CN111004015A - Gangue sintered porous insulating brick - Google Patents
Gangue sintered porous insulating brick Download PDFInfo
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- CN111004015A CN111004015A CN201911386594.3A CN201911386594A CN111004015A CN 111004015 A CN111004015 A CN 111004015A CN 201911386594 A CN201911386594 A CN 201911386594A CN 111004015 A CN111004015 A CN 111004015A
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- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
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- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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Abstract
The invention provides a coal gangue sintered porous heat-insulating brick, which comprises the following components in parts by weight: 50-65 parts of coal gangue, 15-25 parts of expanded and vitrified micro bubbles, 5-15 parts of polycrystalline mullite fiber, 4-6 parts of bauxite, 20-35 parts of river silt, 8-15 parts of hardening modifier and 5-7 parts of acid-resistant auxiliary agent, the porous brick fired by adopting the invention adopts the expanded and vitrified micro bubbles, has the advantages of light weight, small water absorption rate, small dry shrinkage and the like, and then the polycrystalline mullite fiber is added, so that the effects of heat preservation and heat insulation are realized, and the preparation process is simple; energy conservation and emission reduction, environmental pollution prevention, and ecological environmental protection.
Description
Technical Field
The invention belongs to the technical field of gangue bricks, and particularly relates to a gangue sintered porous heat-insulating brick.
Background
The production cost of the coal gangue brick is lower than that of the common clay brick, the strength of the coal gangue brick is higher than that of the common clay brick, the coal gangue brick is used for making the brick, not only the land is saved, but also the waste materials of the mine are consumed, and the coal gangue brick is a low-carbon building material which is beneficial to environmental protection. With the continuous deepening of the reform open policy, the continuous development of market economy, the rapid development of urban construction, various municipal works, public facilities, high-rise buildings, civil buildings and settlement projects, a large amount of novel wall materials are needed, gangue bricks are main new wall materials, although the hardness of the gangue bricks is about twice of that of common clay bricks, in the actual urban construction, the requirements of some buildings on the wall bodies are higher and higher, and therefore, the heat insulation performance of the common gangue bricks cannot meet the actual requirements.
Disclosure of Invention
The invention aims to provide a gangue sintered porous insulating brick, which solves the problems of the gangue sintered porous insulating brick in the background technology.
The technical scheme of the invention is realized as follows:
a coal gangue sintered porous insulating brick comprises the following components in parts by weight: 50-65 parts of coal gangue, 15-25 parts of expanded and vitrified micro-beads, 5-15 parts of polycrystalline mullite fiber, 4-6 parts of bauxite, 20-35 parts of river silt, 8-15 parts of hardening modifier and 5-7 parts of acid-resistant auxiliary agent.
Preferably, the coal gangue sintered porous heat-insulating brick comprises the following components in parts by weight: 55 parts of coal gangue, 18 parts of expanded vitrified micro bubbles, 10 parts of polycrystalline mullite fiber, 5 parts of bauxite, 25 parts of river sludge, 10 parts of hardening modifier and 6 parts of acid-resistant auxiliary agent.
Preferably, the coal gangue sintered porous heat-insulating brick comprises the following components in parts by weight: 52 parts of coal gangue, 20 parts of expanded vitrified micro bubbles, 12 parts of polycrystalline mullite fiber, 4 parts of bauxite, 32 parts of river sludge, 10 parts of hardening modifier and 6 parts of acid-resistant auxiliary agent.
A preparation method of a coal gangue sintered porous insulating brick comprises the following steps:
s1: crushing the coal gangue into coal gangue powder by using a hammer crusher, and controlling the particle size of the crushed coal gangue powder to be 1-10 mm;
s2: taking river sludge; and carrying out pretreatment; adding water into the sludge and then placing the sludge in a primary sedimentation tank; after the sludge is precipitated in the first-stage sedimentation tank, the slurry tail water enters a second-stage sedimentation tank for continuous sedimentation and sequentially enters a third-stage sedimentation tank for sedimentation to obtain sludge in the first-stage sludge sedimentation tank, the second-stage sludge sedimentation tank and the third-stage sludge sedimentation tank; introducing ozone into the primary sedimentation tank, the secondary sedimentation tank and the tertiary sedimentation tank for deodorization;
s3: mixing to obtain sludge in the first, second and third sludge sedimentation tanks;
s4: heating and simultaneously stirring the sludge obtained in step S3 so that a slurry is formed;
s5: adding coal gangue powder, expanded vitrified micro bubbles, polycrystalline mullite fiber and bauxite into the slurry, continuously stirring, and adding a hardening modifier and an acid-resistant auxiliary agent to obtain mixed slurry;
s6: feeding the mixed slurry into an aging warehouse through a production line, sealing and aging for 2-3 days, spraying and moisturizing, and keeping the temperature at 25-30 ℃ and the pressure at 0.5-2 MPa;
s7: uniformly mixing the aged mixed slurry, feeding the mixture into a brick making machine, adding water, and performing vacuum-pumping extrusion and cutting to prepare green bricks;
s8: and after cooling, placing the green brick into a sintering kiln for sintering.
Preferably, the heating temperature in step S4 is 40-45 ℃.
Preferably, the stirring speed in step S5 is 600-800 rpm, and the stirring time is 0.8-1.5 h.
Preferably, the sintering in step S8 is performed by preheating, then performing secondary sintering, and then ending at low temperature.
Preferably, the preheating temperature is 100-200 ℃, the primary sintering temperature is 800-1000 ℃, the secondary sintering temperature is 690-800 ℃, and the low-temperature ending temperature is 200-300 ℃.
In summary, the invention has the advantages that:
according to the gangue sintered porous heat-insulating brick, the expanded and vitrified microspheres adopted in the fired porous brick have the advantages of light weight, low water absorption rate, low dry shrinkage rate and the like, and the polycrystalline mullite fiber is added, so that the gangue sintered porous heat-insulating brick has heat-insulating and heat-insulating effects and is simple in preparation process; energy conservation and emission reduction, environmental pollution prevention, and ecological environmental protection.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all 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
A coal gangue sintered porous insulating brick comprises the following components in parts by weight: 55 parts of coal gangue, 18 parts of expanded vitrified micro bubbles, 10 parts of polycrystalline mullite fiber, 5 parts of bauxite, 25 parts of river sludge, 10 parts of hardening modifier and 6 parts of acid-resistant auxiliary agent.
A preparation method of a coal gangue sintered porous insulating brick comprises the following steps:
s1: crushing the coal gangue into coal gangue powder by using a hammer crusher, and controlling the particle size of the crushed coal gangue powder to be 1-10 mm;
s2: taking river sludge; and carrying out pretreatment; adding water into the sludge and then placing the sludge in a primary sedimentation tank; after the sludge is precipitated in the first-stage sedimentation tank, the slurry tail water enters a second-stage sedimentation tank for continuous sedimentation and sequentially enters a third-stage sedimentation tank for sedimentation to obtain sludge in the first-stage sludge sedimentation tank, the second-stage sludge sedimentation tank and the third-stage sludge sedimentation tank; introducing ozone into the primary sedimentation tank, the secondary sedimentation tank and the tertiary sedimentation tank for deodorization;
s3: mixing to obtain sludge in the first, second and third sludge sedimentation tanks;
s4: heating and simultaneously stirring the sludge obtained in step S3 so that a slurry is formed;
s5: adding coal gangue powder, expanded vitrified micro bubbles, polycrystalline mullite fiber and bauxite into the slurry, continuously stirring, and adding a hardening modifier and an acid-resistant auxiliary agent to obtain mixed slurry;
s6: feeding the mixed slurry into an aging warehouse through a production line, sealing and aging for 2-3 days, spraying and moisturizing, and keeping the temperature at 25-30 ℃ and the pressure at 0.5-2 MPa;
s7: uniformly mixing the aged mixed slurry, feeding the mixture into a brick making machine, adding water, and performing vacuum-pumping extrusion and cutting to prepare green bricks;
s8: and after cooling, placing the green brick into a sintering kiln for sintering.
Specifically, the heating temperature in the step S4 is 40-45 ℃, the stirring speed in the step S5 is 800 revolutions per minute, the stirring time is 0.8-1.5 hours, the step S8 includes preheating, secondary sintering, and low-temperature ending, the preheating temperature is 100-200 ℃, the primary sintering temperature is 800-1000 ℃, the secondary sintering temperature is 690-800 ℃ and the low-temperature ending temperature is 200-300 ℃.
Example 2
A coal gangue sintered porous insulating brick comprises the following components in parts by weight: 52 parts of coal gangue, 20 parts of expanded vitrified micro bubbles, 12 parts of polycrystalline mullite fiber, 4 parts of bauxite, 32 parts of river sludge, 10 parts of hardening modifier and 6 parts of acid-resistant auxiliary agent.
A preparation method of a coal gangue sintered porous insulating brick comprises the following steps:
s1: crushing the coal gangue into coal gangue powder by using a hammer crusher, and controlling the particle size of the crushed coal gangue powder to be 1-10 mm;
s2: taking river sludge; and carrying out pretreatment; adding water into the sludge and then placing the sludge in a primary sedimentation tank; after the sludge is precipitated in the first-stage sedimentation tank, the slurry tail water enters a second-stage sedimentation tank for continuous sedimentation and sequentially enters a third-stage sedimentation tank for sedimentation to obtain sludge in the first-stage sludge sedimentation tank, the second-stage sludge sedimentation tank and the third-stage sludge sedimentation tank; introducing ozone into the primary sedimentation tank, the secondary sedimentation tank and the tertiary sedimentation tank for deodorization;
s3: mixing to obtain sludge in the first, second and third sludge sedimentation tanks;
s4: heating and simultaneously stirring the sludge obtained in step S3 so that a slurry is formed;
s5: adding coal gangue powder, expanded vitrified micro bubbles, polycrystalline mullite fiber and bauxite into the slurry, continuously stirring, and adding a hardening modifier and an acid-resistant auxiliary agent to obtain mixed slurry;
s6: feeding the mixed slurry into an aging warehouse through a production line, sealing and aging for 2-3 days, spraying and moisturizing, and keeping the temperature at 25-30 ℃ and the pressure at 0.5-2 MPa;
s7: uniformly mixing the aged mixed slurry, feeding the mixture into a brick making machine, adding water, and performing vacuum-pumping extrusion and cutting to prepare green bricks;
s8: and after cooling, placing the green brick into a sintering kiln for sintering.
Specifically, the heating temperature in the step S4 is 40-45 ℃, the stirring speed in the step S5 is 800 revolutions per minute, the stirring time is 0.8-1.5 hours, the step S8 includes preheating, secondary sintering, and low-temperature ending, the preheating temperature is 100-200 ℃, the primary sintering temperature is 800-1000 ℃, the secondary sintering temperature is 690-800 ℃ and the low-temperature ending temperature is 200-300 ℃.
Through various tests and determinations, the coal gangue brick has the following properties: the density is 910kg/m3, the heat conductivity coefficient is 0.088W/(m.K), and the compressive strength is 18.6 MPa.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. A coal gangue sintered porous insulating brick is characterized in that: comprises the following components in parts by weight: 50-65 parts of coal gangue, 15-25 parts of expanded and vitrified micro-beads, 5-15 parts of polycrystalline mullite fiber, 4-6 parts of bauxite, 20-35 parts of river silt, 8-15 parts of hardening modifier and 5-7 parts of acid-resistant auxiliary agent.
2. The coal gangue sintered porous insulating brick as claimed in claim 1, wherein: a coal gangue sintered porous insulating brick comprises the following components in parts by weight: 55 parts of coal gangue, 18 parts of expanded vitrified micro bubbles, 10 parts of polycrystalline mullite fiber, 5 parts of bauxite, 25 parts of river sludge, 10 parts of hardening modifier and 6 parts of acid-resistant auxiliary agent.
3. The coal gangue sintered porous insulating brick as claimed in claim 1, wherein: a coal gangue sintered porous insulating brick comprises the following components in parts by weight: 52 parts of coal gangue, 20 parts of expanded vitrified micro bubbles, 12 parts of polycrystalline mullite fiber, 4 parts of bauxite, 32 parts of river sludge, 10 parts of hardening modifier and 6 parts of acid-resistant auxiliary agent.
4. A preparation method of a coal gangue sintered porous insulating brick comprises the following steps:
s1: crushing the coal gangue into coal gangue powder by using a hammer crusher, and controlling the particle size of the crushed coal gangue powder to be 1-10 mm;
s2: taking river sludge; and carrying out pretreatment; adding water into the sludge and then placing the sludge in a primary sedimentation tank; after the sludge is precipitated in the first-stage sedimentation tank, the slurry tail water enters a second-stage sedimentation tank for continuous sedimentation and sequentially enters a third-stage sedimentation tank for sedimentation to obtain sludge in the first-stage sludge sedimentation tank, the second-stage sludge sedimentation tank and the third-stage sludge sedimentation tank; introducing ozone into the primary sedimentation tank, the secondary sedimentation tank and the tertiary sedimentation tank for deodorization;
s3: mixing to obtain sludge in the first, second and third sludge sedimentation tanks;
s4: heating and simultaneously stirring the sludge obtained in step S3 so that a slurry is formed;
s5: adding coal gangue powder, expanded vitrified micro bubbles, polycrystalline mullite fiber and bauxite into the slurry, continuously stirring, and adding a hardening modifier and an acid-resistant auxiliary agent to obtain mixed slurry;
s6: feeding the mixed slurry into an aging warehouse through a production line, sealing and aging for 2-3 days, spraying and moisturizing, and keeping the temperature at 25-30 ℃ and the pressure at 0.5-2 MPa;
s7: uniformly mixing the aged mixed slurry, feeding the mixture into a brick making machine, adding water, and performing vacuum-pumping extrusion and cutting to prepare green bricks;
s8: and after cooling, placing the green brick into a sintering kiln for sintering.
5. The preparation method of the coal gangue sintered porous insulating brick according to claim 4, characterized by comprising the following steps: the heating temperature in step S4 is 40-45 ℃.
6. The preparation method of the coal gangue sintered porous insulating brick according to claim 4, characterized by comprising the following steps: the stirring speed in the step S5 is 600-800 r/m, and the stirring time is 0.8-1.5 h.
7. The preparation method of the coal gangue sintered porous insulating brick according to claim 4, characterized by comprising the following steps: and step S8, preheating, secondary sintering and low-temperature ending are carried out during sintering.
8. The preparation method of the coal gangue sintered porous insulating brick according to claim 7, characterized by comprising the following steps: the preheating temperature is 100-200 ℃, the primary sintering temperature is 800-1000 ℃, the secondary sintering temperature is 690-800 ℃, and the low-temperature ending temperature is 200-300 ℃.
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| CN201911386594.3A CN111004015A (en) | 2019-12-29 | 2019-12-29 | Gangue sintered porous insulating brick |
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| CN201911386594.3A CN111004015A (en) | 2019-12-29 | 2019-12-29 | Gangue sintered porous insulating brick |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111995426A (en) * | 2020-08-14 | 2020-11-27 | 师宗县泰宇新型建材有限公司 | High-strength coal gangue sintered perforated brick and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111995426A (en) * | 2020-08-14 | 2020-11-27 | 师宗县泰宇新型建材有限公司 | High-strength coal gangue sintered perforated brick and preparation method thereof |
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