CN108975739A - A kind of preparation method of modified coal ash - Google Patents
A kind of preparation method of modified coal ash Download PDFInfo
- Publication number
- CN108975739A CN108975739A CN201810905826.0A CN201810905826A CN108975739A CN 108975739 A CN108975739 A CN 108975739A CN 201810905826 A CN201810905826 A CN 201810905826A CN 108975739 A CN108975739 A CN 108975739A
- Authority
- CN
- China
- Prior art keywords
- preparation
- coal ash
- flyash
- modified coal
- acid solution
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- 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
- C04B20/04—Heat 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
- C04B18/08—Flue dust, i.e. fly ash
-
- 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
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- Combustion & Propulsion (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a kind of preparation methods of modified coal ash, are related to building material technical field, comprising the following steps: (1) acid processing；(2) primary calcining；(3) highly basic is handled；(4) secondary clacining；A kind of preparation method of modified coal ash prepared by the present invention, having to flyash structural behaviour greatly improves, so that modified flyash is applied in mortar, the fracture resistance of concrete can be increased substantially, the water consumption and cement amount that concrete can also significantly be reduced simultaneously, significantly reduce production cost.
Description
Technical field
The invention belongs to building material technical fields, and in particular to a kind of preparation method of modified coal ash.
Background technique
Flyash is the waste of coal-burning power plant's discharge, and the discharge amount of the annual flyash in China is more than 200,000,000 t.Currently,
The utilization rate of flyash only has 30%~40%, is mainly used for building material, architectural engineering, road engineering etc., still has
Larger development and utilization space.Flyash is cheap, and has the characteristics that small, porous, the active high and strong adsorption of particle, with it
Adsorbent as oily waste water, it will obtain preferable economic benefit.
Summary of the invention
The purpose of the present invention is being directed to existing problem, a kind of preparation method of modified coal ash is provided.
The present invention is achieved by the following technical solutions:
A kind of preparation method of modified coal ash, comprising the following steps:
(1) acid processing: flyash being evenly spread in organic carboxyl acid solution and impregnates 40min, is then taken out, naturally dry；
(2) primary calcining: treated flyash is added in resistance furnace, 30min is calcined at 340-350 DEG C, so
Cooled to room temperature afterwards；
(3) highly basic is handled: treated flyash is evenly spread to and impregnates 55min in strong base solution, is then taken out, from
So dry；
(4) secondary clacining: treated flyash is added in resistance furnace, 45min is calcined at 640-650 DEG C, so
Cooling by water is to room temperature afterwards, then be dried to constant weight to get.
Further, the flyash granularity is 80 mesh.
Further, the organic carboxyl acid solution is the salicylic acid solution that mass fraction is 10%.
Further, the organic carboxyl acid solution soaking temperature is 85 DEG C.
Further, the strong base solution is the potassium hydroxide solution that mass fraction is 12%.
Further, the strong base solution soaking temperature is 75 DEG C.
Further, the drying temperature is 150 DEG C.
The present invention has the advantage that a kind of preparation method of modified coal ash prepared by the present invention compared with prior art,
Having to flyash structural behaviour greatly improves, so that modified flyash is applied in mortar, can increase substantially
The fracture resistance of concrete, flexural strength improves 20% or so, and can significantly improve the thermal insulation property of concrete, together
When can also significantly reduce the water consumption and cement amount of concrete, significantly reduce production cost.
Specific embodiment
Embodiment 1
A kind of preparation method of modified coal ash, comprising the following steps:
(1) acid processing: flyash being evenly spread in organic carboxyl acid solution and impregnates 40min, is then taken out, naturally dry；
(2) primary calcining: treated flyash is added in resistance furnace, 30min is calcined at 340 DEG C, then certainly
So it is cooled to room temperature；
(3) highly basic is handled: treated flyash is evenly spread to and impregnates 55min in strong base solution, is then taken out, from
So dry；
(4) secondary clacining: treated flyash is added in resistance furnace, 45min is calcined at 640 DEG C, then water
It is cold to be cooled to room temperature, then be dried to constant weight to get.
Further, the flyash granularity is 80 mesh.
Further, the organic carboxyl acid solution is the salicylic acid solution that mass fraction is 10%.
Further, the organic carboxyl acid solution soaking temperature is 85 DEG C.
Further, the strong base solution is the potassium hydroxide solution that mass fraction is 12%.
Further, the strong base solution soaking temperature is 75 DEG C.
Further, the drying temperature is 150 DEG C.
Embodiment 2
A kind of preparation method of modified coal ash, comprising the following steps:
(1) acid processing: flyash being evenly spread in organic carboxyl acid solution and impregnates 40min, is then taken out, naturally dry；
(2) primary calcining: treated flyash is added in resistance furnace, 30min is calcined at 350 DEG C, then certainly
So it is cooled to room temperature；
(3) highly basic is handled: treated flyash is evenly spread to and impregnates 55min in strong base solution, is then taken out, from
So dry；
(4) secondary clacining: treated flyash is added in resistance furnace, 45min is calcined at 650 DEG C, then water
It is cold to be cooled to room temperature, then be dried to constant weight to get.
Further, the flyash granularity is 80 mesh.
Further, the organic carboxyl acid solution is the salicylic acid solution that mass fraction is 10%.
Further, the organic carboxyl acid solution soaking temperature is 85 DEG C.
Further, the strong base solution is the potassium hydroxide solution that mass fraction is 12%.
Further, the strong base solution soaking temperature is 75 DEG C.
Further, the drying temperature is 150 DEG C.
Embodiment 3
A kind of preparation method of modified coal ash, comprising the following steps:
(1) acid processing: flyash being evenly spread in organic carboxyl acid solution and impregnates 40min, is then taken out, naturally dry；
(2) primary calcining: treated flyash is added in resistance furnace, 30min is calcined at 342 DEG C, then certainly
So it is cooled to room temperature；
(3) highly basic is handled: treated flyash is evenly spread to and impregnates 55min in strong base solution, is then taken out, from
So dry；
(4) secondary clacining: treated flyash is added in resistance furnace, 45min is calcined at 646 DEG C, then water
It is cold to be cooled to room temperature, then be dried to constant weight to get.
Further, the flyash granularity is 80 mesh.
Further, the organic carboxyl acid solution is the salicylic acid solution that mass fraction is 10%.
Further, the organic carboxyl acid solution soaking temperature is 85 DEG C.
Further, the strong base solution is the potassium hydroxide solution that mass fraction is 12%.
Further, the strong base solution soaking temperature is 75 DEG C.
Further, the drying temperature is 150 DEG C.
Claims (7)
1. a kind of preparation method of modified coal ash, which comprises the following steps:
(1) acid processing: flyash being evenly spread in organic carboxyl acid solution and impregnates 40min, is then taken out, naturally dry；
(2) primary calcining: treated flyash is added in resistance furnace, 30min is calcined at 340-350 DEG C, so
Cooled to room temperature afterwards；
(3) highly basic is handled: treated flyash is evenly spread to and impregnates 55min in strong base solution, is then taken out, from
So dry；
(4) secondary clacining: treated flyash is added in resistance furnace, 45min is calcined at 640-650 DEG C, so
Cooling by water is to room temperature afterwards, then be dried to constant weight to get.
2. a kind of preparation method of modified coal ash according to claim 1, which is characterized in that the flyash granularity is
80 mesh.
3. a kind of preparation method of modified coal ash according to claim 1, which is characterized in that the organic carboxyl acid solution
The salicylic acid solution for being 10% for mass fraction.
4. a kind of preparation method of modified coal ash according to claim 1, which is characterized in that the organic carboxyl acid solution
Soaking temperature is 85 DEG C.
5. a kind of preparation method of modified coal ash according to claim 1, which is characterized in that the strong base solution is matter
Measure the potassium hydroxide solution that score is 12%.
6. a kind of preparation method of modified coal ash according to claim 1, which is characterized in that the strong base solution impregnates
Temperature is 75 DEG C.
7. a kind of preparation method of modified coal ash according to claim 1, which is characterized in that the drying temperature is
150℃。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810905826.0A CN108975739A (en) | 2018-08-10 | 2018-08-10 | A kind of preparation method of modified coal ash |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810905826.0A CN108975739A (en) | 2018-08-10 | 2018-08-10 | A kind of preparation method of modified coal ash |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108975739A true CN108975739A (en) | 2018-12-11 |
Family
ID=64554889
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810905826.0A Withdrawn CN108975739A (en) | 2018-08-10 | 2018-08-10 | A kind of preparation method of modified coal ash |
Country Status (1)
| Country | Link |
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| CN (1) | CN108975739A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110773114A (en) * | 2019-10-23 | 2020-02-11 | 华北电力大学（保定） | Preparation method of modified fly ash adsorbent for VOCs (volatile organic chemicals) |
| CN115636459A (en) * | 2022-09-09 | 2023-01-24 | 华能国际电力股份有限公司 | Recovery method of absorption solvent waste liquid and CO 2 Trapping method |
-
2018
- 2018-08-10 CN CN201810905826.0A patent/CN108975739A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110773114A (en) * | 2019-10-23 | 2020-02-11 | 华北电力大学（保定） | Preparation method of modified fly ash adsorbent for VOCs (volatile organic chemicals) |
| CN115636459A (en) * | 2022-09-09 | 2023-01-24 | 华能国际电力股份有限公司 | Recovery method of absorption solvent waste liquid and CO 2 Trapping method |
| WO2024051091A1 (en) * | 2022-09-09 | 2024-03-14 | 中国华能集团清洁能源技术研究院有限公司 | Absorption solvent waste liquid recycling method and co2 capturing method |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
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Application publication date: 20181211 |