CN112321251A - Preparation method of gypsum product - Google Patents
Preparation method of gypsum product Download PDFInfo
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- CN112321251A CN112321251A CN202011113544.0A CN202011113544A CN112321251A CN 112321251 A CN112321251 A CN 112321251A CN 202011113544 A CN202011113544 A CN 202011113544A CN 112321251 A CN112321251 A CN 112321251A
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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
- C04B28/145—Calcium sulfate hemi-hydrate with a specific crystal form
- C04B28/146—Calcium sulfate hemi-hydrate with a specific crystal form alpha-hemihydrate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/14—Producing shaped prefabricated articles from the material by simple casting, the material being neither forcibly fed nor positively compacted
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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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/38—Fibrous materials; Whiskers
- C04B14/383—Whiskers
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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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/023—Chemical treatment
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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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/51—Metallising, e.g. infiltration of sintered ceramic preforms with molten metal
- C04B41/5144—Metallising, e.g. infiltration of sintered ceramic preforms with molten metal with a composition mainly composed of one or more of the metals of the iron group
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/60—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only artificial stone
- C04B41/61—Coating or impregnation
- C04B41/65—Coating or impregnation with inorganic materials
- C04B41/69—Metals
-
- 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)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Civil Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
Abstract
The invention discloses a preparation method of a gypsum product, which mainly solves the problems that the gypsum product prepared by the existing preparation method in the prior art has limited flexural strength and compressive strength, and impurities contained in a finished product influence the overall aesthetic property of the finished product. The preparation method of the gypsum product comprises the steps of uniformly mixing the slurry, half of the alloy powder, the dispersible latex powder and the petroleum resin, pouring the mixture into a grinding tool, cooling the mixture for 40 minutes to obtain a semi-finished product, putting the semi-finished product into the coating slurry for outer surface coating treatment, and naturally drying the coating slurry to obtain the gypsum product. Through the scheme, the invention achieves the aims that only the strength and the folding resistance can be effectively ensured, the moisture resistance of the product exceeds that of the existing products of the same type, and the product has high practical value and popularization value.
Description
Technical Field
The invention relates to a method for manufacturing a gypsum product, in particular to a method for preparing a gypsum product.
Background
Natural gypsum resources in China are increasingly exhausted, a byproduct phosphogypsum in the industrial gypsum industry is industrial solid waste generated in the process of producing phosphoric acid by a wet method, and about 4-5 tons of phosphogypsum are discharged when 1 ton of phosphoric acid is produced; the industrial gypsum is accumulated in a large amount, the accumulated accumulation amount exceeds 3 hundred million tons, and if the industrial gypsum is not treated and utilized well, a severe environmental problem is generated; therefore, the resource utilization of the industrial byproduct phosphogypsum is always a concern of the country, the industry and the society.
The most commonly used method for treating the industrial byproduct phosphogypsum is backfilling a pit, producing a cement flocculant, preparing ammonium sulfate and calcium carbonate and improving alkaline soil. The methods promote the technical development of phosphogypsum recycling in China, but have the defects of potential safety and pollution hazards, long flow, large investment and the like, and cannot fundamentally solve the current situations of potential environmental safety hazards and low utilization rate of industrial byproduct phosphogypsum; the phosphogypsum is also proposed to be made into a gypsum product to be put into use again, but the gypsum product made by the existing manufacturing method has limited flexural strength and compressive strength and cannot meet the use requirement, and impurities contained in the finished product influence the integral aesthetic property of the product.
Disclosure of Invention
The invention aims to provide a preparation method of a gypsum product, which aims to solve the problems that the fracture resistance and the compressive strength of the gypsum product prepared by the existing preparation method are limited, and the overall aesthetic property of the gypsum product is influenced by impurities contained in the finished product.
In order to solve the above problems, the present invention provides the following technical solutions:
a preparation method of a gypsum product comprises the following steps:
s1, mixing and stirring uniformly 50-80 parts of alpha gypsum, 15-25 parts of modified gypsum whisker and 25-50 parts of fly ash to obtain mixed powder;
s2, mixing and stirring the mixed powder, 15-25 parts of graphite fiber, 10-20 parts of poly (p-phenylene terephthalamide) fiber, 8-16 parts of diatom ooze, 3-6 parts of liquid paraffin, 7-16 parts of talcum powder, 10-20 parts of quick lime and water to obtain slurry;
s3, smelting 15-26 parts of ferroferric oxide, 3-10 parts of titanium powder and 5-13 parts of nickel powder to prepare alloy, and grinding to obtain alloy powder;
s4, uniformly mixing the slurry, half of the alloy powder, 2-5 parts of dispersible latex powder and 2-5 parts of petroleum resin, pouring the mixture into a grinding tool, and cooling for 40 minutes to obtain a half-finished product;
s5, half of alloy powder, 3-8 parts of graphite powder, 3-10 parts of quartz sand and water are uniformly stirred to obtain coating slurry
And S6, putting the semi-finished product into the coating slurry for outer surface coating treatment, and naturally drying to obtain the gypsum product.
Further, the preparation process of the alpha gypsum comprises the following steps: uniformly stirring 18-22 parts of CaO, 100-120 parts of industrial phosphogypsum and distilled water, and standing for more than 48 hours to obtain a mixed solution of which the supernatant is a precipitate; and then adding the mixed solution with the solid-liquid ratio of 0.8-1:5-5.2 into a reaction kettle, adding 10 parts of trans-crystallizing agent maleic acid and 5 parts of sodium chloride powder, cooling to separate out crystals after hydrothermal reaction, and drying in the air after separation to obtain the alpha gypsum powder.
Further, the temperature of the hydrothermal reaction is 140 ℃.
Further, the time of the hydrothermal reaction is 2 h.
Further, the pH value of the hydrothermal reaction is 4.
Further, the manufacturing process of the modified gypsum whisker comprises the following steps: and (2) carrying out hydrothermal reaction on 5-7 parts of glutaraldehyde crosslinked vinyl alcohol, 2-5 parts of stearic acid, 3-5 parts of silane coupling agent and 40-80 parts of gypsum whisker, and then naturally drying in the air to obtain the modified gypsum whisker.
Furthermore, the hydrothermal reaction temperature is 120-180 degrees.
Furthermore, the hydrothermal reaction time of the modified gypsum whisker preparation method is 3-5 h.
Compared with the prior art, the invention has the following beneficial effects:
(1) the components of the invention have synergistic effect, and the powder, the slurry and the alloy powder are separately processed in the manufacturing process to prepare a semi-finished product, and then the semi-finished product is coated with the coating slurry to finally form the gypsum product, so that the strength and the folding resistance can be effectively ensured, and the moisture resistance of the gypsum product is better than that of the existing products of the same type.
(2) In the invention, a large amount of industrial byproduct phosphogypsum is needed in the alpha gypsum preparation process, CaO is adopted to pretreat the industrial phosphogypsum, and soluble impurities F and P in the industrial phosphogypsum are converted into indissolvable impurities CaHPO4.2H2O and CaF2The interference of soluble impurities F and P to the growth process of the alpha gypsum crystal is effectively avoided, so that the breaking strength and the compressive strength of the alpha gypsum crystal are effectively guaranteed; thereby ensuring the flexural strength and the compressive strength of the gypsum product, changing waste into valuables, reasonably treating the industrial byproduct phosphogypsum and relieving the environmental crisis.
(3) The reaction time, temperature and pH value adopted in the alpha gypsum manufacturing process effectively ensure the generation of alpha gypsum crystals and the flexural strength and compressive strength of the alpha gypsum crystals, and the flexural strength and compressive strength of the alpha gypsum crystals are 1.82/4.6MPa and 3.25/8.4MPa respectively after 2 hours and 3 d; exceeds the prior alpha gypsum crystal of the same type.
(4) The modified gypsum whisker prepared by the method for preparing the modified gypsum whisker has higher mechanical property, toughness and heat resistance than the prior products of the same type.
Detailed Description
The present invention is further illustrated by the following examples, which include, but are not limited to, the following examples.
Example 1
A method of making a gypsum product comprising the steps of:
s1, mixing and stirring uniformly 50 parts of alpha gypsum, 15 parts of modified gypsum whisker and 25 parts of fly ash to obtain mixed powder;
s2, mixing and stirring the mixed powder, 15 parts of graphite fiber, 10 parts of poly (p-phenylene terephthalamide) fiber, 8 parts of diatom ooze, 3 parts of liquid paraffin, 7 parts of talcum powder, 10 parts of quick lime and water to obtain slurry;
s3, smelting 15 parts of ferroferric oxide, 3 parts of titanium powder and 5 parts of nickel powder to prepare alloy, and grinding to obtain alloy powder;
s4, uniformly mixing the slurry, half of the alloy powder, 2 parts of dispersible latex powder and 2 parts of petroleum resin, pouring the mixture into a grinding tool, and cooling for 40 minutes to obtain a semi-finished product;
s5, half of alloy powder, 3 parts of graphite powder, 3 parts of quartz sand and water are uniformly stirred to obtain coating slurry
And S6, putting the semi-finished product into the coating slurry for outer surface coating treatment, and naturally drying to obtain the gypsum product.
Wherein, the preparation process of the alpha gypsum is as follows: stirring 18 parts of CaO, 100 parts of industrial phosphogypsum and distilled water uniformly, and standing for more than 48 hours to obtain a mixed solution of which the supernatant is a precipitate; then adding the mixed solution with the solid-to-liquid ratio of 0.8:5 into a reaction kettle, adding 10 parts of trans-crystallizing agent maleic acid and 5 parts of sodium chloride powder, cooling to separate out crystals after hydrothermal reaction, and drying in the air after separation to obtain alpha gypsum powder; wherein the temperature of the hydrothermal reaction is 140 ℃, the time is 2h, and the pH value is 4.
The modified gypsum whisker is obtained by carrying out hydrothermal reaction on 5 parts of glutaraldehyde crosslinked vinyl alcohol, 2 parts of stearic acid, 3 parts of a silane coupling agent and 40 parts of gypsum whisker, and then naturally drying in the air, wherein the hydrothermal reaction temperature is 120 degrees, and the thermal reaction time is 3 hours.
Example 2
A method of making a gypsum product comprising the steps of:
s1, mixing and stirring 60 parts of alpha gypsum, 20 parts of modified gypsum whisker and 40 parts of fly ash uniformly to obtain mixed powder;
s2, mixing and stirring the mixed powder, 20 parts of graphite fiber, 15 parts of poly (p-phenylene terephthalamide) fiber, 13 parts of diatom ooze, 4 parts of liquid paraffin, 10 parts of talcum powder, 15 parts of quick lime and water to obtain slurry;
s3, smelting 22 parts of ferroferric oxide, 6 parts of titanium powder and 8 parts of nickel powder to prepare alloy, and grinding to obtain alloy powder;
s4, uniformly mixing the slurry, half of the alloy powder, 3 parts of dispersible latex powder and 3 parts of petroleum resin, pouring the mixture into a grinding tool, and cooling for 40 minutes to obtain a semi-finished product;
s5, half of alloy powder, 5 parts of graphite powder, 7 parts of quartz sand and water are uniformly stirred to obtain coating slurry
And S6, putting the semi-finished product into the coating slurry for outer surface coating treatment, and naturally drying to obtain the gypsum product.
Wherein, the preparation process of the alpha gypsum is as follows: uniformly stirring 20 parts of CaO, 115 parts of industrial phosphogypsum and distilled water, and standing for more than 48 hours to obtain a mixed solution of which the supernatant is a precipitate; then adding the mixed solution with the solid-liquid ratio of 0.9:5.1 into a reaction kettle, adding 10 parts of trans-crystallizing agent maleic acid and 5 parts of sodium chloride powder, cooling to separate out crystals after hydrothermal reaction, and drying in the air after separation to obtain alpha gypsum powder; wherein the temperature of the hydrothermal reaction is 140 ℃, the time is 2h, and the pH value is 4.
Wherein 6 parts of glutaraldehyde crosslinked vinyl alcohol, 4 parts of stearic acid, 4 parts of silane coupling agent and 67 parts of gypsum whisker are subjected to hydrothermal reaction and then naturally dried to obtain the modified gypsum whisker, the hydrothermal reaction temperature is 120-180 degrees, and the thermal reaction time is 4 hours.
Example 3
A method of making a gypsum product comprising the steps of:
s1, mixing and stirring 0 part of alpha gypsum, 25 parts of modified gypsum whisker and 50 parts of fly ash uniformly to obtain mixed powder;
s2, mixing and stirring the mixed powder, 25 parts of graphite fiber, 20 parts of poly (p-phenylene terephthalamide) fiber, 16 parts of diatom ooze, 6 parts of liquid paraffin, 16 parts of talcum powder, 20 parts of quick lime and water to obtain slurry;
s3, smelting 26 parts of ferroferric oxide, 10 parts of titanium powder and 13 parts of nickel powder to prepare alloy, and grinding to obtain alloy powder;
s4, uniformly mixing the slurry, half of the alloy powder, 5 parts of dispersible latex powder and 5 parts of petroleum resin, pouring the mixture into a grinding tool, and cooling for 40 minutes to obtain a semi-finished product;
s5, half of alloy powder, 8 parts of graphite powder, 10 parts of quartz sand and water are uniformly stirred to obtain coating slurry
And S6, putting the semi-finished product into the coating slurry for outer surface coating treatment, and naturally drying to obtain the gypsum product.
Wherein, the preparation process of the alpha gypsum is as follows: uniformly stirring 22 parts of CaO, 120 parts of industrial phosphogypsum and distilled water, and standing for more than 48 hours to obtain a mixed solution of which the supernatant is a precipitate; then adding a mixed solution with a solid-to-liquid ratio of 1:5.2 into a reaction kettle, adding 10 parts of trans-crystallizing agent maleic acid and 5 parts of sodium chloride powder, cooling to separate out crystals after hydrothermal reaction, and drying in the air after separation to obtain alpha gypsum powder; wherein the temperature of the hydrothermal reaction is 140 ℃, the time is 2h, and the pH value is 4.
Wherein, after hydrothermal reaction, 7 parts of glutaraldehyde crosslinked vinyl alcohol, 5 parts of stearic acid, 5 parts of silane coupling agent and 80 parts of gypsum whisker are naturally dried to obtain the modified gypsum whisker, the hydrothermal reaction temperature is 180 degrees, and the thermal reaction time is 5 hours.
Comparative example 1
The alpha gypsum is a conventional product on the market, and other steps are the same as in example 1.
Comparative example 2
The modified gypsum whisker is a conventional gypsum whisker on the market, and other steps are the same as in example 1.
Comparative example 3
The alpha gypsum is a conventional product on the market, the modified gypsum whisker is a conventional gypsum whisker on the market, and other steps are the same as in example 1.
Comparative example 4
The hydrothermal reaction temperature in the preparation of the alpha gypsum is 100 degrees, and other steps are the same as the example 1.
Comparative example 5
The hydrothermal reaction time in the preparation of the alpha gypsum is 1h, and other steps are the same as those of the example 1.
Comparative example 6
The hydrothermal reaction pH in the preparation of alpha gypsum was 6, and the other steps were the same as in example 1.
The gypsum products prepared in examples 1-3 and comparative examples 1-6 were subjected to strength tests including 28d flexural strength and 28d compressive strength, and bending toughness tests using an MEW-40 wood universal tester, loading at three points, loading rate of 1mm/min, analysis of load-deflection, load of 100N; the results are given in the following table:
from the above table, it can be seen that the present invention provides a method for producing high toughness and high strength gypsum products, which can be widely used in various industries such as building blocks, building ceilings, etc., wherein a large amount of industrial by-product phosphogypsum is needed, and during the production of alpha gypsum, CaO is adopted to pretreat the industrial phosphogypsum, and convert the soluble impurities F and P in the industrial phosphogypsum into insoluble impurities CaHPO4.2H2O and CaF2The interference of soluble impurities F and P to the growth process of the alpha gypsum crystal is effectively avoided, so that the breaking strength and the compressive strength of the alpha gypsum crystal are effectively guaranteed.
The invention is well implemented in accordance with the above-described embodiments. It should be noted that, based on the above structural design, in order to solve the same technical problems, even if some insubstantial modifications or colorings are made on the present invention, the adopted technical solution is still the same as the present invention, and therefore, the technical solution should be within the protection scope of the present invention.
Claims (8)
1. A method for preparing a gypsum product, comprising the steps of:
s1, mixing and stirring uniformly 50-80 parts of alpha gypsum, 15-25 parts of modified gypsum whisker and 25-50 parts of fly ash to obtain mixed powder;
s2, mixing and stirring the mixed powder, 15-25 parts of graphite fiber, 10-20 parts of poly (p-phenylene terephthalamide) fiber, 8-16 parts of diatom ooze, 3-6 parts of liquid paraffin, 7-16 parts of talcum powder, 10-20 parts of quick lime and water to obtain slurry;
s3, smelting 15-26 parts of ferroferric oxide, 3-10 parts of titanium powder and 5-13 parts of nickel powder to prepare alloy, and grinding to obtain alloy powder;
s4, uniformly mixing the slurry, half of the alloy powder, 2-5 parts of dispersible latex powder and 2-5 parts of petroleum resin, pouring the mixture into a grinding tool, and cooling for 40 minutes to obtain a half-finished product;
s5, half of alloy powder, 3-8 parts of graphite powder, 3-10 parts of quartz sand and water are uniformly stirred to obtain coating slurry
And S6, putting the semi-finished product into the coating slurry for outer surface coating treatment, and naturally drying to obtain the gypsum product.
2. The method for preparing the gypsum product according to claim 1, wherein the alpha gypsum is prepared by the following steps: uniformly stirring 18-22 parts of CaO, 100-120 parts of industrial phosphogypsum and distilled water, and standing for more than 48 hours to obtain a mixed solution of which the supernatant is a precipitate; and then adding the mixed solution with the solid-liquid ratio of 0.8-1:5-5.2 into a reaction kettle, adding 10 parts of trans-crystallizing agent maleic acid and 5 parts of sodium chloride powder, cooling to separate out crystals after hydrothermal reaction, and drying in the air after separation to obtain the alpha gypsum powder.
3. The method of claim 2, wherein the hydrothermal reaction is carried out at a temperature of 140 °.
4. The method of claim 2, wherein the hydrothermal reaction is carried out for a period of 2 hours.
5. The method of claim 2, wherein the hydrothermal reaction has a PH of 4.
6. The method for preparing the gypsum product according to claim 1, wherein the modified gypsum whisker is prepared by the following steps: and (2) carrying out hydrothermal reaction on 5-7 parts of glutaraldehyde crosslinked vinyl alcohol, 2-5 parts of stearic acid, 3-5 parts of silane coupling agent and 40-80 parts of gypsum whisker, and then naturally drying in the air to obtain the modified gypsum whisker.
7. The method of claim 6, wherein the hydrothermal reaction temperature is 120 ° to 180 °.
8. The method for preparing a gypsum product according to claim 6, wherein the modified gypsum whisker is prepared by a hydrothermal reaction for 3-5 h.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130074737A1 (en) * | 2011-09-23 | 2013-03-28 | Georgia-Pacific Gypsum Llc | Low thermal transmission building material |
| CN104628274A (en) * | 2014-12-03 | 2015-05-20 | 昆明理工大学 | Method and device for preparing high-strength alpha hemihydrate gypsum by using phosphogypsum |
| CN108147765A (en) * | 2017-12-28 | 2018-06-12 | 应城市嘉鸿技术服务科技有限公司 | A kind of high strength gypsum product and preparation method thereof |
| CN110922149A (en) * | 2019-11-19 | 2020-03-27 | 荆门千年健医疗保健科技有限公司 | High-toughness high-strength gypsum product and preparation method thereof |
-
2020
- 2020-10-17 CN CN202011113544.0A patent/CN112321251A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130074737A1 (en) * | 2011-09-23 | 2013-03-28 | Georgia-Pacific Gypsum Llc | Low thermal transmission building material |
| CN104628274A (en) * | 2014-12-03 | 2015-05-20 | 昆明理工大学 | Method and device for preparing high-strength alpha hemihydrate gypsum by using phosphogypsum |
| CN108147765A (en) * | 2017-12-28 | 2018-06-12 | 应城市嘉鸿技术服务科技有限公司 | A kind of high strength gypsum product and preparation method thereof |
| CN110922149A (en) * | 2019-11-19 | 2020-03-27 | 荆门千年健医疗保健科技有限公司 | High-toughness high-strength gypsum product and preparation method thereof |
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Application publication date: 20210205 |