A method of synthesizing a smelted fly ash-based mesoporous material

Abstract

The present application relates to the technical field of industrial solid waste utilization, and discloses a synthesis method of smelting fly ash-based mesoporous material, which uses smelting fly ash as a main raw material, uniformly mixes sodium carbonate and smelting fly ash at a specific ratio, and calcines at a suitable temperature, so as to destroy the difficult-to-dissolve glass phase and mullite phase in the smelting fly ash, make the smelting fly ash form a low-carbon cerchi stone phase which is easy to react with acid, and react with low-concentration hydrochloric acid, so as to prepare a mesoporous material with large specific surface area and pore volume and concentrated pore size distribution. The specific surface area of the best sample in the present application is 567.45 m2 / g, the pore volume is 0.95 cm3 / g, the most probable pore diameter is 18.30 nm, the Si / Al ratio is 3.65, and the yield is 44.59%. The preparation process of the method is simple, does not need to use expensive template agents, has high implementability and production safety in actual production, and realizes high-value utilization of smelting fly ash.

Description

Technical Field

[0001] This invention relates to the field of industrial solid waste utilization technology, and in particular to a method for synthesizing mesoporous materials based on smelting fly ash. Background Technology

[0002] The smelting fly ash raw material used in this invention is generated during the reduction of coal gangue in an electric arc furnace to produce aluminum-silicon alloys. Its chemical composition is mainly silicon oxide and aluminum oxide. Although similar to the composition of fly ash from traditional coal-fired power plants, smelting fly ash has the significant characteristics of finer particle size and higher chemical activity, belonging to a new type of industrial solid waste with a special composition. With the large-scale advancement of the high-value utilization industry of coal gangue, the generation of smelting fly ash has shown a continuous growth trend. If traditional stockpiling methods are used, not only will it occupy a large amount of land resources, but the ultrafine particles and potentially harmful components it contains may also threaten the ecological environment and human health through atmospheric diffusion and soil infiltration. Therefore, it is necessary to treat smelting fly ash and explore how to apply it to high-value-added applications.

[0003] Mesoporous materials are a class of porous solid materials with pore sizes ranging from 2 to 50 nm. Their core characteristics include high specific surface area, regular pore structure, and narrow pore size distribution. They are commonly used in industrial adsorption and catalyst applications. Traditional fly ash can be treated with heat preservation, high pressure, and template agents to form mesoporous materials. However, due to the unique physicochemical properties of smelting fly ash, its reaction mechanism differs significantly from that of fly ash when treated in similar ways.

[0004] Compared with the Chinese invention patent CN115231597A, "A Fly Ash-Based Mesoporous Silicon-Aluminum Composite Oxide Material and Its Preparation Method," the preparation method described in this invention uses sodium hydroxide to perform high-temperature, high-pressure supercritical (subcritical) treatment on fly ash in a reactor to extract silicon, followed by the use of a template agent to prepare the mesoporous material. This process involves harsh reaction conditions, a complex technical path, and, due to the use of a template agent, results in low yield and high preparation cost, making it unsuitable for industrial production.

[0005] Compared with the preparation method of "Preparation Method of Fly Ash-Based Mesoporous Material for Waste Gas Treatment" disclosed in Chinese Invention Patent Application Publication No. CN117205885A, the preparation method of this invention involves mixing a polymerization inhibitor with fly ash, acid washing to remove silicon, adding a surfactant to the resulting acid solution for hydroboration reaction, and finally obtaining the mesoporous material. This preparation method is overly complex, has a small reaction window, and the pore structure of the mesoporous material is highly sensitive to temperature and pressure during the reaction process, which is not conducive to large-scale industrial production.

[0006] Compared with the Chinese invention patent CN110975811A, "A Method and Application for Preparing Adsorbents Using High-Alumina Fly Ash," the preparation method described in this invention, while also using a certain amount of sodium carbonate to activate the fly ash and subsequently subjecting it to acid leaching, suffers from several drawbacks. The raw materials used in the aforementioned invention are derived from fly ash produced by coal-fired power plants, resulting in fundamental differences in chemical composition and physical properties compared to the raw materials used in this invention. Furthermore, although the aforementioned invention uses expensive template agents as raw materials, its overall economic efficiency is low, making it unsuitable for large-scale industrial production.

[0007] Regarding the above-mentioned and existing related technologies, the inventors believe that the following defects often exist: the preparation of traditional mesoporous materials often relies on key raw materials and equipment such as high-temperature and high-pressure reactors, template agents, surfactants or polymerization inhibitors. Not only is the synthesis technology route complex and the reaction process difficult to control, but the applicable range of raw materials is also limited, resulting in high preparation costs and low yield of synthesized mesoporous materials, making it difficult to meet the needs of large-scale industrial production. Summary of the Invention

[0008] The technical problem to be solved by this invention is that the existing technology has the disadvantages of complex synthesis routes and limited application range of raw materials, resulting in high preparation costs and low synthesis yield of mesoporous materials. To address this, we propose a synthesis method for smelting fly ash-based mesoporous materials.

[0009] To achieve the above objectives, this application adopts the following technical solution: a method for synthesizing a fly ash-based mesoporous material, comprising the following steps:

[0010] S1: Smelting fly ash and sodium carbonate are fed into a planetary ball mill in a certain proportion, so that the planetary ball mill can mix and mill the smelting fly ash and sodium carbonate to obtain a uniform mixture A.

[0011] S2: The mixture A in S1 is placed in an alumina crucible and calcined in a muffle furnace. The temperature is continuously raised to the set value. After calcination and holding, the temperature is lowered and cooled to obtain block solid A. The block solid A is crushed and ground by a planetary ball mill to obtain activated smelting fly ash S / DHH.

[0012] S3: The activated smelting fly ash S / DHH in S2 is mixed with dilute hydrochloric acid in a certain mass ratio and acid leached to obtain mixture solution A. Mixture solution A is stirred and heated in a water bath and finally cooled naturally to obtain mixture solution B.

[0013] S4: The mixture solution B obtained in S3 is washed and filtered multiple times through medium-speed qualitative filter paper. When the filtrate is close to neutral, a gel-like solid A is obtained. Finally, the gel-like solid A is placed in a forced-air drying oven for drying. After drying, the mesoporous material S / DJK is obtained.

[0014] Preferably, in step S1, the amount of smelting fly ash is 10g and the amount of sodium carbonate is 3g-8g.

[0015] Preferably, in step S2, the muffle furnace is heated to 800~1200℃ at a rate of 2-8℃ / min, and the holding time is 90-180min.

[0016] Preferably, in step S1, the ball-to-material ratio in the planetary ball mill is 1:3, the operating frequency of the planetary ball mill is 50 Hz, the single running time is 20 min, one cycle is one alternating forward and reverse operation, and a total of ten cycles are performed.

[0017] Preferably, in step S2, the planetary ball mill uses the same ball milling parameters as in S1 to crush and grind the blocky solid A.

[0018] Preferably, the activated smelting fly ash S / DHH added in step S3 is 5g.

[0019] Preferably, the concentration of dilute hydrochloric acid in step S3 is 0.5-2 mol / L, and the solid-liquid ratio of activated smelting fly ash S / DHH to dilute hydrochloric acid is 1:20~1:30.

[0020] Preferably, the water bath temperature in step S3 is 70~100℃, and the heating reaction time is 2-3 hours.

[0021] Preferably, the blowing drying temperature in step S4 is 80~100℃, and the drying time is 8~15 hours.

[0022] Preferably, the specific surface area of ​​the mesoporous material S / DJK prepared in step S4 ranges from 281.75 to 567.45 m². 2 / g, pore volume range is 0.54-1.05cm 3 / g, with the most probable pore size ranging from 13.10 to 18.94 nm.

[0023] The technical effects and advantages of this invention are as follows:

[0024] In this invention, smelting fly ash and sodium carbonate are ball-milled and mixed to homogenize the reactants before calcination. This process promotes the formation of a low-caloric-content matrix phase that readily reacts with acids from the insoluble glass and mullite phases in the fly ash. Finally, soluble components are effectively dissolved in hydrochloric acid solution to form a mesoporous structure. The resulting gel-like solid is then dried to obtain a high specific surface area mesoporous material with an amorphous structure. This method eliminates the need for expensive template agents or complex pH adjustments, and uses low-concentration hydrochloric acid, greatly simplifying the production process, reducing preparation costs, and increasing the synthesis yield of mesoporous materials, thus meeting the needs of large-scale industrial production. Attached Figure Description

[0025] The disclosure of this invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings, the same reference numerals are used to refer to the same parts:

[0026] Figure 1 This is a flowchart illustrating the specific process of the experiment described in this invention;

[0027] Figure 2 This is the XRD pattern and schematic diagram of the main crystal phases of the smelting fly ash used in this invention;

[0028] Figure 3 (1)-(6) are XRD patterns and main crystal phase diagrams of activated smelting fly ash in various embodiments and comparative examples of the present invention;

[0029] Figure 4 Figures (1)-(6) are XRD patterns of the mesoporous materials prepared in the various embodiments and comparative examples of this invention;

[0030] Figure 5 Figures (1)-(6) show the N2 adsorption-desorption isotherms and corresponding pore size distribution diagrams of the mesoporous materials prepared in the various embodiments and comparative examples of this invention.

[0031] Figure 6 This is a SEM image of the mesoporous material prepared in Comparative Example 1; Detailed Implementation

[0032] It is readily understood that, based on the technical solution of this invention, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of the invention. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this invention and should not be considered as the entirety of the invention or as limitations or restrictions on the technical solution of this invention.

[0033] Example 1

[0034] S1: Weigh 10g of smelting fly ash and 3g of sodium carbonate into a ball mill jar. The ball-to-material ratio is 1:3. The planetary ball mill operates at a frequency of 50 Hz and a single run time of 20 min. One cycle consists of alternating forward and reverse runs. A total of ten cycles are performed. The mixture A is obtained by pulverizing and grinding the mixture using the planetary ball mill.

[0035] S2: The mixture A obtained in S1 is placed in an alumina crucible, and the alumina crucible is sent to a muffle furnace for calcination. The temperature is increased to 800℃ at a rate of 5℃ / min, and then held at that temperature for 2 hours. After cooling naturally to room temperature in the furnace, it is taken out and pulverized and ground using the same ball milling parameters as in S1 to obtain activated smelting fly ash SHH-1. Figure 3 XRD tests in (1) show that its composition is mainly NaAlSiO4, its crystal structure is mainly composed of nepheline, and its crystal phase is relatively simple.

[0036] S3: Weigh 5g of activated smelting fly ash SHH-1, add 100ml of 1.2mol / L dilute hydrochloric acid for acid etching to obtain mixture solution A. Then put mixture solution A into a reaction vessel and place it in a 70℃ water bath for constant temperature stirring. The reaction time is 2h. After the reaction is complete, remove the vessel and let it cool naturally at room temperature to obtain mixture solution B.

[0037] S4: The mixture solution B obtained in S3 is washed and filtered multiple times through medium-speed qualitative filter paper. When the filtrate is close to neutral, a gel-like solid A is obtained. The gel-like solid A is placed in a forced-air drying oven and dried at 80°C for 8 hours to obtain the desired mesoporous material SJK-1. Figure 4 The XRD test in (1) shows that it is mainly composed of amorphous aluminosilicate phase, and according to Figure 5 (1) The N2 adsorption-desorption isotherm and pore size distribution diagram of the mesoporous material are used to calculate its specific surface area, which is 281.75 m². 2 / g, pore volume 0.54cm 3 / g, with a most probable pore size of 18.70nm, m(Si):m(Al)=0.96, and an overall yield of 47.62%.

[0038] Example 2

[0039] S1: Weigh 10g of smelting fly ash and 4.5g of sodium carbonate into a ball mill jar. The ball-to-material ratio is 1:3. The planetary ball mill operates at a frequency of 50 Hz and a single run time of 20 min. One cycle consists of alternating forward and reverse runs. A total of ten cycles are performed. The mixture A is obtained by grinding and pulverizing the mixture using a planetary ball mill.

[0040] S2: Place the mixture A obtained in S1 into an alumina crucible and send the alumina crucible to a muffle furnace for calcination. Heat the crucible to 950°C at a rate of 2°C / min, then hold it at that temperature for 2 hours. After cooling naturally to room temperature in the furnace, remove the crucible and grind the activated smelting fly ash using the same ball milling parameters as in S1 to obtain activated smelting fly ash SHH-2. Figure 3 (2) XRD test shows that its composition is mainly NaAlSiO4, its crystal structure is mainly composed of nepheline, and its crystal phase is relatively simple.

[0041] S3: Weigh 5g of activated smelting fly ash SHH-2, add 105ml of 0.5mol / L dilute hydrochloric acid for acid etching to obtain mixture solution A. Then put mixture solution A into a reaction vessel and place it in an 80℃ water bath for constant temperature stirring for 2 hours. After the reaction is complete, remove the vessel and allow it to cool naturally at room temperature to obtain mixture solution B.

[0042] S4: The mixture solution B obtained in S3 is washed and filtered multiple times through medium-speed qualitative filter paper. When the filtrate is close to neutral, a gel-like solid A is obtained. The gel-like solid A is placed in a forced-air drying oven and dried at 90°C for 12 hours to obtain the desired mesoporous material SJK-2. Figure 4 The XRD test in (2) shows that it is mainly composed of amorphous aluminosilicate phase, and according to Figure 5 (2) The N2 adsorption-desorption isotherm and pore size distribution diagram of the mesoporous material were used to calculate its specific surface area, which was 353.82 m². 2 / g, pore volume is 0.66cm 3 / g, with a most probable pore size of 18.58nm, m(Si):m(Al)=1.40, and an overall yield of 46.23%.

[0043] Example 3

[0044] S1: Weigh 10g of smelting fly ash and 6g of sodium carbonate into a ball mill jar. The ball-to-material ratio is 1:3. The planetary ball mill operates at a frequency of 50 Hz and a single run time of 20 min. One cycle consists of alternating forward and reverse runs. A total of ten cycles are performed. The mixture A is obtained by pulverizing and grinding the mixture using a planetary ball mill.

[0045] S2: Place the mixture A obtained in S1 into an alumina crucible and send the alumina crucible to a muffle furnace for calcination. Heat the crucible to 900°C at a rate of 6°C / min, then hold it at that temperature for 2 hours. After cooling naturally to room temperature in the furnace, remove the crucible and grind the activated smelting fly ash using the same ball milling parameters as in S1 to obtain activated smelting fly ash SHH-3. Figure 3XRD tests in (3) show that its composition is mainly NaAlSiO4 and its crystal phase is a single-phase structure mainly composed of low-calorie matrix.

[0046] S3: Weigh 5g of activated smelting fly ash SHH-3, add 105ml of 1mol / L dilute hydrochloric acid for acid etching to obtain mixture solution A. Then put mixture solution A into a reaction vessel and place it in a 95℃ water bath for constant temperature stirring for 3h. After the reaction is complete, remove the vessel and let it cool naturally at room temperature to obtain mixture solution B.

[0047] S4: The mixture solution B obtained in S3 is washed and filtered multiple times through medium-speed qualitative filter paper. When the filtrate is close to neutral, a gel-like solid A is obtained. The gel-like solid A is placed in a forced-air drying oven and dried at 80°C for 13 hours to obtain the desired mesoporous material SJK-3. Figure 4 The XRD test in (3) shows that it is mainly composed of amorphous aluminosilicate phase, and according to Figure 5 (3) The N2 adsorption-desorption isotherm and pore size distribution diagram of the mesoporous material were used to calculate its specific surface area, which was 365.12 m². 2 / g, pore volume 0.64 cm³ 3 / g, with a most probable pore size of 18.94nm, m(Si):m(Al)=2.01, and an overall yield of 44.76%.

[0048] Example 4

[0049] S1: Weigh 10g of smelting fly ash and 7.5g of sodium carbonate into a ball mill jar. The ball-to-material ratio is 1:3. The planetary ball mill operates at a frequency of 50 Hz and a single run time of 20 min. One cycle consists of alternating forward and reverse runs. A total of ten cycles are performed. The mixture A is obtained by grinding and pulverizing the mixture using the planetary ball mill.

[0050] S2: Place the mixture A obtained in S1 into an alumina crucible and send the alumina crucible to a muffle furnace for calcination. Heat the crucible to 1050℃ at a rate of 3℃ / min, then hold it at that temperature for 2.5h. After cooling naturally to room temperature in the furnace, remove the crucible and grind the activated smelting fly ash using the same ball milling parameters as in S1 to obtain activated smelting fly ash SHH-4. Figure 3 XRD tests in (4) show that its composition is mainly NaAlSiO4 and its crystal phase is a single-phase structure mainly composed of low-calorie matrix.

[0051] S3: Weigh 5g of activated smelting fly ash SHH-4, add 110ml of 1.3mol / L dilute hydrochloric acid for acid etching to obtain mixture solution A. Then put mixture solution A into a reaction vessel and place it in a 95℃ water bath for constant temperature stirring. The reaction time is 2h. After the reaction is complete, remove the vessel and let it cool naturally at room temperature to obtain mixture solution B.

[0052] S4: The mixture solution B obtained in S3 is washed and filtered multiple times through medium-speed qualitative filter paper. When the filtrate is close to neutral, a gel-like solid A is obtained. The gel-like solid A is placed in a forced-air drying oven and dried at 95°C for 15 hours to obtain the desired mesoporous material SJK-4. Figure 4 The XRD test in (4) shows that it is mainly composed of amorphous aluminosilicate phase, and according to Figure 5 (4) The N2 adsorption-desorption isotherm and pore size distribution diagram of the mesoporous material were used to calculate its specific surface area, which was 397.32 m². 2 / g, pore volume 0.69cm 3 / g, with a most probable pore size of 13.15nm, m(Si):m(Al)=3.30, and an overall yield of 42.32%.

[0053] Example 5

[0054] S1: Weigh 10g of smelting fly ash and 7.5g of sodium carbonate into a ball mill jar. The ball-to-material ratio is 1:3. The planetary ball mill operates at a frequency of 50 Hz and a single run time of 20 min. One cycle consists of alternating forward and reverse runs. A total of ten cycles are performed. The mixture A is obtained by grinding and pulverizing the mixture using the planetary ball mill.

[0055] S2: Place the mixture A obtained in S1 into an alumina crucible and send the alumina crucible to a muffle furnace for calcination. Heat the crucible to 1200℃ at a rate of 8℃ / min, then hold it at that temperature for 3 hours. After cooling naturally to room temperature in the furnace, remove the crucible and grind the activated smelting fly ash using the same ball milling parameters as in S1 to obtain activated smelting fly ash SHH-5. Figure 3 XRD tests in (5) show that its composition is mainly NaAlSiO4 and its crystal phase is a single-phase structure mainly composed of low-calorie matrix.

[0056] S3: Weigh 5g of activated smelting fly ash SHH-5, add 115ml of 0.7mol / L dilute hydrochloric acid for acid etching to obtain mixture solution A. Then put mixture solution A into a reaction vessel and place it in a 100℃ water bath for constant temperature stirring. The reaction time is 2h. After the reaction is complete, remove the vessel and let it cool naturally at room temperature to obtain mixture solution B.

[0057] S4: The mixture solution B obtained in S3 is washed and filtered multiple times through medium-speed qualitative filter paper. When the filtrate is close to neutral, a gel-like solid A is obtained. The gel-like solid A is placed in a forced-air drying oven and dried at 100°C for 9 hours to obtain the desired mesoporous material SJK-5. Figure 4 The XRD test in (5) shows that it is mainly composed of amorphous aluminosilicate phase, and according to Figure 5 (5) The N2 adsorption-desorption isotherm and pore size distribution of the mesoporous material were analyzed. The N2 adsorption-desorption test results and ICP results were used to calculate the specific surface area, which is 418.59 m². 2 / g, pore volume 0.70 cm³ 3 / g, with a most probable pore size of 13.10nm, m(Si):m(Al)=3.46, and an overall yield of 41.08%.

[0058] Comparative Example 1

[0059] S1: Weigh 10g of smelting fly ash and 8g of sodium carbonate into a ball mill jar. The ball-to-material ratio is 1:3. The planetary ball mill operates at a frequency of 50 Hz and a single run time of 20 min. One cycle consists of alternating forward and reverse runs. A total of ten cycles are performed. The mixture A is obtained by pulverizing and grinding the mixture using the planetary ball mill.

[0060] S2: Place the mixture A obtained in S1 into an alumina crucible and send the alumina crucible to a muffle furnace for calcination. Heat the crucible to 1150℃ at a rate of 6℃ / min, then hold it at that temperature for 1.5h. After cooling naturally to room temperature in the furnace, remove the crucible and grind the activated smelting fly ash using the same ball milling parameters as in S1 to obtain activated smelting fly ash DHH-1. Figure 3 XRD tests in (6) show that its composition is mainly NaAlSiO4 and its crystal phase is a single-phase structure mainly composed of low-calorie matrix.

[0061] S3: Weigh 5g of activated smelting fly ash DHH-1, add 110ml of 2mol / L dilute hydrochloric acid for acid etching to obtain mixture solution A. Then put mixture solution A into a reaction vessel and place it in a water bath at 85℃ for constant temperature stirring for 2 hours. After the reaction is complete, remove the vessel and allow it to cool naturally at room temperature to obtain mixture solution B.

[0062] S4: The mixture solution B obtained in S3 is washed and filtered multiple times through medium-speed qualitative filter paper. When the filtrate is close to neutral, a gel-like solid A is obtained. The gel-like solid A is placed in a forced-air drying oven and dried at 95°C for 12 hours to obtain the desired mesoporous material DJK-1. Figure 4 The XRD test in (6) shows that it is mainly composed of amorphous aluminosilicate phase, and according to Figure 5(6) The N2 adsorption-desorption isotherm and pore size distribution diagram of the mesoporous material were used to calculate its N2 adsorption-desorption test results and ICP results. Its specific surface area is 567.45 m2 / g and its pore volume is 0.95 cm³. 3 / g, with a most probable pore size of 18.30 nm, m(Si):m(Al) = 3.65, and an overall yield of 44.59%. Figure 6 The image shows the microstructure of the mesoporous material DJK-1 under a scanning electron microscope. Multiple nanometer-sized pores can be clearly observed in the image, which are generated during the S3 process. The size of the pores basically matches the pore size distribution data obtained from the N2 adsorption-desorption test, further proving the feasibility of the preparation method in this invention.

[0063] By ball milling and mixing smelting fly ash and sodium carbonate to homogenize and refine the reactants, followed by calcination, the reaction proceeds... Figure 2 The insoluble glassy and mullite phases in smelting fly ash are transformed into a low-caloric nitrite phase that readily reacts with acids. The soluble components are then effectively dissolved in hydrochloric acid solution to form a gel-like solid. After drying the gel-like solid, a high specific surface area mesoporous material with an amorphous structure can be obtained. This method eliminates the need for expensive template agents or complex pH adjustments, greatly simplifying the production process, reducing preparation costs, and increasing the synthesis yield of mesoporous materials, thereby meeting the needs of large-scale industrial production.

[0064] Table 1: N2 adsorption-desorption test results of mesoporous materials

[0065]

[0066] The technical scope of this invention is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this invention, and all such modifications and variations should fall within the protection scope of this invention.

Claims

1. A method for synthesizing mesoporous materials based on smelting fly ash, characterized in that, Includes the following steps: S1: Smelting fly ash and sodium carbonate are fed into a planetary ball mill in a certain proportion, so that the planetary ball mill can mix and mill the smelting fly ash and sodium carbonate to obtain a uniform mixture A. S2: The mixture A in S1 is placed in an alumina crucible and calcined in a muffle furnace. The temperature is continuously raised to the set value. After calcination and holding, the temperature is lowered and cooled to obtain block solid A. The block solid A is crushed and ground by a planetary ball mill to obtain activated smelting fly ash. The muffle furnace is heated to 1150℃ at a rate of 6℃ / min and held for 1.5h. S3: The activated smelting fly ash in S2 is mixed with dilute hydrochloric acid with a concentration of 2 mol / L at a solid-liquid ratio of 1:22 g / ml for acid leaching to obtain mixture solution A. Mixture solution A is heated and stirred in a water bath at 85°C for 2 hours. After the reaction is completed, the container is removed and allowed to cool naturally to obtain mixture solution B. S4: The mixture solution B obtained in S3 is washed and filtered multiple times through medium-speed qualitative filter paper. When the filtrate is close to neutral, a gel-like solid A is obtained. Finally, the gel-like solid A is placed in a forced-air drying oven and dried at 95°C for 12 hours. After drying, the mesoporous material is obtained.

2. The method for synthesizing smelting fly ash-based mesoporous materials according to claim 1, characterized in that: In step S1, the amount of smelting fly ash is 10g and the amount of sodium carbonate is 3g-8g.

3. The method for synthesizing smelting fly ash-based mesoporous materials according to claim 1, characterized in that: In step S1, the ball-to-material ratio in the planetary ball mill is 1:3, the operating frequency of the planetary ball mill is 50Hz, the single running time is 20min, one cycle is one alternating forward and reverse operation, and a total of ten cycles are performed.

4. The method for synthesizing smelting fly ash-based mesoporous materials according to claim 3, characterized in that: In step S2, the planetary ball mill uses the same milling parameters as in S1 to crush and grind the blocky solid A.

5. The method for synthesizing smelting fly ash-based mesoporous materials according to claim 1, characterized in that: The activated smelting fly ash added in step S3 is 5g.

6. The method for synthesizing smelting fly ash-based mesoporous materials according to claim 1, characterized in that: The specific surface area of ​​the mesoporous material prepared in step S4 ranges from 281.75 to 567.45 μm. 2 / g, pore volume range is 0.54-1.05cm 3 / g, with the most probable pore size ranging from 13.10 to 18.94 nm.

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