CN114180865B - Method for resource utilization of municipal refuse incineration fly ash - Google Patents
Method for resource utilization of municipal refuse incineration fly ash Download PDFInfo
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- CN114180865B CN114180865B CN202210143655.9A CN202210143655A CN114180865B CN 114180865 B CN114180865 B CN 114180865B CN 202210143655 A CN202210143655 A CN 202210143655A CN 114180865 B CN114180865 B CN 114180865B
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/24—Cements from oil shales, residues or waste other than slag
- C04B7/28—Cements from oil shales, residues or waste other than slag from combustion residues, e.g. ashes or slags from waste incineration
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/021—Ash cements, e.g. fly ash cements ; Cements based on incineration residues, e.g. alkali-activated slags from waste incineration ; Kiln dust cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/36—Manufacture of hydraulic cements in general
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00017—Aspects relating to the protection of the environment
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention provides a method for resource utilization of municipal refuse incineration fly ash. The solid waste base cementing material synergist is prepared by taking municipal waste incineration fly ash as a main raw material, adding red mud, metakaolin, fly ash and other materials, and calcining at 850-1000 ℃, so that on one hand, the synergist plays the role of early-strength minerals, and chlorine, sodium, potassium and other harmful elements of cement are used to the best, and the application performance of the solid waste base cementing material is obviously improved. On the other hand, heavy metal substances in the fly ash are solidified in the gelled material and hydration products thereof, and dioxin substances are completely decomposed at high temperature, so that safe utilization is ensured. Meanwhile, the utilization rate of the steel slag, the slag and the flue gas desulfurization gypsum can be improved. The invention has obvious environmental benefit and economic benefit.
Description
Technical Field
The invention belongs to the technical field of solid waste resource utilization, and particularly relates to a method for resource utilization of municipal waste incineration fly ash.
Background
With the continuous acceleration of the urbanization process, municipal refuse gradually becomes a burden for hindering the urban development, and the current refuse treatment methods in cities in China generally comprise sanitary landfill, composting, incineration and other modes, wherein although the refuse incineration can achieve a good reduction effect on the refuse, a large amount of fly ash from the municipal refuse incineration can be formed. At present, most municipal waste incineration fly ash is subjected to cement solidification and then is subjected to sanitary landfill, so that the volume weight of the municipal waste incineration fly ash is increased, heavy metals, dioxin and other substances in the municipal waste incineration fly ash are leached, and secondary pollution to the surrounding environment of a landfill site can be caused. In addition, when the municipal solid waste incineration fly ash is used for preparing building materials, a large amount of chloride, sodium salt and potassium salt contained in the municipal solid waste incineration fly ash can have great influence on the performance of products, so that the existing municipal solid waste incineration fly ash needs to be washed before resource utilization of the municipal solid waste incineration fly ash is carried out, the chloride, sodium salt and potassium salt in the municipal solid waste incineration fly ash reach the application level, and the operation is complex, the efficiency is low, and secondary pollution of sewage is generated.
The red mud is industrial solid waste discharged when the aluminum oxide is extracted in the aluminum production industry. Because chemical alkali combined with the red mud is difficult to remove and has large content, and contains fluorine, aluminum and other various impurities, the harmless utilization of the red mud is difficult to carry out all the time, China, as a major aluminum producing country, discharges millions of tons of red mud every year, and the reasonable disposal and the comprehensive utilization of the red mud are difficult.
Disclosure of Invention
Aiming at the problems, the invention provides a method for resource utilization of municipal refuse incineration fly ash, which adopts the technical scheme that: the method takes municipal waste incineration fly ash, red mud, metakaolin and fly ash as main raw materials, scientifically mixes active component elements such as silicon, aluminum, calcium, sodium, potassium, chlorine and the like, prepares the solid waste based cementing material synergist through low-temperature calcination, and completely decomposes dioxin.
A method for resource utilization of municipal refuse incineration fly ash comprises the following specific steps: preparing municipal waste incineration fly ash, metakaolin, red mud and fly ash into raw material balls; and calcining the raw material balls at 850-1000 ℃ for 1-7 h, taking out, quickly cooling, and grinding to prepare the solid waste base cementing material synergist.
The raw material ball comprises the following materials in parts by weight: 30-65% of municipal waste incineration fly ash, 1-30% of metakaolin, 10-50% of red mud and 1-30% of fly ash.
Further, the material alkalinity coefficient Cm of the raw material balls is 0.89-1.06.
Further, the fly ash from incineration of municipal solid waste is fly ash obtained by collecting and dedusting municipal solid waste in the incineration process by flue gas, and the fly ash from incineration of municipal solid waste mainly comprises the following components: 16-42% of CaO and SiO2 5%~13%、Al2O3 1%~7%、Fe2O3 1%~5%、MgO 3%~11%、Cl- 5%~17%、Na2O 0.5%~8%、K2O 1%~7%、SO3 5%~8%。
Further, the particle size of the material particles of the municipal refuse incineration fly ash, the metakaolin, the red mud and the fly ash is less than 0.3 mm.
Further, the solid waste based cementing material synergist mainly comprises the following components: 40-51% of CaO and SiO2 12%~17%、Al2O3 7%~13%、Fe2O3 6%~13%、MgO 3%~9%、Cl- 4%~9%、Na2O 2%~5%、K2O 1%~3%、SO3 5%~8%。
Further, the solid waste base cementing material synergist is ground into powder with the screen residue of a 0.08mm square-hole sieve of less than 10%.
The material composition and the component composition are all in weight percentage.
The invention has the following positive beneficial effects: the solid waste based gelling material synergist is prepared by calcining the mixed raw material of municipal waste incineration fly ash, metakaolin, red mud and fly ash, scientifically regulating and controlling the composition of active minerals such as calcium chloroaluminate, dicalcium silicate and calcium ferrite and elements such as chlorine, sodium and potassium, and after grinding, the solid waste based gelling material is doped, so that the synergist can play a good role in inducing and chemically co-exciting the hydration process of the calcium chloroaluminate, dicalcium silicate and calcium ferrite, is favorable for improving the hydration performance of the solid waste based gelling material, optimizes hydration products, generates more complex low-solubility complex salts containing chlorine, sulfur and iron, and improves the early and later strength and the heavy metal ion curing performance of the solid waste based gelling material. Meanwhile, dioxin in the municipal refuse incineration fly ash is decomposed in the calcining process, and heavy metal ions are solidified/stabilized in the solid waste base cementing material minerals, so that the safe utilization of the fly ash is realized, and the method has important significance for promoting the treatment of the municipal refuse incineration fly ash and the red mud and the quality improvement utilization of the solid waste base cementing material and assisting the carbon peak reaching and carbon neutralization.
Detailed Description
The production process of the present invention will be described below with reference to specific examples, but the present invention is not limited thereto. The following examples find that the test methods, unless otherwise specified, are conventional; the materials are commercially available, unless otherwise specified.
Comparative example 1 (solid waste based cementitious material, no synergist)
The solid waste base cementing material is prepared from 30% of steel slag, 60% of slag and 10% of flue gas desulfurization gypsum, 0.36 times of water is added to prepare a neat paste test piece, and the strength test is carried out after standard culture reaches the age.
Comparative example 2 (ordinary Portland cement # 42.5)
42.5# Portland cement and 0.36 times of water are added to prepare a neat paste test piece, and the strength test is carried out after standard curing to the age.
Example 1
Preparing 41.7% of municipal waste incineration fly ash, 2.6% of metakaolin, 47.4% of red mud and 8.3% of fly ash into raw material balls; placing in a box-type resistance furnace, and calcining at 950 ℃ for 300 min; after calcination, the mixture is quickly air-cooled and then ground into the powdery solid waste base cementing material synergist with the screen residue of less than 10 percent of a 0.08mm square-hole sieve.
The solid waste base gelling material comprises the following components in percentage by weight: 27 percent of steel slag, 54 percent of slag, 9 percent of flue gas desulfurization gypsum, 10 percent of solid waste-based cementing material synergist and 0.36 time of water are added to prepare a neat paste test piece, and the strength test is carried out after standard culture reaches the age.
Example 2
Preparing raw material balls by 41.7% of municipal waste incineration fly ash, 2.6% of metakaolin, 47.4% of red mud and 8.3% of fly ash; placing in a box-type resistance furnace, and calcining at 950 ℃ for 60 min; after calcination, the mixture is quickly air-cooled and then ground into the powdery solid waste base cementing material synergist with the screen residue of less than 10 percent of a 0.08mm square-hole sieve.
The solid waste base gelling material comprises the following components in percentage by weight: 27 percent of steel slag, 54 percent of slag, 9 percent of flue gas desulfurization gypsum, 10 percent of solid waste-based cementing material synergist and 0.36 time of water are added to prepare a neat paste test piece, and the strength test is carried out after standard culture reaches the age.
Example 3
Preparing raw material balls by 41.7% of municipal waste incineration fly ash, 2.6% of metakaolin, 47.4% of red mud and 8.3% of fly ash; placing in a box-type resistance furnace, and calcining at 950 ℃ for 180 min; after calcination, the mixture is quickly air-cooled and then ground into the powdery solid waste base cementing material synergist with the screen residue of less than 10 percent of a 0.08mm square-hole sieve.
The solid waste base gelling material comprises the following components in percentage by weight: 27 percent of steel slag, 54 percent of slag, 9 percent of flue gas desulfurization gypsum, 10 percent of solid waste-based cementing material synergist and 0.36 time of water are added to prepare a neat paste test piece, and the strength test is carried out after standard culture reaches the age.
Example 4
Preparing 63.3% of municipal waste incineration fly ash, 18.9% of metakaolin, 16.3% of red mud and 1.5% of fly ash into raw material balls; placing in a box-type resistance furnace, and calcining at 850 deg.C for 420 min; after calcination, the mixture is quickly air-cooled and then ground into the powdery solid waste base cementing material synergist with the screen residue of less than 10 percent of a 0.08mm square-hole sieve.
The solid waste base gelling material comprises the following components in percentage by weight: 27 percent of steel slag, 54 percent of slag, 9 percent of flue gas desulfurization gypsum, 10 percent of solid waste-based cementing material synergist and 0.36 time of water are added to prepare a neat paste test piece, and the strength test is carried out after standard culture reaches the age.
Example 5
Preparing raw material balls from 30.5% of municipal waste incineration fly ash, 27.2% of metakaolin, 14.9% of red mud and 27.4% of fly ash; placing in a box-type resistance furnace, and calcining at 900 deg.C for 300 min; after calcination, the mixture is quickly air-cooled and then ground into the powdery solid waste base cementing material synergist with the screen residue of less than 10 percent of a 0.08mm square-hole sieve.
The solid waste base gelling material comprises the following components in percentage by weight: 27 percent of steel slag, 54 percent of slag, 9 percent of flue gas desulfurization gypsum, 10 percent of solid waste-based cementing material synergist and 0.36 time of water are added to prepare a neat paste test piece, and the strength test is carried out after standard culture reaches the age.
Example 6
Preparing raw material balls by 41.7% of municipal waste incineration fly ash, 2.6% of metakaolin, 47.4% of red mud and 8.3% of fly ash; placing in a box-type resistance furnace, and calcining at 850 deg.C for 360 min; after calcination, the mixture is quickly air-cooled and then ground into the powdery solid waste base cementing material synergist with the screen residue of less than 10 percent of a 0.08mm square-hole sieve.
The solid waste base gelling material comprises the following components in percentage by weight: 27 percent of steel slag, 54 percent of slag, 9 percent of flue gas desulfurization gypsum, 10 percent of solid waste-based cementing material synergist and 0.36 time of water are added to prepare a neat paste test piece, and the strength test is carried out after standard culture reaches the age.
Example 7
Preparing raw material balls by 41.7% of municipal waste incineration fly ash, 2.6% of metakaolin, 37.4% of red mud and 18.3% of fly ash; placing in a box-type resistance furnace, and calcining at 1000 deg.C for 300 min; after calcination, the mixture is quickly air-cooled and then ground into the powdery solid waste base cementing material synergist with the screen residue of less than 10 percent of a 0.08mm square-hole sieve.
The solid waste base gelling material comprises the following components in percentage by weight: 27 percent of steel slag, 54 percent of slag, 9 percent of flue gas desulfurization gypsum, 10 percent of solid waste-based cementing material synergist and 0.36 time of water are added to prepare a neat paste test piece, and the strength test is carried out after standard culture reaches the age.
TABLE 1 test results of compressive strength of neat paste of solid waste based cementitious material
The above examples illustrate the substance of the present invention, but do not limit the scope of the present invention. It will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the true spirit and scope of the invention.
Claims (5)
1. A method for resource utilization of municipal refuse incineration fly ash comprises the following specific steps: preparing municipal waste incineration fly ash, metakaolin, red mud and fly ash into raw material balls; calcining the raw material balls at 850-1000 ℃ for 1-7 h, taking out, quickly cooling, and grinding to prepare the solid waste base cementing material synergist;
the raw material ball comprises the following materials in parts by weight: 30-65% of municipal waste incineration fly ash, 1-30% of metakaolin, 10-50% of red mud and 1-30% of fly ash;
the solid waste base cementing material synergist mainly comprises the following components: 40-51% of CaO and SiO2 12%~17%、Al2O3 7%~13%、Fe2O3 6%~13%、MgO 3%~9%、Cl- 4%~9%、Na2O 2%~5%、K2O 1%~3%、SO3 5%~8%。
2. The method for resource utilization of fly ash from incineration of municipal waste according to claim 1, wherein: the material alkalinity coefficient Cm of the raw material balls is 0.89-1.06.
3. The method for resource utilization of fly ash from incineration of municipal waste according to claim 1, wherein: the municipal solid waste incineration fly ash is fly ash obtained by flue gas dust removal and collection of municipal solid waste in an incineration treatment process, and mainly comprises the following components: 16-42% of CaO and SiO2 5%~13%、Al2O3 1%~7%、Fe2O3 1%~5%、MgO 3%~11%、Cl- 5%~17%、Na2O 0.5%~8%、K2O 1%~7%、SO3 5%~8%。
4. The method for resource utilization of fly ash from incineration of municipal waste according to claim 1, wherein: the particle size of the material particles of the municipal refuse incineration fly ash, the metakaolin, the red mud and the fly ash is less than 0.3 mm.
5. The method for resource utilization of fly ash from incineration of municipal waste according to claim 1, wherein: the residue of the solid waste base cementing material synergist 0.08mm square hole sieve is less than 10%.
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| CN114712767B (en) * | 2022-04-24 | 2023-02-14 | 长江水利委员会长江科学院 | Method for fixing chlorine and stabilizing heavy metal in fly ash |
| CN116947342B (en) * | 2023-09-18 | 2024-02-23 | 常熟理工学院 | Method for preparing cement by utilizing lithium magnesium slag extracted from salt lake and waste incineration fly ash and product thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9802865B1 (en) * | 2016-09-13 | 2017-10-31 | Nano And Advanced Materials Institute Limited | Nano-modified alkali-activated cementitious materials for rapid repair |
| CN107382239A (en) * | 2017-07-18 | 2017-11-24 | 北京科技大学 | For stablizing full solid waste casting resin and the preparation method of Han bioxin flying ash |
| CN110818294A (en) * | 2019-10-28 | 2020-02-21 | 北京科技大学 | Cementing material containing waste incineration fly ash and steel slag and slag, preparation method and application |
| CN110818293A (en) * | 2019-10-28 | 2020-02-21 | 北京科技大学 | Cementing material containing a large amount of waste incineration fly ash and slag, and preparation method and application thereof |
| CN112608088A (en) * | 2020-12-31 | 2021-04-06 | 同济大学 | Geopolymer grouting material based on incineration fly ash and preparation method thereof |
| CN113105172A (en) * | 2021-04-19 | 2021-07-13 | 燕山大学 | Heavy metal curing baking-free brick utilizing industrial solid waste and household garbage fly ash |
| CN113264715A (en) * | 2021-05-24 | 2021-08-17 | 燕山大学 | Heavy metal curing baking-free brick based on household garbage incineration fly ash and preparation method thereof |
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9802865B1 (en) * | 2016-09-13 | 2017-10-31 | Nano And Advanced Materials Institute Limited | Nano-modified alkali-activated cementitious materials for rapid repair |
| CN107382239A (en) * | 2017-07-18 | 2017-11-24 | 北京科技大学 | For stablizing full solid waste casting resin and the preparation method of Han bioxin flying ash |
| CN110818294A (en) * | 2019-10-28 | 2020-02-21 | 北京科技大学 | Cementing material containing waste incineration fly ash and steel slag and slag, preparation method and application |
| CN110818293A (en) * | 2019-10-28 | 2020-02-21 | 北京科技大学 | Cementing material containing a large amount of waste incineration fly ash and slag, and preparation method and application thereof |
| CN112608088A (en) * | 2020-12-31 | 2021-04-06 | 同济大学 | Geopolymer grouting material based on incineration fly ash and preparation method thereof |
| CN113105172A (en) * | 2021-04-19 | 2021-07-13 | 燕山大学 | Heavy metal curing baking-free brick utilizing industrial solid waste and household garbage fly ash |
| CN113264715A (en) * | 2021-05-24 | 2021-08-17 | 燕山大学 | Heavy metal curing baking-free brick based on household garbage incineration fly ash and preparation method thereof |
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