CN103613299A - Preparation method of fly ash - Google Patents
Preparation method of fly ash Download PDFInfo
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- CN103613299A CN103613299A CN201310611140.8A CN201310611140A CN103613299A CN 103613299 A CN103613299 A CN 103613299A CN 201310611140 A CN201310611140 A CN 201310611140A CN 103613299 A CN103613299 A CN 103613299A
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- flyash
- preparation
- fly ash
- weight
- chemical modification
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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
- 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
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- Processing Of Solid Wastes (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention belongs to the technical field of a preparation method of fly ash. The invention relates to a preparation method of fly ash, which comprises the following steps: 1) carrying out rough grinding on the fly ash raw material to obtain fine powder; 2) screening the fly ash, and selecting 900-200-mesh granules; 3) carrying out surface spray chemical modification treatment on the fly ash; 4) adding an activating agent, and uniformly mixing to obtain a solid powder product; and 5) heating and drying to obtain the modified fly ash. The preparation method provided by the invention can fully utilize the fly ash and convert the fly ash into a reusable product, thereby greatly enhancing the cyclic utilization capacity of the industrial waste. The preparation method reduces the vacant area required by waste placement, saves the land resources and lowers the production cost.
Description
Technical field
The invention belongs to preparation method's technical field of flyash.
Background technology
Flyash is the solid waste that coal-fired station discharges, and is the dispersion system by the ultrafine particles composition of different structure and form.The main chemical compositions of flyash is silicon, aluminium, ferriferous oxide, a certain amount of calcium, magnesium, oxysulfide, the copper of trace, chromium, lead etc., and unburnt carbon granule.The main oxides of power plants flyash consists of: SiO
2, Al2O
3, FeO, Fe
2o
3, CaO, TiO
2deng.Flyash is one of industrial residue that the current discharge capacity of China is larger, and along with the development of power industry, the flyash quantity discharged of coal-burning power plant increases year by year.A large amount of flyash does not add processing, will produce airborne dust, atmosphere pollution; If enter water system, can cause river to silt up, and toxic chemical substance wherein also can work the mischief to human body and biology.Flyash can be used as concrete adulterant in addition
In concrete, can add flyash, can reach and improve performance, save cement weight, improve quality of concrete members and construction quality, reduce production costs and the object of construction costs.At present, the answering to mix substantially of mineral admixture carried out at concrete mixing plant, and breeze used will be provided after slag mill fining-off by metallurgy industry or building material industry, then stores respectively, measures, then add stirrer to mix with other starting material.This simple compound use can not be realized the real optimization in fineness, chemical constitution and ratio, and needs special storage equipment and accounting procedure, and complex manufacturing makes troubles with unfavorable to the production of ready mixed concrete.If Gai You flyash company provides composite prod to be supplied to concrete mixing plant to use, will obtain larger economic benefit and social benefit.The flyash whole nation year total emission volumn has surpassed more than one hundred million tons, and wherein obtain utilizing be less than 60%, a large amount of flyash is piled up in ash, land occupation resource not only, and to water quality and environment.So, add the comprehensive development and utilization of strength fly-ash, improve its economic benefit and added value,, from the angle of environmental protection, energy-conservation or resource reutilization, be no matter all very necessary.
Summary of the invention
For solving the deficiencies in the prior art, the invention provides a kind of preparation method of flyash.
A preparation method for flyash, comprises the following steps:
1) powdered coal ash is roughly ground and closed smalls;
2) flyash is screened, choose 900～2000 object particles;
3) described flyash is carried out to the processing of surface spray chemical modification;
4) to mixing after described interpolation promoting agent, obtain solid state powder shape product;
5) after heating, being dried, obtain described modified coal ash.
Preferably, the fly ash grain fineness described step 2) after screening is 1000～1500 orders.
Preferably, surface spray chemical modification described in described step 3) is processed by shower nozzle to directly spraying modified dose, the flyash surface after described screening.
Preferably, the chemical reagent that in described step 3), chemical modification is used comprises in silane, Aluminate, titanic acid ester any one or two or more mixing, and its weight is 0.1～2.0% of described flyash weight.
Preferred, the chemical reagent that described chemical modification is used also comprises any one or the two or more mixing in alcohol, ethyl acetate, and its weight is 0.1～3.0% of described flyash weight.
Preferably, described step 3) is to described fly ash grain modifying surface under airtight negative pressure state.
Preferably, described modification is to carry out in homogenizer.
The preparation method of flyash provided by the present invention can make full use of flyash, is translated into reusable product, and the recycle ability of this type of industrial waste is provided greatly.Reduced simultaneously and stacked the required vacant lot of refuse, saved land resources, reduced production cost.
Embodiment
Below principle of the present invention and feature are described, example, only for explaining the present invention, is not intended to limit scope of the present invention.
Embodiment 1
Powdered coal ash is roughly ground and closed smalls, screen 1500 order particles, under closing negative pressure state, in fast stirrer, carry out described fly ash grain modifying surface.In modifying process, add the Aluminate of described ash content of coal weight 1% and 3.0% alcohol.Stir after 1 hour, obtain pressed powder.After heating under 120 degrees Celsius, being dried, obtain flyash.
Embodiment 2
Powdered coal ash is roughly ground and closed smalls, screen 1000 order particles, under closing negative pressure state, in fast stirrer, carry out described fly ash grain modifying surface.In modifying process, add the silane of described ash content of coal weight 1.5% and 2.0% alcohol.Stir after 1 hour, obtain pressed powder.After heating under 120 degrees Celsius, being dried, obtain flyash.
Embodiment 3
Powdered coal ash is roughly ground and closed smalls, screen 1200 order particles, under closing negative pressure state, in fast stirrer, carry out described fly ash grain modifying surface.In modifying process, add the titanic acid ester of described ash content of coal weight 2% and 0.5% ethyl acetate.Stir after 1 hour, obtain pressed powder.After heating under 120 degrees Celsius, being dried, obtain flyash
The foregoing is only preferred embodiments of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (7)
1. a preparation method for flyash, comprises the following steps:
1) powdered coal ash is roughly ground and closed smalls;
2) flyash is screened, choose 900～2000 object particles;
3) described flyash is carried out to the processing of surface spray chemical modification;
4) to mixing after described interpolation promoting agent, obtain solid state powder shape product;
5) after heating, being dried, obtain described modified coal ash.
2. the preparation method of flyash according to claim 1, is characterized in that: the fly ash grain fineness described step 2) after screening is 1000～1500 orders.
3. the preparation method of flyash according to claim 1 and 2, is characterized in that: surface spray chemical modification described in described step 3) is processed by shower nozzle to directly spraying modified dose, the flyash surface after described screening.
4. the preparation method of flyash according to claim 1 and 2, it is characterized in that: the chemical reagent that in described step 3), chemical modification is used comprises in silane, Aluminate, titanic acid ester any one or two or more mixing, and its weight is 0.1～2.0% of described flyash weight.
5. the preparation method of flyash according to claim 4, is characterized in that: the chemical reagent that described chemical modification is used also comprises any one or the two or more mixing in alcohol, ethyl acetate, and its weight is 0.1～3.0% of described flyash weight.
6. the preparation method of flyash according to claim 1 and 2, is characterized in that: described step 3) is to described fly ash grain modifying surface under airtight negative pressure state.
7. the preparation method of flyash according to claim 6, is characterized in that: described modification is to carry out in homogenizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310611140.8A CN103613299A (en) | 2013-11-26 | 2013-11-26 | Preparation method of fly ash |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310611140.8A CN103613299A (en) | 2013-11-26 | 2013-11-26 | Preparation method of fly ash |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103613299A true CN103613299A (en) | 2014-03-05 |
Family
ID=50164028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310611140.8A Pending CN103613299A (en) | 2013-11-26 | 2013-11-26 | Preparation method of fly ash |
Country Status (1)
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|---|---|
| CN (1) | CN103613299A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105110672A (en) * | 2015-07-31 | 2015-12-02 | 武汉理工大学 | Method for homogeneously modifying pulverized coal ash by vapor deposition process |
| CN112125609A (en) * | 2020-09-20 | 2020-12-25 | 河南理工大学 | Deep hot well roadway heat damage isolation material and preparation method thereof |
| CN112500006A (en) * | 2020-12-04 | 2021-03-16 | 苏州娄城新材料科技有限公司 | Fly ash production method |
| CN112723776A (en) * | 2021-02-23 | 2021-04-30 | 佳木斯市松江水泥有限公司 | Preparation method of ultrafine fly ash |
| CN113174149A (en) * | 2021-04-27 | 2021-07-27 | 山西奇色环保科技股份有限公司 | Method for preparing composite pigment filler for paint by using fly ash |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102732063A (en) * | 2012-06-12 | 2012-10-17 | 华东师范大学 | Modified fly ash, preparation method thereof, and preparation apparatus thereof |
-
2013
- 2013-11-26 CN CN201310611140.8A patent/CN103613299A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102732063A (en) * | 2012-06-12 | 2012-10-17 | 华东师范大学 | Modified fly ash, preparation method thereof, and preparation apparatus thereof |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105110672A (en) * | 2015-07-31 | 2015-12-02 | 武汉理工大学 | Method for homogeneously modifying pulverized coal ash by vapor deposition process |
| CN112125609A (en) * | 2020-09-20 | 2020-12-25 | 河南理工大学 | Deep hot well roadway heat damage isolation material and preparation method thereof |
| CN112125609B (en) * | 2020-09-20 | 2022-03-25 | 河南理工大学 | Deep hot well roadway heat damage isolation material and preparation method thereof |
| CN112500006A (en) * | 2020-12-04 | 2021-03-16 | 苏州娄城新材料科技有限公司 | Fly ash production method |
| CN112723776A (en) * | 2021-02-23 | 2021-04-30 | 佳木斯市松江水泥有限公司 | Preparation method of ultrafine fly ash |
| CN113174149A (en) * | 2021-04-27 | 2021-07-27 | 山西奇色环保科技股份有限公司 | Method for preparing composite pigment filler for paint by using fly ash |
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Application publication date: 20140305 |