Sintered aeolian sand pottery sand and preparation method thereof

Abstract

The application provides sintered aeolian sand ceramic sand and a preparation method thereof. The sintered aeolian sand ceramic sand of the application uses aluminum slag as aluminum material and steel slag powder as a fluxing component to prepare sintered ceramic sand, and turns industrial waste into treasure. The application uses aeolian sand powder as silicon material to prepare sintered aeolian sand ceramic sand with a large amount of aeolian sand powder, which plays a positive role in the sustainable development of mineral resources and the resource utilization of aeolian sand. The sintered aeolian sand ceramic sand prepared by the application has a bulk density less than 1200kg / m 3 , a cylinder compressive strength more than 22MPa, a 1h water absorption less than 10%, and belongs to high-strength light aggregate. The product has excellent performance by reasonably controlling the formula ratio.

Description

Technical Field

[0001] This invention relates to the field of building materials technology, and in particular to a sintered aeolian ceramsite sand and its preparation method. Background Technology

[0002] Ceramic sand, a lightweight and porous ceramic granular material, is renowned for its low density, high compressive strength, and high porosity, and is primarily used in the construction industry and in thermal insulation and refractory materials. The production of ceramic sand mainly utilizes natural resources such as shale and clay as raw materials. However, because these raw materials are non-renewable resources, their large-scale extraction and use can lead to environmental damage, posing a significant threat to the sustainable production and development of ceramic sand. Therefore, finding alternative raw materials to reduce environmental impact is crucial for the future development of the ceramic sand industry.

[0003] Aeolian sand is formed from the disintegration of sandstone caused by intense desert sunlight, scarce rainfall, and high evaporation. Over long periods, wind polishes the sharp edges of these fragments, which are then carried by the wind over long distances and deposited. Aeolian sand particles are fine, typically ranging from 0.075 to 0.25 mm in diameter, easily leading to large-scale desertification and sand damage, severely hindering the socio-economic development of surrounding areas. Furthermore, the particle size distribution of aeolian sand exhibits discontinuous characteristics, with uniformly distributed particles. This gradation characteristic increases cement usage when used as fine aggregate, leading to reduced fluidity and strength in aeolian sand concrete.

[0004] The long-term accumulation of industrial waste occupies significant amounts of land resources, restricts other land uses, and leads to a decline in land quality, impacting agricultural production and the ecological environment. Secondly, harmful components in the waste, after being leached by rain and snow, may seep into the soil, causing soil acidification, alkalization, and hardening, and even heavy metal pollution. Simultaneously, industrial waste also pollutes water bodies. When toxic substances enter water bodies through the soil, they severely affect water quality, endanger the survival of aquatic life, and may enter human life through water sources, posing health risks.

[0005] Therefore, there is an urgent need to consume large amounts of aeolian sand and unusable industrial waste to reduce environmental pollution. Thus, a method for combining aeolian sand and industrial waste resources to produce ceramic sand is proposed. This is one of the effective ways to achieve large-scale utilization of aeolian sand and industrial waste, and it is of great significance for maximizing resource utilization, environmental protection, and the sustainable production and development of ceramic sand. However, currently there is no scheme for combining aeolian sand and industrial waste to prepare ceramic sand. Summary of the Invention

[0006] In view of this, the present invention provides a sintered aeolian sand ceramic sand and its preparation method. Its main purpose is to develop a sintered aeolian sand ceramic sand by using aeolian sand powder, aluminum waste residue, steel slag powder, water, etc., so as to realize the resource utilization, high value and diversified utilization of aeolian sand while disposing of industrial waste.

[0007] In a first aspect, the present invention provides a sintered aeolian sand ceramic sand, comprising the following components by weight: 50-80 parts aeolian sand powder, 10-40 parts aluminum waste slag, 10-20 parts steel slag powder, and 25-30 parts water.

[0008] Preferably, the particle size of the aeolian sand powder is ≤0.075mm.

[0009] Preferably, the aluminum waste residue includes at least one of coal gangue powder and fly ash.

[0010] Preferably, the steel slag powder comprises the following components by mass fraction: SiO2 14%-18%, Al2O3 7%-9%, Fe2O3 16%-20%, CaO 36%-40%, MgO 8%-10%, Na2O 1%-2%, K2O 1%-2%, MnO 3%-5%, TiO2 1%-2%, and unavoidable impurities content <0.1%.

[0011] Preferably, the particle size of the aluminum waste residue is ≤0.075mm;

[0012] And / or, the particle size of the steel slag powder is ≤0.075mm.

[0013] Secondly, the present invention also provides a method for preparing the aforementioned sintered aeolian ceramsite sand, comprising the following steps:

[0014] Aluminum waste residue, steel slag powder, and aeolian sand powder are mixed to obtain a mixture.

[0015] The mixture is added to a granulator, and water is added to granulate the material to obtain ceramic sand raw material balls.

[0016] Place the clay sand raw material balls in an indoor environment for natural curing;

[0017] Sintering the naturally cured clay raw material balls yields sintered aeolian clay.

[0018] Preferably, the sintering of naturally cured clay sand raw material balls specifically includes:

[0019] The raw clay pellets are added to a high-temperature furnace and preheated at 300-500℃ for 10-60 minutes. Then, the temperature is increased to 1050-1200℃ at a heating rate of 5-20℃ / min, and sintered for 1-60 minutes.

[0020] Preferably, the natural curing of ceramsite raw material balls in an indoor environment includes:

[0021] Place the ceramic sand raw material balls in an indoor environment and cure them for 1 to 3 days at a temperature of 20±3℃ and a relative humidity of 60±5%RH.

[0022] Preferably, the mixture is added to a granulator for granulation, and water is added in multiple batches for stirring and granulation to obtain ceramic sand raw material balls; during the granulation process, the granulator rotation speed is 60-120 r / min, the rotation angle is 30-60°, and the rotation time is 5-25 min; the particle size of the ceramic sand raw material balls is 1.18-4.75 mm.

[0023] Preferably, aluminum waste residue, steel slag powder, and aeolian sand powder are mixed and placed in a disperser and dispersed for 3-5 minutes to obtain a mixture.

[0024] The sintered aeolian ceramsite sand of the present invention has the following advantages over the prior art:

[0025] This invention relates to sintered aeolian sand ceramic sand, which utilizes aluminum waste slag as the aluminum material and steel slag powder as the fluxing agent to prepare sintered ceramic sand, turning polluting industrial waste into a valuable resource. This invention also utilizes aeolian sand powder as the siliceous material, and the large-scale incorporation of aeolian sand powder in the preparation of aeolian sand sintered ceramic sand plays a positive role in the sustainable development of mineral resources and the resource utilization of aeolian sand. Furthermore, this invention provides an aeolian sand sintered ceramic sand with a bulk density of less than 1200 kg / m³, prepared through the combination of various raw materials. 3 The compressive strength of the material can reach over 22MPa, and the water absorption rate is less than 10% in 1 hour. It belongs to high-strength lightweight aggregate. By reasonably controlling the formula ratio, the product has excellent performance. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0027] The following provides a detailed description of each example. It should be noted that the order of description of the embodiments below is not intended to limit the preferred order of the embodiments. Furthermore, in the description of this application, the term "comprising" means "including but not limited to". Various embodiments of the present invention may exist in the form of a range; it should be understood that the description in the form of a range is merely for convenience and brevity and should not be construed as a rigid limitation on the scope of the invention; therefore, it should be considered that the range description has specifically disclosed all possible sub-ranges and single numerical values ​​within that range. For example, it should be considered that the range description from 1 to 6 has specifically disclosed sub-ranges, such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., and single digits within the range, such as 1, 2, 3, 4, 5, and 6, regardless of the range. Additionally, whenever a numerical range is indicated herein, it means including any referenced number (fraction or integer) within the indicated range.

[0028] This invention provides a sintered aeolian sand ceramic sand, comprising the following components by weight: 50-80 parts aeolian sand powder, 10-40 parts aluminum waste slag, 10-20 parts steel slag powder, and 25-30 parts water.

[0029] In the aeolian sand sintered ceramic sand of the present invention, the aeolian sand powder is a siliceous material, the aluminum waste slag provides the aluminum material, and the steel slag powder is the fluxing component. At 573℃, α-type quartz in aeolian sand powder transforms into β-type quartz; at 870℃, it transforms into β-type phosphorite; and at 1100℃~1200℃, amorphous SiO2 transforms into β-type cristobalite. At 0~400℃, water vapor and CO2 escape from the spheres. At 400~500℃, MgCO3 decomposes into MgO and CO2; at 400~800℃, CaCO3 decomposes into CaO and CO2; at 900℃, sulfides decompose to produce S and SO2; and at 1000~1300℃, iron oxide decomposes to produce CO2 and CO. Simultaneously, under the influence of high temperature and steel slag powder, a liquid phase component appears in the aeolian sand powder. This liquid phase component acts as a binder for the solid phase component while encapsulating gases such as CO2 and CO. The increased gas pressure causes the spheres to expand. Furthermore, after Al2O3 is fired, a large amount of mullite phase is formed, endowing the ceramic sand with excellent mechanical properties.

[0030] In some embodiments, the aeolian sand powder is finely ground aeolian sand with a particle size ≤0.075mm.

[0031] In some embodiments, aluminum waste includes at least one of coal gangue powder and fly ash.

[0032] In some embodiments, the steel slag powder comprises the following components by mass fraction: SiO2 14%-18%, Al2O3 7%-9%, Fe2O3 16%-20%, CaO 36%-40%, MgO 8%-10%, Na2O 1%-2%, K2O 1%-2%, MnO 3%-5%, TiO2 1%-2%, and unavoidable impurities <0.1%.

[0033] In some embodiments, the particle size of aluminum waste is ≤0.075mm;

[0034] In some embodiments, the particle size of the steel slag powder is ≤0.075mm.

[0035] Based on the same inventive concept, this invention also provides a method for preparing sintered aeolian ceramsite sand, comprising the following steps:

[0036] S1. Mix aluminum waste residue, steel slag powder, and aeolian sand powder to obtain a mixture;

[0037] S2. Add the mixture to the granulator and add water to granulate and obtain ceramic sand raw material balls;

[0038] S3. Place the clay sand raw material balls in an indoor environment for natural curing;

[0039] S4. Sinter the naturally cured clay sand raw material balls to obtain sintered aeolian clay sand.

[0040] In some embodiments, sintering the naturally cured ceramic sand raw material balls specifically includes:

[0041] The raw clay pellets are added to a high-temperature furnace and preheated at 300-500℃ for 10-60 minutes. Then, the temperature is increased to 1050-1200℃ at a heating rate of 5-20℃ / min, and sintered for 1-60 minutes.

[0042] In some embodiments, naturally curing ceramic sand raw material balls in an indoor environment specifically includes:

[0043] Place the ceramic sand raw material balls in an indoor environment and cure them for 1 to 3 days at a temperature of 20±3℃ and a relative humidity of 60±5%RH.

[0044] In some embodiments, the mixture is added to a granulator for granulation, and water is added in multiple batches (specifically 3 to 5 times) for stirring and granulation to obtain ceramic sand raw material balls; during the granulation process, the granulator rotation speed is 60 to 120 r / min, the rotation angle is 30 to 60°, and the rotation time is 5 to 25 min; the particle size of the ceramic sand raw material balls is 1.18 to 4.75 mm.

[0045] In some embodiments, aluminum waste residue, steel slag powder, and aeolian sand powder are mixed and placed in a disperser and dispersed for 3-5 minutes to obtain a mixture.

[0046] In some embodiments, the method for preparing aeolian sand powder is as follows: the aeolian sand is placed in an oven and dried, the dried aeolian sand is crushed and powdered, and then passed through a 200-mesh square hole sieve to obtain aeolian sand powder.

[0047] The aeolian sand sintered ceramic sand and its preparation method of the present invention have at least the following advantages: The present invention utilizes aluminum waste slag as the aluminum material and steel slag powder as the fluxing agent to prepare sintered ceramic sand, turning polluting industrial waste into a valuable resource; the present invention utilizes aeolian sand powder as the siliceous material and prepares aeolian sand sintered ceramic sand with a large amount of aeolian sand powder, playing a positive role in the sustainable development of mineral resources and the resource utilization of aeolian sand; the aeolian sand sintered ceramic sand prepared by the present invention through the combination of various raw materials has a bulk density of less than 1200 kg / m³. 3 The compressive strength of the material can reach over 22MPa, and the water absorption rate is less than 10% in 1 hour. It belongs to high-strength lightweight aggregate. By reasonably controlling the formula ratio, the product has excellent performance.

[0048] The sintered aeolian sand ceramic sand prepared by this invention has excellent properties in all aspects. While realizing the recycling and reuse of industrial waste, the large amount of aeolian sand powder added is of great significance for maximizing resource utilization, environmental protection, and the sustainable production and development of ceramic sand.

[0049] The following specific embodiments further illustrate the sintered aeolian ceramsite sand and its preparation method of this application. This section further illustrates the content of the present invention in conjunction with specific embodiments, but should not be construed as limiting the present invention. Unless otherwise specified, the technical means used in the embodiments are conventional means well known to those skilled in the art. Unless otherwise specified, the reagents, methods, and equipment used in the present invention are conventional reagents, methods, and equipment in the art.

[0050] Example 1

[0051] This embodiment provides a sintered aeolian sand ceramic sand, comprising the following components by weight: 70 parts aeolian sand powder, 20 parts aluminum waste residue, 10 parts steel slag powder, and 30 parts water;

[0052] The average particle size of the aeolian sand powder is 0.035 mm.

[0053] Aluminum waste residue is fly ash;

[0054] Steel slag powder comprises the following components by mass fraction: SiO2 17%, Al2O3 8.55%, Fe2O3 18%, CaO 38.5%, MgO 9.5%, Na2O 1.7%, K2O 1.5%, MnO 3.55%, TiO2 1.65%, and unavoidable impurities 0.05%.

[0055] The average particle size of the aluminum waste is 0.045 mm;

[0056] The average particle size of the steel slag powder is 0.05 mm.

[0057] This embodiment also provides a method for preparing the above-mentioned sintered aeolian ceramsite sand, including the following steps:

[0058] S1. Mix aluminum waste residue, steel slag powder, and aeolian sand powder, then place them in a disperser and disperse for 5 minutes to obtain a mixture.

[0059] S2. Add the mixture to the granulator and add water in three batches (each time with the same amount of water), stir and granulate to obtain ceramic sand raw material balls; during the granulation process, the granulator rotation speed is 60 r / min, the rotation angle is 45°, and the rotation time is 10 min; the average particle size of the ceramic sand raw material balls is 2.32 mm;

[0060] S3. Place the ceramic sand raw material balls in an indoor environment and cure them for 1 day at a temperature of 20℃ and a relative humidity of 60%RH.

[0061] S4. Add the cured ceramic sand raw material balls to a high-temperature furnace and preheat at 450℃ for 30 minutes. Then, raise the temperature to 1150℃ at a heating rate of 5-20℃ / min and sinter for 30 minutes. Cool to room temperature to obtain sintered aeolian ceramic sand.

[0062] Example 2

[0063] This embodiment provides a sintered aeolian sand ceramic sand, comprising the following components by weight: 60 parts aeolian sand powder, 30 parts aluminum waste slag, 10 parts steel slag powder, and 30 parts water;

[0064] The average particle size of the aeolian sand powder is 0.035 mm.

[0065] Aluminum waste residue is fly ash;

[0066] Steel slag powder comprises the following components by mass fraction: SiO2 17%, Al2O3 8.55%, Fe2O3 18%, CaO 38.5%, MgO 9.5%, Na2O 1.7%, K2O 1.5%, MnO 3.55%, TiO2 1.65%, and unavoidable impurities 0.05%.

[0067] The average particle size of the aluminum waste is 0.045 mm;

[0068] The average particle size of the steel slag powder is 0.05 mm.

[0069] This embodiment also provides a method for preparing the above-mentioned sintered aeolian ceramsite sand, including the following steps:

[0070] S1. Mix aluminum waste residue, steel slag powder, and aeolian sand powder, then place them in a disperser and disperse for 5 minutes to obtain a mixture.

[0071] S2. Add the mixture to the granulator and add water in three batches (each time with the same amount of water), stir and granulate to obtain ceramic sand raw material balls; during the granulation process, the granulator rotation speed is 60 r / min, the rotation angle is 45°, and the rotation time is 10 min; the average particle size of the ceramic sand raw material balls is 2.28 mm;

[0072] S3. Place the ceramic sand raw material balls in an indoor environment and cure them for 1 day at a temperature of 20℃ and a relative humidity of 60%RH.

[0073] S4. Add the cured ceramic sand raw material balls to a high-temperature furnace and preheat at 450℃ for 30 minutes. Then, raise the temperature to 1150℃ at a heating rate of 5-20℃ / min and sinter for 30 minutes. Cool to room temperature to obtain sintered aeolian ceramic sand.

[0074] Example 3

[0075] This embodiment provides a sintered aeolian sand ceramic sand, comprising the following components by weight: 70 parts aeolian sand powder, 20 parts aluminum waste residue, 10 parts steel slag powder, and 30 parts water;

[0076] The average particle size of the aeolian sand powder is 0.035 mm.

[0077] The aluminum waste residue is coal gangue powder;

[0078] Steel slag powder comprises the following components by mass fraction: SiO2 17%, Al2O3 8.55%, Fe2O3 18%, CaO 38.5%, MgO 9.5%, Na2O 1.7%, K2O 1.5%, MnO 3.55%, TiO2 1.65%, and unavoidable impurities 0.05%.

[0079] The average particle size of the aluminum waste is 0.045 mm;

[0080] The average particle size of the steel slag powder is 0.05 mm.

[0081] This embodiment also provides a method for preparing the above-mentioned sintered aeolian ceramsite sand, including the following steps:

[0082] S1. Mix aluminum waste residue, steel slag powder, and aeolian sand powder, then place them in a disperser and disperse for 5 minutes to obtain a mixture.

[0083] S2. Add the mixture to the granulator and add water in three batches (each time with the same amount of water), stir and granulate to obtain ceramic sand raw material balls; during the granulation process, the granulator rotation speed is 60 r / min, the rotation angle is 45°, and the rotation time is 10 min; the average particle size of the ceramic sand raw material balls is 2.36 mm;

[0084] S3. Place the ceramic sand raw material balls in an indoor environment and cure them for 1 day at a temperature of 20℃ and a relative humidity of 60%RH.

[0085] S4. Add the cured ceramic sand raw material balls to a high-temperature furnace and preheat at 450℃ for 30 minutes. Then, raise the temperature to 1150℃ at a heating rate of 5-20℃ / min and sinter for 30 minutes. Cool to room temperature to obtain sintered aeolian ceramic sand.

[0086] Example 4

[0087] This embodiment provides a sintered aeolian sand ceramic sand, comprising the following components by weight: 60 parts aeolian sand powder, 30 parts aluminum waste slag, 10 parts steel slag powder, and 30 parts water;

[0088] The average particle size of the aeolian sand powder is 0.035 mm.

[0089] The aluminum waste residue is coal gangue powder;

[0090] Steel slag powder comprises the following components by mass fraction: SiO2 17%, Al2O3 8.55%, Fe2O3 18%, CaO 38.5%, MgO 9.5%, Na2O 1.7%, K2O 1.5%, MnO 3.55%, TiO2 1.65%, and unavoidable impurities 0.05%.

[0091] The average particle size of the aluminum waste is 0.045 mm;

[0092] The average particle size of the steel slag powder is 0.05 mm.

[0093] This embodiment also provides a method for preparing the above-mentioned sintered aeolian ceramsite sand, including the following steps:

[0094] S1. Mix aluminum waste residue, steel slag powder, and aeolian sand powder, then place them in a disperser and disperse for 5 minutes to obtain a mixture.

[0095] S2. Add the mixture to the granulator and add water in three batches (each time with the same amount of water), stir and granulate to obtain ceramic sand raw material balls; during the granulation process, the granulator rotation speed is 60 r / min, the rotation angle is 45°, and the rotation time is 10 min; the average particle size of the ceramic sand raw material balls is 2.41 mm;

[0096] S3. Place the ceramic sand raw material balls in an indoor environment and cure them for 1 day at a temperature of 20℃ and a relative humidity of 60%RH.

[0097] S4. Add the cured ceramic sand raw material balls to a high-temperature furnace and preheat at 450℃ for 30 minutes. Then, raise the temperature to 1150℃ at a heating rate of 5-20℃ / min and sinter for 30 minutes. Cool to room temperature to obtain sintered aeolian ceramic sand.

[0098] Performance testing

[0099] The sintered aeolian sand prepared in Examples 1 to 4 was tested for compressive strength, apparent density, bulk density and water absorption rate in accordance with "Lightweight aggregates and their test methods Part 2: Lightweight aggregate test methods (GB / T 17431.2-2010)". The results are shown in Table 1.

[0100] Table 1 - Properties of sintered aeolian ceramsite sand prepared in Examples 1-4

[0101]

[0102]

[0103] As can be seen from Table 1, the sintered aeolian ceramsite sand prepared in Example 1 has a cylinder compressive strength of 22.6 MPa and an apparent density of 1929 kg / m³. 3 The bulk density is 1157 kg / m³. 3 The water absorption rate was 4.0% in 1 hour; the compressive strength of the sintered aeolian ceramsite prepared in Example 2 was 20.3 MPa, and the apparent density was 1868 kg / m³. 3 The bulk density is 1183 kg / m³. 3 The water absorption rate was 6.2% in 1 hour; the compressive strength of the sintered aeolian ceramsite prepared in Example 3 was 20.5 MPa, and the apparent density was 1795 kg / m³. 3 The bulk density is 1071 kg / m³ 3 The water absorption rate was 8.5% in 1 hour; the compressive strength of the sintered aeolian ceramsite prepared in Example 4 was 18.9 MPa, and the apparent density was 1753 kg / m³. 3 The bulk density is 1066 kg / m³. 3The water absorption rate is 9.3% in 1 hour. The bulk density of the sintered aeolian ceramsite prepared in Examples 1-4 is less than 1200 kg / m³. 3 With a maximum compressive strength of 22.6 MPa and a water absorption rate of less than 10% in 1 hour, it belongs to high-strength lightweight aggregate and has high application value.

[0104] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A type of sintered aeolian clay, characterized in that, It comprises the following components by weight: 60-70 parts aeolian sand powder, 20-30 parts aluminum waste residue, 10 parts steel slag powder, and 30 parts water; The particle size of the aeolian sand powder is ≤0.075mm; The aluminum waste residue includes at least one of coal gangue powder and fly ash; The steel slag powder comprises the following components by mass fraction: SiO2 14%-18%, Al2O3 7%-9%, Fe2O3 16%-20%, CaO 36%-40%, MgO 8%-10%, Na2O 1%-2%, K2O 1%-2%, MnO 3%-5%, TiO2 1%-2%, and unavoidable impurities <0.1%. The method for preparing sintered aeolian ceramsite includes the following steps: Aluminum waste residue, steel slag powder, and aeolian sand powder are mixed to obtain a mixture. The mixture is added to a granulator, and water is added to granulate the material to obtain ceramic sand raw material balls. Place the clay sand raw material balls in an indoor environment for natural curing; Sintering the naturally cured clay raw material balls yields sintered aeolian clay. The sintering of naturally cured clay sand raw material balls specifically includes: Add the raw clay pellets to a high-temperature furnace and preheat at 300~500℃ for 10~60min. Then, heat the furnace to a sintering temperature of 1050~1200℃ at a heating rate of 5~20℃ / min and sinter for 30~60min. The natural curing of ceramic sand raw material balls in an indoor environment specifically includes: Place the ceramic raw material balls in an indoor environment and cure them for 1-3 days at a temperature of 20±3℃ and a relative humidity of 60±5%RH.

2. The sintered aeolian ceramsite sand as described in claim 1, characterized in that, The particle size of the aluminum waste residue is ≤0.075mm; And / or, the particle size of the steel slag powder is ≤0.075mm.

3. A method for preparing sintered aeolian ceramsite as described in any one of claims 1 to 2, characterized in that, Includes the following steps: Aluminum waste residue, steel slag powder, and aeolian sand powder are mixed to obtain a mixture. The mixture is added to a granulator, and water is added to granulate the material to obtain ceramic sand raw material balls. Place the clay sand raw material balls in an indoor environment for natural curing; Sintering the naturally cured clay raw material balls yields sintered aeolian clay. The sintering of naturally cured clay sand raw material balls specifically includes: Add the raw clay pellets to a high-temperature furnace and preheat at 300~500℃ for 10~60min. Then, heat the furnace to a sintering temperature of 1050~1200℃ at a heating rate of 5~20℃ / min and sinter for 30~60min. The natural curing of ceramic sand raw material balls in an indoor environment specifically includes: Place the ceramic sand raw material balls in an indoor environment and cure them for 1~3 days at a temperature of 20±3℃ and a relative humidity of 60±5%RH.

4. The method for preparing sintered aeolian ceramsite as described in claim 3, characterized in that, The mixture is added to a granulator for granulation, and water is added in multiple batches for stirring and granulation to obtain ceramic sand raw material balls; during the granulation process, the granulator rotation speed is 60~120r / min, the rotation angle is 30~60°, and the rotation time is 5~25min; the particle size of the ceramic sand raw material balls is 1.18~4.75mm.

5. The method for preparing sintered aeolian ceramsite as described in claim 3, characterized in that, Aluminum waste residue, steel slag powder, and aeolian sand powder are mixed and placed in a disperser and dispersed for 3-5 minutes to obtain a mixture.

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