CN110590292A - Environment-friendly light brick and preparation method thereof - Google Patents
Environment-friendly light brick and preparation method thereof Download PDFInfo
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- CN110590292A CN110590292A CN201911014651.5A CN201911014651A CN110590292A CN 110590292 A CN110590292 A CN 110590292A CN 201911014651 A CN201911014651 A CN 201911014651A CN 110590292 A CN110590292 A CN 110590292A
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- brick
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- silica sand
- bricks
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Classifications
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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
- C04B28/04—Portland cements
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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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
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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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
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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
- 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
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- 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 an environment-friendly light brick which is mainly prepared from the following raw materials: silica sand tailings with soil, fly ash, desulfurized gypsum, portland cement, lime, aluminum powder and water. The invention not only effectively reduces the production cost, but also avoids the water pollution problem caused by directly discarding the silica sand tailings; in addition, the high temperature resistance of the light brick is improved, the strength degradation of the light brick at high temperature is effectively prevented, and the mechanical property of the brick is enhanced.
Description
Technical Field
The invention relates to an environment-friendly light brick and a preparation method thereof, belonging to the technical field of environment-friendly bricks.
Background
With the rapid development of the building industry, the living standard of people is continuously improved, the high-rise frame building structure is widely used, the demand of light building material products matched with the high-rise frame building structure is continuously increased, and the light brick is one of the light building materials. The light brick is a preformed foaming brick (building block) which has the characteristics of light weight, high strength, high refractoriness, good sound insulation and heat preservation performance and the like, and the materials produced by the common light heat-insulating refractory brick comprise clay, high-aluminum high-strength floating bead brick, low-iron mullite, high-aluminum light heat-insulating refractory brick, diatomite heat-insulating refractory brick and the like, and are subjected to high-pressure forming and high-temperature firing. However, the price of raw materials such as mullite is as high as 3000 yuan per ton, and the diatomite is more expensive. For light brick manufacturers, it is always sought to find a way to produce light bricks meeting quality requirements with low raw material cost and more environment-friendly production.
The silica sand tailings are products of silica sand raw ores entering a dressing plant after crushing, grinding and sorting operations, and are discharged in an ore pulp state, so that the silica sand content is relatively low, and the silica sand tailings are directly discharged or stacked on a river channel in actual production, so that the water quality of a nearby water source is polluted.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an environment-friendly light brick and a preparation method thereof, so as to reduce the production cost, save resources and relieve the problem of environmental pollution caused by silica sand tailings.
In order to achieve the purpose, the invention adopts the technical scheme that: an environment-friendly light brick is mainly prepared from the following raw materials: silica sand tailings with soil, fly ash, desulfurized gypsum, portland cement, lime, aluminum powder and water.
Preferably, the weight percentages of the raw materials in the environment-friendly lightweight brick are as follows: 60-70% of silica sand tailings with clay, 7-9% of fly ash, 0.7-0.9% of desulfurized gypsum, 7.5-8.5% of Portland cement, 3-4% of quicklime, 0.04-0.05% of aluminum powder and 12-16% of water.
Preferably, the clay content in the silica sand tailings with clay is 20-40%.
The preparation method of the light brick provided by the invention comprises the following specific steps:
step one, putting the silica sand tailings with clay, fly ash, desulfurized gypsum and part of water into a ball mill according to the weight ratio, and beating into slurry, wherein the diffusivity of the slurry is 34 cm;
step two, adding the slurry, the portland cement and the lime obtained in the step one into a stirrer, stirring and mixing the slurry, the portland cement and the lime uniformly at normal temperature under the condition of the rotating speed of 400-500r/min, heating to 40-60 ℃, adding aluminum powder and continuing stirring to obtain a mixed material;
step three, pouring the mixed material obtained by the treatment in the step two into a brick mold immediately, sending the brick mold into a static curing room after the brick mold is fully poured, and statically curing the brick mold for 2.5 to 3 hours at the temperature of between 50 and 55 ℃ to obtain a brick blank;
step four, cutting the adobes obtained through the step three into bricks with specified sizes through a cutting machine;
and step five, conveying the bricks obtained through the treatment in the step four into a still kettle, carrying out still pressing for 6-10h at the atmospheric pressure of 10.5-11.5 and the high temperature of 200-300 ℃, then discharging the bricks from the still kettle, and cooling, storing or selling the bricks under natural conditions.
Preferably, in the second step, waste slurry is also added into the mixer, the waste slurry is formed by adding water into leftover materials during green brick cutting and stirring, and the adding amount of the waste slurry is 12% of the slurry.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention adopts the silica sand tailings as the aggregate, not only effectively reduces the production cost (about 20 percent lower than that of the mullite), but also effectively treats the silica sand tailings, and avoids the water pollution problem caused by directly abandoning the silica sand tailings;
2. due to the addition of the silica sand tailings, the high temperature resistance of the light brick is improved, the strength degradation of the light brick at high temperature is effectively prevented, and the mechanical property of the brick is enhanced;
3. the invention cancels the high-temperature calcination process, avoids air pollution, has compact connection of the whole process steps and relatively short preparation time, relatively improves the working efficiency and the production yield. In addition, frequent stacking is not needed, and the labor intensity of workers is reduced.
The environment-friendly light brick has the average volume weight of 0.96-1.12g/cm, the average compressive strength at normal temperature is 13-15MPa, the heat conductivity coefficient is 0.21w/m.k at 110 ℃, 0.32w/m.k at 200 ℃, the water absorption rate is 11.8-12.3 percent, and the highest service temperature is 1600 ℃.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. These examples are intended to illustrate the invention and are not intended to limit the scope of the invention.
The silica content of the silica sand tailings involved in the application is less than 5%, and the content of clayey mud (clay) is 20-40%.
Example one
The environment-friendly light brick is mainly prepared from the following raw materials: 61.6% of silica sand tailings with clay, 9% of fly ash, 0.9% of desulfurized gypsum, 8.45% of portland cement, 4% of quicklime, 0.05% of aluminum powder and 16% of water.
The content of mud in the silica sand tailings with mud is 20 percent.
The preparation method comprises the following specific steps:
step one, putting the silica sand tailings with clay, fly ash, desulfurized gypsum and part of water into a ball mill according to the weight ratio, and beating into slurry, wherein the diffusivity of the slurry is 34 cm;
adding 2500 kilograms of the slurry obtained in the step one, 300 kilograms of waste slurry, portland cement and lime into a stirrer, uniformly stirring and mixing at normal temperature under the condition of the rotating speed of 400 plus materials and 500r/min, heating to 45 ℃, adding aluminum powder, and continuously stirring for about 1min to obtain a mixed material, wherein the waste slurry is formed by adding water into leftover materials during the brick blank cutting;
step three, pouring the mixed material obtained by the treatment in the step two into a brick mold immediately, sending the brick mold into a static curing room after the brick mold is fully poured, and statically curing the brick mold for 3 hours at 50 ℃ to obtain a brick blank;
step four, cutting the green bricks obtained by the treatment in the step three into bricks with specified sizes by a special cutting machine;
and step five, conveying the bricks obtained through the treatment in the step four into a still kettle, carrying out still pressing for 8 hours at the high temperature of 200 ℃ under 11 atmospheric pressures, then discharging the bricks from the still kettle, and cooling, storing or selling the bricks under natural conditions.
The environment-friendly light brick of the embodiment is obtained by carrying out dry distillation on the green brick under the conditions of the average volume weight of 0.96g/cm, the average compressive strength at normal temperature of 13MPa, the thermal conductivity of 0.21w/m.k at 110 ℃ and 0.32w/m.k at 200 ℃, the water absorption rate of 12.3 percent, the highest use temperature of 1600 ℃, the maximum use temperature of 3 days at 1500 ℃ and the average compressive strength of 12.9 MPa.
Example two
The environment-friendly light brick is mainly prepared from the following raw materials: 69.7% of silica sand tailings with soil, 7% of fly ash, 0.7% of desulfurized gypsum, 7.56% of portland cement, 3% of lime, 0.04% of aluminum powder and 12% of water.
The content of soil in the silica sand tailings with soil is 40 percent.
The preparation method comprises the following specific steps:
step one, putting the silica sand tailings with clay, fly ash, desulfurized gypsum and part of water into a ball mill according to the weight ratio, and beating into slurry, wherein the diffusivity of the slurry is 34 cm;
adding 2500 kilograms of the slurry obtained in the step one, 300 kilograms of waste slurry, portland cement and lime into a stirrer, uniformly stirring and mixing at normal temperature under the condition of the rotating speed of 400 plus materials and 500r/min, heating to 60 ℃, adding aluminum powder, and continuously stirring for about 1min to obtain a mixed material, wherein the waste slurry is formed by adding water into leftover materials during the brick blank cutting;
step three, pouring the mixed material obtained by the treatment in the step two into a brick mold immediately, sending the brick mold into a static curing room after the brick mold is fully poured, and statically curing the brick mold for 2.5 hours at the temperature of 55 ℃ to obtain a brick blank;
step four, cutting the green bricks obtained by the treatment in the step three into bricks with specified sizes by a special cutting machine;
and step five, conveying the bricks obtained through the treatment in the step four into a still kettle, carrying out still pressing for 10 hours at a high temperature of 300 ℃ under 10.5 atmospheric pressure, then discharging the bricks from the still kettle, and cooling, storing or selling the bricks under natural conditions.
The environment-friendly light brick of the embodiment is obtained by carrying out dry distillation on the green brick under the conditions of the average volume weight of 1.12g/cm, the average compressive strength at normal temperature of 15MPa, the thermal conductivity of 0.21w/m.k at 110 ℃ and 0.32w/m.k at 200 ℃, the water absorption of 11.8 percent, the highest use temperature of 1600 ℃, the maximum use temperature of 3 days at 1500 ℃ and the average compressive strength of 14.78 MPa.
Claims (5)
1. An environment-friendly light brick is characterized by being mainly prepared from the following raw materials: silica sand tailings with soil, fly ash, desulfurized gypsum, portland cement, lime, aluminum powder and water.
2. The environment-friendly lightweight brick according to claim 1, wherein the weight percentages of the raw materials are as follows: 60-70% of silica sand tailings with clay, 7-9% of fly ash, 0.7-0.9% of desulfurized gypsum, 7.5-8.5% of Portland cement, 3-4% of quicklime, 0.04-0.05% of aluminum powder and 12-16% of water.
3. The environment-friendly lightweight brick according to claim 1 or 2, wherein the clay content in the silica sand tailings with clay is 20 to 40%.
4. The preparation method of the environment-friendly lightweight brick according to claim 3, which is characterized by comprising the following steps:
step one, putting the silica sand tailings with clay, fly ash, desulfurized gypsum and part of water into a ball mill according to the weight ratio, and beating into slurry, wherein the diffusivity of the slurry is 34 cm;
step two, adding the slurry, the portland cement and the lime obtained in the step one into a stirrer, stirring and mixing the slurry, the portland cement and the lime uniformly at normal temperature under the condition of the rotating speed of 400-500r/min, heating to 40-60 ℃, adding aluminum powder and continuing stirring to obtain a mixed material;
step three, pouring the mixed material obtained by the treatment in the step two into a brick mold immediately, sending the brick mold into a static curing room after the brick mold is fully poured, and statically curing the brick mold for 2.5 to 3 hours at the temperature of between 50 and 55 ℃ to obtain a brick blank;
step four, cutting the adobes obtained through the step three into bricks with specified sizes through a cutting machine;
and step five, conveying the bricks obtained through the treatment in the step four into a still kettle, carrying out still pressing for 6-10h at the atmospheric pressure of 10.5-11.5 and the high temperature of 200-300 ℃, then discharging the bricks from the still kettle, and cooling, storing or selling the bricks under natural conditions.
5. The method for preparing environment-friendly and lightweight bricks according to claim 4, wherein in the second step, waste slurry is added into the mixer, the waste slurry is formed by adding water into leftover materials during green brick cutting and stirring, and the addition amount of the waste slurry is 12% of the slurry.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911014651.5A CN110590292A (en) | 2019-10-24 | 2019-10-24 | Environment-friendly light brick and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911014651.5A CN110590292A (en) | 2019-10-24 | 2019-10-24 | Environment-friendly light brick and preparation method thereof |
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| CN110590292A true CN110590292A (en) | 2019-12-20 |
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Citations (6)
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| JP2001328877A (en) * | 2000-05-16 | 2001-11-27 | Sumitomo Kinzoku Kozan Siporex Kk | Method for producing alc |
| JP2004244279A (en) * | 2003-02-14 | 2004-09-02 | Sumitomo Kinzoku Kozan Siporex Kk | Method of manufacturing alc |
| CN102815959A (en) * | 2012-08-31 | 2012-12-12 | 麻城市惠森建材有限责任公司 | Environment-friendly aerated concrete block |
| CN103964797A (en) * | 2014-04-29 | 2014-08-06 | 贵州省开阳县三合东恒建材有限责任公司 | Autoclaved aerated concrete brick |
| CN106242514A (en) * | 2016-08-05 | 2016-12-21 | 中国科学院过程工程研究所 | A kind of composite solid waste light high-strength ceramic granule and preparation method thereof |
| CN109053109A (en) * | 2018-09-26 | 2018-12-21 | 广西旭腾实业集团有限公司 | A kind of high strength light aggregate concrete and preparation method thereof |
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2019
- 2019-10-24 CN CN201911014651.5A patent/CN110590292A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001328877A (en) * | 2000-05-16 | 2001-11-27 | Sumitomo Kinzoku Kozan Siporex Kk | Method for producing alc |
| JP2004244279A (en) * | 2003-02-14 | 2004-09-02 | Sumitomo Kinzoku Kozan Siporex Kk | Method of manufacturing alc |
| CN102815959A (en) * | 2012-08-31 | 2012-12-12 | 麻城市惠森建材有限责任公司 | Environment-friendly aerated concrete block |
| CN103964797A (en) * | 2014-04-29 | 2014-08-06 | 贵州省开阳县三合东恒建材有限责任公司 | Autoclaved aerated concrete brick |
| CN106242514A (en) * | 2016-08-05 | 2016-12-21 | 中国科学院过程工程研究所 | A kind of composite solid waste light high-strength ceramic granule and preparation method thereof |
| CN109053109A (en) * | 2018-09-26 | 2018-12-21 | 广西旭腾实业集团有限公司 | A kind of high strength light aggregate concrete and preparation method thereof |
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Application publication date: 20191220 |
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