Novel aerated block brick and preparation method thereof
阅读说明：本技术 一种新型加气块砖及其制备方法 (Novel aerated block brick and preparation method thereof ) 是由 王荣 于 2021-08-16 设计创作，主要内容包括：本发明涉及加气块砖制备技术领域,公开了一种新型加气块砖及其制备方法。该新型加气块砖的原料包括第一干料、第二干料和水,其中,所述第一干料包括粉煤灰、脱硫石膏和芒硝,所述第二干料包括生石灰、电石渣、铝粉和高炉矿粉,所述水与所述第一干料的重量比为2.3-4.3:2,所述粉煤灰、所述脱硫石膏、所述芒硝、所述生石灰、所述电石渣、所述铝粉和所述高炉本发明制备的加气块砖强度完全符合国标,进行批量生产不仅可以节约大量的生产成本,而且可以消耗大量的固废,实现资源化生产。(The invention relates to the technical field of aerated block brick preparation, and discloses a novel aerated block brick and a preparation method thereof. The novel air-entrapping block brick comprises raw materials including a first dry material, a second dry material and water, wherein the first dry material comprises fly ash, desulfurized gypsum and mirabilite, the second dry material comprises quick lime, carbide slag, aluminum powder and blast furnace mineral powder, the weight ratio of the water to the first dry material is 2.3-4.3:2, the strength of the fly ash, the desulfurized gypsum, the mirabilite, the quick lime, the carbide slag, the aluminum powder and the air-entrapping block brick prepared by the blast furnace completely meets the national standard, and mass production can be carried out, so that not only can a large amount of production cost be saved, but also a large amount of solid waste can be consumed, and resource production can be realized.)
1. A novel air-added block brick is characterized in that raw materials of the novel air-added block brick comprise a first dry material, a second dry material and water, wherein the first dry material comprises fly ash, desulfurization gypsum and mirabilite, the second dry material comprises quick lime, carbide slag, aluminum powder and blast furnace mineral powder, the weight ratio of the water to the first dry material is 2.3-4.3:2, and the weight ratio of the fly ash, the desulfurization gypsum, the mirabilite, the quick lime, the carbide slag, the aluminum powder and the blast furnace mineral powder is 386-type 396:120-130:14-19:162: 100-type 120:1.3-1.8: 131-type 138;
the fly ash contains 8.95 to 52.38 weight percent of SiO24.68-15.35% by weight of Al2O31.02-2.63% by weight FeO and 1.65-4.52% by weight Fe2O3；
The blast furnace ore powder contains 38.84-41.23 wt% of CaO and 33.52-35.84 wt% of SiO212.62 to 16.24 weight percent of Al2O30.16-0.52% by weight of Fe2O36.46-8.44 wt% MgO.
2. The aerated block brick according to claim 1, wherein the average particle size of the quicklime is less than 200 mesh.
3. The novel aerated block brick according to claim 1, wherein the weight ratio of the water to the first dry material is 3-3.5: 2.
4. The novel aerated block brick according to claim 1 or 3, wherein the weight ratio of the carbide slag to the quicklime is 1.9-2.1: 3.
5. A method of making a novel aerated block according to any one of claims 1 to 4, comprising the steps of:
(1) mixing the fly ash, the desulfurized gypsum, the mirabilite and the water, and stirring to prepare slurry;
(2) transferring the slurry into a stirring device, stirring, then adding quicklime and blast furnace mineral powder, stirring, then adding aluminum powder and carbide slag, and stirring to prepare mixed slurry;
(3) injecting the mixed slurry into a mold box, performing bubble carding by using a vibrating bar, and then transferring into a static curing chamber for foaming and static curing to obtain a blank;
(4) transferring the die to a cutting area after the blank meets the cutting requirement, turning the blank by 90 degrees by a turning device, detaching and separating the die and the blank, and cutting the blank into six surfaces to reach the set specification;
(5) placing the cut green body on a waste skin removing overturning table by a lifting appliance, overturning the green body by 90 degrees anticlockwise, and scraping waste materials by a peeling device to obtain a building block green body;
(6) and (4) conveying the building block blank into an autoclave by a lifting appliance for autoclave curing, and discharging the building block blank out of the autoclave to obtain the aerated block brick.
6. The method according to claim 5, wherein in the step (1), the fly ash, the desulfurized gypsum, the mirabilite and the water are added in the following order: water, fly ash, desulfurized gypsum and mirabilite.
7. The method as claimed in claim 5 or 6, wherein the weight ratio of the fly ash, the desulfurized gypsum, the mirabilite, the quicklime, the carbide slag, the aluminum powder and the blast furnace ore powder added in the steps (1) and (2) is 386-396: 120: 14-19:162:100-120:1.3-1.8: 131-138.
8. The method as claimed in claim 5, wherein in the step (2), the weight ratio of the carbide slag to the quick lime is 1.9-2.1: 3.
9. The method as claimed in claim 5, wherein in step (3), the resting temperature is 50-60 ℃, and the resting time is 100-110 min;
preferably, in the step (6), the autoclave curing conditions are as follows: the temperature is 175 ℃ and 180 ℃, the pressure is 0.76-0.79MPa, and the time is 9-12 h.
10. The novel aerated block produced by the method of any one of claims 5 to 9, wherein the pot strength of the novel aerated block is not less than 3.6 MPa.
Technical Field
The invention relates to the technical field of aerated block brick preparation, in particular to a novel aerated block brick and a preparation method thereof.
Background
A large amount of cement and quicklime can be used in the raw materials of the aerated block brick, and the cost of the cement and the quicklime is increased along with the rapid rise of the material price. In order to save cost and improve enterprise competitiveness, a raw material with cheaper price needs to be searched for replacing a raw material with higher price.
The research of the applicant finds that the blast furnace mineral powder is used as a solid waste, and although the physical properties of the cement and the blast furnace mineral powder are greatly different, the chemical compositions of the cement and the blast furnace mineral powder have high similarity. The main component calcium hydroxide in the carbide slag can replace calcium oxide in quicklime under certain conditions, and provides a key calcareous raw material for aerated bricks. If the blast furnace mineral powder and the carbide slag can be used as raw materials to partially or completely replace cement and quick lime, a large amount of production cost can be saved for enterprises, great economic benefits are brought, waste utilization or recycling can be realized, and the clean production strategy is met.
Disclosure of Invention
The invention aims to solve the problems of higher cost and incapability of recycling solid waste in the production of air-added block bricks in the prior art, and provides a novel air-added block brick and a preparation method thereof, wherein blast furnace mineral powder is used for 100% substitution of cement, and mirabilite is added as an activator, so that the activity of the mineral powder is effectively excited; calcium raw materials are provided by replacing about 40% of quicklime with carbide slag, and meanwhile, the proportion of the raw materials is reasonably set, so that the strength of the prepared aerated block brick completely meets the national standard, and mass production can be carried out, so that a large amount of production cost can be saved, and particularly; the cost can be reduced by about 8.8 yuan when the mineral powder replaces 1 cubic meter of cement, and the annual income is increased by 105 million yuan according to 12 million cubic meters of cement used each year; simultaneously, a large amount of solid waste can be consumed, and specifically, 12500m is produced by producing aerated block bricks according to months3The consumed carbide slag is about 594t, and 4752t of carbide slag can be consumed in the year.
In order to achieve the purpose, the invention provides a novel air-added block brick in a first aspect, the raw materials of the novel air-added block brick comprise a first dry material, a second dry material and water, wherein the first dry material comprises fly ash, desulfurized gypsum and mirabilite, the second dry material comprises quick lime, carbide slag, aluminum powder and blast furnace mineral powder, the weight ratio of the water to the first dry material is 2.3-4.3:2, and the weight ratio of the fly ash, the desulfurized gypsum, the mirabilite, the quick lime, the carbide slag, the aluminum powder and the blast furnace mineral powder is 386-doped 396: 120-doped 130:14-19:162: 100-doped 120:1.3-1.8: 131-doped 138;
the fly ash contains 8.95 to 52.38 weight percent of SiO24.68-15.35% by weight of Al2O31.02-2.63% by weight FeO and 1.65-4.52% by weight Fe2O3；
The blast furnace ore powder contains 38.84-41.23 wt% of CaO and 33.52-35.84 wt% of SiO212.62 to 16.24 weight percent of Al2O30.16-0.52% by weight of Fe2O36.46-8.44 wt% MgO.
Preferably, the quicklime has an average particle size of < 200 mesh.
Preferably, the weight ratio of the water to the first dry material is 3-3.5: 2.
Preferably, the weight ratio of the carbide slag to the quick lime is 1.9-2.1: 3.
In a second aspect, the present invention provides a method for preparing the novel aerated block brick described above, comprising the steps of:
(1) mixing the fly ash, the desulfurized gypsum, the mirabilite and the water, and stirring to prepare slurry;
(2) transferring the slurry into a stirring device, stirring, then adding quicklime and blast furnace mineral powder, stirring, then adding aluminum powder and carbide slag, and stirring to prepare mixed slurry;
(3) injecting the mixed slurry into a mold box, performing bubble carding by using a vibrating bar, and then transferring into a static curing chamber for foaming and static curing to obtain a blank;
(4) transferring the die to a cutting area after the blank meets the cutting requirement, turning the blank by 90 degrees by a turning device, detaching and separating the die and the blank, and cutting the blank into six surfaces to reach the set specification;
(5) placing the cut green body on a waste skin removing overturning table by a lifting appliance, overturning the green body by 90 degrees anticlockwise, and scraping waste materials by a peeling device to obtain a building block green body;
(6) and (4) conveying the building block blank into an autoclave by a lifting appliance for autoclave curing, and discharging the building block blank out of the autoclave to obtain the aerated block brick.
Preferably, in the step (1), the fly ash, the desulfurized gypsum, the mirabilite and the water are added in the following order: water, fly ash, desulfurized gypsum and mirabilite.
Preferably, the weight ratio of the fly ash, the desulfurized gypsum, the mirabilite, the quick lime, the carbide slag, the aluminum powder and the blast furnace mineral powder added in the step (1) and the step (2) is 386-396:120-130:14-19:162:100-120:1.3-1.8: 131-138.
Preferably, in the step (2), the weight ratio of the carbide slag to the quicklime is 1.9-2.1: 3.
Preferably, in the step (3), the resting temperature is 50-60 ℃, and the resting time is 100-110 min.
Preferably, in the step (6), the autoclave curing conditions are as follows: the temperature is 175 ℃ and 180 ℃, the pressure is 0.76-0.79MPa, and the time is 9-12 h.
The third aspect of the invention provides a novel aerated block brick prepared by the method, wherein the kettle-out strength of the novel aerated block brick is more than or equal to 3.6 MPa.
According to the invention, the blast furnace mineral powder is used for 100% substitution of cement, and meanwhile, mirabilite is added as an excitant, so that the activity of the mineral powder is effectively excited; the calcium raw materials are provided by replacing 40% of quicklime with the carbide slag, meanwhile, the proportion of the raw materials is reasonably set, especially the dosage ratio of the blast furnace mineral powder to the mirabilite, the dosage ratio of the carbide slag to the quicklime and the dosage ratio of water to the first dry material, the strength of the prepared aerated block brick completely meets the national standard, batch production can be carried out, a large amount of production cost can be saved, a large amount of solid waste can be consumed, and resource production is realized.
Detailed Description
The following describes in detail specific embodiments of the present invention. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For ranges of values, between the endpoints of each of the ranges and the individual points, and between the individual points may be combined with each other to give one or more new ranges of values, and these ranges of values should be considered as specifically disclosed herein.
The invention provides a novel air-added block brick, which comprises raw materials of a first dry material, a second dry material and water, wherein the first dry material comprises fly ash, desulfurized gypsum and mirabilite, the second dry material comprises quick lime, carbide slag, aluminum powder and blast furnace mineral powder, the weight ratio of the water to the first dry material is 2.3-4.3:2, and the weight ratio of the fly ash, the desulfurized gypsum, the mirabilite, the quick lime, the carbide slag, the aluminum powder and the blast furnace mineral powder is 386-type 396: 120-type 130:14-19:162: 100-type 120:1.3-1.8: 131-type 138;
the fly ash contains 8.95 to 52.38 weight percent of SiO24.68-15.35% by weight of Al2O31.02-2.63% by weight FeO and 1.65-4.52% by weight Fe2O3；
The blast furnace ore powder contains 38.84-41.23 wt% of CaO and 33.52-35.84 wt% of SiO212.62 to 16.24 weight percent of Al2O30.16-0.52% by weight of Fe2O36.46-8.44 wt% MgO.
In the invention, although the chemical composition of the blast furnace mineral powder is extremely similar to that of cement, in the test process, the blast furnace mineral powder is lack of activity and slow in hydration reaction, slurry thickening time can be caused in the aerated block production process, and the green body is collapsed in the later period due to asynchronous quicklime reaction time and blast furnace mineral powder reaction time, so that a catalyst is required to be added for solving the problem of activity of the blast furnace mineral powder. Found through research, mirabilite (Na)2SO4·10H2O) can be used as an excitant, can effectively excite the activity of blast furnace mineral powder, provides a hydration reaction environment, ensures the balance point of quicklime digestion reaction, mineral powder hydration reaction and aluminum powder gassing reaction in time, and ensures the stable forming of the pore structure in the gas-adding block blank. In addition, it was found in the study that the main component of carbide slag was Ca (OH)2Although the main components are the same as those of the digested quicklime, the digested quicklime can be substituted by the same, but the digested quicklime cannot be completely substituted by the same, and the content of the quicklime needs to be controlled within a proper range.
In the invention, in order to ensure the strength of the finished aerated block brick, the use amounts of the fly ash, the desulfurized gypsum, the carbide slag, the mirabilite, the quick lime, the aluminum powder and the blast furnace mineral powder are reasonably controlled, and the proportion of the added water and the first dry material is controlled, so that the hydration reaction and other reactions of all raw materials are normally and fully carried out.
In a specific embodiment, the quicklime needs to be ground before use, so that the raw materials are fully mixed, and the reaction is smoothly carried out. In a preferred embodiment, the quicklime may be ground to an average particle size of the quicklime < 200 mesh.
In the invention, in order to promote the hydrates of hydrated calcium silicate, hydrated calcium aluminosilicate, hydrated calcium aluminate and hydrated calcium sulfoaluminate to be cemented with various solid particles to form well-crystallized single-alkali hydrated calcium silicate, form a firm integral structure and improve the strength of the finished aerated block brick, the proportion of the raw materials, such as the dosage ratio of the blast furnace mineral powder to mirabilite, the dosage ratio of the carbide slag to quicklime and the dosage ratio of water to the first dry material, must be strictly controlled. In the invention, in order to overcome the defect of low activity of the blast furnace mineral powder and fully play the role of mirabilite as an excitant, a proper amount of mirabilite must be added. In a specific embodiment, the amount of mirabilite is determined according to the addition amount of the blast furnace mineral powder.
In a specific embodiment, the weight ratio of the fly ash, the desulfurized gypsum, the mirabilite, the quick lime, the carbide slag, the aluminum powder and the blast furnace ore powder can be (386, 388, 390, 392, 394 or 396) (120, 122, 124, 126, 128 or 130) (14, 15, 16, 17, 18 or 19):162 (100, 102, 104, 106, 108, 110, 112, 114, 116, 118 or 120) (1.3, 1.4, 1.5, 1.6, 1.7 or 1.8) (131, 132, 133, 134, 135, 136, 137 or 138).
In particular embodiments, the weight ratio of the water to the first dry matter may be 2.3:2, 2.5:2, 2.7:2, 2.9:2, 3:2, 3.1:2, 3.3:2, 3.5:2, 3.7:2, 3.9:2, 4:2, 4.1:2, or 4.3: 2.
In a preferred embodiment, the weight ratio of said water to said first dry matter is from 3 to 3.5: 2.
In the invention, the inventor finds that when the proportion of the carbide slag replacing the quicklime reaches a certain value, the proportion of the carbide slag replacing the quicklime is continuously increased, and the strength of the aerated brick is reduced. In order to save the production cost and improve the strength of the aerated block brick, the proportion of the carbide slag and the quicklime needs to be reasonably controlled.
In a preferred embodiment, the weight ratio of the carbide slag to the quicklime is 1.9-2.1: 3. In a more preferred embodiment, the weight ratio of the carbide slag to the quicklime is 2: 3.
In a second aspect, the present invention provides a method for preparing the novel aerated block brick described above, comprising the steps of:
(1) mixing the fly ash, the desulfurized gypsum, the mirabilite and the water, and stirring to prepare slurry;
(2) transferring the slurry into a stirring device, stirring, then adding quicklime and blast furnace mineral powder, stirring, then adding aluminum powder and carbide slag, and stirring to prepare mixed slurry;
(3) injecting the mixed slurry into a mold box, performing bubble carding by using a vibrating bar, and then transferring into a static curing chamber for foaming and static curing to obtain a blank;
(4) transferring the die to a cutting area after the blank meets the cutting requirement, turning the blank by 90 degrees by a turning device, detaching and separating the die and the blank, and cutting the blank into six surfaces to reach the set specification;
(5) placing the cut green body on a waste skin removing overturning table by a lifting appliance, overturning the green body by 90 degrees anticlockwise, and scraping waste materials by a peeling device to obtain a building block green body;
(6) and (4) conveying the building block blank into an autoclave by a lifting appliance for autoclave curing, and discharging the building block blank out of the autoclave to obtain the aerated block brick.
The method comprises the steps of mixing fly ash, desulfurized gypsum, mirabilite and water to prepare slurry, stirring, then adding quicklime and blast furnace mineral powder, stirring, adding aluminum powder and carbide slag, stirring to prepare mixed slurry, and then sequentially carrying out foaming and static curing, cutting, waste removal and autoclaved curing to prepare the aerated block brick meeting the national standard.
In the method, in order to improve the strength of the prepared aerated block brick, the adding sequence of the raw materials needs to be reasonably controlled.
In a preferred embodiment, in step (1), the fly ash, the desulfurized gypsum, the mirabilite and the water are added in the following order: water, fly ash, desulfurized gypsum and mirabilite.
In the invention, in order to promote the hydrates of hydrated calcium silicate, hydrated calcium aluminosilicate, hydrated calcium aluminate and hydrated calcium sulfoaluminate to be cemented with various solid particles to form well-crystallized single-alkali hydrated calcium silicate, form a firm integral structure and improve the strength of the finished aerated block brick, the proportion of the raw materials, such as the dosage ratio of the blast furnace mineral powder to mirabilite, the dosage ratio of the carbide slag to quicklime and the dosage ratio of water to the first dry material, must be strictly controlled.
In a specific embodiment, the weight ratio of the fly ash, the desulfurized gypsum, the mirabilite, the quicklime, the carbide slag, the aluminum powder and the blast furnace ore powder added in the step (1) and the step (2) is 386, 388, 390, 392, 394 or 396, (120, 122, 124, 126, 128 or 130), (14, 15, 16, 17, 18 or 19), (162), (100, 102, 104, 106, 108, 110, 112, 114, 116, 118 or 120), (1.3, 1.4, 1.5, 1.6, 1.7 or 1.8), (131, 132, 133, 134, 135, 136, 137 or 138).
In order to save the production cost and improve the strength of the aerated block brick, the proportion of the carbide slag and the quicklime needs to be reasonably controlled.
In a preferred embodiment, the weight ratio of the carbide slag to the quicklime is 1.9-2.1: 3. In a more preferred embodiment, the weight ratio of the carbide slag to the quicklime is 2: 3.
In order to reduce the surface defects of the aerated block bricks, form qualified aerated block bricks and further improve the quality of the aerated block bricks, the static curing condition needs to be reasonably controlled.
In the step (3), the rest temperature is 50-60 ℃; specifically, for example, the temperature can be 50 ℃, 51 ℃, 52 ℃, 53 ℃, 54 ℃, 55 ℃, 56 ℃, 57 ℃, 58 ℃, 59 ℃ or 60 ℃.
In the step (3), the resting time is 100-110 min; specifically, for example, it may be 101min, 102min, 103min, 104min, 105min, 106min, 107min, 108min, 109min, or 110 min.
In a preferred embodiment, in step (3), the resting temperature is 56 ℃ and the resting time is 105 min.
In order to promote hydrates such as calcium silicate hydrate, calcium aluminosilicate hydrate, calcium aluminate hydrate and calcium sulfoaluminate hydrate to be cemented with various solid particles to form well-crystallized single-alkali calcium silicate hydrate, form a firm integral structure and improve the strength of the finished aerated block brick, the autoclaved curing condition needs to be reasonably controlled.
In the step (6), the temperature of the steam pressure curing is 175-180 ℃; specifically, the temperature may be 175 ℃, 176 ℃, 177 ℃, 178 ℃, 179 ℃ or 180 ℃.
In the step (6), the autoclave curing pressure is 0.76 to 0.79MPa, and specifically, for example, may be 0.76MPa, 0.77MPa, 0.78MPa, or 0.79 MPa.
In the step (6), the autoclave curing time is 9 to 12 hours, and specifically, for example, 9 hours, 9.5 hours, 10 hours, 10.5 hours, 11 hours, 11.5 hours, or 12 hours may be used.
In a preferred embodiment, in the step (6), the autoclave curing conditions are: the temperature is 180 ℃, the pressure is 0.79MPa, and the time is 10 h.
The novel aerated block brick prepared by the method has the pot discharging strength of more than or equal to 3.6MPa and the appearance indexes of: no edge missing and corner dropping, no crack, no collapse, even air hole and no big hole, and all the indexes meet the national standard requirements.
The present invention will be described in detail by way of examples, but the scope of the present invention is not limited thereto.
Example 1
(1) Mixing water and dry materials according to the sequence of water, fly ash, desulfurized gypsum and mirabilite, wherein the weight ratio of the water to the dry materials is 3.2:2, and stirring to obtain slurry;
(2) transferring the slurry into a stirring device, stirring, adding quicklime with the granularity less than 200 meshes and blast furnace mineral powder, stirring, adding aluminum powder and carbide slag, stirring, and preparing mixed slurry, wherein the weight ratio of the fly ash, the desulfurized gypsum, the mirabilite, the quicklime, the carbide slag, the aluminum powder and the blast furnace mineral powder added in the step (1) and the step (2) is 390:125:19:162:108:1.5: 132;
(3) injecting the mixed slurry into a mould box, performing bubble carding by using a vibrating rod, and then transferring into a static curing chamber for foaming and static curing, wherein the static curing temperature is 56 ℃, and the static curing time is 105min, so as to obtain an embryo body;
(4) transferring the die to a cutting area after the blank meets the cutting requirement, turning the blank by 90 degrees by a turning device, detaching and separating the die and the blank, and cutting the blank into six surfaces to reach the set specification;
(5) placing the cut green body on a waste skin removing overturning table by a lifting appliance, overturning the green body by 90 degrees anticlockwise, and scraping waste materials by a peeling device to obtain a building block green body;
(6) sending the building block blank into an autoclave by a lifting appliance for autoclave curing, wherein the autoclave curing temperature is 180 ℃, the pressure is 0.79MPa, and the time is 10 hours, and discharging the building block blank out of the autoclave to obtain an aerated block brick;
the fly ash contains 20.54 weight percent of SiO26.38% by weight of Al2O31.52% by weight FeO and 3.25% by weight Fe2O3；
The blast furnace ore powder contains 39.84 wt% of CaO and 34.65 wt% of SiO214.54% by weight of Al2O30.25% by weight of Fe2O37.10% by weight of MgO.
Example 2
(1) Mixing water and dry materials according to the sequence of water, fly ash, desulfurized gypsum and mirabilite, wherein the weight ratio of the water to the dry materials is 3:2, and stirring to prepare slurry;
(2) transferring the slurry into a stirring device, stirring, adding quicklime with the granularity less than 200 meshes and blast furnace mineral powder, stirring, adding aluminum powder and carbide slag, stirring, and preparing mixed slurry, wherein the weight ratio of the fly ash, the desulfurized gypsum, the mirabilite, the quicklime, the carbide slag, the aluminum powder and the blast furnace mineral powder added in the step (1) and the step (2) is 396:130:14:162:100:1.3: 137;
(3) injecting the mixed slurry into a mold box, performing bubble carding by using a vibrating rod, and then transferring into a resting chamber for foaming and resting at the resting temperature of 50 ℃ for 100min to obtain a blank;
(4) transferring the die to a cutting area after the blank meets the cutting requirement, turning the blank by 90 degrees by a turning device, detaching and separating the die and the blank, and cutting the blank into six surfaces to reach the set specification;
(5) placing the cut green body on a waste skin removing overturning table by a lifting appliance, overturning the green body by 90 degrees anticlockwise, and scraping waste materials by a peeling device to obtain a building block green body;
(6) sending the building block blank into an autoclave by a lifting appliance for autoclave curing, wherein the autoclave curing temperature is 177 ℃, the pressure is 0.76MPa, and the time is 12 hours, and discharging the building block blank out of the autoclave to obtain an aerated block brick;
the fly ash contains 20.54 weight percent of SiO26.38% by weight of Al2O31.52% by weight FeO and 3.25% by weight Fe2O3；
The blast furnace ore powder contains 39.84 wt% of CaO and 34.65 wt% of SiO214.54% by weight of Al2O30.25% by weight of Fe2O37.10% by weight of MgO.
Example 3
(1) Mixing water and dry materials according to the sequence of water, fly ash, desulfurized gypsum and mirabilite, wherein the weight ratio of the water to the dry materials is 3.5:2, and stirring to obtain slurry;
(2) transferring the slurry into a stirring device, stirring, adding quicklime with the granularity less than 200 meshes and blast furnace mineral powder, stirring, adding aluminum powder and carbide slag, stirring, and preparing mixed slurry, wherein the weight ratio of the fly ash, the desulfurized gypsum, the mirabilite, the quicklime, the carbide slag, the aluminum powder and the blast furnace mineral powder added in the step (1) and the step (2) is 390:120:17:162:120:1.8: 134;
(3) injecting the mixed slurry into a mold box, performing bubble carding by using a vibrating rod, and then transferring into a resting chamber for foaming and resting at the resting temperature of 60 ℃ for 110min to obtain a blank;
(4) transferring the die to a cutting area after the blank meets the cutting requirement, turning the blank by 90 degrees by a turning device, detaching and separating the die and the blank, and cutting the blank into six surfaces to reach the set specification;
(5) placing the cut green body on a waste skin removing overturning table by a lifting appliance, overturning the green body by 90 degrees anticlockwise, and scraping waste materials by a peeling device to obtain a building block green body;
(6) sending the building block blank into an autoclave by a lifting appliance for autoclave curing, wherein the autoclave curing temperature is 175 ℃, the pressure is 0.78MPa, and the time is 9 hours, and discharging the building block blank out of the autoclave to obtain an aerated block brick;
the fly ash contains 20.54 weight percent of SiO26.38% by weight of Al2O31.52% by weight FeO and 3.25% by weight Fe2O3；
The blast furnace ore powder contains 39.84 wt% of CaO and 34.65 wt% of SiO214.54% by weight of Al2O30.25% by weight of Fe2O37.10% by weight of MgO.
Example 4
The process is carried out as in example 1, except that in step (1) the weight ratio of water to dry material is 2.3: 2.
Comparative example 1
The process is carried out as in example 1, except that in step (1) the weight ratio of water to dry material is 1.5: 2.
Comparative example 2
The process was carried out as in example 1, except that the weight ratio of fly ash, desulfurized gypsum, mirabilite, quick lime, carbide slag, aluminum powder and blast furnace ore powder added in steps (1) and (2) was 390:125:19:162:150:1.5: 132.
Comparative example 3
The process is carried out as in example 1, except that the weight ratio of fly ash, desulfurized gypsum, mirabilite, quicklime, carbide slag, aluminum powder and blast furnace ore powder added in steps (1) and (2) is 390:125:12:162:108:1.5: 132.
Test example
The finished aerated bricks prepared in examples 1 to 4 and comparative examples 1 to 3 were tested for pot strength while observing the appearance of the finished aerated bricks, and the results are shown in table 1.
TABLE 1
Example numbering
Out-of-kettle strength/MPa
Appearance of the product
Example 1
4.2
Surface defect free
Example 2
4.0
Surface defect free
Example 3
4.1
Surface defect free
Example 4
3.6
Surface defect free
Comparative example 1
2.8
Surface collapse
Comparative example 2
2.3
Surface defect free
Comparative example 3
2.5
Having cracks on the surface
The results in table 1 show that the aerated block brick prepared by the formula and the method has the pot-out strength of more than or equal to 3.6MPa, no edge and corner loss, no crack and no collapse, uniform pores and no macropore in appearance, and all indexes meet the national standard requirements.
The preferred embodiments of the present invention have been described above in detail, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, many simple modifications can be made to the technical solution of the invention, including combinations of various technical features in any other suitable way, and these simple modifications and combinations should also be regarded as the disclosure of the invention, and all fall within the scope of the invention.
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