CN101244582A - Novel technique for producing autoclaved air entrainment building block - Google Patents
Novel technique for producing autoclaved air entrainment building block Download PDFInfo
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- CN101244582A CN101244582A CNA2008100305165A CN200810030516A CN101244582A CN 101244582 A CN101244582 A CN 101244582A CN A2008100305165 A CNA2008100305165 A CN A2008100305165A CN 200810030516 A CN200810030516 A CN 200810030516A CN 101244582 A CN101244582 A CN 101244582A
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- building block
- autoclaved aerated
- aerated building
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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
- C04B28/02—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 hydraulic cements other than calcium sulfates
- C04B28/10—Lime cements or magnesium oxide cements
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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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- 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)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to a new craft and a method for preparing autoclave aerated blocks. Materials are fly ash, carbide mud residue and hydrazine hydrate salt residue; sodium chloride (or the hydrazine hydrate salt residue) or/ and nitro-organic compounds are added as admixture to fasten formation of green body early strength; traditional static stopping temperature is reduced to 45 to 65 degrees from 80 to 90 degrees, which is beneficial to realize displacement 60 to 90 percents lime by the carbide mud residue. The craft and the method have the advantages that automatic production of the autoclave aerated blocks is beneficially realized because CaO content of the autoclave aerated blocks is stable and impurity content such as calcium carbonate and unburned out hydrocarbon is less; quality of the autoclave aerated blocks is improved and production cost is reduced largely.
Description
Technical field
The present invention relates to a kind of preparation autoclaved aerated building block new technology and method thereof, belong to inorganic chemical industry or silicate building materials field.The present invention can fully utilize the industrial residue of steam power plant and polyvinyl chloride factory, hydrazine hydrate production on the one hand by this method, administers and pollutes, the protection environment; Can turn waste into wealth on the other hand, realize the resource circulation utilization, obtain huge economic benefit.
Technical background
Flyash-cement-lime air-entrained concrete building block is a kind of light wall material that utilizes the function admirable that industrial residue makes, and its light weight, good effect of heat insulation are the important a member in the air-entrained concrete building block family.Powder ash air-entrained concrete building block mainly is based on flyash, with cement and lime is adhesive, gypsum is a set retarder, aluminium powder is a blowing agent, through lightweight, the cellular New Building Materials that high temperature (180 ℃) high pressure (1.8 standard atmospheric pressures) maintenance formed in 8～12 hours, advantages such as having light weight, good heat insulation, can process and do not burn.Flyash is the industrial residue that discharge in the thermal power plant, and analysis and research show that it is a kind of pozzolana mixed material with certain activity, has the potential hydraulicity.As everyone knows, the production of adopting flyash to be used for air-entrained concrete building block as the silicon source relatively can be saved cement in large quantities with silicon resources such as adopting river sand, and along with people's demand growing to electric power, China's thermal power generation cause increases rapidly, meanwhile, its solid waste---flyash (slag) also increases sharply.Flyash is stored up with the ash field, gives it up contaminated environment, a large amount of occupation of land; The production of the required traditional building material of construction industry development need consume a large amount of natural resources, the energy, damages the soil, and contaminated environment wastes energy.Total utilization of PCA both can consume a large amount of flyash, alleviated its pollution to environment, reduce to take up an area of, and can be the building material that building industry is produced lightweight, high-strength, insulation again, replaced clay brick, was the developing direction that air-entrained concrete building block is produced.
Need a large amount of quick lime in the fly ash aerated block material production, the function that it rose is the pH value of regulating aerated-block cast slip, satisfies aluminium powder or aluminium cream and reactant aqueous solution and produces hydrogen and aerating; Simultaneously with slurry in the water reaction, produce a large amount of heats and consume moisture, accelerate hot quiet parking precuring speed; It is as the calcium source, and supplement calcium improves the silico-calcium ratio in the fly ash aerated building block.The production of quick lime will consume a large amount of coal resources and land resource, produces a large amount of waste gas; Quick lime be used for fly ash aerated block material production need the dry grinding, produce a large amount of dust and need to consume a large amount of electric power resources, owing to the unstability of quick lime production causes wherein containing a large amount of insufficiently burnt lime stones, bring for the technology controlling and process of fly ash aerated block material production and product quality and seriously influence.Carbide slag is the accessory substance of Production of PVC, and wherein contained main chemical compositions is that calcium hydroxide is white lime, also contains aluminium oxide, silica and a spot of unburnt carbon granules; The spar ash that does not contain impurity such as unburnt carbon granules that the refining lime of carbide slag obtains by the fine finishining to carbide slag.Calcium hydroxide stable content in the carbide slag, carbide slag substitutes or most of quick lime that substitutes is used for fly ash aerated building block production, can realize the process of aluminium powder aerating, the more important thing is and to bring more effective calcium resource, be of value to the operability and the product quality of the technology controlling and process that improves fly ash aerated block material production.By adding additive, research to the quiet parking precuring of heat technology, steam curing process and adjusting material composition, can obtain the fly ash aerated aerated-block of rational precuring speed and better quality, the most reasonable, advanced secondary resource utilization that the production air-entrained concrete building block of flyash-Si resource and the combination of carbide slag calcium resource has been represented.
The carbide slag that does not contain or contain impurity such as a small amount of calcium carbonate, unburnt carbon granules that refining carbide slag obtains by the fine finishining to carbide slag.Chinese patent publication number CN195483A has related to the method for utilizing chemical clay-slag to prepare steam-pressing aero-concrete, and wherein used calcium carbide clay-slag not explanation is the refining carbide slag that is adopted in this invention; Chinese patent publication number CN 195483A makes siliceous mixed slurry with chemical clay-slag with siliceous raw material mixing wet-milling, in the wet-milling process, in the siliceous material contained silica can with contained calcium hydroxide generation hydration reaction in the chemical clay-slag, be unfavorable for preparing autoclaved aerated building block material production follow-up carry out add solid/liquid/gas reactions; Adding magnesium chloride, calcium chloride or sodium sulphate among the Chinese patent publication number CN 195483A is additive, cost is higher, and substitute quick lime with can only realizing using more a spot of chemical clay-slag, also not relating to and utilizing sodium chloride (hydration hydrazonium salt slag) and/or itrogenous organic substance is additive.
The present invention relates to a kind of preparation autoclaved aerated building block new technology and method thereof, wherein will contain siliceous material flyash (or river sand, or flyash and river sand mixture) mix with water and to carry out wet-milling or to mix obtaining siliceous slip, in above-mentioned slip, add carbide slag, stir after 2.0-4.0 hour under the room temperature, be heated to 40.0-48.0 ℃, add cement again, sodium chloride (or hydration hydrazonium salt slag), itrogenous organic substance, quick lime, stirred 1-2 minute, add aluminium cream (or aluminium powder) or water and aluminium cream (or aluminium powder) mixture then, stir 30.0-50.0 second, become autoclaved aerated building block cast slip, get angry, quiet stopping, cutting, and steam molded.
Summary of the invention
Order of the present invention relates to a kind of preparation autoclaved aerated building block new technology and method thereof.Order of the present invention provides a kind of hydration hydrazonium salt slag, carbide slag to be used to prepare the method and the technology of autoclaved aerated building block material, and its operating process as shown in Figure 1.
1, the preparation of siliceous slurry: siliceous raw material flyash (or river sand, or flyash and river sand mixture) is carried out wet-milling, or stir and make 95.0% fineness greater than 180 purpose slurries, the solid mass ratio of water adopts 0.8-1.2: 1.0; Adding percentage by weight in this slurry is the carbide slag of 12-25%; Stir after 2.0-4.0 hour, be heated to 40.0-48.0 ℃
2, the preparation of siliceous mixed slurry: adopt water leg to keep slurry temperature in above-mentioned siliceous slurry and be 40.0-48.0 ℃, add cement, sodium chloride (or hydration hydrazonium salt slag), itrogenous organic substance, quick lime, mixed 1-2 minute; The percentage by weight that each material divides in the siliceous mixed slurry is---siliceous raw material 65.0-80.0: carbide slag 12.0-25.0: quick lime 5.0-12.0: cement 5.0-15.0: sodium chloride (hydration hydrazonium salt slag) 0.5-3.0: and itrogenous organic substance 0.00-0.08, and wherein water stereoplasm amount percentage is 0.8-1.2: 1.0.
3, the adding of aluminium cream (or aluminium powder) (or water and aluminium cream (or aluminium powder) mixture): add aluminium cream (or aluminium powder) (or water and aluminium cream (or aluminium powder) mixture), wherein aluminium cream (or aluminium powder) is aluminium cream (or aluminium powder) with the percentage by weight of above-mentioned siliceous mixed slurry: siliceous mixed slurry (butt) is 0.07-0.1, mix, mixing speed is 300-400 rev/min, mixing time is 30.0-50.0 second, and discharging enters mould and pours into a mould;
4, the mould of finishing cast enters hot quiet parking precuring, and 45.0-65.0 ℃ of quiet parking precuring temperature is 2.5 hours between the quiet stopping time, reach cutting intensity after, cut, enter afterwards and quietly before the still stop the chamber maintenance.
5, the base substrate after will cutting is drawn in and is carried out steam press maintenance in the still, steam pressure 1.2MPa, and about 192 ℃ of temperature, the steam-cured time of constant voltage was greater than 10.0 hours.
According to the above, utilization of the present invention is used to prepare autoclaved aerated building block material and method thereof with a kind of flyash, carbide slag, hydration hydrazonium salt slag; In the slurry of preparation autoclaved aerated building block material, the mass percent of each material is a siliceous raw material: carbide slag: quick lime: cement: sodium chloride (hydration hydrazonium salt slag): itrogenous organic substance: the mass percent of aluminium cream or aluminium powder is 65.0-80.0: 12.0-25.0: 5.0-12.0: 8.0-15.0: 0.5-3.0: 0.00-0.08: 0.07-0.1, and wherein water stereoplasm amount percentage is 0.8-1.2: 1.0.
According to the above, the refining carbide slag of utilization of the present invention is by obtaining the accessory substance carbide slag of Production of PVC is refining, reduced wherein impurity content such as calcium carbonate, unburned carbon, has also reduced their adverse effects to the aerated building block material quality; The siliceous raw material that the present invention utilizes for flyash (or river sand, or flyash and river sand mixture, the additive of the present invention's utilization is sodium chloride and itrogenous organic substance, wherein sodium chloride can be hydration hydrazonium salt slag.
The present invention compares with prior art and disclosed relevant patented technology, and it has very big technological merit:
(1) adopts refining carbide slag can reduce that impurity such as calcium carbonate, unburned carbon helps realizing the automated production of autoclaved aerated building block to the adverse effect of aerated building block material quality in the carbide slag, improve the aerated building block material quality;
(2) adopt sodium chloride (or hydration hydrazonium salt slag) and itrogenous organic substance to be used to produce the formation that autoclaved aerated building block can be accelerated the base substrate early strength, make the quiet temperature of stopping be reduced to 45-65 ℃ by 80-90 ℃, remedied the deficiency that carbide slag can not heat production, the production technology that the quick lime of realization replacing carbide slag 60-90% is used to produce aerated building block material has reduced production cost widely;
(3) adopting flyash, carbide slag and hydration hydrazonium salt slag to be used to produce autoclaved aerated building block can further reduce production costs, and has fully utilized industrial residue;
(4) aerated building block material that adopts technology provided by the invention to produce has environmental protection, light weight, intensity height, energy-conservation characteristics, and the aerated building block material that alternative prior art is produced is used for body of wall filling and the roof insulation and the heat insulating work of frame structure.
Description of drawings:
Fig. 1 is technological process of production figure of the present invention.
Specific embodiments
In conjunction with flow chart, the present invention is a kind of preparation autoclaved aerated building block new technology and method thereof, carries out production operation by following processing step:
1, material selection: refining carbide slag is that carbide slag moisture content mass percent is 30.0%, and the calcium hydroxide mass percentage content is 66.0%, and the calcium oxide mass percentage content in the quick lime is 65.0%; The mass percentage content of the silica in the flyash is 61.0%, and the mass percentage content of aluminium oxide is 27.5%, and the calcium oxide mass percentage content is 4.5%, and the iron oxide mass percentage content is 3.0%; Sodium chloride content is 90% (hydration hydrazonium salt slag, wherein sodium chloride is 90%), itrogenous organic substance (as triethanolamine content greater than 95%), Portland cement.
2, with flyash and water flyash by mass percentage: water is to add at 57: 43 to carry out wet-milling in the ball mill or mix, the control grain fineness, particle more than 90% is crossed 180 orders, adding and flyash percentage by weight are 18% carbide slag, under the room temperature, under 150 rev/mins, stirred 2.0 hours, it is standby to be prepared into siliceous slurry;
3, get 2900.0 kilograms of siliceous slurries, and slip be heated to 47 ℃, add 110.0 kilograms of cement, 15.0 kilograms of hydration hydrazonium salt slags, 0.8 kilogram of triethanolamine, 120 kg quick lime then, mix 1.0 minutes after, obtain siliceous mixed slurry;
4, in above-mentioned slurry, add 16.5 kilograms of aluminium powder-water mixing suspensions (wherein containing 1.20 kilograms of aluminium powders), dispersed with stirring 42 seconds; Discharging enters mould and pours into a mould;
5, become the mould of cast to enter hot quiet parking precuring, 55 ℃ of quiet parking precuring temperature are 2.5 hours between the quiet stopping time, reach cutting intensity after, cut, enter afterwards and quietly before the still stop the chamber maintenance.
6, the base substrate behind the well cutting is drawn in carried out steam press maintenance in the still, steam pressure 1.2MPa, temperature is about 192 ℃, the steam-cured time of constant voltage was greater than 10.0 hours.Adopt the mechanical property of the autoclaved aerated building block of said method production to see Table 1
Table 1: the mechanical property and the GB control value of the autoclaved aerated building block that the present invention produces
| Dry density (kilograms per cubic meter) | 315 | 408 | 520 | 607 | 715 | 800 |
| Index intensity level of the present invention (megapascal (MPa)) | 2.5 | 3.3 | 4.5 | 5.5 | 7.5 | 10.5 |
| National standard intensity level (megapascal (MPa)) | 1.0 | 2.0 | 2.5-3.5 | 3.5-5.0 | 5.0-7.5 | 7.5-10.0 |
Claims (9)
- A kind of preparation autoclaved aerated building block new technology and method thereof1, a kind of preparation autoclaved aerated building block new technology and method thereof, it is characterized in that to contain siliceous material flyash (or river sand, or flyash and river sand mixture) 45.0-60.0% mixes with water 40.0-55.0% and carries out wet-milling or stirring obtains siliceous slip, by weight percentage, in above-mentioned slip, add refining carbide slag 12-25%, stir after 2-4 hour, be heated to 40.0-48.0 ℃; Under this temperature, add sodium chloride (or hydration hydrazonium salt slag) 1.0-3.0% by weight percentage then, itrogenous organic substance such as triethanolamine 0.00-0.08%, cement 8.0-15.0%, quick lime 5-12% stirred 1.0-2.0 minute, made siliceous mixed slurry; Add aluminium cream (or aluminium powder) 0.07-0.1% or water and aluminium cream (or aluminium powder) mixture then, stir 30.0-50.0 second, become autoclaved aerated building block cast slip, get angry, quietly stop, cut, and steam molded.
- 2, according to described a kind of preparation autoclaved aerated building block new technology of claim 1 and method thereof, it is characterized in that its refining carbide slag is---carbide slag is removed out impurity such as calcium carbonate, do not fire clean carbon or the later refined lime mud of iron oxide, wherein moisture is less than 30%, and calcium hydroxide content is greater than 65%.
- 3, according to described a kind of preparation autoclaved aerated building block new technology of claim 1 and method thereof, the weight ratio that it is characterized in that each component in its autoclaved aerated building block cast slip is---siliceous raw material: refining carbide slag: quick lime: cement: sodium chloride (hydration hydrazonium salt slag): itrogenous organic substance: the mass percent of aluminium cream or aluminium powder is 65.0-80.0: 12.0-25.0: 5.0-12.0: 8.0-15.0: 0.5-3.0: 0.00-0.08: 0.07-0.1, and wherein water stereoplasm amount percentage is 0.8-1.2: 1.0.
- 4, according to described a kind of preparation autoclaved aerated building block new technology of claim 1 and method thereof, it is characterized in that its carbide slag is---join and siliceous material is carried out wet-milling or mix in the siliceous slip of processing, mixing speed is 120-180 rev/min, mixing time is 2.0-4.0 hour, and temperature is a room temperature.
- 5, according to described a kind of preparation autoclaved aerated building block new technology of claim 1 and method thereof, it is characterized in that adding sodium chloride (or hydration hydrazonium salt slag) and/or itrogenous organic substance (as triethanolamine), can make carbide slag substitute 60-90% quick lime.
- 6,, it is characterized in that employed hydration hydrazonium salt slag is the waste residue during hydrazine hydrate is produced according to described a kind of preparation autoclaved aerated building block new technology of claim 1 and method thereof.
- 7, according to described a kind of preparation autoclaved aerated building block new technology of claim 1 and method thereof, it is characterized in that adding aluminium cream or aluminium powder mass fraction is 0.07-0.1%, mixing speed is that 300-400 rev/min of mixing time is 30.0-50.0 second, and the stirring reaction temperature is 40.0-48.0 ℃.
- 8,, it is characterized in that its foaming agent is aluminium cream (or aluminium powder) or water and aluminium cream (or aluminium powder) mixture according to claim 1 and 7 described a kind of preparation autoclaved aerated building block new technology and methods thereof; Wherein water and aluminium cream (or aluminium powder) mixture are meant by 94.0-89.0% water and 6.0-11.0% aluminium cream (or aluminium powder) and mix.
- 9, according to described a kind of preparation autoclaved aerated building block new technology of claim 1 and method thereof, it is characterized in that the mould of finishing cast enters hot quiet parking precuring, 45.0-65.0 ℃ of quiet parking precuring temperature, be 2.5 hours between the quiet stopping time, after reaching cutting intensity, cut, enter the preceding quiet chamber maintenance that stops of still afterwards.
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| CNA2008100305165A CN101244582A (en) | 2008-01-21 | 2008-01-21 | Novel technique for producing autoclaved air entrainment building block |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103213195A (en) * | 2013-04-28 | 2013-07-24 | 泉州市丰泽福帆机械有限公司 | Production system of foaming bricks |
| CN104402507A (en) * | 2014-11-12 | 2015-03-11 | 安徽中龙建材科技有限公司 | Anti-compression shockproof aerated concrete building block and preparation method thereof |
| CN104817341A (en) * | 2015-05-25 | 2015-08-05 | 吴江华诚复合材料科技有限公司 | High-strength lightweight building material and preparation method thereof |
| CN108383469A (en) * | 2018-02-10 | 2018-08-10 | 雷春生 | A kind of preparation method of Anti-pressure no-baking carbide residue brick |
| CN113149584A (en) * | 2021-01-25 | 2021-07-23 | 南京清科中晟环境技术有限公司 | Method for preparing autoclaved aerated concrete by using household garbage incinerator slag and carbide slag |
-
2008
- 2008-01-21 CN CNA2008100305165A patent/CN101244582A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103213195A (en) * | 2013-04-28 | 2013-07-24 | 泉州市丰泽福帆机械有限公司 | Production system of foaming bricks |
| CN103213195B (en) * | 2013-04-28 | 2015-04-29 | 泉州市丰泽福帆机械有限公司 | Production system of foaming bricks |
| CN104402507A (en) * | 2014-11-12 | 2015-03-11 | 安徽中龙建材科技有限公司 | Anti-compression shockproof aerated concrete building block and preparation method thereof |
| CN104402507B (en) * | 2014-11-12 | 2016-09-14 | 安徽中龙建材科技有限公司 | Shockproof air-entrained concrete building block of resistance to compression and preparation method thereof |
| CN104817341A (en) * | 2015-05-25 | 2015-08-05 | 吴江华诚复合材料科技有限公司 | High-strength lightweight building material and preparation method thereof |
| CN108383469A (en) * | 2018-02-10 | 2018-08-10 | 雷春生 | A kind of preparation method of Anti-pressure no-baking carbide residue brick |
| CN113149584A (en) * | 2021-01-25 | 2021-07-23 | 南京清科中晟环境技术有限公司 | Method for preparing autoclaved aerated concrete by using household garbage incinerator slag and carbide slag |
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Application publication date: 20080820 |