CN111908881A - Preparation method of low-cost plastering gypsum - Google Patents
Preparation method of low-cost plastering gypsum Download PDFInfo
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- CN111908881A CN111908881A CN202010772137.4A CN202010772137A CN111908881A CN 111908881 A CN111908881 A CN 111908881A CN 202010772137 A CN202010772137 A CN 202010772137A CN 111908881 A CN111908881 A CN 111908881A
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- gypsum
- cost
- protein powder
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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
-
- 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)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a preparation method of low-cost plastering gypsum, which is characterized in that desulfurized gypsum is calcined to obtain beta-semi-hydrated gypsum, the beta-semi-hydrated gypsum, causticized white sludge are uniformly stirred, and then uniformly stirred with hydroxypropyl methyl cellulose, lignocellulose and ultrahigh-gelation-degree protein powder. The low-cost plastering gypsum can be replaced by causticized white sludge and ultrahigh-gel-degree protein powder without adding expensive imports of a dispersing rubber powder and a retarder, not only can achieve the strength of the plastering gypsum, but also has low cost and can not cause the phenomenon of shrinkage cracking.
Description
Technical Field
The invention relates to the technical field of plastering gypsum, in particular to a preparation method of low-cost plastering gypsum.
Background
The currently marketed bottom layer plastering gypsum is usually manufactured by mixing outsourced mixed sand and surface layer plastering gypsum in proportion, the product performance produced by the method has higher dependence degree on the stability of the sand, and if the supply quality of the sand is unstable, the product performance is greatly influenced. The thickness and mixing ratio of the sand, i.e., the sand grains of different grain sizes, greatly affect the performance of the plastering gypsum because of: in concrete, the surface of the sand needs to be covered by gypsum slurry, and the greater the total surface area of the sand, the more gypsum slurry needs to be covered on the surface of the sand. Under the condition of the same dosage, the total surface area of the fine sand is larger, and the total surface area of the coarse sand is smaller, while the traditional process usually adopts powdery quartz sand, and the powdery quartz sand brings the reduction of the cracking resistance after exceeding a certain thickness.
The invention has strict requirements on the quality of the sand, and carries out deep research and analysis on the gradation of the sand, so that the prepared product has strong bonding force, effectively inhibits the shrinkage cracking phenomenon in plastering, and better solves the common problems of hollowing cracking, falling off and the like of cement mortar and mixed mortar plastering. In order to reduce the cost and effectively prevent the shrinkage cracking, it is necessary to research a preparation method of low-cost plastering gypsum.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides a preparation method of low-cost plastering gypsum.
The technical scheme of the invention is as follows:
a preparation method of low-cost plastering gypsum comprises the following steps:
A. after being pre-dried at the temperature of 80-90 ℃, the desulfurized gypsum enters a boiling calciner, is calcined at the temperature of 120-130 ℃, is added into an impact type flour mill for grinding, and is aged after being cooled;
B. uniformly stirring the aged desulfurized gypsum and the causticized white sludge, repeatedly grinding, and sieving by a 325-mesh sieve;
C. then adding hydroxypropyl methyl cellulose, lignocellulose and ultrahigh-gel-degree protein powder, uniformly stirring, grinding and sieving with a 200-mesh sieve.
Preferably, the aging time in the step A is 7 to 10 days.
Preferably, in the step B, the causticized white slime is paper-making alkali recovery causticized white slime with the water content of 8-15%.
Preferably, in the step C, the raw material of the ultrahigh-gelation-degree protein powder is eggs.
More preferably, in the step C, the gel degree of the ultrahigh gel degree protein powder is 1200-1400g cm-2。
Preferably, the low-cost plastering gypsum consists of the following components in percentage by weight: 8-15% of causticized white sludge, 1-3% of hydroxypropyl methyl cellulose, 2-5% of lignocellulose, 1-2% of ultrahigh-gelation-degree protein powder and the balance of desulfurized gypsum.
The invention has the advantages that: the preparation method of the low-cost plastering gypsum adopts the desulfurized gypsum to calcine to obtain the beta-semi-hydrated gypsum, uniformly mixes the beta-semi-hydrated gypsum with causticized white mud residue, then mixes the beta-semi-hydrated gypsum with hydroxypropyl methyl cellulose, lignocellulose and ultrahigh-gel-degree protein powder, and uniformly mixes the beta-semi-hydrated gypsum with the causticized white mud residue to obtain the plastering gypsum. The low-cost plastering gypsum can be replaced by causticized white sludge and ultrahigh-gel-degree protein powder without adding expensive imports of a dispersing rubber powder and a retarder, not only can achieve the strength of the plastering gypsum, but also has low cost and can not cause the phenomenon of shrinkage cracking.
Detailed Description
Example 1
A preparation method of low-cost plastering gypsum comprises the following steps:
A. after being pre-dried at the temperature of 85 ℃, the desulfurized gypsum enters a boiling calciner, is calcined at the temperature of 125 ℃, is added into an impact type pulverizer for grinding, and is aged after being cooled;
B. uniformly stirring the aged desulfurized gypsum and the causticized white sludge, repeatedly grinding, and sieving by a 325-mesh sieve;
C. then adding hydroxypropyl methyl cellulose, lignocellulose and ultrahigh-gel-degree protein powder, uniformly stirring, grinding and sieving with a 200-mesh sieve.
The aging time in the step A is 8 days.
In the step B, the causticized white slime is papermaking alkali recovery causticized white slime with the water content of 12 percent.
In the step C, the raw material of the ultrahigh-gelation-degree protein powder is eggs. In the step C, the gel content of the ultrahigh-gel-content protein powder is 1280g cm-2。
The low-cost plastering gypsum consists of the following components in percentage by weight: 12% of causticized white sludge, 1.5% of hydroxypropyl methylcellulose, 3.5% of lignocellulose, 1.5% of ultrahigh-gelation-degree protein powder and the balance of desulfurized gypsum.
Example 2
A preparation method of low-cost plastering gypsum comprises the following steps:
A. after being pre-dried at the temperature of 90 ℃, the desulfurized gypsum enters a boiling calciner, is calcined at the temperature of 120 ℃, is added into an impact type pulverizer for grinding, and is aged after being cooled;
B. uniformly stirring the aged desulfurized gypsum and the causticized white sludge, repeatedly grinding, and sieving by a 325-mesh sieve;
C. then adding hydroxypropyl methyl cellulose, lignocellulose and ultrahigh-gel-degree protein powder, uniformly stirring, grinding and sieving with a 200-mesh sieve.
The aging time in the step A is 10 days.
In the step B, the causticized white slime is papermaking alkali recovery causticized white slime with the water content of 8 percent.
In the step C, the raw material of the ultrahigh-gelation-degree protein powder is eggs. In the step C, the gel degree of the ultrahigh-gel-degree protein powder is 1400g cm-2。
The low-cost plastering gypsum consists of the following components in percentage by weight: 8% of causticized white sludge, 3% of hydroxypropyl methylcellulose, 2% of lignocellulose, 2% of ultrahigh-gelation-degree protein powder and the balance of desulfurized gypsum.
Example 3
A preparation method of low-cost plastering gypsum comprises the following steps:
A. after being pre-dried at the temperature of 80 ℃, the desulfurized gypsum enters a boiling calciner, is calcined at the temperature of 130 ℃, is added into an impact type pulverizer for grinding, and is aged after being cooled;
B. uniformly stirring the aged desulfurized gypsum and the causticized white sludge, repeatedly grinding, and sieving by a 325-mesh sieve;
C. then adding hydroxypropyl methyl cellulose, lignocellulose and ultrahigh-gel-degree protein powder, uniformly stirring, grinding and sieving with a 200-mesh sieve.
The aging time in the step A is 7 days.
In the step B, the causticized white slime is papermaking alkali recovery causticized white slime with the water content of 15 percent.
In the step C, the raw material of the ultrahigh-gelation-degree protein powder is eggs. In the step C, the gel degree of the ultrahigh-gel-degree protein powder is 1200g cm-2。
The low-cost plastering gypsum consists of the following components in percentage by weight: 15% of causticized white sludge, 1% of hydroxypropyl methyl cellulose, 5% of lignocellulose, 1% of ultrahigh-gelation-degree protein powder and the balance of desulfurized gypsum.
Example 4
A preparation method of low-cost plastering gypsum comprises the following steps:
A. after being pre-dried at the temperature of 82 ℃, the desulfurized gypsum enters a boiling calciner, is calcined at the temperature of 128 ℃, is added into an impact type pulverizer for grinding, and is aged after being cooled;
B. uniformly stirring the aged desulfurized gypsum and the causticized white sludge, repeatedly grinding, and sieving by a 325-mesh sieve;
C. then adding hydroxypropyl methyl cellulose, lignocellulose and ultrahigh-gel-degree protein powder, uniformly stirring, grinding and sieving with a 200-mesh sieve.
The aging time in the step A is 8 days.
In the step B, the causticized white slime is papermaking alkali recovery causticized white slime with the water content of 10 percent.
In the step C, the raw material of the ultrahigh-gelation-degree protein powder is eggs. In the step C, the gel content of the ultrahigh-gel-content protein powder is 1235g cm-2。
The low-cost plastering gypsum consists of the following components in percentage by weight: 12% of causticized white sludge, 2.5% of hydroxypropyl methylcellulose, 3.5% of lignocellulose, 1.5% of ultrahigh-gelation-degree protein powder and the balance of desulfurized gypsum.
Example 5
A preparation method of low-cost plastering gypsum comprises the following steps:
A. after being pre-dried at the temperature of 90 ℃, the desulfurized gypsum enters a boiling calciner, is calcined at the temperature of 130 ℃, is added into an impact type pulverizer for grinding, and is aged after being cooled;
B. uniformly stirring the aged desulfurized gypsum and the causticized white sludge, repeatedly grinding, and sieving by a 325-mesh sieve;
C. then adding hydroxypropyl methyl cellulose, lignocellulose and ultrahigh-gel-degree protein powder, uniformly stirring, grinding and sieving with a 200-mesh sieve.
The aging time in the step A is 7 days.
In the step B, the causticized white slime is papermaking alkali recovery causticized white slime with the water content of 15 percent.
In the step C, the raw material of the ultrahigh-gelation-degree protein powder is eggs. In the step C, the gel degree of the ultrahigh-gel-degree protein powder is 1200g cm-2。
The low-cost plastering gypsum consists of the following components in percentage by weight: 12.5 percent of causticized white sludge, 1.5 percent of hydroxypropyl methyl cellulose, 3.5 percent of lignocellulose, 1.5 percent of ultrahigh-gel-degree protein powder and the balance of desulfurized gypsum.
Comparative example 1
The ultra-high-gel-degree protein powder in the example 1 is removed, and the rest proportion and the preparation method are unchanged.
Comparative example 2
The ultra-high gel protein powder in the example 1 is replaced by the protein powder with the gel degree of 800g cm-2The rest proportion and the preparation method of the protein powder are unchanged.
Comparative example 3
The causticized white slime in the example 1 was removed, and the rest of the mixture ratio and the preparation method were unchanged.
The plastering gypsum prepared in examples 1 to 3 and comparative examples 1 to 3 were examined as follows according to JC/T517-one 2004 plastering gypsum, the results of which are shown in Table 1.
From the above test data, it can be seen that the low cost stucco gypsum of the invention can meet the standard requirements for stucco gypsum.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. A preparation method of low-cost plastering gypsum is characterized by comprising the following steps:
A. after being pre-dried at the temperature of 80-90 ℃, the desulfurized gypsum enters a boiling calciner, is calcined at the temperature of 120-130 ℃, is added into an impact type flour mill for grinding, and is aged after being cooled;
B. uniformly stirring the aged desulfurized gypsum and the causticized white sludge, repeatedly grinding, and sieving by a 325-mesh sieve;
C. then adding hydroxypropyl methyl cellulose, lignocellulose and ultrahigh-gel-degree protein powder, uniformly stirring, grinding and sieving with a 200-mesh sieve.
2. The method of preparing low cost stucco gypsum of claim 1, wherein the aging time in step a is 7-10 days.
3. The method for preparing low-cost stucco gypsum of claim 1, wherein in the step B, the causticized white slime is paper alkali recovery causticized white slime with water content of 8-15%.
4. The method for preparing low-cost stucco gypsum of claim 1, wherein in step C, the ultra-high gel-degree protein powder is egg.
5. The method of claim 1, wherein the ultra-high gel content protein powder has a gel content of 1200-1400g cm in step C-2。
6. The method of preparing low cost stucco gypsum of claim 1, wherein the low cost stucco gypsum is comprised of the following ingredients by weight percent: 8-15% of causticized white sludge, 1-3% of hydroxypropyl methyl cellulose, 2-5% of lignocellulose, 1-2% of ultrahigh-gelation-degree protein powder and the balance of desulfurized gypsum.
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| CN202010772137.4A CN111908881A (en) | 2020-08-04 | 2020-08-04 | Preparation method of low-cost plastering gypsum |
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| CN202010772137.4A CN111908881A (en) | 2020-08-04 | 2020-08-04 | Preparation method of low-cost plastering gypsum |
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| CN106565180A (en) * | 2016-11-14 | 2017-04-19 | 长兴钦禾建材科技有限公司 | Anion wood-like floor tile and preparation method thereof |
| CN107805020A (en) * | 2017-11-02 | 2018-03-16 | 洪飞飞 | A kind of environment-friendly painting coating for being suitable for classroom |
| CN108996935A (en) * | 2017-06-06 | 2018-12-14 | 丹阳蓝思信息技术有限公司 | A method of cement additive is prepared by raw material of titanium gypsum |
| CN110482886A (en) * | 2019-08-21 | 2019-11-22 | 湖州乌米科技有限公司 | A method of high strength cement is prepared using papermaking waste |
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2020
- 2020-08-04 CN CN202010772137.4A patent/CN111908881A/en active Pending
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| CN101033127A (en) * | 2007-02-09 | 2007-09-12 | 上海大学 | Method for preparing desulfurization plastering gypsum |
| CN101265069A (en) * | 2008-04-29 | 2008-09-17 | 石宗利 | High-strength water-resistant plastering gypsum and producing method thereof |
| CN101497519A (en) * | 2009-01-16 | 2009-08-05 | 重庆大学 | Phosphogypsum based plastering gypsum |
| CN101580372A (en) * | 2009-06-15 | 2009-11-18 | 甘肃省建材科研设计院 | Method for producing high-strength environment-friendly whitewash gypsum by using desulfurization gypsum |
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Application publication date: 20201110 |