CN113277794A - Tobo mullite type A-level wall thermal insulation material based on cooperation of carbide slag and silica fume and preparation method thereof - Google Patents
Tobo mullite type A-level wall thermal insulation material based on cooperation of carbide slag and silica fume and preparation method thereof Download PDFInfo
- Publication number
- CN113277794A CN113277794A CN202110672126.3A CN202110672126A CN113277794A CN 113277794 A CN113277794 A CN 113277794A CN 202110672126 A CN202110672126 A CN 202110672126A CN 113277794 A CN113277794 A CN 113277794A
- Authority
- CN
- China
- Prior art keywords
- carbide slag
- silica fume
- parts
- slurry
- preparation
- 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
- 239000002893 slag Substances 0.000 title claims abstract description 40
- 229910021487 silica fume Inorganic materials 0.000 title claims abstract description 35
- 239000012774 insulation material Substances 0.000 title claims abstract description 20
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 title description 2
- 229910052863 mullite Inorganic materials 0.000 title description 2
- 239000000463 material Substances 0.000 claims abstract description 37
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000002002 slurry Substances 0.000 claims abstract description 28
- 239000002994 raw material Substances 0.000 claims abstract description 26
- MKTRXTLKNXLULX-UHFFFAOYSA-P pentacalcium;dioxido(oxo)silane;hydron;tetrahydrate Chemical compound [H+].[H+].O.O.O.O.[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O MKTRXTLKNXLULX-UHFFFAOYSA-P 0.000 claims abstract description 20
- 239000000843 powder Substances 0.000 claims abstract description 20
- 239000010453 quartz Substances 0.000 claims abstract description 18
- 239000013078 crystal Substances 0.000 claims abstract description 16
- 239000011810 insulating material Substances 0.000 claims abstract description 15
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 14
- 239000012783 reinforcing fiber Substances 0.000 claims abstract description 13
- 229910000278 bentonite Inorganic materials 0.000 claims abstract description 8
- 239000000440 bentonite Substances 0.000 claims abstract description 8
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000006243 chemical reaction Methods 0.000 claims abstract description 8
- 230000018044 dehydration Effects 0.000 claims abstract description 8
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 8
- 238000001035 drying Methods 0.000 claims abstract description 8
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 8
- 239000007787 solid Substances 0.000 claims abstract description 7
- 229910052681 coesite Inorganic materials 0.000 claims abstract description 6
- 229910052906 cristobalite Inorganic materials 0.000 claims abstract description 6
- 239000010881 fly ash Substances 0.000 claims abstract description 6
- 229910052682 stishovite Inorganic materials 0.000 claims abstract description 6
- 238000000967 suction filtration Methods 0.000 claims abstract description 6
- 229910052905 tridymite Inorganic materials 0.000 claims abstract description 6
- 238000000748 compression moulding Methods 0.000 claims abstract description 3
- 238000010438 heat treatment Methods 0.000 claims description 17
- 238000003756 stirring Methods 0.000 claims description 15
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical group [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 12
- 239000000835 fiber Substances 0.000 claims description 12
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium chloride Substances Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims description 9
- 238000000465 moulding Methods 0.000 claims description 8
- 235000019353 potassium silicate Nutrition 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
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 6
- 239000003365 glass fiber Substances 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 5
- CMOAHYOGLLEOGO-UHFFFAOYSA-N oxozirconium;dihydrochloride Chemical compound Cl.Cl.[Zr]=O CMOAHYOGLLEOGO-UHFFFAOYSA-N 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 239000004699 Ultra-high molecular weight polyethylene Substances 0.000 claims description 3
- 229920006231 aramid fiber Polymers 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 229910001388 sodium aluminate Inorganic materials 0.000 claims description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 3
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 2
- 229910052845 zircon Inorganic materials 0.000 claims description 2
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 claims description 2
- 238000003912 environmental pollution Methods 0.000 abstract description 4
- 238000004321 preservation Methods 0.000 abstract description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract description 2
- 238000001027 hydrothermal synthesis Methods 0.000 abstract description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 2
- 239000011707 mineral Substances 0.000 abstract description 2
- 229910052710 silicon Inorganic materials 0.000 abstract description 2
- 239000010703 silicon Substances 0.000 abstract description 2
- 239000002956 ash Substances 0.000 abstract 1
- 230000003068 static effect Effects 0.000 abstract 1
- 238000005265 energy consumption Methods 0.000 description 6
- 229920005830 Polyurethane Foam Polymers 0.000 description 4
- 239000000378 calcium silicate Substances 0.000 description 4
- 229910052918 calcium silicate Inorganic materials 0.000 description 4
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 4
- 239000004795 extruded polystyrene foam Substances 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 239000011496 polyurethane foam Substances 0.000 description 4
- 229910021486 amorphous silicon dioxide Inorganic materials 0.000 description 3
- 239000006260 foam Substances 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 2
- 229910006501 ZrSiO Inorganic materials 0.000 description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 239000000920 calcium hydroxide Substances 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
- 235000011116 calcium hydroxide Nutrition 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000010451 perlite Substances 0.000 description 2
- 235000019362 perlite Nutrition 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920006327 polystyrene foam Polymers 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 229910052726 zirconium Inorganic materials 0.000 description 2
- 206010000369 Accident Diseases 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 1
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- UGGQKDBXXFIWJD-UHFFFAOYSA-N calcium;dihydroxy(oxo)silane;hydrate Chemical compound O.[Ca].O[Si](O)=O UGGQKDBXXFIWJD-UHFFFAOYSA-N 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 1
- 239000011494 foam glass Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- 229910052909 inorganic silicate Inorganic materials 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000011490 mineral wool Substances 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 229910052613 tourmaline Inorganic materials 0.000 description 1
- 239000011032 tourmaline Substances 0.000 description 1
- 229940070527 tourmaline Drugs 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 229910001928 zirconium oxide 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
- 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
- C04B28/021—Ash cements, e.g. fly ash cements ; Cements based on incineration residues, e.g. alkali-activated slags from waste incineration ; Kiln dust 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
- 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
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
-
- 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
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
-
- 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
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
-
- 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
Abstract
The invention discloses a tobermorite type A-level wall thermal insulation material based on cooperation of carbide slag and silica fume and a preparation method thereof. It is characterized by that it uses carbide slag and silicon ash as main raw material, uses one or several of quartz powder, diatomite, bentonite and flyash as auxiliary material and adopts a certain proportion of CaO and SiO2The preparation method comprises the following steps of proportioning according to a molar ratio, doping a small amount of a crystal form control agent, preparing slurry according to a certain liquid-solid ratio, forming fibrous tobermorite minerals with a larger length-diameter ratio through a high-temperature high-pressure hydrothermal synthesis reaction, adding a certain amount of reinforcing fibers, carrying out suction filtration, dehydration, compression molding, and finally carrying out static curing and drying to obtain the tobermorite type A-level wall thermal insulation material. The invention not only can realize high-value utilization of carbide slag and silica fume and reduce environmental pollution caused by the carbide slag and the silica fume, but also can provide an urgent high-efficiency, energy-saving, environment-friendly and non-combustible wall heat-insulating material for the market, and the invention can also provide a new type of environment-friendly and non-combustible wall heat-insulating material for the marketThe fire hazard caused by heat preservation of the traditional organic wall body is avoided.
Description
Technical Field
The invention belongs to the field of heat insulation materials, and particularly relates to a tragantite type A-level wall heat insulation material based on cooperation of carbide slag and silica fume and a preparation method thereof.
Background
With the rapid increase of the housing area of per capita in China, the building energy consumption is parallel to the industrial energy consumption and the traffic energy consumption, and becomes three major energy consumption households of the world. The energy consumption of the buildings in China accounts for about 30% of the total energy consumption of the whole society, the heat loss of the middle and outer protective structures of the buildings is the largest, and the wall bodies of the outer protective structures account for nearly 70%. Therefore, the heat preservation of the outer wall is one of the important measures for saving energy and reducing consumption of the building. The main heat insulating materials on the market are two main types, one is an organic foam clinker material, and the other is an organic foam clinker material, including molded polystyrene foam (EPS), extruded polystyrene foam (XPS), hard polyurethane foam (PU) and hard Phenolic Foam (PF); another class is inorganic silicate materials including rock wool panels, glass wool, foam glass, ceramics and cement, expanded perlite, calcium silicate, expanded perlite and the like. And can be divided into A grade, B1 grade, B2 grade and B3 grade according to the combustion performance of the heat-insulating material.
At present, most of the heat insulation materials for urban civil building walls in China mainly adopt molded polystyrene foam (EPS), extruded polystyrene foam (XPS), hard polyurethane foam (PU) and other organic B2-grade materials. With the use of these insulating materials over large areas, fire accidents continue to continue. Especially, the great loss is brought to the safety of residents and the national economy by several groups of Beijing, Shanghai and Shenyang. Arouse great concern at the national high level. The external thermal insulation material of the external wall has good thermal insulation performance and must also have fire resistance.
The calcium silicate heat insulating material is classified into tobermorite type and xonotlite type, wherein the tobermorite calcium silicate heat insulating material is formed by tobermorite family calcium silicate hydrate crystals (5 CaO.6SiO)2·5H2O) is mainly, and the average density is 170-220 kg/m3The flexural strength is more than 0.3MPa, the thermal conductivity is 0.058-0.100W/(m.k), and the highest heat-resistant temperature is 650 ℃. The composite material is widely applied to heat preservation projects of kilns, equipment, pipelines and houses in the industries of metallurgy, building materials, electric power, chemical engineering and the like. The conventional preparation raw materials comprise siliceous materials and calcareous materials, and the siliceous materials mainly comprise quartzThe powder and the calcareous material mainly comprise slaked lime. The carbide slag is used as waste slag which is obtained by hydrolyzing carbide to obtain acetylene gas and takes calcium hydroxide as a main component, and the silica fume is used as solid waste of amorphous SiO 2-based ultrafine powder generated in the process of smelting iron alloy, so that the yield of the carbide slag and the amorphous SiO 2-based ultrafine powder is huge in China every year, and particularly in northern areas, the utilization rate of the carbide slag is low and the carbide slag and the amorphous SiO 2-based ultrafine powder are piled in large quantities, so that the problem of serious environmental pollution is caused. In recent years, China has great market demand on the A-grade heat-insulating material, particularly, the export quantity is increased rapidly, the added value is high, and the sales area coverage is wide, so that the tourmaline slag and the silica fume can be used as a main calcium source and a silicon source to produce the tobermorite type heat-insulating material, the urgent demand of the market on the A-grade heat-insulating material can be met, the fire caused by using an organic outer wall heat-insulating material for a building is reduced, the high-value utilization of the carbide slag and the silica fume can be realized, and the problem of environmental pollution caused by the carbide slag and the silica fume is solved.
Disclosure of Invention
The invention aims to provide a tobermorite type A-level wall thermal insulation material based on cooperation of carbide slag and silica fume and a preparation method thereof.
The invention adopts the following technical scheme:
the tragantite type A-level wall thermal insulation material based on cooperation of carbide slag and silica fume comprises the following raw materials in parts by weight: 30-45 parts of carbide slag, 35-50 parts of silica fume, 5-15 parts of auxiliary materials and 0.3-1.2 parts of crystal form control agent; the parts by weight are on a dry basis.
Furthermore, the auxiliary materials are one or more of quartz powder, diatomite, bentonite and fly ash.
Further, the crystal form control agent is NaOH or Na2CO3、NaAlO2、AlCl3One or more of zircon quartz, zirconia and zirconium oxychloride.
A preparation method of tobermorite type A-level wall thermal insulation material based on cooperation of carbide slag and silica fume comprises the following steps:
(1) the carbide slag, the silica fume and the auxiliary materials are used as raw materials, and the chemical components and the moisture content of the raw materials are firstly measured. CaO and SiO contained in the raw materials2Preparing materials according to a molar ratio, adding a crystal form control agent, and adding water to prepare slurry 1 from the materials;
(2) adding the slurry 1 prepared in the step (1) into a high-temperature high-pressure reaction kettle, firstly heating to 120-160 ℃ at a heating rate of 3-10 ℃/min, and keeping the temperature for 2-4 h at a stirring speed of 300-400 rpm. Heating to 180-220 ℃ at a heating rate of 1-3 ℃/min, and keeping the temperature for 0.5-3 h under the condition of a stirring speed of 60-260 rpm to prepare slurry 2 mainly containing fibrous tobermorite;
(3) adding reinforcing fibers and water glass into the slurry 2 obtained in the step (2) to obtain slurry 3 containing the reinforcing fibers;
(4) fully and uniformly stirring the slurry 3 prepared in the step (3), injecting into a suction filtration dehydration compression molding machine, carrying under the pressure of 2-5 Mpa for 0.5-3 min, and carrying out filter pressing, dehydration and molding to obtain a molded tobermorite type heat insulation material;
(5) and (3) demolding the tobermorite-type heat-insulating material molded in the step (4), standing at 20-30 ℃ for more than 8 hours, then placing in a tunnel kiln at 50-120 ℃, and drying for 16-24 hours to obtain the wall heat-insulating material.
Furthermore, the CaO content of the used carbide slag needs to be higher than 75 percent. SiO in the silica fume used2The content is higher than 80 percent, and the granularity is smaller than 300 meshes and is larger than 85 percent. SiO of quartz powder used2The content is higher than 90%, and the granularity is smaller than 300 meshes and is larger than 85%. According to CaO and SiO2The mixing amount of the carbide slag, the silica fume and other raw materials of quartz powder, diatomite, bentonite and silica powder is calculated according to the molar ratio of 0.75-0.90. 30-45 parts of carbide slag, 35-50 parts of silica fume and 5-15 parts of other auxiliary materials; the parts by weight are on a dry basis.
Further, the parts of the crystal form control agent in the step (1) are 0.3-1.2; the parts by weight are on a dry basis.
Further, slurry 1 is prepared in the step (1) according to the liquid-solid ratio of 5: 1-15: 1.
Further, in the step (3), the reinforcing fiber is one or more of glass fiber, pulp fiber, aramid fiber, ultra-high molecular weight polyethylene and recycled paper fiber; the adding amount of the reinforcing fiber is 2-5% of the mass of the raw materials, and the weight ratio is calculated on a dry basis.
Further, the adding amount of the water glass in the step (3) is 0.5-3% of the mass of the raw materials, and the modulus of the water glass is 2.0-3.2; the weight ratios are on a dry basis.
Further, the drying in the step (5) enables the moisture content of the material to be controlled below 5%.
Has the advantages that:
the technology for cooperatively synthesizing the tobermorite type A-level wall thermal insulation material by using the carbide slag and the silica fume as main raw materials not only can realize high-value utilization of the carbide slag and the silica fume and reduce the environmental pollution caused by the carbide slag and the silica fume, but also can provide an urgent high-efficiency, energy-saving, environment-friendly and non-combustible wall thermal insulation material for the market, thereby fundamentally avoiding fire caused by the traditional organic wall thermal insulation. The technology also has the advantages of high length-diameter ratio of the synthesized tobermorite fiber, low thermal conductivity coefficient of the prepared thermal insulation material, small density, high strength, good bonding performance with concrete, low cost and the like, and has obvious social, economic and environmental benefits.
Detailed Description
The present invention will be described in further detail with reference to specific examples.
The invention takes carbide slag and silica fume as main raw materials, takes one or more of quartz powder, diatomite, bentonite and fly ash as blending raw materials, and takes certain CaO and SiO as raw materials2Mixing the raw materials according to a molar ratio, and mixing a small amount of NaOH and Na2CO3、NaAlO2、AlCl3Zirconium quartz (ZrSiO)4) Zirconium oxide (ZrO)2) And zirconium oxychloride (ZrOCl)2·8H2One or more of O) is used as a crystal form control agent, water is added to be mixed into slurry according to a certain liquid-solid ratio, a fibrous tobermorite mineral with a larger length-diameter ratio is formed through a series of crystal form transformation and control after a high-temperature high-pressure hydrothermal synthesis reaction, and then a certain amount of reinforcing fiber (one or more of glass fiber, paper pulp fiber, aramid fiber, ultra-high molecular weight polyethylene and recycled fiber) is addedMultiple), suction filtering, dewatering, press forming, and finally curing and drying to obtain the finished product.
The first embodiment is as follows:
carbide slag and silica fume are used as main materials, quartz powder and fly ash are used as auxiliary materials, and the chemical components and the moisture content of the main materials and the auxiliary materials are measured. According to CaO and SiO2The raw materials are prepared according to the molar ratio of 0.83, 43 parts of carbide slag (dry basis, CaO content is 78 percent) and silica fume (SiO)292% of content, 87% of granularity smaller than 300 meshes), 47 parts of quartz powder, 6 parts of fly ash, 3 parts of crystal form control agent, 1 part of (NaOH: AlCl3: zirconium quartz (ZrSiO)4): 3:2:5), preparing the materials into slurry according to the liquid-solid ratio of 12: 1. Then adding the prepared slurry into a high-temperature high-pressure reaction kettle, firstly heating to 135 ℃ at the heating rate of 5 ℃/min, and keeping the temperature for 3.2h at the stirring speed of 330 rpm. Then the temperature is raised to 200 ℃ at the heating rate of 2 ℃/min, and the temperature is kept for 2.5 hours under the condition of the stirring speed of 160rpm, so that the fibrous tobermorite-based slurry with the length-diameter ratio of about 70 is prepared. From the reactor, 2.5% by mass (dry basis) of the starting materials of reinforcing fibers (glass fibers: pulp fibers ═ 6:4) and 1.8% by mass of water glass having a modulus of 2.6 were added to the slurry. Stirring thoroughly, injecting into a suction filtration dehydration press molding machine, holding under 3.5Mpa for 2.5min, press filtering, dehydrating, and molding to obtain a product with thickness of 80 mm. After demoulding, the mixture is kept still for 10 hours at 25 ℃ and then is placed in a tunnel kiln at 120 ℃ for drying for 24 hours. The detected density is 176kg/m3The thermal conductivity coefficient at 50 ℃ is 0.046W/(m.K), the compressive strength is 1.25MPa, the breaking strength is 0.87MPa, the maximum service temperature is 500 ℃, and the fire resistance is class A.
Example two:
carbide slag and silica fume are used as main materials, quartz powder and bentonite are used as auxiliary materials, and the chemical components and the moisture content of the main materials and the auxiliary materials are measured. According to CaO and SiO2The raw materials are prepared according to the molar ratio of 0.87, wherein the parts of carbide slag (dry basis, CaO content is 80 percent) and the parts of silica fume (SiO)290% of content, 87% of granularity smaller than 300 meshes), 48 parts of quartz powder, 5 parts of bentonite, 6 parts of crystal form control agent and 1 part of crystal form control agent (NaAlO)2：AlCl3: zirconium oxychloride (ZrOCl)2·8H2O): 2:2:6) and preparing the materials into slurry according to the liquid-solid ratio of 10: 1. Then adding the prepared slurry into a high-temperature high-pressure reaction kettle, firstly heating to 140 ℃ at the heating rate of 6 ℃/min, and keeping the temperature for 3.0h at the stirring speed of 350 rpm. Then the temperature is raised to 210 ℃ at the heating rate of 3 ℃/min, and the temperature is kept for 2.5 hours under the condition of the stirring speed of 150rpm, so that the fibrous tobermorite-based slurry with the length-diameter ratio of about 70 is prepared. From the reaction kettle, 3.0% by mass (dry basis) of the raw materials of reinforcing fibers (glass fibers: pulp fibers: polyethylene fibers: 5:4:1) and 2.0% of water glass having a modulus of 2.5 were added to the slurry. Stirring thoroughly, injecting into a suction filtration dehydration press molding machine, holding under 4Mpa for 1.5min, press filtering, dehydrating, and molding to obtain a product with thickness of 100 mm. After demoulding, the mixture is kept still for 8 hours at 25 ℃ and then is placed in a tunnel kiln at 120 ℃ for drying for 24 hours. The detected density is 170kg/m3The heat conductivity coefficient at 50 ℃ is 0.045W/(m.K), the compressive strength is 1.23MPa, the breaking strength is 0.88MPa, the maximum service temperature is 490 ℃, and the fire resistance is class A.
Example three:
carbide slag and silica fume are used as main materials, quartz powder and diatomite are used as auxiliary materials, and chemical components and moisture content of the main materials and the auxiliary materials are measured. According to CaO and SiO2The raw materials are prepared according to the molar ratio of 0.90, 42 parts of carbide slag (dry basis, CaO content is 78 percent) and silica fume (SiO)292% of content, 89% of granularity smaller than 300 meshes), 45 parts of quartz powder, 4 parts of diatomite, 8 parts of crystal form control agent and 1 part of NaAlO (sodium aluminum oxide)2：AlCl3: zirconium oxychloride (ZrOCl)2·8H2O): 2:2:6) and preparing the materials into slurry according to the liquid-solid ratio of 15: 1. Then adding the prepared slurry into a high-temperature high-pressure reaction kettle, firstly heating to 140 ℃ at the heating rate of 7 ℃/min, and keeping the temperature for 4.0h at the stirring speed of 350 rpm. Then the temperature is raised to 220 ℃ at the heating rate of 2 ℃/min, and the temperature is kept for 3.0h under the condition of the stirring speed of 150rpm, so that the fibrous tobermorite-based slurry with the length-diameter ratio of about 80 is prepared. The slurry was charged from the autoclave with 5.0% by mass (dry basis) of the raw materials of reinforcing fibers (glass fibers: pulp fibers: polyethylene fibers: 5:4:1) and 2.0% of modulus 3Water glass of claim 0. Stirring thoroughly, injecting into a suction filtration dehydration press molding machine, holding under 4Mpa for 2.5min, press filtering, dehydrating, and molding to obtain a product with thickness of 100 mm. After demoulding, the mixture is kept still for 8 hours at the temperature of 20 ℃ and then is placed in a tunnel kiln at the temperature of 120 ℃ to be dried for 24 hours. The detected density is 165kg/m3The thermal conductivity coefficient at 50 ℃ is 0.043W/(m.K), the compressive strength is 1.15MPa, the breaking strength is 0.98MPa, the maximum service temperature is 490 ℃, and the fire resistance is class A.
Claims (10)
1. The tragantite type A-level wall thermal insulation material based on cooperation of carbide slag and silica fume is characterized by comprising the following raw materials in parts by weight: 30-45 parts of carbide slag, 35-50 parts of silica fume, 5-15 parts of auxiliary materials and 0.3-1.2 parts of crystal form control agent; the parts by weight are on a dry basis.
2. The wall thermal insulation material of claim 1, wherein the auxiliary material is one or more of quartz powder, diatomite, bentonite and fly ash.
3. The wall thermal insulation material of claim 1, wherein the crystal form control agent is NaOH or Na2CO3、NaAlO2、AlCl3One or more of zircon quartz, zirconia and zirconium oxychloride.
4. A preparation method of tobermorite type A-level wall thermal insulation material based on cooperation of carbide slag and silica fume is characterized by comprising the following steps:
(1) the carbide slag, the silica fume and the auxiliary materials are used as raw materials, firstly, the chemical components and the moisture content of the raw materials are measured according to the CaO and the SiO contained in the raw materials2The mixture is mixed according to the molar ratio, a crystal form control agent is added, and the materials are prepared into slurry 1 by adding water;
(2) adding the slurry 1 prepared in the step (1) into a high-temperature high-pressure reaction kettle, firstly heating to 120-160 ℃ at a heating rate of 3-10 ℃/min, and keeping the temperature for 2-4 h at a stirring speed of 300-400 rpm; heating to 180-220 ℃ at a heating rate of 1-3 ℃/min, and keeping the temperature for 0.5-3 h under the condition of a stirring speed of 60-260 rpm to prepare slurry 2 mainly containing fibrous tobermorite;
(3) adding reinforcing fibers and water glass into the slurry 2 obtained in the step (2) to obtain slurry 3 containing the reinforcing fibers;
(4) fully and uniformly stirring the slurry 3 prepared in the step (3), injecting into a suction filtration dehydration compression molding machine, carrying under the pressure of 2-5 Mpa for 0.5-3 min, and carrying out filter pressing, dehydration and molding to obtain a molded tobermorite type heat insulation material;
(5) and (3) demolding the tobermorite-type heat-insulating material molded in the step (4), standing at 20-30 ℃ for more than 8 hours, then placing in a tunnel kiln at 50-120 ℃, and drying for 16-24 hours to obtain the wall heat-insulating material.
5. The method according to claim 4, wherein the content of CaO in the carbide slag used in the step (1) is higher than 75%, and SiO in the silica fume used in the step (1)2The content is higher than 80 percent, and the content with the granularity smaller than 300 meshes is higher than 85 percent; SiO of quartz powder used2The content is higher than 90%, the granularity is smaller than 300 meshes and is larger than 85%; according to CaO and SiO2The mixing amount of the carbide slag, the silica fume and other raw materials of quartz powder, diatomite, bentonite and silica powder is calculated according to the molar ratio of 0.75-0.90; 30-45 parts of carbide slag, 35-50 parts of silica fume and 5-15 parts of other auxiliary materials; the parts by weight are on a dry basis.
6. The preparation method according to claim 4, wherein in the step (1), the crystal form control agent is used in an amount of 0.3-1.2 parts; the weight ratios are on a dry basis.
7. The preparation method according to claim 4, wherein slurry 1 is prepared in the step (1) according to a liquid-solid ratio of 5: 1-15: 1.
8. The preparation method according to claim 4, wherein the reinforcing fiber in the step (3) is one or more of glass fiber, pulp fiber, aramid fiber, ultra-high molecular weight polyethylene and recycled paper fiber; the adding amount of the reinforcing fiber is 2-5% of the mass of the raw materials, and the weight ratio is calculated on a dry basis.
9. The preparation method according to claim 4, wherein the amount of the water glass added in the step (3) is 0.5-3% of the mass of the raw material, and the modulus of the water glass is 2.0-3.2; the weight ratios are on a dry basis.
10. The method according to claim 4, wherein the drying in the step (5) is performed to control the moisture content of the material to be 5% or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110672126.3A CN113277794A (en) | 2021-06-17 | 2021-06-17 | Tobo mullite type A-level wall thermal insulation material based on cooperation of carbide slag and silica fume and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110672126.3A CN113277794A (en) | 2021-06-17 | 2021-06-17 | Tobo mullite type A-level wall thermal insulation material based on cooperation of carbide slag and silica fume and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113277794A true CN113277794A (en) | 2021-08-20 |
Family
ID=77284838
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110672126.3A Pending CN113277794A (en) | 2021-06-17 | 2021-06-17 | Tobo mullite type A-level wall thermal insulation material based on cooperation of carbide slag and silica fume and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113277794A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1307083A (en) * | 2000-01-24 | 2001-08-08 | 莱州明发隔热材料有限公司 | Method for mfg. thermal insulation and fireproof calcium silicate material |
| CN1958499A (en) * | 2006-09-28 | 2007-05-09 | 贵州省遵义碱厂 | Heat preservation insulator of xonaltite, and preparation method |
| CN103553501A (en) * | 2013-11-05 | 2014-02-05 | 大唐国际发电股份有限公司高铝煤炭资源开发利用研发中心 | Preparation method of calcium silicate insulation material |
| CN106187052A (en) * | 2016-07-27 | 2016-12-07 | 大唐国际发电股份有限公司高铝煤炭资源开发利用研发中心 | A kind of tobermorite type adiabator utilizing calcium silicate slag to prepare and preparation method |
| CN106966402A (en) * | 2017-03-24 | 2017-07-21 | 大唐国际发电股份有限公司高铝煤炭资源开发利用研发中心 | The method that tobermorite is prepared using calcium silicate slag |
| CN108910902A (en) * | 2018-08-24 | 2018-11-30 | 内蒙古中建亚太建材科技有限公司 | A kind of method of aluminous fly-ash synthesis tobermorite compound insulating material |
-
2021
- 2021-06-17 CN CN202110672126.3A patent/CN113277794A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1307083A (en) * | 2000-01-24 | 2001-08-08 | 莱州明发隔热材料有限公司 | Method for mfg. thermal insulation and fireproof calcium silicate material |
| CN1958499A (en) * | 2006-09-28 | 2007-05-09 | 贵州省遵义碱厂 | Heat preservation insulator of xonaltite, and preparation method |
| CN103553501A (en) * | 2013-11-05 | 2014-02-05 | 大唐国际发电股份有限公司高铝煤炭资源开发利用研发中心 | Preparation method of calcium silicate insulation material |
| CN106187052A (en) * | 2016-07-27 | 2016-12-07 | 大唐国际发电股份有限公司高铝煤炭资源开发利用研发中心 | A kind of tobermorite type adiabator utilizing calcium silicate slag to prepare and preparation method |
| CN106966402A (en) * | 2017-03-24 | 2017-07-21 | 大唐国际发电股份有限公司高铝煤炭资源开发利用研发中心 | The method that tobermorite is prepared using calcium silicate slag |
| CN108910902A (en) * | 2018-08-24 | 2018-11-30 | 内蒙古中建亚太建材科技有限公司 | A kind of method of aluminous fly-ash synthesis tobermorite compound insulating material |
Non-Patent Citations (3)
| Title |
|---|
| 杨志杰: ""煤基固废协同利用制备硅酸钙板的试验研究"", 《混凝土与水泥制品》 * |
| 罗民华, 中国建材工业出版社 * |
| 苗福生: ""利用固体废弃物制备硅酸钙绝热材料综述"", 《宁夏工程技术》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100586890C (en) | Heat preservation insulator of xonotlite, and preparation method | |
| CN101608484B (en) | Phosphorous slag autoclave aerated concrete building block and preparation method thereof | |
| CN101508543B (en) | Mortar special for light insulating brick construction and method of producing the same | |
| CN102219415B (en) | Light sand without burning and preparation method thereof | |
| CN104193263B (en) | Utilize construction waste to prepare the method for environment-friendly insulating building block | |
| CN102126866B (en) | A kind of high-purity silica refractory material and production technique thereof | |
| CN102643070A (en) | Ceramsite heat-preservation building block using non-calcined desulfurized gypsum as main cementing material and preparation method thereof | |
| CN114044665B (en) | Assembled aerated concrete plate prepared from garbage bottom slag and preparation method thereof | |
| CN101979357A (en) | Calcium silicate material prepared from river mud and preparation method thereof | |
| CN111285655A (en) | Aerated concrete preparation method based on solid waste resource utilization | |
| CN113354314B (en) | High-activity cementing material based on engineering muck | |
| CN102168457A (en) | Fireproof slag calcium silicon composite outer insulation board for exterior walls | |
| CN111925165A (en) | Building waste concrete block and preparation method thereof | |
| CN102745959B (en) | Ceramsite self-insulation building block and preparation method | |
| CN101863068B (en) | Method for producing autoclaved brick by residue of aluminum-extracted pulverized fuel ash | |
| CN112408929A (en) | Environment-friendly calcium silicate board produced based on slag powder and preparation method thereof | |
| CN113929425B (en) | Building block and preparation method thereof | |
| CN113816718B (en) | Light wall board for building and preparation method thereof | |
| CN113277794A (en) | Tobo mullite type A-level wall thermal insulation material based on cooperation of carbide slag and silica fume and preparation method thereof | |
| CN104987019A (en) | Lightweight fly ash-based sodium aluminum silicate plate and preparation method thereof | |
| CN101725209A (en) | Large brick and production method thereof | |
| CN115259823A (en) | Lightweight high-strength low-thermal conductivity aerated concrete and preparation method thereof | |
| CN114735991A (en) | Calcium silicate board prepared by aggregate industrial solid waste and cement rotary kiln waste heat and preparation method | |
| CN105693148B (en) | A kind of light-weight building insulation blocks and preparation method thereof | |
| CN106495707A (en) | Enhanced refractory brick of a kind of titanate lamella and preparation method 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: 20210820 |