamed fly ash brick; besides, the non-fired and non-steamed fly ash brick has the advantages of simple production process, low cost, convenient popularization and application, and great economic benefits, social benefits and environmental benefits.
Description
One, technical field
The invention belongs to building material technical field, free of calcining and steam curing flyash brick and preparation technology thereof that particularly a kind of desulphurize fly ash of utilizing circular fluid bed (CirculatingFluidized Bed Combustion is called for short CFBC) to be discharged is produced.
Two, background technology
The CFBC combustion technology is a kind of clean burning technology that grows up the eighties in 20th century.This technology has following several characteristics: at first have the good advantage of fuel tolerance, it can burning low grade coal, as coal gangue, and can burn domestic refuse and multiple trade waste etc.; The temperature of combustion lower (800 ℃～900 ℃) of next CFBC, the NOx of its combustion processes discharging is also lower, is a kind of relatively combustion system of environmental protection; This combustion technology has also that technology is simple, floor space is little in addition, and load regulation range is big, efficiency of combustion height, and can add Wingdale in boiler and carry out desulfuration in furnace, plurality of advantages such as realize that burning and desulfurization are carried out simultaneously.This combustion technology has more application at present at home, also is a kind of clean burning technology that China widelys popularize.
The CFBC desulphurize fly ash is the desulphurize fly ash that circular fluid bed is discharged after the in-furnace calcium spraying desulfurization.Because the temperature of combustion of circular fluid bed has only 800 ℃～900 ℃, far below 1400 ℃～1700 ℃ of common coal-powder boiler, thereby in the CFBC desulphurize fly ash, can not form liquid phase, almost can't see the spheric particle therein.Also there is notable difference in the chemical ingredients of CFBC desulphurize fly ash with the flyash that common coal-powder boiler discharges.Contain a large amount of free calcium oxide (f-CaO) and sulphur trioxide (SO in the CFBC desulphurize fly ash
3), the f-CaO in the CFBC desulphurize fly ash generally is desulfurized product C aSO
4Wrap up, hydration rate is slower, SO3 in the CFBC desulphurize fly ash can generate the bigger ettringite of volumetric expansion again in addition, the two is to cause to mix the principal element that CFBC desulphurize fly ash small product size expands, stability is bad, finally cause product strength to reduce, this also is the lower one of the main reasons of CFBC desulphurize fly ash utilization ratio, will note wherein f-CaO and SO when therefore using the CFBC desulphurize fly ash
3The control of amount.
The domestic and international relevant report of the comprehensive utilization mode that has significant practical applications of at present relevant CFBC desulphurize fly ash all seldom, the report relevant with brick production mainly contains: first kind is utilized direction is that the someone has proposed a kind of production imagination, the CFBC desulphurize fly ash is replaced river sand (Lu Xingtian as fine aggregate, cold Zhen Gao. the circular fluid bed total utilization of PCA. the special equipment safety technique, 2005, (3): 15-16; Cold Zhen Gao. the comprehensive utilization of power station, inland river circulating fluid bed boiler desulfurization ash. total utilization of PCA, 2006, (1): 53-54), but all do not propose proportioning, production method in these two documents, also formally do not put into production; Second kind is utilized direction is to utilize the CFBC desulphurize fly ash to produce autoclaved brick (Li Shengyu, Yang Qingliang, Huang Shiyun. circulating fluid bed coal ash autoclaved brick process study. walling innovation and building energy conservation, 2007, (12): 19-20), the autoclaved brick intensity of utilizing this method to produce is higher, but production process needs steam press maintenance, expends a large amount of energy; The third utilizes direction is to utilize the CFBC desulphurize fly ash to produce vitrified brick (Yan Weiyong, Gao Tingyuan, Xiong Rensen, the research of circulating fluid bed boiler desulfurization ash comprehensive utilization, clean coal technology, 2000, (1): 31-34; Yue Huanling, former great waves forever, Zhu Hongfeng. the circular fluid bed ash comprehensive utilization. boiler technology, 2006, (supplementary issue): 36-41), the problem that this kind method exists is that the desulfurization product calcium sulfate that the CFBC desulphurize fly ash contains can decompose in calcination process once more, causes the secondary pollution of sulfurous gas.In sum, just existing document record finds no and utilizes the CFBC desulphurize fly ash to produce the non-burning brick proportioning and the record of production technique.
Three, summary of the invention
Goal of the invention: it is lower to the present invention is directed to CFBC desulphurize fly ash utilization ratio, and adopt again calcining process to produce vitrified brick and may cause sulfurous gas pollution problems once more, perhaps adopt and steam compression technology production autoclaved brick and need consume a large amount of energy again, and a kind of free of calcining and steam curing flyash brick and the preparation technology thereof who directly utilizes the CFBC desulphurize fly ash to produce who provides.
Technical scheme: a kind of free of calcining and steam curing flyash brick that utilizes the CFBC desulphurize fly ash to produce, the weight ratio of raw materials for production component is: CFBC desulphurize fly ash 50%-70%, furnace bottom slag 10%-25%, cement 4%-8%, unslaked lime 10%-14%, gypsum 3%-6%.
The free of calcining and steam curing flyash brick that utilizes the CFBC desulphurize fly ash to produce, the weight ratio of raw materials for production component is: CFBC desulphurize fly ash 57%, furnace bottom slag 20%, cement 8%, unslaked lime 12%, gypsum 3%.
Preparation utilizes the technology of the free of calcining and steam curing flyash brick of CFBC desulphurize fly ash production, after each component is mixed, stirs, and adds the water of blending ingredients quality 12%-18%, and the pressure compression moulding of adopting 16-22MPa is after maintenance gets flyash brick.
Preparation utilizes the technology of the free of calcining and steam curing flyash brick of CFBC desulphurize fly ash production, after each component is mixed, stirs, and adds the water of blending ingredients quality 15%, adopts the pressure compression moulding of 20MPa.
Beneficial effect: non-fired and non-steamed bricks CFBC desulphurize fly ash volume height provided by the present invention, it is low not only can to solve CFBC desulphurize fly ash utilization ratio, and the problem of the wasting of resources can also provide a kind of new free of calcining and steam curing flyash brick production technique simultaneously; Non-fired and non-steamed bricks production technique of the present invention in addition is simple, cost is lower, is convenient to promote the use of, and huge economic benefit, social benefit and environmental benefit are arranged.
Four, embodiment
The invention will be further described below in conjunction with example, and following per-cent implication is mass ratio:
Embodiment 1:
Component and ratio: CFBC desulphurize fly ash 54%, furnace bottom slag 25%, cement 6%, unslaked lime 10%, gypsum 5%.
Technology: will add water 13% (mass ratio) after the mixing of components such as CFBC desulphurize fly ash, furnace bottom slag, cement, lime, gypsum, stir and made it even in 2 minutes, adopt then to be put into maintaining box after the pressure compression moulding of 18MPa and to carry out maintenance 28 days, the MU15 flyash brick.
Effect: apparent size and deviation satisfy the requirement of premium grads (A), and test block does not have obvious aberration, and other performance index see Table 1.
Embodiment 2:
Component and ratio: CFBC desulphurize fly ash 57%, furnace bottom slag 20%, cement 8%, unslaked lime 12%, gypsum 3%.
Technology: will add water 15% (mass ratio) after the mixing of components such as CFBC desulphurize fly ash, furnace bottom slag, cement, lime, gypsum, stir and made it even in 2 minutes, adopt then to be put into maintaining box after the pressure compression moulding of 20MPa and to carry out maintenance 28 days, the MU20 flyash brick.
Effect: apparent size and deviation satisfy the requirement of premium grads (A), and test block does not have obvious aberration, and other performance index see Table 1.
Embodiment 3:
Component and ratio: CFBC desulphurize fly ash 70%, furnace bottom slag 10%, cement 6%, unslaked lime 10%, gypsum 4%.
Technology: will add water 18% (mass ratio) after the mixing of components such as CFBC desulphurize fly ash, furnace bottom slag, cement clinker, lime, gypsum, stir and made it even in 2 minutes, adopt then to be put into maintaining box after the pressure compression moulding of 22MPa and to carry out maintenance 28 days, the MU20 flyash brick.
Effect: apparent size and deviation satisfy the requirement of premium grads (A), and test block does not have obvious aberration, and other performance index see Table 1.
Embodiment 4:
Component and ratio: CFBC desulphurize fly ash 50%, furnace bottom slag 25%, cement 6%, unslaked lime 14%, gypsum 5%.
Technology: will add water 12% (mass ratio) after the mixing of components such as CFBC desulphurize fly ash, furnace bottom slag, cement, lime, gypsum, stir and made it even in 2 minutes, adopt then to be put into maintaining box after the pressure compression moulding of 16MPa and to carry out maintenance 28 days, the MU15 flyash brick.
Effect: apparent size and deviation satisfy the requirement of premium grads (A), and test block does not have obvious aberration, and other performance index see Table 1.
Embodiment 5:
Component and ratio: CFBC desulphurize fly ash 62%, furnace bottom slag 15%, cement 8%, unslaked lime 10%, gypsum 5%.
Technology: will add water 15% (mass ratio) after the mixing of components such as CFBC desulphurize fly ash, furnace bottom slag, cement, lime, gypsum, stir and made it even in 2 minutes, adopt then to be put into maintaining box after the pressure compression moulding of 20MPa and to carry out maintenance 28 days, the MU20 flyash brick.
Effect: apparent size and deviation satisfy the requirement of premium grads (A), and test block does not have obvious aberration, and other performance index see Table 1.
Embodiment 6:
Component and ratio: CFBC desulphurize fly ash 63%, furnace bottom slag 15%, cement 6%, unslaked lime 12%, gypsum 4%.
Technology: will add water 16% (mass ratio) after the mixing of components such as CFBC desulphurize fly ash, furnace bottom slag, cement, lime, gypsum, stir and made it even in 2 minutes, adopt then to be put into maintaining box after the pressure compression moulding of 18MPa and to carry out maintenance 28 days, the MU15 flyash brick.
Effect: apparent size and deviation satisfy the requirement of premium grads (A), and test block does not have obvious aberration, and other performance index see Table 1.
Table 1 effect parameter
Claims (4)
1. a free of calcining and steam curing flyash brick that utilizes the CFBC desulphurize fly ash to produce is characterized in that the weight ratio of raw materials for production component is: CFBC desulphurize fly ash 50%-70%, furnace bottom slag 10%-25%, cement 4%-8%, unslaked lime 10%-14%, gypsum 3%-6%.
2. the free of calcining and steam curing flyash brick that utilizes the CFBC desulphurize fly ash to produce according to claim 1 is characterized in that the weight ratio of raw materials for production component is: CFBC desulphurize fly ash 57%, furnace bottom slag 20%, cement 8%, unslaked lime 12%, gypsum 3%.
3. technology for preparing the free of calcining and steam curing flyash brick that claim 1 or the 2 described CFBC of utilization desulphurize fly ash produce, it is characterized in that after each component mixing, stir, add the water of blending ingredients quality 12%-18%, the pressure compression moulding of adopting 16-22MPa is after maintenance gets flyash brick.
4. described preparation utilizes the technology of the free of calcining and steam curing flyash brick that the CFBC desulphurize fly ash produces according to claim 3, after it is characterized in that each component mixed, stirs, and adds the water of blending ingredients quality 15%, adopts the pressure compression moulding of 20MPa.
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| CN201019026097A CN101805162A (en) | 2010-02-04 | 2010-02-04 | Non-fired and non-steamed fly ash brick produced by using CFBC desulphurization residues and preparation process thereof |
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| CN201019026097A CN101805162A (en) | 2010-02-04 | 2010-02-04 | Non-fired and non-steamed fly ash brick produced by using CFBC desulphurization residues and preparation process thereof |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101973749A (en) * | 2010-10-18 | 2011-02-16 | 武汉凯迪电力股份有限公司 | Non-sintered brick based on flue gas desulfurization byproduct and preparation method thereof |
| CN102432265A (en) * | 2011-09-13 | 2012-05-02 | 安徽工业大学 | Preparation method of wall brick made of flue gas desulfurization slag |
| CN103951366A (en) * | 2014-04-17 | 2014-07-30 | 武汉钢铁(集团)公司 | Grass planting brick manufactured from sintered flue gas semi-dry desulfurization ash and manufacture method of brick |
| CN104418561A (en) * | 2013-08-28 | 2015-03-18 | 宝山钢铁股份有限公司 | Matrix material of baking-free bricks and preparation method of baking-free bricks |
| CN105016692A (en) * | 2015-07-07 | 2015-11-04 | 重庆大学 | Solid waste recycling process for preparing steam-cured bricks by using high calcium sulfite desulfurization ash |
| CN106242330A (en) * | 2016-08-03 | 2016-12-21 | 山西国峰煤电有限责任公司 | A kind of method in presetting period that extends recirculating fluidized bed flying dust in cement or concrete |
| CN111574146A (en) * | 2020-04-20 | 2020-08-25 | 浙江大学 | Method for preparing industrial solid waste base baking-free brick by combining composite cementing material with carbonation curing technology |
| CN114716173A (en) * | 2022-04-26 | 2022-07-08 | 武汉理工大学 | Circulating fluidized bed slag resource utilization method |
| CN114988779A (en) * | 2022-05-05 | 2022-09-02 | 克拉玛依市聚能资源综合利用有限责任公司 | Method for preparing baking-free building material by using circulating fluidized bed ash and slag as main raw materials |
-
2010
- 2010-02-04 CN CN201019026097A patent/CN101805162A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101973749A (en) * | 2010-10-18 | 2011-02-16 | 武汉凯迪电力股份有限公司 | Non-sintered brick based on flue gas desulfurization byproduct and preparation method thereof |
| CN102432265A (en) * | 2011-09-13 | 2012-05-02 | 安徽工业大学 | Preparation method of wall brick made of flue gas desulfurization slag |
| CN104418561A (en) * | 2013-08-28 | 2015-03-18 | 宝山钢铁股份有限公司 | Matrix material of baking-free bricks and preparation method of baking-free bricks |
| CN103951366A (en) * | 2014-04-17 | 2014-07-30 | 武汉钢铁(集团)公司 | Grass planting brick manufactured from sintered flue gas semi-dry desulfurization ash and manufacture method of brick |
| CN105016692A (en) * | 2015-07-07 | 2015-11-04 | 重庆大学 | Solid waste recycling process for preparing steam-cured bricks by using high calcium sulfite desulfurization ash |
| CN106242330A (en) * | 2016-08-03 | 2016-12-21 | 山西国峰煤电有限责任公司 | A kind of method in presetting period that extends recirculating fluidized bed flying dust in cement or concrete |
| CN111574146A (en) * | 2020-04-20 | 2020-08-25 | 浙江大学 | Method for preparing industrial solid waste base baking-free brick by combining composite cementing material with carbonation curing technology |
| CN111574146B (en) * | 2020-04-20 | 2021-08-24 | 浙江大学 | Method for preparing industrial solid waste base baking-free brick by combining composite cementing material with carbonation curing technology |
| CN114716173A (en) * | 2022-04-26 | 2022-07-08 | 武汉理工大学 | Circulating fluidized bed slag resource utilization method |
| CN114716173B (en) * | 2022-04-26 | 2023-08-15 | 武汉理工大学 | Resource utilization method for slag of circulating fluidized bed |
| CN114988779A (en) * | 2022-05-05 | 2022-09-02 | 克拉玛依市聚能资源综合利用有限责任公司 | Method for preparing baking-free building material by using circulating fluidized bed ash and slag as main raw materials |
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Application publication date: 20100818 |