CN109278192B - Method for adding gypsum board coagulant and gypsum board made by same - Google Patents
Method for adding gypsum board coagulant and gypsum board made by same Download PDFInfo
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- CN109278192B CN109278192B CN201710602100.5A CN201710602100A CN109278192B CN 109278192 B CN109278192 B CN 109278192B CN 201710602100 A CN201710602100 A CN 201710602100A CN 109278192 B CN109278192 B CN 109278192B
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- coagulant solution
- coagulant
- gypsum board
- gypsum
- clinker
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
- B28C7/04—Supplying or proportioning the ingredients
- B28C7/12—Supplying or proportioning liquid ingredients
-
- 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
-
- 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
- C04B28/145—Calcium sulfate hemi-hydrate with a specific crystal form
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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)
- Dispersion Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
A method for adding a gypsum board coagulant and a gypsum board prepared by the method, wherein the method for adding the coagulant comprises the following steps: firstly, mixing gypsum and water for the first time, and uniformly stirring to prepare a first coagulant solution; step two, pretreating the first coagulant solution by using ultrasonic waves, wherein the frequency of the ultrasonic waves is 80-120 Hz; step three, mixing the first coagulant solution after ultrasonic treatment with water for the second time to prepare a second coagulant solution; step four, mixing the second coagulant solution with the clinker, and performing final coagulation; the addition method of the gypsum board coagulant enhances the coagulation accelerating effect of the coagulant, improves the slurry fluidity and reduces the production cost.
Description
Technical Field
The embodiments of the present application relate to, but are not limited to, a method of adding a set accelerator to gypsum board and the gypsum board made therefrom.
Background
The coagulant used mainly in gypsum board production is gypsum or potassium sulfate, etc., and when potassium sulfate is used as the coagulant, the addition amount is large, which easily increases the brittleness of the board, reduces the breaking load strength of the gypsum board, reduces the bonding performance and affects the product quality, so various factories generally adopt the ground gypsum as the coagulant.
Content of application
The gypsum board coagulant adding method enhances the coagulation accelerating effect of the coagulant, improves the slurry fluidity and reduces the production cost.
In a first aspect, the present application provides a method of adding a set accelerator for gypsum board, comprising the steps of:
firstly, mixing gypsum and water for the first time, and uniformly stirring to prepare a first coagulant solution;
step two, pretreating the first coagulant solution by using ultrasonic waves, wherein the frequency of the ultrasonic waves is 80-120 Hz;
step three, mixing the first coagulant solution after ultrasonic treatment with water for the second time to obtain a second coagulant solution;
and step four, mixing the second coagulant solution with the clinker, and performing final coagulation.
Further, in the first step, in the first coagulant solution prepared by first mixing, the mass ratio of the gypsum to the water is 1: 10-20.
In the third step, in the second coagulant solution prepared by mixing for the second time, the mass ratio of the first coagulant solution to the water is 1: 2-10.
In the second step, the ratio of the time for pretreating the first coagulant solution by using ultrasonic waves to the volume of the first coagulant solution is constant k, and the constant k is 0.05-0.5 min/ml.
Further, the particle size of the gypsum in the first step is less than 0.01mm, and the specific surface area is 20000cm2/g～30000cm2/g。
Further, in the fourth step, after the second coagulant solution is mixed with the clinker, the mass ratio of the second coagulant solution to the clinker is 1: 1.11-1.67.
In a second aspect, the present application provides a gypsum board made according to the method of addition of a setting accelerator as defined in any one of the preceding claims.
Compared with the prior art, the adding method of the gypsum board coagulant provided by the invention has the advantages that the first coagulant solution is subjected to ultrasonic pretreatment and then is mixed with the clinker, so that the adding method not only improves the coagulation accelerating effect of the gypsum, but also improves the slurry fluidity and reduces the production cost.
Because in the gypsum board production, the first coagulant solution that needs to be added is bulky, and the ultrasonic irradiation time is long, has increased manufacturing cost, so this application carries out the first mixture back with gypsum and water, adopts ultrasonic pretreatment, carries out the second with water again and mixes, has reduced the first coagulant solution's that the ultrasonic wave needs to shine volume, has saved the ultrasonic energy consumption, reduction in production cost.
Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the application. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and claims hereof.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
The application provides an adding method of a gypsum board coagulant, which comprises the following steps:
firstly, mixing gypsum and water for the first time, and uniformly stirring to prepare a first coagulant solution;
step two, pretreating the first coagulant solution by using ultrasonic waves, wherein the frequency of the ultrasonic waves is 80-120 Hz;
step three, mixing the first coagulant solution after ultrasonic treatment with water for the second time to obtain a second coagulant solution;
and step four, mixing the second coagulant solution with the clinker, and performing final coagulation.
Optionally, in the first step, in the first coagulant solution prepared by first mixing, the mass ratio of the gypsum to the water is 1: 10-20.
Optionally, in the third step, in the second coagulant solution prepared by mixing for the second time, the mass ratio of the first coagulant solution to the water is 1: 2-10.
Optionally, in the second step, the ratio of the time for pretreating the first coagulant solution by using ultrasonic waves to the volume of the first coagulant solution is a constant k, and the constant k is 0.05-0.5 min/ml.
Optionally, the particle size of the gypsum in the first step is less than 0.01mm, and the specific surface area is 20000cm2/g～30000cm2/g。
Optionally, in the fourth step, after the second coagulant solution is mixed with the clinker, the mass ratio of the second coagulant solution to the clinker is 1: 1.11-1.33.
In another aspect, the present application provides a gypsum board made according to the method of addition of a set accelerator as described in any one of the preceding claims.
In the examples described below, the setting accelerator was ground gypsum having a particle size of less than 0.01mm, and the specific surface area of the setting accelerator was 24004cm as measured by BET2The clinker is obtained by grinding Ninghai gypsum, the clinker is obtained by slowly calcining Ninghai gypsum, ultrasonic waves are emitted by a KQ2200DE type numerical control ultrasonic cleaner, and the initial setting time and the final setting time of the clinker are measured by adopting the standard GB/T17669.4-1999.
Example 1
A method for adding a gypsum board accelerator comprises the following steps:
step one, adding 1g of gypsum into 20g of water, and uniformly stirring to prepare a first coagulant solution;
step two, adopting ultrasonic waves to pretreat the first coagulant solution, wherein the treatment time is 1min, and the frequency of the ultrasonic waves is 80 Hz;
step three, mixing the first coagulant solution after ultrasonic treatment with 110g of water to obtain a second coagulant solution;
and step four, mixing the second coagulant solution with 200g of clinker, 1.4g of binder, 1g of water reducing agent and 1g of foaming agent respectively, and performing final coagulation, wherein the clinker is plaster of Paris.
A gypsum board prepared by the adding method of the gypsum board coagulant comprises the following raw materials by mass: 1g of coagulant, 200g of clinker, 1.4g of binder, 1g of water reducer and 1g of foaming agent, wherein the clinker is plaster of paris.
Example 2
A method for adding a gypsum board accelerator comprises the following steps:
step one, adding 1g of gypsum into 10g of water, and uniformly stirring to prepare a first coagulant solution;
step two, adopting ultrasonic waves to pretreat the first coagulant solution, wherein the treatment time is 1min, and the frequency of the ultrasonic waves is 120 Hz;
step three, mixing the first coagulant solution treated by ultrasonic wave with 120g of water to obtain a second coagulant solution;
and step four, mixing the obtained second coagulant solution with 200g of clinker, 1.4g of binder, 1g of water reducing agent and 1g of foaming agent respectively, and performing final coagulation, wherein the clinker is calcined gypsum.
A gypsum board prepared by the adding method of the gypsum board coagulant comprises the following raw materials by mass: 1g of coagulant, 200g of clinker, 1.4g of binder, 1g of water reducer and 1g of foaming agent.
Example 3
A method for adding a gypsum board accelerator comprises the following steps:
step one, adding 1g of gypsum into 15g of water, and uniformly stirring to prepare a first coagulant solution;
secondly, pretreating the first coagulant solution by using ultrasonic waves, wherein the treatment time is 1min, and the frequency of the ultrasonic waves is 100 Hz;
step three, mixing the first coagulant solution treated by ultrasonic wave with 115g of water to obtain a second coagulant solution;
and step four, mixing the obtained second coagulant solution with 200g of clinker, 1.4g of binder, 1g of water reducing agent and 1g of foaming agent respectively, and performing final coagulation, wherein the clinker is calcined gypsum.
A gypsum board prepared by the adding method of the gypsum board coagulant comprises the following raw materials by mass: 1g of coagulant, 200g of clinker, 1.4g of binder, 1g of water reducer and 1g of foaming agent.
And (3) experimental test:
in the following examples, the setting accelerator was ground gypsum having a particle size of less than 0.01mm, and the specific surface area of the setting accelerator was 24004cm as measured by BET2The initial setting and final setting times of the clinker are determined using standard GB/T17669.4-1999.
Comparative example 1
Instead of adding a coagulant to the clinker, 200g of clinker was added to 130g of water and the initial setting and final setting times of the clinker were measured using standard GB/T17669.4-1999.
Comparative example 2
Adding 1g of gypsum into 20g of water, and uniformly stirring to prepare a first coagulant solution; pretreating the first coagulant solution by using ultrasonic waves for 1min, wherein the frequency of the ultrasonic waves is 30 Hz; mixing the first coagulant solution after the ultrasonic treatment with 110g of water to obtain a second coagulant solution; after mixing the second coagulant solution described above with 200g of clinker, the initial setting and final setting times of the clinker were measured. First Accelerator solution A second Accelerator solution
Comparative example 3
Adding 1g of gypsum into 20g of water, and uniformly stirring to prepare a first coagulant solution; pretreating the first coagulant solution by using ultrasonic waves, wherein the treatment time is 10min, and the frequency of the ultrasonic waves is 30 Hz; mixing the first coagulant solution after the ultrasonic treatment with 110g of water to obtain a second coagulant solution; after mixing the second coagulant solution described above with 200g of clinker, the initial setting and final setting times of the clinker were measured. First Accelerator solution A second Accelerator solution
Comparative example 4
Adding 1g of gypsum into 20g of water, and uniformly stirring to prepare a first coagulant solution; pretreating the first coagulant solution by using ultrasonic waves, wherein the treatment time is 10min, and the frequency of the ultrasonic waves is 120 Hz; mixing the first coagulant solution after the ultrasonic treatment with 110g of water to obtain a second coagulant solution; after mixing the second coagulant solution described above with 200g of clinker, the initial setting and final setting times of the clinker were measured. First Accelerator solution A second Accelerator solution
The results of the measurements performed in comparative examples 1 to 4 and example 1 of the present application are shown in Table 1:
TABLE 1 initial and Final setting time measurement results
From the above measurement results, it can be seen that the initial setting time and final setting time are too long for the slurry of comparative example 1 without the addition of the setting accelerator, which seriously affects the production of gypsum boards, while the initial setting time and final setting time of the clinker are shortened and the setting accelerating effect is close to each other by using the ultrasonic power of 120Hz in both example 1 and comparative example 4 of the present application, and therefore, the ultrasonic treatment time is too long and the initial setting time and final setting time of the clinker cannot be shortened; the coagulation time of the comparative examples 2 and 3 is significantly lower than that of the examples 1 and 4 of the present application by using 30Hz ultrasonic power; the result analysis can show that the ultrasonic treatment time has no obvious influence on the coagulation promoting effect, but the ultrasonic power has larger influence on the coagulation promoting effect, and the larger power has better coagulation promoting effect.
Furthermore, the initial setting and final setting times of the clinker were determined using the standard GB/T17669.4-1999 for examples 2 and 3 of the present application, and the results are shown in Table 2:
table 2 results of measurements in example 2 and example 3
From the above measurement results, it can be seen that both examples 2 and 3 can provide the coagulant with a better coagulation accelerating effect, but the ultrasonic treatment time is not too short, the ultrasonic treatment time is not enough to uniformly distribute the coagulant in a short time, and the ultrasonic treatment time is too long, so that the coagulation accelerating effect is not obviously improved; if the ultrasonic frequency is too low, the coagulation promoting effect is seriously affected.
Although the embodiments disclosed in the present application are described above, the descriptions are only for the convenience of understanding the present application, and are not intended to limit the present application. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the disclosure as defined by the appended claims.
Claims (3)
1. A method for adding a gypsum board accelerator is characterized by comprising the following steps:
firstly, mixing gypsum and water for the first time, and uniformly stirring to prepare a first coagulant solution;
step two, pretreating the first coagulant solution by using ultrasonic waves, wherein the frequency of the ultrasonic waves is 80-120 Hz; wherein, the ratio of the time for pretreating the first coagulant solution by using ultrasonic waves to the volume of the first coagulant solution is a constant k, and the value of the constant k is 0.05-0.5 min/ml;
step three, mixing the first coagulant solution after ultrasonic treatment with water for the second time to prepare a second coagulant solution;
step four, mixing the second coagulant solution with the clinker, and performing final coagulation;
in the first step, in a first coagulant solution, the mass ratio of the gypsum to the water is 1: 10-20;
in the second step, the first coagulant solution is pretreated by ultrasonic waves for 1-15 minutes;
in the third step, in the second coagulant solution, the mass ratio of the first coagulant solution to the water is 1: 2-10;
in the fourth step, after the second coagulant solution is mixed with the clinker, the mass ratio of the second coagulant solution to the clinker is 1: 1.11-1.67.
2. The method of adding accelerator according to claim 1, wherein the particle size of the gypsum in the first step is less than 0.01mm, and the specific surface area is 20000cm2/g～30000cm2/g。
3. Gypsum board made by the method of adding an accelerator according to any of claims 1 to 2.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710602100.5A CN109278192B (en) | 2017-07-21 | 2017-07-21 | Method for adding gypsum board coagulant and gypsum board made by same |
| PCT/CN2017/106050 WO2019015139A1 (en) | 2017-07-21 | 2017-10-13 | Method for adding gypsum board coagulant and gypsum board produced using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710602100.5A CN109278192B (en) | 2017-07-21 | 2017-07-21 | Method for adding gypsum board coagulant and gypsum board made by same |
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| CN109278192A CN109278192A (en) | 2019-01-29 |
| CN109278192B true CN109278192B (en) | 2021-10-01 |
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| WO (1) | WO2019015139A1 (en) |
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| CN111606593A (en) * | 2019-04-26 | 2020-09-01 | 中建材创新科技研究院有限公司 | Calcined gypsum coagulant and preparation method thereof |
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| JPS6389448A (en) * | 1986-10-01 | 1988-04-20 | 三菱マテリアル株式会社 | Manufacture of gypsum slag hardened body |
| CN1300040C (en) * | 2004-09-30 | 2007-02-14 | 北新集团建材股份有限公司 | Refractory plasterboard and its production method |
| GB2431400A (en) * | 2005-10-19 | 2007-04-25 | Bpb Plc | Method for accelerating the setting reaction of a calcium sulphate hemihydrate and water slurry |
| CN201006859Y (en) * | 2006-12-30 | 2008-01-16 | 山东泰和东新股份有限公司 | Plaster tablets setting accelerator preparing device |
| MX2012007211A (en) * | 2009-12-22 | 2012-07-10 | Georgia Pacific Gypsum Llc | Method of manufacturing water-resistant gypsum articles and articles formed thereby. |
| US8226766B2 (en) * | 2010-12-22 | 2012-07-24 | United States Gypsum Company | Set accelerator for gypsum hydration |
| CN102212204B (en) * | 2011-05-16 | 2013-01-16 | 刘立文 | Modified anhydrous calcium sulfate and preparation method thereof |
| EP2607332A1 (en) * | 2011-12-19 | 2013-06-26 | Sika Technology AG | Setting accelerator for binders based on calcium sulphate |
| CN102814138B (en) * | 2012-08-29 | 2014-10-22 | 杭州天蓝环保工程设计有限公司 | White mud/acetylene sludge slurry preparing device and process |
| CN104556809A (en) * | 2014-12-04 | 2015-04-29 | 肇庆北新建材有限公司 | Method for preparing gypsum board coagulation accelerator |
| CN105542056B (en) * | 2015-12-28 | 2017-11-28 | 杭州树联园艺科技有限公司 | A kind of gypsum hydrogel composite material for sewage disposal and preparation method thereof |
| CN106007621A (en) * | 2016-05-23 | 2016-10-12 | 北新集团建材股份有限公司 | Method for producing gypsum plaster board by mixing desulfurized gypsum and phosphogypsum |
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| WO2019015139A1 (en) | 2019-01-24 |
| CN109278192A (en) | 2019-01-29 |
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