CN113213794A - Resource recycling method for preparing gelatinization material from incineration fly ash - Google Patents
Resource recycling method for preparing gelatinization material from incineration fly ash Download PDFInfo
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- CN113213794A CN113213794A CN202110392070.6A CN202110392070A CN113213794A CN 113213794 A CN113213794 A CN 113213794A CN 202110392070 A CN202110392070 A CN 202110392070A CN 113213794 A CN113213794 A CN 113213794A
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- 239000010881 fly ash Substances 0.000 title claims abstract description 137
- 239000000463 material Substances 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000004064 recycling Methods 0.000 title claims abstract description 13
- 239000003795 chemical substances by application Substances 0.000 claims description 38
- 239000002245 particle Substances 0.000 claims description 26
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 23
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 23
- 239000011882 ultra-fine particle Substances 0.000 claims description 18
- 238000000227 grinding Methods 0.000 claims description 15
- 229910001385 heavy metal Inorganic materials 0.000 claims description 15
- 239000000843 powder Substances 0.000 claims description 15
- 229910052759 nickel Inorganic materials 0.000 claims description 12
- 229910001570 bauxite Inorganic materials 0.000 claims description 11
- 239000000378 calcium silicate Substances 0.000 claims description 11
- 229910052918 calcium silicate Inorganic materials 0.000 claims description 11
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 claims description 11
- 239000000377 silicon dioxide Substances 0.000 claims description 11
- 235000012239 silicon dioxide Nutrition 0.000 claims description 11
- 238000002156 mixing Methods 0.000 claims description 9
- 159000000007 calcium salts Chemical class 0.000 claims description 6
- XAEFZNCEHLXOMS-UHFFFAOYSA-M potassium benzoate Chemical compound [K+].[O-]C(=O)C1=CC=CC=C1 XAEFZNCEHLXOMS-UHFFFAOYSA-M 0.000 claims description 6
- 159000000000 sodium salts Chemical class 0.000 claims description 6
- 238000013329 compounding Methods 0.000 claims description 5
- 239000000725 suspension Substances 0.000 claims description 5
- 238000004056 waste incineration Methods 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 2
- 239000002920 hazardous waste Substances 0.000 abstract description 18
- 238000002386 leaching Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 239000002910 solid waste Substances 0.000 description 7
- 239000004568 cement Substances 0.000 description 6
- 239000000047 product Substances 0.000 description 5
- 238000003837 high-temperature calcination Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 238000007711 solidification Methods 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- 230000006641 stabilisation Effects 0.000 description 3
- 238000011105 stabilization Methods 0.000 description 3
- 231100000419 toxicity Toxicity 0.000 description 3
- 230000001988 toxicity Effects 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 230000029087 digestion Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 229920000876 geopolymer Polymers 0.000 description 2
- 229910010272 inorganic material Inorganic materials 0.000 description 2
- 239000011147 inorganic material Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- 239000006004 Quartz sand Substances 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 230000000845 anti-microbial effect Effects 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005261 decarburization Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 239000010813 municipal solid waste Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000001338 self-assembly Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 231100000820 toxicity test Toxicity 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- 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
- C04B12/00—Cements not provided for in groups C04B7/00 - C04B11/00
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention belongs to the technical field of resource utilization of hazardous wastes, and provides a resource recycling method for preparing incineration fly ash into a gelled material.
Description
Technical Field
The invention belongs to the technical field of resource utilization of hazardous wastes, and particularly relates to a resource recycling method for preparing a cementitious material from incineration fly ash.
Background
When the traditional fly ash (hazardous waste) is used as cement, the mixing amount of the traditional fly ash cannot be too large and is generally not more than 10 percent, otherwise, the traditional fly ash can generate negative influence on the strength of cement-based materials and is not beneficial to subsequent use of products, and the mixing amount is lower and is not beneficial to the digestion and utilization of a large amount of fly ash at present. The fly ash (hazardous waste) and other inorganic materials are respectively ground and then assembled and encapsulated, and the prepared cementing material product has excellent compression strength and bending strength, low energy consumption, environmental protection and no pollution. The fly ash content of more than 10 percent does not greatly affect the strength of the cement test block.
Or when the fly ash mixing amount is 15%, the compressive strength of the prepared cementing material 7d can reach 55MPa, and the leaching of heavy metals is reduced by more than 96%. The method proves that the fly ash with a certain mixing amount can be used for preparing the cementing material with a certain compressive strength, has an obvious curing effect on heavy metals and also has good durability; the addition amount of the fly ash is larger than that of the fly ash used as an admixture of cement and concrete, so that the fly ash (hazardous waste) is better recycled.
In the prior art, before the fly ash is recycled, the fly ash needs to be pretreated to reduce the possible side effect of toxic and harmful substances in the fly ash on a cement-based material, and the modes are three modes of high-temperature calcination, clean water washing and alkaline solution soaking and ageing. The fly ash (hazardous waste) is recycled, and the process energy consumption and the preparation cost need to be considered, whether the product has a wide market or not, and whether toxic and harmful substances such as heavy metal, soluble salts, dioxin and the like in the fly ash (hazardous waste) can be stably solidified or decomposed or not. At present, the resource utilization of fly ash (hazardous waste) in the building material field mainly comprises four ways of preparing cement and concrete, geopolymer materials, microcrystalline glass and ceramsite, but all the ways still have certain problems: the fly ash (hazardous waste) usually needs to be pretreated by water washing and then subjected to subsequent resource utilization, and the washing wastewater often contains chloride, sulfur, heavy metals and the like with higher concentration, so that the wastewater is difficult to treat; the formation mechanism of geopolymer materials prepared using fly ash (hazardous waste) still needs further investigation and the like. From the aspects of environment, safety and economy, the physical modification mode for preparing the fly ash (hazardous waste) into the cementing material has the highest utilization rate of the fly ash from the incineration of the municipal solid waste and other solid wastes (hazardous waste), and has larger development and application space.
Disclosure of Invention
The invention aims to overcome the defects of the traditional method for recycling the fly ash, the fly ash is encapsulated by an inorganic curing agent in a physical mode, the fly ash rich in heavy metal or chloride ions is cured/stabilized, the fly ash particles are wrapped by mineral powder particles again, a waterproof inert protective layer is formed on the surface, a new cementing material is generated, the whole production process is closed and low-temperature, high-temperature calcination and chemical reaction do not exist, the solid waste is zero-discharged, and the secondary pollution of pollutants is fundamentally solved.
The technical scheme adopted by the invention is as follows:
a resource recycling method for preparing a gelatinization material from incineration fly ash is characterized by comprising the following steps:
(1) and (3) centrifugally separating the incineration fly ash in a gas suspension manner to separate fly ash rich in potassium salt, sodium salt and calcium salt and fly ash rich in heavy metal from the waste incineration fly ash, conveying the fly ash and the fly ash by adopting negative pressure of a dilute phase, and inputting the fly ash and the fly ash into different vacuum feeding hoppers.
(2) Analyzing related components of the incineration fly ash in batches, and calculating the proportion of the fly ash and the curing agent according to the analysis result;
(3) ultrafine grinding the fly ash into ultrafine fly ash particles with the particle size of 800-1000 meshes by ultrafine grinding equipment;
(4) the curing agent is superfinely ground into curing agent superfine particles with the particle size of 1200-2000 meshes by superfine grinding equipment;
(5) and fully mixing the fly ash ultrafine particles and the curing agent ultrafine particles at normal temperature and normal pressure to obtain the cementing material.
Further, in the step (2), the curing agent is mainly prepared by compounding silicon dioxide, nickel ore powder, fly ash, calcium silicate and bauxite.
Further, in the step (2), the curing agent comprises the following components in proportion: 0-20% of silicon dioxide, 10-60% of nickel ore powder, 10-30% of fly ash, 3-5% of calcium silicate and 0-5% of bauxite.
Further, in the step (5), the mass ratio of the fly ash ultrafine particles to the curing agent is 2.5-4: 1.
Compared with the prior art, the invention has the beneficial effects that: the invention has the advantages of environment-friendly process, high automation degree of equipment, convenient operation, wide material source, low price, high strength and low cost of the cured product, no re-dissolution of harmful components, safety and stability, no need of landfill, solid waste resource utilization and the like, and is widely applied in engineering.
(1) The technical process level and the automation level are high. In the curing system of the process, the processes of feeding of waste such as fly ash and the like, preparation and addition of a fixing agent, self-assembly forming and the like do not need manual operation. The whole production process keeps closed and low temperature, and high-temperature calcination and chemical reaction are avoided.
(2) The curing cost is low. In the curing process, a large amount of fly ash and quartz sand are adopted, consumed materials are obtained locally, the price is low, and the unit fly ash treatment cost is very low.
(3) The cured cementing material replaces the traditional 42.5 Portland cement, the produced high-performance cementing material is widely applied to the fields of ocean engineering construction, municipal traffic construction, infrastructure, hydraulic engineering and the like, novel materials such as high-performance repairing cementing materials and grouting materials are researched and developed simultaneously, and the application prospect is very wide. The solid waste is truly recycled without landfill, and the resource utilization is realized.
(4) After the fly ash (hazardous waste) is solidified, the leached toxicity of the formed product meets the national standard, the heavy metal and other harmful components can not be dissolved out again, and the fly ash is coated by the ultrafine powder particles, so that the stabilization and solidification of the fly ash and the heavy metal are realized, and the environment can not be threatened.
Detailed Description
Example 1
A resource recycling method for preparing a gelatinization material from incineration fly ash is characterized by comprising the following steps:
(1) and (3) centrifugally separating the incineration fly ash in a gas suspension manner to separate fly ash rich in potassium salt, sodium salt and calcium salt and fly ash rich in heavy metal from the waste incineration fly ash, conveying the fly ash and the fly ash by adopting negative pressure of a dilute phase, and inputting the fly ash and the fly ash into different vacuum feeding hoppers.
The main factor influencing the use value of the fly ash is the carbon content, the fly ash is subjected to decarburization treatment and then is subjected to centrifugal separation and classification utilization according to the particle size and the weight, so that the secondary pollution of the fly ash can be reduced, the strength of fly ash particles can be increased, the use value is improved, and the design of a super particle assembly scheme and the coating of required materials are facilitated.
(2) Analyzing related components of the incineration fly ash in batches, and calculating the proportion of the fly ash and the curing agent according to the analysis result;
further, in the step (2), the curing agent is mainly prepared by compounding silicon dioxide, nickel ore powder, fly ash, calcium silicate, bauxite and the like.
Further, in the step (2), the curing agent comprises the following components in proportion: 30% of silicon dioxide, 40% of nickel ore powder, 26% of fly ash, 3% of calcium silicate and 1% of bauxite.
(3) Ultrafine grinding the fly ash into fly ash ultrafine particles with the particle size of 800 meshes by ultrafine grinding equipment;
(4) the curing agent is superfinely ground into curing agent superfine particles with the particle size of 1200 meshes by superfine grinding equipment;
(5) and fully mixing the fly ash ultrafine particles and the curing agent ultrafine particles at normal temperature and normal pressure to obtain the cementing material.
Further, in the step (5), the mass ratio of the fly ash ultrafine particles to the curing agent is 2.5: 1.
The fly ash (hazardous waste) is rotationally suspended by high-speed airflow, the fly ash (hazardous waste) is encapsulated by ultrafine particles of inorganic materials, the fly ash (hazardous waste) rich in heavy metal or chloride ions is treated by solidification/stabilization, the fly ash particles are re-encapsulated by mineral powder particles, a waterproof inert protective layer is formed on the surface, a new gel material is generated, the whole production process is closed and low-temperature, high-temperature calcination and chemical reaction are avoided, zero emission of solid waste is realized, and secondary pollution of pollutants is fundamentally solved.
Example 2
A resource recycling method for preparing a gelatinization material from incineration fly ash is characterized by comprising the following steps:
(1) and (3) centrifugally separating the incineration fly ash in a gas suspension manner to separate fly ash rich in potassium salt, sodium salt and calcium salt and fly ash rich in heavy metal from the waste incineration fly ash, conveying the fly ash and the fly ash by adopting negative pressure of a dilute phase, and inputting the fly ash and the fly ash into different vacuum feeding hoppers.
(2) Analyzing related components of the incineration fly ash in batches, and calculating the proportion of the fly ash and the curing agent according to the analysis result;
further, in the step (2), the curing agent is mainly prepared by compounding silicon dioxide, nickel ore powder, fly ash, calcium silicate, bauxite and the like.
Further, in the step (2), the curing agent comprises the following components in proportion: 20% of silicon dioxide, 50% of nickel ore powder, 25% of fly ash, 3% of calcium silicate and 2% of bauxite.
(3) The fly ash is superfinely pulverized into fly ash superfine particles with the particle size of 900 meshes by superfine pulverizing equipment;
(4) the curing agent is superfinely ground into curing agent superfine particles with the particle size of 1500 meshes by superfine grinding equipment;
(5) and fully mixing the fly ash ultrafine particles and the curing agent ultrafine particles at normal temperature and normal pressure to obtain the cementing material.
Further, in the step (5), the mass ratio of the fly ash ultrafine particles to the curing agent is 3: 1.
Example 3
A resource recycling method for preparing a gelatinization material from incineration fly ash is characterized by comprising the following steps:
(1) and (3) centrifugally separating the incineration fly ash in a gas suspension manner to separate fly ash rich in potassium salt, sodium salt and calcium salt and fly ash rich in heavy metal from the waste incineration fly ash, conveying the fly ash and the fly ash by adopting negative pressure of a dilute phase, and inputting the fly ash and the fly ash into different vacuum feeding hoppers.
(2) Analyzing related components of the incineration fly ash in batches, and calculating the proportion of the fly ash and the curing agent according to the analysis result;
further, in the step (2), the curing agent is mainly prepared by compounding silicon dioxide, nickel ore powder, fly ash, calcium silicate, bauxite and the like.
Further, in the step (2), the curing agent comprises the following components in proportion: 20% of silicon dioxide, 60% of nickel ore powder, 10% of fly ash, 5% of calcium silicate and 5% of bauxite.
(3) Ultrafine grinding the fly ash into fly ash ultrafine particles with the particle size of 1000 meshes by ultrafine grinding equipment;
(4) the curing agent is superfinely ground into curing agent superfine particles with the particle size of 2000 meshes by superfine grinding equipment;
(5) and fully mixing the fly ash ultrafine particles and the curing agent ultrafine particles at normal temperature and normal pressure to obtain the cementing material.
Further, in the step (5), the mass ratio of the fly ash ultrafine particles to the curing agent is 4: 1.
The application mechanism of the invention is as follows:
a method for encapsulating treated or substantially untreated fly ash with an inert curing agent for curing/stabilizing the fly ash, which utilizes the cementitious properties of the material itself, such as waste, to achieve the desired curing. The whole curing process does not need to be calcined, the fly ash and the filler are assembled into a gelled material in a physical modification mode, and the self-cementing cured body is formed through coagulation and hardening. The problems of water permeability resistance, antimicrobial degradation, pollutant leaching rate and the like of the solidification and stabilization of the fly ash are solved from the material performance. The heavy metal leaching test was carried out according to the "solid waste leaching toxicity leaching method horizontal oscillation method" (GB 5086.2-1997): grinding materials such as fly ash (hazardous waste), silicon dioxide, nickel mineral powder, fly ash, calcium silicate or bauxite and the like into powder and performing superfine grinding to prepare a gelled material, weighing 100g of a sample, placing the sample into a 2L wide-mouth polyethylene bottle with a cover, adding 1L of water, adjusting the pH value to 5.8-6.3 by using NaOH or HCl, and keeping the pH value within the range. The bottle was vertically fixed on an oscillator, and the oscillation frequency was adjusted to (110. + -. 10) times/min, with an amplitude of 40 mm. Filtering with medium-speed quantitative filter paper, measuring Pb, zn, Nn, Cu, Cr and Cb of filtrate A320 by using an atomic absorption spectrometer, and measuring As and Hg by using a fluorescent screen spectrophotometer; the digestion method is carried out by using the heavy metal determination of solid waste (GB/T15555.1-1995-GB/T15555.2-1995). And (3) adopting a test block as a curing test according to the leaching toxicity identification standard of the hazardous waste, wherein the curing and maintaining time is 8 d. The solidified body was broken with a small hammer and then subjected to a leaching toxicity test, and the contents of Cu, Ni, Cd and Cr in the leachate of the solidified body were shown to be zero.
The embodiments of the present invention have been described in detail, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (4)
1. A resource recycling method for preparing a gelatinization material from incineration fly ash is characterized by comprising the following steps:
(1) carrying out centrifugal separation on incineration fly ash in a gas suspension mode, separating fly ash rich in potassium salt, sodium salt and calcium salt and fly ash rich in heavy metal from the waste incineration fly ash, conveying the fly ash and the fly ash rich in potassium salt, sodium salt and calcium salt by adopting negative pressure of a dilute phase, and inputting the fly ash and the fly ash into different vacuum feeding hoppers;
(2) analyzing related components of the incineration fly ash in batches, and calculating the proportion of the fly ash and the curing agent according to the analysis result;
(3) ultrafine grinding the fly ash into ultrafine fly ash particles with the particle size of 800-1000 meshes by ultrafine grinding equipment;
(4) the curing agent is superfinely ground into curing agent superfine particles with the particle size of 1200-2000 meshes by superfine grinding equipment;
(5) and fully mixing the fly ash ultrafine particles and the curing agent ultrafine particles at normal temperature and normal pressure to obtain the cementing material.
2. The resource recycling method for preparing the incineration fly ash into the cementitious material according to claim 1, wherein in the step (2), the curing agent is mainly prepared by compounding silicon dioxide, nickel ore powder, fly ash, calcium silicate and bauxite.
3. The resource recycling method for preparing the incineration fly ash into the cementitious material according to claim 1 or 2, characterized in that in the step (2), the curing agent comprises the following components in proportion: 0-20% of silicon dioxide, 10-60% of nickel ore powder, 10-30% of fly ash, 3-5% of calcium silicate and 0-5% of bauxite.
4. The resource recycling method for preparing the incineration fly ash into the cementitious material according to claim 1, characterized in that in the step (5), the mass ratio of the fly ash ultrafine particles to the curing agent is 2.5-4: 1.
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2021
- 2021-04-13 CN CN202110392070.6A patent/CN113213794A/en active Pending
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|---|---|---|---|---|
| EP0767150A1 (en) * | 1995-10-04 | 1997-04-09 | Sumikin Kashima Kohka Co., Ltd. | Method for treating incinerated or molten fly ash |
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| CN109761515A (en) * | 2018-12-30 | 2019-05-17 | 滨海金尼环保科技有限公司 | A kind of preparation method using the cured activation flying dust production miberal powder cementitious material of industrial residue |
| 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 |
| AU2020101816A4 (en) * | 2020-08-14 | 2020-09-24 | University Of Science & Technology Beijing | The preparation method and application of Cementing material containing large amount of waste incineration fly ash and slag |
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