CN114573254A - Sludge curing agent, composite material and preparation method thereof - Google Patents
Sludge curing agent, composite material and preparation method thereof Download PDFInfo
- Publication number
- CN114573254A CN114573254A CN202210173658.7A CN202210173658A CN114573254A CN 114573254 A CN114573254 A CN 114573254A CN 202210173658 A CN202210173658 A CN 202210173658A CN 114573254 A CN114573254 A CN 114573254A
- Authority
- CN
- China
- Prior art keywords
- parts
- curing agent
- sludge
- water
- phosphogypsum
- 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.)
- Pending
Links
- 239000010802 sludge Substances 0.000 title claims abstract description 77
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 51
- 239000002131 composite material Substances 0.000 title claims abstract description 20
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 52
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 47
- 235000019353 potassium silicate Nutrition 0.000 claims abstract description 46
- 239000010881 fly ash Substances 0.000 claims abstract description 43
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 claims abstract description 42
- 239000002893 slag Substances 0.000 claims abstract description 38
- 238000003756 stirring Methods 0.000 claims abstract description 24
- 239000000843 powder Substances 0.000 claims abstract description 21
- 238000002156 mixing Methods 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 8
- 239000000126 substance Substances 0.000 abstract description 9
- 238000006243 chemical reaction Methods 0.000 abstract description 8
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 5
- 239000002994 raw material Substances 0.000 abstract description 5
- 238000001179 sorption measurement Methods 0.000 abstract description 4
- 230000007797 corrosion Effects 0.000 abstract description 3
- 238000005260 corrosion Methods 0.000 abstract description 3
- 238000013508 migration Methods 0.000 abstract description 3
- 230000005012 migration Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000003344 environmental pollutant Substances 0.000 abstract description 2
- 231100000719 pollutant Toxicity 0.000 abstract description 2
- 238000007711 solidification Methods 0.000 abstract description 2
- 230000008023 solidification Effects 0.000 abstract description 2
- 239000012467 final product Substances 0.000 abstract 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 15
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 7
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 7
- 239000002699 waste material Substances 0.000 description 7
- 238000003912 environmental pollution Methods 0.000 description 6
- 239000003245 coal Substances 0.000 description 5
- 239000005997 Calcium carbide Substances 0.000 description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 4
- 230000005484 gravity Effects 0.000 description 4
- 239000002689 soil Substances 0.000 description 4
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000004800 polyvinyl chloride Substances 0.000 description 3
- 238000013112 stability test Methods 0.000 description 3
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000003301 hydrolyzing effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000002367 phosphate rock Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 241000282414 Homo sapiens Species 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 238000003776 cleavage reaction Methods 0.000 description 1
- 238000012669 compression test Methods 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 244000052769 pathogen Species 0.000 description 1
- -1 pipes Substances 0.000 description 1
- 239000003755 preservative agent Substances 0.000 description 1
- 230000002335 preservative effect Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 230000007017 scission Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
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
- C04B7/00—Hydraulic cements
- C04B7/24—Cements from oil shales, residues or waste other than slag
- C04B7/243—Mixtures thereof with activators or composition-correcting additives, e.g. mixtures of fly ash and alkali activators
-
- 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
- C04B11/00—Calcium sulfate cements
- C04B11/26—Calcium sulfate cements strating from chemical gypsum; starting from phosphogypsum or from waste, e.g. purification products of smoke
-
- 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
- C04B11/00—Calcium sulfate cements
- C04B11/28—Mixtures thereof with other inorganic cementitious materials
-
- 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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/006—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing mineral polymers, e.g. geopolymers of the Davidovits type
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00017—Aspects relating to the protection of the environment
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a sludge curing agent, a composite material and a preparation method thereof, wherein the sludge curing agent comprises the following components: 40-50 parts of fly ash, 10-20 parts of carbide slag, 5-10 parts of phosphogypsum, 4-6 parts of water glass and a plurality of parts of water; the composite material comprises sludge and a sludge curing agent, wherein the sludge curing agent accounts for 8-11% of the mass of the sludge; the sludge curing agent is prepared by the following steps: mixing and uniformly stirring fly ash, carbide slag and phosphogypsum to obtain powder; adding water glass and water into the powder, and stirring to obtain the final product. The invention adopts the carbide slag, the fly ash and the phosphogypsum with set proportion as raw materials, and adds a proper amount of water glass to stimulate the volcanic reaction among the carbide slag, the fly ash and the phosphogypsum to generate a large amount of gelled substances, thereby improving the adsorption performance on one hand to adsorb heavy metals and avoid the migration of pollutants, and being beneficial to more compact sludge solidification bodies, higher structural strength and better corrosion resistance on the other hand.
Description
Technical Field
The invention relates to the technical field of electrodeless composite materials, in particular to a sludge curing agent, a composite material and a preparation method thereof.
Background
Polyvinyl chloride (PVC) is a widely used chemical product, and is widely used in construction materials, pipes, films, wires and cables, and the like. At present, more than 80 percent of PVC in China is produced by adopting a coal-based calcium carbide method, namely, calcium carbide is hydrolyzed to obtain acetylene gas (C)2H2) Acetylene gas (C)2H2) And producing PVC with HCl generated by electrolysis of industrial salt. In the process, a large amount of waste water and calcium carbide waste residues are discharged when acetylene gas is prepared by hydrolyzing calcium carbide, and the comprehensive utilization is not high, so that the pollution to the ground surface and underground water is easily caused and the ecological environment is greatly damaged due to the adoption of landfill or stacked storage.
The coal is one of the main energy substances in China, the demand for the coal in life and production is huge, the coal consumption in China is exponentially increased, and huge energy is generated in the process, and meanwhile, a large amount of harmful gas (such as CO) can be generatedX、NOXAnd SOX) And discharging a large amount of fly ash.
The phosphogypsum is an industrial byproduct generated when phosphate rock is used for producing phosphoric acid, has huge stockpiling amount in China, has a plurality of excellent performances, has high content of calcium sulfate dihydrate and is an excellent choice for natural gypsum substitutes.
China is a country with numerous inland lakes and rivers, and through long-time geological evolution and urbanization development, a large amount of domestic sewage and garbage are discharged into the rivers and the lakes, a large amount of polluted sludge and mucky soil are deposited, a large amount of sludge is discharged from each large sewage treatment plant, and the sludge is stacked or buried, so that the problems of environment pollution, urban space occupation and higher stacking and transportation cost are certainly caused. Meanwhile, the sludge has high water content and low strength, and may contain harmful components such as toxic heavy metal substances, pathogenic organisms and the like to cause great influence on the environment and human beings.
At present, most of the traditional sludge treatment methods mainly use cement, lime and other materials as curing agents, and then add some additives capable of improving the physical and mechanical properties of the cured soil, however, the addition of these materials requires high cost investment, and is easy to cause environmental pollution and damage soil quality.
Therefore, the method has great significance for fully and effectively secondarily utilizing the wastes such as the fly ash, the carbide slag and the phosphogypsum to develop the solidified sludge composite material which is efficient, cheap, green, environment-friendly, nontoxic, convenient to construct and simple in process.
Disclosure of Invention
The invention aims to overcome at least one technical defect, provides a sludge curing agent, a composite material and a preparation method thereof, and solves the technical problems that wastes such as fly ash, carbide slag and phosphogypsum cannot be effectively utilized and environmental pollution is easily caused in the prior art.
In order to achieve the technical purpose, the first aspect of the technical scheme of the invention provides a sludge curing agent, which comprises the following components in parts by weight: 40-50 parts of fly ash, 10-20 parts of carbide slag, 5-10 parts of phosphogypsum, 4-6 parts of water glass and a plurality of parts of water; the water content of the water glass in the sludge curing agent and the total mass of water are as follows: the total mass of the fly ash, the carbide slag and the phosphogypsum is (0.2-0.3): 1.
Preferably, the water content of the water glass in the sludge curing agent and the total mass of water are as follows: the total mass of the fly ash, the carbide slag and the phosphogypsum is 0.25: 1.
Preferably, the modulus of the water glass is 1.0-2.0.
Preferably, the fly ash is particles above 700 meshes, the carbide slag is particles above 600 meshes, and the phosphogypsum is powdery.
Preferably, the sludge curing agent comprises the following components in parts by weight: 40 parts of fly ash, 15 parts of carbide slag, 10 parts of phosphogypsum, 5 parts of water glass and 15 parts of water
The second aspect of the present invention further provides a preparation method of the above sludge curing agent, which comprises the following steps:
mixing 40-50 parts of fly ash, 10-20 parts of carbide slag and 5-10 parts of phosphogypsum, and uniformly stirring to obtain powder;
adding 4-6 parts of water glass and a plurality of parts of water into the powder, and uniformly stirring to obtain the sludge curing agent; wherein the water content of the water glass in the sludge curing agent and the total mass of water are as follows: the total mass of the fly ash, the carbide slag and the phosphogypsum is (0.2-0.3): 1.
Preferably, the preparation method further comprises the steps of adjusting the modulus of the water glass to 1.0-2.0 and standing for 24 hours before adding the powder into the water glass.
Preferably, the modulus of the water glass is adjusted by adding NaOH.
Preferably, the mixing time of the fly ash, the carbide slag and the phosphogypsum is not less than 120s, and the mixing time of the water glass, the water and the powder is not less than 300 s.
The invention also provides a composite material which comprises the sludge and the sludge curing agent, wherein the sludge curing agent accounts for 8-11% of the mass of the sludge.
Compared with the prior art, the invention adopts the acetylene sludge, the fly ash and the phosphogypsum which are set in proportion as raw materials, and adds a proper amount of water glass to stimulate the volcanic reaction among the acetylene sludge, the fly ash and the phosphogypsum to generate a large amount of gelled substances, thereby on one hand, the adsorption performance is improved, the adsorption of heavy metals contained in the acetylene sludge can be promoted, the environmental pollution caused by the migration of pollutants is avoided, on the other hand, the invention is beneficial to the compact sludge solidification, the structural strength is higher, the corrosion resistance is better, the solidified sludge can be used in the fields of roadbed engineering and the like, the problem of earthwork shortage is solved, the problem that a large amount of sludge cannot be used is also solved, the utilization rate of wastes is improved, the production cost is reduced, the environmental pollution is reduced, the economic benefit and the environmental protection value are high, and the sustainable development is facilitated.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
The embodiment provides a sludge curing agent, a composite material and a preparation method thereof, wherein the sludge curing agent comprises the following components in parts by mass: 40-50 parts of fly ash, 10-20 parts of carbide slag, 5-10 parts of phosphogypsum, 4-6 parts of water glass and a plurality of parts of water, wherein the fly ash, the carbide slag and the phosphogypsum in a specific ratio are used as raw materials, and a proper amount of water glass is added to be used as an exciting agent, so that volcanic reaction among the fly ash, the fly ash and the phosphogypsum can be excited to generate a large amount of gel substances, and the gel substances have good adsorption performance, so that heavy metals such as Pb, Cd and Zn are adsorbed on the surfaces of the gel substances, and environmental pollution caused by heavy metal migration is avoided. In addition, the fly ash, the carbide slag, the phosphogypsum and the like in the sludge curing agent are all wastes, the sludge can be effectively cured, and the structural compactness, the structural strength and the corrosion resistance of a composite material formed after the sludge is cured are improved, so that the cured sludge can be used in the fields of roadbed engineering and the like, the utilization rate of the wastes is improved, the environmental pollution is reduced, the economic benefit and the environmental protection value are high, and the sustainable development is facilitated. Furthermore, the water content of the water glass and the total mass of water in the sludge curing agent in this embodiment: the total mass of the fly ash, the carbide slag and the phosphogypsum is (0.2-0.3): 1, and the volcanic reaction can be better promoted by controlling the mass ratio of the water content in the sludge curing agent to the powder.
Meanwhile, the silt curing agent of the embodiment can be obtained by firstly mixing and uniformly stirring the fly ash, the carbide slag and the phosphogypsum to obtain powder, then adding the water glass and the water into the powder, and uniformly stirring the mixture.
As a preferred embodiment, the water content of the water glass in the sludge curing agent and the total mass of water are as follows: the total mass of the fly ash, the carbide slag and the phosphogypsum is 0.25: 1.
As a preferable embodiment, the modulus of the water glass in the embodiment is 1.0-2.0, and the modulus of the water glass in the sludge curing agent can be adjusted to help promote the excitation effect and improve the generation efficiency of the gelled substance.
As a preferred embodiment, in this embodiment, the fly ash is a waste generated by calcining coal at a high temperature, and is milled into particles of 700 meshes or more, the quality of the particles reaches more than two levels, the carbide slag is an industrial waste such as acetylene prepared by hydrolyzing carbide, and is crushed, milled and dried to obtain particles of 600 meshes or more, the phosphogypsum is an industrial byproduct generated when phosphate rock is used for producing phosphoric acid, and is washed with water to remove impurities, dried and ground to be powder, and the full contact among the components can be promoted by controlling the particle sizes of the fly ash, the carbide slag and the phosphogypsum, so as to improve the reaction degree and the reaction rate of the volcanic reaction.
As a preferred embodiment, the sludge curing agent comprises the following components in parts by mass: 40 parts of fly ash, 15 parts of carbide slag, 10 parts of phosphogypsum, 5 parts of water glass and 15 parts of water.
The sludge curing agent of the embodiment is prepared by the following steps:
mixing 40-50 parts of fly ash, 10-20 parts of carbide slag and 5-10 parts of phosphogypsum, and uniformly stirring to obtain powder;
adding 4-6 parts of water glass and a plurality of parts of water into the powder, and uniformly stirring to obtain the sludge curing agent.
In order to promote the reaction, the preparation method of the embodiment further comprises adjusting the modulus of the water glass to 1.0-2.0 and standing for 24 hours before adding the powder into the water glass, that is, the embodiment adopts liquid water glass with the modulus of 1.0-2.0, and preferably adopts sodium water glass, that is, the modulus of the water glass is adjusted by adding NaOH.
The mixing and stirring time of the fly ash, the carbide slag and the phosphogypsum is not less than 120s, and the mixing and stirring time of the water glass, the water and the powder is not less than 300 s.
The present invention will be described in further detail with reference to examples.
Example 1
(1) Taking 40 parts of fly ash, 15 parts of carbide slag and 10 parts of phosphogypsum;
(2) putting the raw materials in the step (1) into a stirring pot, and uniformly stirring at normal temperature and normal pressure for 120 s;
(3) 5 parts of prepared water glass with the modulus of 2.0 and standing for 24 hours;
(4) according to the water content of the water glass in the sludge curing agent and the total mass of water: determining the addition amount of water when the total mass of the fly ash, the carbide slag and the phosphogypsum is 0.25: 1;
(5) uniformly mixing and stirring the powder obtained by stirring in the step (2), the water glass prepared in the step (3) and the water obtained in the step (4) to obtain a sludge curing agent, wherein the stirring time is 300 s;
(6) pouring the stirred sludge curing agent into a mould to be compacted and molded; wherein the mould is a triple test mould with the thickness of 40 multiplied by 160 mm;
(7) and sealing the formed sample by using a preservative film, putting the sample into a standard curing box for curing, demolding within 3d, continuously curing to 7d and 28d after demolding, and testing the unconfined compressive strength of the cured sample to 7d and 28d respectively. Wherein, the test adopts a TDW-10-300 type full-automatic cement press to carry out 7d and 28d unconfined compressive strength test
The unconfined compressive strength of the solid body 7d obtained in example 1 was 18.78MPa, and the unconfined compressive strength of 28d was 24.65 MPa.
Example 2
(1) A sludge curing agent was prepared as in example 1.
(2) And (2) adding the sludge curing agent prepared in the step (1) into sludge to be cured, and uniformly stirring for not less than 8min to obtain the composite material.
(3) And (3) pouring the composite material in the step (2) into a mold for sample preparation and molding to obtain a sample, curing the sample at the normal temperature of 20 ℃ for 24 hours, demolding, continuously curing for 7 days and 28 days, and respectively carrying out an unconfined compressive strength test, a splitting test and a durability test (a water stability test, ten dry and wet cycles and ten freeze-thaw cycles). The mold is a 150mm multiplied by 150mm cylinder, the mass fraction of the sludge curing agent is 9%, the sludge is taken from a certain lake in east lake of Wuhan, the water content is 86.18%, the liquid limit is 65.34%, the plastic limit is 30.7%, the content of organic matters is 4.1%, the gravity is 15.8KN/m3, the specific gravity is 2.76, and the pH value is 6.1.
Example 3
(1) Taking 50 parts of fly ash, 20 parts of carbide slag and 9 parts of phosphogypsum;
(2) putting the raw materials in the step (1) into a stirring pot, and uniformly stirring at normal temperature and normal pressure for 120 s;
(3) 4 parts of prepared water glass with the modulus of 1.5 and standing for 24 hours;
(4) according to the water content of the water glass in the sludge curing agent and the total mass of water: determining the addition amount of water when the total mass of the fly ash, the carbide slag and the phosphogypsum is 0.3: 1;
(5) uniformly mixing and stirring the powder obtained by stirring in the step (2), the water glass prepared in the step (3) and the water obtained in the step (4) to obtain a sludge curing agent, wherein the stirring time is 300 s;
(6) adding the sludge curing agent prepared in the step (5) into sludge to be cured, and uniformly stirring for not less than 8min to obtain a composite material; wherein the mass fraction of the sludge curing agent in the sludge is 11%;
(7) and (3) pouring the composite material in the step (6) into a mold for sample preparation and molding to obtain a sample, curing the sample at the normal temperature of 20 ℃ for 24 hours, demolding, continuously curing for 7 days and 28 days, and respectively carrying out an unconfined compressive strength test, a splitting test and a durability test (a water stability test, ten dry and wet cycles and ten freeze-thaw cycles). Wherein, the mould is a cylinder of 150mm multiplied by 150 mm; the sludge is taken from a certain lake in Wuhan Jiangxiao, the water content is 76.36%, the liquid limit is 58.37%, the plastic limit is 26.7%, the organic matter content is 7.95%, the gravity is 11.37KN/m3, the specific gravity is 2.39, and the pH value is 5.9.
Comparative example 1
The process is substantially the same as in example 3, except for 50 parts of fly ash and 20 parts of carbide slag in step (1).
The unconfined compression tests and cleavage tests described above in examples 2-3 and comparative example 1 were tested using a UTm-500 universal testing machine with microcomputer controlled electronics. The water stability test is expressed by a water stability coefficient K, where K is PWater (W)/P,PWater (W)The unconfined compressive strength is measured after the sample is maintained to the day before the age and is soaked in water for 24 hours, and P is the unconfined compressive strength measured after the sample is maintained to the corresponding age. The dry-wet cycle test and the freeze-thaw cycle test are expressed by strength loss rate Pm, wherein Pm is (P0-P1)/P0, P0 is the strength of the sample cured to the corresponding age, and P1 is the strength of the sample cured to the corresponding age after being subjected to dry-wet (freeze-thaw) cycle for six times.
The specific test data are as follows:
in engineering, the unconfined compressive strength of the backfilled sludge solidified soil is far less than 1MPa, and the upper table shows that the later compressive strength of the solidified sludge of the sludge solidifying agent is high, after six times of dry-wet cycles and freeze-thaw cycles, the strength still meets the requirement, the durability is good, and the fields of engineering backfilling and the like can be met.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. The sludge curing agent is characterized by comprising the following components in parts by mass: 40-50 parts of fly ash, 10-20 parts of carbide slag, 5-10 parts of phosphogypsum, 4-6 parts of water glass and a plurality of parts of water; the water content of the water glass in the sludge curing agent and the total mass of water are as follows: the total mass of the fly ash, the carbide slag and the phosphogypsum is (0.2-0.3): 1.
2. The composite material of claim 1, wherein the water content of the water glass in the sludge curing agent and the total mass of water are: the total mass of the fly ash, the carbide slag and the phosphogypsum is 0.25: 1.
3. The composite material of claim 1, wherein the water glass modulus is 1.0 to 2.0.
4. The composite material of claim 1, wherein the fly ash is a particle of 700 mesh or larger, the carbide slag is a particle of 600 mesh or larger, and the phosphogypsum is in a powder form.
5. The composite material of claim 1, wherein the sludge curing agent comprises the following components in parts by mass: 40 parts of fly ash, 15 parts of carbide slag, 10 parts of phosphogypsum, 5 parts of water glass and 15 parts of water.
6. A method for preparing a sludge curing agent according to any one of claims 1 to 5, wherein the method comprises the following steps:
mixing 40-50 parts of fly ash, 10-20 parts of carbide slag and 5-10 parts of phosphogypsum, and uniformly stirring to obtain powder;
adding 4-6 parts of water glass and a plurality of parts of water into the powder, and uniformly stirring to obtain the sludge curing agent; wherein the water content of the water glass in the sludge curing agent and the total mass of water are as follows: the total mass of the fly ash, the carbide slag and the phosphogypsum is (0.2-0.3): 1.
7. The preparation method of claim 6, further comprising adjusting the modulus of the water glass to 1.0-2.0 and standing for 24 hours before adding the water glass into the powder.
8. The method according to claim 6, wherein the modulus of the water glass is adjusted by adding NaOH.
9. The preparation method according to claim 6, characterized in that the mixing time of the fly ash, the carbide slag and the phosphogypsum is not less than 120s, and the mixing time of the water glass, the water and the powder is not less than 300 s.
10. A composite material comprising sludge and the sludge curing agent of any one of claims 1 to 5, wherein the sludge curing agent comprises 8 to 11% by mass of the sludge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210173658.7A CN114573254A (en) | 2022-02-24 | 2022-02-24 | Sludge curing agent, composite material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210173658.7A CN114573254A (en) | 2022-02-24 | 2022-02-24 | Sludge curing agent, composite material and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114573254A true CN114573254A (en) | 2022-06-03 |
Family
ID=81775402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210173658.7A Pending CN114573254A (en) | 2022-02-24 | 2022-02-24 | Sludge curing agent, composite material and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114573254A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115536350A (en) * | 2022-09-21 | 2022-12-30 | 湖北霖熙环保科技有限公司 | Road base layer paving material utilizing cooperation of various solid wastes and preparation method thereof |
| CN116041031A (en) * | 2022-12-30 | 2023-05-02 | 浙大宁波理工学院 | In-situ treatment technology of engineering slag soil with high water content |
| CN116477915A (en) * | 2023-04-10 | 2023-07-25 | 中国科学院武汉岩土力学研究所 | Micro powder curing agent for reinforcing and regenerating sea sludge and preparation method thereof |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1199372A (en) * | 1997-09-26 | 1999-04-13 | Kawasaki Heavy Ind Ltd | Molten fly ash solidifying/stabilizing treatment and device therefor |
| KR20050038230A (en) * | 2003-10-21 | 2005-04-27 | 대한민국 (경상대학교 총장) | Soil solidifier for week stratum containing waste concrete sludge |
| CN102352255A (en) * | 2011-07-20 | 2012-02-15 | 东南大学 | Silt curing agent base on industrial waste materials |
| CN102659294A (en) * | 2012-05-23 | 2012-09-12 | 重庆大学 | Method for solidifying sludge of urban sewage treatment factory by using ardealite, coal ash and carbide slag |
| CN103539423A (en) * | 2013-11-04 | 2014-01-29 | 江苏坤泽科技股份有限公司 | Sludge curing material for comprehensively utilizing phosphorous gypsum |
| CN107500703A (en) * | 2017-07-26 | 2017-12-22 | 四川建筑职业技术学院 | A kind of environmentally friendly light-weight aggregate prepared using mud and preparation method thereof |
| CN111187033A (en) * | 2019-12-27 | 2020-05-22 | 中国地质大学（武汉） | Alkali-activated gangue powder geopolymer cementing material and preparation method thereof |
| CN111943625A (en) * | 2020-08-21 | 2020-11-17 | 河南省交通规划设计研究院股份有限公司 | Soft soil curing agent |
| CN112321262A (en) * | 2020-09-25 | 2021-02-05 | 中交第二航务工程局有限公司 | Low-alkalinity environment-friendly curing agent for river and lake dredging bottom mud and use method thereof |
| CN113735526A (en) * | 2021-09-27 | 2021-12-03 | 北京安科兴业科技股份有限公司 | Soft soil hardening agent for sea area environment |
-
2022
- 2022-02-24 CN CN202210173658.7A patent/CN114573254A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1199372A (en) * | 1997-09-26 | 1999-04-13 | Kawasaki Heavy Ind Ltd | Molten fly ash solidifying/stabilizing treatment and device therefor |
| KR20050038230A (en) * | 2003-10-21 | 2005-04-27 | 대한민국 (경상대학교 총장) | Soil solidifier for week stratum containing waste concrete sludge |
| CN102352255A (en) * | 2011-07-20 | 2012-02-15 | 东南大学 | Silt curing agent base on industrial waste materials |
| CN102659294A (en) * | 2012-05-23 | 2012-09-12 | 重庆大学 | Method for solidifying sludge of urban sewage treatment factory by using ardealite, coal ash and carbide slag |
| CN103539423A (en) * | 2013-11-04 | 2014-01-29 | 江苏坤泽科技股份有限公司 | Sludge curing material for comprehensively utilizing phosphorous gypsum |
| CN107500703A (en) * | 2017-07-26 | 2017-12-22 | 四川建筑职业技术学院 | A kind of environmentally friendly light-weight aggregate prepared using mud and preparation method thereof |
| CN111187033A (en) * | 2019-12-27 | 2020-05-22 | 中国地质大学（武汉） | Alkali-activated gangue powder geopolymer cementing material and preparation method thereof |
| CN111943625A (en) * | 2020-08-21 | 2020-11-17 | 河南省交通规划设计研究院股份有限公司 | Soft soil curing agent |
| CN112321262A (en) * | 2020-09-25 | 2021-02-05 | 中交第二航务工程局有限公司 | Low-alkalinity environment-friendly curing agent for river and lake dredging bottom mud and use method thereof |
| CN113735526A (en) * | 2021-09-27 | 2021-12-03 | 北京安科兴业科技股份有限公司 | Soft soil hardening agent for sea area environment |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115536350A (en) * | 2022-09-21 | 2022-12-30 | 湖北霖熙环保科技有限公司 | Road base layer paving material utilizing cooperation of various solid wastes and preparation method thereof |
| CN116041031A (en) * | 2022-12-30 | 2023-05-02 | 浙大宁波理工学院 | In-situ treatment technology of engineering slag soil with high water content |
| CN116477915A (en) * | 2023-04-10 | 2023-07-25 | 中国科学院武汉岩土力学研究所 | Micro powder curing agent for reinforcing and regenerating sea sludge and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114573254A (en) | Sludge curing agent, composite material and preparation method thereof | |
| EP4129949A1 (en) | Unfired construction material using original state shielding soil and preparation method therefor | |
| CN112301952B (en) | Preparation method of ecological revetment based on dredged mud in-situ solidification | |
| CN104909460B (en) | Porosity denitrogenation dephosphorizing filler for artificial swamp and preparation method thereof | |
| CN107721270B (en) | Method for preparing non-sintered water permeable brick by using municipal sludge | |
| CN113429141B (en) | Cementing material and preparation method and application thereof | |
| CN101805161B (en) | Bonding agent of baking-free bricks prepared from drilling well solid waste materials | |
| CN112194394A (en) | Preparation method of artificial building aggregate based on sludge | |
| CN113213789B (en) | Paving brick prepared based on household garbage incineration fly ash and preparation method thereof | |
| CN111470834A (en) | Preparation method of ecological solidified light soil and ecological solidified light soil | |
| CN110981380B (en) | Concrete for underground pipeline and preparation method thereof | |
| CN102206073A (en) | Slit burning-free bricks and production method thereof | |
| CN107500649A (en) | Unburned dregs brick and preparation method thereof and its application | |
| CN105622023A (en) | Silt curing agent using furnace slags | |
| CN101353232A (en) | Preparation and use method of fly ash based mineral polymer | |
| CN111410496A (en) | Road base material and preparation method thereof | |
| CN109694167A (en) | A kind of mud compound solidification material | |
| CN116639946A (en) | Sludge curing agent and sludge in-situ curing method | |
| CN101265051B (en) | Resin concrete used for manufacturing communication pipeline manhole | |
| CN115142578A (en) | Iron tailing and glutinous rice modified rammed earth wall and preparation method thereof | |
| CN114751664A (en) | Waste incineration fly ash geopolymer and preparation method thereof | |
| CN115010425A (en) | Sludge curing agent for industrial slag combined with waste polystyrene foam particles | |
| CN115432995A (en) | Perforated brick prepared by utilizing engineering waste slurry | |
| CN109279836B (en) | Sea-phase sludge composite curing agent | |
| CN114368928B (en) | Exciting agent for dredging soil high-strength solidification and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220603 |