CN109422484B - Mineral wool board with low water content and preparation method thereof - Google Patents
Mineral wool board with low water content and preparation method thereof Download PDFInfo
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- CN109422484B CN109422484B CN201710718335.0A CN201710718335A CN109422484B CN 109422484 B CN109422484 B CN 109422484B CN 201710718335 A CN201710718335 A CN 201710718335A CN 109422484 B CN109422484 B CN 109422484B
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- mineral wool
- polyacrylamide
- starch
- wool board
- attapulgite clay
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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
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/28—Polysaccharides or derivatives thereof
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Paper (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Producing Shaped Articles From Materials (AREA)
Abstract
A low moisture content mineral wool board and a preparation method thereof, the low moisture content mineral wool board comprises granular cotton, attapulgite clay, starch, aluminum sulfate and polyacrylamide, and the attapulgite clay: starch: the mass ratio of the polyacrylamide is (30-40): (15-17): 1; the method comprises the steps of sequentially adding polyacrylamide, starch, attapulgite clay, granular cotton and aluminum sulfate into water, stirring, filtering, molding and drying. The moisture content of the wet board of the mineral wool board of low moisture content of this application is showing the moisture content that is less than the wet board of current mineral wool board between 120-plus 135%, has reduced the energy resource consumption of follow-up drying workshop section.
Description
Technical Field
The application relates to but is not limited to a mineral wool board, in particular to but not limited to a mineral wool board with low water content and a preparation method thereof.
Background
The existing mineral wool board production usually adopts wet forming, the formed wet board blank contains 150-170% of moisture, and then the moisture is evaporated through heating in subsequent sections, so that a large amount of energy is consumed.
Therefore, there is a need to develop a mineral wool board with low moisture content to reduce energy consumption during the production of the mineral wool board.
Disclosure of Invention
The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.
The application provides a mineral wool board and a preparation method thereof, wherein the moisture content of a wet board of the mineral wool board after molding is obviously lower than that of the existing mineral wool board.
Specifically, the application provides a mineral wool board with low water content, which comprises granular cotton, attapulgite clay, starch, aluminum sulfate and polyacrylamide, and is characterized in that the attapulgite clay: starch: the mass ratio of the polyacrylamide is (30-40): (15-17): 1.
in an embodiment of the present application, the aluminum sulfate: the mass ratio of the polyacrylamide can be (0.63-0.77): 1.
in an embodiment of the present application, the attapulgite clay: starch: aluminum sulfate: the mass ratio of polyacrylamide may be 37: 16.7: 0.76: 1.
in an embodiment of the present application, the granular cotton: the mass ratio of polyacrylamide may be 233: 1.
the present application also provides a method of making a low moisture content mineral wool panel as described above, the method comprising: adding polyacrylamide, starch, attapulgite clay, granular cotton and aluminum sulfate into water in sequence, stirring, filtering, molding and drying.
The polyacrylamide is an organic polymer, the monomer molecules of the polyacrylamide are in a chain shape, and Al generated by aluminum sulfate3+The polyacrylamide molecules of the monomer and the small floccules formed in the slurry are bridged together to form a large floccule, and the large floccule can be filled in the pores interwoven by the granular cotton in the forming section, so that a dehydration channel in the wet plate is blocked, and the dehydration effect is influenced. According to the method, the mass ratio of aluminum sulfate to polyacrylamide is strictly controlled, the size of the formed floc is controlled to be 2-3mm, so that smoothness of a dehydration channel in a wet plate blank at a forming section is ensured, and the dehydration rate of slurry is accelerated; secondly, the sedimentation speed of other auxiliary material particles in the formula is reduced, so that the other auxiliary materials are uniformly distributed in the slurry; thirdly, the flocs with the size of 2-3mm cannot be lost in the dehydration process, thereby avoiding the loss of starch and attapulgite clay and ensuring the plate strength of the prepared mineral wool plate.
Due to the mutual adsorption among polyacrylamide molecules and the adsorption of polyacrylamide on water molecules, the viscosity of the polyacrylamide aqueous solution is higher, and after the polyacrylamide is added into the mineral wool board, the viscosity of slurry is higher (about 2.3-2.8mPa.s), the fluidity is poorer, and the dehydration resistance is higher. In one aspect of the application, aluminum sulfate is added to produce Al3+The polyacrylamide is combined, so that the adsorption force among polyacrylamide molecules and between polyacrylamide and water molecules is reduced, the viscosity of the slurry is reduced, and the dehydration resistance is reduced; on the other hand, by strictly controlling the mass ratio of the attapulgite clay to the starch to the polyacrylamide, the polyacrylamide can be well consumed, and the mass ratio of the starch to the polyacrylamide can be also well controlledThe viscosity of the slurry can be reduced.
Detailed Description
Embodiments of the present application are described below by way of examples, and it should be appreciated by those skilled in the art that these specific examples merely illustrate selected embodiments for achieving the purposes of the present application and are not intended to limit the technical solutions. Modifications of the technical solutions of the present application in combination with the prior art are obvious from the teachings of the present application and fall within the protection scope of the present application.
In the following examples of the present application, the chemical agents used are any commercially available chemical agents unless otherwise specified.
Examples 1 to 4
Weighing the components according to the mass in the table 1, sequentially adding polyacrylamide, starch, attapulgite clay, granular cotton and aluminum sulfate into a stirring tank containing 6412.5kg of water for stirring, wherein the stirring time is 5min, the rotating speed is 1500r/min, quickly transferring the stirred slurry into a forming dehydration mold commonly used in the field, putting down an extrusion flat plate until a pressure pointer shows 100N, stopping pressurizing, standing for 10min, lifting a pressing plate, taking out the prepared wet plate blank for weighing, and then putting the wet plate blank into a drying box for drying at 220 ℃ for 2.5 h. After drying, weighing and calculating the water content of the wet plate, and detecting the strength of the plate according to a method specified in the national standard GB/T25998-.
TABLE 1
As can be seen from Table 1, with the gradual decrease of the mass ratio of polyacrylamide to aluminum sulfate, under the same pressure and dehydration container, the moisture content of the wet board is significantly reduced, and the flexural strength of the boards of examples 1-3 is not greatly changed, while the flexural strength of the board of example 4 is greatly reduced, because the amount of polyacrylamide is reduced, the starch and clay particles in the slurry cannot be effectively converted into flocks with proper size, so that the flocks are smaller, and the loss of starch and attapulgite clay as a binder is caused during the dehydration process, thereby reducing the flexural strength of the board.
Since the data in Table 1 are laboratory data, resulting in a high moisture content, the moisture content of the wet sheets was between 120-135% when scale-up production was performed according to the recipes of examples 1-4.
The description is of the preferred embodiment of the present application and is not intended to limit the present application in any way or manner. Those skilled in the art should, however, appreciate that many modifications, adaptations, and variations are possible in light of the above teaching without departing from the scope of the present invention; meanwhile, any equivalent changes, modifications and evolutions of the above embodiments according to the essential technology of the present application are within the scope of the present application defined by the claims.
Claims (5)
1. The mineral wool board with low water content comprises granular cotton, attapulgite clay, starch, aluminum sulfate and polyacrylamide, and is characterized in that the attapulgite clay: starch: the mass ratio of the polyacrylamide is (30-40): (15-17): 1;
adding the raw materials into water, stirring to form slurry, transferring the slurry into a forming dehydration mold to prepare a plate blank, and drying the plate blank in a drying box to obtain the mineral wool plate with low water content;
the water content of the mineral wool board slab is 120-135%.
2. The low moisture content mineral wool panel of claim 1 wherein said aluminum sulfate: the mass ratio of the polyacrylamide is (0.63-0.77): 1.
3. the low moisture mineral wool board of claim 2, wherein the attapulgite clay: starch: aluminum sulfate: the mass ratio of polyacrylamide is 37: 16.7: 0.76: 1.
4. a low moisture mineral wool panel as claimed in any one of claims 1 to 3, wherein the particulate cotton: the mass ratio of the polyacrylamide is 233: 1.
5. a method of producing the low moisture content mineral wool panel according to any one of claims 1 to 4, comprising: adding polyacrylamide, starch, attapulgite clay, granular cotton and aluminum sulfate into water in sequence, stirring, filtering, molding and drying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710718335.0A CN109422484B (en) | 2017-08-21 | 2017-08-21 | Mineral wool board with low water content and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710718335.0A CN109422484B (en) | 2017-08-21 | 2017-08-21 | Mineral wool board with low water content and preparation method thereof |
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| Publication Number | Publication Date |
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| CN109422484A CN109422484A (en) | 2019-03-05 |
| CN109422484B true CN109422484B (en) | 2021-06-08 |
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| CN201710718335.0A Active CN109422484B (en) | 2017-08-21 | 2017-08-21 | Mineral wool board with low water content and preparation method thereof |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4655950A (en) * | 1985-01-07 | 1987-04-07 | United States Gypsum Company | Foamed cast acoustical material and method |
| CN102400527A (en) * | 2010-09-15 | 2012-04-04 | 北新集团建材股份有限公司 | Environment-friendly mineral wool board with functions of humidity adjustment and air purification and production method thereof |
| CN102400498A (en) * | 2010-09-15 | 2012-04-04 | 北新集团建材股份有限公司 | Novel enhanced mineral cotton acoustic board and preparation method thereof |
| CN103321312A (en) * | 2012-10-23 | 2013-09-25 | 北新集团建材股份有限公司 | Production method of mineral wool boards |
| CN105985071A (en) * | 2015-02-10 | 2016-10-05 | 北新集团建材股份有限公司 | Eco-friendly mineral wool board and preparation method thereof |
| CN106278133A (en) * | 2015-06-25 | 2017-01-04 | 北新集团建材股份有限公司 | A kind of sheet material for producing pyramid mineral wool board and preparation method thereof |
-
2017
- 2017-08-21 CN CN201710718335.0A patent/CN109422484B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4655950A (en) * | 1985-01-07 | 1987-04-07 | United States Gypsum Company | Foamed cast acoustical material and method |
| CN102400527A (en) * | 2010-09-15 | 2012-04-04 | 北新集团建材股份有限公司 | Environment-friendly mineral wool board with functions of humidity adjustment and air purification and production method thereof |
| CN102400498A (en) * | 2010-09-15 | 2012-04-04 | 北新集团建材股份有限公司 | Novel enhanced mineral cotton acoustic board and preparation method thereof |
| CN103321312A (en) * | 2012-10-23 | 2013-09-25 | 北新集团建材股份有限公司 | Production method of mineral wool boards |
| CN105985071A (en) * | 2015-02-10 | 2016-10-05 | 北新集团建材股份有限公司 | Eco-friendly mineral wool board and preparation method thereof |
| CN106278133A (en) * | 2015-06-25 | 2017-01-04 | 北新集团建材股份有限公司 | A kind of sheet material for producing pyramid mineral wool board and preparation method thereof |
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| CN109422484A (en) | 2019-03-05 |
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