CN113831096A - Energy-saving high-strength autoclaved sand-lime brick production and processing method - Google Patents

Energy-saving high-strength autoclaved sand-lime brick production and processing method Download PDF

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Publication number
CN113831096A
CN113831096A CN202111147875.0A CN202111147875A CN113831096A CN 113831096 A CN113831096 A CN 113831096A CN 202111147875 A CN202111147875 A CN 202111147875A CN 113831096 A CN113831096 A CN 113831096A
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energy
lime
lime brick
sand
autoclaved sand
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CN202111147875.0A
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Chinese (zh)
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黄述宝
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Wenchang Xintai New Building Materials Co ltd
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Wenchang Xintai New Building Materials Co ltd
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    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02Compositions 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
    • C04B28/10Lime cements or magnesium oxide cements
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B14/00Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/02Granular materials, e.g. microballoons
    • C04B14/04Silica-rich materials; Silicates
    • C04B14/22Glass ; Devitrified glass
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B24/00Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/24Macromolecular compounds
    • C04B24/26Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C04B24/2652Nitrogen containing polymers, e.g. polyacrylamides, polyacrylonitriles
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B40/00Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
    • C04B40/02Selection of the hardening environment
    • C04B40/024Steam hardening, e.g. in an autoclave

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Civil Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

The invention relates to the technical field of building materials, and discloses a production and processing method of an energy-saving high-strength autoclaved sand-lime brick, which comprises the following raw materials in percentage by mass: 20-30% of natural sand, 20-30% of glass fragments, 20-40% of quicklime, 20-40% of fly ash and 5-15% of super absorbent resin particles. According to the production and processing method of the energy-saving high-strength autoclaved sand-lime brick, the glass scraps are doped in the raw materials to serve as siliceous materials, so that the autoclaved sand-lime brick can be produced by utilizing the glass scraps, resources can be saved, the pollution of the glass scraps to the environment can be reduced, and the purposes of energy saving and high strength can be achieved; meanwhile, the super absorbent resin is added into the raw materials, so that the curing time is shortened, and the production efficiency is improved.

Description

Energy-saving high-strength autoclaved sand-lime brick production and processing method
Technical Field
The invention relates to the technical field of building materials, in particular to a production and processing method of an energy-saving high-strength autoclaved sand-lime brick.
Background
The autoclaved sand-lime brick is a common sand-lime brick which is prepared by using sand and lime as main raw materials, allowing pigment and additives to be doped, preparing blanks, performing compression molding and performing high-pressure steam curing. The lime-sand brick is a novel building material with mature technology, excellent performance and energy conservation, and is suitable for bearing walls of multi-layer mixed structure buildings. However, the autoclaved sand-lime brick has the defects of unstable shrinkage, large shrinkage within 3 days of discharging, gradual stabilization until 60 days later, easy re-shrinkage due to different environmental temperatures and humidity, easy cracking and needing some anti-cracking measures when in use.
The prior art has the following defects and shortcomings:
the existing sand-lime brick is easy to weather, the use strength of the existing sand-lime brick is reduced, the service life of the existing sand-lime brick is limited, and in order to recover resources, reduce land occupation and environmental pollution and improve the quality and the processing efficiency of a finished brick, an energy-saving high-strength steam-pressing sand-lime brick production processing method is provided.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a production and processing method of an energy-saving high-strength autoclaved sand-lime brick, which can solve the problems that the existing sand-lime brick is easy to weather, the service strength of the existing sand-lime brick is reduced, the service life of the existing sand-lime brick is limited, and the existing sand-lime brick is not energy-saving and environment-friendly enough; according to the invention, by adopting the energy-saving high-strength autoclaved sand-lime brick production processing method, the glass scraps are added into the raw materials to produce the autoclaved sand-lime brick, so that the resources can be saved, the pollution of the glass scraps to the environment can be reduced, the strength of the autoclaved sand-lime brick can be improved, and the autoclaved sand-lime brick has good economic and social benefits.
In order to achieve the purpose of the production and processing method of the energy-saving high-strength autoclaved sand-lime brick, the invention provides the following technical scheme: an energy-saving high-strength autoclaved sand-lime brick production and processing method comprises the following raw materials (by mass percent): 20-30% of natural sand, 20-30% of glass fragments, 20-40% of quicklime, 20-40% of fly ash and 5-15% of super absorbent resin particles.
Further, the preparation method of the autoclaved sand-lime brick comprises the following steps:
feeding 20-30% of natural sand, 20-40% of quicklime and 20-40% of fly ash into a jaw crusher for crushing, then feeding the crushed materials into a coarse lime bin by a lifter, feeding the crushed materials into a dry ball mill by an impeller feeder for grinding, feeding the ground materials into a fine lime bin by a bucket lifter, and metering the ground materials by a lime metering hopper;
grinding 20-30% of the glass scraps by using a grinding wheel to obtain powder, sieving and metering the powder, mixing the powder with the raw materials and 5-15% of the super absorbent resin particles according to the specified mixing ratio, adding a proper amount of water, stirring the mixture into a uniform mixture, adding water, stirring the mixture for the first time, digesting the mixture by adding water for the second time, and finally feeding the mixture into a hydraulic brick machine to press the mixture into blocks;
step three, standing and digesting the blocky mixture in the step two at room temperature for 1-2 hours;
step four, putting the blocky mixture obtained in the step three into an autoclave for curing, carrying out high-pressure steam curing, taking the blocky mixture out of the autoclave after the high-pressure steam curing, carrying out constant-temperature autoclaving for 4-10 hours, then reducing the autoclaving temperature to 120 ℃, carrying out constant-temperature atmospheric autoclaving for 1 hour, and then reducing the temperature to 100 ℃, and carrying out constant-temperature atmospheric autoclaving for 1 hour again;
and fifthly, naturally maintaining.
Preferably, the granularity of the raw material sent into the jaw crusher for crushing in the step one is 30-85 mm, the raw material is ground to a 80um hole sieve by a dry ball mill, and the sieve residue is 10-20%.
Preferably, the super absorbent resin in the second step is polyacrylamide.
Preferably, SiO in the glass cullet in step two2More than or equal to 65 percent.
Preferably, in the step two, the raw materials are mixed and added with water according to the specified requirements of the mixing ratio, and the total added water amount is 9 to 12 percent of the dry powder of the raw materials.
Preferably, the high-pressure steam curing in the fourth step is carried out, wherein the temperature of the steam is 170-200 ℃, the pressure of the steam is 1.0-1.6 MPa, and the constant-temperature steam-pressing time is 4-10 h.
Preferably, the natural curing time in the fifth step is 25-30 days.
Compared with the prior art, the invention provides a production and processing method of an energy-saving high-strength autoclaved sand-lime brick, which has the following beneficial effects:
when the autoclaved sand-lime brick is produced, natural sand is generally adopted as siliceous materials, the glass scraps are wastes of the glass product processing industry, and SiO in the glass scraps265% -75%, the energy-saving high-strength autoclaved sand-lime brick is produced by doping glass scraps into raw materials as siliceous materials, mixing and digesting the siliceous materials with materials such as lime, gypsum and the like, and then carrying out high-temperature high-pressure steam reaction on the siliceous materialsSiO in glass cullet2And Ca (OH)2The hydrothermal synthesis reaction is carried out to generate the crystal mineral-tobermorite with higher strength, and the method can utilize the glass scraps to produce the autoclaved sand-lime brick, thereby saving resources, reducing the pollution of the glass scraps to the environment and achieving the purposes of energy conservation and high strength; meanwhile, the super absorbent resin is added into the raw materials, so that the water absorption of the autoclaved sand-lime brick is increased, the brittleness of the autoclaved sand-lime brick is reduced, the autoclaved sand-lime brick can be quickly gelatinized, the gelling speed of a product is increased, the curing time is shortened, the production efficiency is improved, the autoclaved sand-lime brick is digested before autoclaving, and the condition that the autoclaved sand-lime brick cracks in the autoclaving process can be avoided.
Drawings
FIG. 1 is a schematic process flow diagram of the preparation method of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a method for producing and processing an energy-saving high-strength autoclaved sand-lime brick comprises the following raw materials (by mass): 20-30% of natural sand, 20-30% of glass fragments, 20-40% of quicklime, 20-40% of fly ash and 5-15% of super absorbent resin particles.
To sum up, the following embodiment one is given: the preparation method of the autoclaved sand-lime brick comprises the following steps:
s1, feeding 20% of natural sand, 20% of quicklime and 20% of fly ash into a jaw crusher to be crushed, feeding the crushed raw materials into a coarse lime bin by a lifter, providing the crushed raw materials for a dry ball mill to be ground by an impeller feeder, grinding the crushed raw materials to 80-micrometer hole sieve with the screen residue of 10%, feeding the ground raw materials into a fine lime bin by a bucket elevator, and metering the ground raw materials by a lime metering hopper;
s2, grinding 20% of the glass fragments into powder by a grinding wheel, sieving, metering, mixing with the raw materials and 5% of the super absorbent resin particles according to the specified mixing ratio, adding a proper amount of water, stirring into a uniform mixture, adding water, stirring for the first time, adding water, stirring for the second time, and finally feeding the mixture into a hydraulic brick machine to press into blocks; the total water addition amount is 9 percent of the raw material dry powder;
s3, standing and digesting the blocky mixture in the step II at room temperature for 1-2 h;
s4, putting the blocky mixture obtained in the third step into an autoclave for curing, and performing high-pressure steam curing, wherein the temperature of steam is 170 ℃, the pressure of the steam is 1.0MPa, the constant-temperature steaming time is 4 hours, the blocky mixture is taken out of the autoclave for constant-temperature steaming and pressing for 4 hours after the high-pressure steam curing, then the steaming and pressing temperature is reduced to 120 ℃, the constant-temperature steaming and pressing for 1 hour under constant temperature and pressure, and then the temperature is reduced to 100 ℃, and the constant-temperature steaming and pressing for 1 hour under constant pressure again;
and S5, naturally curing for 25 days.
The following example II is given: the preparation method of the autoclaved sand-lime brick comprises the following steps:
s1, feeding 25% of natural sand, 25% of quicklime and 30% of fly ash into a jaw crusher to be crushed, feeding the crushed raw materials into a coarse lime bin by a lifter, feeding the crushed raw materials into a dry ball mill by an impeller feeder to be ground, grinding the raw materials to 80-micrometer hole sieve with the screen residue of 15%, feeding the ground raw materials into a fine lime bin by a bucket elevator, and metering the ground raw materials by a lime metering hopper;
s2, grinding 25% of glass fragments into powder by a grinding wheel, sieving, metering, mixing with the raw materials and 10% of super absorbent resin particles according to the specified mixing ratio, adding a proper amount of water, stirring into a uniform mixture, adding water, stirring for the first time, adding water for the second time, stirring, and finally feeding the mixture into a hydraulic brick machine to be pressed into blocks; the total water addition amount is 10 percent of the raw material dry powder;
s3, standing and digesting the blocky mixture in the step II at room temperature for 1-2 h;
s4, putting the blocky mixture obtained in the third step into an autoclave for curing, and performing high-pressure steam curing, wherein the temperature of steam is 185 ℃, the pressure of the steam is 1.3MPa, the constant-temperature steaming time is 7 hours, the blocky mixture is taken out of the autoclave after the high-pressure steam curing and is autoclaved for 7 hours at constant temperature, then the steaming temperature is reduced to 120 ℃, the constant-temperature and normal-pressure steaming is performed for 1 hour, and then the temperature is reduced to 100 ℃, and the constant-temperature and normal-pressure steaming is performed for 1 hour again;
and S5, naturally curing for 28 days.
The following gives a third embodiment: the preparation method of the autoclaved sand-lime brick comprises the following steps:
s1, feeding 30% of natural sand, 40% of quicklime and 40% of fly ash into a jaw crusher to be crushed, feeding the crushed raw materials into a coarse lime bin by a lifter, providing the crushed raw materials for a dry ball mill to be ground by an impeller feeder, grinding the crushed raw materials to 80-micrometer hole sieve with 20% screen residue, feeding the ground raw materials into a fine lime bin by a bucket elevator, and metering the ground raw materials by a lime metering hopper;
s2, grinding 30% of glass fragments into powder by a grinding wheel, sieving, metering, mixing with the raw materials and 15% of super absorbent resin particles according to the specified mixing ratio, adding a proper amount of water, stirring into a uniform mixture, adding water, stirring for the first time, digesting, adding water, stirring for the second time, and finally feeding the mixture into a hydraulic brick machine to press into blocks; the total water addition amount is 12 percent of the raw material dry powder;
s3, standing and digesting the blocky mixture in the step II at room temperature for 1-2 h;
s4, putting the blocky mixture obtained in the third step into an autoclave for curing, and performing high-pressure steam curing, wherein the temperature of steam is 200 ℃, the pressure of the steam is 1.6MPa, the constant-temperature steaming time is 10 hours, the blocky mixture is taken out of the autoclave after the high-pressure steam curing and then is autoclaved at constant temperature for 10 hours, then the steaming temperature is reduced to 120 ℃, the constant-temperature and normal-pressure steaming is performed for 1 hour, and then the temperature is reduced to 100 ℃, and the constant-temperature and normal-pressure steaming is performed for 1 hour again;
and S5, naturally curing for 30 days.
The working and using process and the installation method of the invention are that when the production and processing method of the energy-saving high-strength autoclaved sand-lime brick is used, the raw materials are doped with the glass fragments as siliceous materials, and after the siliceous materials are mixed and digested with materials such as lime, gypsum and the like, under the action of high-temperature and high-pressure water vapor, SiO in the glass fragments2And Ca (OH)2Hydrothermal synthesis reaction is carried out to generate the product with higher strengthThe method can utilize the glass fragments to produce the autoclaved sand-lime brick, so that the resources can be saved, the pollution of the glass fragments to the environment can be reduced, and the purposes of energy conservation and high strength can be achieved; meanwhile, the super absorbent resin is added into the raw materials, so that the water absorption of the autoclaved sand-lime brick is increased, the brittleness of the autoclaved sand-lime brick is reduced, the autoclaved sand-lime brick can be quickly gelatinized, the gelling speed of a product is increased, the curing time is shortened, the production efficiency is improved, the autoclaved sand-lime brick is digested before autoclaving, and the condition that the autoclaved sand-lime brick cracks in the autoclaving process can be avoided.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (8)

1. The production and processing method of the energy-saving high-strength autoclaved sand-lime brick is characterized by comprising the following steps of: the autoclaved sand-lime brick comprises the following raw materials (by mass): 20-30% of natural sand, 20-30% of glass fragments, 20-40% of quicklime, 20-40% of fly ash and 5-15% of super absorbent resin particles.
2. The production and processing method of the energy-saving high-strength autoclaved sand-lime brick according to claim 1, which is characterized in that: the preparation method of the autoclaved sand-lime brick comprises the following steps:
feeding 20-30% of natural sand, 20-40% of quicklime and 20-40% of fly ash into a jaw crusher for crushing, then feeding the crushed materials into a coarse lime bin by a lifter, feeding the crushed materials into a dry ball mill by an impeller feeder for grinding, feeding the ground materials into a fine lime bin by a bucket lifter, and metering the ground materials by a lime metering hopper;
grinding 20-30% of the glass scraps by using a grinding wheel to obtain powder, sieving and metering the powder, mixing the powder with the raw materials and 5-15% of the super absorbent resin particles according to the specified mixing ratio, adding a proper amount of water, stirring the mixture into a uniform mixture, adding water, stirring the mixture for the first time, digesting the mixture by adding water for the second time, and finally feeding the mixture into a hydraulic brick machine to press the mixture into blocks;
step three, standing and digesting the blocky mixture in the step two at room temperature for 1-2 hours;
step four, putting the blocky mixture obtained in the step three into an autoclave for curing, carrying out high-pressure steam curing, taking the blocky mixture out of the autoclave after the high-pressure steam curing, carrying out constant-temperature autoclaving for 4-10 hours, then reducing the autoclaving temperature to 120 ℃, carrying out constant-temperature atmospheric autoclaving for 1 hour, and then reducing the temperature to 100 ℃, and carrying out constant-temperature atmospheric autoclaving for 1 hour again;
and fifthly, naturally maintaining.
3. The method for producing and processing the energy-saving high-strength autoclaved sand-lime brick according to the step one of the claim 2, which is characterized in that: the granularity of the raw material sent into the jaw crusher for crushing is 30-85 mm, the raw material is ground to 80um hole sieve by a dry ball mill, and the screen residue is 10-20%.
4. The energy-saving high-strength autoclaved sand-lime brick production and processing method according to the step two of claim 2, which is characterized in that: the high water absorption resin is polyacrylamide.
5. The energy-saving high-strength autoclaved sand-lime brick production and processing method according to the step two of claim 2, which is characterized in that: SiO in the glass scraps2More than or equal to 65 percent.
6. The energy-saving high-strength autoclaved sand-lime brick production and processing method according to the step two of claim 2, which is characterized in that: the raw materials are mixed and added with water according to the specified requirements of the mixing proportion, and the total added water amount is 9-12% of the raw material dry powder.
7. The production and processing method of the energy-saving high-strength autoclaved sand-lime brick according to the fourth step of claim 2, which is characterized in that: and (3) curing by using high-pressure steam, wherein the temperature of the steam is 170-200 ℃, the pressure of the steam is 1.0-1.6 MPa, and the constant-temperature steaming time is 4-10 h.
8. The production and processing method of the energy-saving high-strength autoclaved sand-lime brick according to the fifth step of claim 2, which is characterized in that: and the natural curing time is 25-30 days.
CN202111147875.0A 2021-09-29 2021-09-29 Energy-saving high-strength autoclaved sand-lime brick production and processing method Pending CN113831096A (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010125024A1 (en) * 2009-04-27 2010-11-04 Basf Se Organic-inorganic composite particles
CN103848613A (en) * 2012-12-06 2014-06-11 蒋元海 Method for producing autoclaved sand-lime bricks by utilizing glass chippings
CN113045279A (en) * 2021-02-26 2021-06-29 海南广胜新型建材有限公司 Autoclaved sand-lime brick and preparation method thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010125024A1 (en) * 2009-04-27 2010-11-04 Basf Se Organic-inorganic composite particles
CN103848613A (en) * 2012-12-06 2014-06-11 蒋元海 Method for producing autoclaved sand-lime bricks by utilizing glass chippings
CN113045279A (en) * 2021-02-26 2021-06-29 海南广胜新型建材有限公司 Autoclaved sand-lime brick and preparation method thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
朱敏聪等: "利用矿山尾矿制作蒸压砖的试验研究", 《新型建筑材料》 *

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Application publication date: 20211224