CN113526620A - Iron-carbon micro-electrolysis filler for wastewater treatment and preparation method thereof - Google Patents
Iron-carbon micro-electrolysis filler for wastewater treatment and preparation method thereof Download PDFInfo
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- CN113526620A CN113526620A CN202110727490.5A CN202110727490A CN113526620A CN 113526620 A CN113526620 A CN 113526620A CN 202110727490 A CN202110727490 A CN 202110727490A CN 113526620 A CN113526620 A CN 113526620A
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- iron
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- electrolysis filler
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- 239000000945 filler Substances 0.000 title claims abstract description 43
- 238000005868 electrolysis reaction Methods 0.000 title claims abstract description 41
- QMQXDJATSGGYDR-UHFFFAOYSA-N methylidyneiron Chemical compound [C].[Fe] QMQXDJATSGGYDR-UHFFFAOYSA-N 0.000 title claims abstract description 34
- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 29
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000000571 coke Substances 0.000 claims abstract description 22
- 239000000463 material Substances 0.000 claims abstract description 20
- 238000010438 heat treatment Methods 0.000 claims abstract description 18
- 238000010304 firing Methods 0.000 claims abstract description 15
- 239000010426 asphalt Substances 0.000 claims abstract description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 10
- 239000001301 oxygen Substances 0.000 claims abstract description 10
- 238000001816 cooling Methods 0.000 claims abstract description 9
- 239000002994 raw material Substances 0.000 claims abstract description 7
- 238000002156 mixing Methods 0.000 claims abstract description 6
- 238000003756 stirring Methods 0.000 claims abstract description 6
- 230000003213 activating effect Effects 0.000 claims abstract description 3
- 238000001035 drying Methods 0.000 claims abstract description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 10
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 10
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 238000004131 Bayer process Methods 0.000 claims description 5
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 claims description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 5
- 229910052681 coesite Inorganic materials 0.000 claims description 5
- 229910052593 corundum Inorganic materials 0.000 claims description 5
- 229910052906 cristobalite Inorganic materials 0.000 claims description 5
- 239000000377 silicon dioxide Substances 0.000 claims description 5
- 229910052682 stishovite Inorganic materials 0.000 claims description 5
- 229910052905 tridymite Inorganic materials 0.000 claims description 5
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 5
- 239000008187 granular material Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 5
- 239000002699 waste material Substances 0.000 abstract description 4
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 abstract description 2
- 238000003723 Smelting Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 22
- 239000002351 wastewater Substances 0.000 description 9
- 239000010842 industrial wastewater Substances 0.000 description 4
- 238000002955 isolation Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000005469 granulation Methods 0.000 description 3
- 230000003179 granulation Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- LDXJRKWFNNFDSA-UHFFFAOYSA-N 2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)-1-[4-[2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidin-5-yl]piperazin-1-yl]ethanone Chemical compound C1CN(CC2=NNN=C21)CC(=O)N3CCN(CC3)C4=CN=C(N=C4)NCC5=CC(=CC=C5)OC(F)(F)F LDXJRKWFNNFDSA-UHFFFAOYSA-N 0.000 description 2
- YLZOPXRUQYQQID-UHFFFAOYSA-N 3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)-1-[4-[2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidin-5-yl]piperazin-1-yl]propan-1-one Chemical compound N1N=NC=2CN(CCC=21)CCC(=O)N1CCN(CC1)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F YLZOPXRUQYQQID-UHFFFAOYSA-N 0.000 description 2
- AFCARXCZXQIEQB-UHFFFAOYSA-N N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CCNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 AFCARXCZXQIEQB-UHFFFAOYSA-N 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- OHVLMTFVQDZYHP-UHFFFAOYSA-N 1-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)-2-[4-[2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidin-5-yl]piperazin-1-yl]ethanone Chemical compound N1N=NC=2CN(CCC=21)C(CN1CCN(CC1)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)=O OHVLMTFVQDZYHP-UHFFFAOYSA-N 0.000 description 1
- 241000282414 Homo sapiens Species 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- -1 petrifaction Substances 0.000 description 1
- 230000008635 plant growth Effects 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The invention provides a preparation method of an iron-carbon micro-electrolysis filler for wastewater treatment, which comprises the following steps: 1) mixing and stirring the red mud, the crushed coke, the preheated asphalt and water uniformly, granulating and drying to obtain a prefabricated material; 2) heating the prefabricated material under the condition of isolating oxygen for firing, introducing water vapor into the system for activating after a period of time, and finally cooling to room temperature to obtain the iron-carbon micro-electrolysis filler. The method adopts the red mud which is generated in non-ferrous smelting and is difficult to treat and the broken coke generated in the production of the active coke as raw materials, uses waste to treat waste, realizes the cooperative treatment and resource utilization of the red mud and the broken coke, and the prepared iron-carbon micro-electrolysis filler has large specific surface area and high strength, provides larger current density for wastewater treatment, has good micro-electrolysis effect, runs stably for a long time, is difficult to passivate and harden, has simple preparation process, low investment, low operation cost, simple operation and the like.
Description
Technical Field
The invention belongs to the technical field of wastewater treatment, and particularly relates to an iron-carbon micro-electrolysis filler for wastewater treatment and a preparation method thereof.
Background
With the development of industry, a large amount of industrial wastewater is generated in the industrial production process, wherein the industrial wastewater from the industries of paper making, medicine, petrifaction, oil and gas exploitation and the like has the characteristics of complex components, high COD (chemical oxygen demand), high salt content, high toxic content and difficult degradation. If the industrial wastewater which is difficult to degrade is directly discharged without being treated, surface water, underground water, soil and cultivated land can be polluted, and the normal growth of plants and microorganisms is influenced, so that the health of human beings is influenced.
At present, industrial wastewater which is difficult to degrade becomes a great research hotspot and difficulty in the field of domestic and foreign water treatment. The micro-electrolysis technology is an ideal process for treating high-concentration organic wastewater difficult to degrade at present, and can utilize a micro-electrolysis material filled in the wastewater to generate a 1.2V potential difference to carry out electrolysis treatment on the wastewater under the condition of no power supply so as to achieve the purpose of degrading organic pollutants. However, after the micro-electrolysis filler is operated for a period of time, a passive film can be formed on the surface of the filler, and suspended particles in the wastewater can be partially deposited on the surface of the filler, so that the filler is prevented from effectively contacting the wastewater, and the iron bed treatment effect is reduced. Meanwhile, the filler is easy to harden after a period of time, which causes the flow state of the waste water in the micro-electrolysis reactor to deteriorate, reduces the treatment effect and greatly increases the difficulty of filler replacement.
Disclosure of Invention
The invention aims to provide a preparation method of an iron-carbon micro-electrolysis filler for wastewater treatment, which can solve at least part of defects in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
a preparation method of an iron-carbon micro-electrolysis filler for wastewater treatment comprises the following steps:
1) uniformly mixing and stirring the crushed and ground red mud and crushed coke with preheated asphalt and water, granulating and drying to obtain a prefabricated material;
2) heating the prefabricated material under the condition of isolating oxygen for firing, introducing water vapor into the system for activating after a period of time, and finally cooling to room temperature to obtain the iron-carbon micro-electrolysis filler.
Further, the mass ratio of the red mud, the crushed coke, the asphalt and the water in the step 1) is (55-65): (5-15): 1 (2-5).
Further, the red mud is Bayer process red mud, and comprises the following components in percentage by mass: 30-60% of iron grade TFe and Al2O3 10～45％、SiO2 5～15％、Na2O 1～10％、TiO2 1～10％。
Further, the grain size of the granules in the step 1) is 2-3 cm.
Further, the heating and firing process of the prefabricated material in the step 2) is as follows: preserving heat for 10-30 min at 250-350 ℃, then heating to 750-850 ℃, preserving heat for 30-60 min, then heating the system to 1050-1150 ℃, introducing steam, and preserving heat for 20-30 min at the temperature.
Further, the heating rate of the prefabricated material from 250-350 ℃ to 750-850 ℃ in the heating and firing process is 10-30 ℃/min, and the heating rate of the prefabricated material from 750-850 ℃ to 1050-1150 ℃ is 10-30 ℃/min.
Further, the mass ratio of the water vapor to the crushed coke in the step 2) is 1: (1-3).
In addition, the invention also provides the iron-carbon micro-electrolysis filler for wastewater treatment, which is prepared by the method and comprises the following raw materials in parts by weight: 55-65 parts of red mud, 5-15 parts of crushed coke, 1 part of asphalt and 2-5 parts of water.
Compared with the prior art, the invention has the beneficial effects that:
(1) the preparation method of the iron-carbon micro-electrolysis filler for wastewater treatment provided by the invention adopts the red mud which is generated in non-ferrous smelting and is difficult to treat and the crushed coke generated in the production of the active coke as raw materials, treats waste by waste, realizes the cooperative treatment and resource utilization of the red mud and the crushed coke, has large specific surface area and high strength, provides higher current density for wastewater treatment, has good micro-electrolysis effect, is stable in long-term operation, and is difficult to passivate and harden.
(2) The preparation method of the iron-carbon micro-electrolysis filler for wastewater treatment provided by the invention takes solid waste in industrial production as a raw material, and has the advantages of simple preparation process, low investment, low operation cost, simple operation and the like.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
the embodiment provides a preparation method of an iron-carbon micro-electrolysis filler for wastewater treatment, which comprises the following specific processes:
firstly, uniformly mixing and stirring red mud, crushed coke, preheated asphalt and water according to a mass ratio of 60:10:1:5, wherein the red mud is Bayer process red mud and comprises the following components in percentage by mass: 30-60% of iron grade TFe and Al2O3 10～45％、SiO2 5～15％、Na2O 1～10％、TiO2 1～10％。
Then, slowly pouring the mixture into a granulator for granulation, wherein the particle size is 2-3 cm; and placing the granulated filler in a well-ventilated area for airing for not less than 24 hours to obtain a prefabricated material.
And finally, preheating a tubular furnace used for firing from room temperature to 300 ℃, immediately placing the prefabricated material into the tubular furnace, keeping the temperature at 300 ℃ for 20min, raising the temperature to 800 ℃ at a heating rate of 25 ℃/min, keeping the temperature for 40min, raising the temperature to 1100 ℃ at a rate of 20 ℃/min, introducing water vapor, keeping the mass ratio of broken coke to water vapor at 1:1, keeping the temperature for 20min, carrying out the firing process under the condition of oxygen isolation, closing the water vapor, starting to cool, carrying out the cooling process under the condition of oxygen isolation, and obtaining a sample after cooling to room temperature, namely the final iron-carbon micro-electrolysis filler.
Example 2:
the embodiment provides a preparation method of an iron-carbon micro-electrolysis filler for wastewater treatment, which comprises the following specific processes:
firstly, uniformly mixing and stirring red mud, crushed coke, preheated asphalt and water according to a mass ratio of 55:15:1:2, wherein the red mud is Bayer process red mud and comprises the following components in percentage by mass: 30-60% of iron grade TFe and Al2O3 10～45％、SiO2 5～15％、Na2O 1～10％、TiO2 1～10％。
Then, slowly pouring the mixture into a granulator for granulation, wherein the particle size is 2-3 cm; and placing the granulated filler in a well-ventilated area for airing for not less than 24 hours to obtain a prefabricated material.
And finally, preheating a tubular furnace used for firing from room temperature to 250 ℃, immediately placing the prefabricated material into the tubular furnace, keeping the temperature at 250 ℃ for 30min, raising the temperature to 750 ℃ at a heating rate of 10 ℃/min and keeping the temperature for 60min, raising the temperature to 1050 ℃ at a heating rate of 10 ℃/min, introducing water vapor, keeping the mass ratio of broken coke to water vapor at 3:1, keeping the temperature for 30min, carrying out the firing process under the condition of isolating oxygen, closing the water vapor, starting to cool, carrying out the cooling process under the condition of isolating oxygen, and obtaining a sample after cooling to room temperature, namely the final iron-carbon micro-electrolysis filler.
Example 3:
the embodiment provides a preparation method of an iron-carbon micro-electrolysis filler for wastewater treatment, which comprises the following specific processes:
firstly, uniformly mixing and stirring red mud, crushed coke, preheated asphalt and water according to a mass ratio of 65:5:1:4, wherein the red mud is Bayer process red mud and comprises the following components in percentage by mass: 30-60% of iron grade TFe and Al2O3 10～45％、SiO2 5～15％、Na2O 1～10％、TiO2 1～10％。
Then, slowly pouring the mixture into a granulator for granulation, wherein the particle size is 2-3 cm; and placing the granulated filler in a well-ventilated area for airing for not less than 24 hours to obtain a prefabricated material.
And finally, preheating a tubular furnace used for firing to 350 ℃ from room temperature, immediately placing the prefabricated material into the tubular furnace, keeping the temperature at 350 ℃ for 10min, raising the temperature to 850 ℃ at a temperature rise rate of 30 ℃/min, keeping the temperature for 30min, raising the temperature to 1150 ℃ at a temperature rise rate of 30 ℃/min, introducing water vapor, keeping the mass ratio of broken coke to water vapor at 2:1, keeping the temperature for 20min, carrying out the firing process under the condition of oxygen isolation, closing the water vapor, starting to cool, carrying out the cooling process under the condition of oxygen isolation, and obtaining a sample after cooling to room temperature, namely the final iron-carbon micro-electrolysis filler.
Comparative example 1:
the comparative example provides a method for preparing an iron-carbon micro-electrolysis filler for wastewater treatment, which has the same specific process as the above example 1, except that: in the firing process of the comparative example, the preform was directly fired at 1100 ℃ without a step-wise temperature-raising process of holding at 300 ℃ for 20min, raising the temperature to 800 ℃ and then raising the temperature from 800 ℃ to 1100 ℃.
Comparative example 2:
the comparative example provides a method for preparing an iron-carbon micro-electrolysis filler for wastewater treatment, which has the same specific process as the above example 1, except that: in this comparative example, the activation treatment process was not carried out by introducing water vapor into the system during the firing process.
Comparative example 3:
the comparative example provides a method for preparing an iron-carbon micro-electrolysis filler for wastewater treatment, which has the same specific process as the above example 1, except that: in the preparation process of the prefabricated material, the raw material of the comparative example does not comprise red mud.
Comparative example 4:
the comparative example provides a method for preparing an iron-carbon micro-electrolysis filler for wastewater treatment, which has the same specific process as the above example 1, except that: in the preparation process of the preform, the raw material of this comparative example does not include crushed coke.
The performance of the iron-carbon micro-electrolysis fillers for wastewater treatment prepared in the above examples 1 to 3 and comparative examples 1 to 4 was measured, and the results are shown in table 1.
Table 1:
| specific gravity (t/m)3) | Specific surface area (m)2/g) | Void ratio (%) | Physical Strength (kg/cm)2) | |
| Practice ofExample 1 | 1.325 | 1.45 | 75 | 856 |
| Example 2 | 1.323 | 1.40 | 70 | 823 |
| Example 3 | 1.322 | 1.42 | 72 | 842 |
| Comparative example 1 | 1.324 | 1.14 | 31 | 968 |
| Comparative example 2 | 1.321 | 1.25 | 52 | 913 |
| Comparative example 3 | 0.606 | 1.21 | 73 | 578 |
| Comparative example 4 | 1.784 | 0.98 | 48 | 896 |
The iron-carbon micro-electrolysis filler for wastewater treatment prepared in the above examples 1 to 3 and comparative examples 1 to 4 was used to treat certain industrial coking wastewater, the COD of the wastewater was 9000 mg/L, the chroma was 1650 times, the pH of the wastewater was adjusted to 3 to 4, and the treatment results are shown in Table 2 under the condition that the hydraulic retention time was 2 hours, and the iron-carbon micro-electrolysis filler of the present invention was continuously used for treatment for 1 month, the treatment effect was stable, and no hardening phenomenon occurred.
Table 2:
| reaction time (h) | Chroma removal ratio (%) | COD removal Rate (%) | |
| Example 1 | 2 | 99.5 | 60 |
| Example 2 | 2 | 98.9 | 55 |
| Example 3 | 2 | 98.5 | 57 |
| Comparative example 1 | 2 | 78.8 | 25 |
| Comparative example 2 | 2 | 80.6 | 34 |
| Comparative example 3 | 2 | 16.4 | 24 |
| Comparative example 4 | 2 | 6.5 | 7 |
The above examples are merely illustrative of the present invention and should not be construed as limiting the scope of the invention, which is intended to be covered by the claims and any design similar or equivalent to the scope of the invention.
Claims (8)
1. A preparation method of an iron-carbon micro-electrolysis filler for wastewater treatment is characterized by comprising the following steps:
1) uniformly mixing and stirring the crushed and ground red mud and crushed coke with preheated asphalt and water, granulating and drying to obtain a prefabricated material;
2) heating the prefabricated material under the condition of isolating oxygen for firing, introducing water vapor into the system for activating after a period of time, and finally cooling to room temperature to obtain the iron-carbon micro-electrolysis filler.
2. The method for preparing the iron-carbon micro-electrolysis filler for wastewater treatment according to claim 1, wherein the mass ratio of the red mud, the crushed coke, the asphalt and the water in the step 1) is (55-65): (5-15): 1 (2-5).
3. The method for preparing the iron-carbon micro-electrolysis filler for wastewater treatment according to claim 1, wherein the red mud is Bayer process red mud, and comprises the following components in percentage by mass: 30-60% of iron grade TFe and Al2O3 10～45％、SiO2 5～15％、Na2O 1～10％、TiO2 1～10％。
4. The method for preparing the iron-carbon micro-electrolysis filler for wastewater treatment according to claim 1, wherein the grain size of the granules in the step 1) is 2-3 cm.
5. The method for preparing the iron-carbon micro-electrolysis filler for wastewater treatment according to claim 1, wherein the heating and firing process of the prefabricated material in the step 2) is as follows: preserving heat for 10-30 min at 250-350 ℃, then heating to 750-850 ℃, preserving heat for 30-60 min, then heating the system to 1050-1150 ℃, introducing steam, and preserving heat for 20-30 min at the temperature.
6. The method for preparing the iron-carbon micro-electrolysis filler for wastewater treatment according to claim 5, wherein the heating rate of the prefabricated material from 250-350 ℃ to 750-850 ℃ in the heating and firing process is 10-30 ℃/min, and the heating rate of the prefabricated material from 750-850 ℃ to 1050-1150 ℃ is 10-30 ℃/min.
7. The method for preparing the iron-carbon micro-electrolysis filler for wastewater treatment according to claim 1, wherein the mass ratio of the water vapor to the crushed coke in the step 2) is 1: (1-3).
8. The iron-carbon micro-electrolysis filler for wastewater treatment prepared by the method of any one of claims 1 to 7 is characterized by comprising the following raw materials in parts by weight: 55-65 parts of red mud, 5-15 parts of crushed coke, 1 part of asphalt and 2-5 parts of water.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113104939A (en) * | 2021-04-15 | 2021-07-13 | 北京科技大学 | Method for preparing micro-electrolysis active coke filler by using metallurgical dust and mud |
| CN115124115A (en) * | 2022-06-20 | 2022-09-30 | 渤瑞环保股份有限公司 | Iron-carbon material for recycling residual asphalt and preparation method and application thereof |
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