CN103816871A - Method for modifying fly ash by employing low-energy particles - Google Patents
Method for modifying fly ash by employing low-energy particles Download PDFInfo
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- CN103816871A CN103816871A CN201410070094.XA CN201410070094A CN103816871A CN 103816871 A CN103816871 A CN 103816871A CN 201410070094 A CN201410070094 A CN 201410070094A CN 103816871 A CN103816871 A CN 103816871A
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- coal ash
- modified coal
- ion beam
- flyash
- low energy
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Abstract
The invention provides a method for modifying fly ash by employing low-energy particles, which is characterized in that fly ash particles are irradiated through ion beam with low energy and certain dosage, and the modified fly ash is obtained after a certain time. The modified method is capable of destroying the oversized and porous vitreous body of the fly ash, releasing the bonding performance and improving the surface physical activity; and is capable of destroying a protection film of the surface of the vitreous body so as to increase the broken bonds dissolved by SiO2 and Al2O3 in the vitreous body, increasing the activation ingredient and improving the chemical activity.
Description
Technical field
The present invention relates to a kind of material modification technical field, particularly a kind of method that adopts low energy particle modified coal ash.
Background technology
China's flyash year total emission volumn has exceeded 200,000,000 t, but utilization rate is lower than 50%.And because stacking has taken a large amount of land resource, especially easily contaminated air, forms haze.Therefore, how to make flyash " turn waste into wealth ", have important science and economic implications.The composition of flyash is main chemical compositions Al, Si, the Fe of efficient flocculant; And because porous particle shape makes its specific area larger, particle dispersion can have been established the application foundation in water treatment.But there is the limited problem of adsorption capacity with Coal Ash Treating Wastewater.Because chemical modification method major part can only activate fly ash grain surface, the internal structure of fly ash grain is not carried out to sufficient disposal and utilization, thereby make the adsorption capacity that improves flyash become the extensive key of utilizing of industry.Therefore, flyash is carried out to surface and inner effectively modification, can greatly improve the adsorption capacity of flyash.
At present, conventional flyash modified method has: sour modification, alkali modification, salt modification etc.As: being 8 times of former ash by the specific area that the NaOH of 7M makes zeolite through hydrothermal treatment consists by flyash, is 10 times of former ash to the adsorbance of cationic dyestuff; Utilize flyash and hydrogen peroxide Combined Treatment dyeing waste water, can and remove COD to decolorizing printing and dyeing waste water; Use sulfuric acid treatment flyash, can strengthen the adsorption capacity of flyash.These chemical modification methods be all flyash by with the mixing of chemical surface modification agent, stirring, the process such as dry, pulverize, the crisp loose structure of flyash and some adhesion bodies, thin-walled hollow microballon, carbon granules etc. are broken up, become more closely knit fines particle and individual emblem pearl, improve bead surface structure, make the flyash after modification there is physical absorption and chemical coagulation double action, and make it adsorption capacity and coagulation enhancing.But, above-mentioned flyash modified method is confined to the activation of fly ash grain outer surface mostly, fly ash grain inside is not effectively activated, therefore, if can utilize the inside to flyash and the outside enforcement transformation simultaneously of certain physical method, make the flyash structure and composition after modification occur effectively to change, will contribute to improve the absorption property of flyash, and then improve its adsorption capacity.
Therefore still need a kind of brand-new method, the inside to flyash and outside enforcement are transformed simultaneously, make the flyash structure and composition after modification occur effectively to change, and improve the absorption property of flyash, and then improve its adsorption capacity.The present inventor studies discovery by experiment, and ion beam irradiation flyash can be broken up spherical more regular flyash particle, and its inner space is discharged fully, and specific area increases, thereby has completed the present invention.
Summary of the invention
The object of the present invention is to provide a kind of method of new employing low energy particle modified coal ash, utilize the physical method inside to flyash and the outside enforcement transformation simultaneously of this particle irradiation, make the flyash structure and composition after modification occur effectively to change, improve the absorption property of flyash, and then improve its adsorption capacity.
For realizing above object of the present invention, the present invention adopts following technical scheme:
Adopt a method for low energy particle modified coal ash, it is characterized in that comprising by with ion beam irradiation fly ash grain more low-yield, doses, and the lasting regular hour, obtain the step of modified coal ash.
Wherein, described fly ash grain is pearl particle or scoriform particle, and described irradiation is to carry out under flyash moving condition; Further, described pearl particle is hollow glass spheres (floating pearl), heavy wall, solid microbeads, iron shot, carbon granule, irregular vitreum or porous vitreum.
Wherein, the described more low-yield 5～50keV that is selected from, preferably, the described more low-yield 10～14keV that is selected from.
Wherein, described doses is selected from 600 × 2.0 × 10
13ions/cm
2～1100 × 2.0 × 10
13ions/cm
2; Preferably, described doses is selected from 900 × 2.0 × 10
13ions/cm
2～1100 × 2.0 × 10
13ions/cm
2.
Wherein, described ion beam is nitrogen ion beam, helium ion beam, ar-ion beam; Preferably, described ion beam is nitrogen ion beam.
Wherein, described exposure time is under flyash moving condition 10～15 minutes.
According to the method for employing low energy particle modified coal ash of the present invention, the inside to flyash and outside enforcement are transformed simultaneously, make the flyash structure and composition after modification occur effectively to change, and improve the absorption property of flyash, and then improve its adsorption capacity.
According to the method for employing low energy particle modified coal ash of the present invention, with Irradiated With Nitrogen Ion Beam flyash hollow core bead (floating pearl), heavy wall and solid microbeads (heavy pearl), iron shot (magnetic bead), carbon granule, irregular vitreum and porous vitreum etc. more low-yield, doses, can improve the activity of flyash by the etching of ion beam.This is that inner space is released because the spherical particle of many more regular flyash is broken up in ion beam irradiation, and specific area increases; Some particles are surface depression, shrinkage porosite.Therefore, ion beam destroys the vitreum of flyash, and the releasing of glass particle bonding improves its surface characteristic, and physical activity improves; And the destruction of porous particle bonding is broken the diaphragm that vitreous surface is firm, makes its inner SiO
2, Al
2o
3scission of link aggravation, activating component increases, thereby improves flyash chemism.
According to the method for employing low energy particle modified coal ash of the present invention, by the physical modification method of ion beam irradiation, simple to operate, and without using acid or alkali, environmental friendliness, the Powder ash adsorption performance after improvement promotes greatly.
Accompanying drawing explanation
Fig. 1 is the SEM spectrogram of flyash before and after embodiment of the present invention intermediate ion bundle etching, and wherein (a) is the flyash without etching; (b) be the flyash after etching.
The specific embodiment
Below in conjunction with embodiment more specifically, the present invention is done to further expansion explanation, but it is pointed out that the method for employing low energy particle modified coal ash of the present invention is not limited to this concrete radiation parameter.Obviously be understandable that for those skilled in the art, even if the following description content does not make any adjustments or revises, also can be directly applied at these unspecified other radiation parameters.
Adopt a method for low energy particle modified coal ash, by with ion beam irradiation fly ash grain more low-yield, doses, and the chronic exposure regular hour, obtain the flyash of modification.In specific embodiment, irradiation is to carry out under the condition of flyash motion.Wherein, ion beam is produced by ion generator.Formation mechanism and the device of ion beam all can be with reference to prior aries, and innovation of the present invention is to select different ion beams to carry out radiation modification to flyash.And by selecting the ion radiation treatment flyash respectively of variety classes, energy and dosage.Statistical analysis ion beam acts on pattern, particle diameter distribution, specific area, composition and the active chemical (SiO that flyash produces
2, Al
2o
3, Fe
2o
3deng) the isoparametric variation of stripping scission of link, determine the optimal ion beam modifying condition to flyash.
Flyash after modification passes through inorganic ions Zn in waste water
2+, Cr
3+, Cu
2+, pb
2+its absorption property of clearance experimental test, concrete test and characterizing method are as follows.
Process respectively containing inorganic ions Zn with the flyash that modification is good
2+, Cr
3+, Cu
2+, pb
2+waste water: in beaker, add 2g flyash, then add 10g waste water, making flyash and wastewater quality ratio is 1: 5, under room temperature, stirs 30min, then filters and obtains clear liquid, calculates residual ion by titration, gets final product to obtain the clearance of ion.By above-mentioned detection method, the result of different ions absorption is detected.
(1) Zn
2+detection: get clear liquid obtained above and be diluted with water 100mL in 300mL beaker, add ammoniacal liquor to pH=8, add 10mL ammonia-ammonium chloride buffer (pH=10), add 3 chromium black T indicators (5g/L) and be titrated to ethereal blue.Can calculate Zn according to EDTA used (c=0.01mol/L) standard liquid volume
2+concentration, gets final product to obtain Zn
2+total amount, according to initial calculation of total clearance.
(2) Cr
3+detection: get obtained above containing Cr
3+clear liquid is diluted with water 25mL in 250mL iodine flask, add 2g KI and 20mL sulfuric acid solution (c=2mol/L), in the dark place 10min, add 100mL water, with normal sodium thiosulfate solution (c=0.005mol/L) titration, nearly terminal adds 2mL starch indicator solution (10g/L) and is titrated to bright green.Can calculate Cr according to normal sodium thiosulfate liquor capacity used
3+concentration, gets final product to obtain Cr
3+total amount, according to initial calculation of total clearance.
(3) Cu
2+detection: get clear liquid obtained above and be diluted with water 150mL in 300mL conical flask, add 1.5mL ammonia-ammonium chloride buffer (pH=10), add 0.2g murexide mixed indicator, demarcate with EDTA (c=0.01mol/L) standard liquid, be titrated to rose.Can calculate Cu according to EDTA standard liquid volume used
2+concentration, gets final product to obtain Cu
2+total amount, according to initial calculation of total clearance.
(4) pb
2+detection: get clear liquid obtained above and be diluted with water 100mL, add 5g hexamethylenetetramine, 2 xylenol orange indicator (5g/L), are titrated to glassy yellow with EDTA (c=0.01mol/L) standard liquid.Can calculate pb according to EDTA standard liquid volume used
2+concentration, gets final product to obtain pb
2+total amount, according to initial calculation of total clearance.
Below will be by the method for modifying of the present invention of explaining of embodiment more specifically, but it does not form any restriction to the present invention.
Adopt the energy, 1000 × 2.0 × 10 of 12keV
13ions/cm
2the nitrogen ion beam of dosage, exposure time under flyash motion (stirring) condition 10 minutes, the modified coal ash obtaining is compared through sem analysis, as shown in Figure 1.Compared with the flyash of ion Beam Irradiation Modification not, can find that the spherical particle of many more regular flyash is broken up, inner space is released.Test the Powder ash adsorption performance after modification by preceding method, inorganic ions Cu in waste water
2+, Zn
2+, pb
2+, Cr
3+clearance reaches respectively 92.01%, 92.44%, 91.84%, 93.73%.
Comparative example 1
By parallel test, test unmodified Powder ash adsorption performance, inorganic ions Cu in waste water
2+, Zn
2+, pb
2+, Cr
3+clearance reaches respectively 74.08%, 70.02%, 68.54%, 78.05%.
Comparative example 2
By the flyash of conventional acid modification, test its absorption property, inorganic ions Cu in waste water
2+, Zn
2+, pb
2+, Cr
3+clearance reaches respectively 84.07%, 82.42%, 79.84%, 88.03%.
Embodiment 2
Adopt the energy, 900 × 2.0 × 10 of 10keV
13ions/cm
2the nitrogen ion beam of dosage, exposure time under flyash motion (stirring) condition 10 minutes, obtains modified coal ash.Test the Powder ash adsorption performance after modification by preceding method, inorganic ions Cu in waste water
2+, Zn
2+, pb
2+, Cr
3+clearance reaches respectively 78.03%, 73.11%, 71.35%, 79.91%.
Embodiment 3
Adopt the energy, 1000 × 2.0 × 10 of 10keV
13ions/cm
2the nitrogen ion beam of dosage, exposure time under flyash motion (stirring) condition 10 minutes, the modified coal ash obtaining.Test the Powder ash adsorption performance after modification by preceding method, inorganic ions Cu in waste water
2+, Zn
2+, pb
2+, Cr
3+clearance reaches respectively 83.11%, 82.20%, 80.73%, 87.62%.
Embodiment 4
Adopt the energy, 1100 × 2.0 × 10 of 10keV
13ions/cm
2the nitrogen ion beam of dosage, exposure time under flyash motion (stirring) condition 10 minutes, the modified coal ash obtaining.Test the Powder ash adsorption performance after modification by preceding method, inorganic ions Cu in waste water
2+, Zn
2+, pb
2+, Cr
3+clearance reaches respectively 86.41%, 83.14%, 82.60%, 90.17%.
Embodiment 5
Adopt the energy, 1000 × 2.0 × 10 of 12keV
13ions/cm
2the nitrogen ion beam of dosage, exposure time under flyash motion (stirring) condition 10 minutes, the modified coal ash obtaining.Test the Powder ash adsorption performance after modification by preceding method, inorganic ions Cu in waste water
2+, Zn
2+, pb
2+, Cr
3+clearance reaches respectively 92.01%, 92.44%, 91.84%, 93.73%.
Embodiment 6
Adopt the energy, 1100 × 2.0 × 10 of 12keV
13ions/cm
2the nitrogen ion beam of dosage, exposure time under flyash motion (stirring) condition 10 minutes, the modified coal ash obtaining.Test the Powder ash adsorption performance after modification by preceding method, inorganic ions Cu in waste water
2+, Zn
2+, pb
2+, Cr
3+clearance reaches respectively 92.04%, 92.94%, 91.33%, 93.29%.
Embodiment 7
Adopt the energy, 1000 × 2.0 × 10 of 14keV
13ions/cm
2the nitrogen ion beam of dosage, exposure time under flyash motion (stirring) condition 10 minutes, the modified coal ash obtaining.Test the Powder ash adsorption performance after modification by preceding method, inorganic ions Cu in waste water
2+, Zn
2+, pb
2+, Cr
3+clearance reaches respectively 92.10%, 92.47%, 91.30%, 92.08%.
Embodiment 8
Adopt the energy, 1100 × 2.0 × 10 of 14keV
13ions/cm
2the nitrogen ion beam of dosage, exposure time under flyash motion (stirring) condition 10 minutes, the modified coal ash obtaining.Test the Powder ash adsorption performance after modification by preceding method, inorganic ions Cu in waste water
2+, Zn
2+, pb
2+, Cr
3+clearance reaches respectively 92.07%, 92.39%, 91.80%, 92.47%.
In above-mentioned cross matching, exposure time unification is 10 minutes (enough in test), but is not limited to this, and proper extension exposure time also can obtain identical or better modified effect, and for example exposure time is 10～15 minutes.Just select the energy and 900 × 2.0 × 10 of 10keV, 12keV, 14keV
13ions/cm
2, 1000 × 2.0 × 10
13ions/cm
2, 1100 × 2.0 × 10
13ions/cm
2dosage, the energy and 900 × 2.0 × 10 of progressively degenerate in cross matching 10keV and 14keV
13ions/cm
2with 1100 × 2.0 × 10
13ions/cm
2dosage, final optimization pass goes out parameter: exposure time 10 minutes, the energy of 12keV and 1000 × 2.0 × 10
13ions/cm
2the nitrogen ion of dosage.
Although above the specific embodiment of the present invention has been given to describe in detail and explanation; but what should indicate is; we can carry out various equivalences to above-mentioned embodiment according to conception of the present invention and change and revise; when its function producing does not exceed spiritual that description and accompanying drawing contain yet, all should be within protection scope of the present invention.
Claims (10)
1. adopt a method for low energy particle modified coal ash, it is characterized in that comprising by with ion beam irradiation fly ash grain more low-yield, doses, and the lasting regular hour, obtain the step of modified coal ash.
2. the method for employing low energy particle modified coal ash according to claim 1, it is characterized in that described fly ash grain is pearl particle or scoriform particle, and described irradiation is to carry out under flyash moving condition.
3. the method for employing low energy particle modified coal ash according to claim 2, is characterized in that described pearl particle is hollow glass spheres, heavy wall, solid microbeads, iron shot, carbon granule, irregular vitreum or porous vitreum.
4. according to the method for the employing low energy particle modified coal ash described in claim 1 or 3, the more low-yield 5～50keV that is selected from described in it is characterized in that.
5. the method for employing low energy particle modified coal ash according to claim 4, the more low-yield 10～14keV that is selected from described in it is characterized in that.
6. according to the method for the employing low energy particle modified coal ash described in claim 1 or 3, it is characterized in that described doses is selected from 600 × 2.0 × 10
13ions/cm
2～1100 × 2.0 × 10
13ions/cm
2.
7. the method for employing low energy particle modified coal ash according to claim 6, is characterized in that described doses is selected from 900 × 2.0 × 10
13ions/cm
2～1100 × 2.0 × 10
13ions/cm
2.
8. according to the method for the employing low energy particle modified coal ash described in claim 1 or 3, it is characterized in that described ion beam is nitrogen ion beam, helium ion beam, ar-ion beam.
9. the method for employing low energy particle modified coal ash according to claim 8, is characterized in that described ion beam is nitrogen ion beam.
10. according to the method for the employing low energy particle modified coal ash described in claim 1 or 3, it is characterized in that described exposure time is under flyash moving condition 10～15 minutes.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104355784A (en) * | 2014-10-14 | 2015-02-18 | 成都新柯力化工科技有限公司 | Slow release fertilizer comprising fly ash gel and preparation method of slow release fertilizer |
| CN110449161A (en) * | 2018-05-08 | 2019-11-15 | 万华化学集团股份有限公司 | A kind of ozone catalytic oxidation catalyst and its preparation method and application |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0093831A2 (en) * | 1982-03-05 | 1983-11-16 | International Business Machines Corporation | Neutralised low energy ion beam generator, method of producing a neutralised low energy ion beam and method of producing a neutralised high energy ion beam |
| US20040009115A1 (en) * | 2002-06-13 | 2004-01-15 | Wee Thye Shen Andrew | Selective area growth of aligned carbon nanotubes on a modified catalytic surface |
| CN1669632A (en) * | 2004-12-29 | 2005-09-21 | 上海交通大学 | Method for preparing active fly ash phosphorus adsorbent |
-
2014
- 2014-02-28 CN CN201410070094.XA patent/CN103816871A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0093831A2 (en) * | 1982-03-05 | 1983-11-16 | International Business Machines Corporation | Neutralised low energy ion beam generator, method of producing a neutralised low energy ion beam and method of producing a neutralised high energy ion beam |
| US20040009115A1 (en) * | 2002-06-13 | 2004-01-15 | Wee Thye Shen Andrew | Selective area growth of aligned carbon nanotubes on a modified catalytic surface |
| CN1669632A (en) * | 2004-12-29 | 2005-09-21 | 上海交通大学 | Method for preparing active fly ash phosphorus adsorbent |
Non-Patent Citations (4)
| Title |
|---|
| 张玉宝 等: "电子束辐照与粉煤灰吸附协同处理城市污水", 《应用科技》 * |
| 肖勇丽: "辐照激发粉煤灰活性研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》 * |
| 蔡冬清 等: "等离子体技术对钒催化剂载体硅藻土的改性研究", 《硫酸工业》 * |
| 韦迎春 等: "60Co-γ射线辐照激发粉煤灰活性研究", 《建筑材料学报》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104355784A (en) * | 2014-10-14 | 2015-02-18 | 成都新柯力化工科技有限公司 | Slow release fertilizer comprising fly ash gel and preparation method of slow release fertilizer |
| CN110449161A (en) * | 2018-05-08 | 2019-11-15 | 万华化学集团股份有限公司 | A kind of ozone catalytic oxidation catalyst and its preparation method and application |
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