CN111908876A - Production and processing method of high-strength autoclaved sand-lime brick - Google Patents
Production and processing method of high-strength autoclaved sand-lime brick Download PDFInfo
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- CN111908876A CN111908876A CN202010693764.9A CN202010693764A CN111908876A CN 111908876 A CN111908876 A CN 111908876A CN 202010693764 A CN202010693764 A CN 202010693764A CN 111908876 A CN111908876 A CN 111908876A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/10—Lime cements or magnesium oxide cements
- C04B28/12—Hydraulic lime
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/02—Selection of the hardening environment
- C04B40/024—Steam hardening, e.g. in an autoclave
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Abstract
The invention discloses a production and processing method of a high-strength autoclaved sand-lime brick, which comprises the following steps: preparing raw materials: the quick lime, the sand and the crushed stone comprise the following components in percentage by weight: 10-12% of quicklime, 80-90% of sand and 6-10% of crushed stone; raw material treatment: crushing quicklime and crushed stone chips, and grinding; preparing a mixture: weighing the processed raw materials and sand, placing the weighed raw materials and sand into a double-horizontal-shaft forced stirrer, adding water into the stirrer for primary stirring, putting the mixture subjected to primary stirring into a digestion bin for digestion, and then performing secondary stirring; and (3) pressing and forming: placing the mixture into a full-automatic hydraulic brick machine adopting double-sided pressurization for press forming, and standing and stacking the pressed green bricks; the invention has the beneficial effects that: the addition of the crushed stone chips facilitates resource recovery, and land occupation and environmental pollution caused by the accumulation of a large amount of crushed stone chips are reduced; the quality strength and the efficiency of the autoclaved sand-lime brick are improved.
Description
Technical Field
The invention belongs to the technical field of autoclaved sand-lime bricks, and particularly relates to a production and processing method of a high-strength autoclaved sand-lime brick.
Background
Steam-curing the autoclaved sand-lime brick to form a brick; the autoclaved sand-lime brick is prepared by taking sand and lime as main raw materials and performing blank preparation, press forming and autoclaved curing, and test results prove that the autoclaved sand-lime brick has good durability and high wall strength. Compared with other wall materials, the autoclaved sand-lime brick has remarkable heat storage capacity.
In order to facilitate resource recovery, reduce land occupation and environmental pollution and improve the quality and the processing efficiency of finished bricks, the method for producing and processing the high-strength autoclaved sand-lime brick is provided.
Disclosure of Invention
The invention aims to provide a production and processing method of high-strength autoclaved sand-lime bricks, which is convenient for resource recovery, reduces land occupation and environmental pollution, and improves the quality and processing efficiency of finished bricks.
In order to achieve the purpose, the invention provides the following technical scheme: a production and processing method of high-strength autoclaved sand-lime bricks comprises the following steps:
the method comprises the following steps: preparing raw materials: the quick lime, the sand and the crushed stone comprise the following components in percentage by weight: 10-12% of quicklime, 80-90% of sand and 6-10% of crushed stone;
step two: raw material treatment: crushing quicklime and crushed stone chips, and grinding;
step three: preparing a mixture: weighing the processed raw materials and sand, placing the weighed raw materials and sand into a double-horizontal-shaft forced stirrer, adding water into the stirrer for primary stirring, putting the mixture subjected to primary stirring into a digestion bin for digestion, and then performing secondary stirring;
step four: and (3) pressing and forming: placing the mixture into a full-automatic hydraulic brick machine adopting double-sided pressurization for press forming, and standing and stacking the pressed green bricks;
step five: steam pressing and storage yard: feeding into a still kettle for still pressing, cooling and discharging from the kettle.
As a preferable technical scheme of the invention, the sand is one or more of river sand, sea sand, aeolian sand, sediment sand and tailing sand.
In the third step, the processed raw materials and sand are weighed and placed in a double horizontal shaft forced stirrer, and 6-9% of water of the raw materials is added for first stirring.
As a preferable technical scheme of the invention, the time for the first stirring is 1.5-2.5 min.
In the third step, the mixture stirred for the first time is put into a digestion bin to be digested for 2 to 3 hours, and then the mixture is stirred for the second time.
In the fourth step, the pressed green bricks are subjected to standing stacking, and the standing stacking time is 2-3 h.
As a preferable technical solution of the present invention, in the fifth step, the steam pressure condition is: a temperature rising stage: heating for 1.5-2 h; and (3) a constant temperature and pressure stage: keeping the temperature for 4-7h under the pressure of 0.9-1.4 MPa; and (3) cooling: the temperature is 160 ℃ and 180 ℃, and the temperature is reduced for 1.5-2 h.
Compared with the prior art, the invention has the beneficial effects that:
(1) the addition of the crushed stone chips facilitates resource recovery, and land occupation and environmental pollution caused by the accumulation of a large amount of crushed stone chips are reduced;
(2) improves the quality strength and the processing efficiency of the autoclaved sand-lime brick.
Drawings
FIG. 1 is a production process diagram 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.
Example 1
Referring to fig. 1, the present invention provides a technical solution: a production and processing method of high-strength autoclaved sand-lime bricks comprises the following steps:
the method comprises the following steps: preparing raw materials: the quick lime, the sand and the crushed stone comprise the following components in percentage by weight: 10% of quicklime, 80% of sand and 10% of crushed stone; the sand is one or more of river sand, sea sand, aeolian sand, sediment sand and tailing sand; the addition of the crushed stone chips facilitates resource recovery, and land occupation and environmental pollution caused by the accumulation of a large amount of crushed stone chips are reduced;
step two: raw material treatment: crushing quicklime and crushed stone chips, and then grinding to reach the fineness required by the production process;
step three: preparing a mixture: weighing the processed raw materials and sand, placing the weighed raw materials and sand into a double-horizontal-shaft forced stirrer, adding 6% of water into the raw materials, stirring for the first time, wherein the stirring time is 1.5min, putting the mixture subjected to the first stirring into a digestion bin, digesting for 2h, and then stirring for the second time; the primary stirring aims at mutually dispersing all components of the mixture, increasing the contact area, uniformly mixing the materials and enhancing the chemical adsorption effect; moreover, the water film can be coated on the surface of the solid-phase particles by stirring, so that the water is uniformly distributed in the stirred material, the lime can be more fully digested, the workability of the mixture is improved, the plasticity is improved, and the forming performance and the physical performance of the product are improved; in order to fully digest lime, heating and stirring can be used in severe cold seasons; adding water for the second time for stirring, and aiming at: on one hand, after digestion, partial water is evaporated to reduce the water content of the mixture by 3 percent, and in order to facilitate forming, water is added for the second time and stirring is carried out; on the other hand, the secondary stirring can break up the agglomerated materials, so that the materials are more uniform and have better plasticity, and the molding and the product performance improvement are facilitated;
step four: and (3) pressing and forming: placing the mixture into a full-automatic hydraulic brick machine adopting double-sided pressurization for compression molding, and standing and stacking the pressed green bricks for 2 hours; the double-sided pressurization is adopted to facilitate the discharge of air in the blank, thereby improving the quality of the finished brick; the purpose of standing and stacking is to evaporate part of the excess moisture in the green brick and prevent the green brick from cracking due to the expansion of the moisture when the temperature is raised; secondly, the strength of the green brick can be increased, thereby improving the strength of the product; thirdly, the mixture which is not completely digested is subjected to continuous digestion, so that the phenomenon that the product is cracked due to rapid slaking expansion of lime caused by the rising of the curing temperature in the steam-pressing process is avoided;
step five: steam pressing and storage yard: feeding the mixture into an autoclave for autoclaving, wherein the autoclaving conditions are as follows: a temperature rising stage: heating for 1.5 h; and (3) a constant temperature and pressure stage: keeping the temperature for 4 hours under the pressure of 0.9 MPa; and (3) cooling: the temperature is 160 ℃, the temperature is reduced for 1.5h, and the mixture is taken out of the kettle after being cooled.
Example 2
Referring to fig. 1, the present invention provides a technical solution: a production and processing method of high-strength autoclaved sand-lime bricks comprises the following steps:
the method comprises the following steps: preparing raw materials: the quick lime, the sand and the crushed stone comprise the following components in percentage by weight: 11% of quicklime, 81% of sand and 8% of crushed stone; the sand is one or more of river sand, sea sand, aeolian sand, sediment sand and tailing sand; the addition of the crushed stone chips facilitates resource recovery, and land occupation and environmental pollution caused by the accumulation of a large amount of crushed stone chips are reduced;
step two: raw material treatment: crushing quicklime and crushed stone chips, and then grinding to reach the fineness required by the production process;
step three: preparing a mixture: weighing the processed raw materials and sand, placing the weighed raw materials and sand into a double-horizontal-shaft forced stirrer, adding 8% of water into the raw materials, stirring for the first time, wherein the stirring time is 2.0min, putting the mixture subjected to the first stirring into a digestion bin, digesting for 2.5h, and then stirring for the second time; the primary stirring aims at mutually dispersing all components of the mixture, increasing the contact area, uniformly mixing the materials and enhancing the chemical adsorption effect; moreover, the water film can be coated on the surface of the solid-phase particles by stirring, so that the water is uniformly distributed in the stirred material, the lime can be more fully digested, the workability of the mixture is improved, the plasticity is improved, and the forming performance and the physical performance of the product are improved; in order to fully digest lime, heating and stirring can be used in severe cold seasons; adding water for the second time for stirring, and aiming at: on one hand, after digestion, partial water is evaporated to reduce the water content of the mixture by 3 percent, and in order to facilitate forming, water is added for the second time and stirring is carried out; on the other hand, the secondary stirring can break up the agglomerated materials, so that the materials are more uniform and have better plasticity, and the molding and the product performance improvement are facilitated;
step four: and (3) pressing and forming: placing the mixture into a full-automatic hydraulic brick machine adopting double-sided pressurization for compression molding, and standing and stacking the pressed green bricks for 2.5 hours; the double-sided pressurization is adopted to facilitate the discharge of air in the blank, thereby improving the quality of the finished brick; the purpose of standing and stacking is to evaporate part of the excess moisture in the green brick and prevent the green brick from cracking due to the expansion of the moisture when the temperature is raised; secondly, the strength of the green brick can be increased, thereby improving the strength of the product; thirdly, the mixture which is not completely digested is subjected to continuous digestion, so that the phenomenon that the product is cracked due to rapid slaking expansion of lime caused by the rising of the curing temperature in the steam-pressing process is avoided;
step five: steam pressing and storage yard: feeding the mixture into an autoclave for autoclaving, wherein the autoclaving conditions are as follows: a temperature rising stage: heating for 1.8 h; and (3) a constant temperature and pressure stage: the pressure is 1.2MPa, and the constant temperature is 5.5 h; and (3) cooling: the temperature is 170 ℃, the temperature is reduced for 1.8h, and the mixture is taken out of the kettle after being cooled.
Example 3
Referring to fig. 1, the present invention provides a technical solution: a production and processing method of high-strength autoclaved sand-lime bricks comprises the following steps:
the method comprises the following steps: preparing raw materials: the quick lime, the sand and the crushed stone comprise the following components in percentage by weight: 12% of quicklime, 82% of sand and 6% of crushed stone; the sand is one or more of river sand, sea sand, aeolian sand, sediment sand and tailing sand; the addition of the crushed stone chips facilitates resource recovery, and land occupation and environmental pollution caused by the accumulation of a large amount of crushed stone chips are reduced;
step two: raw material treatment: crushing quicklime and crushed stone chips, and then grinding to reach the fineness required by the production process;
step three: preparing a mixture: weighing the processed raw materials and sand, placing the weighed raw materials and sand into a double-horizontal-shaft forced stirrer, adding 9% of water into the raw materials, stirring for the first time, wherein the stirring time is 2.5min, putting the mixture subjected to the first stirring into a digestion bin, digesting for 3h, and then stirring for the second time; the primary stirring aims at mutually dispersing all components of the mixture, increasing the contact area, uniformly mixing the materials and enhancing the chemical adsorption effect; moreover, the water film can be coated on the surface of the solid-phase particles by stirring, so that the water is uniformly distributed in the stirred material, the lime can be more fully digested, the workability of the mixture is improved, the plasticity is improved, and the forming performance and the physical performance of the product are improved; in order to fully digest lime, heating and stirring can be used in severe cold seasons; adding water for the second time for stirring, and aiming at: on one hand, after digestion, partial water is evaporated to reduce the water content of the mixture by 4 percent, and in order to facilitate forming, water is added for the second time and stirring is carried out; on the other hand, the secondary stirring can break up the agglomerated materials, so that the materials are more uniform and have better plasticity, and the molding and the product performance improvement are facilitated;
step four: and (3) pressing and forming: placing the mixture into a full-automatic hydraulic brick machine adopting double-sided pressurization for compression molding, and standing and stacking the pressed green bricks for 3 hours; the double-sided pressurization is adopted to facilitate the discharge of air in the blank, thereby improving the quality of the finished brick; the purpose of standing and stacking is to evaporate part of the excess moisture in the green brick and prevent the green brick from cracking due to the expansion of the moisture when the temperature is raised; secondly, the strength of the green brick can be increased, thereby improving the strength of the product; thirdly, the mixture which is not completely digested is subjected to continuous digestion, so that the phenomenon that the product is cracked due to rapid slaking expansion of lime caused by the rising of the curing temperature in the steam-pressing process is avoided;
step five: steam pressing and storage yard: feeding the mixture into an autoclave for autoclaving, wherein the autoclaving conditions are as follows: a temperature rising stage: heating for 2 h; and (3) a constant temperature and pressure stage: keeping the temperature for 7 hours under the pressure of 1.4 MPa; and (3) cooling: the temperature is 180 ℃, the temperature is reduced for 2 hours, and the mixture is taken out of the kettle after being cooled.
Raw material proportioning table of different embodiments
| Quick lime | Sand | Crushed stone | |
| Example 1 | 10％ | 80％ | 10％ |
| Example 2 | 11％ | 81％ | 8％ |
| Example 3 | 12％ | 82％ | 6％ |
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 (7)
1. A production and processing method of high-strength autoclaved sand-lime bricks is characterized by comprising the following steps: the production and processing method comprises the following steps:
the method comprises the following steps: preparing raw materials: the quick lime, the sand and the crushed stone comprise the following components in percentage by weight: 10-12% of quicklime, 80-90% of sand and 6-10% of crushed stone;
step two: raw material treatment: crushing quicklime and crushed stone chips, and grinding;
step three: preparing a mixture: weighing the processed raw materials and sand, placing the weighed raw materials and sand into a double-horizontal-shaft forced stirrer, adding water into the stirrer for primary stirring, putting the mixture subjected to primary stirring into a digestion bin for digestion, and then performing secondary stirring;
step four: and (3) pressing and forming: placing the mixture into a full-automatic hydraulic brick machine adopting double-sided pressurization for press forming, and standing and stacking the pressed green bricks;
step five: steam pressing and storage yard: feeding into a still kettle for still pressing, cooling and discharging from the kettle.
2. The production and processing method of the high-strength autoclaved sand-lime brick according to claim 1, characterized by comprising the following steps: the sand is one or more of river sand, sea sand, aeolian sand, sediment sand and tailing sand.
3. The production and processing method of the high-strength autoclaved sand-lime brick according to claim 1, characterized by comprising the following steps: and in the third step, the processed raw materials and the sand are weighed and placed in a double-horizontal-shaft forced stirrer, and 6-9% of water of the raw materials is added for primary stirring.
4. The production and processing method of the high-strength autoclaved sand-lime brick according to claim 3, characterized by comprising the following steps: the time for the first stirring is 1.5-2.5 min.
5. The production and processing method of the high-strength autoclaved sand-lime brick according to claim 1, characterized by comprising the following steps: in the third step, the mixture stirred for the first time is put into a digestion bin to be digested for 2 to 3 hours, and then the mixture is stirred for the second time.
6. The production and processing method of the high-strength autoclaved sand-lime brick according to claim 1, characterized by comprising the following steps: and in the fourth step, the pressed green bricks are subjected to standing stacking, and the standing stacking time is 2-3 h.
7. The production and processing method of the high-strength autoclaved sand-lime brick according to claim 1, characterized by comprising the following steps: in the fifth step, the steam pressure conditions are as follows: a temperature rising stage: heating for 1.5-2 h; and (3) a constant temperature and pressure stage: keeping the temperature for 4-7h under the pressure of 0.9-1.4 MPa; and (3) cooling: the temperature is 160 ℃ and 180 ℃, and the temperature is reduced for 1.5-2 h.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113213886A (en) * | 2021-05-12 | 2021-08-06 | 中北大学 | Fly ash autoclaved environment-friendly brick and preparation method thereof |
| CN113248220A (en) * | 2021-06-02 | 2021-08-13 | 石河子大学 | Autoclaved brick based on desert sand and preparation method thereof |
| CN113816706A (en) * | 2021-09-29 | 2021-12-21 | 文昌鑫泰新型建材有限公司 | Autoclaved sand-lime brick taking waste residues and waste materials as raw materials and preparation method thereof |
| CN115925382A (en) * | 2023-01-05 | 2023-04-07 | 安徽省润乾节能建材科技股份有限公司 | Preparation method of porous autoclaved sand brick |
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| CN104098312A (en) * | 2013-04-10 | 2014-10-15 | 黄冈市桐铠建材有限公司 | Autoclaved lime sand brick and production method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113213886A (en) * | 2021-05-12 | 2021-08-06 | 中北大学 | Fly ash autoclaved environment-friendly brick and preparation method thereof |
| CN113248220A (en) * | 2021-06-02 | 2021-08-13 | 石河子大学 | Autoclaved brick based on desert sand and preparation method thereof |
| CN113816706A (en) * | 2021-09-29 | 2021-12-21 | 文昌鑫泰新型建材有限公司 | Autoclaved sand-lime brick taking waste residues and waste materials as raw materials and preparation method thereof |
| CN115925382A (en) * | 2023-01-05 | 2023-04-07 | 安徽省润乾节能建材科技股份有限公司 | Preparation method of porous autoclaved sand brick |
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Application publication date: 20201110 |