CN115321856B - Inorganic cementing material containing aluminum sulfate waste residues and preparation method thereof - Google Patents
Inorganic cementing material containing aluminum sulfate waste residues and preparation method thereof Download PDFInfo
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- CN115321856B CN115321856B CN202210890661.0A CN202210890661A CN115321856B CN 115321856 B CN115321856 B CN 115321856B CN 202210890661 A CN202210890661 A CN 202210890661A CN 115321856 B CN115321856 B CN 115321856B
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- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 title claims abstract description 96
- 239000002699 waste material Substances 0.000 title claims abstract description 96
- 239000000463 material Substances 0.000 title claims abstract description 45
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 229910000323 aluminium silicate Inorganic materials 0.000 claims abstract description 34
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims abstract description 34
- 238000000034 method Methods 0.000 claims abstract description 8
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 6
- 239000004566 building material Substances 0.000 claims abstract description 5
- 239000000843 powder Substances 0.000 claims description 38
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical group [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 27
- 235000019353 potassium silicate Nutrition 0.000 claims description 26
- 239000003245 coal Substances 0.000 claims description 11
- 238000001354 calcination Methods 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 9
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 8
- 238000000227 grinding Methods 0.000 claims description 6
- 239000002002 slurry Substances 0.000 claims description 6
- 235000011128 aluminium sulphate Nutrition 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 238000000498 ball milling Methods 0.000 claims description 3
- 239000011812 mixed powder Substances 0.000 claims description 3
- 238000007873 sieving Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 2
- 239000001164 aluminium sulphate Substances 0.000 claims 2
- BUACSMWVFUNQET-UHFFFAOYSA-H dialuminum;trisulfate;hydrate Chemical compound O.[Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O BUACSMWVFUNQET-UHFFFAOYSA-H 0.000 claims 2
- 239000002440 industrial waste Substances 0.000 abstract description 7
- 239000002994 raw material Substances 0.000 abstract description 5
- 238000003912 environmental pollution Methods 0.000 abstract description 4
- 239000002910 solid waste Substances 0.000 abstract description 4
- 238000004134 energy conservation Methods 0.000 abstract description 3
- 230000009467 reduction Effects 0.000 abstract description 3
- 239000011398 Portland cement Substances 0.000 abstract description 2
- 238000013459 approach Methods 0.000 abstract description 2
- 238000004064 recycling Methods 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 24
- 239000004568 cement Substances 0.000 description 7
- 239000002893 slag Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 239000012190 activator Substances 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910000329 aluminium sulfate Inorganic materials 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000001878 scanning electron micrograph Methods 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000006253 efflorescence Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000008394 flocculating agent Substances 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000011268 mixed slurry Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 206010037844 rash Diseases 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- RLQWHDODQVOVKU-UHFFFAOYSA-N tetrapotassium;silicate Chemical compound [K+].[K+].[K+].[K+].[O-][Si]([O-])([O-])[O-] RLQWHDODQVOVKU-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- 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
- C04B12/00—Cements not provided for in groups C04B7/00 - C04B11/00
- C04B12/005—Geopolymer cements, e.g. reaction products of aluminosilicates with alkali metal hydroxides or silicates
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
Abstract
The invention discloses an inorganic cementing material containing aluminum sulfate waste residues and a preparation method thereof, belonging to the technical field of industrial waste residue treatment. The method takes the aluminum sulfate waste residue and the active aluminosilicate as raw materials, provides an environment-friendly approach for the disposal of industrial waste residue, and does not cause pollution to the environment; the aluminum sulfate waste residue and the active aluminosilicate with specific mass ratio are adopted, and the hardened body with certain compressive strength and tensile strength can be prepared after being excited by the exciting agent, so that the doping amount of the aluminum sulfate waste residue is greatly increased, and the aluminum sulfate waste residue is effectively utilized; the whiskering phenomenon of the cementing material is effectively controlled by adding the excitant with specific modulus and concentration; from the perspective of energy conservation and emission reduction, the invention can realize that the raw materials for preparing the material are all solid wastes, thereby greatly reducing the environmental pollution; the inorganic cementing material prepared by the invention can replace the traditional portland cement, and has good application prospect in the aspects of industrial waste residue recycling and building material preparation.
Description
Technical Field
The invention relates to the technical field of industrial waste residue treatment, in particular to an inorganic cementing material containing aluminum sulfate waste residue and a preparation method thereof.
Background
The aluminum sulfate waste residue is a solid waste produced in the production of aluminum sulfate, and accounts for about 20-30% of the yield of aluminum sulfate, the existing disposal mode of the aluminum sulfate waste residue mainly takes a stacking position as a main mode, the land is occupied by the disposal mode, and the leachate of the aluminum sulfate waste residue also pollutes underground water; the accumulation of the aluminum sulfate waste residues limits the expansion of the capacity of enterprises and becomes a burden for the enterprises and the society, so the aluminum sulfate waste residues are pollutants to be treated urgently, and the economic, effective and large-scale utilization of the aluminum sulfate waste residues is a problem to be solved.
Because the aluminum sulfate waste residue is rich in silicon dioxide and contains a certain amount of aluminum, the aluminum sulfate waste residue is often used for preparing chemical raw materials and products such as water glass, white carbon black, polysilicic acid series flocculating agents and the like in industry, but new solid wastes are usually generated in the preparation process of industrial products, the utilization rate and the utilization amount of the waste residue are low, and the cost and the energy consumption are high. Some researchers try to improve the hydration and mechanical properties of cement by adding aluminum sulfate waste residue as an admixture directly into the cement; if a proper amount of aluminum sulfate waste residue is added (less than 10 percent), the 28d compressive strength of the cement can be improved by more than 2 MPa; when the waste aluminium sulfate slag replaces partial slag with 3-10% of waste aluminium sulfate slag as a mixed material, the cement setting time can be shortened, but the water requirement for the standard consistency is obviously increased. Further research shows that the alkali-activated activity of the calcined aluminum sulfate waste residue is improved, but the utilization energy consumption and the cost are high, sulfur dioxide is generated in the calcining process, air pollution is caused, and large-scale utilization is difficult to realize. At present, the doping amount of the aluminum sulfate waste residue in the base material does not exceed 10%, and the improvement of the doping amount is beneficial to the resource utilization of the waste residue. Meanwhile, gangue rich in silicon and aluminum such as coal gangue and red mud ore also causes great burden to the environment, and the gangue can generate volcanic ash activity after being treated by certain technology, is condensed and hardened under the action of an exciting agent, and can also be used as a base material doped with aluminum sulfate waste residue.
Therefore, the development of an inorganic cementing material which can be doped with a large amount of aluminum sulfate waste residues and has a certain engineering application value has important significance for environmental protection, energy conservation and emission reduction.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the inorganic cementing material containing the aluminum sulfate waste residue and the preparation method thereof.
In order to achieve the purpose, the invention adopts the technical scheme that: an inorganic cementing material containing aluminum sulfate waste residue comprises aluminum sulfate waste residue, active aluminosilicate and an exciting agent; the mass ratio of the aluminum sulfate waste residue to the active aluminosilicate is 1-7; the active aluminosilicate comprises at least one of metakaolin, calcined and activated coal gangue and calcined and activated red mud.
The inorganic cementing material is added with the aluminum sulfate waste residue, so that an environment-friendly way is provided for the disposal of the aluminum sulfate waste residue at present; metakaolin produced with low energy consumption, coal gangue easily causing environmental pollution and red mud are activated to be used as reaction powder and mixed with aluminum sulfate waste residues, so that industrial waste residues are fully utilized, and the environmental pollution is reduced.
The inventors have further found that by using the above-mentioned aluminum sulfate waste residue and active aluminosilicate in a specific mass ratio, the compressive strength and tensile strength of the inorganic cementitious material containing aluminum sulfate waste residue can be effectively controlled, and the utilization rate of the aluminum sulfate waste residue can be maximized; if the mass ratio of the aluminum sulfate waste residue to the active aluminosilicate is too large (the mass ratio of the aluminum sulfate waste residue to the active aluminosilicate is more than 7: 3), the inorganic cementing material is caused to generate a whiskering phenomenon, and the strength is less than 10MPa, and if the mass ratio of the aluminum sulfate waste residue to the active aluminosilicate is too small (the mass ratio of the aluminum sulfate waste residue to the active aluminosilicate is less than 1: 9), the utilization rate of the aluminum sulfate waste residue is low, and the effect of reasonably utilizing the aluminum sulfate waste residue cannot be achieved.
Preferably, the activator is water glass.
The water glass used in the present invention is sodium water glass or potassium water glass which is commonly commercially available, and the modulus of the commonly commercially available water glass is 1.0 to 3.3M.
More preferably, the modulus of the water glass is 1.0-2.0M, and the inventor finds through experiments that when the modulus of the water glass is more than 2.0M, the proportion of the colloid component is larger, the viscosity of the water glass is increased, the solubility of the water glass is reduced, the hardening time is prolonged, and the preparation of the inorganic cementing material is not facilitated; when the modulus of the water glass is less than 1.0M, the strength of the inorganic cement is significantly reduced.
More preferably, the concentration of the water glass is 30-70%, and the inventor finds out through experiments that the alkali efflorescence phenomenon of the inorganic cementing material can be effectively controlled when the concentration of the water glass is in the range.
The invention also aims to provide a preparation method of the inorganic cementing material containing the aluminum sulfate waste residue, which comprises the following steps:
s1, carrying out filter pressing, crushing, drying and crushing on aluminum sulfate waste residues to obtain aluminum sulfate waste residue dry powder;
s2, calcining at least one of metakaolin, calcined and activated coal gangue and calcined and activated red mud, cooling, crushing, grinding and sieving activated materials to obtain active aluminosilicate powder;
s3, mixing the aluminum sulfate waste residue dry powder in the step S1 with the active aluminosilicate powder in the step S2;
and S4, doping an exciting agent into the mixed powder in the step S3, stirring and uniformly mixing at room temperature, and hardening the slurry to obtain the inorganic cementing material containing the aluminum sulfate waste residues.
It should be noted that, in step S3 of the present invention, the aluminum sulfate waste residue obtained in step S1 may be doped with an activator, and then, the corresponding step S4 is: and (3) mixing the active aluminosilicate powder obtained in the step (S2) with the active aluminosilicate powder obtained in the step (S3).
Preferably, in the step S1, the drying method of the aluminum sulfate waste residue is a drying method or drying in the sun.
Preferably, in step S1, the aluminum sulfate waste residue is crushed by ball milling, mechanical crushing or manual grinding.
In addition, the waste aluminum sulfate slag is not required to be dried, and the waste aluminum sulfate slag which is not dried has moisture with the mass percentage of about 50 percent.
Preferably, in the step S2, the calcination temperature is 600-800 ℃, and the active aluminosilicate of the present invention is obtained by calcination at this low temperature, so that the energy consumption for production is low, and no pollution is caused to the environment.
Preferably, in the step S2, the calcination time is 2-4h.
The invention also provides application of the inorganic cementing material containing the aluminum sulfate waste residue in preparation of building materials.
The invention has the beneficial effects that: the invention provides an inorganic cementing material containing aluminum sulfate waste residue, which takes aluminum sulfate waste residue and active aluminosilicate as raw materials, provides an environment-friendly approach for the disposal of industrial waste residue, and does not cause pollution to the environment; by adopting the aluminum sulfate waste residue and the active aluminosilicate with a specific mass ratio, a hardened body with certain compressive strength and tensile strength can be prepared, and the aluminum sulfate waste residue is effectively utilized; the whiskering phenomenon of the cementing material is effectively controlled by adding the excitant with specific modulus and concentration; from the perspective of energy conservation and emission reduction, the invention can realize that the raw materials for preparing the material are all solid wastes, thereby greatly reducing the environmental pollution; the inorganic cementing material prepared by the invention can replace the traditional portland cement, and has good application prospect in the aspects of industrial waste residue recycling and building material preparation.
Drawings
FIG. 1 is a flow chart of the preparation of the inorganic cementitious material containing aluminum sulfate waste residue of the present invention.
FIG. 2 is an SEM photograph of the inorganic cement containing an aluminum sulfate slag in example 1.
FIG. 3 is an SEM photograph of an inorganic cement in comparative example 7.
Detailed Description
To better illustrate the objects, aspects and advantages of the present invention, the present invention will be further described with reference to the following examples.
Example 1
In an embodiment of the inorganic gel material containing aluminum sulfate waste residues of the present invention, the preparation method of the inorganic gel material containing aluminum sulfate waste residues of the present embodiment includes:
s1, spreading the aluminum sulfate waste residue after filter pressing and crushing outside the room for solarization to be dry, and carrying out ball milling on the dried aluminum sulfate waste residue to obtain aluminum sulfate waste residue dry powder;
s2, calcining 800-mesh kaolin at 700 ℃ for 2h, and crushing, grinding and sieving the active metakaolin after the active metakaolin is cooled to obtain active aluminosilicate powder;
s3, mixing the dried aluminum sulfate waste residue powder in the step S1 with the active aluminosilicate powder in the step S2 according to the mass ratio of 1;
and S4, adding water glass with the modulus of 1.2M and the concentration of 35% into the mixed powder in the step S3, stirring and mixing the mixture uniformly at room temperature, and hardening the slurry to obtain the inorganic cementing material containing the aluminum sulfate waste residue, wherein FIG. 2 is an SEM image of the inorganic cementing material containing the aluminum sulfate waste residue in the embodiment.
Example 2
This example differs from example 1 only in that: in the step S1, the crushed aluminum sulfate waste residue is not dried and ground; step S4, the aluminum sulfate waste residue dry powder obtained in the step S1 is doped into water glass with the modulus of 1.2M and the concentration of 30 percent and is stirred and mixed uniformly; and S5, doping the active aluminosilicate powder obtained in the step S2 into the mixed slurry obtained in the step S4, and uniformly stirring and mixing to obtain the inorganic gel material containing the aluminum sulfate waste residues.
Example 3
This example differs from example 1 only in that: in the step S1, carrying out filter pressing and crushing on the aluminum sulfate waste residue, and then drying in a dryer; in the step S2, the coal gangue powder is calcined for 2 hours at 700 ℃, and after the coal gangue powder is cooled, the coal gangue powder is crushed, ground and sieved to obtain active aluminosilicate powder; in the step S3, the mass ratio of the aluminum sulfate waste residue dry powder to the active aluminosilicate powder is 1.
Example 4
This example only differs from example 1 in that: in the step S2, the red mud tailings are calcined for 2 hours at 700 ℃, and after the coal gangue powder is cooled, the coal gangue powder is crushed, ground and sieved to obtain the active aluminosilicate powder.
Example 5
This example only differs from example 1 in that: in the step S3, the mass ratio of the aluminum sulfate waste residue dry powder to the active aluminosilicate powder is 1.
Example 6
This example differs from example 1 only in that: in the step S3, the mass ratio of the aluminum sulfate waste residue dry powder to the active aluminosilicate powder is 7.
Example 7
This example only differs from example 1 in that: in the step S3, the mass ratio of the aluminum sulfate waste residue dry powder to the active aluminosilicate powder is 7.
Example 8
This example differs from example 1 only in that: the modulus of the water glass is 1.0M.
Example 9
This example differs from example 1 only in that: the modulus of the water glass is 2.0M.
Example 10
This example differs from example 1 only in that: the concentration of the water glass is 70%.
Comparative example 1
This comparative example differs from example 1 only in that: in the step S3, the mass ratio of the aluminum sulfate waste residue dry powder to the active aluminosilicate powder is more than 7.
Comparative example 2
This comparative example differs from example 1 only in that: in the step S3, the mass ratio of the aluminum sulfate waste residue dry powder to the active aluminosilicate powder is less than 1.
Comparative example 3
This comparative example differs from example 1 only in that: the concentration of the water glass is more than 70 percent.
Comparative example 4
The comparative example only differs from example 1 in that: the concentration of the water glass is less than 30 percent.
Comparative example 5
This comparative example differs from example 1 only in that: the modulus of the water glass is less than 1.0M.
Comparative example 6
This comparative example differs from example 1 only in that: the modulus of the water glass is more than 2.0M.
Comparative example 7
This comparative example differs from example 1 only in that: aluminum sulfate waste residue was not added to the inorganic cementitious material, and fig. 3 is an SEM image of the inorganic cementitious material according to this comparative example.
Examples of effects
The inorganic cementitious materials containing aluminum sulfate slag described in examples 1 to 10 and comparative examples 1 to 6 were poured into a test mold of 40mm × 40mm × 160mm, and then maintained outdoors for 7, 14, and 28 days after mold removal, and the compression strength and the flexural strength of the hardened body after hardening were measured, and the results are shown in table 1 below;
in Table 1, "-" indicates that the set time of the cured product was too long, and therefore the compressive strength or the flexural strength could not be measured in a correspondingly short time.
TABLE 1
The results in table 1 show that the mass ratio of the aluminum sulfate waste residue dry powder to the active aluminosilicate powder in the hardened bodies in comparative example 1 and comparative example 2 deviates from the range provided by the present invention, the compression strength and the flexural strength of the hardened body in comparative example 1 for 28 days are only 7.2MPa and 0.7MPa, and the mass ratio of the aluminum sulfate waste residue is extremely low and does not achieve the purpose of fully utilizing the aluminum sulfate waste residue although the effects of the compression strength and the flexural strength are superior to those of the examples in comparative example 2; in comparative example 3, the concentration of water glass was high, and although a hardened body having strength could be produced, the viscosity of the slurry was too high and the setting time was too long, resulting in a limited workability of the slurry in actual work; in comparative example 4, the concentration of water glass is low, the water content of water glass is high, and the hardened body can generate the phenomenon of saltpetering, and in comparative example 6, the setting time of the slurry is too long due to the high modulus of the water glass.
The results in Table 1 show that the hardened bodies in the examples have high compressive strength and flexural strength after 28 days of outdoor curing, and can be used for the preparation of building materials.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (7)
1. An inorganic gelled material containing aluminum sulfate waste residue is characterized by comprising aluminum sulfate waste residue, active aluminosilicate and an exciting agent; the mass ratio of the aluminum sulfate waste residue to the active aluminosilicate is 1-7; the active aluminosilicate comprises at least one of metakaolin, calcined and activated coal gangue and calcined and activated red mud; wherein the excitant is water glass, the modulus of the water glass is 1.0-2.0M, and the concentration is 30-70%.
2. The method for preparing the inorganic cementitious material containing aluminum sulfate waste residue as claimed in claim 1, characterized by comprising the following steps:
s1, carrying out filter pressing, crushing, drying and crushing on aluminum sulfate waste residues to obtain aluminum sulfate waste residue dry powder;
s2, calcining at least one of metakaolin, calcined and activated coal gangue and calcined and activated red mud, and crushing, grinding and sieving the activated material body after cooling to obtain active aluminosilicate powder;
s3, mixing the aluminum sulfate waste residue dry powder in the step S1 with the active aluminosilicate powder in the step S2;
and S4, doping an exciting agent into the mixed powder in the step S3, stirring and uniformly mixing at room temperature, and hardening the slurry to obtain the inorganic cementing material containing the aluminum sulfate waste residues.
3. The method for preparing the inorganic cementitious material containing aluminum sulfate waste residue as claimed in claim 2, wherein in the step S1, the drying method of the aluminum sulfate waste residue is drying method or drying in the sun.
4. The method for preparing the inorganic cementitious material containing aluminum sulfate waste residue as claimed in claim 2, wherein in the step S1, the crushing mode of the aluminum sulfate waste residue is ball milling, electric grinding crushing or manual grinding.
5. The method for preparing an inorganic cementitious material containing aluminum sulfate waste residue as claimed in claim 2, wherein in the step S2, the calcination temperature is 600-800 ℃.
6. The method for preparing an inorganic cementitious material containing aluminum sulfate waste residue as claimed in claim 2, wherein in the step S2, the calcination time is 2-4h.
7. The use of the inorganic cementitious material containing aluminium sulphate waste residues or the method for preparing the inorganic cementitious material containing aluminium sulphate waste residues as claimed in any one of claims 1 to 6 in the preparation of building materials.
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Effective date of registration: 20231211 Address after: 417700 No. 588 Cai Hesen Avenue West, Jinkai Street, Shuangfeng County, Loudi City, Hunan Province Patentee after: Hunan Guiye Technology Co.,Ltd. Address before: 421099 Huaxing Avenue Rongguanliancheng, Zhengxiang District, Hengyang City, Hunan Province Patentee before: Dong Teng |