Multi-source solid waste porous ceramsite for treating phenol-containing wastewater and preparation method thereof

Abstract

The application provides a multi-source solid waste porous ceramsite for treating phenol-containing wastewater and a preparation method thereof, and belongs to the technical fields of solid waste resource utilization and wastewater treatment. The preparation method of the porous ceramsite is as follows: S1, drying and sieving iron tailings, vanadium extraction slag and fly ash respectively; S2, grinding the iron tailings, vanadium extraction slag, fly ash, quicklime, glass powder and ammonium bicarbonate to make them uniformly mixed; S3, adding deionized water, uniformly mixing and then pressing into spherical green balls, and then putting the green balls into a microwave oven for low-temperature foaming; S4, transferring the foamed balls into a muffle furnace for sintering, cooling to room temperature after heat preservation, and then obtaining the multi-source solid waste porous ceramsite. The preparation method is simple, the cost is low, a plurality of solid waste resources can be simultaneously treated, the prepared porous ceramsite material is easy to recycle, is not prone to agglomeration, has a high phenol-containing wastewater degradation rate, and has great practical significance and market competitiveness.

Description

Technical Field

[0001] This invention relates to the fields of solid waste resource utilization and wastewater treatment technology, and in particular to a porous ceramsite for treating phenol-containing wastewater and its preparation method. Background Technology

[0002] With the development of the steel industry, the scale of coking operations has continuously expanded, resulting in a significant increase in the discharge of coking wastewater, causing serious environmental problems. Pollutants in coking wastewater generally consist of ammonia nitrogen, cyanide, sulfides, thiocyanate, phenolic compounds, polycyclic aromatic compounds, and heterocyclic organic compounds containing nitrogen, oxygen, and sulfur. Overall, it is characterized by high concentrations of ammonia nitrogen, phenols, and oil, and a high content of toxic and inhibitory substances. Complete degradation of organic pollutants is difficult to achieve during biological treatment, posing a serious threat to the environment. It is a typical high-concentration, highly polluting, toxic, and difficult-to-degrade industrial organic wastewater. Despite decades of scientific research, no breakthrough research results or significant progress in the application technology of deep treatment of coking wastewater have been achieved globally.

[0003] Coking wastewater is generally treated using a three-stage wastewater treatment process. The first stage is pretreatment, which removes phenols and cyanides from high-concentration phenol- and cyanide-containing wastewater. The second stage mainly refers to the harmless treatment of phenol and cyanide wastewater, primarily using the activated sludge process. The third stage is advanced treatment, which is used to further purify the water when the biochemically treated water still fails to meet the discharge standards, ensuring that it meets the discharge requirements.

[0004] Currently, the main methods for advanced treatment of coking wastewater both domestically and internationally include biofilm methods, biochemical methods, coagulation methods, and adsorption methods. Among these, biofilm methods offer advantages such as simple process, convenient operation, small footprint, and excellent effluent quality after advanced treatment. However, the high investment cost due to membrane fouling, membrane degradation, concentration polarization, and expensive membrane modules cannot be ignored. Biochemical methods offer advantages such as low investment cost, low operating costs, and no secondary pollution. However, conventional activated sludge processes have low removal rates for recalcitrant compounds, resulting in high COD, ammonia nitrogen, and color in the effluent, failing to meet discharge standards. Coagulation methods offer advantages such as simple operation, low cost, and convenient management. However, they can only remove suspended solids and a small amount of dissolved substances from wastewater, and cannot comprehensively degrade or remove organic matter from coking wastewater. Adsorption methods are widely used in the advanced treatment of coking wastewater due to their good treatment effect and simplicity. Although adsorption methods can rapidly treat organic pollutants on a large scale, they cannot solve the problem of secondary pollution. If the desorption post-treatment process is included, not only will the cost be higher, but the problem of organic matter degradation will still exist.

[0005] In coking wastewater adsorption materials, porous ceramsite prepared using solid waste resources as a matrix has attracted widespread attention due to its advantages such as low cost, high stability, acid and alkali resistance, simple synthesis process, and ability to absorb various solid waste resources. It is particularly suitable for adsorbing phosphorus- and Cu-containing wastewater. 2+ While achieving good adsorption effects in wastewater, there are few reports of its application in phenol wastewater. On the other hand, the metallurgical processes of vanadium-titanium and steel production generate large amounts of solid waste, such as iron tailings and vanadium extraction slag, which, if not properly treated, will damage the ecological environment. Vanadium extraction slag and iron tailings are major solid wastes from metallurgical processes, with unique compositions, difficult to dispose of using traditional technologies, large historical accumulations, low utilization rates, and significant ecological and environmental pressure. Summary of the Invention

[0006] To address the aforementioned problems in existing technologies, this invention provides a porous ceramsite material for treating phenol-containing wastewater from multiple solid waste sources, along with its preparation method. The preparation method of this invention is simple, low-cost, and can simultaneously utilize multiple solid waste resources. The resulting porous ceramsite material is easy to recycle, does not easily agglomerate, and exhibits a high degradation rate for phenol-containing wastewater, thus possessing significant practical value and market competitiveness.

[0007] The technical solution of the present invention is as follows:

[0008] A porous ceramsite for treating phenol-containing wastewater from multiple sources, the method for preparing the porous ceramsite includes the following steps:

[0009] S1. Dry and sieve the iron tailings, vanadium extraction slag and fly ash respectively;

[0010] S2. Grind the iron tailings, vanadium extraction slag, fly ash, quicklime, glass powder and ammonium bicarbonate to make them evenly mixed;

[0011] S3. Add deionized water, mix well, press into spherical shape to obtain raw material balls, and put them into a microwave oven for low-temperature foaming.

[0012] S4. The foamed pellets are transferred to a muffle furnace for sintering. After heat preservation, they are cooled to room temperature with the furnace to obtain the multi-source solid waste porous ceramsite.

[0013] The ammonium bicarbonate is used as a pore-forming agent; glass powder can improve the hardness and strength of porous ceramsite; quicklime can lower the sintering temperature and also improve hardness and strength.

[0014] Preferably, in step S1, the drying temperature is 100-120℃ and the drying time is 1-3h; the sieving is done through a 120-150 mesh standard sieve.

[0015] Preferably, in step S2, the mass percentages of iron tailings, vanadium extraction slag, and fly ash are x, y, and z, respectively, where z = 0.2, 0.5 ≤ x ≤ 0.7, 0.1 ≤ y ≤ 0.3, and x + y + z = 1.

[0016] Preferably, in step S2, the sum of the masses of iron tailings, vanadium extraction slag, and fly ash is set as M, then the mass of quicklime is 0.06-0.08M, the mass of glass powder is 0.02-0.04M, and the mass of ammonium bicarbonate is 0.20-0.24M.

[0017] Preferably, in step S3, the mass of the deionized water is 0.20-0.40M, and the particle size of the raw material balls is 9-11mm.

[0018] Preferably, in step S3, the low-temperature foaming time of the microwave oven is 1-3 minutes; the low temperature range is 40-60℃.

[0019] Preferably, in step S4, the sintering temperature is 1060-1140℃, the heating rate is 5-20℃ / min, and the holding time is 60-90min.

[0020] Preferably, in step S4, the crystal phase composition of the obtained porous ceramic particles is quartz SiO2, ilmenite FeTiO3, and pyroxene (Ca,Na)(Mg,Fe,Al,Ti)(Si,Al)2O6.

[0021] The present invention also provides the application of the porous ceramsite for the chemical adsorption of phenol in wastewater.

[0022] Furthermore, the porous ceramic particles are placed in wastewater containing phenol, protected from light, and shaken at room temperature for 0.5-1.0 hours, followed by standing for 24-48 hours to adsorb and degrade the phenol.

[0023] Furthermore, the concentration of phenol is 10-20 mg / L, but is not limited to this range;

[0024] Furthermore, the amount of the porous ceramsite used ranges from 1 to 3 g / L, but is not limited to this range.

[0025] The beneficial technical effects of this invention are as follows:

[0026] 1. This invention uses iron tailings, vanadium extraction slag, and fly ash as main raw materials, and synthesizes porous ceramsite materials from multiple solid waste sources (iron tailings / vanadium extraction slag / fly ash) using a pore-forming agent-assisted thermal polymerization process. The preparation process does not require gas protection, achieving effective adsorption of phenol wastewater. The raw materials used in this invention are common solid waste resources in metallurgical processes, widely available, and virtually cost-free.

[0027] 2. This invention simplifies the preparation method by adjusting the proportion of raw materials and scientifically combining them. It can take into account both the performance of porous ceramic adsorbent materials and ensure that the price of porous ceramic adsorbent materials is low. It is a porous ceramic adsorbent material with good comprehensive performance and market potential.

[0028] 3. Under normal temperature conditions, the present invention does not require adjustment of the pH value of phenol-containing wastewater. The prepared porous ceramic adsorbent material can be directly dispersed in phenol-containing wastewater for adsorption and degradation. There are currently no relevant reports. Its adsorption and degradation rate for phenol-containing wastewater is 35.07%-88.05%. Attached Figure Description

[0029] Figure 1 This is a map showing the proportioning of porous ceramsite raw materials based on iron tailings, fly ash, and vanadium extraction waste.

[0030] Figure 2 The XRD pattern of the porous ceramsite adsorbent material in Example 1 is shown when the sintering temperature is 1060℃, the holding time is 75min, and the raw material ratio of iron tailings / vanadium extraction slag / fly ash is 7:1:2.

[0031] Figure 3 The FTIR spectra of porous ceramic particles containing multi-source solid waste before and after adsorption are obtained when the sintering temperature is 1060℃, the holding time is 60min, and the raw material ratio of iron tailings / vanadium extraction slag / fly ash is 6:2:2.

[0032] Figure 4 The images shown are SEM images of porous ceramsite adsorbent material at different magnifications when the sintering temperature is 1140℃, the holding time is 60 min, and the raw material ratio of iron tailings / vanadium extraction slag / fly ash is 6:2:2 in Example 4. (a) 1000x; (b) 500x; (c) 200x; (d) 100x. Detailed Implementation

[0033] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0034] The main chemical components (mass percentage w) of the iron tailings, fly ash, and vanadium extraction waste used in the examples t The percentages are shown in Table 1. All other raw materials were commercially available and were chemically pure.

[0035] Table 1

[0036] Iron tailings 80.6 5.504 0.164 6.114 0.0762 2.835 1.943 0.954 Vanadium extraction waste 18.81 3.31 9.76 48.48 5.599 2.68 1.967 0 fly ash 47.75 31.42 1.36 7.402 0.0542 1.65 5.321 1.43

[0037] The raw material composition of porous ceramsite directly affects its performance. The composition of iron tailings, vanadium extraction waste, and fly ash significantly influences the physical, chemical, and mineral phase properties of porous ceramsite. The raw material composition of porous ceramsite contains SiO2, Al2O3, Fe2O3, CaO, MgO, TiO2, etc., with SiO2 and Al2O3 being the main components, and the other alkaline oxides serving as solvents. Let the mass percentage of iron tailings be x, vanadium extraction waste be y, and fly ash be z, where x, y, and z are all greater than 0 and less than 1, and x + y + z = 1. Based on the Riley phase diagram, the following formula can be obtained for composition design:

[0038] 0.53≤0.806x+0.1881y+0.4775z≤0.79 (1)

[0039] 0.1≤0.055x+0.0331y+0.3142z≤0.25 (2)

[0040] 0.08≤0.1367x+0.775y+0.172z≤0.24 (3)

[0041] Substituting z = 1 - xy into (1), (2), and (3) respectively, we get:

[0042] 0.0525≤0.3285x-0.2894y≤0.3125 (4)

[0043] -0.2142≤-0.2592x-0.2811y≤-0.0642 (5)

[0044] -0.092≤-0.0353x+0.603y≤0.068 (6)

[0045] From formulas (4), (5), and (6), a zoning diagram of porous ceramsite raw material proportions can be obtained, as shown below. Figure 1 As shown in the figure, the overlapping area indicates the optimal ratio of porous ceramsite raw materials. Through calculation and reasonable selection, by fixing z = 0.2, then 0.5 ≤ x ≤ 0.7 and 0.1 ≤ y ≤ 0.3. When the values ​​of the three raw materials are different, different types of porous ceramsite can be obtained, and their specific compositions are shown in Table 2.

[0046] Table 2

[0047]

[0048]

[0049] The performance testing methods used in the embodiments are as follows:

[0050] 1. X-ray fluorescence spectrometer: Chemical composition analysis was performed on an S8-TIGER type X-ray fluorescence spectrometer to determine the main chemical components of iron tailings, fly ash and vanadium extraction waste.

[0051] 2. Crystal phase analysis: XRD analysis was performed using a DX-2500X X-Ray diffractometer to determine the crystal phase composition of the porous ceramic adsorbent material for multi-source solid waste.

[0052] 3. Morphology analysis: The morphology of the porous ceramic adsorbent material for multi-source solid waste was analyzed using a SUPRA 55SAPPHI RE scanning electron microscope.

[0053] 4. Absorbance determination of phenol-containing wastewater: The absorbance of the phenol solution was determined using a TU-1901 double-beam UV-Vis spectrophotometer.

[0054] 5. Calculation of phenol-containing solution degradation rate: Let A0 be the initial absorbance of the phenol solution, and A be the absorbance of the phenol solution at time t. Then, the formula for calculating the phenol solution degradation rate η is:

[0055]

[0056] Example 1:

[0057] This embodiment provides a method for preparing and applying porous ceramsite for treating phenol-containing wastewater from multiple sources, including the following steps:

[0058] S1. Take an appropriate amount of iron tailings, vanadium extraction slag and fly ash and place them in an electric constant temperature drying oven and dry them at 100℃ for 1 hour. After cooling to room temperature, place the iron tailings, vanadium extraction slag and fly ash on an electric vibrating screen and pass them through a 120-mesh standard sieve.

[0059] S2. Let the total mass of iron tailings, vanadium extraction slag, and fly ash be M grams. Weigh out 0.7M grams of iron tailings, 0.1M grams of vanadium extraction slag, and 0.2M grams of fly ash to make the raw material ratio of iron tailings:vanadium extraction slag:fly ash 7:1:2. Then add 0.06M grams of quicklime, 0.02M grams of glass powder, and 0.20M grams of ammonium bicarbonate, transfer them to a mortar and grind them until they are evenly mixed.

[0060] S3. Add 0.20M deionized water, mix well, press into spherical shape to obtain raw material balls with a corresponding particle size of 9mm, put in microwave oven, low temperature 40℃, foam for 1min.

[0061] S4. Transfer the foamed pellets to a muffle furnace, sinter at 1060℃, at a heating rate of 5℃ / min, hold for 75 minutes and then cool to room temperature with the furnace to obtain porous ceramsite from multi-source solid waste.

[0062] S5. Place 1 g / L of porous ceramic adsorbent material into a 10 mg / L phenol solution, protect from light, and shake in a constant temperature water bath shaker for 0.5 h at room temperature, then let stand for 24 h to carry out adsorption and degradation.

[0063] Test results:

[0064] The XRD pattern of the porous ceramic particles prepared in this embodiment is as follows: Figure 2 As shown in the figure, the multi-source solid waste porous ceramic adsorbent material prepared after high-temperature sintering is mainly composed of quartz SiO2, containing a small amount of ilmenite FeTiO3 and pyroxene phases (Ca,Na)(Mg,Fe,Al,Ti)(Si,Al)2O6. Based on the absorbance change detected and calculated using the formula, the phenol degradation rate is 35.07%.

[0065] Example 2:

[0066] This embodiment provides a method for preparing and applying porous ceramsite for treating phenol-containing wastewater from multiple sources, including the following steps:

[0067] S1. Take an appropriate amount of iron tailings, vanadium extraction slag and fly ash and place them in an electric constant temperature drying oven and dry them at 105℃ for 2 hours. After cooling to room temperature, place the iron tailings, vanadium extraction slag and fly ash on an electric vibrating screen and pass them through a 130-mesh standard sieve.

[0068] S2. Let the total mass of iron tailings, vanadium extraction slag, and fly ash be M grams. Weigh out 0.6M grams of iron tailings, 0.2M grams of vanadium extraction slag, and 0.2M grams of fly ash to make the raw material ratio of iron tailings:vanadium extraction slag:fly ash 6:2:2. Then add 0.07M grams of quicklime, 0.03M grams of glass powder, and 0.22M grams of ammonium bicarbonate, transfer them to a mortar and grind them until they are evenly mixed.

[0069] S3. Add 0.3M deionized water, mix well, press into spherical shape to obtain raw material balls with a corresponding particle size of 10mm, put in microwave oven, low temperature 50℃, foam for 2 minutes.

[0070] S4. Transfer the foamed pellets to a muffle furnace, sinter at 1060℃, at a heating rate of 10℃ / min, hold for 60 minutes and then cool to room temperature with the furnace to obtain porous ceramsite from multi-source solid waste.

[0071] S5. Place 2 g / L of porous ceramic adsorbent material into a 15 mg / L phenol solution, protect from light, and shake in a constant temperature water bath shaker for 0.75 h at room temperature, then let stand for 48 h to carry out adsorption and degradation.

[0072] Test results:

[0073] The FTIR spectra of the porous ceramsite for multi-source solid waste prepared in this embodiment before and after adsorption are as follows: Figure 3 As shown in the figure, at approximately 778cm -1 Si-O tensile vibration peaks were observed at 1000-1300 cm⁻¹. -1 Tensile vibration peaks of CO were observed at 1600-1634 cm⁻¹. -1 The HOH bending vibration mode was observed at [location missing], which may be due to the adsorption of water molecules by porous ceramic particles in phenol solution. The CH stretching vibration peak is at 2700-3000 cm⁻¹. -1 Around 2300-2380cm -1 The appearance of antisymmetric stretching at O=C=O may be due to the adsorption of CO2.

[0074] from Figure 3 As can be seen, after the adsorption reaction with phenol, no characteristic peaks belonging to the benzene ring appeared in the infrared spectrum of the porous ceramsite (the C=O group in the benzene ring at 1660 cm⁻¹). -1 (Stretching left and right) indicates that the decrease in phenol concentration is not due to physical adsorption, but rather chemisorption. The absorption peak of the -OH bond in the porous ceramic particles shows a low-frequency shift and a lower peak position, indicating that hydrogen bonds participate in the adsorption process of phenol in the porous ceramic particles; while the CH bonds in the porous ceramic particles shift or even disappear. This may be because the benzene ring in the phenol molecule and the benzene ring in the porous ceramic particles adsorb pollutants onto the porous ceramic particles through π-π interactions.

[0075] The multi-source solid waste porous ceramic material prepared in this embodiment has a crystal phase composition of SiO2 (quartz), FeTiO3 (ilmenite), and (Ca,Na)(Mg,Fe,Al,Ti)(Si,Al)2O6 (pyroxene). Based on the absorbance change and calculation using the formula, the phenol degradation rate is 88.05%.

[0076] Example 3:

[0077] This embodiment provides a method for preparing and applying porous ceramsite for treating phenol-containing wastewater from multiple sources, including the following steps:

[0078] S1. Take an appropriate amount of iron tailings, vanadium extraction slag and fly ash and place them in an electric constant temperature drying oven and dry them at 110℃ for 3 hours. After cooling to room temperature, place the iron tailings, vanadium extraction slag and fly ash on an electric vibrating screen and pass them through a 140-mesh standard sieve.

[0079] S2. Let the total mass of iron tailings, vanadium extraction slag, and fly ash be M grams. Weigh out 0.5M grams of iron tailings, 0.3M grams of vanadium extraction slag, and 0.2M grams of fly ash to make the raw material ratio of iron tailings:vanadium extraction slag:fly ash 5:3:2. Then add 0.08M grams of quicklime, 0.04M grams of glass powder, and 0.24M grams of ammonium bicarbonate, transfer them to a mortar and grind them until they are evenly mixed.

[0080] S3. Add 0.40M deionized water, mix well, press into spherical shape to obtain raw material balls with a corresponding particle size of 11mm, put in microwave oven, low temperature 60℃, foam for 3 minutes.

[0081] S4. Transfer the foamed pellets to a muffle furnace, sinter at 1100℃, at a heating rate of 15℃ / min, hold for 90 minutes and then cool to room temperature with the furnace to obtain porous ceramsite from multi-source solid waste.

[0082] S5. Place 3 g / L of porous ceramic adsorbent material into a 20 mg / L phenol solution, protect from light, and shake in a constant temperature water bath shaker for 1 hour under normal temperature conditions, then let stand for 36 hours to carry out adsorption and degradation.

[0083] Test results:

[0084] The porous ceramic ceramsite material prepared in this embodiment has the following crystal phase composition: SiO2 (quartz), FeTiO3 (ilmenite), and (Ca,Na)(Mg,Fe,Al,Ti)(Si,Al)2O6 (pyroxene). Based on the absorbance change and calculation using the formula, the phenol degradation rate is 39.06%.

[0085] Example 4:

[0086] This embodiment provides a method for preparing and applying porous ceramsite for treating phenol-containing wastewater from multiple sources, including the following steps:

[0087] S1. Take an appropriate amount of iron tailings, vanadium extraction slag and fly ash and place them in an electric constant temperature drying oven and dry them at 120℃ for 2 hours. After cooling to room temperature, place the iron tailings, vanadium extraction slag and fly ash on an electric vibrating screen and pass them through a 150-mesh standard sieve.

[0088] S2. Let the total mass of iron tailings, vanadium extraction slag, and fly ash be M grams. Weigh out 0.6M grams of iron tailings, 0.2M grams of vanadium extraction slag, and 0.2M grams of fly ash to make the raw material ratio of iron tailings:vanadium extraction slag:fly ash 6:2:2. Then add 0.07M grams of quicklime, 0.03M grams of glass powder, and 0.22M grams of ammonium bicarbonate, transfer them to a mortar and grind them until they are evenly mixed.

[0089] S3. Add 0.3M deionized water, mix well, press into spherical shape to obtain raw material balls with a particle size of 10mm, put in microwave oven, low temperature 50℃, foam for 2 minutes.

[0090] S4. Transfer the foamed pellets to a muffle furnace, sinter at 1140℃, at a heating rate of 20℃ / min, hold for 60 minutes and then cool to room temperature with the furnace to obtain porous ceramsite from multi-source solid waste.

[0091] S5. Place 3 g / L of porous ceramic adsorbent material into a 15 mg / L phenol solution, protect from light, and shake in a constant temperature water bath shaker for 1 hour under normal temperature conditions, then let stand for 36 hours to carry out adsorption and degradation.

[0092] Test results:

[0093] SEM images of the porous ceramic particles prepared in this embodiment are shown below. Figure 4 As shown in the figure, it can be clearly seen from different magnifications that the porous ceramsite has a large number of pore structures, mainly circular pores, and the surface is uneven, which makes it easy for pollutants to be adsorbed.

[0094] The multi-source solid waste porous ceramic material prepared in this embodiment has a crystal phase composition of SiO2 (quartz), FeTiO3 (ilmenite), and (Ca,Na)(Mg,Fe,Al,Ti)(Si,Al)2O6 (pyroxene). Based on the absorbance change and calculation using the formula, the phenol degradation rate is 41.70%.

[0095] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, and for those of ordinary skill in the art, various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. Therefore, the present invention is not limited to the specific details without departing from the general concept defined by the claims and their equivalents.

Claims

1. An application of porous ceramsite for multi-source solid waste, characterized in that, This method is used to treat phenol-containing wastewater by chemically adsorbing phenol from the wastewater. The amount of porous ceramic granules used is 2 g / L, and the concentration of phenol in the wastewater is 15 mg / L. The porous ceramic granules are placed in the phenol-containing wastewater, protected from light, and shaken in a constant temperature water bath shaker for 0.75 h at room temperature, followed by standing for 48 h to adsorb and degrade the phenol. The phenol degradation rate is 88.05%. The method for preparing the porous ceramsite includes the following steps: S1. Take iron tailings, vanadium extraction slag and fly ash and place them in an electric constant temperature drying oven and dry them at 105℃ for 2 hours. After cooling to room temperature, put the iron tailings, vanadium extraction slag and fly ash on an electric vibrating screen and pass them through a 130-mesh standard sieve. S2. Let the total mass of iron tailings, vanadium extraction slag, and fly ash be M grams. Weigh out 0.6M grams of iron tailings, 0.2M grams of vanadium extraction slag, and 0.2M grams of fly ash to make the raw material ratio of iron tailings:vanadium extraction slag:fly ash 6:2:

2. Then add 0.07M grams of quicklime, 0.03M grams of glass powder, and 0.22M grams of ammonium bicarbonate, transfer them to a mortar and grind them until they are evenly mixed. S3. Add 0.3M deionized water to it, mix well, press it into a spherical shape to obtain raw material balls with a corresponding particle size of 10mm, put them in a microwave oven, and foam them at a low temperature of 50℃ for 2 minutes. S4. Transfer the foamed pellets to a muffle furnace, sinter at 1060℃, at a heating rate of 10℃ / min, hold for 60 minutes and then cool to room temperature with the furnace to obtain porous ceramsite from multi-source solid waste.

2. The application according to claim 1, characterized in that, In step S4, the crystal phase composition of the obtained porous ceramic particles is quartz SiO2, ilmenite FeTiO3, and pyroxene (Ca,Na)(Mg,Fe,Al,Ti)(Si, Al)2O6.

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