CN106565197B - A kind of building heat preservation heat-barrier material of flyash airsetting gelatinization preparation - Google Patents

A kind of building heat preservation heat-barrier material of flyash airsetting gelatinization preparation Download PDF

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CN106565197B
CN106565197B CN201610914632.8A CN201610914632A CN106565197B CN 106565197 B CN106565197 B CN 106565197B CN 201610914632 A CN201610914632 A CN 201610914632A CN 106565197 B CN106565197 B CN 106565197B
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flyash
airsetting
barrier material
heat preservation
gel
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CN106565197A (en
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陈庆
曾军堂
陈兵
王镭迪
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GUYUAN KAIYUAN ENERGY SAVING BUILDING MATERIAL CO., LTD.
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GUYUAN KAIYUAN ENERGY SAVING BUILDING MATERIAL Co Ltd
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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
    • C04B30/00—Compositions for artificial stone, not containing binders
    • 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
    • C04B20/023—Chemical treatment
    • 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

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Processing Of Solid Wastes (AREA)
  • Silicon Compounds (AREA)

Abstract

The present invention provides a kind of building heat preservation heat-barrier material of flyash airsetting gelatinization preparation, it is reacted first using flyash with industrial waste acid, to flyash surface preparation, foreign ion is dissolved into industrial waste acid, using high-temperature roasting repeatedly and basification, fine coal gray surface is subjected to gelation, and then connect the main body of flyash, it is connected with each other between powder, forms network skeleton structure, then reacted by constant pressure and dry and obtain aerosil.The present invention is not only at low cost, and flyash gelatinizing-in-situ, and obtained heat preserving and insulating material micropore is evenly distributed, and intensity is big.While solving environmental pollution, more turn waste into wealth, improves the utility value of flyash.

Description

A kind of building heat preservation heat-barrier material of flyash airsetting gelatinization preparation
Technical field
The present invention relates to functional material preparation fields, and in particular to a kind of building heat preservation of flyash airsetting gelatinization preparation every Hot material.
Background technique
Aeroge is solid most light in the world, it is one kind using three-dimensional net structure as bracket, wherein filling gas Decentralized medium has porous condensed state matter.Aerogel material has large specific surface area, porosity height, the coefficient of heat conduction Low, the advantages that density is low, doping adsorption capacity is strong, in the energy, information, environmental protection, medicine, pesticide, metallurgy, catalysis and basic section The fields such as research are learned all to have broad application prospects.The main component of aeroge is earth silicon material, and prepares titanium dioxide The silicon source that silica aerogel uses is usually ethyl orthosilicate, polyethoxy disiloxane, methyltrimethoxysilane, silicon tetrachloride Equal organo-silicon compound, these compounds are expensive.Since the main component of flyash is silica, there is invention special at present Benefit is to use flyash as silicon source, significantly reduces the production cost of aeroge in this way.
Chinese invention patent application number 201110445784.5 discloses a kind of flyash and composite diatomite preparation SiO2 Airsetting gluing method, which prepares the medium temperature mechanical activation of flyash and diatomite, silicon dioxide gel, prepared by wet gel, Mother liquor aging, six step exchange of solvent surface modification, constant pressure and dry steps, obtained SiO2Aeroge with using waterglass as silicon The aerogel material similar performance in source, because using flyash and composite diatomite as cheap silicon source and constant pressure and dry technique, So that production cost is greatly lowered, widely answered so that having in fields such as construction material, insulation, environmental-protection adsorptions Use prospect.However, contain the impurity elements such as iron, copper in the aeroge of preparation due to, there are a large amount of impurity, will lead in flyash, Reduce the heat-insulating property of material.
Chinese invention patent application number 200910010685.7 discloses a kind of using flyash while preparing SiO2Airsetting The method of glue and zeolite.Flyash is first carried out high-temperature activation processing by this method, then carries out hydro-thermal conjunction with sodium hydrate aqueous solution At reaction, waterglass is catalyzed with certain density sulfuric acid, or by solution carry out cation exchange resin exchange after again Base catalysis processing is carried out, SiO is obtained2Gel, with alcohols/alkane solvents and trim,ethylchlorosilane mixed solution to hydrogel into After row solvent replacement/surface modification treatment, SiO is obtained under the conditions of constant pressure and dry2Aeroge.The invention is not only solid waste One new way of the high-effect recycling of object, and be also SiO2One new technique of aeroge and the preparation of zeolite low cost Method.But in the invention it is also the composition without paying attention to flyash, for the aeroge of preparation there are impurity, heat insulation is uneven It is even.
According to above-mentioned analysis, at present using during coal ash for manufacturing prepared silicon dioxide aeroge, not to flyash into The corresponding purification process of row, most of is to obtain silica dioxide gel after directly reacting flyash with alkali, then pass through normal pressure Dry to obtain aerosil, the impurity content that will lead in aerosil in this way is high, leads to the heat-insulated effect of material Fruit is uneven.So needing a kind of side purifying flyash, the method that side obtains silica dioxide gel in situ at present.
Summary of the invention
During using coal ash for manufacturing prepared silicon dioxide aeroge at present, flyash is carried out corresponding pure Change processing, most of is to obtain silica dioxide gel after directly reacting flyash with alkali, then obtains two by constant pressure and dry Silica aerogel, the impurity content that will lead in aerosil in this way is high, causes material heat insulation uneven.This Invention proposes a kind of building heat preservation heat-barrier material of flyash airsetting gelatinization preparation, anti-using flyash and industrial waste acid first It answers, to flyash surface preparation, foreign ion is dissolved into industrial waste acid, at high-temperature roasting repeatedly and alkalization Reason, obtains the flyash of surface gelling, and the main body of flyash still has, and mutually accumulates, and forms skeleton structure, then leads to It crosses constant pressure and dry reaction and obtains aerosil.The present invention is not only at low cost, and flyash gelatinizing-in-situ, obtains Heat preserving and insulating material micropore is evenly distributed, and intensity is big.While solving environmental pollution, more turn waste into wealth, improves flyash Utility value.
The present invention provides a kind of building heat preservation heat-barrier material of flyash airsetting gelatinization preparation, using flyash as former Material, using alternately alkalization-heating method, the control reaction time obtains silica dioxide gel, and the specific method is as follows:
(1) flyash is added in industrial waste acid, the temperature that industrial waste acid is arranged is 30-80 DEG C, mixing speed 100- Under conditions of 500 revs/min, its pH value is adjusted between 3-4, carries out flyash surface preparation, using pre- place is obtained by filtration The mass ratio of the flyash powder of reason, the flyash and industrial waste acid is 0.2-20:1；
(2) the pretreated flyash powder for obtaining step (1) passes through high-temperature roasting, and temperature setting is 300-800 DEG C, The calcination activation time is set as 10-90 minutes, and ball mill mechanical lapping is passed through after the completion of roasting, obtains activating fly ash；
(3) by activating fly ash in proportion at 70-100 DEG C with aqueous slkali hybrid reaction, the reaction time is that 0.5-6 is small When, mixture is filtered after reaction, carries out rapid dilution to filter residue with excessive water, the silicon and aqueous slkali of fine coal gray surface are anti- It answers, gelation occurs, obtain the flyash of surface gelling, the concentration of the aqueous slkali is 0.05-0.2mol/L；
(4) step (2) and (3) are repeated 2-5 times, purifies the silica dioxide gel of fine coal gray surface, obtain surface purifying powder Coal ash gel solution is again heated to 60-70 DEG C, and water-reducing agent is added, stirs evenly, obtains flyash gel, then by the powder Coal ash gel, which is added in alcoholic solvent, to react 5-10 hours, then pulls out and be put into drying box, dry 13- at being 60-70 DEG C in temperature 20 hours, obtain flyash aeroge, the mass ratio of the water-reducing agent and the flyash gel is 1:100-1000.
Preferably, the flyash is appointing in level-one flyash, second class powered coal ash, three-level flyash and superfined flyash It anticipates one kind.
Preferably, the industrial waste acid is one or more of Waste Sulfuric Acid, waste nitric acid, waste hydrochloric acid.
Preferably, the high-temperature roasting is sintered using vacuum Muffle furnace, and the air pressure of 100-1000Pa is kept in sintering process.
Preferably, the ball mill mechanical lapping uses hardened steel ball, stainless steel ball, tungsten-carbide ball, zirconia ceramics ball Any one of, Ball-milling Time is 2-6 hours.
Preferably, the aqueous slkali is any one of ammonium hydroxide, sodium hydroxide, ammonium fluoride or two or more combinations；
The alcoholic solvent is any one of methanol, ethyl alcohol, isopropanol, normal propyl alcohol or two or more combinations.
Preferably, the water-reducing agent is lignosulfonates, naphthalene sulphonate formaldehyde polymer, sulfamate, powder gather Any one in carboxylate, poly carboxylic acid series water reducer.
The present invention proposes a kind of building heat preservation heat-barrier material of flyash airsetting gelatinization preparation, compared with prior art, Prominent feature and excellent effect are:
1, the present invention uses industrial waste acid treated coal ash, removes the impurity of fine coal gray surface, ensure that later period preparation two The homogeneity of ingredients of silica aerogel, micropore size homogeneity.
2, the present invention makes flyash while retaining own form using high-temperature roasting and surface basification repeatedly, Gelation occurs for surface, obtains the skeleton and packing material of aeroge in situ.
3, the present invention uses constant pressure and dry technique, instead of aeroge prepare in the high cost supercritical drying skill that generallys use Art significantly reduces the production cost of aerogel material, provides scale and streaming production model.
4, the flyash and industrial waste acid that the present invention uses prepare aerosil as raw material, put into small, acyclic Border pollution can significantly reduce cost, have significant market application value.
Specific embodiment
In the following, the present invention will be further described in detail by way of specific embodiments, but this should not be interpreted as to the present invention Range be only limitted to example below.Without departing from the idea of the above method of the present invention, according to ordinary skill The various replacements or change that knowledge and customary means are made, should be included in the scope of the present invention.
Embodiment 1
(1) level-one flyash is added in industrial waste sulfuric acid, the temperature that industrial waste sulfuric acid is arranged is 30 DEG C, and mixing speed is Under conditions of 100 revs/min, its pH value is adjusted between 3-4, carries out the surface preparation of level-one flyash, using being obtained by filtration The mass ratio of pretreated flyash powder, level-one flyash and industrial waste sulfuric acid is 1:5；
(2) the pretreated flyash powder for obtaining step (1) passes through high-temperature roasting, is sintered using vacuum Muffle furnace, 100 air pressure is kept in sintering process, temperature setting is 300 DEG C, and the calcination activation time is set as 10 minutes, and roasting passes through after completing Ball mill mechanical lapping is crossed, ball mill mechanical lapping can use hardened steel ball, and Ball-milling Time is 2 hours, obtain activation fine coal Ash；
(3) by activating fly ash in proportion at 70 DEG C with aqueous slkali hybrid reaction, the reaction time is 0.5 hour, reaction Mixture is filtered afterwards, carries out rapid dilution to filter residue with excessive water, the silicon and concentration of fine coal gray surface are 0.05mol/L's Ammonium hydroxide reaction, occurs gelation, obtains the flyash of surface gelling；Activating fly ash is with alkali sodium hydroxide solution mass ratio 1:1.5；
(4) step (2) and (3) 2 times are repeated, the silica dioxide gel of fine coal gray surface is purified, obtain surface purifying fine coal Grey gel solution is again heated to 60 DEG C, and water-reducing agent sodium lignin sulfonate is added, stirs evenly, obtains flyash gel, then will The flyash gel, which is added in alcoholic solvent, to react 5 hours, then pulls out and be put into drying box, and dry 13 is small at being 60 DEG C in temperature When, obtain flyash aeroge, the mass ratio of sodium lignin sulfonate and flyash gel is 1:100.
By the building heat preservation heat-barrier material for the flyash airsetting gelatinization preparation that method in embodiment 1 is prepared, by property It is as shown in table 1 that energy test obtains parameter.
Embodiment 2
(1) second class powered coal ash is added in Industry Waste hydrochloric acid, the temperature of setting Industry Waste hydrochloric acid is 40 DEG C, and mixing speed is Under conditions of 200 revs/min, its pH value is adjusted between 3-4, carries out flyash surface preparation, using pre- place is obtained by filtration The mass ratio of the flyash powder of reason, flyash and industrial waste sulfuric acid is 1:1；
(2) the pretreated flyash powder for obtaining step (1) passes through high-temperature roasting, is sintered using vacuum Muffle furnace, The air pressure of 300Pa is kept in sintering process, temperature setting is 400 DEG C, and the calcination activation time is set as 30 minutes, after the completion of roasting By ball mill mechanical lapping, ball mill mechanical lapping can use stainless steel ball, and Ball-milling Time is 3 hours, obtain activation powder Coal ash；
(3) by activating fly ash in proportion at 80 DEG C with alkali sodium hydroxide solution hybrid reaction, the reaction time is 1.5 small When, mixture is filtered after reaction, carries out rapid dilution to filter residue with excessive water, silicon and the concentration of fine coal gray surface are The alkali sodium hydroxide solution of 0.15mol/L reacts, and gelation occurs, obtains the flyash of surface gelling；Activating fly ash with Alkali sodium hydroxide solution mass ratio is 1:1；
(4) step (2) and (3) 3 times are repeated, the silica dioxide gel of fine coal gray surface is purified, obtain surface purifying fine coal Grey gel solution is again heated to 65 DEG C, and water-reducing agent sulfamic acid sodium is added, stirs evenly, obtains flyash gel, then by institute It states flyash gel and is added in ethyl alcohol and react 6 hours, then pull out and be put into drying box, it is 13 hours dry at being 60 DEG C in temperature, Obtain flyash aeroge, the mass ratio of sulfamic acid sodium and flyash gel is 1:200.
By the building heat preservation heat-barrier material for the flyash airsetting gelatinization preparation that method in embodiment 2 is prepared, by property It is as shown in table 1 that energy test obtains parameter.
Embodiment 3
(1) superfined flyash is added in industrial waste nitric acid, the temperature that waste nitric acid is arranged is 60 DEG C, mixing speed 300 Under conditions of rev/min, its pH value is adjusted between 3-4, progress flyash surface preparation is pretreated using being obtained by filtration The mass ratio of flyash powder, flyash and waste nitric acid is 5:1；
(2) the pretreated flyash powder for obtaining step (1) passes through high-temperature roasting, is sintered using vacuum Muffle furnace, The air pressure of 500Pa is kept in sintering process, temperature setting is 500 DEG C, and the calcination activation time is set as 50 minutes, after the completion of roasting By ball mill mechanical lapping, ball mill mechanical lapping can use tungsten-carbide ball, and Ball-milling Time is 4 hours, obtain activation powder Coal ash；
(3) by activating fly ash in proportion at 90 DEG C with ammonium fluoride solution hybrid reaction, the reaction time is 3 hours, instead Mixture is filtered after answering, and carries out rapid dilution to filter residue with excessive water, the silicon and concentration of fine coal gray surface are 0.17mol/L Ammonium fluoride solution reaction, occur gelation, obtain the flyash of surface gelling；Activating fly ash and alkali sodium hydroxide solution Mass ratio is 3:1；
(4) step (2) and (3) 3 times are repeated, the silica dioxide gel of fine coal gray surface is purified, obtain surface purifying fine coal Grey gel solution is again heated to 65 DEG C, and powder polycarboxylate is added, stirs evenly, obtains flyash gel, then by the powder Coal ash gel, which is added in isopropanol, to react 8 hours, then pulls out and be put into drying box, 15 hours dry at being 65 DEG C in temperature, obtains To flyash aeroge, the mass ratio of powder polycarboxylate and flyash gel is 1:500.
By the building heat preservation heat-barrier material for the flyash airsetting gelatinization preparation that method in embodiment 3 is prepared, by property It is as shown in table 1 that energy test obtains parameter.
Embodiment 4
(1) three-level flyash is added in industrial waste nitric acid, setting waste nitric acid is 70 with the temperature of waste hydrochloric acid mixing spent acid DEG C, under conditions of mixing speed is 400 revs/min, its pH value is adjusted between 3-4, carries out flyash surface preparation, using It is obtained by filtration pretreated flyash powder, the mass ratio of flyash and waste nitric acid is 10:1；
(2) the pretreated flyash powder for obtaining step (1) passes through high-temperature roasting, is sintered using vacuum Muffle furnace, The air pressure of 800Pa is kept in sintering process, temperature setting is 700 DEG C, and the calcination activation time is set as 80 minutes, after the completion of roasting By ball mill mechanical lapping, ball mill mechanical lapping can use zirconia ceramics ball, and Ball-milling Time is 5 hours, be lived Change flyash；
(3) by activating fly ash in proportion at 90 DEG C with ammonium fluoride and ammonium hydroxide mixed solution hybrid reaction, reaction time It is 5 hours, mixture is filtered after reaction, carries out rapid dilution, the silicon and concentration of fine coal gray surface to filter residue with excessive water It is reacted for the ammonium fluoride solution of 0.18mol/L, gelation occurs, obtains the flyash of surface gelling；Activating fly ash and fluorine Change ammonium and ammonium hydroxide mixed solution solution quality ratio is 5:1；
(4) step (2) and (3) 4 times are repeated, the silica dioxide gel of fine coal gray surface is purified, obtain surface purifying fine coal Grey gel solution is again heated to 65 DEG C, and naphthalene sulphonate formaldehyde polymer is added, stirs evenly, obtains flyash gel, then will The flyash gel, which is added in isopropanol and normal propyl alcohol mixed liquor, to react 9 hours, then pulls out and be put into drying box, is in temperature It is 18 hours dry at 65 DEG C, flyash aeroge is obtained, naphthalene sulphonate formaldehyde polymer and the mass ratio of flyash gel are 1: 800。
By the building heat preservation heat-barrier material for the flyash airsetting gelatinization preparation that method in embodiment 4 is prepared, by property It is as shown in table 1 that energy test obtains parameter.
Embodiment 5
(1) by three-level flyash addition industrial waste sulfuric acid, waste nitric acid, waste hydrochloric acid mixed liquor, setting Waste Sulfuric Acid, give up nitre Acid, waste hydrochloric acid mixing spent acid temperature be 80 DEG C, under conditions of mixing speed is 500 revs/min, adjust its pH value between 3-4, Flyash surface preparation is carried out, using pretreated flyash powder, the mass ratio of flyash and waste nitric acid is obtained by filtration For 20:1；
(2) the pretreated flyash powder for obtaining step (1) passes through high-temperature roasting, is sintered using vacuum Muffle furnace, The air pressure of 1000Pa is kept in sintering process, temperature setting is 800 DEG C, and the calcination activation time is set as 90 minutes, and roasting is completed Afterwards by ball mill mechanical lapping, ball mill mechanical lapping uses zirconia ceramics ball, and Ball-milling Time is 6 hours, is activated Flyash；
(3) by activating fly ash in proportion at 90 DEG C with ammonium fluoride, sodium hydroxide and ammonium hydroxide mixed solution hybrid reaction, Reaction time is 6 hours, and mixture is filtered after reaction, carries out rapid dilution to filter residue with excessive water, fine coal gray surface Silicon is reacted with the ammonium fluoride solution that concentration is 0.2mol/L, and gelation occurs, obtains the flyash of surface gelling；Activate fine coal Ash is 5:1 with ammonium fluoride, sodium hydroxide and ammonium hydroxide mixed solution solution quality ratio；
(4) step (2) and (3) 4 times are repeated, the silica dioxide gel of fine coal gray surface is purified, obtain surface purifying fine coal Grey gel solution is again heated to 70 DEG C, and naphthalene sulphonate formaldehyde polymer is added, stirs evenly, obtains flyash gel, then will The flyash gel, which is added in isopropanol and normal propyl alcohol mixed liquor, to react 10 hours, then pulls out and be put into drying box, in temperature It is drying 20 hours at 70 DEG C, obtains flyash aeroge, naphthalene sulphonate formaldehyde polymer and the mass ratio of flyash gel are 1:1000。
By the building heat preservation heat-barrier material for the flyash airsetting gelatinization preparation that method in embodiment 5 is prepared, by property It is as shown in table 1 that energy test obtains parameter.
Table 1
Performance indicator Porosity ml/g Porosity % 100 DEG C of thermal coefficient W/m K 700 DEG C of thermal coefficient W/m K
Embodiment 1 3.2 90 0.012 0.042
Embodiment 2 2.9 89 0.016 0.055
Embodiment 3 3.3 92 0.013 0.052
Embodiment 4 3.1 91 0.014 0.062
Embodiment 5 3.3 90 0.017 0.072

Claims (7)

1. a kind of building heat preservation heat-barrier material of flyash airsetting gelatinization preparation, it is characterised in that using flyash as raw material, Using alternately alkalization-heating method, the control reaction time obtains silica dioxide gel, and the specific method is as follows:
(1) flyash is added in industrial waste acid, the temperature that industrial waste acid is arranged is 30-80 DEG C, mixing speed 100-500 Under conditions of rev/min, its pH value is adjusted between 3-4, progress flyash surface preparation is pretreated using being obtained by filtration The mass ratio of flyash powder, the flyash and industrial waste acid is 0.2-20:1；
(2) the pretreated flyash powder for obtaining step (1) passes through high-temperature roasting, and temperature setting is 300-800 DEG C, roasting Activation time is set as 10-90 minutes, and ball mill mechanical lapping is passed through after the completion of roasting, obtains activating fly ash；
(3) by activating fly ash in proportion at 70-100 DEG C with aqueous slkali hybrid reaction, the reaction time is 0.5-6 hours, instead Mixture is filtered after answering, and carries out rapid dilution to filter residue with excessive water, and the silicon of fine coal gray surface is reacted with aqueous slkali, is occurred Gelation, obtains the flyash of surface gelling, and the concentration of the aqueous slkali is 0.05-0.2mol/L；
(4) step (2) and (3) are repeated 2-5 times, purifies the silica dioxide gel of fine coal gray surface, obtain surface purifying flyash Gel solution is again heated to 60-70 DEG C, and water-reducing agent is added, stirs evenly, obtains flyash gel, then by the flyash Gel, which is added in alcoholic solvent, to react 5-10 hours, then pulls out and be put into drying box, and dry 13-20 is small at being 60-70 DEG C in temperature When, obtain flyash aeroge, the mass ratio of the water-reducing agent and the flyash gel is 1:100-1000.
2. a kind of building heat preservation heat-barrier material of flyash airsetting gelatinization preparation according to claim 1, it is characterised in that: institute Stating flyash is any one in level-one flyash, second class powered coal ash, three-level flyash and superfined flyash.
3. a kind of building heat preservation heat-barrier material of flyash airsetting gelatinization preparation according to claim 1, it is characterised in that: institute Stating industrial waste acid is one or more of Waste Sulfuric Acid, waste nitric acid, waste hydrochloric acid.
4. a kind of building heat preservation heat-barrier material of flyash airsetting gelatinization preparation according to claim 1, it is characterised in that: institute It states high-temperature roasting to be sintered using vacuum Muffle furnace, the air pressure of 100-1000Pa is kept in sintering process.
5. a kind of building heat preservation heat-barrier material of flyash airsetting gelatinization preparation according to claim 1, it is characterised in that: institute Ball mill mechanical lapping is stated using any one of hardened steel ball, stainless steel ball, tungsten-carbide ball, zirconia ceramics ball, when ball milling Between be 2-6 hours.
6. a kind of building heat preservation heat-barrier material of flyash airsetting gelatinization preparation according to claim 1, it is characterised in that: institute Stating aqueous slkali is any one of ammonium hydroxide, sodium hydroxide, ammonium fluoride or two or more combinations；
The alcoholic solvent is any one of methanol, ethyl alcohol, isopropanol, normal propyl alcohol or two or more combinations.
7. a kind of building heat preservation heat-barrier material of flyash airsetting gelatinization preparation according to claim 1, it is characterised in that: institute Water-reducing agent is stated to subtract for lignosulfonates, naphthalene sulphonate formaldehyde polymer, sulfamate, powder polycarboxylate, polycarboxylic-acid Any one in aqua.
CN201610914632.8A 2016-10-20 2016-10-20 A kind of building heat preservation heat-barrier material of flyash airsetting gelatinization preparation Expired - Fee Related CN106565197B (en)

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常压干燥制备SiO2气凝胶及其结构、性能研究;史非;《中国博士学位论文全文数据库 工程科技Ⅰ辑》;20080315(第3期);B020-52

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