CN113372080A - Method for preparing high-strength steam brick by using construction waste - Google Patents
Method for preparing high-strength steam brick by using construction waste Download PDFInfo
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- CN113372080A CN113372080A CN202110673630.5A CN202110673630A CN113372080A CN 113372080 A CN113372080 A CN 113372080A CN 202110673630 A CN202110673630 A CN 202110673630A CN 113372080 A CN113372080 A CN 113372080A
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- 239000002699 waste material Substances 0.000 title claims abstract description 62
- 238000010276 construction Methods 0.000 title claims abstract description 60
- 239000011449 brick Substances 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000011282 treatment Methods 0.000 claims abstract description 176
- 239000000843 powder Substances 0.000 claims abstract description 126
- 239000000203 mixture Substances 0.000 claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000010881 fly ash Substances 0.000 claims description 31
- 239000000463 material Substances 0.000 claims description 21
- 238000010298 pulverizing process Methods 0.000 claims description 21
- 238000005303 weighing Methods 0.000 claims description 20
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 18
- 229910052602 gypsum Inorganic materials 0.000 claims description 12
- 239000010440 gypsum Substances 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 12
- 239000002893 slag Substances 0.000 claims description 12
- 239000012530 fluid Substances 0.000 claims description 11
- 238000000748 compression moulding Methods 0.000 claims description 10
- 230000029087 digestion Effects 0.000 claims description 10
- 238000005096 rolling process Methods 0.000 claims description 10
- 229920006395 saturated elastomer Polymers 0.000 claims description 10
- RGZSQWQPBWRIAQ-CABCVRRESA-N (-)-alpha-Bisabolol Chemical compound CC(C)=CCC[C@](C)(O)[C@H]1CCC(C)=CC1 RGZSQWQPBWRIAQ-CABCVRRESA-N 0.000 claims description 9
- 239000001500 (2R)-6-methyl-2-[(1R)-4-methyl-1-cyclohex-3-enyl]hept-5-en-2-ol Substances 0.000 claims description 9
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 claims description 9
- RGZSQWQPBWRIAQ-LSDHHAIUSA-N alpha-Bisabolol Natural products CC(C)=CCC[C@@](C)(O)[C@@H]1CCC(C)=CC1 RGZSQWQPBWRIAQ-LSDHHAIUSA-N 0.000 claims description 9
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 9
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 9
- 238000001914 filtration Methods 0.000 claims description 9
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims description 9
- XMGQYMWWDOXHJM-SNVBAGLBSA-N (-)-α-limonene Chemical compound CC(=C)[C@H]1CCC(C)=CC1 XMGQYMWWDOXHJM-SNVBAGLBSA-N 0.000 claims description 3
- 239000002994 raw material Substances 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 10
- 238000012545 processing Methods 0.000 abstract description 9
- 239000004566 building material Substances 0.000 abstract description 2
- 230000004927 fusion Effects 0.000 abstract description 2
- 239000012615 aggregate Substances 0.000 description 10
- 238000004064 recycling Methods 0.000 description 4
- 238000005119 centrifugation Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- 239000002956 ash Substances 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 229960005235 piperonyl butoxide Drugs 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 231100000481 chemical toxicant Toxicity 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000008240 homogeneous mixture Substances 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000011812 mixed powder Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010813 municipal solid waste Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- -1 slay Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Classifications
-
- 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
- C04B28/14—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 calcium sulfate cements
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00017—Aspects relating to the protection of the environment
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Landscapes
- 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)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a method for preparing a high-strength steam brick by using construction waste, which belongs to the technical field of building material processing and comprises the following steps: (1) sorting and crushing; (2) high-temperature high-pressure treatment; (3) flame treatment; (4) crushing; (5) vortex-centrifugation-vortex alternative treatment; (6) and (5) preparing a finished product. The application provides a method for preparing a high-strength steam brick by using construction wastes, which purifies the construction wastes by sorting, crushing, high-temperature and high-pressure treatment and flame treatment of the construction wastes, improves the surface activity of the construction waste powder, promotes the fusion of the construction waste powder and other raw material components of the steam brick, destroys water films existing on the surfaces of the raw materials by means of ultraviolet irradiation, vortex-centrifugation-vortex alternative treatment and the like, weakens and destroys the interface effect among the raw materials, forms a homogeneous and refined mixture and further improves the mechanical property of a finished steam brick.
Description
Technical Field
The invention belongs to the technical field of building material processing, and particularly relates to a method for preparing a high-strength steam brick by using building wastes.
Background
The steam brick is prepared by taking fly ash or other slag or lime sand as a raw material, adding lime, gypsum and aggregate, and performing processes of blank preparation, press forming, efficient steam curing and the like. The brick pressing is carried out by stirring and digesting, and the finished product of the steam brick machine is put into a kettle to be autoclaved at high temperature to form the steam brick. The steam brick is mainly used for bearing walls, can be used as an additive material of a frame structure due to light weight, has the characteristics of light weight, heat preservation, heat insulation, processability, construction period shortening and the like, can digest a large amount of fly ash, saves cultivated land, reduces pollution and protects the environment. The steam brick is suitable for the inner and outer walls of various civil buildings, public buildings and industrial plants and the foundation of houses, and is a product for replacing sintered clay bricks.
The construction waste refers to residue, waste soil, neat materials and other wastes generated in the process of construction, laying or dismantling and repairing of various buildings, structures, pipe networks and the like by construction units or individuals. Most of the construction wastes are transported to the suburbs or villages without any treatment, and are stacked or buried in the open air, so that a large amount of construction expenses such as land charge for collection, garbage clearing and transporting cost and the like are consumed, and meanwhile, the problems of scattering and layering, flying of ash and sand and the like in the clearing and stacking processes cause serious environmental pollution.
Fly ash is fine ash collected from flue gas generated after coal combustion, and is main solid waste discharged from coal-fired power plants. The main oxide composition of the fly ash of the thermal power plant in China is as follows: SiO 22、Al2O3、FeO、Fe2O3、CaO、TiO2And the like. Along with the development of the power industry, the discharge amount of fly ash of coal-fired power plants is increased year by year, and the fly ash becomes one of industrial waste residues with larger discharge amount in China. A large amount of fly ash can generate dust without treatment, thereby polluting the atmosphere; if discharged into a water system, the river can be silted, and toxic chemicals in the river can cause harm to human bodies and organisms.
Therefore, the recycling of the construction waste and the fly ash is considered, the recycling of resources is realized, and the resources are saved. Although construction waste and fly ash are used at present, the use effect is poor due to unreasonable treatment means.
Disclosure of Invention
The invention aims to solve the existing problems and provides a method for preparing a high-strength steam brick by using construction waste.
The invention is realized by the following technical scheme:
a method for preparing high-strength steam bricks by using construction wastes comprises the following steps:
(1) sorting and crushing:
sorting the construction waste, and then placing the sorted construction waste into a crusher for primary crushing treatment to obtain powder A for later use;
(2) high-temperature high-pressure treatment:
immersing the powder A obtained in the step (1) into a treatment solution, then placing the treatment solution in which the powder A is immersed into a high-temperature high-pressure pot, carrying out high-temperature high-pressure treatment, and filtering and drying after the treatment to obtain powder B for later use;
(3) flame treatment:
carrying out flame treatment on the powder B obtained in the step (2) by using flame outer flame to obtain powder C for later use;
(4) and (3) crushing treatment:
weighing 32-36 parts by weight of the powder C obtained in the step (3) and 60-70 parts by weight of fly ash together, placing the powder C and the fly ash into a pulverizer for pulverization, and performing ultraviolet irradiation treatment while pulverizing to obtain powder D for later use;
(5) vortex-centrifuge-vortex alternative treatment:
placing the powder D obtained in the step (4) into a vortex machine, then weighing 20-30 parts of ore aggregate, 5-9 parts of gypsum, 6-10 parts of slag and 30-50 parts of mixing water in corresponding parts by weight, sequentially placing the materials into the vortex machine for primary vortex treatment, placing the materials into a centrifugal machine for centrifugal treatment, finally placing the materials into the vortex machine for secondary vortex treatment, and obtaining a mixture for later use after the secondary vortex treatment is completed;
(6) and (3) preparing a finished product:
and (5) sequentially carrying out digestion, rolling, compression molding and high-pressure saturated steam curing on the mixture obtained in the step (5).
Further, the treating fluid in the step (2) comprises the following components in percentage by weight: 4-5% of calcium carbonate, 6-9% of sodium bicarbonate, 0.6-0.9% of alpha-bisabolol, 0.4-0.6% of beta-limonene, 10-12% of sodium dodecyl benzene sulfonate and the balance of pure water.
Further, the technical parameters of the high-temperature high-pressure treatment in the step (2) are as follows: the temperature is 130-160 ℃, the pressure is 2-4 MPa, and the time is 1-1.6 h.
Through adopting above-mentioned technical scheme, carry out preliminary crushing after sorting building waste, subsequent processing of being convenient for is with the powder of gained in soaking the treatment fluid then carry out high temperature high pressure and is handled, and at the in-process that the intensification was boosted, the powder can take place swelling of certain degree, and effective component in the treatment fluid is along with the swelling of powder and is soaked between the powder to and inside the powder, acts on the powder, improves the specific surface area of powder, improves the surface activity of powder.
Further, in the flame treatment in the step (3), the distance between the powder B and the flame outer flame is controlled to be 0.2-0.3 cm, and the flame treatment time is 20-24 min.
By adopting the technical scheme, the powder after high-temperature and high-pressure treatment is subjected to flame treatment by using flame outer flame, carbon chains are degraded by the flame treatment, and polar groups such as carboxyl groups, carbonyl groups and the like are claimed, so that the surface of the powder is modified and activated, the surface wettability of the powder is enhanced, and the processing characteristics of the powder are further improved.
Further, the wavelength of the ultraviolet light is controlled to be 200-400 nm during the ultraviolet light irradiation treatment in the step (4).
By adopting the technical scheme, the powder after flame treatment and the fly ash are jointly placed in the pulverizer according to a proper proportion for temporary pulverization treatment, and ultraviolet light irradiation treatment is carried out while pulverization, so that the surface of the powder can be partially oxidized by the irradiation of the ultraviolet light, the interface phenomenon between the two kinds of powder is eliminated, and the agglomeration phenomenon can be prevented.
Further, the primary vortex processing in the step (5) has the vortex speed of 1000-1400 rpm and the time of 10-20 min, the rotation speed of 8000-10000 rpm and the time of 20-24 min, and the secondary vortex processing has the speed of 3000-3600 rpm and the time of 30-40 min.
Through adopting above-mentioned technical scheme, the mixed powder with slag stone, gypsum, slay, mix water with building waste and fly ash is arranged in proper order in the vortex machine and is carried out vortex processing, the speed of vortex once of adjustment promotes the homogeneity of each raw materials, then carries out centrifugal treatment, with the help of the effect of centrifugal force, makes each raw materials in close contact with each other to the water film that each raw materials surface exists can be destroyed to centrifuge's centrifugal force, weakens the interface effect that exists between each raw materials, carries out vortex processing again this moment, can further refine, homogeneous mixture.
Compared with the prior art, the invention has the following advantages:
the application provides a method for preparing a high-strength steam brick by using construction wastes, which realizes the recycling of waste buildings, avoids the waste of construction resources, realizes the recycling of resources, purifies the construction wastes by sorting, crushing, high-temperature and high-pressure treatment and flame treatment of the construction wastes, improves the surface activity of construction waste powder, promotes the fusion of the construction waste powder and other raw material components of the steam brick, destroys water films existing on the surfaces of raw materials by means of ultraviolet irradiation, vortex-centrifugation-vortex alternative treatment and the like, weakens and destroys the interface effect among the raw materials, forms a homogeneous and refined mixture, and further improves the mechanical property of a finished steam brick.
Detailed Description
A method for preparing high-strength steam bricks by using construction wastes comprises the following steps:
(1) sorting and crushing:
sorting the construction waste, and then placing the sorted construction waste into a crusher for primary crushing treatment to obtain powder A for later use;
(2) high-temperature high-pressure treatment:
immersing the powder A obtained in the step (1) into a treatment solution, then placing the treatment solution immersed with the powder A into a high-temperature pressure cooker, performing high-temperature and high-pressure treatment at the temperature of 130-160 ℃ and the pressure of 2-4 MPa, filtering out and drying after 1-1.6 h to obtain powder B for later use; the treating fluid comprises the following components in percentage by weight: 4-5% of calcium carbonate, 6-9% of sodium bicarbonate, 0.6-0.9% of alpha-bisabolol, 0.4-0.6% of beta-limonene, 10-12% of sodium dodecyl benzene sulfonate and the balance of pure water;
(3) flame treatment:
performing flame treatment on the powder B obtained in the step (2) by using flame outer flames, wherein the distance between the powder B and the flame outer flames is controlled to be 0.2-0.3 cm during the treatment, and the powder C is obtained for standby after the flame treatment for 20-24 min;
(4) and (3) crushing treatment:
weighing 32-36 parts by weight of the powder C obtained in the step (3) and 60-70 parts by weight of fly ash together, placing the powder C and the fly ash into a pulverizer for pulverization, performing ultraviolet irradiation treatment while pulverizing, and controlling the wavelength of ultraviolet light to be 200-400 nm to obtain powder D for later use;
(5) vortex-centrifuge-vortex alternative treatment:
placing the powder D obtained in the step (4) into a vortex machine, then weighing 20-30 parts by weight of ore aggregate, 5-9 parts by weight of gypsum, 6-10 parts by weight of slag and 30-50 parts by weight of mixing water, sequentially placing the powder D into the vortex machine to carry out primary vortex treatment at 1000-1400 rpm for 10-20 min, then placing the powder D into the vortex machine to carry out centrifugation at 8000-10000 rpm for 20-24 min, finally placing the powder D into the vortex machine to carry out secondary vortex treatment at 3000-3600 rpm for 30-40 min, and obtaining a mixture for later use;
(6) and (3) preparing a finished product:
and (5) sequentially carrying out digestion, rolling, compression molding and high-pressure saturated steam curing on the mixture obtained in the step (5).
For further explanation of the present invention, reference will now be made to the following specific examples.
Example 1
A method for preparing high-strength steam bricks by using construction wastes comprises the following steps:
(1) sorting and crushing:
sorting the construction waste, and then placing the sorted construction waste into a crusher for primary crushing treatment to obtain powder A for later use;
(2) high-temperature high-pressure treatment:
immersing the powder A obtained in the step (1) into a treatment solution, then placing the treatment solution in which the powder A is immersed into a high-temperature pressure cooker, performing high-temperature high-pressure treatment at 130 ℃ and 2MPa for 1h, filtering and drying to obtain powder B for later use; the treating fluid comprises the following components in percentage by weight: 4% of calcium carbonate, 6% of sodium bicarbonate, 0.6% of alpha-bisabolol, 0.4% of beta-piperylene, 10% of sodium dodecyl benzene sulfonate and the balance of pure water;
(3) flame treatment:
carrying out flame treatment on the powder B obtained in the step (2) by using flame outer flame, wherein the distance between the powder B and the flame outer flame is controlled to be 0.2cm during the treatment, and the powder C is obtained for standby after the flame treatment for 20 min;
(4) and (3) crushing treatment:
weighing 32 parts by weight of the powder C obtained in the step (3) and 60 parts by weight of fly ash together, placing the powder C and the fly ash into a pulverizer for pulverization treatment, performing ultraviolet irradiation treatment while pulverizing, and controlling the wavelength of ultraviolet light to be 200nm to obtain powder D for later use;
(5) vortex-centrifuge-vortex alternative treatment:
placing the powder D obtained in the step (4) into a vortex machine, then weighing 20 parts of ore aggregate, 5 parts of gypsum, 6 parts of slag and 30 parts of mixing water in corresponding parts by weight, sequentially placing the mixture into the vortex machine to carry out primary vortex treatment for 10min at 1000rpm, then placing the mixture into the centrifugal machine to carry out centrifugation for 20min at 8000rpm, finally placing the mixture into the vortex machine to carry out secondary vortex treatment for 30min at 3000rpm, and obtaining a mixture for later use;
(6) and (3) preparing a finished product:
and (5) sequentially carrying out digestion, rolling, compression molding and high-pressure saturated steam curing on the mixture obtained in the step (5).
Example 2
A method for preparing high-strength steam bricks by using construction wastes comprises the following steps:
(1) sorting and crushing:
sorting the construction waste, and then placing the sorted construction waste into a crusher for primary crushing treatment to obtain powder A for later use;
(2) high-temperature high-pressure treatment:
immersing the powder A obtained in the step (1) into a treatment solution, then placing the treatment solution in which the powder A is immersed into a high-temperature pressure cooker, performing high-temperature and high-pressure treatment at 145 ℃ and 3MPa for 1.3h, filtering out and drying to obtain powder B for later use; the treating fluid comprises the following components in percentage by weight: 4.5% of calcium carbonate, 7.5% of sodium bicarbonate, 0.75% of alpha-bisabolol, 0.5% of beta-piperylene, 11% of sodium dodecyl benzene sulfonate and the balance of pure water;
(3) flame treatment:
carrying out flame treatment on the powder B obtained in the step (2) by using flame outer flame, wherein the distance between the powder B and the flame outer flame is controlled to be 0.25cm during the treatment, and the powder C is obtained for standby after the flame treatment for 22 min;
(4) and (3) crushing treatment:
weighing 34 parts of the powder C obtained in the step (3) and 65 parts of fly ash in corresponding parts by weight, putting the powder C and the fly ash into a pulverizer together for pulverization treatment, performing ultraviolet irradiation treatment while pulverizing, controlling the wavelength of ultraviolet light to be 300nm, and obtaining powder D for later use;
(5) vortex-centrifuge-vortex alternative treatment:
placing the powder D obtained in the step (4) into a vortex machine, then weighing 25 parts of ore aggregate, 7 parts of gypsum, 8 parts of slag and 40 parts of mixing water in corresponding parts by weight, sequentially placing the materials into the vortex machine to carry out primary vortex treatment for 15min at 1200rpm, then placing the materials into the centrifugal machine to carry out centrifugal treatment for 22min at 9000rpm, finally placing the materials into the vortex machine to carry out secondary vortex treatment for 35min at 3300rpm, and obtaining a mixture for later use after completion;
(6) and (3) preparing a finished product:
and (5) sequentially carrying out digestion, rolling, compression molding and high-pressure saturated steam curing on the mixture obtained in the step (5).
Example 3
A method for preparing high-strength steam bricks by using construction wastes comprises the following steps:
(1) sorting and crushing:
sorting the construction waste, and then placing the sorted construction waste into a crusher for primary crushing treatment to obtain powder A for later use;
(2) high-temperature high-pressure treatment:
immersing the powder A obtained in the step (1) into a treatment solution, then placing the treatment solution in which the powder A is immersed into a high-temperature pressure cooker, performing high-temperature and high-pressure treatment at the temperature of 160 ℃ and the pressure of 4MPa for 1.6h, filtering out and drying to obtain powder B for later use; the treating fluid comprises the following components in percentage by weight: 5% of calcium carbonate, 9% of sodium bicarbonate, 0.9% of alpha-bisabolol, 0.6% of beta-piperylene, 12% of sodium dodecyl benzene sulfonate and the balance of pure water;
(3) flame treatment:
carrying out flame treatment on the powder B obtained in the step (2) by using flame outer flame, wherein the distance between the powder B and the flame outer flame is controlled to be 0.3cm during the treatment, and carrying out flame treatment for 24min to obtain powder C for later use;
(4) and (3) crushing treatment:
weighing 36 parts by weight of the powder C obtained in the step (3) and 70 parts by weight of fly ash together, placing the powder C and the fly ash into a pulverizer for pulverization treatment, performing ultraviolet irradiation treatment while pulverizing, and controlling the wavelength of ultraviolet light to be 400nm to obtain powder D for later use;
(5) vortex-centrifuge-vortex alternative treatment:
placing the powder D obtained in the step (4) into a vortex machine, then weighing 30 parts of ore aggregate, 9 parts of gypsum, 10 parts of slag and 50 parts of mixing water in corresponding parts by weight, sequentially placing the mixture into the vortex machine to carry out primary vortex treatment at 1400rpm for 20min, then placing the mixture into the centrifugal machine to carry out 10000rpm centrifugation for 24min, finally placing the mixture into the vortex machine to carry out secondary vortex treatment at 3600rpm for 40min, and obtaining a mixture for later use after the completion;
(6) and (3) preparing a finished product:
and (5) sequentially carrying out digestion, rolling, compression molding and high-pressure saturated steam curing on the mixture obtained in the step (5).
Example 4
A method for preparing high-strength steam bricks by using construction wastes comprises the following steps:
(1) sorting and crushing:
sorting the construction waste, and then placing the sorted construction waste into a crusher for primary crushing treatment to obtain powder A for later use;
(2) flame treatment:
carrying out flame treatment on the powder A obtained in the step (1) by using flame outer flame, controlling the distance between the powder B and the flame outer flame to be 0.25cm during the treatment, and carrying out flame treatment for 22min to obtain powder C for later use;
(3) and (3) crushing treatment:
weighing 34 parts of the powder C obtained in the step (2) and 65 parts of fly ash in corresponding parts by weight, putting the powder C and the fly ash into a pulverizer together for pulverization treatment, performing ultraviolet irradiation treatment while pulverizing, controlling the wavelength of ultraviolet light to be 300nm, and obtaining powder D for later use;
(4) vortex-centrifuge-vortex alternative treatment:
placing the powder D obtained in the step (3) into a vortex machine, then weighing 25 parts of ore aggregate, 7 parts of gypsum, 8 parts of slag and 40 parts of mixing water in corresponding parts by weight, sequentially placing the materials into the vortex machine to carry out primary vortex treatment for 15min at 1200rpm, then placing the materials into the centrifugal machine to carry out centrifugal treatment for 22min at 9000rpm, finally placing the materials into the vortex machine to carry out secondary vortex treatment for 35min at 3300rpm, and obtaining a mixture for later use after completion;
(5) and (3) preparing a finished product:
and (4) sequentially carrying out digestion, rolling, compression molding and high-pressure saturated steam curing on the mixture obtained in the step (4).
Example 5
A method for preparing high-strength steam bricks by using construction wastes comprises the following steps:
(1) sorting and crushing:
sorting the construction waste, and then placing the sorted construction waste into a crusher for primary crushing treatment to obtain powder A for later use;
(2) high-temperature high-pressure treatment:
immersing the powder A obtained in the step (1) into a treatment solution, then placing the treatment solution in which the powder A is immersed into a high-temperature pressure cooker, performing high-temperature and high-pressure treatment at 145 ℃ and 3MPa for 1.3h, filtering out and drying to obtain powder B for later use; the treating fluid comprises the following components in percentage by weight: 4.5% of calcium carbonate, 7.5% of sodium bicarbonate, 0.75% of alpha-bisabolol, 0.5% of beta-piperylene, 11% of sodium dodecyl benzene sulfonate and the balance of pure water;
(3) and (3) crushing treatment:
weighing 34 parts of the powder B obtained in the step (2) and 65 parts of fly ash in corresponding parts by weight, putting the powder B and the fly ash into a pulverizer together for pulverization treatment, performing ultraviolet irradiation treatment while pulverizing, controlling the wavelength of ultraviolet light to be 300nm, and obtaining powder D for later use;
(4) vortex-centrifuge-vortex alternative treatment:
placing the powder D obtained in the step (3) into a vortex machine, then weighing 25 parts of ore aggregate, 7 parts of gypsum, 8 parts of slag and 40 parts of mixing water in corresponding parts by weight, sequentially placing the materials into the vortex machine to carry out primary vortex treatment for 15min at 1200rpm, then placing the materials into the centrifugal machine to carry out centrifugal treatment for 22min at 9000rpm, finally placing the materials into the vortex machine to carry out secondary vortex treatment for 35min at 3300rpm, and obtaining a mixture for later use after completion;
(5) and (3) preparing a finished product:
and (4) sequentially carrying out digestion, rolling, compression molding and high-pressure saturated steam curing on the mixture obtained in the step (4).
Example 6
A method for preparing high-strength steam bricks by using construction wastes comprises the following steps:
(1) sorting and crushing:
sorting the construction waste, and then placing the sorted construction waste into a crusher for primary crushing treatment to obtain powder A for later use;
(2) high-temperature high-pressure treatment:
immersing the powder A obtained in the step (1) into a treatment solution, then placing the treatment solution in which the powder A is immersed into a high-temperature pressure cooker, performing high-temperature and high-pressure treatment at 145 ℃ and 3MPa for 1.3h, filtering out and drying to obtain powder B for later use; the treating fluid comprises the following components in percentage by weight: 4.5 percent of calcium carbonate, 7.5 percent of sodium bicarbonate, 0.75 percent of alpha-bisabolol, 0.5 percent of beta-piperonyl, 11 percent of sodium dodecyl benzene sulfonate and the balance of pure water
(3) Flame treatment:
carrying out flame treatment on the powder B obtained in the step (2) by using flame outer flame, wherein the distance between the powder B and the flame outer flame is controlled to be 0.25cm during the treatment, and the powder C is obtained for standby after the flame treatment for 22 min;
(4) and (3) crushing treatment:
weighing 34 parts by weight of the powder C obtained in the step (3) and 65 parts by weight of fly ash together, and placing the powder C and the fly ash into a pulverizer to perform pulverization treatment, thus obtaining powder D for later use;
(5) vortex-centrifuge-vortex alternative treatment:
placing the powder D obtained in the step (4) into a vortex machine, then weighing 25 parts of ore aggregate, 7 parts of gypsum, 8 parts of slag and 40 parts of mixing water in corresponding parts by weight, sequentially placing the materials into the vortex machine to carry out primary vortex treatment for 15min at 1200rpm, then placing the materials into the centrifugal machine to carry out centrifugal treatment for 22min at 9000rpm, finally placing the materials into the vortex machine to carry out secondary vortex treatment for 35min at 3300rpm, and obtaining a mixture for later use after completion;
(6) and (3) preparing a finished product:
and (5) sequentially carrying out digestion, rolling, compression molding and high-pressure saturated steam curing on the mixture obtained in the step (5).
Example 7
A method for preparing high-strength steam bricks by using construction wastes comprises the following steps:
(1) sorting and crushing:
sorting the construction waste, and then placing the sorted construction waste into a crusher for primary crushing treatment to obtain powder A for later use;
(2) high-temperature high-pressure treatment:
immersing the powder A obtained in the step (1) into a treatment solution, then placing the treatment solution in which the powder A is immersed into a high-temperature pressure cooker, performing high-temperature and high-pressure treatment at 145 ℃ and 3MPa for 1.3h, filtering out and drying to obtain powder B for later use; the treating fluid comprises the following components in percentage by weight: 4.5 percent of calcium carbonate, 7.5 percent of sodium bicarbonate, 0.75 percent of alpha-bisabolol, 0.5 percent of beta-piperonyl, 11 percent of sodium dodecyl benzene sulfonate and the balance of pure water
(3) Flame treatment:
carrying out flame treatment on the powder B obtained in the step (2) by using flame outer flame, wherein the distance between the powder B and the flame outer flame is controlled to be 0.25cm during the treatment, and the powder C is obtained for standby after the flame treatment for 22 min;
(4) and (3) crushing treatment:
weighing 34 parts of the powder C obtained in the step (3) and 65 parts of fly ash in corresponding parts by weight, putting the powder C and the fly ash into a pulverizer together for pulverization treatment, performing ultraviolet irradiation treatment while pulverizing, controlling the wavelength of ultraviolet light to be 300nm, and obtaining powder D for later use;
(5) stirring and uniformly mixing:
placing the powder D obtained in the step (4) into a stirrer, then weighing 25 parts of ore aggregate, 7 parts of gypsum, 8 parts of slag and 40 parts of mixing water in corresponding parts by weight, sequentially placing the materials into the stirrer, and stirring and uniformly mixing to obtain a mixture for later use;
(6) and (3) preparing a finished product:
and (5) sequentially carrying out digestion, rolling, compression molding and high-pressure saturated steam curing on the mixture obtained in the step (5).
In order to compare the technical effects of the application, the steam bricks are correspondingly prepared by the methods of the above embodiment 2 and embodiments 4-7, and then the compressive strength test is carried out by using a NYL-600 type pressure tester according to the GB/2542-. Each set of experiments was run in parallel with 6 replicates and the specific experimental comparison data is shown in table 1.
TABLE 1 comparative data of the compression strength test results of the steam bricks of the examples
| Compressive strength (MPa) | |
| Example 2 | 19.6 |
| Example 4 | 15.6 |
| Example 5 | 13.2 |
| Example 6 | 18.9 |
| Example 7 | 16.8 |
As can be seen from table 1 above, in comparison with example 2 in examples 4 to 7, the high-temperature and high-pressure treatment and the flame treatment of the construction waste and the processing treatment of the treated construction waste and other raw materials can both significantly enhance the compressive strength of the steam brick, and the whole preparation process is taken as a whole, and the whole preparation process is gradual and has synergistic enhancement effects.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention, and the present invention is not limited to the illustrated embodiments, and all the modifications and equivalents of the embodiments may be made without departing from the spirit of the present invention.
Claims (6)
1. A method for preparing a high-strength steam brick by using construction wastes is characterized by comprising the following steps:
(1) sorting and crushing:
sorting the construction waste, and then placing the sorted construction waste into a crusher for primary crushing treatment to obtain powder A for later use;
(2) high-temperature high-pressure treatment:
immersing the powder A obtained in the step (1) into a treatment solution, then placing the treatment solution in which the powder A is immersed into a high-temperature high-pressure pot, carrying out high-temperature high-pressure treatment, and filtering and drying after the treatment to obtain powder B for later use;
(3) flame treatment:
carrying out flame treatment on the powder B obtained in the step (2) by using flame outer flame to obtain powder C for later use;
(4) and (3) crushing treatment:
weighing 32-36 parts by weight of the powder C obtained in the step (3) and 60-70 parts by weight of fly ash together, placing the powder C and the fly ash into a pulverizer for pulverization, and performing ultraviolet irradiation treatment while pulverizing to obtain powder D for later use;
(5) vortex-centrifuge-vortex alternative treatment:
placing the powder D obtained in the step (4) into a vortex machine, then weighing 20-30 parts of ore aggregate, 5-9 parts of gypsum, 6-10 parts of slag and 30-50 parts of mixing water in corresponding parts by weight, sequentially placing the materials into the vortex machine for primary vortex treatment, placing the materials into a centrifugal machine for centrifugal treatment, finally placing the materials into the vortex machine for secondary vortex treatment, and obtaining a mixture for later use after the secondary vortex treatment is completed;
(6) and (3) preparing a finished product:
and (5) sequentially carrying out digestion, rolling, compression molding and high-pressure saturated steam curing on the mixture obtained in the step (5).
2. The method for preparing the high-strength steam brick by using the construction wastes as claimed in claim 1, wherein the treating fluid in the step (2) comprises the following components in percentage by weight: 4-5% of calcium carbonate, 6-9% of sodium bicarbonate, 0.6-0.9% of alpha-bisabolol, 0.4-0.6% of beta-limonene, 10-12% of sodium dodecyl benzene sulfonate and the balance of pure water.
3. The method for preparing high-strength steam bricks by using construction wastes as claimed in claim 1, wherein the technical parameters of the high-temperature high-pressure treatment in the step (2) are as follows: the temperature is 130-160 ℃, the pressure is 2-4 MPa, and the time is 1-1.6 h.
4. The method for preparing high-strength steam bricks by using construction wastes as claimed in claim 1, wherein the distance between the powder B and the flame outer flame is controlled to be 0.2-0.3 cm during the flame treatment in the step (3), and the flame treatment time is 20-24 min.
5. The method for preparing the high-strength steam brick from the construction waste according to claim 1, wherein the wavelength of the ultraviolet light is controlled to be 200-400 nm during the ultraviolet light irradiation treatment in the step (4).
6. The method for preparing high-strength steam bricks by using construction wastes as claimed in claim 1, wherein the primary vortex treatment in step (5) is performed at a vortex speed of 1000-1400 rpm for 10-20 min, the centrifugal treatment is performed at a rotation speed of 8000-10000 rpm for 20-24 min, and the secondary vortex treatment is performed at a speed of 3000-3600 rpm for 30-40 min.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114105606A (en) * | 2021-12-06 | 2022-03-01 | 安徽龙钰徽派古建工艺制品有限公司 | Preparation method of high-strength antique green tile |
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