CN115385620A - Method for using waste incineration bottom slag for grouting material - Google Patents
Method for using waste incineration bottom slag for grouting material Download PDFInfo
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- CN115385620A CN115385620A CN202210799729.4A CN202210799729A CN115385620A CN 115385620 A CN115385620 A CN 115385620A CN 202210799729 A CN202210799729 A CN 202210799729A CN 115385620 A CN115385620 A CN 115385620A
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- waste incineration
- bottom slag
- water
- cement
- slag
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- 239000002893 slag Substances 0.000 title claims abstract description 115
- 238000004056 waste incineration Methods 0.000 title claims abstract description 88
- 239000000463 material Substances 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 27
- 239000003513 alkali Substances 0.000 claims abstract description 33
- 239000004568 cement Substances 0.000 claims abstract description 29
- 238000005406 washing Methods 0.000 claims abstract description 20
- 238000007885 magnetic separation Methods 0.000 claims abstract description 9
- 238000001035 drying Methods 0.000 claims abstract description 7
- 229920000876 geopolymer Polymers 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 43
- 239000003638 chemical reducing agent Substances 0.000 claims description 29
- 238000002156 mixing Methods 0.000 claims description 24
- 239000002994 raw material Substances 0.000 claims description 11
- 239000003795 chemical substances by application Substances 0.000 claims description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 239000000843 powder Substances 0.000 claims description 9
- 239000004115 Sodium Silicate Substances 0.000 claims description 8
- 239000010813 municipal solid waste Substances 0.000 claims description 8
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 8
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000002253 acid Substances 0.000 claims description 7
- 239000012190 activator Substances 0.000 claims description 7
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 7
- 239000011707 mineral Substances 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 238000011282 treatment Methods 0.000 claims description 7
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 6
- 239000010881 fly ash Substances 0.000 claims description 6
- 239000011398 Portland cement Substances 0.000 claims description 5
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 claims description 5
- DGVVJWXRCWCCOD-UHFFFAOYSA-N naphthalene;hydrate Chemical compound O.C1=CC=CC2=CC=CC=C21 DGVVJWXRCWCCOD-UHFFFAOYSA-N 0.000 claims description 5
- 229920002401 polyacrylamide Polymers 0.000 claims description 5
- 238000012216 screening Methods 0.000 claims description 5
- -1 polypropylene Polymers 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- 229920005601 base polymer Polymers 0.000 claims description 3
- 239000001913 cellulose Substances 0.000 claims description 3
- 229920002678 cellulose Polymers 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 239000004743 Polypropylene Substances 0.000 claims description 2
- 239000004111 Potassium silicate Substances 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims description 2
- 229920001155 polypropylene Polymers 0.000 claims description 2
- NNHHDJVEYQHLHG-UHFFFAOYSA-N potassium silicate Chemical compound [K+].[K+].[O-][Si]([O-])=O NNHHDJVEYQHLHG-UHFFFAOYSA-N 0.000 claims description 2
- 229910052913 potassium silicate Inorganic materials 0.000 claims description 2
- 235000019353 potassium silicate Nutrition 0.000 claims description 2
- 229910021487 silica fume Inorganic materials 0.000 claims description 2
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 2
- 238000002791 soaking Methods 0.000 claims description 2
- 239000002689 soil Substances 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 7
- 238000011031 large-scale manufacturing process Methods 0.000 abstract description 2
- 238000007873 sieving Methods 0.000 abstract description 2
- 238000005303 weighing Methods 0.000 description 12
- 229910052751 metal Inorganic materials 0.000 description 9
- 239000002184 metal Substances 0.000 description 9
- 238000003756 stirring Methods 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 5
- 150000003863 ammonium salts Chemical class 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 150000003841 chloride salts Chemical class 0.000 description 3
- 239000004567 concrete Substances 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000002956 ash Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000005307 ferromagnetism Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000002203 pretreatment Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000002910 solid waste Substances 0.000 description 2
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000013065 commercial product Substances 0.000 description 1
- 238000009264 composting Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000006148 magnetic separator Substances 0.000 description 1
- 125000001624 naphthyl group Chemical group 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000012360 testing method Methods 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
- 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
- C04B28/02—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 hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
- C04B18/10—Burned or pyrolised refuse
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/026—Comminuting, e.g. by grinding or breaking; Defibrillating fibres other than asbestos
-
- 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
- C04B2111/70—Grouts, e.g. injection mixtures for cables for prestressed concrete
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Civil Engineering (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention belongs to the field of grouting materials, and discloses a method for using waste incineration bottom slag for grouting materials. Firstly, the waste incineration bottom slag is pretreated, and the pretreatment comprises the following steps: magnetic separation, crushing, sieving, alkali washing and drying in the sun. Further explains the application method of the treated refuse incineration slag as a cement-based auxiliary cementing material and in an alkali-activated geopolymer grouting material. The method has the advantages of simple operation method, low cost, universality, easiness in large-scale production, low investment and high benefit, and simultaneously finds a way for resource utilization of the bottom slag from waste incineration, and provides a new idea for high value-added utilization of the bottom slag from urban waste incineration.
Description
Technical Field
The invention belongs to the field of grouting materials, and particularly relates to a preparation method of a grouting material by using household garbage incineration bottom slag capable of being recycled.
Background
The information in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art that is already known to a person of ordinary skill in the art.
Along with the development of social economy and urbanization, the cleaning and transporting quantity of urban domestic garbage is increased year by year, and the garbage harmless treatment mainly comprises the following three types: waste composting, landfill, and waste incineration. The waste incineration power generation can reduce the volume and weight by more than 80% of the waste, and can relieve the urban power supply pressure. The waste incineration products mainly comprise waste incineration bottom slag and fly ash, wherein the fly ash is classified as dangerous solid waste because of containing overproof heavy metals, organic pollutants such as dioxin and the like, and the waste incineration bottom slag is directly utilized as common solid waste. The reuse of the waste incineration bottom slag can directly reduce the landfill cost and can also obtain certain economic benefit.
At present, the waste bottom slag is mainly used for roadbed fillers and baking-free bricks and replaces gravel aggregates, higher utilization value in the waste incineration bottom slag is ignored, for example, the waste incineration bottom slag can be used as an auxiliary cementing material in a cement concrete material due to certain volcanic ash activity, and for example, the bottom slag also has Si and Al elements with higher proportion and can be used as a precursor of an alkali-activated cementing material.
Although the waste incineration bottom slag has the potential of becoming an auxiliary cementing material and an alkali-activated cementing material, the inventor finds that: excessive addition of the metal slag will reduce the macroscopic mechanical properties of the material, and the bottom slag also contains substances which are unfavorable to the application, such as chloride, ammonium salt, residual metal slag and the like. The existence of the chloride salt can seriously accelerate the corrosion of the reinforcing steel bars, so that the concrete cracks, and the ammonium salt and the metal aluminum can generate hydrogen and ammonia in an alkaline environment to damage the hardened body structure of the cement concrete.
Disclosure of Invention
Aiming at the unfavorable substances such as chloride salt, ammonium salt, residual metal slag and the like in the waste incineration bottom slag, the invention aims to provide the method for using the waste incineration bottom slag as the grouting material, which can change waste into valuable, has low cost, simple process, environmental friendliness and industrialization and opens a new idea for the large-scale utilization of the waste incineration bottom slag.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a first aspect of a waste incineration slag cement auxiliary cementing material, which is composed of the following raw materials in parts by weight: 50-70 parts of pretreated waste incineration bottom slag, 30-50 parts of Portland cement, 1 part of water reducing agent and 1 part of water-retaining agent;
the specific treatment method of the pretreated waste incineration bottom slag comprises the following steps: and (3) carrying out magnetic separation, crushing, screening, alkali washing and sun drying on the waste incineration bottom slag to obtain the waste incineration bottom slag.
The invention provides a method for using waste incineration bottom slag as a grouting material, which can remove chloride salt, ammonium salt and partial residual metal slag which are unfavorable for material application on one hand, and provides an idea for large-mixing-amount use of the waste incineration bottom slag on the other hand.
In a second aspect of the present invention, there is provided a method for preparing a cement-assisted cementing material from waste incineration residues, comprising:
uniformly mixing the pretreated garbage bottom slag, the Portland cement, the water reducing agent and the water-retaining agent according to the water-cement ratio of 0.6-0.8 to obtain the water-cement-based garbage.
The invention provides a waste incineration bottom slag-based geopolymer grouting material, which comprises the following raw materials in parts by weight: 50-80 parts of pretreated waste incineration bottom slag, 20-50 parts of a silicon-aluminum raw material, 5-10 parts of an alkali activator and 1 part of a water reducing agent;
the specific treatment method of the pretreated waste incineration bottom slag comprises the following steps: and (3) carrying out magnetic separation, crushing, screening, alkali washing and sun drying on the waste incineration bottom slag to obtain the waste incineration bottom slag.
The fourth aspect of the invention provides a preparation method of a geopolymer grouting material based on waste incineration bottom slag, which comprises the following steps: uniformly mixing the pretreated waste incineration bottom slag, the silicon-aluminum raw material and the alkali activator, adding water according to the water-cement ratio of 0.6-0.8, adding a water reducing agent into the water, and uniformly mixing all the components to obtain the composite material.
The invention has the advantages of
(1) The pretreatment method of the waste incineration bottom slag provided by the invention has the advantages of simple process, low investment cost, industrialization, realization of resource recycling, alleviation of the pressure of landfill land, reduction of carbon emission, contribution to more harmonious urban life and economic, environmental and social benefits.
(2) The invention uses the large-volume waste incineration bottom slag as the grouting material, greatly reduces the material cost under the condition of meeting the use performance of the material, simultaneously finds a way for the resource utilization of the waste incineration bottom slag, and provides a new idea for the high added value utilization of the municipal waste incineration bottom slag.
(3) The operation method is simple, low in cost, universal, easy for large-scale production, low in investment and high in benefit.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
A pretreatment method of waste incineration bottom slag is provided, and comprises the following steps: magnetic separation, crushing, sieving, alkali washing and drying in the sun.
Wherein, the magnetic separation means that most of metals in the waste incineration bottom slag are separated by a magnet and recycled; crushing means that large particles are changed into powder particles by a crusher or a ball mill from the waste incineration bottom slag; the screening refers to crushing the waste incineration bottom slag thoroughly enough to enable the waste incineration bottom slag to pass through a screen with more than 200 meshes so as to improve the reaction activity of the waste incineration bottom slag; the alkali washing is to soak the screened qualified bottom slag in alkali liquor, wherein the PH is more than or equal to 9, the alkali washing is used for removing residual metals (such as aluminum), ammonium salts and other substances which can generate gas to destroy the structure of a hardening body in a hydration reaction, and the liquid-solid ratio is more than 5:1, which is beneficial to washing away chloride ions in the bottom slag; the drying in the sun means that redundant water is removed after alkali washing, so that the ingredients can be conveniently and accurately weighed in the later period.
The method specifically comprises the following steps:
firstly, separating most residual metals with ferromagnetism from bottom slag from a waste incineration power plant by using a strong magnet, recycling, then sending the residual bottom slag into a crusher or a ball mill for crushing treatment, soaking and cleaning the bottom slag passing through a 200-mesh screen by using alkali liquor with the pH value of more than or equal to 9, and carrying out secondary crushing on the bottom slag not passing through the 200-mesh screen, wherein the proportion of liquid to the solid of the bottom slag is ensured to be as large as possible in the alkali washing process, and the minimum proportion is ensured to be more than 5:1, the alkali washing effect is more sufficient, the bottom slag can be dehydrated and dried in the sun after the alkali washing process lasts for more than 1 hour, the bottom slag only needs to be spread out flatly and thin as much as possible in the process, and the bottom slag can be folded for standby after being dried in the sun to a dry state.
The application method of waste incineration bottom slag as cement auxiliary cementing material in grouting material is different from conventional auxiliary cementing materials of fly ash, mineral powder, steel slag, volcanic ash and the like in that the waste incineration bottom slag needs to be pretreated before being utilized. The using method comprises the following steps: putting 50-70 parts of pretreated waste incineration bottom slag and 30-50 parts of portland cement into a mixer to mix at a constant speed for 2 hours, weighing stirring water according to the water-cement ratio of 0.6-0.8, dissolving 1 part of water reducing agent and 1 part of water retaining agent in the water, and then uniformly stirring all the components in a stirrer.
In some embodiments, the water reducer may be a polycarboxylic acid water reducer or a naphthalene based water reducer;
in some embodiments, the water retaining agent may be polyacrylamide, polymethylcellulose, polypropylene-based cellulose, and mixtures thereof.
A method for preparing a base polymer grouting material for incinerating bottom slag of garbage is different from a conventional oligomer grouting material in that the incinerating bottom slag needs to be pretreated before being utilized. The using method comprises the following steps: fully mixing 50-80 parts of pretreated waste incineration bottom slag, 20-50 parts of silicon-aluminum raw materials and 5-10 parts of alkali activator in a mixer for 2 hours, weighing stirring water according to the water-cement ratio of 0.6-0.8, dissolving 1 part of water reducing agent in the water, and then uniformly stirring all the components in a stirrer.
In some embodiments, the alumino-silica raw material is composed of one or more of mineral powder, steel slag, fly ash, silica fume, and higher soil;
in some embodiments, the alkali-activator is comprised of a mixture of one or more of sodium silicate, potassium silicate, sodium hydroxide, potassium hydroxide;
in some embodiments, the water reducer is a naphthalene based water reducer or a polycarboxylic acid water reducer.
The present invention is described in further detail below with reference to specific examples, which should be construed as illustrative rather than restrictive.
In the following examples, the specific method of pretreating the waste incineration bottom slag comprises: firstly, strong magnet separation is carried out on bottom slag from a waste incineration power plant by using a dry-wet magnetic separator, most of residual metal with ferromagnetism is recycled, then the residual bottom slag is sent into a crusher for crushing treatment, the bottom slag which passes through a 200-mesh screen is soaked and cleaned by alkali liquor (NaOH solution) with the pH =11, the bottom slag which can not pass through the 200-mesh screen is subjected to secondary crushing, and the proportion of liquid to bottom slag solid is ensured to be 5 in the alkali washing process: 1, aiming at ensuring the more sufficient alkali washing effect, wherein the alkali washing process lasts for 1 hour, then the bottom slag is dehydrated and dried in the sun, and the bottom slag only needs to be spread out flatly as thin as possible in the process and can be folded for standby after being dried to a dry surface state.
The change in the composition of the waste incineration bottom slag before and after the pretreatment by the above method is shown in table 1 below.
TABLE 1 analysis of the composition of low-slag from incineration of refuse
In the following examples, polycarboxylic acid water-reducing agents and naphthalene water-reducing agents were purchased from Rizhangjun building materials science and technology Co., ltd;
polyacrylamide water retention agents are available from environmental protection technologies ltd, volkong.
The mineral powder is blast furnace slag powder with particle size of 320-360m 2 Per kg; the size fraction of the steel slag is 450-600m 2 Each kg is a commercial product.
Example 1:
weighing 50 parts of pretreated waste incineration bottom slag and 50 parts of sodium silicate cement, mixing the waste incineration bottom slag and the sodium silicate cement in a mixer for 2 hours, weighing a certain amount of mixing water according to a water-cement ratio of 0.7, dissolving 1 part of polycarboxylic acid water reducing agent and 1 part of polyacrylamide water-retaining agent in the water, and uniformly mixing and stirring all the components in a stirrer to obtain the grouting material taking the waste incineration bottom slag as an auxiliary cementing material.
Example 2:
weighing 60 parts of pretreated waste incineration bottom slag and 40 parts of sodium silicate cement, mixing in a mixer for 2 hours, weighing a certain amount of mixing water according to a water-cement ratio of 0.6, dissolving 1 part of polycarboxylic acid water reducer and 1 part of polyacrylamide water-retaining agent in the water, and mixing and stirring all the components uniformly in a stirrer to obtain the base polymer grouting material of the waste incineration bottom slag.
Example 3:
weighing 50 parts of pretreated waste incineration bottom slag, 30 parts of mineral powder, 20 parts of steel slag and 5 parts of sodium silicate, mixing for 2 hours in a mixer, weighing a certain amount of mixing water according to a water-cement ratio of 0.7, dissolving 1 part of naphthalene water reducer in the water, and uniformly mixing and stirring all the components in a stirrer to obtain the grouting material taking the waste incineration bottom slag as an auxiliary cementing material.
Example 4:
weighing 60 parts of pretreated waste incineration bottom slag, 20 parts of mineral powder, 20 parts of steel slag and 6 parts of sodium silicate, mixing for 2 hours in a mixer, weighing a certain amount of mixing water according to a water-cement ratio of 0.7, dissolving 1 part of naphthalene water reducer in the water, and uniformly mixing and stirring all the components in a stirrer to obtain the grouting material taking the waste incineration bottom slag as an auxiliary cementing material.
Example 5:
weighing 50 parts of pretreated waste incineration bottom slag, 20 parts of mineral powder, 20 parts of steel slag, 10 parts of fly ash and 8 parts of sodium silicate, mixing in a mixer for 2 hours, weighing a certain amount of mixing water according to a water-cement ratio of 0.7, dissolving 1 part of naphthalene water reducer in the water, and mixing and stirring all the components in a stirrer uniformly to obtain the grouting material taking the waste incineration bottom slag as an auxiliary cementing material.
Comparative example 1
The difference from the embodiment 1 is that the pretreatment process of the waste incineration bottom slag does not carry out magnetic separation.
Comparative example 2
The difference from example 1 is that alkali washing was not carried out in the pretreatment of the waste incineration bottom slag.
Comparative example 3
The difference from example 1 is that the waste incineration bottom slag was not pretreated.
Comparative example 4
The difference from the embodiment 3 is that the magnetic separation is not carried out in the pretreatment process of the waste incineration bottom slag.
Comparative example 5
The difference from example 3 is that alkali washing was not carried out in the pretreatment of the waste incineration bottom slag.
Comparative example 6
The difference from example 3 is that the waste incineration bottom slag was not pretreated.
The material properties of each example were tested, and the test results are shown in table 2.
Table 2 results of performance test of the grouting materials
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The waste incineration slag used as the cement auxiliary cementing material is characterized by comprising the following raw materials in parts by weight: 50-70 parts of pretreated waste incineration bottom slag, 30-50 parts of Portland cement, 1 part of water reducing agent and 1 part of water-retaining agent;
the specific treatment method of the pretreated waste incineration bottom slag comprises the following steps: and (3) carrying out magnetic separation, crushing, screening, alkali washing and sun drying on the waste incineration bottom slag to obtain the waste incineration bottom slag.
2. The refuse incineration residue as a cement-assisted cementing material according to claim 1, wherein the crushed refuse incineration residue is screened through a 200-mesh screen.
3. The waste incineration residue cement-assisted cementing material of claim 1, wherein the alkali washing comprises the following steps: soaking the screened waste incineration bottom slag in alkali liquor with the pH value of more than or equal to 9 and cleaning.
4. The waste incineration residue cement-assisted cementing material of claim 3, wherein the time of alkali washing is more than 1 hour, and the liquid-solid ratio of the alkali liquor to the screened waste incineration residue is more than 5:1.
5. the waste incineration residue as the cement auxiliary cementing material of claim 1, wherein the water reducing agent is a polycarboxylic acid water reducing agent or a naphthalene water reducing agent.
6. The waste incineration residue as cement-assisted cementing material of claim 1, wherein the water retention agent is at least one of polyacrylamide, polymethyl cellulose and polypropylene-based cellulose.
7. A preparation method of a cement-assisted cementing material made of waste incineration residues is characterized by comprising the following steps:
uniformly mixing the pretreated garbage bottom slag, portland cement, a water reducing agent and a water-retaining agent according to a water-cement ratio of 0.6-0.8 to obtain the water-cement-based garbage.
8. A waste incineration bottom slag base polymer grouting material is characterized by comprising the following raw materials in parts by weight: 50-80 parts of pretreated waste incineration bottom slag, 20-50 parts of a silicon-aluminum raw material, 5-10 parts of an alkali activator and 1 part of a water reducing agent;
the specific treatment method of the pretreated waste incineration bottom slag comprises the following steps: and (3) carrying out magnetic separation, crushing, screening, alkali washing and sun drying on the waste incineration bottom slag to obtain the waste incineration bottom slag.
9. The waste incineration bottom slag based geopolymer grouting material of claim 8, wherein the alumino-silica raw material is formed by mixing one or more of mineral powder, steel slag, fly ash, silica fume and higher soil;
or the alkali activator is formed by mixing one or more of sodium silicate, potassium silicate, sodium hydroxide and potassium hydroxide;
or the water reducing agent is a naphthalene water reducing agent or a polycarboxylic acid water reducing agent.
10. A preparation method of a geopolymer grouting material based on waste incineration bottom slag is characterized by comprising the following steps: uniformly mixing the pretreated waste incineration bottom slag, the silicon-aluminum raw material and the alkali activator, adding water according to the water-cement ratio of 0.6-0.8, adding a water reducing agent into the water, and uniformly mixing all the components to obtain the composite material.
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