CN109279799B - Method for adding plate coagulant and paper-surface gypsum board made by same - Google Patents

Method for adding plate coagulant and paper-surface gypsum board made by same Download PDF

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CN109279799B
CN109279799B CN201710595477.2A CN201710595477A CN109279799B CN 109279799 B CN109279799 B CN 109279799B CN 201710595477 A CN201710595477 A CN 201710595477A CN 109279799 B CN109279799 B CN 109279799B
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coagulant
clinker
ultrasonic waves
gypsum
solution
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CN109279799A (en
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李帆
陈红霞
王霞
冉秀云
张晓菲
白风华
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Beijing New Building Material Group Co Ltd
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Beijing New Building Material Group Co Ltd
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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
    • C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
    • C04B22/08—Acids or salts thereof
    • C04B22/14—Acids or salts thereof containing sulfur in the anion, e.g. sulfides
    • C04B22/142—Sulfates
    • C04B22/143—Calcium-sulfate
    • 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
    • C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/10—Accelerators; Activators
    • C04B2103/12—Set accelerators
    • 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
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00612—Uses not provided for elsewhere in C04B2111/00 as one or more layers of a layered structure
    • C04B2111/0062—Gypsum-paper board like materials

Abstract

A method for adding plate coagulant and a paper-faced gypsum board made by the method comprise the following steps: step one, adding gypsum into water, and uniformly stirring to prepare a coagulant solution; step two, pretreating the coagulant solution by using ultrasonic waves, wherein the frequency of the ultrasonic waves is 80-120 Hz; step three, mixing the pretreated coagulant solution with clinker, and performing final coagulation; the paper-surface gypsum board coagulant enhances the coagulation accelerating effect, improves the slurry fluidity and reduces the production cost.

Description

Method for adding plate coagulant and paper-surface gypsum board made by same
Technical Field
The embodiment of the application relates to, but is not limited to, a method for adding a plate setting accelerator and a paper-surface gypsum board prepared by the method.
Background
The coagulant used mainly in the production of paper-surface gypsum board is gypsum or potassium sulfate, etc., and when potassium sulfate is used as 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 property and affects the product quality, so various factories generally adopt the ground gypsum as coagulant.
Content of application
The application provides a gypsum plaster board coagulant and a gypsum plaster board prepared from the same, wherein the gypsum plaster board coagulant enhances the coagulation accelerating effect, improves the fluidity of slurry and reduces the production cost.
In a first aspect, the present application provides a method of adding a panel accelerator, comprising the steps of:
step one, adding gypsum into water, and uniformly stirring to prepare a coagulant solution;
step two, pretreating the coagulant solution by using ultrasonic waves, wherein the frequency of the ultrasonic waves is 80-120 Hz;
and step three, mixing the pretreated coagulant solution with clinker, and performing final coagulation.
Optionally, in the second step, the ratio of the time for pretreating the coagulant solution by using ultrasonic waves to the volume of the coagulant solution is a constant k, and the constant k is 0.05 to 0.5 min/ml.
Optionally, in the second step, the time for pretreating the coagulant solution by using ultrasonic waves is 10 to 60 minutes.
Optionally, in the first step, the mass ratio of the gypsum to the water is 1: 20 to 200 parts.
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 third step, after the mixed solution is mixed with the clinker, the mass ratio of the mixed solution to the clinker is 1: 1.11-1.67.
In a second aspect, the present application provides a paper-faced gypsum board made according to the method of adding a board accelerator as defined in any one of the preceding claims.
Compared with the prior art, the method for adding the coagulant of the gypsum plaster boards has the advantages that the 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.
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 plate coagulant, which comprises the following steps:
step one, adding gypsum into water, and uniformly stirring to prepare a coagulant solution;
step two, pretreating the coagulant solution by using ultrasonic waves, wherein the frequency of the ultrasonic waves is 80-120 Hz;
and step three, mixing the pretreated coagulant solution with clinker, and performing final coagulation.
Optionally, in the second step, the ratio of the time for pretreating the coagulant solution by using ultrasonic waves to the volume of the coagulant solution is a constant k, and the constant k is 0.05 to 0.5 min/ml.
Optionally, in the second step, the time for pretreating the coagulant solution by using ultrasonic waves is 10 to 60 minutes.
Optionally, in the first step, the mass ratio of the gypsum to the water is 1: 20 to 200 parts.
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 third step, after the mixed solution is mixed with the clinker, the mass ratio of the mixed solution to the clinker is 1: 1.11-1.67.
In another aspect, the present application provides a paper-faced gypsum board made according to the method of adding a board accelerator as described in any one of the preceding claims.
In the following implementationIn the example where the setting accelerator is ground gypsum having a particle size of less than 0.01mm, the setting accelerator has a specific surface area of 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 plate coagulant comprises the following steps:
step one, adding 1g of gypsum into 130g of water, and uniformly stirring to prepare a coagulant solution;
step two, adopting ultrasonic waves to pretreat the coagulant solution, wherein the specific method of the pretreatment is as follows: placing the coagulant solution in a container with an opening, facing a KQ2200DE type numerical control ultrasonic cleaner to the opening, starting the ultrasonic cleaner, and emitting ultrasonic waves to the coagulant solution in the container, wherein the frequency of the ultrasonic waves is 120Hz, and the treatment time of the ultrasonic waves is 10 min;
and step three, mixing the pretreated coagulant solution with 200g of clinker, performing final setting, and measuring the initial setting time and the final setting time of the clinker.
The paper-faced gypsum board prepared by the adding method of the plate 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 coagulant of a paper-faced gypsum board comprises the following steps:
step one, adding 1g of gypsum into 130g of water, and uniformly stirring to prepare a coagulant solution;
step two, adopting ultrasonic waves to pretreat the coagulant solution, wherein the treatment time is 10min, and the frequency of the ultrasonic waves is 80 Hz;
and step three, mixing the pretreated coagulant solution with 200g of clinker, performing final setting, and measuring the initial setting time and the final setting time of the clinker.
The paper-faced gypsum board prepared by the adding method of the plate 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 3
A method for adding a coagulant of a paper-faced gypsum board comprises the following steps:
step one, adding 1g of gypsum into 130g of water, and uniformly stirring to prepare a coagulant solution;
step two, adopting ultrasonic waves to pretreat the coagulant solution, wherein the treatment time is 30min, and the frequency of the ultrasonic waves is 100 Hz;
and step three, mixing the pretreated coagulant solution with 200g of clinker, performing final setting, and measuring the initial setting time and the final setting time of the clinker.
The paper-faced gypsum board prepared by the adding method of the plate 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.
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
Uniformly mixing a coagulant with the weight of 1g and water with the weight of 130g, pretreating the coagulant solution by using ultrasonic waves, wherein the treatment time of the ultrasonic waves is 10min, the frequency of the adopted ultrasonic waves is 30Hz, pouring clinker with the weight of 200g into the treated mixed solution, and measuring the initial setting time and the final setting time of the clinker.
Comparative example 3
Uniformly mixing a coagulant with the weight of 1g and water with the weight of 130g, pretreating the coagulant solution by using ultrasonic waves, wherein the treatment time of the ultrasonic waves is 30min, the frequency of the adopted ultrasonic waves is 30Hz, pouring clinker with the weight of 200g into the treated mixed solution, and measuring the initial setting time and the final setting time of the clinker.
Comparative example 4
Uniformly mixing a coagulant with the weight of 1g and water with the weight of 130g, pretreating the coagulant solution by using ultrasonic waves, wherein the treatment time of the ultrasonic waves is 30min, the frequency of the adopted ultrasonic waves is 120Hz, pouring clinker with the weight of 200g into the treated mixed solution, and measuring the initial setting time and the final setting time of the clinker.
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
Figure BDA0001355790530000051
Figure BDA0001355790530000061
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
Figure BDA0001355790530000062
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 plate coagulant is characterized by comprising the following steps:
step one, adding gypsum into water, and uniformly stirring to prepare a coagulant solution;
step two, pretreating the coagulant solution by using ultrasonic waves, wherein the frequency of the ultrasonic waves is 80-120 Hz;
step three, mixing the pretreated coagulant solution with clinker, and performing final coagulation; in the second step, the ratio of the time for pretreating the coagulant solution by using ultrasonic waves to the volume of the coagulant solution is a constant k, and the value of the constant k is 0.05-0.5 min/ml;
in the first step, the mass ratio of the gypsum to the water is 1: 20-200 parts of;
the raw material in the step oneThe gypsum has particle size less than 0.01mm and specific surface area of 20000cm2/g~30000cm2/g；
In the third step, after the mixed solution and the clinker are mixed, the mass ratio of the mixed solution to the clinker is 1: 1.11-1.67.
2. The method for adding plate accelerator according to claim 1, wherein in the second step, the time for pretreating the accelerator solution with ultrasonic waves is 10 to 60 minutes.
3. A paper-faced gypsum board made by the method of adding a board set accelerator according to any of claims 1 to 2.
CN201710595477.2A 2017-07-20 2017-07-20 Method for adding plate coagulant and paper-surface gypsum board made by same Active CN109279799B (en)

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CN111205004B (en) * 2020-02-12 2022-01-25 肇庆北新建材有限公司 Gypsum production facility
CN112812238B (en) * 2020-12-30 2023-06-06 山西佳维新材料股份有限公司 Polycarboxylate superplasticizer and preparation method and application thereof

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EP2516343A4 (en) * 2009-12-22 2014-03-12 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
CN104973882A (en) * 2015-06-25 2015-10-14 北新集团建材股份有限公司 Preparation method of paper-surface gypsum board

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