CN108383406A - The method of modified coal ash - Google Patents
The method of modified coal ash Download PDFInfo
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- CN108383406A CN108383406A CN201810278432.7A CN201810278432A CN108383406A CN 108383406 A CN108383406 A CN 108383406A CN 201810278432 A CN201810278432 A CN 201810278432A CN 108383406 A CN108383406 A CN 108383406A
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- flyash
- coal ash
- fine powder
- modified coal
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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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/023—Chemical treatment
-
- 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/026—Comminuting, e.g. by grinding or breaking; Defibrillating fibres other than asbestos
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a kind of methods of modified coal ash, and ball mill is added in flyash, crush, and sieving obtains flyash fine powder；Phosphoric acid solution is added in above-mentioned flyash fine powder to impregnate, then washes with water flyash 24 times, dries flyash fine powder；The flyash fine powder that step S2 is dried is added in batch mixer, it is heated to 60 80 DEG C, the mixed modifier that flyash weight 2 4% is incorporated as under high-speed stirred stirs 10 20min, the mixed modifier is made of lignosulfonates and alkyl phenol polyethenoxy ether sodium sulfate, discharging, it dries, you can complete the modification of flyash.The advantages that flyash dispersibility that the method for the present invention is modified improves, stability is good, water absorption rate is remarkably decreased, early strength improves and concrete base-material compatibility is good, stability is good.The flyash that this method was modified is applied in concrete, and compression strength, tensile splitting strength, the impermeability of concrete significantly improve.
Description
Technical field
The present invention relates to inorganic raw material technical field of modification, the method for specifically a kind of modified coal ash.
Background technology
Flyash is a kind of industrial residue, and China is accumulated over the years stacks total amount up to 1,000,000,000 tons or more, at present to flyash
Utilization rate there was only 40% or so, it is most of still to occupy a large amount of soil heaps and store away, polluted environment, destroy the ecological balance.
By the further investigation to flyash physicochemical properties, the form and surface texture of particle are similar to activated carbon, have compared with
Big specific surface area, while there are a large amount of Al, Fe isoreactivity points in flyash, with stronger adsorption capacity.Flyash
It has broad application prospects in terms of wastewater treatment,
Since the adsorption capacity of flyash is not high, in order to improve the absorption property of flyash, it is therefore desirable to change to flyash
Property.Currently, mainly having to the modification of raw material flyash, sour modification, alkali modification, salt be modified, mixed and modified and surfactant changes
The methods of property.Modified flyash shows the raising of the treatment effeciency to different quality waste water.But current modification side
Method has the following disadvantages：Complex process, cost are higher, modified effect is bad.Therefore, a kind of to have simultaneously compared with high performance-price ratio and excellent
The method of modifying of the flyash of anisotropic energy has great importance for the popularization and application of flyash.
The disclosure of background above technology contents is only used for inventive concept and the technical solution that auxiliary understands the present invention, not
The prior art for necessarily belonging to present patent application, no tangible proof show the above present patent application the applying date
In the case of having disclosed, above-mentioned background technology should not be taken to the novelty and creativeness of evaluation the application.
Invention content
The present invention for existing flyash there are the problem of, a kind of method of mixed modification flyash is provided.This method of modifying
Obtained flyash dispersibility improves, stability is good, water absorption rate is remarkably decreased, early strength improves, compatible with concrete base-material
Property improve the advantages that.
In order to achieve the goal above, the technical solution adopted by the present invention is as follows：
A kind of method of modified coal ash, includes the following steps：
S1：Ball mill is added in flyash, is crushed, sieving obtains flyash fine powder；
S2：Phosphoric acid solution is added in above-mentioned flyash fine powder to impregnate, then washes with water flyash 2-4 times, dries flyash fine powder；
S3：The flyash fine powder that step S2 is dried is added in batch mixer, is heated to 60-80 DEG C, powder is incorporated as under high-speed stirred
The mixed modifier of coal ash weight 2-4% stirs 10-20min, and the mixed modifier is by lignosulfonates and alkyl phenol polyoxy
Ethylene ether sodium sulfate forms, and discharging is dried, you can complete the modification of flyash.
Preferably, the mass concentration of phosphoric acid solution described in step S2 is 10-15%.
Preferably, the soaking time described in step S2 is 12-24h.
Preferably, high-speed stirred described in step S3 is stirred in the case where rotating speed is 500-1000r/min.
Preferably, the weight ratio of lignosulfonates and alkyl phenol polyethenoxy ether sodium sulfate is in the mixed modifier
1-3:1。
Preferably, the lignosulfonates are sodium lignin sulfonate.
Preferably, the alkyl phenol polyethenoxy ether sodium sulfate is Polyethylene Octylphenol Ether sodium sulphate, nonyl phenol gathers
Ethylene oxide ether sodium sulfate and dodecane phenol polyethenoxy ether sodium sulfate.
Preferably, the ball mill is horizontal ball mill.
Preferably, it is to be crushed to 40-100 mesh to be crushed described in step S1.
Compared with prior art, it advantages of the present invention and has the beneficial effect that：
1, the method for the present invention is first once modified flyash with phosphoric acid, then with lignosulfonates and alkylphenol-polyethenoxy
Ether sodium sulfate carries out second and is modified, and modified obtained flyash dispersibility improves, stability is good, water absorption rate is remarkably decreased, early
The advantages that phase intensity improves and concrete base-material compatibility is good, stability is good.
2, it is applied in concrete by the flyash that the method for the present invention was modified, the compression strength of concrete, splitting are anti-
Tensile strength, impermeability significantly improve, and modified flyash does not have harmful effect to the performance of concrete batching system.
3, there are the flyash that the present invention was modified excellent properties large-scale application can be obtained in concrete, effectively drop
Low rejected fly ash pollution on the environment, turns waste into wealth, and is conducive to build low-carbon circular economy society.
4, modifying agent raw material sources of the present invention are extensive, use cost is low, simple for process, environment friendly and pollution-free, have good
Economic benefit, ecological benefits and social benefit.
Specific implementation mode
Invention is further described in detail With reference to embodiment.It is emphasized that following the description is only
It is merely exemplary, the range being not intended to be limiting of the invention and its application.
Embodiment 1
A kind of method of modified coal ash, includes the following steps：
S1：Ball mill is added in flyash, is crushed to 60 mesh, is sieved, obtains flyash fine powder；
S2：The phosphoric acid solution that mass concentration is 10% is added in above-mentioned flyash fine powder and impregnates 20h, then washes with water flyash 3
Time, dry flyash fine powder；
S3：The flyash fine powder that step S2 is dried is added in batch mixer, is heated to 70 DEG C, the high speed in the case where rotating speed is 500r/min
It is added with stirring and stirs 15min for the mixed modifier of flyash weight 3%, the mixed modifier is 1 by mass ratio:1 wood
Quality sodium sulfonate and nonylphenol polyoxyethylene ether sulfate composition, discharging are dried, you can complete the modification of flyash.
Embodiment 2
A kind of method of modified coal ash, includes the following steps：
S1：Ball mill is added in flyash, is crushed to 100 mesh, is sieved, obtains flyash fine powder；
S2：The phosphoric acid solution that mass concentration is 12% is added in above-mentioned flyash fine powder to impregnate for 24 hours, then washes with water flyash 4
Time, dry flyash fine powder；
S3：The flyash fine powder that step S2 is dried is added in batch mixer, is heated to 80 DEG C, the high speed in the case where rotating speed is 800r/min
It is added with stirring and stirs 10min for the mixed modifier of flyash weight 2%, the mixed modifier is 2 by mass ratio:1 wood
Quality sodium sulfonate and Polyethylene Octylphenol Ether sodium sulphate composition, discharging are dried, you can complete the modification of flyash.
Embodiment 3
A kind of method of modified coal ash, includes the following steps：
S1：Ball mill is added in flyash, is crushed to 40 mesh, is sieved, obtains flyash fine powder；
S2：The phosphoric acid solution that mass concentration is 15% is added in above-mentioned flyash fine powder and impregnates 12h, then washes with water flyash 2
Time, dry flyash fine powder；
S3：The flyash fine powder that step S2 is dried is added in batch mixer, is heated to 60 DEG C, high in the case where rotating speed is 1000r/min
Speed is added with stirring stirs 20min for the mixed modifier of flyash weight 4%, and the mixed modifier is 3 by mass ratio:1
Sodium lignin sulfonate and nonylphenol polyoxyethylene ether sulfate composition, discharging are dried, you can complete the modification of flyash.
Embodiment 4
A kind of method of modified coal ash, includes the following steps：
S1：Ball mill is added in flyash, is crushed to 60 mesh, is sieved, obtains flyash fine powder；
S2：The phosphoric acid solution that mass concentration is 10% is added in above-mentioned flyash fine powder to impregnate for 24 hours, then washes with water flyash 3
Time, dry flyash fine powder；
S3：The flyash fine powder that step S2 is dried is added in batch mixer, is heated to 80 DEG C, the high speed in the case where rotating speed is 800r/min
It is added with stirring and stirs 15min for the mixed modifier of flyash weight 2.5%, the mixed modifier is 1 by mass ratio:1
Sodium lignin sulfonate and dodecane phenol polyethenoxy ether sodium sulfate composition, discharging are dried, you can complete the modification of flyash.
Embodiment 5
A kind of method of modified coal ash, includes the following steps：
S1：Ball mill is added in flyash, is crushed to 100 mesh, is sieved, obtains flyash fine powder；
S2：The phosphoric acid solution that mass concentration is 15% is added in above-mentioned flyash fine powder and impregnates 12h, then washes with water flyash 4
Time, dry flyash fine powder；
S3：The flyash fine powder that step S2 is dried is added in batch mixer, is heated to 70 DEG C, the high speed in the case where rotating speed is 500r/min
It is added with stirring and stirs 15min for the mixed modifier of flyash weight 3.5%, the mixed modifier is 2 by mass ratio:1
Sodium lignin sulfonate and Polyethylene Octylphenol Ether sodium sulphate composition, discharging are dried, you can complete the modification of flyash.
Embodiment 6
A kind of method of modified coal ash, includes the following steps：
S1：Ball mill is added in flyash, is crushed to 40 mesh, is sieved, obtains flyash fine powder；
S2：The phosphoric acid solution that mass concentration is 13% is added in above-mentioned flyash fine powder and impregnates 20h, then washes with water flyash 4
Time, dry flyash fine powder；
S3：The flyash fine powder that step S2 is dried is added in batch mixer, is heated to 60 DEG C, high in the case where rotating speed is 1000r/min
Speed is added with stirring stirs 20min for the mixed modifier of flyash weight 3%, and the mixed modifier is 1 by mass ratio:1
Sodium lignin sulfonate and dodecane phenol polyethenoxy ether sodium sulfate composition, discharging are dried, you can complete the modification of flyash.
Comparative example 1
This comparative example and embodiment 6 the difference is that：The flyash fine powder that step S2 is obtained is without 6 step S3 of embodiment
Method of modifying.
Comparative example 2
This comparative example and embodiment 6 the difference is that：Flyash fine powder is without embodiment 6 step S2 and step S3.
Application Example
The flyash that the flyash and comparative example that are modified by embodiment 1-6 obtain is applied in concrete, wherein mixed
Solidifying soil the ratio of each component is：100 parts of flyash, 600 parts of sand, 700 parts of rubble, 400 parts of cement and suitable quantity of water.By each component
It is added in concrete mixer and is stirred according to conventional concrete preparation process.Obtained concrete is by detection, product
Performance it is as shown in table 1.
Table 1：Modified coal ash of the present invention applies the properties of product in concrete
| Product | The slump（mm） | 7 days compression strength/MPa | 28 days compression strength/MPa | 28 days split tensile strength/MPa | 28 days seepage-resistant grades |
| Embodiment 1 | 261 | 38.5 | 49.7 | 2.72 | W8 |
| Embodiment 2 | 236 | 36.4 | 42.6 | 2.41 | W8 |
| Embodiment 3 | 264 | 40.1 | 47.8 | 2.74 | W8 |
| Embodiment 4 | 258 | 39.8 | 45.6 | 2.61 | W8 |
| Embodiment 5 | 278 | 43.6 | 52.7 | 2.94 | W8 |
| Embodiment 6 | 257 | 40.9 | 48.5 | 2.76 | W8 |
| Comparative example 1 | 202 | 30.1 | 35.8 | 1.98 | W6 |
| Comparative example 2 | 159 | 26.9 | 30.1 | 1.85 | W4 |
The flyash that is modified by the method for the present invention with of acid soak or only make simple and mechanical modified obtained fine coal
Ash is applied in concrete, and the flyash that this method is modified can significantly improve the compression strength of concrete, Split-tension of Rolled
Intensity, impermeability.Therefore, the flyash that this method is modified can obtain large-scale application in concrete, can be effectively
Rejected fly ash pollution on the environment is reduced, is turned waste into wealth, with good economic efficiency, ecological benefits and society's effect
Benefit..
It, cannot the above content is specific/preferred embodiment further description made for the present invention is combined
Assert that the specific implementation of the present invention is confined to these explanations.General technical staff of the technical field of the invention is come
It says, without departing from the inventive concept of the premise, some replacements or modification can also be made to the embodiment that these have been described,
And these are substituted or variant all shall be regarded as belonging to protection scope of the present invention.
Claims (9)
1. a kind of method of modified coal ash, it is characterised in that：Include the following steps：
S1：Ball mill is added in flyash, is crushed, sieving obtains flyash fine powder；
S2：Phosphoric acid solution is added in above-mentioned flyash fine powder to impregnate, then washes with water flyash 2-4 times, dries flyash fine powder；
S3：The flyash fine powder that step S2 is dried is added in batch mixer, is heated to 60-80 DEG C, powder is incorporated as under high-speed stirred
The mixed modifier of coal ash weight 2-4% stirs 10-20min, and the mixed modifier is by lignosulfonates and alkyl phenol polyoxy
Ethylene ether sodium sulfate forms, and discharging is dried, you can complete the modification of flyash.
2. the method for modified coal ash according to claim 1, it is characterised in that：The quality of phosphoric acid solution described in step S2 is dense
Degree is 10-15%.
3. the method for modified coal ash according to claim 2, it is characterised in that：Soaking time described in step S2 is 12-
24h。
4. the method for modified coal ash according to claim 1, it is characterised in that：High-speed stirred described in step S3 is in rotating speed
To be stirred under 500-1000r/min.
5. the method for modified coal ash according to claim 1, it is characterised in that：Lignin sulfonic acid in the mixed modifier
The weight ratio of salt and alkyl phenol polyethenoxy ether sodium sulfate is 1-3:1.
6. the method for modified coal ash according to claim 5, it is characterised in that：The lignosulfonates are sulfomethylated lignin
Sour sodium.
7. the method for modified coal ash according to claim 5, it is characterised in that：The alkyl phenol polyethenoxy ether sodium sulfate
For Polyethylene Octylphenol Ether sodium sulphate, nonylphenol polyoxyethylene ether sulfate and dodecane phenol polyethenoxy ether sodium sulfate.
8. the method for modified coal ash according to claim 1, it is characterised in that：The ball mill is horizontal ball mill.
9. the method for modified coal ash according to claim 1, it is characterised in that：It is to be crushed to 40- to be crushed described in step S1
100 mesh.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810278432.7A CN108383406A (en) | 2018-03-31 | 2018-03-31 | The method of modified coal ash |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810278432.7A CN108383406A (en) | 2018-03-31 | 2018-03-31 | The method of modified coal ash |
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| Publication Number | Publication Date |
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| CN108383406A true CN108383406A (en) | 2018-08-10 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109354860A (en) * | 2018-10-22 | 2019-02-19 | 安徽理工大学 | A kind of composite non-slip material and preparation method thereof |
| CN110395930A (en) * | 2019-08-30 | 2019-11-01 | 陕西理工大学 | A kind of composite modified flyash and preparation method thereof |
| CN112591838A (en) * | 2020-10-29 | 2021-04-02 | 江苏京源环保股份有限公司 | Method for removing high-concentration chloride ions in water by using modified fly ash |
| US20210346838A1 (en) * | 2020-05-11 | 2021-11-11 | Wisconsin Alumni Research Foundation | Method for sulfur removal from coal fly ash |
| CN116477967A (en) * | 2023-05-05 | 2023-07-25 | 烟台大学 | Porous fly ash modified foam concrete, and preparation method and application thereof |
-
2018
- 2018-03-31 CN CN201810278432.7A patent/CN108383406A/en not_active Withdrawn
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109354860A (en) * | 2018-10-22 | 2019-02-19 | 安徽理工大学 | A kind of composite non-slip material and preparation method thereof |
| CN109354860B (en) * | 2018-10-22 | 2021-12-21 | 安徽理工大学 | Composite anti-skid material and preparation method thereof |
| CN110395930A (en) * | 2019-08-30 | 2019-11-01 | 陕西理工大学 | A kind of composite modified flyash and preparation method thereof |
| US20210346838A1 (en) * | 2020-05-11 | 2021-11-11 | Wisconsin Alumni Research Foundation | Method for sulfur removal from coal fly ash |
| US11597683B2 (en) * | 2020-05-11 | 2023-03-07 | Wisconsin Alumni Research Foundation | Method for sulfur removal from coal fly ash |
| CN112591838A (en) * | 2020-10-29 | 2021-04-02 | 江苏京源环保股份有限公司 | Method for removing high-concentration chloride ions in water by using modified fly ash |
| CN116477967A (en) * | 2023-05-05 | 2023-07-25 | 烟台大学 | Porous fly ash modified foam concrete, and preparation method and application thereof |
| CN116477967B (en) * | 2023-05-05 | 2024-01-26 | 烟台大学 | Porous fly ash modified foam concrete, and preparation method and application thereof |
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Application publication date: 20180810 |