CN108910902A - A kind of method of aluminous fly-ash synthesis tobermorite compound insulating material - Google Patents
A kind of method of aluminous fly-ash synthesis tobermorite compound insulating material Download PDFInfo
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- CN108910902A CN108910902A CN201810970502.5A CN201810970502A CN108910902A CN 108910902 A CN108910902 A CN 108910902A CN 201810970502 A CN201810970502 A CN 201810970502A CN 108910902 A CN108910902 A CN 108910902A
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- ash
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- tobermorite
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/20—Silicates
- C01B33/24—Alkaline-earth metal silicates
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- 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
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/16—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay
- C04B35/18—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay rich in aluminium oxide
- C04B35/185—Mullite 3Al2O3-2SiO2
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- 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
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/62204—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products using waste materials or refuse
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- 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
Abstract
The present invention relates to a kind of methods of aluminous fly-ash synthesis tobermorite complex heat-preservation fire proofing material, belong to inorganic heat insulation material field.This method is using aluminous fly-ash as primary raw material, it is levigate after being mixed with calcium oxide or calcium hydroxide, add trace mineral supplement, described two raw materials are uniformly mixed to the laggard Mobile state hydrothermal synthesis reaction of slurrying with water, it is successively filtered and is dried after reaction, obtain mullite and tobermorite complex heat-preservation fire proofing material.Primary raw material aluminous fly-ash of the invention is the solid waste that high alumina coal obtains after the burning of power plant's coal-powder boiler；The present invention greatly reduces the production cost of composite material, raw material sources are extensive, at the same time, the method for preparing mullite and tobermorite complex heat-preservation fire proofing material of the invention is simple, reaction time is short, the solid waste of thermal power plant generation can be dissolved on a large scale, be suitable for industrialization promotion.
Description
Technical field
It is the present invention relates to a kind of method of aluminous fly-ash synthesis tobermorite compound insulating material, in particular to a kind of
Using the method for aluminous fly-ash hydrothermal synthesis mullite and tobermorite type composite heat insulation fireproof plate material, belong to inorganic heat preservation
Material Field.Be mainly used for anti-fire door core board, steamer shifting board, steel construction insulated fire, external wall fireproof heat insulating, in building
The fields such as flue air pipe and electrolytic cell thermal insulation thermal insulation board.
Background technique
China's firepower electrical plant discharges more than 400,000,000 tons of flyash every year, and the transport of aluminous fly-ash and a large amount of hoard produce sternly
The problems such as land occupation of weight and problem of environmental pollution are easy to produce dust pollution, cause underground water heavy metals exceeding standard.Aluminous fly-ash
It is generally rich in aluminium oxide, alumina content is up to 40% or more in the flyash after the burning of Inner Mongolia Autonomous Region major part coalfield,
Especially in Inner Mongolia of China, because of special geologic setting, aluminium oxide is rich in several large-scale coalfields of this area.
By taking Zhungeer coal field as an example, which is up to 26,000,000,000 tons, aluminium oxide in formed flyash after the burning of such coal
Average content is more up to 48-52%, is equivalent to the content of aluminium oxide in medium taste bauxite, for known aluminium oxide in the world
The highest flyash type of content, the potential reserve of such flyash are up to hundred million tons of 70-80.Since such aluminous fly-ash has
The characteristics of density is low, alumina content is high, rich reserves.It is soft rich in a water in Late Paleozoic In The Ordos Basin coal seam and dirt band
The mineral such as aluminium stone and kaolinite, alumina content is up to 50% in generated flyash after burning, with medium grade alumyte
Middle alumina content is suitable, is a kind of very valuable alumina producing raw material.According to statistics, Inner Mongolia of China high-alumina fly
The potential reserve of coal ash is up to 15,000,000,000 tons.Aluminium element silicon in these aluminous fly-ash resources of comprehensive development and utilization, not only favorably
In the protection and development of local environment, the economic value of aluminous fly-ash can also be improved, the circulation with own strategic significance
Economic industry.
Synthesis tobermorite usually requires calcareous raw material and siliceous raw material, under 80~200 DEG C of hydrothermal conditions, when heat preservation
Between day differed from 4 hours to 28.Calcareous raw material is mainly lime or carbide slag, siliceous raw material mainly have quartz, silicon ash, silica gel,
Cement, kaolin, flyash etc..The main chemical reactions of generation are：5CaO+6SiO2+5H2O→Ca5Si6O16(OH)2·4H2O。
Tobermorite is the main mineral constituent of calcium-silicate thermal insulation material, and the thermal insulation material being made from it uses temperature energy
Enough reach 650 DEG C, while tobermorite has the advantages that small bulk density, high high-temp stability and thermal coefficient are low etc. again, thus quilt
It is widely used in the primary raw material as light heat-insulating fire proofing material.Currently, the preparation method of tobermorite is mainly water
Thermal synthesis method, this method are (mainly to provide SiO by calcareous raw material (mainly providing CaO) and siliceous raw material2) by a certain percentage
Mixing, which is placed in autoclave, is reacted to obtain tobermorite, then is molded by addition additive and reinforcing fiber
Tobermorite type calcium silicate insulation is obtained after type is dry.Siliceous raw material employed in this method is to have crystallized mostly
The solid materials such as good quartz sand or expensive white carbon black, and the time required for reaction process is longer, reaction temperature
It is high.Therefore, the method for prior art production tobermorite has the shortcomings that high production cost, time-consuming for production.How to find
A kind of siliceous raw material and calcareous raw material low in cost, the market supply is sufficient, while the production of tobermorite can be shortened again
Time is always people's urgent problem to be solved.
Summary of the invention
The purpose of the present invention is to solve existing aluminous fly-ash there are problems that environmental pollution and the wasting of resources, mentions
For a kind of method of aluminous fly-ash synthesis tobermorite compound insulating material, this method is by the high alumina of industrial solid castoff
Flyash prepares fire proofing material as primary raw material.
The purpose of the present invention is what is realized through the above technical solution.
A kind of method of aluminous fly-ash synthesis tobermorite compound insulating material, includes the following steps：
Step 1: aluminous fly-ash is uniformly mixed with calcareous raw material, then add micro no more than gross mass 3%
Additive, it is levigate to 0.12mm hereinafter, obtaining mixed raw material；The quality of the aluminous fly-ash and calcareous raw material and be total matter
Amount, the quality of aluminous fly-ash are the 70%-85% of gross mass；The quality of calcareous raw material is the 15%-30% of gross mass；
It mixes Step 2: the mixed raw material that step 1 obtains is consolidated mass ratio 5-40 by liquid with water, is carried out after uniform slurrying
Dynamic autoclaved technology reaction, is then successively filtered, washs and is dried, and obtaining principal crystalline phase is that mullite and Tuo Beimo come
The complex heat-preservation fire proofing material of stone.
The present invention does not make considered critical to the source of used raw material aluminous fly-ash, such as can be high alumina coal warp
The solid waste obtained after the burning of power plant's coal-powder boiler.In one embodiment, using the hair of 102249253 B of publication number CN
Quality of alumina content described in bright patent is greater than 40% flyash；In particular, the mineralogical composition master of the aluminous fly-ash
It to be mullite (3Al2O3·2SiO2), mass content > 50% additionally contains a small amount of corundum (Al2O3) < 10%, quartz
(SiO2) other mineralogical compositions and the amorphous glass phase > 30% such as < 5%.
In the method that the present invention utilizes aluminous fly-ash mullite synthesizing and tobermorite complex heat-preservation fire proofing material,
Alumina content 40-50% in the aluminous fly-ash, silica content 35-45%, calcium oxide content 2-6%, iron oxide contain
1-4% is measured, sodium oxide content is less than 1%.
In the method that the present invention utilizes aluminous fly-ash mullite synthesizing and tobermorite complex heat-preservation fire proofing material,
The calcareous raw material can be one or more of quick lime, milk of lime, chemical carbonate-free lime and chemical pure cerium hydroxide calcium.
Inventor is studied for a long period of time discovery, since calcium oxide in tobermorite and oxidation silicon mol ratio are 5:6, crystallization
Reaction temperature produces for reaction 4-28 hours at 140-195 DEG C, two in main amorphous glass phase in aluminous fly-ash
Silica reacts under above-mentioned hydrothermal reaction condition with calcium hydroxide or calcium oxide, by adjusting the calcium silicon mole in material system
Than being 5:6, tobermorite type calcium silicate crystals are produced, to mix with principal crystalline phase mullite original in aluminous fly-ash
Complex heat-preservation fire proofing material is formed, mullite thermal stability at high temperature and tobermorite and the spherical knot of mullite are utilized
Being interweaved for structure reach heat insulation effect with the interspersed pore structure formed, to improve composite material under the high temperature conditions
Stability and insulating power.
In the method that the present invention utilizes aluminous fly-ash mullite synthesizing and tobermorite complex heat-preservation fire proofing material,
The effect of the trace mineral supplement is specification crystal growth direction during Opacity in lens, thus the conjunction of long river rising in Ningxia and flowing into central Shaanxi ratio needed for synthesizing
Lattice whisker, trace mineral supplement can be aluminum sulfate, sodium sulphate, barium sulfate, calcium sulfate, barium chloride, aluminium chloride, one in aluminum nitrate
Kind is several.
In the method that the present invention utilizes aluminous fly-ash mullite synthesizing and tobermorite complex heat-preservation fire proofing material,
The rate-determining steps 2) dynamic autoclaved technology reaction process be from room temperature pass through multiple temperature-gradient method, be finally warming up to 160 DEG C-
230 DEG C, this temperature is end reaction temperature, and the end reaction time is 2-8h.
In the method that the present invention utilizes aluminous fly-ash mullite synthesizing and tobermorite complex heat-preservation fire proofing material,
Step 2) the reaction process heating is temperature-gradient method：If end reaction temperature is not more than 180 degree, 90-100 DEG C of heat preservation
60min, 150 DEG C of heat preservations 30min, end reaction temperature 2-8h；If end reaction temperature be greater than 180 degree, 90-100 DEG C
Keep the temperature 60min, 150 DEG C of heat preservations 30min, 180 DEG C of heat preservations 20min, end reaction temperature 2-8h；Wherein stirred in temperature-rise period
Mixing speed is 100-400rpm；Mixing speed in insulating process is 100-200rpm.
In the method that the present invention utilizes aluminous fly-ash mullite synthesizing and tobermorite complex heat-preservation fire proofing material,
The heating rate of the temperature-gradient method is 1-3 DEG C/min.
In the method that the present invention utilizes aluminous fly-ash mullite synthesizing and tobermorite complex heat-preservation fire proofing material,
The rate-determining steps 2) dynamic autoclaved technology reaction in reaction pressure be 0.61-2.80MPa.
In the method that the present invention utilizes aluminous fly-ash mullite synthesizing and tobermorite complex heat-preservation fire proofing material,
The rate-determining steps 2) in drying temperature be 90-100 DEG C, drying time 4-16h.
Beneficial effect
1, using aluminous fly-ash as primary raw material.Without expending high-grade limestone mine, quartz mine, bauxite and aluminium
The preciousness industrial resources such as alumina, raw material sources are extensive and price is low；On the other hand, the coal price in the aluminous fly-ash place of production is opposite
Coal price in the bauxite place of production is cheap；Therefore mullite and Tuo Beimo can be reduced from cost of material and calcining cost consideration
Carry out the separately synthesized production cost of both stone.
2, in traditional tobermorite synthesis process, since which employs the material systems such as quick lime and quartz sand, institutes
Longer with crystallization process, the hydrothermal synthesis time is longer in autoclave, generally needs 8-16 hours, and it is provided by the invention not
The synthetic method for coming stone and tobermorite composite material only needs 2-8 hours, can greatly improve its production efficiency, and it is raw to reduce unit
Produce cost.
3, raw material sources used by the preparation method of mullite and tobermorite composite material of the present invention extensively, cost
Cheap, preparation process is simple, easily operated, low energy consumption, and discharges without " three wastes ", has good popularization and application foreground.
Detailed description of the invention
Fig. 1 is the XRD spectrum of mullite of the present invention and tobermorite complex heat-preservation fire proofing material.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction in the embodiment of the present invention, to this
Technical solution in inventive embodiments is clearly and completely described, it is clear that described embodiment is that a part of the invention is real
Example is applied, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creation
Property labour under the premise of every other embodiment obtained, shall fall within the protection scope of the present invention.
Embodiment 1
Aluminous fly-ash used by the present embodiment is derived from one power plant of Inner Mongol Hohhot district, and quick lime is derived from Inner Mongol
Ancient Huhehaote City Qingshuihe County, chemical component are shown in Table 1.
The chemical component of table 1 aluminous fly-ash and quick lime
The mullite and tobermorite type complex heat-preservation fire proofing material of the present embodiment are by the above-mentioned high alumina fine coal of 80kg
After the mixing of the above-mentioned quick lime of ash and 20kg, the aluminium chloride of 0.5kg, the aluminum sulfate of 0.3kg and 0.7kg barium chloride are added, is adopted
Its levigate to all granularity is respectively less than 0.12mm with ball mill, is then that 30 water that 3045kg is added mix according to liquid-solid ratio
It being put into autoclave after even, control reaction temperature is 200 DEG C, reaction pressure 1.58MPa, 90-100 DEG C of heat preservation 60min,
150 DEG C of heat preservation 30min, 180 DEG C of heat preservation 20min, 200 DEG C of insulation reaction 5.0h, mixing speed is 300rpm in temperature-rise period, is protected
Mixing speed is 180rpm during temperature, and heating rate is 3 DEG C/min, and after reaction then cooled product is filtered to 90 DEG C
Reaction product can be obtained mullite and tobermorite be multiple at being 95 DEG C in temperature by obtained filter cake after dry 8.0h
Condensation material.
It learns after tested：
1) the moisture content mass percent of mullite and tobermorite composite material obtained above is 4.2%, density
For 304kg/m3, thermal coefficient is 0.069W/ (mK), compression strength 1.24MPa, flexural strength 0.57MPa.
2) as shown in Figure 1, we know in X ray diffracting spectrum：The product obtained after drying is mullite and support
Shellfish mullite composite material.
Embodiment 2
Aluminous fly-ash used by the present embodiment is derived from one power plant of Shanxi Province's Shuozhou City, and quick lime is derived from Shuozhou, shanxi Province one
Quick lime factory, chemical component are shown in Table 2.
The chemical component of table 2 aluminous fly-ash and quick lime
The mullite and tobermorite type complex heat-preservation fire proofing material of the present embodiment are by the above-mentioned high alumina fine coal of 85kg
After the mixing of the above-mentioned quick lime of ash and 15kg, the aluminum nitrate of 0.1kg, the barium sulfate of 0.4kg and 0.7kg sodium sulphate are added, is adopted
Its levigate to all granularity is respectively less than 0.08mm with ball mill, is then that 18 water that 1821.6kg is added mix according to liquid-solid ratio
It is put into autoclave after uniformly, control reaction temperature is 190 DEG C, reaction pressure 1.27MPa, 90-100 DEG C of heat preservation
60min, 150 DEG C of heat preservation 30min, 180 DEG C of heat preservation 20min, 190 DEG C of heat preservation 7.0h, mixing speed is 350rpm in temperature-rise period,
Mixing speed is 150rpm in insulating process, and heating rate is 2 DEG C/min, and cooled product is to 90 DEG C after reaction, then mistake
Reaction product is filtered, at being 95 DEG C in temperature by obtained filter cake after dry 12.0h, mullite and tobermorite can be obtained
Composite material.
It learns after tested：
It learns after tested：Mullite and tobermorite composite material moisture content mass percent obtained above is less than
3.4%, density 365kg/m3, thermal coefficient is 0.074W/ (mK), and compression strength 1.47MPa, flexural strength is
0.68MPa。
X-ray diffraction is carried out to it to test to obtain such as the identical result of embodiment 1.
Embodiment 3
Aluminous fly-ash used by the present embodiment is derived from one power plant of Shanxi Province's Shuozhou City, and the pure quick lime of chemistry is derived from Tianjin
City East China chemical reagent work, chemical component are shown in Table 3.
The chemical component of table 3 aluminous fly-ash and quick lime
The mullite and tobermorite type complex heat-preservation fire proofing material of the present embodiment are by the above-mentioned high alumina fine coal of 89kg
Ash and 11kg above-mentioned quick lime mixing after, add the barium chloride of 0.8kg and the aluminium chloride of 0.4kg, using ball mill by its
Levigate to all granularity is respectively less than 0.10mm, is then put into high pressure after mixing according to the water that liquid-solid ratio is 25 addition 2530kg
In reaction kettle, control reaction temperature is 210 DEG C, and reaction pressure 1.93MPa, 90-100 DEG C of heat preservation 60min, 150 DEG C keep the temperature
30min, 180 DEG C of heat preservation 20min, 210 DEG C of heat preservation 7.0h, mixing speed is 320rpm in temperature-rise period, is stirred in insulating process
Speed is 140rpm, and heating rate is 2 DEG C/min, and after reaction then cooled product filters reaction product to 90 DEG C, by institute
At obtained filter cake is 95 DEG C in temperature after dry 16.0h, mullite and tobermorite composite material can be obtained.
It learns after tested：
It learns after tested：Mullite and tobermorite composite material moisture content mass percent obtained above is less than
2.8%, density 287kg/m3, thermal coefficient is 0.065W/ (mK), and compression strength 1.04MPa, flexural strength is
0.43MPa。
X-ray diffraction is carried out to it to test to obtain such as the identical result of embodiment 1.
Embodiment 4
Aluminous fly-ash used by the present embodiment is derived from one power plant of Inner Mongol Hohhot district, and quick lime is derived from Inner Mongol
Ancient Huhehaote City Qingshuihe County, specific ingredient are same as Example 1.
The mullite and tobermorite type complex heat-preservation fire proofing material of the present embodiment are by the above-mentioned high alumina fine coal of 75kg
After the mixing of the above-mentioned quick lime of ash and 25kg, the aluminum sulfate of 0.6kg, the calcium sulfate of 0.7kg and 0.4kg barium chloride are added, is adopted
Its levigate to all granularity is respectively less than 0.14mm with ball mill, is then that 24 water that 2440.8kg is added mix according to liquid-solid ratio
It is put into autoclave after uniformly, control reaction temperature is 175 DEG C, reaction pressure 0.91MPa, 90-100 DEG C of heat preservation
60min, 150 DEG C of heat preservation 30min, 175 DEG C of insulation reaction 20.0h, mixing speed is 300rpm in temperature-rise period, in insulating process
Mixing speed is 160rpm, and heating rate is 1 DEG C/min, and after reaction then cooled product filters reaction product to 90 DEG C,
At being 95 DEG C in temperature by obtained filter cake after dry 10.0h, mullite and tobermorite composite material can be obtained.
It learns after tested：
1) the moisture content mass percent of mullite and tobermorite composite material obtained above is 4.3%, density
For 342kg/m3, thermal coefficient is 0.075W/ (mK), compression strength 1.07MPa, flexural strength 0.49MPa.
2) as shown in Figure 1, we know in X ray diffracting spectrum：The product obtained after drying is mullite and support
Shellfish mullite composite material.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that：It still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Above-described specific descriptions have carried out further specifically the purpose of invention, technical scheme and beneficial effects
It is bright, it should be understood that the above is only a specific embodiment of the present invention, the protection model being not intended to limit the present invention
It encloses, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should be included in the present invention
Protection scope within.
Claims (10)
1. a kind of method of aluminous fly-ash synthesis tobermorite compound insulating material, it is characterised in that：Include the following steps：
Step 1: aluminous fly-ash is uniformly mixed with calcareous raw material, the micro addition no more than gross mass 3% is then added
Agent, it is levigate to 0.12mm hereinafter, obtaining mixed raw material；The quality of the aluminous fly-ash and calcareous raw material and be gross mass is high
The quality of aluminium powder coal ash is the 70%-85% of gross mass；The quality of calcareous raw material is the 15%-30% of gross mass；
It is mixed Step 2: the mixed raw material that step 1 obtains is consolidated mass ratio 5-40 by liquid with water, the uniform laggard Mobile state of slurrying
Then hydrothermal synthesis reaction is successively filtered and is dried, obtaining principal crystalline phase is the compound of mullite and tobermorite
Heat preservation fireproofing material.
2. a kind of method of aluminous fly-ash synthesis tobermorite compound insulating material as described in claim 1, feature
It is：The calcareous raw material is one or more of quick lime, milk of lime, chemical carbonate-free lime and chemical pure cerium hydroxide calcium.
3. a kind of method of aluminous fly-ash synthesis tobermorite compound insulating material as described in claim 1, feature
It is：The trace mineral supplement is one in aluminum sulfate, sodium sulphate, barium sulfate, calcium sulfate, barium chloride, aluminium chloride and aluminum nitrate
Kind is several.
4. a kind of method of aluminous fly-ash synthesis tobermorite compound insulating material as described in claim 1, feature
It is：Dynamic autoclaved technology reaction process described in step 2 is：From room temperature pass through multiple temperature-gradient method, be finally warming up to 160 DEG C-
230 DEG C, this temperature is end reaction temperature, and the end reaction time in end reaction temperature is 2-8h；Dynamic autoclaved technology
Reaction pressure is 0.61-2.80MPa in reaction.
5. a kind of method of aluminous fly-ash synthesis tobermorite compound insulating material as claimed in claim 4, feature
It is：The temperature-gradient method method is：If end reaction temperature is not more than 180 degree, 90-100 DEG C of heat preservation 60min, 150 DEG C of guarantors
Warm 30min, end reaction temperature 2-8h；If end reaction temperature is greater than 180 degree, 90-100 DEG C of heat preservation 60min, 150
DEG C heat preservation 30min, 180 DEG C of heat preservations 20min, end reaction temperature 2-8h.
6. a kind of method of aluminous fly-ash synthesis tobermorite compound insulating material as claimed in claim 5, feature
It is：Mixing speed is 100-400rpm during the heating；Mixing speed during heat preservation is 100-200rpm.
7. a kind of method of aluminous fly-ash synthesis tobermorite compound insulating material as described in claim 4 or 5, special
Sign is：The heating rate of the temperature-gradient method is 1-3 DEG C/min.
8. a kind of method of aluminous fly-ash synthesis tobermorite compound insulating material as described in claim 1, feature
It is：Dry described in step 2, drying temperature is 90-100 DEG C, drying time 4-16h.
9. a kind of method of aluminous fly-ash synthesis tobermorite compound insulating material as described in claim 1, feature
It is：The aluminous fly-ash is the flyash that quality of alumina content is greater than 40%.
10. a kind of method of aluminous fly-ash synthesis tobermorite compound insulating material as claimed in claim 9, feature
It is：Alumina content 40-50% in the aluminous fly-ash.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112645670A (en) * | 2020-12-29 | 2021-04-13 | 河南安筑装配式防排烟风管有限公司 | Floating bead fireproof heat insulation plate |
| CN113277794A (en) * | 2021-06-17 | 2021-08-20 | 内蒙古工业大学 | Tobo mullite type A-level wall thermal insulation material based on cooperation of carbide slag and silica fume and preparation method thereof |
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| CN104828834A (en) * | 2014-02-12 | 2015-08-12 | 中国科学院过程工程研究所 | Method of preparing tobermorite from fly ash and application thereof |
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