CN115213207A - Utilization method for harmless treatment of fly ash - Google Patents
Utilization method for harmless treatment of fly ash Download PDFInfo
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- CN115213207A CN115213207A CN202210791482.1A CN202210791482A CN115213207A CN 115213207 A CN115213207 A CN 115213207A CN 202210791482 A CN202210791482 A CN 202210791482A CN 115213207 A CN115213207 A CN 115213207A
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- fly ash
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- 239000010881 fly ash Substances 0.000 title claims abstract description 100
- 238000000034 method Methods 0.000 title claims abstract description 24
- 229910001385 heavy metal Inorganic materials 0.000 claims abstract description 57
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000003546 flue gas Substances 0.000 claims abstract description 23
- 238000002844 melting Methods 0.000 claims abstract description 22
- 230000008018 melting Effects 0.000 claims abstract description 22
- 150000002500 ions Chemical class 0.000 claims abstract description 20
- 241000605272 Acidithiobacillus thiooxidans Species 0.000 claims abstract description 14
- 239000002253 acid Substances 0.000 claims abstract description 14
- 239000011521 glass Substances 0.000 claims abstract description 13
- 238000002156 mixing Methods 0.000 claims abstract description 13
- 239000000203 mixture Substances 0.000 claims abstract description 11
- 239000000843 powder Substances 0.000 claims abstract description 9
- 239000012716 precipitator Substances 0.000 claims abstract description 5
- 238000010438 heat treatment Methods 0.000 claims abstract description 4
- 239000000243 solution Substances 0.000 claims description 13
- 238000005245 sintering Methods 0.000 claims description 8
- ZORQXIQZAOLNGE-UHFFFAOYSA-N 1,1-difluorocyclohexane Chemical compound FC1(F)CCCCC1 ZORQXIQZAOLNGE-UHFFFAOYSA-N 0.000 claims description 6
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 6
- 239000000292 calcium oxide Substances 0.000 claims description 6
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 6
- 239000004927 clay Substances 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 6
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 6
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 6
- 150000005837 radical ions Chemical class 0.000 claims description 6
- 229940035049 sorbitan monooleate Drugs 0.000 claims description 6
- 235000011069 sorbitan monooleate Nutrition 0.000 claims description 6
- 239000001593 sorbitan monooleate Substances 0.000 claims description 6
- 239000003929 acidic solution Substances 0.000 claims description 5
- 229920000642 polymer Polymers 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 229920003176 water-insoluble polymer Polymers 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 4
- 239000012190 activator Substances 0.000 claims description 3
- 239000000706 filtrate Substances 0.000 claims description 3
- 239000000047 product Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000007873 sieving Methods 0.000 claims description 2
- 239000007787 solid Substances 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 229910021645 metal ion Inorganic materials 0.000 abstract description 3
- 230000002378 acidificating effect Effects 0.000 abstract description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 239000004568 cement Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000002893 slag Substances 0.000 description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- 235000011941 Tilia x europaea Nutrition 0.000 description 3
- 239000013543 active substance Substances 0.000 description 3
- 238000004090 dissolution Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 239000004571 lime Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 230000020477 pH reduction Effects 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 241000605118 Thiobacillus Species 0.000 description 2
- 239000010426 asphalt Substances 0.000 description 2
- 239000011449 brick Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- 238000002309 gasification Methods 0.000 description 2
- 229910052745 lead Inorganic materials 0.000 description 2
- 229920002521 macromolecule Polymers 0.000 description 2
- 238000010309 melting process Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000005979 thermal decomposition reaction Methods 0.000 description 2
- 238000004056 waste incineration Methods 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000010791 domestic waste Substances 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/60—Biochemical treatment, e.g. by using enzymes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/30—Destroying solid waste or transforming solid waste into something useful or harmless involving mechanical treatment
- B09B3/38—Stirring or kneading
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/40—Destroying solid waste or transforming solid waste into something useful or harmless involving thermal treatment, e.g. evaporation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B2101/00—Type of solid waste
- B09B2101/30—Incineration ashes
-
- 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
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Biochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a utilization method for harmless treatment of fly ash, which comprises the following steps: pretreating fly ash, inoculating thiobacillus thiooxidans to carry out bioleaching on the fly ash; mixing the fly ash, and mixing the fly ash with glass powder; carrying out heat treatment on the fly ash, and melting the mixture at the high temperature of 1000-1200 ℃ to form a glass solidified body; and treating the flue gas generated by melting the fly ash, and introducing the flue gas into an acidic extracting solution to filter volatile heavy metals. The utilization method for performing harmless treatment on the fly ash utilizes the thiobacillus thiooxidans solution to perform bioleaching on the fly ash, utilizes the biological acid production effect of the thiobacillus thiooxidans to dissolve insoluble heavy metal from the fly ash solid into the solution to become soluble metal ions, and then adds a heavy metal ion precipitator to separate out and recover the dissolved heavy metal ions, thereby recovering most heavy metal in the fly ash.
Description
Technical Field
The invention belongs to the technical field of fly ash harmless treatment, and particularly relates to a utilization method for performing harmless treatment on fly ash.
Background
Along with the development of economy, the living standard of people is improved, a large number of domestic waste power plants are built, and electricity needed by production and living of people is provided, but due to the building and operation of a large number of waste incineration power plants, fly ash generated by waste incineration is in a trend of increasing year by year, a large number of fly ash brings about the problem of fly ash treatment, and how to carry out harmless treatment on the toxic and harmful fly ash becomes a problem to be solved urgently. The fly ash contains a large amount of heavy metals such as Pb, cr, cd, cu, zn, hg and the like, and the heavy metals in the fly ash can be leached out under specific conditions, so that the pollution of water and soil is caused, and the environment and the life of people are seriously influenced. The following problems exist in the prior art:
(1) In the prior art, cement solidification is a mature fly ash treatment technology, has a long history, has the advantages of rich sources of used materials, low price and easy obtainment, but has the obvious defects of large capacity increase of a lime solidified body, large cement consumption, easy corrosion of solids by acid media and severe influence of heavy metals on the surrounding environment caused by permeation.
(2) In the prior art, the heavy metals in the fly ash can only be cured, the resource waste is caused by the lack of a treatment method for recycling, and if the heavy metals in the fly ash can be extracted and utilized, the resources can be saved and the environment can be protected.
Disclosure of Invention
The invention aims to provide a utilization method for harmless treatment of fly ash, which can be used for sintering and curing the fly ash and solves the problems that a lime cured body has large capacity increase, cement consumption is large, solid is easy to be eroded by acid medium, and heavy metal can permeate out to cause bad influence on the surrounding environment.
Another object of the present invention is to provide a method for utilizing fly ash by harmless disposal, which can solve the problem of resource waste caused by the shortage of heavy metals in fly ash to be recycled, so as to achieve the effect of recovering heavy metals and protecting the environment.
In order to achieve the above purpose, the solution of the invention is:
a utilization method for carrying out harmless treatment on fly ash comprises the following steps:
s1, pretreating fly ash, inoculating thiobacillus thiooxidans to carry out bioleaching on the fly ash;
s2, mixing the fly ash, and mixing the fly ash with the glass powder;
s3, performing heat treatment on the fly ash, and melting the mixture at the high temperature of 1000-1200 ℃ to form a glass solidified body;
and S4, treating the flue gas generated by melting the fly ash, and introducing the flue gas into an acid extracting solution to filter volatile heavy metals.
The step S1 also comprises the step of adding the sorbitan monooleate polyoxyethylene ether activator with the concentration of 1.5g/L into the fly ash inoculated with the thiobacillus thiooxidans.
The step S1 also comprises the step of adding a heavy metal ion precipitator into the filtrate generated after the fly ash bioleaching to precipitate and recover the dissolved heavy metal ions.
The step S2 also comprises the step of mixing and stirring the fly ash and glass powder mixture and the silica-mesh clay according to the ratio of 1.
Sieving the mixture after mixing and stirring through a 200-mesh screen, dehydrating and drying, adding 8-10% of water, extruding and molding by using an oil press, and drying again.
And the step S3 also comprises the steps of adding calcium oxide into the electric heating furnace, roasting for 24 hours by using the electric furnace, keeping the temperature for 2 hours, and sintering at 1000 ℃, wherein the product obtained after the roasting is brown.
And S4, introducing the flue gas generated by melting the fly ash into an acidic solution to generate heavy metal acid radical ions, adding water-soluble chelating polymer, and reacting with the heavy metal ions to form a water-insoluble polymer complex so as to fix the heavy metal in the flue gas.
After the scheme is adopted, compared with the prior art, the invention has the technical progress that:
(1) The invention provides a utilization method for harmless treatment of fly ash, which is characterized in that a thiobacillus thiooxidans solution is utilized to carry out bioleaching on the fly ash, insoluble heavy metal is dissolved out of fly ash solid by utilizing the biological acid production effect of chemoautotrophic acidophilic thiobacillus such as thiobacillus thiooxidans and enters the solution to become soluble metal ions, a sorbitan monooleate polyoxyethylene ether active agent is added to obviously improve the biological oxidation rate of elemental sulfur and accelerate acidification of fly ash slurry, so that the dissolution of the heavy metal in the fly ash is improved, and the heavy metal ions dissolved out are separated out and recovered by subsequently adding a heavy metal ion separating agent, so that most of the heavy metal in the fly ash can be recovered, and the problem of resource waste caused by the shortage of the heavy metal in the fly ash in a recycling treatment method is solved.
(2) The invention provides a utilization method for harmless treatment of fly ash, which is characterized in that fly ash and glass powder mixture are mixed, silica mesh clay is added to increase viscosity for convenient molding, impurities are screened out to increase fineness of sintering fusion and not easy to break, a certain amount of calcium oxide is added to reduce melting point of the fly ash, melting of the fly ash can be promoted, volatilization of volatile metals such as Zn, cd, pb and the like in a melting process can be inhibited, metal solidification effect is enhanced, after pressing and molding, firing is carried out, organic matters in the fly ash are subjected to thermal decomposition combustion and gasification, inorganic matters are melted to form vitreous, the fly ash can be used as an external wall brick and a foundation block of a foundation dam, slag is subjected to melting treatment to obtain high-density and completely sintered substances, and stable slag can be used as roadbed materials, concrete aggregates, asphalt aggregates and the like to achieve the purpose of effectively utilizing the fly ash, and the problems that the capacity increase of a lime solidified body is large, cement consumption is large, solids are easy to be eroded by acidic media, heavy metals can permeate out to cause bad influence on the surrounding environment are solved.
(3) The invention provides a utilization method for carrying out harmless treatment on fly ash, which is characterized in that flue gas generated by melting the fly ash is introduced into an acid solution to generate heavy metal acid radical ions, then water-soluble chelating polymer is added to react with the heavy metal ions to form a water-insoluble polymer complex, so that heavy metal in the flue gas is fixed and extracted, the heavy metal remaining in the flue gas is prevented from polluting the air, and the purposes of saving resources and protecting the environment are achieved.
Drawings
FIG. 1 is a flow chart of the present invention.
Detailed Description
The technical solution and the advantages of the present invention will be described in detail with reference to the accompanying drawings.
Example 1
As shown in fig. 1, the present invention provides a method for utilizing fly ash in harmless disposal, comprising the steps of:
s1, pretreating fly ash, inoculating thiobacillus thiooxidans to carry out bioleaching on the fly ash;
s2, mixing the fly ash, and mixing the fly ash with glass powder;
s3, performing heat treatment on the fly ash, and melting the mixture at the high temperature of 1000-1200 ℃ to form a glass solidified body;
s4, treating the flue gas generated by melting the fly ash, and introducing the flue gas into an acid extracting solution to filter volatile heavy metals;
wherein, the step S1 also comprises adding a sorbitan monooleate polyoxyethylene ether active agent with the concentration of 1.5g/L into the fly ash inoculated with the thiobacillus thiooxidans; and the step S1 also comprises the step of adding a heavy metal ion precipitator into the filtrate generated after the fly ash bioleaching to precipitate and recover the dissolved heavy metal ions.
In this embodiment, the thiobacillus thiooxidans solution is used to bioleach the fly ash, the bioavailable acidotrophic acidophilic thiobacillus such as thiobacillus thiooxidans is used to dissolve out the insoluble heavy metals from the fly ash solids into the solution to form soluble metal ions, the sorbitan monooleate polyoxyethylene ether activator is added to significantly increase the biological oxidation rate of elemental sulfur and accelerate the acidification of the fly ash slurry, thereby increasing the dissolution of the heavy metals in the fly ash, the heavy metal ion precipitant is subsequently added to precipitate and recover the dissolved heavy metal ions, and most of the heavy metals in the fly ash can be recovered.
Example 2
As shown in fig. 1, on the basis of embodiment 1, the present invention provides a technical solution: and S2, mixing and stirring the mixture of the fly ash and the glass powder with the silica-mesh clay according to a ratio of 1.
In the embodiment, the siliceous clay is added to increase viscosity, so that molding is facilitated, impurities are screened out, the fineness of sintering and melting is increased, breakage is not easy to occur, a certain amount of calcium oxide is added, the melting point of the fly ash can be reduced, the melting of the fly ash can be promoted, the volatilization of volatile metals such as Zn, cd and Pb in the melting process can be inhibited, the metal curing effect is enhanced, after the pressing and molding, organic matters in the fly ash are subjected to thermal decomposition, combustion and gasification, inorganic matters are melted to form vitreous matters, the vitreous matters can be used as outer wall bricks and foundation blocks of dams, the molten slag is subjected to melting treatment to obtain substances with high density and complete sintering, and the stable molten slag can be used as roadbed materials, concrete aggregates, asphalt aggregates and the like, so that the purpose of effectively utilizing the fly ash is achieved.
Example 3
As shown in fig. 1, on the basis of embodiment 1, the present invention provides a technical solution: step S3 also comprises the steps of adding calcium oxide into an electric furnace, roasting for 24 hours by using the electric furnace, keeping the temperature for 2 hours, wherein the sintering temperature is 1000 ℃, and the product obtained after the roasting is brown; and step S4, introducing the flue gas generated by melting the fly ash into an acidic solution to generate heavy metal acid radical ions, adding water-soluble chelating polymer, and reacting with the heavy metal ions to form a water-insoluble polymer complex so as to fix the heavy metal in the flue gas.
In this embodiment, the flue gas generated by melting the fly ash is introduced into an acidic solution to generate heavy metal acid radical ions, and then water-soluble chelating polymer is added to react with the heavy metal ions to form a water-insoluble polymer complex, so that the heavy metal in the flue gas is immobilized and extracted, thereby preventing the heavy metal remaining in the flue gas from polluting the air.
The operation principle of the method for utilizing fly ash by the harmless treatment will be described in detail below.
As shown in fig. 1, firstly, the thiobacillus thiooxidans solution is used for bioleaching the fly ash, and the sorbitan monooleate polyoxyethylene ether active agent is added to significantly improve the biological oxidation rate of elemental sulfur, so as to accelerate acidification of fly ash slurry, thereby improving dissolution of heavy metal in the fly ash, and then the heavy metal ion precipitator is added to separate out and recover dissolved heavy metal ions, then the fly ash and glass powder mixture and silica clay are mixed and stirred according to 1, so that impurities are screened out, the fineness of sintering and melting is increased, and the breakage is not easy, a certain amount of calcium oxide is added to reduce the melting point of the fly ash, finally, the fly ash is melted to generate flue gas, the flue gas is introduced into an acidic solution to generate heavy metal acid radical ions, and then water-soluble chelated macromolecules are added to react with the heavy metal ions to form a water-insoluble macromolecule complex, so that the heavy metal in the flue gas is fixed.
The present invention has been described in general terms in the foregoing, but it will be apparent to those skilled in the art that modifications and improvements can be made thereto based on the present invention. Therefore, it is possible to modify or improve the optical characteristics of the optical fiber without departing from the spirit of the present invention.
Claims (7)
1. A utilization method for carrying out innocent treatment on fly ash is characterized by comprising the following steps:
s1, pretreating fly ash, and inoculating thiobacillus thiooxidans to carry out bioleaching on the fly ash;
s2, mixing the fly ash, and mixing the fly ash with glass powder;
s3, performing heat treatment on the fly ash, and melting the mixture at the high temperature of 1000-1200 ℃ to form a glass solidified body;
and S4, treating the flue gas generated by melting the fly ash, and introducing the flue gas into an acid extracting solution to filter volatile heavy metals.
2. A method of utilizing fly ash in a harmless manner as claimed in claim 1, wherein: the step S1 also comprises the step of adding a sorbitan monooleate polyoxyethylene ether activator with the concentration of 1.5g/L into the fly ash inoculated with the thiobacillus thiooxidans.
3. A method according to claim 1, wherein the fly ash is treated to make use of the method by harmless treatment, comprising: and the step S1 also comprises the step of adding a heavy metal ion precipitator into the filtrate generated after the fly ash bioleaching to precipitate and recover the dissolved heavy metal ions.
4. A method of utilizing fly ash in a harmless manner as claimed in claim 1, wherein: the step S2 also comprises the steps of mixing and stirring the mixture of the fly ash and the glass powder with the silica-mesh clay according to the ratio of 1.
5. A method of utilizing fly ash in a harmless process according to claim 4, wherein: sieving the mixture after mixing and stirring through a 200-mesh screen, dehydrating and drying, adding 8-10% of water, extruding and molding by using an oil press, and drying again.
6. A method of utilizing fly ash in a harmless manner as claimed in claim 1, wherein: and the step S3 also comprises the steps of adding calcium oxide into an electric furnace, roasting for 24 hours by using the electric furnace, keeping the temperature for 2 hours, and sintering at 1000 ℃, wherein the product obtained after the roasting is brown.
7. A method of utilizing fly ash in a harmless manner as claimed in claim 1, wherein: and the step S4 also comprises the steps of introducing the flue gas generated by melting the fly ash into an acidic solution to generate heavy metal acid radical ions, then adding water-soluble chelating polymer, and reacting with the heavy metal ions to form a water-insoluble polymer complex so as to fix the heavy metal in the flue gas.
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| CN202210791482.1A CN115213207A (en) | 2022-07-07 | 2022-07-07 | Utilization method for harmless treatment of fly ash |
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Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09316557A (en) * | 1996-05-29 | 1997-12-09 | Mitsubishi Heavy Ind Ltd | Recovering method of valuable material from fly ash |
| US20050137444A1 (en) * | 2003-12-23 | 2005-06-23 | Kuen-Sen Chang | Method for removing heavy metals from incinerator fly ashes |
| JP2006102614A (en) * | 2004-10-04 | 2006-04-20 | Kanazawa Hodo:Kk | Method of recycling incineration ash containing heavy metal |
| CN101773709A (en) * | 2009-12-25 | 2010-07-14 | 沈阳航空工业学院 | Universal method for fixing heavy metal in incineration fly ash by adjusting CaO/SiO2 |
| CN103846267A (en) * | 2012-11-28 | 2014-06-11 | 大连东泰产业废弃物处理有限公司 | Method for processing fly ash from burning of garbage |
| US20150143954A1 (en) * | 2012-05-25 | 2015-05-28 | Neumann Systems Group, Inc. | System and method for selectively removing metals from industrial waste |
| CN107716519A (en) * | 2017-11-07 | 2018-02-23 | 河南科技大学 | A kind of incineration of refuse flyash is innoxious and heavy metal resources method |
| CN108704926A (en) * | 2018-07-04 | 2018-10-26 | 加拿大艾浦莱斯有限公司 | A kind of processing of plasma fusing fly ash and metal recovery utilize system |
| CN109404916A (en) * | 2018-10-31 | 2019-03-01 | 重庆盎瑞悦科技有限公司 | A kind of incineration of refuse flyash high-temperature fusion harmless treatment process |
| CN110451701A (en) * | 2019-07-29 | 2019-11-15 | 苏州飞辉环境科技有限公司 | The minimizing technology of heavy metal in a kind of flying ash leachate |
| CN112391534A (en) * | 2020-10-26 | 2021-02-23 | 杭州灰弘环保科技有限公司 | Household garbage incineration fly ash reduction and resource treatment method |
| CN113289473A (en) * | 2021-06-11 | 2021-08-24 | 封云 | Method for treating heavy metal before smelting flue gas desulfurization |
| CN113492147A (en) * | 2021-07-01 | 2021-10-12 | 厦门嘉戎技术股份有限公司 | Recycling treatment process for fly ash in waste incineration plant |
| CN113683305A (en) * | 2021-08-03 | 2021-11-23 | 东方电气集团科学技术研究院有限公司 | System for melting, harmless and cooperative disposal of household garbage incineration fly ash |
| CN114538768A (en) * | 2022-01-20 | 2022-05-27 | 启迪环境科技发展股份有限公司 | Fly ash fusion vitrification pretreatment system and method |
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- 2022-07-07 CN CN202210791482.1A patent/CN115213207A/en active Pending
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09316557A (en) * | 1996-05-29 | 1997-12-09 | Mitsubishi Heavy Ind Ltd | Recovering method of valuable material from fly ash |
| US20050137444A1 (en) * | 2003-12-23 | 2005-06-23 | Kuen-Sen Chang | Method for removing heavy metals from incinerator fly ashes |
| JP2006102614A (en) * | 2004-10-04 | 2006-04-20 | Kanazawa Hodo:Kk | Method of recycling incineration ash containing heavy metal |
| CN101773709A (en) * | 2009-12-25 | 2010-07-14 | 沈阳航空工业学院 | Universal method for fixing heavy metal in incineration fly ash by adjusting CaO/SiO2 |
| US20150143954A1 (en) * | 2012-05-25 | 2015-05-28 | Neumann Systems Group, Inc. | System and method for selectively removing metals from industrial waste |
| CN103846267A (en) * | 2012-11-28 | 2014-06-11 | 大连东泰产业废弃物处理有限公司 | Method for processing fly ash from burning of garbage |
| CN107716519A (en) * | 2017-11-07 | 2018-02-23 | 河南科技大学 | A kind of incineration of refuse flyash is innoxious and heavy metal resources method |
| CN108704926A (en) * | 2018-07-04 | 2018-10-26 | 加拿大艾浦莱斯有限公司 | A kind of processing of plasma fusing fly ash and metal recovery utilize system |
| CN109404916A (en) * | 2018-10-31 | 2019-03-01 | 重庆盎瑞悦科技有限公司 | A kind of incineration of refuse flyash high-temperature fusion harmless treatment process |
| CN110451701A (en) * | 2019-07-29 | 2019-11-15 | 苏州飞辉环境科技有限公司 | The minimizing technology of heavy metal in a kind of flying ash leachate |
| CN112391534A (en) * | 2020-10-26 | 2021-02-23 | 杭州灰弘环保科技有限公司 | Household garbage incineration fly ash reduction and resource treatment method |
| CN113289473A (en) * | 2021-06-11 | 2021-08-24 | 封云 | Method for treating heavy metal before smelting flue gas desulfurization |
| CN113492147A (en) * | 2021-07-01 | 2021-10-12 | 厦门嘉戎技术股份有限公司 | Recycling treatment process for fly ash in waste incineration plant |
| CN113683305A (en) * | 2021-08-03 | 2021-11-23 | 东方电气集团科学技术研究院有限公司 | System for melting, harmless and cooperative disposal of household garbage incineration fly ash |
| CN114538768A (en) * | 2022-01-20 | 2022-05-27 | 启迪环境科技发展股份有限公司 | Fly ash fusion vitrification pretreatment system and method |
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