CN111792903A - Method for preparing composite material by utilizing desulfurized gypsum - Google Patents
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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
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- 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
- C04B11/00—Calcium sulfate cements
- C04B11/007—After-treatment of the dehydration products, e.g. aging, stabilisation
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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
- C04B11/00—Calcium sulfate cements
- C04B11/02—Methods and apparatus for dehydrating gypsum
- C04B11/028—Devices therefor characterised by the type of calcining devices used therefor or by the type of hemihydrate obtained
- C04B11/036—Devices therefor characterised by the type of calcining devices used therefor or by the type of hemihydrate obtained for the dry process, e.g. dehydrating in a fluidised bed or in a rotary kiln, i.e. to obtain beta-hemihydrate
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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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
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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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/18—Waste materials; Refuse organic
- C04B18/24—Vegetable refuse, e.g. rice husks, maize-ear refuse; Cellulosic materials, e.g. paper, cork
- C04B18/26—Wood, e.g. sawdust, wood shavings
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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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/18—Waste materials; Refuse organic
- C04B18/24—Vegetable refuse, e.g. rice husks, maize-ear refuse; Cellulosic materials, e.g. paper, cork
- C04B18/26—Wood, e.g. sawdust, wood shavings
- C04B18/265—Wood, e.g. sawdust, wood shavings from specific species, e.g. birch
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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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00008—Obtaining or using nanotechnology related materials
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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Abstract
The invention relates to the technical field of building material processing, in particular to a method for preparing a composite material by utilizing desulfurized gypsum, which mainly comprises the steps of pretreating the desulfurized gypsum of wastes, preparing the pretreated desulfurized gypsum into slurry and performing surface modification; and then, pretreating the waste, mixing the waste with a coagulant and a composite auxiliary agent, adding the desulfurized gypsum with the modified surface, reacting for a period of time to prepare slurry, and finally, treating the slurry to form the composite material. The waste desulfurized gypsum is combined with the waste material, so that the advantages of the desulfurized gypsum and the waste material are fully exerted, the production cost is reduced, and the problem of environmental pollution is effectively relieved; according to the invention, through surface modification and addition of various additives, the hardness, strength, impact strength, toughness, waterproofness and corrosion resistance of the composite material are improved, the comprehensive functionality of the desulfurization gypsum composite material is improved, and the method has wide significance.
Description
Technical Field
The invention relates to the technical field of building material processing, in particular to a method for preparing a composite material by utilizing desulfurized gypsum.
Background
At present, more and more flue gas desulfurization projects are invested in construction in China, and a large amount of industrial waste, namely desulfurized gypsum, is discharged along with the implementation of the flue gas desulfurization projects. The desulfurized gypsum becomes the second large solid waste after the fly ash of the thermal power plant, and is discarded and stacked, thereby occupying a large amount of valuable land resources and having adverse effects on the surrounding living environment.
The gypsum powder is one of five gel materials, plays an important role in national economy, and has important influence on national environmental protection and sustainable development strategy by utilizing the desulfurized gypsum. However, the existing research on the desulfurized gypsum only remains the enhancement of functions on single characteristics, the comprehensive functionality is poor, more use functions cannot be well fused, for example, the desulfurized gypsum has higher compressive strength and better flexural strength and tensile strength, and the like, and the existing functional research on the comprehensive aspect of the desulfurized gypsum still needs to be further improved.
The invention provides a method for preparing a composite material by utilizing desulfurized gypsum, which improves the mechanical property, toughness, compactness and the like of the composite material through the action of relevant treatment and additives and promotes the wide application of the composite material.
Disclosure of Invention
Aiming at the problems, the invention aims to improve the comprehensive use efficiency of the waste desulfurized gypsum and solve the problems of serious environmental pollution and poor functionality of the desulfurized gypsum at present. The invention provides a method for preparing a composite material by utilizing desulfurized gypsum, which comprises the following steps:
step S1: pretreatment of raw materials: taking waste desulfurized gypsum as a main raw material, drying the desulfurized gypsum at a low temperature for a period of time, and then calcining at a high temperature to obtain desulfurized gypsum powder;
step S2: preparing desulfurized gypsum slurry and performing surface modification: adding a proper amount of water to the desulfurized gypsum powder calcined in the step S1 to prepare desulfurized gypsum slurry; then adding inorganic salt and adjusting the pH value by using dilute hydrochloric acid; adding a surface modifier, reacting for half an hour, performing suction filtration, washing and drying to obtain the desulfurized gypsum after surface modification;
step S3: pretreatment of waste materials: crushing the waste material to uniform particles;
step S4: mixing the materials: mixing the waste, the coagulant and the composite auxiliary agent, quickly stirring, adding the surface-modified desulfurized gypsum prepared in the step S2, adding a proper amount of water, and uniformly stirring to prepare slurry;
step S5: molding: injecting the slurry obtained in the step S4 into a mould, tamping the mould through vibration, and extruding and forming by adopting heavy pressure;
step S6: and (3) finished product: and standing the formed product, naturally drying, and demolding to finally obtain the composite material prepared by utilizing the desulfurized gypsum.
Preferably, the temperature of the low-temperature drying in the step S1 is 100-300 ℃, and the time is 0.5-1 day; the high-temperature calcination temperature is 400-800 ℃, and the time is 1-2 days, so that the dried desulfurized gypsum powder is obtained.
Preferably, in step S2, the inorganic salt is one or more of potassium chloride, calcium chloride and calcium nitrate, and the amount of the inorganic salt is 4-8% of the mass of the desulfurized gypsum.
Preferably, the pH is adjusted to 8.5-9.5 by using dilute hydrochloric acid in the step S2.
Preferably, in step S2, the surface modifier is one or more of sodium oleate, sodium stearate and ricinoleic acid, and the mass of the surface modifier is 0.3-0.6% of the mass of the desulfurized gypsum.
Preferably, the washing in step S2 is performed 3 times with boiling water of not less than 90 ℃.
Preferably, in step S3, the waste material is one of sawdust and bamboo charcoal powder, or one of waste leftover materials from rock wool board, fiber wool board and calcium silicate ceiling production, and the amount of the waste material is 17-30% of the mass of the desulfurized gypsum.
Preferably, in the step S4, the coagulant is an ultrafine glass fiber coagulant, and the amount of the ultrafine glass fiber coagulant is 2-6% of the mass of the desulfurized gypsum.
Preferably, in the step S4, the amount of the composite assistant is 30% to 40% of the mass of the desulfurized gypsum, and the types and the mass contents of the composite assistant are respectively: 8-10 parts of nano zinc oxide, 4-6 parts of nano aluminum oxide, 3-5 parts of nano silicon dioxide, 3-5 parts of antimony trioxide, 2-4 parts of triethanolamine, 4-6 parts of white mineral oil, 6-10 parts of olive oil, 0.3-0.5 part of tannic acid, 1-2 parts of glyceryl monostearate and 2-4 parts of an aluminate coupling agent.
Preferably, the stirring in step S4 is performed at 800-.
Compared with the prior art, the invention has the following beneficial effects:
(1) the method is suitable for the waste solid desulfurized gypsum and waste desulfurized gypsum slurry, and when the method is applied to the solid waste, the steps are carried out from beginning to end; when the method is applied to liquid slurry, only the first step needs to be removed, and the method has wider application range.
(2) The invention prepares the desulfurized gypsum into slurry, adjusts the pH value by inorganic salt solution and dilute hydrochloric acid, adds a surface modifier for surface modification, and then adds the slurry into auxiliary materials, so that the obtained composite material has high hardness, high strength and strong impact resistance.
(3) The invention adopts waste desulfurized gypsum and waste materials, and combines the waste desulfurized gypsum and the waste materials to prepare the composite material, thereby changing waste into valuable, reducing the production cost, promoting the recycling of the waste materials and effectively relieving the problem of environmental pollution; the advantages of sound absorption, heat insulation, light weight and the like of the waste are combined with the compression resistance, fire resistance and the like of the desulfurized gypsum, so that the functions of the prepared composite material are enhanced.
(4) The invention also adds the coagulant and the composite auxiliary agent, promotes the fusion between the materials, enhances the toughness and the rigidity of the composite material, and improves the deformability; the compactness of the composite material is improved by the composite auxiliary agent, a permeation path can be blocked, and the waterproofness is improved; in addition, the durability of the composite material can be improved, and the corrosion resistance is also enhanced.
Drawings
FIG. 1 is a graph of the test results of the present invention.
FIG. 2 is a schematic flow chart of a method for preparing a composite material by using desulfurized gypsum according to the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention relates to a method for preparing a composite material by utilizing desulfurized gypsum, which is mainly characterized by pretreating the desulfurized gypsum of wastes, preparing the pretreated desulfurized gypsum into slurry and carrying out surface modification to obtain the desulfurized gypsum after surface modification; and then, pretreating the waste, mixing and stirring the waste, a coagulant and a composite auxiliary agent, adding the desulfurized gypsum with the modified surface, reacting for a period of time to prepare slurry, and finally, treating the slurry to form the composite material.
Detailed description of the preferred embodiment 1
Firstly, taking 500g of waste desulfurized gypsum as a main raw material, drying the desulfurized gypsum at 100 ℃ for 1 day, then calcining the desulfurized gypsum at 400 ℃ for 2 days to obtain desulfurized gypsum powder, and adding a proper amount of water into the obtained desulfurized gypsum powder to obtain desulfurized gypsum slurry; then 20g of potassium chloride was added and the pH was adjusted to 8.75 with dilute hydrochloric acid; adding 1.54g of sodium oleate, reacting for half an hour, performing suction filtration, washing for 3 times by using boiling water at the temperature of 95 ℃, and drying to prepare the desulfurized gypsum with the modified surface; next, 100g of waste sawdust was pulverized to uniform particles; then mixing the waste, 10g of ultrafine glass fiber coagulant and 150g of composite auxiliary agent, stirring for 1h at 800r/min, adding the prepared desulfurized gypsum with the modified surface, adding a proper amount of water, and uniformly stirring to obtain slurry; and finally, injecting the obtained slurry into a mold, compacting the mold by vibration, extruding and molding by adopting heavy pressure, standing the molded product, naturally drying, demolding, finally obtaining the composite material prepared by utilizing the desulfurized gypsum, and detecting the performance of the composite material.
In this embodiment, the content of the composite additive is: 12g of nano zinc oxide, 6g of nano alumina, 4.5g of nano silicon dioxide, 4.5g of antimony trioxide, 3g of triethanolamine, 6g of white mineral oil, 15g of olive oil, 0.75g of tannic acid, 1.5g of glycerol monostearate and 6g of aluminate coupling agent.
Specific example 2
Firstly, taking 500g of waste desulfurized gypsum as a main raw material, drying the desulfurized gypsum at 300 ℃ for 0.5 day, then calcining at 800 ℃ for 1.5 days to obtain desulfurized gypsum powder, and adding a proper amount of water into the obtained desulfurized gypsum powder to obtain desulfurized gypsum slurry; then 40g of calcium chloride is added and the pH is adjusted to 9.35 with dilute hydrochloric acid; adding 3.02g of sodium stearate, reacting for half an hour, performing suction filtration, washing for 3 times by using boiling water at 90 ℃, and drying to obtain the desulfurized gypsum with the modified surface; next, 150g of waste bamboo charcoal powder is crushed to uniform particles; then mixing the waste, 30g of the ultrafine glass fiber coagulant and 200g of the composite auxiliary agent, stirring for 0.5h at 1200r/min, adding the prepared desulfurized gypsum with the modified surface, adding a proper amount of water, and uniformly stirring to prepare slurry; and finally, injecting the obtained slurry into a mold, compacting the mold by vibration, extruding and molding by adopting heavy pressure, standing the molded product, naturally drying, demolding, finally obtaining the composite material prepared by utilizing the desulfurized gypsum, and detecting the performance of the composite material.
In this embodiment, the content of the composite additive is: 20g of nano zinc oxide, 12g of nano alumina, 10g of nano silicon dioxide, 10g of antimony trioxide, 8g of triethanolamine, 12g of white mineral oil, 20g of olive oil, 1g of tannic acid, 4g of glycerol monostearate and 8g of an aluminate coupling agent.
Specific example 3
Firstly, taking 500g of waste desulfurized gypsum as a main raw material, drying the desulfurized gypsum at 200 ℃ for 1 day, then calcining the desulfurized gypsum at 700 ℃ for 1 day to obtain desulfurized gypsum powder, and adding a proper amount of water into the obtained desulfurized gypsum powder to obtain desulfurized gypsum slurry; then adding 30g of calcium nitrate, adjusting the pH value to 9.48 by using dilute hydrochloric acid, adding 2.04g of ricinoleic acid, reacting for half an hour, performing suction filtration, washing for 3 times by using boiling water at 96 ℃, and drying to obtain the desulfurized gypsum with the modified surface; next, 130g of rock wool board waste leftover materials are crushed to be uniform in particle size; then mixing the waste, 20g of the ultrafine glass fiber coagulant and 170g of the composite auxiliary agent, stirring for 1h at 900r/min, adding the prepared desulfurized gypsum with the modified surface, adding a proper amount of water, and uniformly stirring to obtain slurry; and finally, injecting the obtained slurry into a mold, compacting the mold by vibration, extruding and molding by adopting heavy pressure, standing the molded product, naturally drying, demolding, finally obtaining the composite material prepared by utilizing the desulfurized gypsum, and detecting the performance of the composite material.
In this embodiment, the content of the composite additive is: 13.6g of nano zinc oxide, 6.8g of nano alumina, 8g of nano silicon dioxide, 8g of antimony trioxide, 3.4g of triethanolamine, 6.8g of white mineral oil, 17g of olive oil, 0.51g of tannic acid, 1.7g of glycerin monostearate and 3.4g of aluminate coupling agent.
In summary, the method for preparing the composite material by using the desulfurized gypsum disclosed in the above embodiments of the invention combines the waste desulfurized gypsum with the waste, fully exerts the advantages of the desulfurized gypsum and the waste, changes waste into valuable, reduces the production cost, promotes the recycling of the waste, and effectively alleviates the problem of environmental pollution; the method is suitable for solid desulfurized gypsum and desulfurized gypsum slurry, improves the hardness, strength, impact strength, toughness, waterproofness and corrosion resistance of the composite material by surface modification and addition of various additives, improves the comprehensive functionality of the desulfurized gypsum composite material, and has wide significance.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can understand that the changes or modifications within the technical scope of the present invention are included in the scope of the present invention, and therefore, the scope of the present invention should be subject to the protection scope of the claims.
Claims (10)
1. A method for preparing a composite material by utilizing desulfurized gypsum is characterized by comprising the following steps: the method comprises the following steps:
step S1: pretreatment of raw materials: taking waste desulfurized gypsum as a main raw material, drying the desulfurized gypsum at a low temperature for a period of time, and then calcining at a high temperature to obtain desulfurized gypsum powder;
step S2: preparing desulfurized gypsum slurry and performing surface modification: adding a proper amount of water to the desulfurized gypsum powder calcined in the step S1 to prepare desulfurized gypsum slurry; then adding inorganic salt and adjusting the pH value by using dilute hydrochloric acid; adding a surface modifier, reacting for half an hour, performing suction filtration, washing and drying to obtain the desulfurized gypsum after surface modification;
step S3: pretreatment of waste materials: crushing the waste material to uniform particles;
step S4: mixing the materials: mixing the waste, the coagulant and the composite auxiliary agent, quickly stirring, adding the surface-modified desulfurized gypsum prepared in the step S2, adding a proper amount of water, and uniformly stirring to prepare slurry;
step S5: molding: injecting the slurry obtained in the step S4 into a mould, tamping the mould through vibration, and extruding and forming by adopting heavy pressure;
step S6: and (3) finished product: and standing the formed product, naturally drying, and demolding to finally obtain the composite material prepared by utilizing the desulfurized gypsum.
2. The method for preparing a composite material using desulfurized gypsum according to claim 1, wherein: the temperature of the low-temperature drying in the step S1 is 100-300 ℃, and the time is 0.5-1 day; the high-temperature calcination temperature is 400-800 ℃, and the time is 1-2 days.
3. The method for preparing a composite material using desulfurized gypsum according to claim 1, wherein: in the step S2, the inorganic salt is one or more of potassium chloride, calcium chloride and calcium nitrate, and the amount of the inorganic salt is 4-8% of the mass of the desulfurized gypsum.
4. The method for preparing a composite material using desulfurized gypsum according to claim 1, wherein: in the step S2, dilute hydrochloric acid is used for adjusting the pH value to 8.5-9.5.
5. The method for preparing a composite material using desulfurized gypsum according to claim 1, wherein: in the step S2, the surface modifier is one or more of sodium oleate, sodium stearate and ricinoleic acid, and the amount of the surface modifier is 0.3-0.6% of the mass of the desulfurized gypsum.
6. The method for preparing a composite material using desulfurized gypsum according to claim 1, wherein: the washing in step S2 was carried out 3 times with boiling water at 90 ℃ or higher.
7. The method for preparing a composite material using desulfurized gypsum according to claim 1, wherein: in the step S3, the waste material is one of sawdust and bamboo charcoal powder, or one of waste leftover materials for producing rock wool boards, fiber cotton boards and calcium silicate ceilings, and the amount of the waste material is 17-30% of the mass of the desulfurized gypsum.
8. The method for preparing a composite material using desulfurized gypsum according to claim 1, wherein: in the step S4, the coagulant is an ultrafine glass fiber coagulant, and the amount of the ultrafine glass fiber coagulant is 2-6% of the mass of the desulfurized gypsum.
9. The method for preparing a composite material using desulfurized gypsum according to claim 1, wherein: in the step S4, the amount of the composite auxiliary agent is 30-40% of the mass of the desulfurized gypsum, and the types and the mass contents of the composite auxiliary agent are respectively as follows: 8-10 parts of nano zinc oxide, 4-6 parts of nano aluminum oxide, 3-5 parts of nano silicon dioxide, 3-5 parts of antimony trioxide, 2-4 parts of triethanolamine, 4-6 parts of white mineral oil, 6-10 parts of olive oil, 0.3-0.5 part of tannic acid, 1-2 parts of glyceryl monostearate and 2-4 parts of an aluminate coupling agent.
10. The method for preparing a composite material using desulfurized gypsum according to claim 1, wherein: the stirring in step S4 is performed at 800-1200r/min for 0.5-1 h.
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2020
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| WO2013048351A1 (en) * | 2011-09-27 | 2013-04-04 | Scg Building Materials Co., Ltd | Gypsum-based composition for construction material and system |
| CN104262850A (en) * | 2014-09-30 | 2015-01-07 | 华中师范大学 | Alpha-hemihydrate gypsum/polyvinyl chloride ordered composite material and preparation method thereof |
| CN104387696A (en) * | 2014-11-06 | 2015-03-04 | 安徽省三乐门窗幕墙工程有限公司 | Energy-saving PVC (polyvinyl chloride) wood-plastic composite material and preparation method thereof |
| CN110092628A (en) * | 2018-01-27 | 2019-08-06 | 山东华美建材有限公司 | A kind of environment-friendly composite material wall body brick and preparation method thereof |
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