CN108252163A - The manufacturing equipment and preparation method of rigid thermal insulation tile green body - Google Patents
The manufacturing equipment and preparation method of rigid thermal insulation tile green body Download PDFInfo
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- CN108252163A CN108252163A CN201810123041.8A CN201810123041A CN108252163A CN 108252163 A CN108252163 A CN 108252163A CN 201810123041 A CN201810123041 A CN 201810123041A CN 108252163 A CN108252163 A CN 108252163A
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- 238000009413 insulation Methods 0.000 title claims abstract description 40
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 7
- 238000002360 preparation method Methods 0.000 title claims description 10
- 239000002002 slurry Substances 0.000 claims abstract description 123
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 52
- 239000007788 liquid Substances 0.000 claims abstract description 50
- 238000000967 suction filtration Methods 0.000 claims abstract description 49
- 238000000034 method Methods 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 15
- 239000000835 fiber Substances 0.000 claims description 54
- 238000001914 filtration Methods 0.000 claims description 33
- 239000000919 ceramic Substances 0.000 claims description 24
- 239000012528 membrane Substances 0.000 claims description 18
- 238000009792 diffusion process Methods 0.000 claims description 14
- 239000008367 deionised water Substances 0.000 claims description 10
- 229910021641 deionized water Inorganic materials 0.000 claims description 10
- 239000010453 quartz Substances 0.000 claims description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 9
- 238000005245 sintering Methods 0.000 claims description 9
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical group [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 8
- 239000000908 ammonium hydroxide Substances 0.000 claims description 8
- 239000000654 additive Substances 0.000 claims description 6
- 230000000996 additive effect Effects 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 239000003002 pH adjusting agent Substances 0.000 claims description 6
- 238000005086 pumping Methods 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 229910052582 BN Inorganic materials 0.000 claims description 4
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 4
- 229910052580 B4C Inorganic materials 0.000 claims description 3
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 claims description 3
- 230000005587 bubbling Effects 0.000 claims description 2
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 2
- 238000010079 rubber tapping Methods 0.000 claims description 2
- 239000013049 sediment Substances 0.000 claims description 2
- 229910001928 zirconium oxide Inorganic materials 0.000 claims description 2
- 239000011490 mineral wool Substances 0.000 claims 1
- 239000002699 waste material Substances 0.000 abstract description 4
- 230000008676 import Effects 0.000 abstract 1
- 230000008569 process Effects 0.000 description 9
- 239000007787 solid Substances 0.000 description 9
- 235000012489 doughnuts Nutrition 0.000 description 5
- 239000012510 hollow fiber Substances 0.000 description 5
- 101100298222 Caenorhabditis elegans pot-1 gene Proteins 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000004062 sedimentation Methods 0.000 description 4
- 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 description 3
- 239000004744 fabric Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 229910052863 mullite Inorganic materials 0.000 description 3
- -1 polyethylene Polymers 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000004695 Polyether sulfone Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 229920002472 Starch Polymers 0.000 description 2
- 229910052796 boron Inorganic materials 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001471 micro-filtration Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229920002239 polyacrylonitrile Polymers 0.000 description 2
- 229920006393 polyether sulfone Polymers 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 235000019698 starch Nutrition 0.000 description 2
- 239000008107 starch Substances 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000002033 PVDF binder Substances 0.000 description 1
- 238000002679 ablation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000004964 aerogel Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21J—FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE
- D21J3/00—Manufacture of articles by pressing wet fibre pulp, or papier-mâché, between moulds
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
- D21H13/36—Inorganic fibres or flakes
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Producing Shaped Articles From Materials (AREA)
Abstract
The present invention provides the manufacturing equipment of rigid thermal insulation tile green body, the equipment includes the water pot for being filled with water；For accommodating the slurry tank of slurry；Suction filtration tank, the suction filtration tank include the bottom plate with filter opening and the liquid collecting portion with liquid outlet below bottom plate；For water pump to be imported to the aqueduct in slurry tank from water pot；With for from slurry tank by slurry import suction filtration tank in passage.The present invention also provides the manufacturing method of rigid thermal insulation tile green body, the method is carried out using the manufacturing equipment.The crude green body of the even density of near net-shape can be made in device and method using the present invention, have many advantages, such as that materials and waste material are few, be easily worked, be at low cost, density uniformity is good, intensity is high.
Description
Technical field
The present invention relates to heat-insulation composite material technical field more particularly to a kind of rigid thermal insulation tile green body and its preparation sides
Method.
Background technology
Since ceramic fibre rigidity thermal insulation tile has many advantages, such as that lightweight, high temperature resistant, lower thermal conductivity and high-temperature stability are good, it is
Using the most thermal protection system of earliest, flying experience and the most commonly used thermally protective materials of space shuttle.For future
Hypersonic aircraft, fuselage large area windward side temperature up to 1400 DEG C or higher, prevent by the superhigh temperature resistant that active demand can tie up shape
Heat-barrier material.Therefore, current and future mainly studies thermal insulation tile by following several respects：(1) by select it is resistance to more
The modes such as fiber, the optimization thermal insulation tile raw material proportioning of high-temperature enable rigid thermal insulation tile to bear higher temperature；(2) by each
Kind of modification mode such as composite aerogel makes fiber regularly arranged etc. to improve the mechanical property of rigid thermal insulation tile and using stablizing
Property；(3) by with resin compounded, prepare light porous ceramic ablation resistant material, reach anti-heat-insulation integrative.
The preparation process of rigid thermal insulation tile generally comprises：Sintering aid, dispersant etc. with chopped strand are mixed, obtain fibre
Slurry is tieed up, then by filtering or compression molding obtains wet base, then by wet base drying and sintering, it is rigidly heat-insulated to obtain ceramic fibre
Watt.However, above-mentioned several aspects are essentially consisted in the research of rigid thermal insulation tile at present, few molding works to rigid thermal insulation tile
Skill process is studied.
However, using thermal insulation tile rigid made from conventional method, there are waste material is more, difficult processing, of high cost, density uniformity
Difference, the problems such as intensity is low.
Invention content
In order to solve the above problem of the prior art, the present invention first aspect provide a kind of ceramic fibre rigidity every
The manufacturing equipment of hot unbaked tile body, the equipment include：
For the water pot being filled with water；
For accommodating the slurry tank of slurry；
Suction filtration tank, the suction filtration tank include the bottom plate with filter opening and the liquid collecting with liquid outlet below bottom plate
Portion；
For water pump to be imported to the aqueduct in slurry tank from water pot；With
For slurry to be imported to the passage in suction filtration tank from slurry tank.
The present invention provides a kind of preparation method of ceramic fibre rigidity thermal insulation tile green body in second aspect, and the method is adopted
It is carried out with the equipment described in first aspect present invention.Preferably, described method includes following steps：
(1) deionized water is fitted into water pot, and slurry is fitted into slurry tank；
(2) deionized water is injected into suction filtration tank until liquid level did not had filtering mold；
(3) membrane diffusion device is opened to be passed through compressed air into slurry tank；And/or start blender to stir in slurry tank
Slurry；
(4) mateiral pump and suction filter pump are opened, control mateiral pump guide speed and suction filter pump drain age velocity it is equal and protect
Hold peak of the liquid level in suction filtration tank higher than filtering mold；
(5) when the slurry liquid identity distance syneresis batch can bottom in slurry tank reaches preset distance, start suction pump and control
The speed of drawing water of suction pump is equal with guide speed and/or drain age velocity, it is preferred that the preset distance is 4cm to 6cm；
(6) when the liquid in suction filtration tank is clarified, suction pump and membrane diffusion device and/or blender is closed, is treated in slurry tank
Slurry be all pumped into suction filtration tank after close mateiral pump, the water in suction filtration tank closes drawing liquid pump after being all extracted, from
And obtain wet base；
(7) wet base is demoulded and is positioned in drying device from filtering mold and dried, so as to obtain ceramic fibre rigidity
Thermal insulation tile green body.
The present invention has following beneficial technique effect：
(1) materials and waste material are few.Since present device and preparation method can cause slurry Solid content along filter module
Have uniform settlement, therefore the green body of near net-shape can be made.It is almost flat relative to the upper surface that traditional suction filtration technology obtains
The green body in face, the present invention may be used apparent less material and the green body that can process same size thermal insulation tile are made, and
It is significantly less to process the waste material generated.
(2) it is easily worked.Due to it is produced by the present invention be the green body of near net-shape, relative to upper table plane
For traditional green body, the present invention is much smaller in the workload that the processing such as cutting, polishing are then carried out to green body, difficult processing
Degree is also significant lower.
(3) it is at low cost.It is expensive due to raw materials such as fiber prices, and the present invention with less material due to that can be made same
The rigid thermal insulation tile of sample ruler cun, therefore cost can be significantly decreased.
(4) density uniformity is good, intensity is high.It is still low solid in the later stage either the stage to be filtered in initial high solids content slurry
Content slurry filters the stage, since the slurry that the present invention is always maintained in slurry tank is uniform, while filters process and all keeps filtering
The upper and lower surface equal-pressure-difference of mold each position on the surface, therefore the good rigid thermal insulation tile of density uniformity can be obtained.
Moreover, because the density uniformity of rigid thermal insulation tile is good so that rigid thermal insulation tile local location is respectively provided with essentially identical intensity,
There is no the weak portion of the intensity caused by Density inhomogeneity, so that rigid thermal insulation tile integrally has high intensity.
Description of the drawings
Fig. 1 is the schematic diagram of present device.
Fig. 2 is the vertical view of hollow-fibre membrane diffuser.
Fig. 3 is the partial enlarged view of the doughnut of the hollow-fibre membrane diffuser in Fig. 2.
Reference numeral is as follows：
Water pot 1：Aqueduct 11：Suction pump 12, inlet valve 13, outlet valve 14, sprinkler head 15；
Slurry tank 2：Passage 21：Mateiral pump 22, inlet valve 23, outlet valve 24, slurry nozzle 25；
Membrane diffusion device 3：Gas access 31, gas cavity 32, doughnut 33 (including：Hollow fiber walls 331, fiber are empty
Chamber 332, trepanning 333), bubble 34；
Suction filtration tank 4：(the drain pipe 411 of liquid collecting portion 41：Drawing liquid pump 412, liquid feed valve 413, liquid valve 414；Liquid outlet 415),
Positive stop strip 42, bottom plate 43；
Filter mold 5：Shaped face 51, reinforcing plate 52.
Specific embodiment
The preferred embodiment of the present invention is specifically described in control attached drawing below, but protection scope of the present invention
It is not limited to these specific embodiments.
With reference to figure 1, what first aspect present invention provided includes for the equipment that manufactures ceramic fibre rigidity thermal insulation tile green body：
For the water pot 1 being filled with water；
For accommodating the slurry tank 2 of slurry；
Suction filtration tank 4, the suction filtration tank 4 include the bottom plate 43 with filter opening and carry liquid outlet positioned at 43 lower section of bottom plate
415 liquid collecting portion 41；
For directing water into the aqueduct 11 in slurry tank 2 from water pot 1；With
For slurry to be imported to the passage 21 in suction filtration tank 4 from slurry tank 2.
In some preferred embodiments, the equipment further includes the drain pipe 411 being connect with liquid outlet 415.
In some preferred embodiments, the equipment further includes：It is arranged on aqueduct 11 and is used to incite somebody to action from water pot 1
Water pump is sent to the suction pump 12 in slurry tank 2.It is used for also it is preferred that the equipment further includes to be arranged on passage 21
From slurry tank 2 by slurry pumping to the mateiral pump 22 in suction filtration tank 4.Also it is preferred that the equipment can also include setting
Drawing liquid pump 412 on drain pipe 411 for being filtered from the material in suction filtration tank 4.
In some preferred embodiments, the suction pump 12 is provided with inlet valve 13 in influent side and/or is being discharged
Side is provided with outlet valve 14.Also it is preferred that the mateiral pump 22 is provided with inlet valve 23 and/or in outlet side in feed side
It is provided with outlet valve 24.In addition have choosing is that the drawing liquid pump 412 is provided with liquid feed valve 413 and/or in tapping side in liquid feeding side
It is provided with liquid valve 414.
The pipe diameter of the aqueduct 12, catheter 22 and/or drain pipe 412 is not particularly limited in the present invention, example
Such as can be 2 inches (DN50).
In some preferred embodiments, the bottom of the slurry tank 2 is additionally provided with for from slurry pot bottom to slurry
The membrane diffusion device 3 (as shown in Figure 2) of bubbling in batch can 2.The membrane diffusion device 3 can be hollow fiber microfiltration membrane component, specifically
Can be that PVDF (Kynoar), PAN (polyacrylonitrile), PE (polyethylene), PP (polypropylene) or PSf (polyether sulfone) etc. are hollow
Fiber micro-filtration membrane module.Membrane diffusion device can include gas access 31, receive from 32 and of gas cavity of 31 air inlet of gas access
With multiple doughnuts 33 of 32 gas connection of gas cavity, the doughnut 33 includes hollow fiber walls 331, by hollow fibre
The fiber lumen 332 and the multiple trepannings 333 (as shown in Figures 2 and 3) opened up in hollow fiber walls that Wei Bi is limited.Trepanning
333 aperture can be nanoscale, for example, 100 nanometers to 200 nanometers, so as to form fine and closely woven gas in sparging process
Thus bubble does not cause slurry significantly to disturb while the Solid content for ensureing the slurry in slurry tank does not settle layering,
And then realize the stabilization flow velocity of slurry in material-pumping tube, it is ensured that the even density of wet base.Compressed air is entered from gas access 31
In gas cavity 32, then enter back into each doughnut 33, then escaped from trepanning 333 into slurry tank, so as to prevent
The sedimentation layering of slurry Solid content.
Additionally or it is further alternative be to be provided with to stir the slurry in slurry tank 3 in the slurry tank 3
Blender (not shown), the sedimentation of slurry Solid content to be prevented to be layered.
In some preferred embodiments, the outlet of the aqueduct 11 is connected with sprinkler head 15.Also it is preferred that
The outlet of the passage 21 is connected with slurry nozzle 25.Due to the use of nozzle, equably cloth can be allowed the water to and be spread across slurry
Batch can enable slurry equably cloth is spread across in suction filtration tank, so as to not to the slurry and/or pumping in slurry jar
The flow regime of material in filter tank causes big disturbance, it is ensured that the even density of rigid thermal insulation tile green body and final product
Property.
In some preferred embodiments, the equipment is further equipped with being placed on the bottom plate 43 of suction filtration tank 4 during work
The filtering mold 5 with filter opening.Preferably, the filtering mold 5 has shaped face 51 and bottom carries reinforcing plate 52,
In such a case, it is possible to which the inner wall in suction filtration tank 4 sets positive stop strip 42 close to the position of bottom plate 43, the reinforcement of mold 5 is filtered
52 frame of plate is on positive stop strip 42.The shaped face 51 for filtering mold 5 can be hemispherical, cone, semi-cylindrical or the rotation of other classes
Turn shaped face.
In some preferred embodiments, the equipment further includes drying device (not shown), is used for filtering
To wet base be dried, so as to obtain dry body.
In some preferred embodiments, the equipment further includes sintering equipment, is used for rigid thermal insulation tile dry body
It is sintered, so as to obtain rigid thermal insulation tile.
The present invention provides a kind of preparation method of ceramic fibre rigidity thermal insulation tile green body in second aspect, and the method is adopted
It is carried out with the equipment described in first aspect present invention.
In some preferred embodiments, described method includes following steps：
(1) deionized water is fitted into water pot, and slurry is fitted into slurry tank.
(2) deionized water is injected into suction filtration tank until liquid level did not had filtering mold to ensure to filter mold surfaces externally and internally pressure
Difference is consistent on filtering die surface.
(3) membrane diffusion device is opened to be passed through compressed air into slurry tank and/or start blender to stir in slurry tank
Slurry, to prevent slurry Solid content settle be layered.
(4) mateiral pump and suction filter pump are opened, the guide speed and the drain age velocity of suction filter pump for controlling mateiral pump (such as can be with
For 0.5m/s) it is equal and keep liquid level in suction filtration tank higher than the peak of filtering mold, to further ensure that in filtering mold
Outer surface pressure difference is consistent on filtering die surface.
(5) the slurry liquid identity distance syneresis batch can bottom in slurry tank reaches preset distance (drinking-water pipe is located at water pot at this time
In port position less than water level at that time in order to avoid impacted to drawing water) when, start suction pump and simultaneously control drawing water for suction pump
Speed is equal with guide speed and/or drain age velocity (being, for example, 0.5m/s).Preferably, the preset distance for 4cm extremely
6cm。
(6) when the liquid in suction filtration tank is clarified, suction pump and membrane diffusion device and/or blender is closed, is treated in slurry tank
Slurry be all pumped into suction filtration tank after close mateiral pump, the water in suction filtration tank closes drawing liquid pump after being all extracted, from
And obtain wet base.
(7) wet base is demoulded and is positioned in drying device from filtering mold and dried, so as to obtain ceramic fibre rigidity
Thermal insulation tile dry body.
In preparation process, entire filter process preferably maintains the liquid level of suction filtration tank to lead to higher than the peak of filtering mold
Crossing hydraulic seal maintains each position of the upper and lower surface pressure difference of filtering mold on filtering die surface of substantially equal, so as to make
It obtains slurry and flows evenly through filtering mold, so as to which the green body of even density be made.
In some preferred embodiments, the slurry includes following component or is made of following component：It is ceramic fine
Dimension, additive, pH adjusting agent and deionized water.
In some preferred embodiments, the ceramic fibre is for chopped strand and selected from by quartz fibre, oxidation
It is one or more in the group that aluminum fiber, Zirconium oxide fibre, mullite fiber form；For example, the ceramic fibre can be with 100% stone
+ 15% mullite fiber of English fiber or+22% alumina fibre of 78% quartz fibre or 85% quartz fibre.Be chopped fibre
The length of dimension can be 5mm to 10mm, and diameter can be 1 micron to 20 microns.
In some preferred embodiments, the additive includes auxiliary curing agent and sintering aid；It is further preferred that
The auxiliary curing agent is starch, and the sintering aid is boron nitride and/or boron carbide.
In some preferred embodiments, the pH adjusting agent is ammonium hydroxide, and utilizes ammonium hydroxide by the pH tune of slurry
It saves to 9 to 10.The inventors discovered that the pH value of slurry is adjusted to 9~10, in this pH value range, the ceramics in slurry
The suspension of fiber and additive (being usually powder) is good, and free settling is not layered, and slurry is easily made to keep uniform.It therefore, can be with
The density of obtained green body is made to keep uniform.
For the composition of slurry, such as can be that (such as 5g's 50kg water+250g+5~10g of ceramic fibre additive powders forms sediment
Powder is as auxiliary curing agent+5g boron nitride and/or boron carbide as sintering aid).PH adjusting agent can be ammonium hydroxide, will by ammonium hydroxide
The pH value of slurry reaches 9~10, and slurry Solid content can be enabled to be dispersed in dispersed phase for a long time.
The present invention prevents slurry sedimentation layering by membrane diffusion device, blender and/or pH adjusting agent, by controlling bubble big
Small and use sprinkler head and the first-class measure reduction of pulp spraying cause the material in slurry tank and/or suction filtration tank big disturbance,
And pass through draw-off tank and slurry tank and matched with suction filtration tank, dilute the slurry and pumping of predetermined altitude in the slurry tank of final stage
Filter, and keep suction filtration tank slurry solid content be deposited to filtering mold during liquid level higher than filtering mold peak,
So as to ensure that the density uniformity of gained green body and the molding of nearly size.
Embodiment
Hereafter the process for being prepared ceramic fibre rigidity thermal insulation tile using equipment to the present invention in the form of embodiment is carried out
Further instruction, but protection scope of the present invention is not limited to these embodiments.
Embodiment 1
The present embodiment is carried out using equipment as shown in Figures 1 to 3, and detailed process is as follows：
1. each pump preheats in advance, in readiness；Deionized water is packed into water pot；Slurry is injected into slurry tank,
The composition of slurry is：50kg water+250g is chopped quartz fibre+5g starch+5g boron carbides, and the length of wherein chopped strand is about
8mm, a diameter of about 10 microns；The pH of slurry is adjusted to pH9 using ammonium hydroxide；Be 400mm by length, a diameter of 300mm half
Cylindrical shaped face filtering mold is put into suction filtration tank and injects deionized water so that liquid level did not had shaped face to filter tooling highest
Point.
2. opening membrane diffusion device, compressed air is passed through, prevents the sedimentation layering of fiber in slurry tank.
3. opening mateiral pump, slurry is pumped into suction filtration tank.Suction filter pump is opened simultaneously, starts to filter.
4. maintaining filtering, control mateiral pump is equal with the flow velocity of drawing liquid pump.
5. when the slurry liquid level in slurry tank is from tank bottom about 5cm height, open suction pump, into slurry tank injection go from
Sub- water.Control suction pump, drawing liquid pump, the flow velocity of suction filter pump equal.
6. the slurry nozzle above sprinkler head and suction filtration tank above slurry tank be in order to allow slurry from pump discharge flow out when
Equably cloth is spread across in slurry tank and suction filtration tank, does not cause big disturbance to the pulp flow state in jar, is taken out so as to improve
Filter the density uniformity of product.
7. entire suction filtration process need to maintain the liquid level of suction filtration tank to be maintained higher than the peak of filtering mold by hydraulic seal
The positive and negative pressure difference filtered at mold different height is of substantially equal, so that slurry flows evenly through filtering mold, is made close
Spend uniform green body.
8. after persistently filtering a period of time, the liquid in suction filtration tank is visually observed, when liquid has been clarified substantially, i.e. fiber base
This all by suction strainer to the surface of filtering mold, is then closed suction pump, closes membrane diffusion device, treat the slurry whole quilt in slurry tank
Mateiral pump is closed after having pumped.Suction filter pump opening is maintained, until the water in suction filtration tank is all extracted, suction filter pump is closed, obtains
To wet base.
9. the wet base of 8. middle preparation is deviate from from filtering mold, position, placed into baking oven in 150 on positioning tool
DEG C bake 24 hours, obtain dry body.
10. the dry body is sintered 5 hours in 1260 DEG C, crude green body is obtained, then crude green body is subjected to machine according to the shape of design and is added
Final products ceramic fibre rigidity thermal insulation tile is made in work.
Embodiment 2
Ceramic fibre rigidity thermal insulation tile is prepared by the way of substantially the same manner as Example 1, the difference lies in using group
The quartz fibre that is chopped is replaced as the fibre blend of+22% alumina fibre of 78% quartz fibre, carbon is replaced using boron nitride
Change boron, adjusted pH to pH10 using ammonium hydroxide.
Embodiment 3
Ceramic fibre rigidity thermal insulation tile is prepared by the way of substantially the same manner as Example 1, the difference lies in using group
The quartz fibre that is chopped is replaced as the fibre blend of+15% mullite fiber of 85% quartz fibre.
Embodiment 4
Ceramic fibre rigidity thermal insulation tile is prepared by the way of substantially the same manner as Example 1, the difference lies in not to pH
It is adjusted, the pH of gained slurry is 6.2.
The following table 1 is that slurry is starched in the interface distance of different time of repose water/fibers used by embodiment 1 and embodiment 4
The distance of liquid level on batch can.
Embodiment 5
The wet base is prepared by the way of traditional, that is, slurry is poured into suction filtration tank and is filtered.It is follow-up dry and
Sintering processing is same as Example 1.
The quality and homogeneity of thermal insulation tile obtained by the different embodiments of table 2.
Raw material availability test method is as follows：Fibre weight × 100% in rigid thermal insulation tile weight/slurry.
Density of material homogeneity testing method is as follows：The regular cube that the length of side is 20cm is cut from rigid thermal insulation tile, then
The regular cube material block that the length of side is taken to be 2cm in the central surface position in cubical six faces, then weighs, and calculates density and mark
Accurate poor (SD).
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the principle of the present invention, several improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of manufacturing equipment of ceramic fibre rigidity thermal insulation tile green body, which is characterized in that the equipment includes：
For the water pot being filled with water；
For accommodating the slurry tank of slurry；
Suction filtration tank, the suction filtration tank include the bottom plate with filter opening and the liquid collecting portion with liquid outlet below bottom plate；
For directing water into the aqueduct in slurry tank from water pot；With
For slurry to be imported to the passage in suction filtration tank from slurry tank.
2. equipment according to claim 1, which is characterized in that the equipment further includes the drain pipe being connect with liquid outlet.
3. equipment according to claim 1 or 2, it is characterised in that：
Be arranged on aqueduct for pumping water into suction pump in slurry tank from water pot；
It is arranged on passage and is used for the mateiral pump in slurry pumping to suction filtration tank from slurry tank；And/or
It is arranged on the drawing liquid pump for being filtered from the material in suction filtration tank on drain pipe.
4. equipment according to any one of claim 1 to 3, it is characterised in that：
The suction pump is provided with inlet valve in influent side and/or water outlet side is provided with outlet valve；
The mateiral pump is provided with inlet valve in feed side and/or outlet side is provided with outlet valve；And/or
The drawing liquid pump is provided with liquid feed valve in liquid feeding side and/or tapping side is provided with liquid valve.
5. equipment according to any one of claim 1 to 4, it is characterised in that：
The bottom of the slurry tank is additionally provided with for from the membrane diffusion device of slurry pot bottom bubbling into slurry tank；And/or
The blender for stirring the slurry in slurry tank is provided in the slurry tank.
6. equipment according to any one of claim 1 to 5, it is characterised in that：
The outlet of the aqueduct is connected with nozzle；And/or
The outlet of the passage is connected with nozzle.
7. equipment according to any one of claim 1 to 6, which is characterized in that the equipment is further equipped with putting during work
Put the filtering mold with filter opening on the bottom plate of suction filtration tank, it is preferred that the filtering mold filters mold for shaped face.
8. equipment according to any one of claim 1 to 7, which is characterized in that the equipment further includes drying device.
9. a kind of preparation method of ceramic fibre rigidity thermal insulation tile green body, which is characterized in that the method using claim 1 to
Equipment described in any one of 8 carries out；Preferably, described method includes following steps：
(1) deionized water is fitted into water pot, and slurry is fitted into slurry tank；
(2) deionized water is injected into suction filtration tank until liquid level did not had filtering mold；
(3) membrane diffusion device is opened to be passed through compressed air into slurry tank；And/or start blender to stir the slurry in slurry tank
Material；
(4) mateiral pump and suction filter pump are opened, control mateiral pump guide speed and suction filter pump drain age velocity it is equal and keep taking out
Liquid level in filter tank is higher than the peak for filtering mold；
(5) when the slurry liquid identity distance syneresis batch can bottom in slurry tank reaches preset distance, start suction pump and control and draw water
The speed of drawing water of pump is equal with guide speed and/or drain age velocity, it is preferred that the preset distance is 4cm to 6cm；
(6) when the liquid in suction filtration tank is clarified, suction pump and membrane diffusion device and/or blender is closed, treats the slurry in slurry tank
Material closes mateiral pump after being all pumped into suction filtration tank, and the water in suction filtration tank closes drawing liquid pump after being all extracted, so as to
To wet base；
(7) wet base is demoulded and is positioned in drying device from filtering mold and dried, it is rigidly heat-insulated so as to obtain ceramic fibre
Unbaked tile body.
10. according to the method described in claim 9, it is characterized in that, the slurry includes following component or by following component
Composition：Ceramic fibre, additive, pH adjusting agent and deionized water；
Preferably, the ceramic fibre is for chopped strand and selected from by quartz fibre, alumina fibre, Zirconium oxide fibre, not
Come one or more in the group of mineral wool composition；
Also it is preferred that the additive includes auxiliary curing agent and sintering aid, it is further preferred that the auxiliary curing agent is forms sediment
Powder, and the sintering aid is boron nitride and/or boron carbide；
Also it is preferred that the pH adjusting agent is ammonium hydroxide, and the pH of slurry is adjusted to 9 to 10 using ammonium hydroxide.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810123041.8A CN108252163B (en) | 2018-02-07 | 2018-02-07 | Manufacturing equipment and preparation method of rigid heat-insulating tile blank |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810123041.8A CN108252163B (en) | 2018-02-07 | 2018-02-07 | Manufacturing equipment and preparation method of rigid heat-insulating tile blank |
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| CN108252163A true CN108252163A (en) | 2018-07-06 |
| CN108252163B CN108252163B (en) | 2019-12-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112250463A (en) * | 2020-09-15 | 2021-01-22 | 航天特种材料及工艺技术研究所 | Method for preparing heat insulation tile blank by spray forming method |
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| CN104892014A (en) * | 2015-05-25 | 2015-09-09 | 哈尔滨工业大学 | Preparation method of 1200 DEG C resistant lightweight rigid ceramic fiber insulation tile |
| CN105272322A (en) * | 2015-09-30 | 2016-01-27 | 航天特种材料及工艺技术研究所 | Light-weight, high temperature-resistance and heat-insulation ceramic fiber tile and making method thereof |
| CN105565845A (en) * | 2015-12-14 | 2016-05-11 | 天津大学 | Preparation method for porous ceramic fiber heat-insulation tile |
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| US3952083A (en) * | 1973-12-26 | 1976-04-20 | Nasa | Silica reusable surface insulation |
| US6613255B2 (en) * | 2001-04-13 | 2003-09-02 | The Boeing Company | Method of making a permeable ceramic tile insulation |
| CN102199042A (en) * | 2011-03-28 | 2011-09-28 | 航天材料及工艺研究所 | Lightweight rigid ceramic heat-insulation tile and manufacture method thereof |
| CN104892014A (en) * | 2015-05-25 | 2015-09-09 | 哈尔滨工业大学 | Preparation method of 1200 DEG C resistant lightweight rigid ceramic fiber insulation tile |
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| CN112250463A (en) * | 2020-09-15 | 2021-01-22 | 航天特种材料及工艺技术研究所 | Method for preparing heat insulation tile blank by spray forming method |
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| CN108252163B (en) | 2019-12-10 |
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