CN109650844A - A kind of dry preparation process of micropore heat-insulating shield - Google Patents
A kind of dry preparation process of micropore heat-insulating shield Download PDFInfo
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- CN109650844A CN109650844A CN201910139625.9A CN201910139625A CN109650844A CN 109650844 A CN109650844 A CN 109650844A CN 201910139625 A CN201910139625 A CN 201910139625A CN 109650844 A CN109650844 A CN 109650844A
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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
- C04B30/02—Compositions for artificial stone, not containing binders containing fibrous materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
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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
- 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
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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
- 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
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Abstract
The invention discloses a kind of dry preparation process of micropore heat-insulating shield comprising following steps, S1, proportion stock: weighing each component according to the proportion, spare；S2, layering feed intake: each component being successively dosed to high-speed mixer under room temperature；S3, ladder speed stirring: each component is stirred 5-10min under 400-500rpm revolving speed, then adjust revolving speed to 700-900rpm, continues to be stirred 8-10min by starting high-speed mixer；S4, compression moulding: finely dispersed mixture is delivered in the mold of press by pneumatic diaphragm pump, and with the pressing speed of 6-10mm/s, compacting forms core plate under the pressure of 3-4.5MPa；S5, wrapping and encapsulating: laminating layer, encapsulation sizing are wrapped up in core plate surface.Preparation process energy conservation and environmental protection of the present invention, the micropore heat-insulating shield thermal coefficient of preparation is low, heat-resisting quantity is good.
Description
Technical field
The present invention relates to thermal insulation board preparation technical field, in particular to a kind of dry preparation process of micropore heat-insulating shield.
Background technique
Micropore heat-insulating shield belongs to a kind of " nano-porous super thermal insulation material ", mainly uses nano grade inorganic refractory powder,
Under the premise of not adding gel rubber material, high temperature resistant plate is made by dry-forming technique.Its thermal coefficient can be lower than static sky
The thermal coefficient of gas, excellent in the heat-proof quality of high temperature section, especially high temperature linear shrinkage ratio is far below the resistance to material of tradition.
Nanomicroporous material originates from phase early 1990s.It is learned in international material engineering conference in 1992 by the U.S.
Person Hunt.A.J. etc. is proposed with the concept of " super insulating material (Supper insulator) ".Hereafter there is scholar's use successively
" super insulating material (Supper insulator) " or " High Performance Adiabatic material (high performance
Insulating material) " concept.Usual super insulating material refers to: under predetermined use condition, thermal coefficient is lower than
The heat-insulating material of " no convected air (still air) " thermal coefficient.
The Chinese patent that application publication number is CN105347798A discloses a kind of ceramic fibre thermal insulation board, including such as the following group
Point: 3-5 parts of titanium dioxide, 4-9 parts of alumina in Nano level, 2-8 parts of vanadic anhydrides, 5-7 parts of nanometer silicon carbides, 35-45 parts
Micron order silicon carbide, 1-5 parts of dispersing agents, 3-4 parts of zirconium latexes, 4-8 parts of dolomite dusts, 30-40 parts of micron grade aluminum oxides.
The step of preparation process of the prior art are as follows: by proportioned nano-titanium dioxide, alumina in Nano level, five oxidations two
Vanadium, nanometer silicon carbide, micron order silicon carbide, dispersing agent, zirconium latex, dolomite dust and micron grade aluminum oxide stir in blender
It mixes and mixes to uniform；Mold is placed in the slurry pool of stirring, by vacuum pump vacuum adsorption molding, obtains the pottery of dimensionally stable
The wet base of porcelain fiberboard；The wet base of the ceramic fibre of acquisition is placed in dryer and dries 40h, drying temperature is 160-170 DEG C, until
Moisture content is lower than 0.7%；The wet base of ceramic beaverboard after drying is placed in 1250-1350 DEG C and is calcined, 7 DEG C of heating rate/
Min, calcination time 2-3h, then furnace cooling obtain ceramic fibre thermal insulation board.
Although prior art makes ceramic fibre thermal insulation board have preferable heat-resisting quantity and flexural strength, but in reality
It is prepared in the production of border using wet therapy forming process, by the way that powder body material and glue are mixed into slurry, are inhaled through vacuum and consider system
At the wet base of ceramic beaverboard, using drying, sintering, cooling, the heat-insulated board finished product of ceramic fibre is finally prepared.Wet processing
Production can generate more waste water, increase environmental pressure and cost for wastewater treatment, while wet base is dried, is sintered,
It is increased considerably so as to cause the energy consumption of production process.Therefore need to develop a kind of production process energy conservation and environmental protection, thermal coefficient
It is low, the heat-insulating material of good heat insulating.
Summary of the invention
The object of the present invention is to provide a kind of dry preparation process of micropore heat-insulating shield, preparation process environmental protection and energy saving, production
Micropore heat-insulating shield thermal coefficient is low, heat-resisting quantity, and good heat insulating.
Foregoing invention purpose of the invention has the technical scheme that
A kind of dry preparation process of micropore heat-insulating shield comprising the steps of:
S1, proportion stock: weighing each component according to the proportion, spare；
S2, layering feed intake: each component being successively dosed to high-speed mixer under room temperature；
S3, ladder speed stirring: each component is stirred 5-10min under 400-500rpm revolving speed, then adjust by starting high-speed mixer
Revolving speed is saved to 700-900rpm, continues to be stirred 8-10min；
S4, compression moulding: finely dispersed mixture is delivered in the mold of press by pneumatic diaphragm pump, with 6-
Compacting forms core plate under the pressing speed of 10mm/s to the pressure of 3-4.5MPa；
S5, wrapping and encapsulating: laminating layer, encapsulation sizing are wrapped up in core plate surface.
By using above-mentioned technical proposal, the component of different molecular weight is layered according to the ascending sequence of molecular weight and is thrown
Inside material to high-speed mixer, when being stirred, it is smaller with bottom molecular weight from top to bottom that biggish group of branch is measured by the upper-class elements
Component be sufficiently mixed, since the lesser component of molecular weight is not easy to mix from bottom to top when mixing, top layer needs to cover
A part of lesser fumed silica of molecular weight, can make up the deficiency of upper layer fumed silica component in this way, to reach
To the effect for improving each component mixing uniformity；It is stirred mode using the terraced speed of low speed-high speed, can be further improved mixed
Close uniformity；By material after mixing by compacting, core plate is made；Laminating layer is wrapped up in core plate surface, core can be prevented
Plate makes moist and is worn during transportation.
The present invention is further arranged to, which includes the component of following parts by weight: 55-65 parts of gas phase titanium dioxides
Silicon, 20-30 part diatomite, 8-18 parts of ceramic fiber cottons, 8-12 parts of zirconium dioxides, 8-12 parts of silicon carbide, 5-10 parts of titanium dioxide
Titanium.
By using above-mentioned technical proposal, fumed silica has porous structure, fills material as micropore heat-insulating shield
Material, inside have many nanometer stomatas, and along with its bulk density is minimum, material internal will form the gas for being similar to " infinite more "
Hole wall, each air vent wall can generate the effect of insulation board, thus can form the effect for being similar to " infinite more insulation boards ",
Radiant heat transfer effect is greatly reduced to reduce, so as to effectively improve the exhausted effect of micropore heat-insulating shield；Due to nanometer gas
Hole exists, and air molecule is limited in nanometer stomata and can not flow freely, so that elasticity occurs for air molecule and air vent wall
Collision, such material internal structure is similar to vacuum state, can generate " zero convection effect ", so that thermal convection is greatly reduced,
To play adiabatic heat insulating effect；Due to the presence of " infinite more " nano-pore, hot-fluid meeting when being transmitted by material internal solid phase
" infinite long path " effect occurs, to greatly reduce hot-fluid solid phase transmission capacity.
The large specific surface area of fumed silica, superficial attractive forces are strong, have good chemical stability and reinforcing, work
For the packing material of nano-thermal-insulating plate, the compressive resistance of micropore heat-insulating shield can be improved；On the other hand, point of fumed silica
Property and good fluidity are dissipated, when mixing with other powder components, can be improved the uniformity of material mixing, to help to improve micro-
The compressive resistance of hole heat-insulating shield, the homogeneity of insulation capacity and stability.
Diatomite bulk density is small, and homogeneous grain diameter, adsorption capacity is strong, and the uniformity of material mixing, diatomite can be improved
With excellent ductility, higher impact strength can increase the compressive resistance and tearing toughness of micropore heat-insulating shield, simultaneously
Diatomite also has porous structure, can reduce the thermal convection and thermal radiation phenomena of micropore heat-insulating shield, further mention to play
The effect of high plate insulation capacity.
Zirconium dioxide chemical property is stablized, and the property with high-melting-point and low thermal coefficient of expansion, and it is exhausted can to increase micropore
The heat-resisting quantity and thermal stability of hot plate；Ceramic fiber cotton thermal coefficient is low, tenacity of fibre is big, can increase micropore heat-insulating shield
High high-temp stability.
The refractive index of silicon carbide and titanium dioxide is higher, and high-temperature stability is good, and it is effective to can be used as infra-red radiation opacifier
Reduce the heat radiation heat transfer of micropore heat-insulating shield；On the other hand, the thermal coefficient of titanium dioxide is less than the thermal coefficient of silicon carbide,
The two combination can play the heat-conduction effect for reducing infra-red radiation opacifier itself, further increase micropore insulation to reach
The effect of plate insulation capacity.
The present invention is further arranged to, and the silicon carbide is the black silicon carbide of 5-50 μm of particle size range.
By using above-mentioned technical proposal, the toughness of black silicon carbide is preferable, can increase the tensile strength of micropore heat-insulating shield.
Further, the titanium dioxide is the rutile titanium dioxide of 20-50nm particle size range.
By using above-mentioned technical proposal, rutile titanium dioxide hardness is higher, and the titanium dioxide partial size of 20-50nm
It can be filled into nanoporous, can be improved the thermal radiation resistant performance of nanometer micropore thermal insulation board.
Further, in the S2 step, the fumed silica of half parts by weight is put into high-speed mixer, then successively
High-speed mixer is added in the diatomite of total weight part, zirconium dioxide, ceramic fiber cotton, silicon carbide, titanium dioxide, finally again
High-speed mixer is added in the fumed silica of remaining half parts by weight.
By using above-mentioned technical proposal, the component of different molecular weight is layered according to the ascending sequence of molecular weight and is thrown
Inside material to high-speed mixer, when being stirred, it is smaller with bottom molecular weight from top to bottom that biggish group of branch is measured by the upper-class elements
Component be sufficiently mixed, since the lesser component of molecular weight is not easy to mix from bottom to top when mixing, top layer needs to cover
A part of lesser fumed silica of molecular weight, can make up the deficiency of upper layer fumed silica component in this way, to reach
To the effect for improving each component mixing uniformity.
Further, in the S4 step, the pressure maintaining 3-5s under the pressure of 3-4.5MPa.
By using above-mentioned technical proposal, clinker after mixing is formed into core plate, the pressure of 3-4.5MPa by compacting
Strong lower pressure maintaining 3-5s plays the effect for increasing core plate compressive resistance.
Further, in the S3 step, mixed material to surface of material achromic point forms uniform mixture.
By using above-mentioned technical proposal, when the color dot that mixed material surface does not have same component material local accumulation to be formed
When, it is possible to determine that each component is uniformly mixed in material, by there is achromic point that can quickly and effectively determine material admixture.
Further, in the S5 step, the laminating layer of core plate surface is heat shrink films, aluminum plastic film, vacuum diaphragm, glass-fiber-fabric
One of.
By using above-mentioned technical proposal, appoint in core plate surface setting heat shrink films, aluminum plastic film, vacuum diaphragm, glass-fiber-fabric
A kind of laminating layer for material of anticipating can play the role of increasing core plate humidity resistance, also can be to prevent in transport and handling process
Only core plate is worn, to achieve the effect that protect core plate.
In conclusion the invention has the following advantages:
The first, a kind of dry preparation process of micropore heat-insulating shield is disclosed, is divided before mixing according to each component molecular size range
Layer feeds intake, and by way of terraced speed stirring, improves the uniformity of material mixing, improves the pressure resistance of micropore heat-insulating shield to reach
The homogeneity and stability of the performances such as intensity, thermal insulation property；
The second, zirconium dioxide component is added in the application, and with chemical property stabilization, high-melting-point and low thermal coefficient of expansion
Property can increase the heat-resisting quantity and thermal stability of micropore heat-insulating shield；
Infra-red radiation opacifier in third, the application uses silicon carbide, titanium dioxide combination, improves infra-red radiation and hides
While covering effect, the thermal coefficient of infra-red radiation opacifier itself is also reduced；
4th, for the application using ceramic fiber cotton as reinforcing fiber, thermal coefficient is low, tenacity of fibre is big, helps to improve
The compressive resistance and high temperature resistance of micropore heat-insulating shield.
Specific embodiment
Invention is further described in detail with reference to embodiments.
Embodiment one:
A kind of micropore heat-insulating shield dry preparation process, includes the following steps:
S1, proportion stock: 55kg fumed silica, 20kg diatomite, 8kg zirconium dioxide, 8kg ceramic fibre are weighed respectively
Cotton, 8kg silicon carbide, 5kg titanium dioxide；
S2, layering feed intake: the fumed silica of 25.5kg being put into high-speed mixer under room temperature, successively by the titanium dioxide of 8kg
High-speed mixer is added in zirconium, 20kg diatomite, 8kg ceramic fiber cotton, 8kg silicon carbide and 5kg titanium dioxide, finally again will be remaining
High-speed mixer is added in the fumed silica of 25.5kg；
S3, be stirred: starting high-speed mixer, by material stirring mixing 5min under 400rpm revolving speed, then adjust revolving speed to
700rpm continues dispersion mixing 8min；
S4, compression moulding: finely dispersed mixture is delivered in the mold of press by pneumatic diaphragm pump, 6mm/s's
Pressing speed, until 3MPa, and pressure maintaining 3s, form core plate；
S5, wrapping and encapsulating: wrapping up laminating layer in core plate surface, encapsulation sizing, wherein laminating layer be heat shrink films, it is aluminum plastic film, true
One of empty film, glass-fiber-fabric.
Embodiment two:
A kind of micropore heat-insulating shield dry preparation process, includes the following steps:
S1, proportion stock: 57kg fumed silica, 22kg diatomite, 9kg zirconium dioxide, 10kg ceramic fibre are weighed respectively
Cotton, 9kg silicon carbide, 5kg titanium dioxide；
S2, layering feed intake: the fumed silica of 28.5kg being put into high-speed mixer under room temperature, successively by the titanium dioxide of 9kg
High-speed mixer is added in zirconium, 22kg diatomite, 10kg ceramic fiber cotton, 9kg silicon carbide and 5kg titanium dioxide, will finally remain again
High-speed mixer is added in the fumed silica of remaining 28.5kg；
S3, be stirred: starting high-speed mixer, by material stirring mixing 6min under 420rpm revolving speed, then adjust revolving speed to
750rpm continues dispersion mixing 8min；
S4, compression moulding: finely dispersed mixture is delivered in the mold of press by pneumatic diaphragm pump, 7mm/s's
Pressing speed, until 3.5MPa, and pressure maintaining 4s, form core plate；
S5, wrapping and encapsulating: wrapping up laminating layer in core plate surface, encapsulation sizing, wherein laminating layer be heat shrink films, it is aluminum plastic film, true
One of empty film, glass-fiber-fabric.
Embodiment three:
A kind of micropore heat-insulating shield dry preparation process, includes the following steps:
S1, proportion stock: 60kg fumed silica, 25kg diatomite, 10kg zirconium dioxide, 12kg ceramic fibre are weighed respectively
Cotton, 10kg silicon carbide, 5kg titanium dioxide；
S2, layering feed intake: the fumed silica of 30kg being put into high-speed mixer under room temperature, successively by the titanium dioxide of 10kg
High-speed mixer is added in zirconium, 25kg diatomite, 12kg ceramic fiber cotton, 10kg silicon carbide and 5kg titanium dioxide, will finally remain again
High-speed mixer is added in the fumed silica of remaining 30kg；
S3, be stirred: starting high-speed mixer, by material stirring mixing 7min under 450rpm revolving speed, then adjust revolving speed to
800rpm continues dispersion mixing 8min；
S4, compression moulding: finely dispersed mixture is delivered in the mold of press by pneumatic diaphragm pump, 8mm/s's
Pressing speed, until 3.7MPa, and pressure maintaining 5s, form core plate；
S5, wrapping and encapsulating: wrapping up laminating layer in core plate surface, encapsulation sizing, wherein laminating layer be heat shrink films, it is aluminum plastic film, true
One of empty film, glass-fiber-fabric.
Example IV:
A kind of micropore heat-insulating shield dry preparation process, includes the following steps:
S1, proportion stock: 62kg fumed silica, 27kg diatomite, 11kg zirconium dioxide, 15kg ceramic fibre are weighed respectively
Cotton, 11kg silicon carbide, 8kg titanium dioxide；
S2, layering feed intake: the fumed silica of 31kg being put into high-speed mixer under room temperature, successively by the titanium dioxide of 11kg
High-speed mixer is added in zirconium, 27kg diatomite, 15kg ceramic fiber cotton, 11kg silicon carbide and 8kg titanium dioxide, will finally remain again
High-speed mixer is added in the fumed silica of remaining 31kg；
S3, be stirred: starting high-speed mixer, by material stirring mixing 8min under 470rpm revolving speed, then adjust revolving speed to
850rpm continues dispersion mixing 9min；
S4, compression moulding: finely dispersed mixture is delivered in the mold of press by pneumatic diaphragm pump, 9mm/s's
Pressing speed, until 4MPa, and pressure maintaining 5s, form core plate；
S5, wrapping and encapsulating: wrapping up laminating layer in core plate surface, encapsulation sizing, wherein laminating layer be heat shrink films, it is aluminum plastic film, true
One of empty film, glass-fiber-fabric.
Embodiment five:
A kind of micropore heat-insulating shield dry preparation process, includes the following steps:
S1, proportion stock: 65kg fumed silica, 30kg diatomite, 12kg zirconium dioxide, 18kg ceramic fibre are weighed respectively
Cotton, 12kg silicon carbide, 10kg titanium dioxide；
S2, layering feed intake: the fumed silica of 32.5kg being put into high-speed mixer under room temperature, successively by the titanium dioxide of 12kg
High-speed mixer is added in zirconium, 30kg diatomite, 18kg ceramic fiber cotton, 12kg silicon carbide and 10kg titanium dioxide, finally again will
High-speed mixer is added in the fumed silica of remaining 32.5kg；
S3, be stirred: starting high-speed mixer, by material stirring mixing 10min under 500rpm revolving speed, then adjust revolving speed to
900rpm continues dispersion mixing 10min；
S4, compression moulding: finely dispersed mixture is delivered in the mold of press by pneumatic diaphragm pump, 10mm/s's
Pressing speed, until 4.5MPa, and pressure maintaining 5s, form core plate；
S5, wrapping and encapsulating: wrapping up laminating layer in core plate surface, encapsulation sizing, wherein laminating layer be heat shrink films, it is aluminum plastic film, true
One of empty film, glass-fiber-fabric.
Comparative example: to disclose a kind of high-temperature resistant nano micropore heat-insulated for the Chinese invention patent that notification number is CN102838342B
The dry-forming method of plate includes the following steps: using the implementation column 12 in its application documents as control by nano-gas-phase dioxy
SiClx, infra-red radiation opacifier (carbon black), reinforcing fiber (resurrection glass fibre) are successively put into the mass ratio of 100:10:5
In blender, after mixing evenly, mixture is obtained.Mixture is filled into compacting tool set, after the completion of material filling to be mixed, with
The pressure of 0.6MPa suppresses mixture, and compression moulding obtains core plate.
Performance detection:
It takes and prepares each 10 pieces of core plate by the method in implementation column 1-5 and comparative example, and detect the items of core plate in accordance with the following methods
Performance, the core plate test result as made from the same embodiment or comparative example are averaged, and test result is as shown in table 1:
1, permanent line variation coefficient is heated: according to the method in GB/T5486-2008 " inorganic hard insulating product test method "
Core plate to be detected is placed in 800 DEG C of temperature environments, after standing for 24 hours, tests the heating permanent line variation system of each core plate respectively
Number；
2, thermal coefficient: according in YB-T4130-2005 " Refractory Thermal Conductivity test method (water flow flat band method) "
Method tests the thermal coefficient of 800 DEG C of each core plates；
3, it cold crushing strength: is surveyed according to the method in GB/T5072-2008 " refractory material cold crushing strength test method "
Try compressive resistance of each core plate under the deformation of compression 10%.
The performance test results of micropore heat-insulating shield core plate made from each embodiment and comparative example of table 1
As can be seen from Table 1, the thermal coefficient of the micropore heat-insulating shield prepared according to method in embodiment 1-5 is in 0.025W/ (m
K) between -0.040W/ (mK), thermal coefficient very little illustrates that the thermal insulation property of micropore heat-insulating shield is preferable, heating permanent line variation
Coefficient is between 1.3%-1.5%, and respectively less than 2%, illustrate its better heat stability.The micropore insulation prepared from embodiment 1-5
Cold crushing strength is seen when the compression 10% of plate deforms, and relatively, illustrates that its cold crushing strength homogeneity is preferable.
The micropore heat-insulating shield of prior art preparation, the micropore prepared in thermal coefficient and embodiment 1-5 are used in comparative example
The test result of heat-insulating shield heats that permanent Linear change rate is also bigger compared to higher, illustrate using the method system in of the invention
The micropore heat-insulating shield obtained not only can increase thermal insulation property, moreover it is possible to improve the thermal stability under the conditions of applied at elevated temperature, while also simultaneous
Has preferable cold crushing strength.
This specific embodiment is only explanation of the invention, is not limitation of the present invention, those skilled in the art
Member can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but as long as at this
All by the protection of Patent Law in the scope of the claims of invention.
Claims (8)
1. a kind of dry preparation process of micropore heat-insulating shield, it is characterised in that comprise the steps of:
S1, proportion stock: weighing each component according to the proportion, spare；
S2, layering feed intake: each component being successively dosed to high-speed mixer under room temperature；
S3, ladder speed stirring: each component is stirred 5-10min under 400-500rpm revolving speed, then adjust by starting high-speed mixer
Revolving speed is saved to 700-900rpm, continues to be stirred 8-10min；
S4, compression moulding: finely dispersed mixture is delivered in the mold of press by pneumatic diaphragm pump, with 6-
The pressing speed of 10mm/s, compacting forms core plate under the pressure of 3-4.5MPa；
S5, wrapping and encapsulating: laminating layer, encapsulation sizing are wrapped up in core plate surface.
2. a kind of dry preparation process of micropore heat-insulating shield according to claim 1, which is characterized in that the micropore heat-insulating shield
Component including following parts by weight: 55-65 parts of fumed silicas, 20-30 parts of diatomite, 8-18 parts of ceramic fiber cottons, 8-12
Part zirconium dioxide, 8-12 parts of silicon carbide, 5-10 parts of titanium dioxide.
3. a kind of dry preparation process of micropore heat-insulating shield according to claim 2, it is characterised in that: the silicon carbide is
The black silicon carbide of 5-50 μm of particle size range.
4. a kind of dry preparation process of micropore heat-insulating shield according to claim 2, it is characterised in that: the titanium dioxide
For the rutile titanium dioxide of 20-50nm particle size range.
5. a kind of dry preparation process of micropore heat-insulating shield according to claim 1, it is characterised in that: the S2 step
In, the fumed silica of half parts by weight is put into high-speed mixer, then successively by the diatomite of total weight part, titanium dioxide
High-speed mixer is added in zirconium, ceramic fiber cotton, silicon carbide, titanium dioxide, finally again by the gas phase dioxy of remaining half parts by weight
SiClx
High-speed mixer is added.
6. a kind of dry preparation process of micropore heat-insulating shield according to claim 1, it is characterised in that: the S4 step
In, the pressure maintaining 3-5s under the pressure of 3-4.5MPa.
7. a kind of dry preparation process of micropore heat-insulating shield according to claim 1, it is characterised in that: the S3 step
In, mixed material to surface of material achromic point forms uniform mixture.
8. a kind of dry preparation process of micropore heat-insulating shield according to claim 1, it is characterised in that: the S5 step
In, the laminating layer of core plate surface is one of heat shrink films, aluminum plastic film, vacuum diaphragm, glass-fiber-fabric.
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