CN110028973A - A kind of heavy metal curing agent and its application based on polypropylene fibre and boiler ash - Google Patents
A kind of heavy metal curing agent and its application based on polypropylene fibre and boiler ash Download PDFInfo
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- CN110028973A CN110028973A CN201910353047.9A CN201910353047A CN110028973A CN 110028973 A CN110028973 A CN 110028973A CN 201910353047 A CN201910353047 A CN 201910353047A CN 110028973 A CN110028973 A CN 110028973A
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- heavy metal
- polypropylene fibre
- curing agent
- boiler ash
- metal curing
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- 229910001385 heavy metal Inorganic materials 0.000 title claims abstract description 60
- 239000000835 fiber Substances 0.000 title claims abstract description 44
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 35
- -1 polypropylene Polymers 0.000 title claims abstract description 35
- 239000004743 Polypropylene Substances 0.000 title claims abstract description 33
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 33
- 239000002994 raw material Substances 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 235000019353 potassium silicate Nutrition 0.000 claims abstract description 13
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000012190 activator Substances 0.000 claims abstract description 8
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical group [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 30
- 239000002689 soil Substances 0.000 claims description 18
- 239000004568 cement Substances 0.000 claims description 16
- 239000002910 solid waste Substances 0.000 claims description 11
- 230000004913 activation Effects 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- 239000004615 ingredient Substances 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 6
- 238000000713 high-energy ball milling Methods 0.000 claims description 4
- 230000003213 activating effect Effects 0.000 claims description 2
- 239000002699 waste material Substances 0.000 abstract description 8
- 238000006116 polymerization reaction Methods 0.000 abstract description 6
- 239000007787 solid Substances 0.000 abstract description 6
- 238000007711 solidification Methods 0.000 abstract description 6
- 230000008023 solidification Effects 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 238000002386 leaching Methods 0.000 abstract description 4
- 238000012545 processing Methods 0.000 abstract description 4
- 229910052793 cadmium Inorganic materials 0.000 abstract description 3
- 229910052745 lead Inorganic materials 0.000 abstract description 3
- 230000006641 stabilisation Effects 0.000 abstract description 3
- 238000011105 stabilization Methods 0.000 abstract description 3
- 230000005284 excitation Effects 0.000 abstract description 2
- 239000002956 ash Substances 0.000 description 32
- 239000011734 sodium Substances 0.000 description 14
- 229920000642 polymer Polymers 0.000 description 13
- 239000000463 material Substances 0.000 description 12
- 238000007906 compression Methods 0.000 description 10
- 230000006835 compression Effects 0.000 description 10
- 238000012360 testing method Methods 0.000 description 10
- 238000012423 maintenance Methods 0.000 description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 238000000498 ball milling Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 241000209094 Oryza Species 0.000 description 3
- 235000007164 Oryza sativa Nutrition 0.000 description 3
- 239000003513 alkali Substances 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 229920002678 cellulose Polymers 0.000 description 3
- 239000001913 cellulose Substances 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- HTMIBDQKFHUPSX-UHFFFAOYSA-N methdilazine Chemical group C1N(C)CCC1CN1C2=CC=CC=C2SC2=CC=CC=C21 HTMIBDQKFHUPSX-UHFFFAOYSA-N 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 235000009566 rice Nutrition 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000010430 carbonatite Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 239000010881 fly ash Substances 0.000 description 2
- 239000003673 groundwater Substances 0.000 description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 231100000614 poison Toxicity 0.000 description 2
- 230000007096 poisonous effect Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 150000005846 sugar alcohols Polymers 0.000 description 2
- 239000002352 surface water Substances 0.000 description 2
- 230000001988 toxicity Effects 0.000 description 2
- 231100000419 toxicity Toxicity 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910000323 aluminium silicate Inorganic materials 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 108700005457 microfibrillar Proteins 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/20—Agglomeration, binding or encapsulation of solid waste
- B09B3/21—Agglomeration, binding or encapsulation of solid waste using organic binders or matrix
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/40—Soil-conditioning materials or soil-stabilising materials containing mixtures of inorganic and organic compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Inorganic Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a kind of heavy metal curing agent and its application based on polypropylene fibre and boiler ash, heavy metal curing agent include following components raw material: boiler ash, alkali-activator, waterglass, polypropylene fibre and water；Mechanical strength height can be generated after carrying out ground polymerization reaction by excitation in the heavy metal curing agent, and the solidified body that physicochemical stability is good, solidification and stabilization processing is carried out to the heavy metal pollutions solid such as Pb, Cd using it, with good solidification effect, the leaching value of heavy metal reaches underground water IV class water body standard (GB/T14848-2017), and the raw material of heavy metal curing agent comes from trade waste, at low cost, it realizes waste treatment and waste, there is biggish application prospect.
Description
Technical field
The present invention relates to a kind of heavy metal curing agents, in particular to utilize the Material synthesis such as polypropylene fibre and boiler ash
Heavy metal curing agent, further relate to the stabilized side that heavy metal contaminants or waste are realized using such heavy metal curing agent
Method belongs to solid waste resource utilization and field of environmental improvement.
Background technique
Heavy metal in soil is very important to the harm of environment, under the yield and quality that can not only cause agricultural and sideline product
Drop, can also cause the pollution of surface water and groundwater, moreover it is possible to be absorbed by the body by food chain, damage human health.Therefore, right
Contaminated by heavy metals soil is renovated extremely urgent.The curing process of heavy-metal contaminated soil is a current processing huge sum of money
Belong to a kind of important means of contaminated soil.Heavy metal curing agent generally uses cement, flyash, metakaolin and kaolin etc. to make
For cementitious material, these cementitious materials are in terms of mechanical strength, freeze-thaw resistance, acid-alkali-corrosive-resisting, impervious, setting time
Excellent performance is all shown, but the research in relation to boiler ash base soil polymer is less.Boiler ash is coal-burning power plant
After coal burning, the particle being discharged from burner hearth bottom is larger or is in block-like waste residue, belongs to a kind of industrial solid castoff, not only
A large amount of space and soil are occupied to a certain extent, are polluted caused by the surface water and atmospheric environment of surrounding and are not also allowed
Ignore.The boiler ash generally generated is all that the mode of air storage is taken to be stored, and is generated due to rainwash effect
Percolate can pollute Soil Surrounding, and then threaten to quality of groundwater, generate a series of environmental problems.If can be with pot
Boiler ash sediment prepares alkali-activated carbonatite cementitious material as main material, is not only able to solve the environmental protection of boiler ash bring, Er Qieke
To solve the problems, such as the processing of heavy-metal contaminated soil, but at present and have no similar report.
Summary of the invention
For technical problem of the existing technology, first technical purpose of the invention is to be to provide a heavy metal species
Curing agent, the curing agent is using cheap boiler ash as primary raw material, using polypropylene fibre as reinforcing material, is swashed by alkali
Have many advantages, such as that high-intensitive, stability is good after hair, can effectively realize at the efficient stable solidification of solid heavy metals pollutant
Reason, the boiler ash source which uses is wide, low cost, on the one hand can resource utilization solid waste, on the other hand
Poisonous and harmful heavy metallic substance can also be solidified, achieve the purpose that the treatment of wastes with processes of wastes against one another.
The present invention also provides a kind of applications of heavy metal curing agent, are applied to heavy metal solid waste or a huge sum of money
The curing process for belonging to contaminated soil can obtain the solidified body of compression strength and High anti bending strength, and solidified body is solid to heavy metal
Change stabilization effect is good, and Leaching of Heavy Metals value reaches underground water IV class water body standard (GB/T14848-2017).
In order to achieve the above technical purposes, the present invention provides a kind of heavy metal based on polypropylene fibre and boiler ash
Curing agent comprising following components raw material: boiler ash, alkali-activator, waterglass, polypropylene fibre and water；Each component raw material
By Si/Al molar ratio be 2.4~3.0, Na/Al molar ratio is 0.6~0.8 and water-cement ratio is 2.0~2.5 progress ingredients；And it is poly-
Tacryl quality accounts within the 1% of total raw material quality.
Each component raw material is that 2.6~2.8, Na/Al molar ratio is by Si/Al molar ratio in preferred heavy metal curing agent
0.65~0.75, water-cement ratio is 2.2~2.4 progress ingredients；And polypropylene fibre quality accounts within the 0.5% of total raw material quality.
It is 0.7 that each component raw material, which is 2.7, Na/Al molar ratio by Si/Al molar ratio, in most preferred heavy metal curing agent, and water-cement ratio is
2.3 carry out ingredient, and polypropylene fibre quality accounts for the 0.3% of total raw material quality.
Preferred scheme, the boiler ash can cause grey solid impurity particle by high-energy ball milling activating pretreatment, ball milling activation
It cracks, in turn results in the crystal defects such as lattice mismatch, distortion of lattice, to be conducive to the hydrone entrance on lime-ash surface
The reaction of intragranular portion acceleration of hydration.In addition, the density of soil polyalcohol, strengthening material can be promoted by the boiler ash that ball milling refines
The mechanical property of material.More preferably high-energy ball milling condition are as follows: revolving speed is 300~800r/min, and activation time is 5~60min.Pot
0.075mm standard screen is crossed after boiler ash sediment ball milling.
Preferred scheme, the alkali-activator are NaOH solution of the concentration within the scope of 6~12mol/L, and NaOH solution is dense
Degree will will affect the Na/Al molar ratio in native aggressiveness system, if NaOH concentration is excessively high, dissolve the speed meeting of alumino-silicate in lime-ash
Accelerate, part clinker particle has little time to participate in reaction, and the native oligomer gel just quickly generated wraps up, and in turn results in soluble state
Si and Al is opposite reduces so that the polymerization reaction in later period is not complete enough, the network structure of formation does not reach enough close
Degree, and then the compression strength and flexural strength of native polymers test block are influenced, it, cannot be sufficiently molten if NaOH concentration is too low in system
Lime-ash is solved to be reacted.More preferably the concentration of sodium hydroxide solution is 8~10mol/L.
The modulus of preferred scheme, the waterglass is 3~3.5M, and modulus is bigger, indicates there are more trips in waterglass
From SiO2, viscosity and cohesive force are bigger, therefore its setting rate is also faster, while being also less readily soluble in water, the size of modulus
Amount directly affects Si/Al molar ratio and Na/Al molar ratio in system, match ratio condition appropriate can promote geo -polymerization towards
The direction of PSS type soil polymers is developed, so that test block has better mechanical property.The modulus of preferred waterglass is 3.2~
3.4M。
Preferred scheme, the length of the polypropylene fibre are 0.3~0.8cm, 10~60 μm of fibre diameter.Fiber is uniform
It is dispersed in native polymer configurations system, geo -polymerization product can be attached to fiber surface, along with the microfibrillar structure on its surface makes
The roughness on surface is improved, and improves cohesive force and frictional force between fiber and native polymers, the compression strength of test block and
Flexural strength can significantly improve, and since the fiber of high degree of dispersion can form space net structure inside native polymers, make lime-ash
It is connected between particle and hydrated product closer.And compared to other fiber-likes such as rice hull cellulose, polypropylene fibre is to native polymers
The promotion of mechanical property becomes apparent.More preferably the length of polypropylene fibre be 0.4~0.6cm, 18~48 μm of fibre diameter.
The present invention also provides a kind of application of heavy metal curing agent based on polypropylene fibre and boiler ash, applications
In heavy metal solid waste or the curing process of heavy-metal contaminated soil.
Preferred scheme, after heavy metal curing agent is mixed with heavy metal solid waste or heavy-metal contaminated soil, first
It is conserved 12~48 hours at a temperature of 40~80 DEG C, places into 20 ± 2 DEG C, the standard curing box maintenance of relative humidity 95%.Compared with
Preferred scheme after preferably mixing heavy metal curing agent with heavy metal solid waste or heavy-metal contaminated soil, first exists
It is conserved 20~28 hours at a temperature of 60~80 DEG C, places into 20 ± 2 DEG C, the standard curing box maintenance of relative humidity 95%.
Heavy metal solid waste of the invention such as metallurgical slag, slag, incineration of refuse flyash etc..
Boiler ash provides material mainly as intensity in heavy metal curing agent of the invention, and NaOH solution is as alkali-activated carbonatite
Agent, waterglass is as solidification cementing agent, and as solidified body structural reinforcement material, water is used to adjust water-cement ratio polypropylene fibre, leads to
Parlkaline excites boiler ash to carry out ground polymerization reaction, generates intensity height, the good solidified body of physicochemical stability.
The process of heavy metal curing agent curing heavy metal solid waste or soil of the invention, by heavy metal curing agent original
Material carries out ingredient according to Si/Al ratio appropriate, Na/Al ratio, water-cement ratio, first mixes boiler ash and poly- third fiber, stirring
Then 3min is added NaOH solution, modulus as waterglass and water, continues stirring 5 minutes, while mixing required cured heavy metal
Solid waste or soil are uniformly mixed, demould after conserving 24 hours at a temperature of 80 DEG C, place into 20 ± 2 DEG C, relative humidity
95% standard curing box conserves a period of time, obtains solidified body.
Water-cement ratio of the invention is the conventional conception of this field: referring to every cubic meter of concrete water consumption and all gelling materials
The ratio of the ratio of material dosage, water and glue is mass ratio.
Compared with the prior art, technical solution of the present invention bring advantageous effects:
1) mechanical strength height, and object can be generated after carrying out ground polymerization reaction by excitation in heavy metal curing agent of the invention
Change the good solidified body of stability, solidification and stabilization processing is carried out to the heavy metal pollutions solid such as Pb, Cd, there is good solidification effect
Fruit, the leaching value of heavy metal reach underground water IV class water body standard (GB/T14848-2017).
2) trade waste (boiler ash) that heavy metal curing agent of the invention uses is used as primary raw material, and source is wide
It is general, it is cheap, be not only able to resource utilization solid waste, and poisonous and harmful heavy metallic substance can also be solidified, reach with
It is useless to control useless purpose.
3) heavy metal curing agent preparation process of the invention is simple, and low energy consumption, non-carbon-emitting, can bring preferable economy
Benefit and social benefit.
Specific embodiment
Following embodiment is intended to further illustrate the content of present invention, rather than limits the protection model of the claims in the present invention
It encloses.
In following embodiment, curing agent is with boiler ash, alkali-activator, waterglass, polypropylene fibre (or rice hull cellulose)
And water, as basic raw material, by silica alumina ratio appropriate, sodium aluminium, when water-cement ratio carries out ingredient.
Embodiment 1
In different Si/Al molar ratios (2.4,2.7,3.0), Na/Al molar ratio (0.6,0.7,0.8), water-cement ratio 2.3, gather
Tacryl 0.3%, lime-ash prepare polypropylene fibre soil polyalcohol at 500r/min under the conditions of ball milling 35min, wherein first
Boiler ash and poly- third fiber are mixed, 3min is stirred, 10mol/L NaOH is then added, modulus is 3.3 waterglass and water, after
Continuous stirring 5 minutes, can be prepared by a kind of native polymers based on boiler ash and polypropylene fibre, then conserves for 24 hours at 80 DEG C
Demoulding, places into 20 ± 2 DEG C, and the standard curing box maintenance of relative humidity 95% measures pressure resistance after 3d, 7d and 28d
Degree and 7d flexural strength.
The compression strength and flexural strength of test block under table 1 difference Si/Al, Na/Al
Embodiment 2
Under Si/Al molar ratio 2.7, Na/Al molar ratio 0.7, the match ratio of water-cement ratio 2.3, chooses rice hull cellulose and gather
Tacryl incorporation, volume is respectively 0,0.1%, 0.3% and 0.5%, and boiler ash activation time at 500r/min is
Native polymers is prepared under the conditions of 35min, is demoulded after conserving 24 hours at a temperature of 80 DEG C, is placed into 20 ± 2 DEG C, relative humidity 95%
Standard curing box maintenance, compression strength and 7d flexural strength are measured after 3d, 7d and 28d.
Test block pressure resistance intensity and flexural strength under 2 variety classes fiber of table
Embodiment 3
Under Si/Al molar ratio 2.7, Na/Al molar ratio 0.7, the match ratio of water-cement ratio 2.3, polypropylene fiber
0.3%, boiler ash activation time 35min at 500r/min, alkali-activator NaOH concentration are respectively 6,8,9,10,12mol/
L, modulus of water glass are respectively 3.0,3.1,3.2,3.3, the 3.4 and 3.5 lower native polymers of preparation, are conserved 24 hours at a temperature of 80 DEG C
After demould, place into 20 ± 2 DEG C, the standard curing box maintenance of relative humidity 95% measures resistance to compression after 3d, 7d and 28d
Intensity and 7d flexural strength.
Test block pressure resistance intensity and flexural strength under the different alkali-activator concentration of table 3 and modulus of water glass
Embodiment 4
Under Si/Al molar ratio 2.7, Na/Al molar ratio 0.7, the match ratio of water-cement ratio 2.3, polypropylene fiber point
Not Wei 0,0.1%, 0.3% and 0.5%, boiler ash activation time at 500r/min be respectively 15min, 25min and
Native polymers is prepared under the conditions of 35min, is demoulded after conserving 24 hours at a temperature of 80 DEG C, is placed into 20 ± 2 DEG C, relative humidity 95%
Standard curing box maintenance, compression strength and 7d flexural strength are measured after 3d, 7d and 28d.
Test block pressure resistance intensity and flexural strength under the different fibers contents of table 4 and activation time
Embodiment 5
Under Si/Al molar ratio 2.7, Na/Al molar ratio 0.7, the match ratio of water-cement ratio 2.3, polypropylene fiber point
Not Wei 0.3%, boiler ash activation time at 500r/min prepares native polymers under the conditions of being 35min, respectively in curing temperature
For room temperature, 40 DEG C, 60 DEG C and 80 DEG C and curing time be 12h, for 24 hours with conserved under the conditions of 48h, place into 20 ± 2 DEG C, it is relatively wet
The standard curing box maintenance of degree 95%, measures compression strength and 7d flexural strength after 3d, 7d and 28d.
5 different curing of table and test block pressure resistance intensity and flexural strength under the Ang Hu time
Embodiment 6
Under Si/Al molar ratio 2.7, Na/Al molar ratio 0.7, the match ratio of water-cement ratio 2.3, polypropylene fiber is
0.3%, native polymers is prepared under the conditions of boiler ash activates 35min at 500r/min, while mixing a certain proportion of heavy metal
Pb and Cd simulates the heavy metal pollution of typical mineral resources Tailings Dam, and wherein Pb is with Pb (NO3)2Form is added, and Cd is with Cd (NO3)2Form
It being added, is demoulded after being conserved 24 hours at a temperature of 80 DEG C, place into 20 ± 2 DEG C, the standard curing box of relative humidity 95% conserves,
Compression strength is measured after 3d, 7d and 28d, is taken the test block of 28d age to carry out heavy metal TCLP toxicity and is leached analysis, a huge sum of money
Belong to TCLP toxicity and leach result:
The compression strength of test block under table 6-1 difference heavy metal concentration
Belong to leaching value in TCLP under table 6-2 difference heavy metal concentration
Claims (7)
1. a kind of heavy metal curing agent based on polypropylene fibre and boiler ash, it is characterised in that: including following components raw material:
Boiler ash, alkali-activator, waterglass, polypropylene fibre and water；
Each component raw material by Si/Al molar ratio is 2.4~3.0, Na/Al molar ratio is 0.6~0.8 and water-cement ratio is 2.0~2.5
Carry out ingredient；And polypropylene fibre quality accounts within the 1% of total raw material quality.
2. a kind of heavy metal curing agent based on polypropylene fibre and boiler ash according to claim 1, feature exist
In: it is 0.65~0.75 that each component raw material, which is 2.6~2.8, Na/Al molar ratio by Si/Al molar ratio, and water-cement ratio is 2.2~2.4
Carry out ingredient；And polypropylene fibre quality accounts within the 0.5% of total raw material quality.
3. a kind of heavy metal curing agent based on polypropylene fibre and boiler ash according to claim 1 or 2, feature
Be: the boiler ash passes through high-energy ball milling activating pretreatment；The high-energy ball milling condition are as follows: revolving speed is 300~800r/
Min, activation time are 5~60min.
4. a kind of heavy metal curing agent based on polypropylene fibre and boiler ash according to claim 1 or 2, feature
Be: the alkali-activator is NaOH solution of the concentration within the scope of 6~12mol/L.
5. a kind of heavy metal curing agent based on polypropylene fibre and boiler ash according to claim 1 or 2, feature
Be: the modulus of the waterglass is 3~3.5M.
6. a kind of heavy metal curing agent based on polypropylene fibre and boiler ash according to claim 1 or 2, feature
Be: the length of the polypropylene fibre be 0.3~0.8cm, 10~60 μm of fibre diameter.
7. a kind of described in any item heavy metal curing agents based on polypropylene fibre and boiler ash of claim 1~6 are answered
With, it is characterised in that: applied to heavy metal solid waste or the curing process of heavy-metal contaminated soil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910353047.9A CN110028973A (en) | 2019-04-29 | 2019-04-29 | A kind of heavy metal curing agent and its application based on polypropylene fibre and boiler ash |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910353047.9A CN110028973A (en) | 2019-04-29 | 2019-04-29 | A kind of heavy metal curing agent and its application based on polypropylene fibre and boiler ash |
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| CN110028973A true CN110028973A (en) | 2019-07-19 |
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| CN201910353047.9A Pending CN110028973A (en) | 2019-04-29 | 2019-04-29 | A kind of heavy metal curing agent and its application based on polypropylene fibre and boiler ash |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113337293A (en) * | 2021-06-23 | 2021-09-03 | 哈尔滨工业大学 | Anti-freezing solidification stabilizing agent for antimony-polluted soil and preparation method and application thereof |
| CN114455888A (en) * | 2021-12-29 | 2022-05-10 | 武汉大学(肇庆)资源与环境技术研究院 | Ash-based polymer, preparation method thereof and method for passivating heavy metals in soil |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101445390A (en) * | 2008-12-25 | 2009-06-03 | 浙江工业大学 | Method for curing soil polymer solidified body |
| CN104829200A (en) * | 2015-04-16 | 2015-08-12 | 中国矿业大学(北京) | Alkali-activated fly-ash filling material and preparation method thereof |
| CN109647859A (en) * | 2018-12-28 | 2019-04-19 | 肇庆市珈旺环境技术研究院 | Solidifying/stabilizing material for lead and chromium in waste incineration fly ash and solidifying method thereof |
-
2019
- 2019-04-29 CN CN201910353047.9A patent/CN110028973A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101445390A (en) * | 2008-12-25 | 2009-06-03 | 浙江工业大学 | Method for curing soil polymer solidified body |
| CN104829200A (en) * | 2015-04-16 | 2015-08-12 | 中国矿业大学(北京) | Alkali-activated fly-ash filling material and preparation method thereof |
| CN109647859A (en) * | 2018-12-28 | 2019-04-19 | 肇庆市珈旺环境技术研究院 | Solidifying/stabilizing material for lead and chromium in waste incineration fly ash and solidifying method thereof |
Non-Patent Citations (4)
| Title |
|---|
| ISABELLA LANCELLOTTI ET AL.: "Geopolymers: Anoptionforthevalorizationofincineratorbottomash", 《CERAMICS INTERNATIONAL》 * |
| LEI ZHENG ET AL.: "The effects of alkaline dosage and Si/Al ratio on the immobilization of heavy metals in municipal solid waste incineration fly ash-based geopolymer", 《CHEMOSPHERE》 * |
| PRINYA CHINDAPRASIRT ET AL.: "Comparative study on the characteristics of fly ash and bottom ash geopolymers", 《WASTE MANAGEMENT》 * |
| 柴倩: "碱-盐复合激发炉底渣基地质聚合物力学性能及耐久性研究", 《中国优秀硕士学位论文全文数据库 工程科技I辑》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113337293A (en) * | 2021-06-23 | 2021-09-03 | 哈尔滨工业大学 | Anti-freezing solidification stabilizing agent for antimony-polluted soil and preparation method and application thereof |
| CN114455888A (en) * | 2021-12-29 | 2022-05-10 | 武汉大学(肇庆)资源与环境技术研究院 | Ash-based polymer, preparation method thereof and method for passivating heavy metals in soil |
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