CN113024216A - Method for preparing assembled heat-insulating wallboard from sulfur fixation ash - Google Patents
Method for preparing assembled heat-insulating wallboard from sulfur fixation ash Download PDFInfo
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- CN113024216A CN113024216A CN202110331696.6A CN202110331696A CN113024216A CN 113024216 A CN113024216 A CN 113024216A CN 202110331696 A CN202110331696 A CN 202110331696A CN 113024216 A CN113024216 A CN 113024216A
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- sulfur
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- sulfur fixation
- insulation wallboard
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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
- C04B28/14—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
- C04B28/142—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 containing synthetic or waste calcium sulfate cements
- C04B28/144—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 containing synthetic or waste calcium sulfate cements the synthetic calcium sulfate being a flue gas desulfurization product
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
- E04C2/26—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups
- E04C2/284—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups at least one of the materials being insulating
- E04C2/288—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups at least one of the materials being insulating composed of insulating material and concrete, stone or stone-like material
- E04C2/2885—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups at least one of the materials being insulating composed of insulating material and concrete, stone or stone-like material with the insulating material being completely surrounded by, or embedded in, a stone-like material, e.g. the insulating material being discontinuous
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Ceramic Engineering (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to the field of fabricated buildings, and particularly discloses a method for preparing a fabricated heat-insulation wallboard by using sulfur fixation ash, which comprises the following steps: sending the sulfur fixation ash and water into a ball mill according to a certain proportion, performing ball milling to prepare uniform slurry, then sending the slurry into a pouring stirrer, adding a certain proportion of gypsum, cement and quicklime, continuously stirring the mixture for 2-5min, uniformly stirring the mixture, finally adding a certain proportion of aluminum paste, and continuously stirring for 1-2min to obtain the assembly type heat-insulation wallboard slurry. Then the materials are placed into a mould for shaping. The scheme improves the comprehensive utilization rate of the sulfur fixation ash, effectively solves the key technical problems of high calcium and high sulfur, low activity, large water absorption capacity, poor fluidity, uneven components and the like of the CFB sulfur fixation ash through modes of raw material pretreatment, process adjustment and the like, and is suitable for manufacturing the heat-insulating wallboard.
Description
Technical Field
The invention belongs to the field of environment-friendly wallboards, and particularly relates to a method for preparing an assembled heat-insulation wallboard from sulfur fixation ash.
Background
With the popularization of the assembly type building and the energy conservation of the building, the sale of the assembly type heat-insulating material is guaranteed in policy. Meanwhile, the state closes many enterprises for producing sintering type wallboard materials with serious pollution and backward process in the year, the gap of the wallboard material market is huge, and the market is opened up for the application of the assembled heat-insulating material.
Taking a power plant as an example, the waste material of the power plant takes CFB (circulating fluidized bed) solid sulfur ash as a main component. The chemical and mineral composition, microstructure and resource utilization performance of the CFB sulfur-fixing ash slag are obviously different from those of the traditional quicklime of the pulverized coal furnace. Taking building material products as an example, the stability and durability of the products using CFB (circulating fluidized bed) sulfur-fixing ash residues are greatly influenced, the influence rule and the improvement method are not clear, the large-dosage production application is difficult to realize, and the prior art has a large blank.
Disclosure of Invention
The invention aims to provide a method for preparing an assembled heat-insulation wallboard by using sulfur-fixing ash, which makes full use of waste materials of a power plant and simultaneously prepares a wallboard with strength meeting the standard.
In order to achieve the purpose, the invention provides a method for preparing an assembled thermal insulation wallboard by using sulfur fixation ash, which comprises the following steps: sending the sulfur fixation ash and water into a ball mill according to a certain proportion, performing ball milling to prepare uniform slurry, then sending the slurry into a pouring stirrer, sequentially adding gypsum, cement and quicklime according to a certain proportion, continuously stirring the mixture for 2-5min, uniformly stirring the mixture, finally adding aluminum powder paste according to a certain proportion, and continuously stirring for 1-2min to obtain the assembly type heat-insulation wallboard slurry; and then pouring the slurry into a preheated mold, standing the poured mold in a constant temperature environment of 50-60 ℃ for 1-2h for sufficient gas generation, transferring the mold into an autoclave for autoclave curing for 6-8h, controlling the temperature in the autoclave at 165-180 ℃ and the pressure at 0.8-1.1MPa, and standing the mold for 28-30 days after the autoclave curing is finished.
As an improvement of the scheme, when the ball mill is used for stirring the mixture added with water, the mixture is stirred quickly and then slowly.
As an improvement of the scheme, the proportion of the sulfur-fixing ash, the quicklime, the cement, the gypsum and the aluminum powder paste is respectively 33-37%, 8-10%, 4-5%, 1-2%, 0.03-0.04%, and the balance of water.
As an improvement of the scheme, the water-material ratio is 50-54%.
As an improvement of the scheme, the screened sulfur fixation ash with the grain diameter less than 0.5mm is selected.
As an improvement of the proposal, the content of the sulfur-fixing ash with the particle size less than 75 μm is 75-90%.
The invention has the following beneficial effects: the waste materials of the power plant can be used for manufacturing the heat-insulating wall board after being simply screened, the scheme improves the comprehensive utilization rate of the sulfur fixation ash, and the key technical problems of high calcium and high sulfur, low activity, large water absorption, poor fluidity, uneven components and the like of the CFB sulfur fixation ash are effectively solved through modes of raw material pretreatment, process adjustment and the like.
Detailed Description
The invention discloses a method for preparing an assembled heat-insulation wallboard by using sulfur fixation ash, which comprises the following steps: sending the sulfur fixation ash and water into a ball mill according to a certain proportion, performing ball milling to prepare uniform slurry, then sending the slurry into a pouring stirrer, sequentially adding gypsum, cement and quicklime according to a certain proportion, continuously stirring the mixture for 2-5min, uniformly stirring the mixture, finally adding aluminum powder paste according to a certain proportion, and continuously stirring for 1-2min to obtain the assembly type heat-insulation wallboard slurry; and then pouring the slurry into a preheated mold, standing the poured mold in a constant temperature environment of 50-60 ℃ for 1-2h for sufficient gas generation, transferring the mold into an autoclave for autoclave curing for 6-8h, controlling the temperature in the autoclave at 165-180 ℃ and the pressure at 0.8-1.1MPa, and standing the mold for 28-30 days after the autoclave curing is finished.
Preferably, the water-added mixture is stirred in a ball mill by rapid stirring and then by slow stirring.
Preferably, the proportion of the sulfur-fixing ash, the quicklime, the cement, the gypsum and the aluminum powder paste is 33-37%, 8-10%, 4-5%, 1-2%, 0.03-0.04% respectively, and the balance of water.
Preferably, the water-material ratio is 50-54%.
Preferably, the screened sulfur fixation ash with the particle size less than 0.5mm is selected.
Preferably, the content of the sulfur-fixing ash having a particle size of less than 75 μm is 75 to 90%.
Example one, 100kg is taken as a preparation reference, the content of sulfur-fixing ash is 37kg, the content of quicklime is 8kg, the content of cement is 4kg, the content of gypsum is 1kg, the content of aluminum powder paste is 0.03kg, the content of added water is 50kg, and the water-material ratio is 50%. After the test of the thermal insulation wallboard prepared by the method, the compressive strength is 6.1MPa, and the dry density is 1046 kg/m3。
In the second example, 100kg is taken as a preparation reference, the content of the sulfur-fixing ash is 36kg, the content of the quicklime is 8kg, the content of the cement is 4kg, the content of the gypsum is 1kg, the content of the aluminum powder paste is 0.03kg, the content of the added water is 51kg, and the water-material ratio is 51%. After the test of the thermal insulation wallboard prepared by the method, the compressive strength is 7MPa, and the dry density is 1025 kg/m3。
In the third example, based on 100kg of the preparation standard, the content of the sulfur-fixing ash is 35kg, the content of the quicklime is 8kg, the content of the cement is 4kg, the content of the gypsum is 1kg, the content of the aluminum powder paste is 0.03kg, the content of the added water is 52kg, and the water-material ratio is 52%. After the test of the thermal insulation wallboard prepared by the method, the compressive strength is 8.2MPa, and the dry density is 993 kg/m3。
Example four, based on 100kg as a preparation reference, the content of the sulfur-fixing ash is 34kg, the content of the quicklime is 8kg, the content of the cement is 4kg, the content of the gypsum is 1kg, the content of the aluminum powder paste is 0.03kg, the content of the added water is 53kg, and the water-material ratio is 53%. After the test of the thermal insulation wallboard prepared by the method, the compressive strength is 7.1MPa, and the dry density is 970 kg/m3。
In the fifth example, the content of the sulfur-fixing ash was 33kg, the content of the quicklime was 8kg, the content of the cement was 4kg, the content of the gypsum was 1kg, the content of the aluminum powder paste was 0.03kg, and the content of the added water was 54kg and the water-material ratio was 54% based on 100 kg. After the test of the thermal insulation wallboard prepared by the method, the compressive strength is 6.0MPa, and the dry density is 950 kg/m3。
Therefore, the dry density of the heat-insulating wallboard is gradually reduced along with the increase of the water-material ratio, the compressive strength of the heat-insulating wallboard is increased firstly and then reduced, the highest strength of the heat-insulating wallboard is 8.2MPa, the water-material ratio is 52 percent at the moment, the parameter is a better proportion, and the heat-insulating wallboard has practicability.
In the sixth embodiment, based on 100kg as a preparation standard, the slurry is not subjected to ball milling and pulping, the content of solid sulfur ash is 37kg, the content of quicklime is 8kg, the content of cement is 4kg, the content of gypsum is 1kg, the content of aluminum powder paste is 0.03kg, the content of added water is 50kg, and the water-material ratio is 50%. After the test, the compressive strength of the prepared thermal insulation wallboard is 5.2 MPa.
Example seven, based on 100kg as a preparation reference, the content of the sulfur-fixing ash is 33kg, the content of the quicklime is 10kg, the content of the cement is 5kg, the content of the gypsum is 2kg, the content of the aluminum powder paste is 0.03kg, the content of the added water is 50kg, and the water-material ratio is 50%. After the test, the compressive strength of the prepared thermal insulation wallboard is 9.2 MPa.
Example eight, on the basis of 100kg as a preparation standard, the content of sulfur-fixing ash is 35kg, the content of quicklime is 9kg, the content of cement is 4kg, the content of gypsum is 0kg, the content of aluminum powder paste is 0.03kg, the content of added water is 52kg, and the water-material ratio is 52%. After the test, the compressive strength of the prepared thermal insulation wallboard is 7.1 MPa.
In the ninth example, based on 100kg of the preparation standard, the content of the sulfur-fixing ash is 35kg, the content of the quicklime is 6kg, the content of the cement is 5kg, the content of the gypsum is 2kg, the content of the aluminum powder paste is 0.03kg, the content of the added water is 52kg, and the water-material ratio is 52%. After the test, the compressive strength of the prepared thermal insulation wallboard is 6.6 MPa.
In the tenth example, 100kg is taken as a preparation reference, the content of the sulfur-fixing ash is 35kg, the content of the quicklime is 11kg, the content of the cement is 2kg, the content of the gypsum is 0kg, the content of the aluminum powder paste is 0.03kg, the content of the added water is 52kg, and the water-material ratio is 52%. After the test of the thermal insulation wallboard prepared by the method, the compressive strength is 6.0 MPa.
EXAMPLE eleven, based on 100kgThe content of the sulfur-fixing ash is 35kg, the content of the quicklime is 8kg, the content of the cement is 4kg, the content of the gypsum is 1kg, the content of the aluminum powder paste is 0.035kg, the content of the added water is 52kg, and the water-material ratio is 52%. After the test of the thermal insulation wallboard prepared by the method, the compressive strength is 7.3MPa, and the dry density is 803 kg/m3。
In the twelfth example, based on 100kg of the preparation, the content of the sulfur-fixing ash was 35kg, the content of the quicklime was 8kg, the content of the cement was 4kg, the content of the gypsum was 1kg, the content of the aluminum powder paste was 0.04kg, and at this time, the content of the added water was 52kg and the water-material ratio was 52%. After the test of the thermal insulation wallboard prepared by the method, the compressive strength is 6.0MPa, and the dry density is 753 kg/m3。
Therefore, reasonable pretreatment of the sulfur fixation ash and setting of slurry mixing proportion are also needed for preparing the assembled thermal insulation wallboard. The slurry with uniform and stable consistency and reasonable mixing proportion is easy to generate gas and thicken, and finally the obtained thermal insulation wallboard has uniform pore distribution and good mechanical property and thermal insulation property; on the contrary, when the slurry is not uniform and the mixing ratio is unreasonable, the gas generation and thickening processes of the slurry are difficult to match, the finally obtained thermal insulation wallboard has uneven air hole distribution, and the deterioration of the mechanical property and the thermal insulation property is difficult to reach the standard requirement.
The scheme effectively solves the key technical problems of high calcium and high sulfur, low activity, large water absorption capacity, poor fluidity, uneven components and the like of CFB (cement fly ash) solid sulfur ash through the modes of raw material pretreatment, process adjustment and the like by matching with a reasonable water-material ratio and selecting a reasonable solid sulfur ash particle size on the basis of the traditional scheme.
The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (6)
1. A method for preparing an assembled heat-insulation wallboard by using sulfur fixation ash is characterized by comprising the following steps: sending the sulfur fixation ash and water into a ball mill according to a certain proportion, performing ball milling to prepare uniform slurry, then sending the slurry into a pouring stirrer, sequentially adding gypsum, cement and quicklime according to a certain proportion, continuously stirring the mixture for 2-5min, uniformly stirring the mixture, finally adding aluminum powder paste according to a certain proportion, and continuously stirring for 1-2min to obtain the assembly type heat-insulation wallboard slurry; and then pouring the slurry into a preheated mold, standing the poured mold in a constant temperature environment of 50-60 ℃ for 1-2h for sufficient gas generation, transferring the mold into an autoclave for autoclave curing for 6-8h, controlling the temperature in the autoclave at 165-180 ℃ and the pressure at 0.8-1.1MPa, and standing the mold for 28-30 days after the autoclave curing is finished.
2. The method for preparing the fabricated thermal insulation wallboard by using the sulfur fixation ash as claimed in claim 1, wherein the method comprises the following steps: when the mixture of water and water is stirred in a ball mill, the mixture is stirred quickly and then slowly.
3. The method for preparing the fabricated thermal insulation wallboard by using the sulfur fixation ash as claimed in claim 2, is characterized in that: the proportion of the sulfur-fixing ash, the quicklime, the cement, the gypsum and the aluminum powder paste is respectively 33-37%, 8-10%, 4-5%, 1-2%, 0.03-0.04%, and the balance of water.
4. The method for preparing the fabricated thermal insulation wallboard by using the sulfur fixation ash as claimed in claim 3, wherein the method comprises the following steps: the water-material ratio is 50-54%.
5. The method for preparing the fabricated thermal insulation wallboard by using the sulfur fixation ash as claimed in claim 4, wherein the method comprises the following steps: selecting the screened sulfur fixation ash with the grain diameter less than 0.5 mm.
6. The method for preparing the fabricated thermal insulation wallboard by using the sulfur fixation ash as claimed in claim 5, wherein the method comprises the following steps: the content of the sulfur-fixing ash with the particle size less than 75 μm is 75-90%.
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| CN202110331696.6A CN113024216A (en) | 2021-03-29 | 2021-03-29 | Method for preparing assembled heat-insulating wallboard from sulfur fixation ash |
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Citations (6)
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| CN101863678A (en) * | 2010-06-04 | 2010-10-20 | 西南科技大学 | Circulating fluidized bed sulfur fixation ash aerated concrete and preparation method thereof |
| CN102617058A (en) * | 2012-03-20 | 2012-08-01 | 西南科技大学 | Method for preparing hydraulic cementing material by utilizing sulfur fixation ash |
| CN102850012A (en) * | 2012-05-31 | 2013-01-02 | 贵州省建筑材料科学研究设计院 | Manufacturing method of high-calcium solid sulfur ash aerated concrete building blocks |
| CN103755378A (en) * | 2013-12-23 | 2014-04-30 | 武汉理工大学 | Aerated concrete building block and preparation method thereof |
| CN104961419A (en) * | 2015-06-06 | 2015-10-07 | 山西大学 | Production method of highly-doped fluidized bed combustion ash and slag autoclaved aerated block |
-
2021
- 2021-03-29 CN CN202110331696.6A patent/CN113024216A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090130452A1 (en) * | 2007-11-16 | 2009-05-21 | Serious Materials, Inc. | Low Embodied Energy Wallboards and Methods of Making Same |
| CN101863678A (en) * | 2010-06-04 | 2010-10-20 | 西南科技大学 | Circulating fluidized bed sulfur fixation ash aerated concrete and preparation method thereof |
| CN102617058A (en) * | 2012-03-20 | 2012-08-01 | 西南科技大学 | Method for preparing hydraulic cementing material by utilizing sulfur fixation ash |
| CN102850012A (en) * | 2012-05-31 | 2013-01-02 | 贵州省建筑材料科学研究设计院 | Manufacturing method of high-calcium solid sulfur ash aerated concrete building blocks |
| CN103755378A (en) * | 2013-12-23 | 2014-04-30 | 武汉理工大学 | Aerated concrete building block and preparation method thereof |
| CN104961419A (en) * | 2015-06-06 | 2015-10-07 | 山西大学 | Production method of highly-doped fluidized bed combustion ash and slag autoclaved aerated block |
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