CN114573318A - Special mixture for aerated concrete and preparation method thereof - Google Patents

Special mixture for aerated concrete and preparation method thereof Download PDF

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Publication number
CN114573318A
CN114573318A CN202210264709.7A CN202210264709A CN114573318A CN 114573318 A CN114573318 A CN 114573318A CN 202210264709 A CN202210264709 A CN 202210264709A CN 114573318 A CN114573318 A CN 114573318A
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aerated concrete
mixture
special
preparation
raw material
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CN114573318B (en
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许毅刚
侯莉
陈雪梅
钟文
李军
卢忠远
罗凯
喻庆华
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Jiahua Special Cement Co ltd
Southwest University of Science and Technology
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Jiahua Special Cement Co ltd
Southwest University of Science and Technology
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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
    • C04B40/0046—Premixtures of ingredients characterised by their processing, e.g. sequence of mixing the ingredients when preparing the premixtures
    • 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
    • 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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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

The invention discloses a special mixture for aerated concrete and a preparation method thereof, belongs to the technical field of cementing materials, and solves the problems of large material fluctuation, unstable quality, high energy consumption and CO (carbon monoxide) in the prior art of aerated concrete2High discharge and large environmental impact. The preparation method comprises the following steps: preparing a mixture raw material, wherein the raw material comprises 30-40% of carbide slag, 56-68% of siliceous coal gangue and 2-4% of industrial byproduct gypsum; calcining the mixed raw material to obtain mixed clinker; and (3) adding a dispersing agent into the clinker, and mixing and grinding to obtain the special mixture for the aerated concrete. The invention also discloses the special aerated concrete mixture prepared by the method. The method of the invention solves the simultaneous supply of calcium, siliceous material and sulfur material required by the preparation of the aerated concrete by one step, and simplifies the original aerated concreteThe material preparation process reduces the difficulty of raw material preparation control. The raw materials used in the invention are all bulk solid wastes, and the invention is energy-saving and environment-friendly.

Description

Special mixture for aerated concrete and preparation method thereof
Technical Field
The invention belongs to the technical field of cementing materials, and particularly relates to a special mixture for aerated concrete and a preparation method thereof.
Background
The aerated concrete is a novel building material which integrates the advantages of light weight, heat preservation, fire prevention, sound absorption, environmental protection and the like. In the conventional aerated concrete production, raw materials such as lime, cement, gypsum, siliceous materials and the like need to be purchased respectively, the siliceous materials in the purchased raw materials need to be ground and put in a warehouse respectively, and then are mixed with calcareous materials such as the lime, the cement, the gypsum and the like and mixing water to prepare slurry, so that the difficulty of material mixing control is high, and the process is complex. In particular, the quality of the purchased lime, gypsum, siliceous materials and the like greatly fluctuates, which causes the large fluctuation of the performance and the quality of the aerated concrete product. In addition, in the aerated concrete raw materials, high-temperature calcination and a large amount of limestone are needed for producing cement and lime, the energy consumption is high, and CO is high2High discharge and large environmental impact.
In view of the above, it isThe special mixture for the aerated concrete and the preparation method thereof are designed, and the special mixture simultaneously contains lime (CaO), gypsum and siliceous materials with proper compositions, so that the quality fluctuation of raw materials is reduced, and the difficulty of a batching process is reduced; meanwhile, the raw materials for preparing the special mixture use calcium, silicon and sulfur solid wastes with low carbonate content, so that the consumption of natural mineral resources, energy consumption and CO prepared from the special mixture are reduced2Discharge, and the like, and the green and low-carbon content of the product is improved.
Disclosure of Invention
One of the purposes of the invention is to provide a preparation method of a special mixture for aerated concrete, which solves the problems of large material fluctuation, unstable quality, high energy consumption and CO in the prior art of aerated concrete2High discharge and large environmental impact.
The invention also aims to provide the special mixture for the aerated concrete prepared by the preparation method.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the invention provides a preparation method of a special mixture for aerated concrete, which comprises the following steps:
s1, preparing a mixture raw material, wherein the raw material comprises 30-40% of carbide slag, 56-68% of siliceous coal gangue and 2-4% of industrial byproduct gypsum in percentage by mass;
s2, calcining the clinker, namely calcining the mixed raw material to obtain mixed clinker;
s3, preparing a mixture, namely adding a dispersing agent into the clinker obtained in the step S2, mixing and grinding the mixture into powder with the screen residue of less than 20 percent of a 80-micron square-hole sieve, and preparing the special mixture for aerated concrete.
In some embodiments of the invention, the raw materials are pre-crushed to a particle size of < 15mm prior to formulating the raw mix.
In some embodiments of the invention, Ca (OH) in the carbide slag2The content is more than 85wt percent, and the attached water content is less than 3wt percent.
In some embodiments of the invention, the SiO in the siliceous coal gangue is2The content is more than 60 wt%，Al2O3The content is less than 20 wt%, and the content of the compound water is less than 10 wt%.
In some embodiments of the present invention, the industrial byproduct gypsum comprises at least one of desulfurized gypsum, phosphogypsum, titanium gypsum and mirabilite gypsum, and CaSO in the industrial byproduct gypsum4.2H2The O content is more than 85wt percent, and the attached water content is less than 5wt percent.
In some embodiments of the invention, the dispersant comprises at least one of triethanolamine, triisopropanolamine, and ethylene glycol monoisopropanolamine.
In some embodiments of the present invention, the calcination in S2 is performed at 550-650 ℃ for 20-60 min; preferably, calcination is carried out for 30 min.
In some embodiments of the invention, the dispersant is used in an amount of 0.01 to 0.1%, preferably 0.05% by mass of the clinker.
The special aerated concrete mixture prepared by the preparation method of the special aerated concrete mixture provided by the invention.
In some embodiments of the invention, the special mixture for aerated concrete comprises 25-35 wt% of CaO and 45-55 wt% of SiO2And 1.5 to 2.5 wt% of SO3。
The calcareous materials (lime and CaO) in the special mixture for aerated concrete are obtained by calcining carbide slag. The chemical components in the carbide slag are Ca (OH)2Mainly, CaO is generated by the loss of water during calcination. The method is different from the traditional method that lime is prepared by calcining limestone, and the carbide slag has low calcining and dehydrating temperature and does not discharge CO2The activity of the generated CaO is higher, and the demand and the requirement of calcareous materials of the aerated concrete can be fully ensured.
The siliceous material (SiO) in the special mixture for aerated concrete2) Is derived from the calcination of siliceous coal gangue. SiO in siliceous coal gangue2Existing in quartz and clay mineral, and releasing amorphous SiO with higher activity after dehydrating and decomposing the clay mineral in the process of calcining siliceous coal gangue2The reaction activity of the siliceous material and the calcareous material is improved, and the quality of the aerated concrete is improved.
In the prior art, gypsum is required to be added in the preparation process of aerated concrete to adjust the lime digestion speed, the slurry consistency and the setting time, and meanwhile, the gypsum can promote siliceous and calcareous materials to generate more tobermorite and other beneficial minerals under the hydrothermal condition. However, with CaSO4.2H2The industrial byproduct gypsum mainly containing O contains more soluble phosphorus and fluorine compounds, and the performance of the aerated concrete slurry and the product performance can be reduced. The preparation method of the invention uses the industrial by-product gypsum as the raw material, and the CaSO is calcined4.2H2Conversion of O to stable, active anhydrous CaSO4Meanwhile, the phosphorus and the fluorine compounds are volatilized and removed in the calcining process, so that the influence of impurities on the quality of the aerated concrete is avoided.
When the special mixture for aerated concrete is used for preparing aerated concrete, the special mixture is directly mixed with water and aluminum powder paste for producing aerated concrete of various grades.
Compared with the prior art, the invention has the following beneficial effects:
the special mixture for the aerated concrete prepared by the method does not need to be independently mixed with lime, cement, fly ash, quartz sand, gypsum and other materials, can be directly mixed with water and aluminum powder paste for producing aerated concrete of various grades, and overcomes the problems of raw material quality control, complex batching process and unstable product quality in the production process of the aerated concrete.
The preparation method synchronously realizes the dehydration of the carbide slag to generate active CaO and the dehydration of the siliceous coal gangue to generate active SiO in the calcining process2And the industrial byproduct gypsum is dehydrated to generate active anhydrous gypsum and harmful impurities are removed, so that the simultaneous supply of calcium, siliceous and sulfur materials required by the preparation of the aerated concrete is solved, the preparation process of the raw materials of the aerated concrete is simplified, and the difficulty in the preparation and control of the raw materials is reduced.
The raw materials of the carbide slag, the siliceous coal gangue and the industrial byproduct gypsum are all bulk solid wastes, and the aerated concrete does not need to be doped with other natural ore resources, thereby fully embodying the concept of energy conservation and environmental protection.
Detailed Description
Hereinafter, a mixture specially used for aerated concrete and a method for preparing the same according to the present invention will be described in detail by way of examples.
A preparation method of a special mixture for aerated concrete comprises the following steps:
s1, preparing a mixture raw material, wherein the raw material comprises 30-40% of carbide slag, 56-68% of siliceous coal gangue and 2-4% of industrial byproduct gypsum in percentage by mass;
s2, calcining the clinker, namely calcining the mixed raw material to obtain mixed clinker;
s3, preparing a mixture, namely adding a dispersing agent into the clinker obtained in the step S2, mixing and grinding the mixture into powder with the screen residue of less than 20 percent of a 80-micron square-hole sieve, and preparing the special mixture for aerated concrete.
Before preparing the raw materials of the mixture, the raw materials are pre-crushed until the particle size of the particles is less than 15 mm.
Ca (OH) in the carbide slag2The content is more than 85wt percent, and the attached water content is less than 3wt percent.
SiO in the siliceous coal gangue2Content > 60 wt.%, Al2O3The content is less than 20 wt%, and the content of the compound water is less than 10 wt%.
The industrial by-product gypsum comprises at least one of desulfurized gypsum, phosphogypsum, titanium gypsum and mirabilite gypsum, and CaSO in the industrial by-product gypsum4.2H2The O content is more than 85wt percent, and the attached water content is less than 5wt percent.
The dispersing agent comprises at least one of triethanolamine, triisopropanolamine and ethylene glycol monoisopropanolamine.
Calcining at the temperature of 550-650 ℃ for 20-60min in the S2; preferably, calcination is carried out for 30 min.
The dosage of the dispersant is 0.01-0.1% of the mass of the clinker, and the preferred dosage is 0.05%.
The special aerated concrete mixture is prepared by the preparation method.
The special mixture for aerated concrete comprises 25-35 wt% of CaO and 45-55 wt% of SiO2And 1.5 to 2.5 wt% of SO3。
When the special mixture for aerated concrete is used for preparing aerated concrete, the special mixture is directly mixed with water and aluminum powder paste for producing aerated concrete of various grades.
Ca (OH) used in examples of the present invention2The content is more than 85wt percent, and the attached water content is less than 3wt percent.
SiO in siliceous coal gangue used in the embodiment of the invention2Content > 60 wt%, Al2O3The content is less than 20 wt%, and the content of the compound water is less than 10 wt%.
CaSO in industrial by-product gypsum used in the embodiment of the invention4.2H2O content is more than 85 wt%, and attached water content is less than 5 wt%.
Example 1
The embodiment discloses a preparation method of a special mixture for aerated concrete, which specifically comprises the following steps:
1) respectively pre-crushing the carbide slag, the siliceous coal gangue and the industrial byproduct gypsum phosphogypsum until the particle size is less than 15 mm;
2) preparing a mixed raw material, wherein the mixed raw material comprises 30 wt% of carbide slag, 67 wt% of siliceous coal gangue and 3 wt% of industrial byproduct gypsum;
3) calcining the clinker, namely calcining the mixed raw material in an electric heating furnace at 650 ℃ for 30 minutes to obtain mixed clinker;
4) the mixture is prepared, dispersant triethanolamine accounting for 0.05 percent of the mass of the clinker is mixed into the clinker, and the mixture is ground into powder with the screen residue of a square-hole sieve of 80 microns less than 20 percent, so that the special mixture for aerated concrete is prepared.
Example 2
1) Respectively pre-crushing the carbide slag, the siliceous coal gangue and the industrial byproduct gypsum desulfurized gypsum until the particle size is less than 15 mm;
2) preparing a mixed material raw material, wherein the raw material comprises 35 wt% of carbide slag, 62 wt% of siliceous coal gangue and 3 wt% of industrial byproduct gypsum;
3) calcining the clinker, namely calcining the mixed material raw material in an electric heating furnace at 600 ℃ for 30 minutes to obtain mixed material clinker;
4) the mixture is prepared, the clinker is mixed with triisopropanolamine which is a dispersant accounting for 0.05 percent of the mass of the clinker, and the mixture is ground into powder with 80-micron square-hole sieve residue of less than 20 percent, so that the special mixture for aerated concrete is prepared.
Example 3
1) Respectively pre-crushing the carbide slag, the siliceous coal gangue and the industrial byproduct gypsum mirabilite gypsum until the particle size is less than 15 mm;
2) preparing a mixed raw material, wherein the raw material comprises 40 wt% of carbide slag, 57 wt% of siliceous coal gangue and 3 wt% of industrial byproduct gypsum;
3) calcining the clinker, namely calcining the mixed raw material in an electric heating furnace at 550 ℃ for 30 minutes to obtain mixed clinker;
4) the clinker is mixed with a dispersant of ethylene glycol monoisopropanolamine accounting for 0.05 percent of the mass of the clinker, and the mixture is mixed and ground into powder with the screen residue of less than 20 percent of a 80-micron square-hole sieve, so that the special mixture for aerated concrete is prepared.
Example 4
1) Respectively pre-crushing the carbide slag, the siliceous coal gangue and the industrial byproduct gypsum titanium gypsum until the particle size is less than 15 mm;
2) preparing a mixed material raw material, wherein the raw material comprises 30 wt% of carbide slag, 68 wt% of siliceous coal gangue and 2 wt% of industrial byproduct gypsum;
3) calcining the clinker, namely calcining the mixed raw material in an electric heating furnace at 650 ℃ for 30 minutes to obtain mixed clinker;
4) the mixture is prepared, dispersant triethanolamine accounting for 0.05 percent of the mass of the clinker is mixed into the clinker, and the mixture is ground into powder with the screen residue of a square-hole sieve of 80 microns less than 20 percent, so that the special mixture for aerated concrete is prepared.
Example 5
1) Respectively pre-crushing the carbide slag, the siliceous coal gangue and the industrial byproduct gypsum phosphogypsum until the particle size is less than 15 mm;
2) preparing a mixed raw material, wherein the mixed raw material comprises 35 wt% of carbide slag, 63 wt% of siliceous coal gangue and 2 wt% of industrial byproduct gypsum;
3) calcining the clinker, namely calcining the mixed material raw material in an electric heating furnace at 600 ℃ for 30 minutes to obtain mixed material clinker;
4) the mixture is prepared, dispersant triethanolamine accounting for 0.05 percent of the mass of the clinker is mixed into the clinker, and the mixture is ground into powder with the screen residue of a square-hole sieve of 80 microns less than 20 percent, so that the special mixture for aerated concrete is prepared.
Example 6
1) Respectively pre-crushing the carbide slag, the siliceous coal gangue and the industrial byproduct gypsum phosphogypsum until the particle size is less than 15 mm;
2) preparing a mixed material raw material, wherein the raw material comprises 40 wt% of carbide slag, 58 wt% of siliceous coal gangue and 2 wt% of industrial byproduct gypsum;
3) calcining the clinker, namely calcining the mixed raw material in an electric heating furnace at 550 ℃ for 30 minutes to obtain mixed clinker;
4) the clinker is mixed with a dispersant of ethylene glycol monoisopropanolamine accounting for 0.05 percent of the mass of the clinker, and the mixture is mixed and ground into powder with the screen residue of less than 20 percent of a 80-micron square-hole sieve, so that the special mixture for aerated concrete is prepared.
Example 7
1) Respectively pre-crushing the carbide slag, the siliceous coal gangue and the industrial byproduct gypsum phosphogypsum until the particle size is less than 15 mm;
2) preparing a mixed material raw material, wherein the raw material comprises 30 wt% of carbide slag, 66 wt% of siliceous coal gangue and 4 wt% of industrial byproduct gypsum;
3) calcining the clinker, namely calcining the mixed raw material in an electric heating furnace at 650 ℃ for 30 minutes to obtain mixed clinker;
4) the mixture is prepared, the clinker is mixed with triisopropanolamine which is a dispersant accounting for 0.05 percent of the mass of the clinker, and the mixture is ground into powder with 80-micron square-hole sieve residue of less than 20 percent, so that the special mixture for aerated concrete is prepared.
Example 8
1) Respectively pre-crushing the carbide slag, the siliceous coal gangue and the industrial byproduct gypsum desulfurized gypsum until the particle size is less than 15 mm;
2) preparing a mixed raw material, wherein the mixed raw material comprises 35 wt% of carbide slag, 61 wt% of siliceous coal gangue and 4 wt% of industrial byproduct gypsum;
3) calcining the clinker, namely calcining the mixed material raw material in an electric heating furnace at 600 ℃ for 30 minutes to obtain mixed material clinker;
4) the mixture is prepared, dispersant accounting for 0.05 percent of the mass of the clinker is mixed into the clinker, and the mixture is ground into powder with the screen residue of a square-hole sieve of 80 microns less than 20 percent, so as to prepare the special mixture for aerated concrete.
Example 9
1) Respectively pre-crushing the carbide slag, the siliceous coal gangue and the industrial byproduct gypsum titanium gypsum until the particle size is less than 15 mm;
2) preparing a mixed material raw material, wherein the raw material comprises 40 wt% of carbide slag, 56 wt% of siliceous coal gangue and 4 wt% of industrial byproduct gypsum;
3) calcining the clinker, namely calcining the mixed raw material in an electric heating furnace at 550 ℃ for 30 minutes to obtain mixed clinker;
4) the clinker is mixed with triethanolamine which is a dispersant accounting for 0.05 percent of the mass of the clinker, and the mixture is ground into powder with 80-micron square-hole sieve residue less than 20 percent, so as to prepare the special mixture for aerated concrete.
Comparative example 1
In this comparative example, the calcination temperature was 540 ℃ as compared with example 1, and the remaining conditions were the same.
Comparative example 2
In this comparative example, the calcination temperature was 680 ℃ as compared with example 1, and the remaining conditions were the same.
The components of the special mixture for aerated concrete prepared in examples 1 to 9 and comparative examples 1 to 2 were measured, and the results are shown in the following table:
table 1 shows the composition of the raw batch and the calcination temperature of the mixed materials of examples 1 to 9 and comparative examples 1 to 2.
TABLE 1
Figure BDA0003552188730000071
From the data, the special mixture for aerated concrete prepared by the embodiment of the invention contains calcareous, siliceous and gypsum components required by aerated concrete preparation, and CaO/SiO is obtained by calculation2The molar ratio is between 0.5 and 0.83, which meets the requirement of the aerated concrete on CaO/SiO in the ingredients2The molar ratio is required. The prepared special mixture for the aerated concrete can be directly mixed with water and aluminum powder paste for producing various grades of aerated concrete without adding materials such as lime, cement, fly ash, quartz sand, gypsum and the like.
Compared with the prior art, the calcining temperature is too low, the crystal water content in carbide slag, gypsum and coal gangue is higher, the content of limited components such as silicon, aluminum, sulfur and the like is reduced, and the system activity is lower; comparative example 2 calcination temperature too high, anhydrous CaSO4Over-burning (reduced solubility) does not play a role in adjusting consistency and setting time.
Although the present invention has been described above in connection with exemplary embodiments, it will be apparent to those skilled in the art that various modifications and changes may be made to the exemplary embodiments of the present invention without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (10)

1. The preparation method of the special mixture for the aerated concrete is characterized by comprising the following steps of:
s1, preparing a mixture raw material, wherein the raw material comprises 30-40% of carbide slag, 56-68% of siliceous coal gangue and 2-4% of industrial byproduct gypsum in percentage by mass;
s2, calcining the clinker, namely calcining the mixed raw material to obtain mixed clinker;
s3, preparing a mixture, namely adding a dispersing agent into the clinker obtained in the step S2, mixing and grinding the mixture into powder with the screen residue of less than 20 percent of a 80-micron square-hole sieve, and preparing the special mixture for aerated concrete.
2. The method for preparing a special mixture for aerated concrete according to claim 1, wherein, before preparing the raw material of the mixture, the raw materials are pre-crushed to have a particle size of less than 15 mm.
3. The preparation method of the special mixture for aerated concrete according to claim 1, wherein Ca (OH) in the carbide slag2The content is more than 85wt percent, and the attached water content is less than 3wt percent.
4. The preparation method of the special mixture for aerated concrete according to claim 1, wherein SiO in the siliceous coal gangue is2Content > 60 wt%, Al2O3The content is less than 20 wt%, and the content of the compound water is less than 10 wt%.
5. The method for preparing the special mixture for aerated concrete according to claim 1, wherein the industrial by-product gypsum comprises at least one of desulfurized gypsum, phosphogypsum, titanium gypsum and mirabilite gypsum, and CaSO in the industrial by-product gypsum4.2H2The O content is more than 85wt percent, and the attached water content is less than 5wt percent.
6. The method for preparing the special mixture for aerated concrete according to claim 1, wherein the dispersant comprises at least one of triethanolamine, triisopropanolamine and ethylene glycol monoisopropanolamine.
7. The method for preparing a special mixture for aerated concrete according to any one of claims 1 to 6, wherein in S2, the mixture is calcined at 550-650 ℃ for 20-60 min; preferably, calcination is carried out for 30 min.
8. The preparation method of the special mixture for aerated concrete according to claim 7, wherein the amount of the dispersant is 0.01-0.1%, preferably 0.05% of the mass of the clinker.
9. The special aerated concrete mixture prepared by the preparation method of the special aerated concrete mixture according to any one of claims 1 to 8.
10. The special mixture for aerated concrete according to claim 9, wherein the special mixture for aerated concrete comprises 25-35 wt% of CaO and 45-55 wt% of SiO2And 1.5 to 2.5 wt% of SO3。
CN202210264709.7A 2022-03-17 2022-03-17 Special mixture for aerated concrete and preparation method thereof Active CN114573318B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114988733A (en) * 2022-06-28 2022-09-02 嘉华特种水泥股份有限公司 Grinding method of low-carbon cementing material for aerated concrete

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104058619A (en) * 2014-06-26 2014-09-24 尹小林 Method for producing construction materials and generating power by roasting waste gypsum and coal gangue
CN104876627A (en) * 2014-09-22 2015-09-02 河北工程大学 Method for preparing aerated concrete from gangue and iron tailings

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104058619A (en) * 2014-06-26 2014-09-24 尹小林 Method for producing construction materials and generating power by roasting waste gypsum and coal gangue
CN104876627A (en) * 2014-09-22 2015-09-02 河北工程大学 Method for preparing aerated concrete from gangue and iron tailings

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114988733A (en) * 2022-06-28 2022-09-02 嘉华特种水泥股份有限公司 Grinding method of low-carbon cementing material for aerated concrete

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