A method for functional utilization of coal-fired power plant flue gas capture

Abstract

The present application relates to carbon dioxide storage, water purification technical field, specifically to a kind of coal-fired power plant flue gas capture object functionalization utilization method, and discloses a kind of coal-fired power plant flue gas capture object functionalization utilization method, comprising the following steps: taking steel slag as raw material, after preliminary grinding, obtain steel slag coarse powder, after grinding again, obtain steel slag micro powder;20~50 weight parts steel slag micro powder and 1~5 weight parts ammonium salt are uniformly mixed, to obtain mixed material, add water.The coal-fired power plant flue gas capture object functionalization utilization method, by taking steel slag as main raw material, synergistic ammonium salt liquid phase grinding is carried out, and is passed into coal-fired flue gas, on the one hand, liquid phase grinding is fully broken steel slag particle, promote the dissolution of calcium ion while increase the contact area of CO2 in coal-fired flue gas with steel slag, on the other hand, synergistic ammonium salt grinding can promote CO2 dissolution, two aspects simultaneously improve steel slag carbon fixation efficiency.

Description

Technical Field

[0001] This invention relates to the fields of carbon dioxide sequestration and water purification technology, specifically a method for the functional utilization of flue gas collected from coal-fired power plants. Background Technology

[0002] Chinese patents CN108262016A (a method for adsorbing and removing carbon dioxide from gas by steel slag) and CN103111186B (a method for strengthening the mineralization and fixation of carbon dioxide by steel slag) all suffer from problems such as high cost of carbon fixation, low efficiency of carbon fixation, and the inability of carbon fixation products to be applied in multiple scenarios.

[0003] Currently, the added value utilization of steel slag in China is relatively low. How to utilize steel slag for CO2 sequestration in coal-fired power plants and functionalize the products, so as to achieve high added value utilization of steel slag, permanent CO2 sequestration in coal-fired power plants, and functional utilization of carbon sequestration products, and achieve the goal of treating waste with waste and being environmentally friendly, is a problem that needs to be solved by those skilled in the art. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a method for the functional utilization of flue gas traps from coal-fired power plants, which has advantages such as high added value utilization of steel slag and solves the problem of low added value utilization of existing steel slag.

[0006] (II) Technical Solution

[0007] To achieve the aforementioned goal of high-value utilization of steel slag, the present invention provides the following technical solution:

[0008] A method for the functional utilization of flue gas traps from coal-fired power plants includes the following steps:

[0009] 1) Using steel slag as raw material, the lumpy steel slag is initially ground to obtain coarse steel slag powder, and then ground again to obtain fine steel slag powder;

[0010] 2) Mix 20-50 parts by weight of steel slag powder and 1-5 parts by weight of ammonium salt evenly to obtain a mixture. Add water and adjust the solid content to between 12.5% ​​and 33.3% to obtain mixed slurry A.

[0011] 3) Put slurry A into a stirred ball mill, grind for 10 minutes, add dispersant, continue grinding, and introduce coal flue gas to obtain carbon-fixing functional admixture;

[0012] 4) Take 20-40 parts by weight of carbon-fixing functional admixture, 40-80 parts by weight of cement, 30-55 parts by weight of fly ash, and 7-15 parts by weight of perlite particles, mix them evenly, and pour them into a round pot granulator.

[0013] 5) Start the granulator and then slowly spray water. After about 1 minute, you will see that the center of the rolling material has initially formed spherical particles. Adjust the nozzle slightly to slightly narrow the water flow. Spray water slowly at the edge of the rolling material to prepare carbon-fixing functional non-fired ceramsite.

[0014] Preferably, the median particle size of the steel slag powder is 40-60 μm, and the CaO content in the steel slag powder is not less than 30% and the Fe2O3 content is not less than 15%.

[0015] Preferably, the CO2 concentration of the introduced coal-fired flue gas is not less than 12%, and the gas velocity is 5L / min to 12L / min.

[0016] Preferably, the solid content represents the ratio of the mixture to water, and the ammonium salt is one of ammonium nitrate, ammonium chloride, ammonium acetate, and ammonium sulfate.

[0017] Preferably, the rotation speed of the stirred ball mill is 300-900 r / min, and the ball ratio of the stirred ball mill is m(0.5-0.8mm):m(0.8-1.1mm):m(1.1-1.4mm) = (1-3):(1-3):1.

[0018] Preferably, the dispersant is one of sodium dodecylbenzenesulfonate, sodium hexametaphosphate, and polyethylene glycol, and the carbon-fixing functional admixture has a pH value of 7-8, a median particle size of 2-5 μm, and an Fe(OH)3 content of not less than 15%.

[0019] Preferably, the perlite particles have a maximum particle size of no more than 2.63 mm, and the fly ash has a particle size range of 0.5 to 300 μm.

[0020] Preferably, the rotation speed of the circular pot granulator is 10-50 r / min, and the elevation angle of the circular pot granulator is 20°-45°.

[0021] Preferably, the water spraying lasts for about 0.5 to 2 seconds, with an interval of 5 to 10 seconds between each spraying, and each spray lasts for 1 to 3 seconds with an interval of 7 to 15 seconds between each spraying.

[0022] Preferably, the fineness modulus of the ceramsite is between 3.2 and 3.8, and the bulk density is between 442.7 kg / m3 and 581.1 kg / m3.

[0023] The mechanism of the method of the present invention is as follows:

[0024] This invention provides a method for capturing flue gas from coal-fired power plants and functionalizing the captured products. The overall concept is as follows: A certain mass fraction of carbon-fixing functional admixture is included in non-fired ceramsite. This carbon-fixing functional admixture uses steel slag as raw material, is ground in conjunction with ammonium salts, and coal-fired flue gas is introduced during the grinding process. The reaction proceeds to pH 7-8, resulting in a carbon-fixing functional admixture with a median particle size of 2-5 μm. Solid waste steel slag is highly alkaline and contains Ca, possessing certain carbon-fixing potential. It can react with CO2 in coal-fired flue gas to generate stable carbonate products. The main reaction equations are as follows:

[0025] ;

[0026] The main mineral components in steel slag are Ca2SiO3, Ca3SiO5, Ca2Fe2O5, and the RO phase. Therefore, calcium in steel slag is difficult to dissolve in aqueous media under mild environmental conditions, resulting in low mineralization efficiency. This invention utilizes a physical-mechanical-chemical dissolution coupling process, namely liquid-phase grinding, to fully break down steel slag particles and promote the dissolution of calcium in the steel slag. 2+ Ion dissolution promotes reactions a and b, and also facilitates grinding with ammonium salts, due to NH... 4+ The effect of this will increase the solubility of CO2 in water, thus promoting reactions c and d. Both of these factors together promote reaction f, thereby efficiently sequestering CO2 and giving the steel slag a higher carbon fixation efficiency.

[0027] Furthermore, by controlling the solid content ratio between 12.5% ​​and 33.3%, the material's fluidity is improved, thereby increasing grinding efficiency. Controlling the grinding time to be no less than 30 minutes and the air velocity to be no less than 2 L / min not only ensures the raw material is ground to 2-5 μm, promoting calcium ion dissolution, but also aids in the addition of ammonium salts for synergistic wet grinding, accelerating carbon dioxide dissolution, thus resulting in higher carbon fixation efficiency. Preferably, the ammonium salt is ammonium nitrate, ammonium chloride, ammonium acetate, or ammonium sulfate, more preferably ammonium acetate.

[0028] Furthermore, the iron oxides in steel slag undergo a carbonization reaction with CO2 to generate FeCO3 / Fe2(CO3)3. Subsequently, FeCO3 / Fe2(CO3)3 undergoes a hydrolysis reaction to generate Fe(OH)3, thus making the carbon-fixing functional admixture contain Fe(OH)3. Fe(OH)3 has a good adsorption effect on arsenic. By replacing part of the cementitious material with the carbon-fixing functional admixture and incorporating it into ceramsite, using perlite particles as nucleation sites, carbon-fixing functional non-fired ceramsite is prepared. While ensuring the basic performance of the ceramsite, it efficiently utilizes steel slag, not only effectively capturing carbon dioxide emitted from coal-fired power plants, but also showing good application prospects in arsenic adsorption in water treatment. This invention provides a new idea and method for the high-value utilization of steel slag, using solid waste to purify water bodies, thereby "turning waste into treasure".

[0029] (III) Beneficial Effects

[0030] Compared with the prior art, the present invention provides a method for the functional utilization of flue gas traps from coal-fired power plants, which has the following beneficial effects:

[0031] 1. The method for functional utilization of flue gas traps from coal-fired power plants involves using steel slag as the main raw material, combined with ammonium salt liquid-phase grinding, and then introducing coal-fired flue gas. On the one hand, the liquid-phase grinding fully breaks down the steel slag particles, promotes the dissolution of calcium ions, and increases the contact area between CO2 in the coal-fired flue gas and the steel slag. On the other hand, the combined grinding with ammonium salt can promote CO2 dissolution, thereby improving the carbon fixation efficiency of steel slag in both aspects.

[0032] 2. The method for functional utilization of flue gas traps from this coal-fired power plant utilizes Fe(OH)3 contained in the carbon fixation products of steel slag to prepare carbon-fixing functional admixtures, which are used to prepare carbon-fixing functional non-fired ceramsite. This ceramsite has a good adsorption effect on arsenic in water, thereby improving the added value of steel slag utilization. Attached Figure Description

[0033] Figure 1 This is a test diagram of an embodiment of a method for the functional utilization of flue gas traps from coal-fired power plants proposed in this invention. Detailed Implementation

[0034] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Example 1:

[0036] 1) Using steel slag as raw material, the lumpy steel slag is initially ground to obtain coarse steel slag powder, and then ground again to obtain fine steel slag powder;

[0037] 2) Mix 25 parts by weight of steel slag powder and 1 part by weight of ammonium salt evenly to obtain a mixture. Add water and adjust the solid content to between 12.5% ​​and 33.3% to obtain mixed slurry A.

[0038] 3) Put slurry A into a stirred ball mill and grind for 10 minutes. Then add dispersant and continue grinding. Introduce coal flue gas at a gas velocity of 5 L / min and react until the pH reaches 7-8 and the median particle size reaches 5 μm to obtain carbon-fixing functional admixture.

[0039] 4) Take carbon-fixing functional admixture, 40 parts by weight of cement, 30 parts by weight of fly ash, and 7 parts by weight of perlite particles, mix them evenly, and pour them into a round pot granulator.

[0040] 5) Start the granulator and then slowly spray water. After about 1 minute, you will see that the center of the rolling material has initially formed spherical particles. Adjust the nozzle slightly to slightly narrow the water flow. Spray water slowly at the edge of the rolling material to prepare carbon-fixing functional non-fired ceramsite.

[0041] Example 2:

[0042] 1) Using steel slag as raw material, the lumpy steel slag is initially ground to obtain coarse steel slag powder, and then ground again to obtain fine steel slag powder;

[0043] 2) Mix 30 parts by weight of steel slag powder and 2 parts by weight of ammonium salt evenly to obtain a mixture. Add water and adjust the solid content to between 12.5% ​​and 33.3% to obtain mixed slurry A.

[0044] 3) Put slurry A into a stirred ball mill and grind for 10 minutes. Then add dispersant and continue grinding. Introduce coal flue gas at a gas velocity of 7 L / min and react until the pH reaches 7-8 and the median particle size reaches 5 μm to obtain carbon-fixing functional admixture.

[0045] 4) Take carbon-fixing functional admixture, 45 parts by weight of cement, 35 parts by weight of fly ash, and 9 parts by weight of perlite particles, mix them evenly, and pour them into a round pot granulator.

[0046] 5) Start the granulator and then slowly spray water. After about 1 minute, you will see that the center of the rolling material has initially formed spherical particles. Adjust the nozzle slightly to slightly narrow the water flow. Spray water slowly at the edge of the rolling material to prepare carbon-fixing functional non-fired ceramsite.

[0047] Example 3:

[0048] 1) Using steel slag as raw material, the lumpy steel slag is initially ground to obtain coarse steel slag powder, and then ground again to obtain fine steel slag powder;

[0049] 2) Mix 35 parts by weight of steel slag powder and 4 parts by weight of ammonium salt evenly to obtain a mixture. Add water and adjust the solid content to between 12.5% ​​and 33.3% to obtain mixed slurry A.

[0050] 3) Put slurry A into a stirred ball mill and grind for 10 minutes. Then add dispersant and continue grinding. Introduce flue gas from coal combustion at a rate of 9 L / min. React until the pH reaches 7-8 and the median particle size reaches 5 μm to obtain a carbon-fixing functional admixture.

[0051] 4) Take carbon-fixing functional admixture, 55 parts by weight of cement, 40 parts by weight of fly ash, and 10 parts by weight of perlite particles, mix them evenly, and pour them into a round pot granulator.

[0052] 5) Start the granulator and then slowly spray water. After about 1 minute, you will see that the center of the rolling material has initially formed spherical particles. Adjust the nozzle slightly to slightly narrow the water flow. Spray water slowly at the edge of the rolling material to prepare carbon-fixing functional non-fired ceramsite.

[0053] Example 4:

[0054] 1) Using steel slag as raw material, the lumpy steel slag is initially ground to obtain coarse steel slag powder, and then ground again to obtain fine steel slag powder;

[0055] 2) Mix 40 parts by weight of steel slag powder and 3 parts by weight of ammonium salt evenly to obtain a mixture. Add water and adjust the solid content to between 12.5% ​​and 33.3% to obtain mixed slurry A.

[0056] 3) Put slurry A into a stirred ball mill and grind for 10 minutes. Then add dispersant and continue grinding. Introduce coal flue gas at a gas velocity of 10 L / min and react until the pH reaches 7-8 and the median particle size reaches 5 μm to obtain carbon-fixing functional admixture.

[0057] 4) Take carbon-fixing functional admixture, 65 parts by weight of cement, 43 parts by weight of fly ash, and 12 parts by weight of perlite particles, mix them evenly, and pour them into a round pot granulator.

[0058] 5) Start the granulator and then slowly spray water. After about 1 minute, you will see that the center of the rolling material has initially formed spherical particles. Adjust the nozzle slightly to slightly narrow the water flow. Spray water slowly at the edge of the rolling material to prepare carbon-fixing functional non-fired ceramsite.

[0059] Example 5:

[0060] 1) Using steel slag as raw material, the lumpy steel slag is initially ground to obtain coarse steel slag powder, and then ground again to obtain fine steel slag powder;

[0061] 2) Mix 45 parts by weight of steel slag powder and 4 parts by weight of ammonium salt evenly to obtain a mixture. Add water and adjust the solid content to between 12.5% ​​and 33.3% to obtain mixed slurry A.

[0062] 3) Put slurry A into a stirred ball mill and grind for 10 minutes. Then add dispersant and continue grinding. Introduce coal flue gas at a gas velocity of 11 L / min and react until the pH reaches 7-8 and the median particle size reaches 5 μm to obtain carbon-fixing functional admixture.

[0063] 4) Take carbon-fixing functional admixture, 70 parts by weight of cement, 50 parts by weight of fly ash, and 14 parts by weight of perlite particles, mix them evenly, and pour them into a round pot granulator.

[0064] 5) Start the granulator and then slowly spray water. After about 1 minute, you will see that the center of the rolling material has initially formed spherical particles. Adjust the nozzle slightly to slightly narrow the water flow. Spray water slowly at the edge of the rolling material to prepare carbon-fixing functional non-fired ceramsite.

[0065] Example 6:

[0066] 1) Using steel slag as raw material, the lumpy steel slag is initially ground to obtain coarse steel slag powder, and then ground again to obtain fine steel slag powder;

[0067] 2) Mix 50 parts by weight of steel slag powder and 5 parts by weight of ammonium salt evenly to obtain a mixture. Add water and adjust the solid content to between 12.5% ​​and 33.3% to obtain mixed slurry A.

[0068] 3) Put slurry A into a stirred ball mill and grind for 10 minutes. Then add dispersant and continue grinding. Introduce coal flue gas at a gas velocity of 12 L / min and react until the pH reaches 7-8 and the median particle size reaches 5 μm to obtain carbon-fixing functional admixture.

[0069] 4) Take carbon-fixing functional admixture, 80 parts by weight of cement, 55 parts by weight of fly ash, and 15 parts by weight of perlite particles, mix them evenly, and pour them into a round pot granulator.

[0070] 5) Start the granulator and then slowly spray water. After about 1 minute, you will see that the center of the rolling material has initially formed spherical particles. Adjust the nozzle slightly to slightly narrow the water flow. Spray water slowly at the edge of the rolling material to prepare carbon-fixing functional non-fired ceramsite.

[0071] Comparative Example 1:

[0072] 1) Using steel slag as raw material, the lumpy steel slag is initially ground to obtain coarse steel slag powder, and then ground again to obtain fine steel slag powder;

[0073] 2) Add water to 25 parts by weight of steel slag powder and adjust the solid content to between 12.5% ​​and 33.3% to obtain mixed slurry A;

[0074] 3) Put slurry A into a stirred ball mill and grind for 10 minutes. Then add dispersant and continue grinding. Introduce coal flue gas at a gas velocity of 5 L / min and react until the pH reaches 7-8 and the median particle size reaches 5 μm to obtain carbon-fixing functional admixture.

[0075] 4) Take carbon-fixing functional admixture, 40 parts by weight of cement, 30 parts by weight of fly ash, and 7 parts by weight of perlite particles, mix them evenly, and pour them into a round pot granulator.

[0076] 5) Start the granulator and then slowly spray water. After about 1 minute, you will see that the center of the rolling material has initially formed spherical particles. Adjust the nozzle slightly to slightly narrow the water flow. Spray water slowly at the edge of the rolling material to prepare carbon-fixing functional non-fired ceramsite.

[0077] Comparative Example 2:

[0078] 1) Using steel slag as raw material, the lumpy steel slag is initially ground to obtain coarse steel slag powder, and then ground again to obtain fine steel slag powder;

[0079] 2) Mix 25 parts by weight of steel slag powder and 1 part by weight of ammonium salt evenly to obtain mixture A;

[0080] 3) Place mixture A into a stirred ball mill with a ball-to-material ratio of 1:1. Grind for 10 minutes, then add a dispersant and continue grinding. Introduce flue gas from coal combustion at a rate of 5 L / min and react until the pH reaches 7-8 to obtain a carbon-fixing functional blend.

[0081] 4) Take carbon-fixing functional admixture, 40 parts by weight of cement, 30 parts by weight of fly ash, and 7 parts by weight of perlite particles, mix them evenly, and pour them into a round pot granulator.

[0082] 5) Start the granulator and then slowly spray water. After about 1 minute, you will see that the center of the rolling material has initially formed spherical particles. Adjust the nozzle slightly to slightly narrow the water flow. Spray water slowly at the edge of the rolling material to prepare carbon-fixing functional non-fired ceramsite.

[0083] Experimental example:

[0084] Arsenic adsorption rate determination: An arsenic-containing water sample with a concentration of 1 mol / L was prepared using As2O5. Before use, it was diluted stepwise with ultrapure water. In the adsorption experiment, the carbon-fixing functional non-fired ceramic particles were first accurately weighed into a polyethylene plastic bottle. Then, a 50 mL As(V) solution with a pH value adjusted beforehand and an arsenic concentration between 0.000001 and 1 mol / L was added to the polyethylene plastic bottle containing the carbon-fixing functional non-fired ceramic particles. The bottle was capped and shaken well, and placed at room temperature (23±1)℃ for 50 days (shaking by hand several times a day for about 2 minutes each time). After 50 days of adsorption reaction, the adsorption rate of arsenic by the carbon-fixing functional non-fired ceramic particles was determined by graphite furnace atomic absorption spectrometry.

[0085] Carbon fixation efficiency determination: The mineralization efficiency is calculated by measuring the weight loss of CaCO3 in raw materials and products through TG analysis. The definition of mineralization efficiency is: the ability of alkaline solid waste to fix CO2 is equal to the ratio of the mass of fixed CO2 to the mass of alkaline solid waste.

[0086] ;

[0087] m1 represents the mass of CO2 fixed after the mineralization reaction;

[0088] m2 represents the mass of alkaline solid waste.

[0089] Fineness modulus determination: The current national standard GB / T14684 "Construction Sand" uses the fractional sieve residue calculation method to express the fineness modulus, defining the fineness modulus as between 3.2 and 3.8 mm. The closer the fineness modulus is to 3.5 mm, the better the performance of the ceramsite.

[0090] M=(A2+A3+A4+A5+A6-5A1) / (100-A1);

[0091] M—Fineness Modulus;

[0092] A1 – The cumulative percentage of residue on a 4.75mm sieve;

[0093] A2 – The cumulative percentage of residue on a 2.36mm sieve;

[0094] A3 – The cumulative percentage of residue on a 1.18mm sieve;

[0095] A4 – The cumulative percentage of residue on a 0.6mm sieve;

[0096] A5 – The cumulative percentage of residue on a 0.3mm sieve;

[0097] A6 – The cumulative percentage of residue on a 0.15mm sieve.

[0098] Test data such as Figure 1 As shown, by Figure 1 It can be seen that Comparative Example 1 did not add ammonium salt for synergistic wet milling, and Comparative Example 2 did not undergo wet milling treatment. Compared with Example 1, it was found that the fineness modulus of ceramic particles, As adsorption efficiency and carbon fixation efficiency of Comparative Example 1 and Comparative Example 2 were much lower than those of Example 1, and the effect was not ideal.

[0099] Compared with Comparative Examples 1-2, Examples 1-6 significantly encapsulated CO2. The carbon-fixing functional admixture prepared from steel slag after carbonization, used as an auxiliary admixture, resulted in carbon-fixing functional non-fired ceramsite with an As adsorption efficiency of 90%-97%, a carbon fixation efficiency of 31.4%-42.1%, and a ceramsite fineness modulus of 3.2-3.8 mm. Among them, Example 3 exhibited the best overall performance.

[0100] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for functional utilization of coal-fired power plant flue gas capture, characterized by, Includes the following steps: 1) Using steel slag as raw material, the lumpy steel slag is initially ground to obtain coarse steel slag powder, and then ground again to obtain fine steel slag powder; 2) Mix 20-50 parts by weight of steel slag powder and 1-5 parts by weight of ammonium salt evenly to obtain a mixture. Add water and adjust the solid content to between 12.5% ​​and 33.3% to obtain mixed slurry A. 3) Put slurry A into a stirred ball mill, grind for 10 minutes, add dispersant, continue grinding, and introduce coal flue gas to obtain carbon-fixing functional admixture; 4) Take 20-40 parts by weight of carbon-fixing functional admixture, 40-80 parts by weight of cement, 30-55 parts by weight of fly ash, and 7-15 parts by weight of perlite particles, mix them evenly, and pour them into a round pot granulator. 5) Start the granulator and then slowly spray water. After 1 minute, you will see that the center of the rolling material has initially formed spherical particles. Adjust the nozzle slightly to slightly narrow the water flow. Spray water slowly with the nozzle aimed at the edge of the rolling material to prepare carbon-fixing functional non-fired ceramsite. The perlite particles have a maximum particle size of no more than 2.63 mm, and the fly ash has a particle size range of 0.5 to 300 μm. The rotation speed of the circular pot granulator is 10-50 r / min, and the elevation angle of the circular pot granulator is 20°-45°. The median particle size of the steel slag powder is 40-60 μm, and the CaO content in the steel slag powder is not less than 30% and the Fe2O3 content is not less than 15%. The solid content indicates the ratio of the mixture to water, and the ammonium salt is one of ammonium nitrate, ammonium chloride, ammonium acetate, and ammonium sulfate; The dispersant is one of sodium dodecylbenzenesulfonate, sodium hexametaphosphate, and polyethylene glycol. The carbon-fixing functional admixture has a pH of 7-8, a median particle size of 2-5 μm, and an Fe(OH)3 content of not less than 15%. The water spraying lasts for 0.5 to 2 seconds, with an interval of 5 to 10 seconds between each spraying, and each water spray lasts for 1 to 3 seconds with an interval of 7 to 15 seconds between each water spraying.

2. The method for functional utilization of flue gas traps from coal-fired power plants according to claim 1, characterized in that, The CO2 concentration of the introduced flue gas is not less than 12%, and the gas velocity is 5L / min to 12L / min.

3. The method for functional utilization of flue gas traps from coal-fired power plants according to claim 1, characterized in that, The stirring ball mill has a rotation speed of 300-900 r / min and a ball ratio of m(0.5-0.8mm):m(0.8-1.1mm):m(1.1-1.4mm) = (1-3):(1-3):

1.

4. The method for functional utilization of flue gas traps from coal-fired power plants according to claim 1, characterized in that, The fineness modulus of the ceramsite is between 3.2 and 3.8, and the bulk density is between 442.7 kg / m3 and 581.1 kg / m3.

Images