CN108706944B - Phosphogypsum light board prepared from barium slag and preparation method thereof - Google Patents
Phosphogypsum light board prepared from barium slag and preparation method thereof Download PDFInfo
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- CN108706944B CN108706944B CN201810745954.3A CN201810745954A CN108706944B CN 108706944 B CN108706944 B CN 108706944B CN 201810745954 A CN201810745954 A CN 201810745954A CN 108706944 B CN108706944 B CN 108706944B
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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
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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
- C04B2111/40—Porous or lightweight materials
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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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
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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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
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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
- 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
Abstract
The invention relates to a phosphogypsum light plate prepared by barium slag and a preparation method thereof, wherein the phosphogypsum light plate comprises the following raw material components in parts by massThe following were used: 10-20 parts of barium slag, 4-10 parts of dihydrate phosphogypsum, 60-80 parts of phosphorus hemihydrate gypsum, 5-15 parts of metakaolin, 1-3 parts of carbide slag, 0.5-1.2 parts of light aggregate, 0-0.1 part of retarder, 0.1-0.3 part of water reducing agent and 0-0.1 part of water-retaining agent. The phosphogypsum light plate prepared by the barium slag provided by the invention has light heat preservation, and the volume weight is 600-fold and 1000Kg/m3The range is adjustable, the heat conductivity coefficient is lower than 0.15W/(m.K), obvious layered cracking does not occur, the problem of shrinkage cracking of the traditional cement board can be effectively solved by the micro-expansibility of gypsum hydration, and various properties of the prepared light board all meet the standard of JGT169-2016 (general technical requirement for light slats for building partitions).
Description
Technical Field
The invention belongs to the technical field of building materials, and relates to a phosphogypsum light board prepared from barium slag and a preparation method thereof.
Background
Phosphogypsum is the most main industrial byproduct in the phosphorus chemical industry of China, and each time 1 ton of P is produced2O5Need to be discharged
4.5-5 tons of phosphogypsum. Because the phosphogypsum contains harmful impurities such as phosphorus, fluorine, organic matters and the like, no effective pretreatment technology can completely eliminate the influence of the impurities at present, so that the additional values of related products prepared by taking the phosphogypsum as a raw material are low, the enthusiasm of enterprises for utilizing the phosphogypsum is not high, and the phosphogypsum is mainly treated by adopting an open-air stockpiling mode. According to statistics, the accumulated phosphogypsum stockpiling in China currently exceeds 3 hundred million tons. The storage amount of the phosphogypsum is increased day by day, not only occupies a large amount of land and wastes resources, but also harmful impurities are leached out along with rainwater to generate acid wastewater, which causes serious pollution and ecological hazard to soil, a water system and the atmosphere.
The barium slag is industrial waste slag generated in the process of producing barium carbonate from barite, and 0.8-1 ton of barium slag is generated when one ton of barium salt is produced. The barium residue contains acid-soluble barium, water-soluble barium, heavy metals, rare earth elements and the like. At present, the barium slag treatment mode is mainly stockpiling, not only occupies a large amount of land resources, but also causes serious pollution to the soil environment due to leaching of harmful ions.
At present, no method for utilizing wastes such as phosphogypsum, barium slag and the like on a large scale exists. Chinese patent CN104058786B discloses a high-performance aerated concrete building material using barium slag and a preparation method thereof, wherein the barium slag is fully utilized, and Ba is autoclaved at high temperature2+With SO4 2-Participate in chemical reaction to generate insoluble BaSO4To Ba2+The curing is carried out, thereby reducing the environmental pollution; chinese patent CN102531500A discloses a barium slag fly ash building block and a production method thereof, which reduces the pollution of barium slag to the environment, replaces clay bricks with wastes and realizes the utilization of wastes. The technical product has single function and low added value, and cannot realize large-scale popularization and application, the phosphogypsum light plate prepared by the barium slag has high product waste utilization rate, light weight, heat preservation and adjustable volume weight, can be used as an assembly type prefabricated component, meets the market demand of the assembly type building at the present stage, has high added value and good market prospect, can solve the major problems of mass stockpiling and environmental pollution of the barium slag and the phosphogypsum, realizes cooperative disposal and resource utilization, and simultaneously promotes the circular sustainable development of multiple industries such as the phosphorus chemical industry and the salt chemical industry.
Disclosure of Invention
The invention aims to solve the technical problem of providing the phosphogypsum light board prepared by using the barium slag and the preparation method thereof, aiming at the defects in the prior art, realizing the cooperative treatment and resource utilization of the barium slag and the phosphogypsum, and the prepared product has the advantages of high waste utilization rate, light weight, heat preservation, adjustable volume weight, no obvious layered cracking, energy saving and environmental protection.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
the phosphogypsum light board prepared by utilizing the barium slag comprises the following raw material components in parts by mass: 10-20 parts of barium slag, 4-10 parts of dihydrate phosphogypsum, 60-80 parts of phosphorus hemihydrate gypsum, 5-15 parts of metakaolin, 1-3 parts of carbide slag, 0.5-1.2 parts of light aggregate, 0-0.1 part of retarder, 0.1-0.3 part of water reducing agent and 0-0.1 part of water-retaining agent;
the phosphorus semi-hydrated gypsum is phosphorus high-strength gypsum and phosphorus building gypsum according to a mass ratio of 4: 1, wherein the 2h flexural strength of the phosphorus high-strength gypsum is more than 6MPa, and the 2h flexural strength of the phosphorus building gypsum is more than 3 MPa.
According to the scheme, the barium slag is industrial waste slag (the main component is BaSO) generated in the barium salt production process4、BaCO3、BaSiO3BaS, some heavy metals and rare earth elements) are dried, ground and sieved, and the residue is not more than 10% after passing through a 80-micron square-hole sieve.
According to the scheme, water (H) is attached to the dihydrate phosphogypsum2O) less than 15 percent, the calcium sulfate dihydrate more than 85 percent, the water-soluble phosphorus pentoxide less than 0.8 percent and the pH value of 1.5-3.
According to the scheme, SiO in the metakaolin250-55% of Al2O3The content is 42-47%, and the 45 μm screen residue is less than 0.005%.
According to the scheme, the carbide slag is obtained by drying and grinding waste slag generated in acetylene preparation and sieving the waste slag through a 80-micrometer square-hole sieve, and the residue on the sieve is not more than 10%.
According to the scheme, the lightweight aggregate is Expanded Polystyrene (EPS) particles, the particle size of the particles is 1-3mm, and the bulk density is 5-12Kg/m3。
According to the scheme, the retarder is a special retarder for gypsum.
According to the scheme, the water reducing agent is a melamine water reducing agent, and the water reducing rate is more than 15%.
According to the scheme, the water retaining agent is hydroxypropyl methyl cellulose ether, and the viscosity is 10000-400000mPa & s.
The invention also comprises a preparation method of the phosphogypsum light board prepared by using the barium slag, which comprises the following steps:
1) weighing the raw materials in proportion for later use;
2) mixing barium slag and dihydrate phosphogypsum according to a solid-to-liquid ratio of 1: 1.6-3, adding water, stirring for 1.5-2.5h at 45-55 ℃ to obtain modified barium residue slurry;
3) adding the modified barium slag slurry obtained in the step 2), phosphorus hemihydrate gypsum, metakaolin, carbide slag, light aggregate, a retarder, a water reducing agent and a water-retaining agent into a stirrer according to requirements, stirring for 3-4min, and then performing injection molding to obtain the phosphogypsum light board.
The invention utilizes the water-soluble and acid-soluble barium ions in the barium slag to react with sulfate ions under the action of the acid medium dihydrate phosphogypsum to generate insoluble barium sulfate, and utilizes the gelatinization of the phosphorus hemihydrate gypsum (the hemihydrate gypsum is hydrated to generate dihydrate gypsum, and dihydrate gypsum crystals are mutually cemented together to form a network structure, and the hydration process can also cement other materials together, thereby playing a role in solidification) to solidify the harmful ions in the barium slag and the phosphogypsum, and realizes the cooperative treatment and resource utilization of the barium slag and the phosphogypsum; hydration products such as calcium silicate hydrate and calcium aluminate hydrate are generated by utilizing the potential hydration activity reaction of metakaolin, the microstructure of a hardened body is optimized, the comprehensive performance of the product is improved, and the generation of the water-resistant hydration products can also protect gypsum crystallization contact points to a certain extent, so that the water resistance of the product is improved; utilizing carbide slag (Ca (OH) as main component)2) The strong basicity of the metakaolin is used for exciting the activity of the metakaolin and reacting with soluble phosphate in the phosphogypsum, so that harmful impurity phosphorus can be solidified and the influence of the harmful impurity phosphorus on the performance of products can be eliminated; the EPS particles with ultra-low volume weight are used as light aggregate, and simultaneously, in the process of preparing modified barium slag slurry, H in acidic dihydrate phosphogypsum+With CO in barium residues3 2-The reaction also introduces part of CO2Gas, and through the regulation and control to the slurry viscosity, realize the high stability of high density difference slurry (the volume weight difference of EPS granule and gypsum slurry is greater than 100 times), realize the light of panel keeps warm, the volume weight is adjustable.
The invention has the beneficial effects that: 1. the phosphogypsum light plate prepared by the barium slag provided by the invention has light heat preservation, and the volume weight is 600-fold and 1000Kg/m3Adjustable in range, the heat conductivity coefficient is lower than 0.15W/(m.K), no obvious layered cracking exists, the micro-expansibility of gypsum hydration can effectively overcome the problem of shrinkage cracking of the traditional cement board, and the prepared lightweight boardAll the properties of the material meet the standard of JGT169-2016 general technical requirement of light batten for building partition walls; 2. the method for preparing the phosphogypsum light board by using the barium slag and the phosphogypsum dihydrate realizes the cooperative treatment and resource utilization of the barium slag and the phosphogypsum, has high waste utilization rate, gives full play to the physical and chemical properties of various wastes, realizes the cooperative treatment and resource utilization of various industrial wastes such as the barium slag, the phosphogypsum and the like, and is energy-saving and environment-friendly.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention is further described in detail with reference to the following examples.
The embodiment of the invention provides a phosphogypsum light board utilizing barium slag and a preparation method thereof. The barium slag used in the embodiment of the invention is industrial waste slag generated in the process of producing barium salt, and the main component of the barium slag is BaSO4、BaCO3、BaSiO3BaS and some heavy metals and rare earth elements are dried and ground, and the residue is not more than 10% after sieving through a 80-micron square-hole sieve; the dihydrate phosphogypsum is original phosphogypsum and attached water (H)2O) less than 15 percent, the calcium sulfate dihydrate is more than 85 percent, the water-soluble phosphorus pentoxide is less than 0.8 percent, and the pH value is 1.5-3; the used phosphorus hemihydrate gypsum is phosphorus high-strength gypsum and phosphorus building gypsum according to the weight ratio of 4: 1 proportion of the mixture, wherein the used high-strength gypsum is produced by Shandong Jinxin novel building materials, Inc., the 2h flexural strength of the high-strength gypsum is more than 6MPa, and the 2h flexural strength of the high-strength gypsum is more than 3 MPa; SiO in the metakaolin250-55% of Al2O3The content is 42-47%, and the residue on 45 μm sieve is less than 0.005%; the carbide slag is obtained by drying and grinding waste slag generated in acetylene preparation and sieving the waste slag through a 80-micrometer square-hole sieve, and the residue on the sieve is not more than 10 percent; the light aggregate is Expanded Polystyrene (EPS) particles with the particle size of 1-3mm and the bulk density of 8Kg/m3(ii) a The retarder is a special retarder for gypsum; the water reducing agent is a melamine water reducing agent, and the water reducing rate is 21%; the water retention agent is hydroxypropyl methyl cellulose ether with the viscosity of 50000mPa & s.
Example 1
The phosphogypsum light board prepared by utilizing the barium slag comprises the following components in parts by weight:
10 parts of barium slag, 4 parts of dihydrate phosphogypsum, 64 parts of high-strength phosphorus gypsum and phosphorus building gypsum (CaSO)4·0.5H2O mass fraction is more than 85%), 16 parts of metakaolin, 5 parts of carbide slag, 1.2 parts of light aggregate, 0.1 part of retarder, 0.2 part of water reducing agent and 0.1 part of water-retaining agent.
The preparation method comprises the following steps:
1) preparing modified barium slag slurry: mixing barium slag and dihydrate phosphogypsum according to a solid-to-liquid ratio of 1: 3, adding water for stirring, and stirring for 1.5 hours at the temperature of 45 ℃ to obtain modified barium slag slurry;
2) and (2) preparing the phosphogypsum light board, namely adding the modified barium slag slurry obtained in the step 1), phosphorus hemihydrate gypsum, metakaolin, carbide slag, light aggregate, a retarder, a water reducing agent and a water-retaining agent into a stirrer, stirring for 4min, and then quickly injecting the stirred slurry into a mould to form the phosphogypsum light board.
The performance test data of the phosphogypsum light board prepared by the embodiment are shown in table 1, and all the performances of the phosphogypsum light board meet the requirements of products with various specifications in JGT169-2016 (general technical requirements for light slats for building partitions).
Example 2
The phosphogypsum light board prepared by utilizing the barium slag comprises the following components in parts by weight:
20 parts of barium slag, 10 parts of dihydrate phosphogypsum, 48 parts of high-strength phosphorus gypsum, 12 parts of phosphorus building gypsum, 10 parts of metakaolin, 3 parts of carbide slag, 0.5 part of light aggregate and 0.3 part of water reducing agent.
The preparation method comprises the following steps:
1) preparing modified barium slag slurry: mixing barium slag and dihydrate phosphogypsum according to a solid-to-liquid ratio of 1: 1.6, adding water, stirring for 2.5 hours at 55 ℃ to obtain modified barium slag slurry;
2) and (2) preparing the phosphogypsum light board, namely adding the modified barium slag slurry obtained in the step 1), phosphorus hemihydrate gypsum, metakaolin, carbide slag, light aggregate, a retarder, a water reducing agent and a water-retaining agent into a stirrer, stirring for 3min, and then quickly injecting the stirred slurry into a mould to form the phosphogypsum light board.
The performance test data of the phosphogypsum light board prepared by the embodiment are shown in table 1, and all the performances of the phosphogypsum light board meet the requirements of products with various specifications in JGT169-2016 (general technical requirements for light slats for building partitions).
Example 3
The phosphogypsum light board prepared by utilizing the barium slag comprises the following components in parts by weight:
15 parts of barium slag, 7 parts of dihydrate phosphogypsum, 60 parts of high-strength phosphorus gypsum, 15 parts of phosphorus building gypsum, 10 parts of metakaolin, 2 parts of carbide slag, 0.8 part of light aggregate, 0.05 part of retarder, 0.1 part of water reducing agent and 0.05 part of water retaining agent.
The preparation method comprises the following steps:
1) preparing modified barium slag slurry: mixing barium slag and dihydrate phosphogypsum according to a solid-to-liquid ratio of 1: 2.3, adding water for mixing, and stirring for 2 hours at 50 ℃ to obtain modified barium slag slurry;
2) and (2) preparing the phosphogypsum light board, namely adding the modified barium slag slurry obtained in the step 1), phosphorus hemihydrate gypsum, metakaolin, carbide slag, light aggregate, a retarder, a water reducing agent and a water-retaining agent into a stirrer, stirring for 4min, and then quickly injecting the stirred slurry into a mould to form the phosphogypsum light board.
The performance test data of the phosphogypsum light board prepared by the embodiment are shown in table 1, and all the performances of the phosphogypsum light board meet the requirements of products with various specifications in JGT169-2016 (general technical requirements for light slats for building partitions).
Example 4
The phosphogypsum light board prepared by utilizing the barium slag comprises the following components in parts by weight:
10 parts of barium slag, 4 parts of dihydrate phosphogypsum, 56 parts of high-strength phosphorus gypsum, 14 parts of phosphorus building gypsum, 15 parts of metakaolin, 3 parts of carbide slag, 0.8 part of light aggregate, 0.05 part of retarder, 0.2 part of water reducing agent and 0.05 part of water retaining agent.
The preparation method comprises the following steps:
1) preparing modified barium slag slurry: mixing barium slag and dihydrate phosphogypsum according to a solid-to-liquid ratio of 1: 3, adding water for stirring, and stirring for 1.5 hours at the temperature of 45 ℃ to obtain modified barium slag slurry;
2) and (2) preparing the phosphogypsum light board, namely adding the modified barium slag slurry obtained in the step 1), phosphorus hemihydrate gypsum, metakaolin, carbide slag, light aggregate, a retarder, a water reducing agent and a water-retaining agent into a stirrer, stirring for 4min, and then quickly injecting the stirred slurry into a mould to form the phosphogypsum light board.
The performance test data of the phosphogypsum light board prepared by the embodiment are shown in table 1, and all the performances of the phosphogypsum light board meet the requirements of products with various specifications in JGT169-2016 (general technical requirements for light slats for building partitions).
Example 5
The phosphogypsum light board prepared by utilizing the barium slag comprises the following components in parts by weight:
12 parts of barium slag, 6 parts of dihydrate phosphogypsum, 60 parts of high-strength phosphorus gypsum, 15 parts of phosphorus building gypsum, 8 parts of metakaolin, 2 parts of carbide slag, 0.8 part of light aggregate, 0.1 part of retarder, 0.2 part of water reducing agent and 0.05 part of water retaining agent.
The preparation method comprises the following steps:
1) preparing modified barium slag slurry: mixing barium slag and dihydrate phosphogypsum according to a solid-to-liquid ratio of 1: 2.7 adding water for mixing, and stirring for 2 hours at 50 ℃ to obtain modified barium slag slurry;
2) and (2) preparing the phosphogypsum light board, namely adding the modified barium slag slurry obtained in the step 1), phosphorus hemihydrate gypsum, metakaolin, carbide slag, light aggregate, a retarder, a water reducing agent and a water-retaining agent into a stirrer, stirring for 4min, and then quickly injecting the stirred slurry into a mould to form the phosphogypsum light board.
The performance test data of the phosphogypsum light board prepared by the embodiment are shown in table 1, and all the performances of the phosphogypsum light board meet the requirements of products with various specifications in JGT169-2016 (general technical requirements for light slats for building partitions).
The lightweight boards prepared in examples 1-5 above were tested for performance, and the results are shown in Table 1:
TABLE 1
It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.
Claims (10)
1. The phosphogypsum light board prepared by using the barium slag is characterized by comprising the following raw materials in parts by mass: 10-20 parts of barium slag, 4-10 parts of dihydrate phosphogypsum, 60-80 parts of phosphorus hemihydrate gypsum, 5-15 parts of metakaolin, 1-3 parts of carbide slag, 0.5-1.2 parts of light aggregate, 0-0.1 part of retarder, 0.1-0.3 part of water reducing agent and 0-0.1 part of water-retaining agent;
the phosphorus semi-hydrated gypsum is phosphorus high-strength gypsum and phosphorus building gypsum according to a mass ratio of 4: 1, wherein the 2h flexural strength of the phosphorus high-strength gypsum is more than 6MPa, and the 2h flexural strength of the phosphorus building gypsum is more than 3 MPa.
2. The phosphogypsum light board prepared by utilizing the barium slag as claimed in claim 1, is characterized in that the barium slag is obtained by drying, grinding and sieving industrial waste slag generated in the process of producing barium salt, and the residue of the industrial waste slag is not more than 10% after being sieved by a 80-micron square-hole sieve.
3. The phosphogypsum light board prepared by using the barium slag as claimed in claim 1, wherein the mass fraction of the attached water in the dihydrate phosphogypsum is less than 15%, the mass fraction of the dihydrate calcium sulfate is more than 85%, the mass fraction of the water-soluble phosphorus pentoxide is less than 0.8%, and the pH value is 1.5-3.
4. The phosphogypsum light board prepared by using barium slag as claimed in claim 1, wherein SiO in metakaolin is SiO250-55% of Al2O342-47% of 45 μm sieve residueLess than 0.005%.
5. The phosphogypsum light board prepared by using the barium slag as claimed in claim 1, which is characterized in that the calcium carbide slag is obtained by drying and grinding waste slag generated in the preparation of acetylene and sieving the waste slag by a 80-micron square-hole sieve, and the screen residue is not more than 10%.
6. The phosphogypsum light board prepared by using barium slag as claimed in claim 1, wherein the light aggregate is expanded polystyrene particles, the particle size of the particles is 1-3mm, and the bulk density is 5-12Kg/m3。
7. The phosphogypsum light board prepared by utilizing the barium slag as claimed in claim 1, which is characterized in that the retarder is a retarder special for gypsum.
8. The phosphogypsum light board prepared by utilizing the barium slag as claimed in claim 1, which is characterized in that the water reducing agent is a melamine water reducing agent, and the water reducing rate is more than 15%.
9. The phosphogypsum light board prepared by utilizing barium slag as claimed in claim 1, which is characterized in that the water-retaining agent is hydroxypropyl methyl cellulose ether with viscosity of 10000-400000 mPa-s.
10. A method for preparing a phosphogypsum light board prepared by using barium slag according to any one of claims 1 to 9, which is characterized by comprising the following steps:
1) weighing the raw materials in proportion for later use;
2) mixing barium slag and dihydrate phosphogypsum according to a solid-to-liquid ratio of 1: 1.6-3, adding water, stirring for 1.5-2.5h at 45-55 ℃ to obtain modified barium residue slurry;
3) adding the modified barium slag slurry obtained in the step 2), phosphorus hemihydrate gypsum, metakaolin, carbide slag, light aggregate, a retarder, a water reducing agent and a water-retaining agent into a stirrer according to requirements, stirring for 3-4min, and then performing injection molding to obtain the phosphogypsum light board.
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| CN110105039B (en) * | 2019-05-20 | 2019-12-06 | 湖北工业大学 | preparation method of anhydrous phosphogypsum-based assembled light partition wall batten |
| CN113979659A (en) * | 2021-10-25 | 2022-01-28 | 赵源 | Modified beta-phosphogypsum and modification method thereof, modifier for beta-phosphogypsum and application method thereof |
| CN113996639A (en) * | 2021-11-03 | 2022-02-01 | 贵州省化工研究院 | Synergistic harmless treatment method for barium slag and phosphogypsum |
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| SU767049A1 (en) * | 1978-12-18 | 1980-09-30 | Казахский Химико-Технологический Институт | Binder |
| WO2009075598A1 (en) * | 2007-12-11 | 2009-06-18 | Andrey Yakovlevich Konovalov | Waterproof gypsum binder- gypsovit |
| RU2010105665A (en) * | 2007-12-11 | 2011-08-27 | Андрей Яковлевич Коновалов (RU) | WATERPROOF GYPSUM BINDER - GYPSUM |
| CN102531500A (en) * | 2012-01-06 | 2012-07-04 | 安顺市华洋新型建材有限责任公司 | Barium residue coal ash building block and production method thereof |
| CN103316888A (en) * | 2012-03-22 | 2013-09-25 | 黄家鹄 | Non-toxic treatment method for soluble barium component-containing barium industry waste residue |
| CN104058786B (en) * | 2014-07-04 | 2016-01-06 | 武汉理工大学 | A kind of high-performance aerated concrete material of construction utilizing barium slag and preparation method thereof |
| CN105777039B (en) * | 2016-03-31 | 2018-01-12 | 武汉理工大学 | A kind of ardealite base light thermal insulation board and preparation method thereof |
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