CN112960970A - Prefabrication forming method of alumina fiber module - Google Patents
Prefabrication forming method of alumina fiber module Download PDFInfo
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- CN112960970A CN112960970A CN202110162241.6A CN202110162241A CN112960970A CN 112960970 A CN112960970 A CN 112960970A CN 202110162241 A CN202110162241 A CN 202110162241A CN 112960970 A CN112960970 A CN 112960970A
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- 239000000835 fiber Substances 0.000 title claims abstract description 203
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 title claims abstract description 86
- 238000000034 method Methods 0.000 title claims abstract description 44
- 238000009417 prefabrication Methods 0.000 title claims abstract description 6
- 238000009960 carding Methods 0.000 claims abstract description 34
- 238000000465 moulding Methods 0.000 claims abstract description 15
- 238000005245 sintering Methods 0.000 claims abstract description 14
- 239000000499 gel Substances 0.000 claims description 79
- 230000006835 compression Effects 0.000 claims description 11
- 238000007906 compression Methods 0.000 claims description 11
- 230000003068 static effect Effects 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 229910000746 Structural steel Inorganic materials 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 239000011810 insulating material Substances 0.000 claims description 4
- 239000000741 silica gel Substances 0.000 claims description 4
- 229910002027 silica gel Inorganic materials 0.000 claims description 4
- 239000011368 organic material Substances 0.000 claims description 3
- 238000004806 packaging method and process Methods 0.000 claims description 3
- 239000004743 Polypropylene Substances 0.000 description 8
- 239000013078 crystal Substances 0.000 description 8
- 230000006378 damage Effects 0.000 description 5
- 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 5
- 229910052863 mullite Inorganic materials 0.000 description 5
- 239000006185 dispersion Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 229920000742 Cotton Polymers 0.000 description 2
- 238000000748 compression moulding Methods 0.000 description 2
- 238000007723 die pressing method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 229920002972 Acrylic fiber Polymers 0.000 description 1
- 229920006052 Chinlon® Polymers 0.000 description 1
- 229920004933 Terylene® Polymers 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 229910052729 chemical element Inorganic materials 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/62227—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products obtaining fibres
- C04B35/62231—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products obtaining fibres based on oxide ceramics
- C04B35/62236—Fibres based on aluminium oxide
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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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/60—Aspects relating to the preparation, properties or mechanical treatment of green bodies or pre-forms
- C04B2235/602—Making the green bodies or pre-forms by moulding
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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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
- C04B2235/6567—Treatment time
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- C—CHEMISTRY; METALLURGY
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- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/74—Physical characteristics
- C04B2235/77—Density
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/95—Products characterised by their size, e.g. microceramics
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
Abstract
The invention discloses a prefabrication and forming method of an alumina fiber module, which comprises the following steps: firstly, carding alumina gel fibers; then, filling the alumina gel fiber into a mold; then, molding the alumina gel fiber; then, sintering the alumina gel fiber; finally, the alumina gel fiber is packed, and the fiber is molded in a gel fiber stage, because the alumina fiber has very good flexibility, processability and compressibility in the gel fiber stage, the method selects to carry out pretreatment molding on the alumina fiber in the gel fiber stage, and the density of the alumina fiber reaches a desired value through a molding device.
Description
Technical Field
The invention belongs to the field of inorganic materials, and relates to a preforming method of an alumina fiber module.
Background
The alumina fiber is divided into two categories, short fiber loose cotton and continuous fiber, according to the length of the alumina fiber. The short fiber obtained in the production process is similar to cotton in daily life, and is usually disorderly gathered together, and the bulk density of the fiber is lower than 5Kg/m3Hereinafter, if these low-density fibers are directly packed, a package is producedLow density and low transportation efficiency, and the secondary treatment of the finished fiber can cause irreversible damage to the fiber, which can generate dust to damage the environment and influence the length of the fiber and the later use performance. Therefore, how to overcome the difficulty is a problem which is urgently needed to be solved, namely, the production enterprises can not cause secondary damage to the fibers, can improve the stacking density of the fibers, reduce the cost and improve the transportation efficiency.
Disclosure of Invention
The invention designs and develops a method for prefabricating and forming an alumina fiber module, wherein the density of the prefabricated module reaches a certain density, and then the prefabricated module is sintered at a proper high temperature to prepare the alumina fiber module.
The prefabrication and forming method of the alumina fiber module comprises the following steps:
s1, carding the alumina gel fibers, wherein the length of the alumina gel fibers is L, L is more than or equal to 20cm and less than or equal to 200cm, and the bulk density of the alumina gel fibers is not more than 5Kg/m3；
S2, filling alumina gel fibers into a mold;
s3, molding the alumina gel fiber;
s4, sintering the alumina gel fiber;
and S5, packaging the alumina gel fibers.
According to some embodiments of the present invention, the step S1 is to comb the alumina gel short fibers by hand, and the worker wears a silicone glove with smooth surface and no static electricity to tear and finish the fibers.
According to some embodiments of the present invention, the step S1 is mechanical carding of alumina gel short fibers, and the alumina gel short fibers are carded by a roller carding and elastic card clothing structure.
According to some specific embodiments of the present invention, the step S1 includes:
s11, chopping, namely chopping the alumina gel short fibers to segmented fibers with the length of L by using a guillotine type chopping machine, wherein L is more than or equal to 5mm and less than or equal to 100 mm;
s12, opening, namely opening the segmented fibers in the step S11 by adopting an elastic card clothing structure type opener;
according to some embodiments of the present invention, in the step S12, the elastic card clothing structure type opener uses a rubber-based elastic card clothing, the elastic card clothing has a circular card and a diameter of 1mm, the elastic card is formed into carbon structural steel, and the surface of the elastic card clothing is galvanized.
According to some embodiments of the present invention, in step S3, the alumina gel fiber is molded by using a compression preforming device, the pressure of the molding process is not greater than 1MPa, the compression time is not less than 10min, and the bulk density of the molded alumina gel fiber is not less than 20Kg/m3。
According to some embodiments of the present invention, in step S3, the mold of the compression preforming device is an insulating material piece made of PP organic material.
According to some embodiments of the invention, in the step S4, the sintering temperature of the alumina gel short fiber is T: t is more than or equal to 1000 ℃ and less than or equal to 1400 ℃.
The method has the advantages that the key point of the method for prefabricating and forming the alumina fiber module is that short fibers are formed and molded in the gel fiber stage, and the alumina fibers have very good flexibility, processability and compressibility in the gel fiber stage, so that the method selects to pretreat and form the alumina fibers in the gel fiber stage, the density of the alumina fibers reaches an expected value through a molding device, and research and comparison are carried out on the alumina fibers in two crystal forms of a gamma phase and a mullite phase.
Drawings
FIG. 1 is a flow chart of a method of preforming an alumina fiber module according to an embodiment of the present invention;
FIG. 2 is a schematic representation of the gel fibers prior to preforming;
FIG. 3 is a schematic representation of the stacking state before gel fiber pre-forming;
FIG. 4 is a schematic representation of the gel fibers after they have been pre-formed;
FIG. 5 is a schematic representation of the stacking state after gel fiber pre-forming.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring now to fig. 1 to 5, a method for preforming an alumina fiber module according to an embodiment of the present invention includes the steps of:
s1, carding the alumina gel fibers, wherein the length of the alumina gel fibers is L, L is more than or equal to 20cm and less than or equal to 200cm, and the bulk density of the alumina gel fibers is not more than 5Kg/m3；
S2, filling alumina gel fibers into a mold;
s3, molding the alumina gel fiber;
s4, sintering the alumina gel fiber;
and S5, packaging the alumina gel fibers.
The length of the raw material alumina gel fiber is very long, generally more than 20cm, the length can reach more than 200cm, the average length is about 50cm, and complex and disordered winding can be generated among the gel fibers in the spinning or blowing process, so that the reasonable and controllable carding of the gel fibers is a key step for increasing the density of the gel fibers.
According to some embodiments of the present invention, the step S1 is to comb the alumina gel short fibers by hand, and the worker wears a silicone glove with smooth surface and no static electricity to tear and finish the fibers. The carding and forming of the alumina fiber adopt two modes of manual carding or mechanical carding. The manual carding is that a person tears and finishes the fibers by selecting to take silica gel gloves with smooth surfaces to achieve the purpose of uniform dispersion of the fibers in a mould, wherein the gloves are silica gel gloves with smooth surfaces and no static electricity.
The advantage of manual carding lies in, people take silica gel gloves, is difficult for producing static, and the flexibility and the compliance of hand can not produce the injury to the fibre, and the people judges the effect of combing of the accuse that can be better through real-time observation simultaneously, makes gel fibre change into a state of relative evenly dispersing from the state of disorderly and disorderly. In addition, because the fiber is in a large number of locks, the fiber is difficult to tear by hand, the length of the fiber is not changed in the tearing and dispersing process (the fiber length is still more than 20cm, and the average length is 50cm), so that the fiber is still kept in the original length state, the uniformity of the fiber in a three-dimensional space is limited, and the density of the compression molding process is influenced.
According to some embodiments of the present invention, the step S1 is mechanical carding of alumina gel short fibers, and the alumina gel short fibers are carded by a structure mainly composed of a roller and an elastic card clothing through an opener. Aiming at the characteristic that the alumina gel fiber is not easy to comb, the roller carding and elastic card clothing structure is selected and carded at a low speed, so that the aim of carding and dispersing the gel fiber uniformly is fulfilled. Since the method is only for preforming to increase the packing density, the carding standard is not as high as that of the non-woven textile type, as long as the requirement of increasing the density without damaging the fibers is met.
Although the gel fiber has better flexibility and processability compared with the alumina fiber, the gel fiber has a large difference compared with organic fibers such as terylene, acrylic fiber, chinlon, polypropylene fiber and the like, so that the gel fiber is greatly damaged by directly using equipment for carding and forming the organic fibers (a cylinder comprising a stainless steel roller, a stainless steel card clothing and other hard card clothing), and the fibers are torn and crushed.
According to some specific embodiments of the present invention, the step S1 includes:
s11, chopping, namely chopping the alumina gel short fibers to segmented fibers with the length of L by using a guillotine type chopping machine, wherein L is more than or equal to 5mm and less than or equal to 100 mm;
s12, opening, namely opening the segmented fibers in the step S11 by adopting an elastic card clothing structure type opener;
the mechanical opening method comprises the following two steps:
the first step is chopping, the chopper is of a guillotine type, the structure has less damage to the fibers compared with a high-speed rotary chopper, and the fibers are chopped to 5-100mm in the process so as to be prepared for opening. Because the fibers are too long (average length 50cm) and the gel fibers are weak, if opened directly, the high stiffness and strength of the opener (less gentle than a human hand) easily breaks the fibers.
The second step is opening, the opening equipment adopts an opener with a special elastic card clothing structure, and the opener consists of a feeding roller and an elastic opening cylinder (card clothing). The opening process is that fibers collected in the production process are conveyed to the opening part through a roller, and then the fibers are torn by a needle type structure on the opening cylinder, so that the gel fibers achieve the purpose of better dispersion forming compared with manual opening and carding.
The specifications of the elastic card clothing are as follows: the rubber-based elastic card clothing is adopted, round needles with the diameter of 1mm are adopted, and the material is carbon structural steel (surface galvanized) or stainless steel.
According to some embodiments of the present invention, in the step S12, the elastic card clothing structure type opener uses a rubber-based elastic card clothing, the elastic card clothing has a circular card and a diameter of 1mm, the elastic card is formed into carbon structural steel, and the surface of the elastic card clothing is galvanized.
According to some embodiments of the present invention, in step S3, the alumina gel fiber is molded by using a compression preforming device, the pressure of the molding process is not greater than 1MPa, and the molding process is performed after the molding processThe bulk density of the alumina gel fiber is not less than 20Kg/m3。
The opening carding process is to achieve a better dispersion effect of the fibers in three-dimensional space, and the compression molding process is to increase the bulk density of the gel fibers to 20Kg/m from a density of less than 5Kg/m33Therefore, the fiber density after sintering is improved, and simultaneously, the fiber achieves the purposes of preforming and modularization through the process.
According to some embodiments of the present invention, in step S3, the mold of the compression preforming device is an insulating material piece made of PP organic material.
The process adopts self-designed compression preforming equipment, power is hydraulic pressure or air pressure, a mold is made of PP and other organic insulating materials (static electricity is not easy to generate in the using process and the problem of electrostatic adsorption does not exist with fibers), the shape is a rectangular structure (the corresponding size can be calculated and designed according to the specific required density, the length is 500-1000mm, the width is 300-600mm and the height is 100-300mm), the high compression force (0-1MPa) is utilized to reduce the gap between the fibers, the effective stacking density of the gel fibers is improved, and the reasonable range of 20-40Kg/m is reached3。
According to some embodiments of the invention, in the step S4, the sintering temperature of the alumina gel short fiber is T: t is more than or equal to 1000 ℃ and less than or equal to 1400 ℃. The sintering process is a process for converting gel fiber into alumina fiber, the temperature in the process is 1000-1400 ℃, firstly, moisture in the gel fiber is volatilized by using high temperature, secondly, organic matters and other inorganic chemical components which can be oxidized and volatilized are burnt, and finally, aluminum, silicon and other needed components are converted into needed crystal phases (gamma phase, mullite phase or alpha phase), in the process, the preformed gel fiber becomes alumina fiber products, and simultaneously, the fiber module generates about 1/2 volume shrinkage in volume due to the volatilization of moisture in the gel fiber and the reconstruction of chemical elements in the fiber, and simultaneously, the density is further increased.
According to the prefabrication forming method of the alumina fiber module, the key point is that short fibers are subjected to carding forming and die pressing in a gel fiber stage, and because the alumina fibers have very good flexibility, processability and compressibility in the gel fiber stage, the method selects pretreatment forming on the alumina fibers in the gel fiber stage, firstly, the fibers are subjected to better cross gap filling through carding, and secondly, the density of the fibers reaches a desired value through a die pressing device.
The invention mainly researches and compares alumina fibers in two crystal forms of a gamma phase and a mullite phase, and because the influence of the gamma phase and the mullite phase fibers on the volume can be ignored, the module prepared by the method has no difference in volume, and only because the fibers have better flexibility under the condition of the gamma phase, the obtained module also has better operability.
The method for preforming an alumina fiber module according to an embodiment of the present invention will be described with reference to specific embodiments.
Example 1
2.5Kg of gel fiber with a density of 4.6Kg/m is taken3Opening and carding the fibers by manual carding, and filling into a PP mold with the size of 750 × 550 × 300mm3Uniformly dispersing the fiber in a die, molding the fiber in the die by using a pneumatic press (pressure value is between 0 and 1MPa), keeping the pressure at 0.2MPa for 5min, and making the preformed gel fiber module have the size of 795 multiplied by 650 multiplied by 200mm3Density of 25Kg/m3Sintering at 1050 deg.C for 30min to obtain final product fiber module with mass of 1.25Kg and size of 450 × 300 × 120mm3Density of 77Kg/m3The crystal phase is a dell phase.
Example 2
2.5Kg of gel fiber with a density of 4.6Kg/m is taken3Opening and carding the fibers by manual carding, and filling into a PP mold with the size of 750 × 550 × 300mm3Uniformly dispersing the fibers in the die, molding the fibers in the die by using a pneumatic press (the pressure value is between 0 and 1MPa), keeping the pressure at 0.4MPa for 10min, and performing gel fiber module rulerInch 780X 620X 190mm3The density is 27Kg/m3Sintering at 1050 deg.C for 30min to obtain fiber module with mass of 1.25Kg and size of 430 × 280 × 115mm3The density is 90Kg/m3The crystal phase is a dell phase.
Example 3
Taking 2.5Kg of gel fiber, chopping the fiber by a guillotine type chopping machine (the chopping frequency is 60times/min), the chopped fiber length is 50-80mm, then opening and carding the fiber by a mechanical carding mode, and loading the fiber into a PP mold with the size of 750X 550X 300mm3Uniformly dispersing the fiber in a mold, molding the fiber in the mold by a pneumatic press (pressure value of 0-1MPa) under 0.4MPa for 10min, wherein the size of the preformed gel fiber module is 765 × 610 × 185mm3The density is 29Kg/m3Sintering at 1050 deg.C for 30min to obtain fiber module with mass of 1.25Kg and size of 410 × 275 × 110mm3Density of 101Kg/m3The crystal phase is a dell phase.
Example 4
Taking 2.5Kg of gel fiber, chopping the fiber by a guillotine type chopping machine (the chopping frequency is 60times/min), the chopped fiber length is between 70 and 100mm, then opening and carding the fiber by a mechanical carding mode, and loading the fiber into a PP mold with the size of 750 multiplied by 550 multiplied by 300mm3Uniformly dispersing the fiber in a die, and molding the fiber in the die by using a pneumatic press (the pressure value is between 0 and 1MPa), wherein the pressure is 0.4MPa, the holding time is 10min, and the size of a preformed gel fiber module is 775 multiplied by 615 multiplied by 195mm3The density is 27Kg/m3Sintering at 1050 deg.C for 30min to obtain fiber module with mass of 1.25Kg and size of 418 × 280 × 110mm3The density is 97Kg/m3The crystal phase is a dell phase.
Example 5
Sintering at 1300 deg.C for 30min to obtain fiber module with mass of 1.25Kg and size of 410X 270X 110mm as in example 33The density is 103Kg/m3The crystal phase is mullite phase.
Example 6
2.5Kg of gel fiber with a density of 4.6Kg/m is taken3The fiber is directly opened and carded by a mechanical carding mode, the length of the fiber is between 1 and 5mm, and the fiber cannot be molded by compression after being too broken and filled into a mold.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (9)
1. The prefabrication and forming method of the alumina fiber module is characterized by comprising the following steps:
s1, carding the alumina gel fibers, wherein the length of the alumina gel fibers is L, L is more than or equal to 20cm and less than or equal to 200cm, and the bulk density of the alumina gel fibers is not more than 5Kg/m3；
S2, filling alumina gel fibers into a mold;
s3, molding the alumina gel fiber;
s4, sintering the alumina gel fiber;
and S5, packaging the alumina gel fibers.
2. The method for preforming an alumina fiber module according to claim 1, wherein: and step S1, manually carding the alumina gel short fibers, and tearing and finishing the fibers by workers wearing silica gel gloves with smooth surfaces and no static electricity.
3. The method for preforming an alumina fiber module according to claim 1, wherein: and step S1, mechanically carding alumina gel short fibers, and carding the alumina gel short fibers by adopting a roller carding and elastic card clothing structure.
4. The method of preforming an alumina fiber module according to claim 3, wherein: the step S1 includes:
s11, chopping, namely chopping the alumina gel short fibers to segmented fibers with the length of L by using a guillotine type chopping machine, wherein L is more than or equal to 5mm and less than or equal to 100 mm;
s12, opening, namely, opening the segmented fibers in the step S11 by an elastic card clothing structure type opener.
5. The method for preforming an alumina fiber module according to claim 4, wherein: in the step S12, the opener with the elastic card clothing structure adopts rubber-based elastic card clothing, an elastic needle of the rubber-based elastic card clothing is a circular needle, the diameter of the elastic needle is 1mm, the elastic needle is formed into carbon structural steel, and the surface of the elastic needle is galvanized.
6. The method for preforming an alumina fiber module according to claim 1, wherein: in the step S3, a compression preforming device is used for carrying out mould pressing treatment on the alumina gel fiber, the pressure of the mould pressing treatment is not more than 1MPa, the mould pressing time is not less than 10min, and the bulk density of the alumina gel fiber after mould pressing is not less than 20Kg/m3。
7. The method for preforming an alumina fiber module according to claim 1, wherein: in step S3, the mold of the compression preforming device is an insulating material made of PP organic material.
8. The method for preforming an alumina fiber module according to claim 1, wherein: in the step S4, the sintering temperature of the alumina gel short fiber is T: t is more than or equal to 1000 ℃ and less than or equal to 1400 ℃.
9. The method for preforming an alumina fiber module according to claim 7, wherein: the power of the compression preforming device is hydraulic pressure or air pressure, the pressure range is 0-1MPa, the shape of the die is a rectangular structure, the length is 500-1000mm, the width is 300-600mm, and the height is 100-300 mm.
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| US5320791A (en) * | 1991-04-30 | 1994-06-14 | Mitsui Mining Company, Limited | Method for preparing molded articles of high-purity alumina fibers |
| CN106087437A (en) * | 2016-06-15 | 2016-11-09 | 无锡市明江保温材料有限公司 | The manufacture method of mineral wool panels peculiar to vessel |
| JP2017110564A (en) * | 2015-12-16 | 2017-06-22 | イビデン株式会社 | Holding seal material and process of manufacture of holding seal material |
| CN109208171A (en) * | 2018-10-17 | 2019-01-15 | 江苏腾利特种纤维科技有限公司 | A kind of preparation method of polycrystalline alumina fiber needle-penetrating liner |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5320791A (en) * | 1991-04-30 | 1994-06-14 | Mitsui Mining Company, Limited | Method for preparing molded articles of high-purity alumina fibers |
| JP2017110564A (en) * | 2015-12-16 | 2017-06-22 | イビデン株式会社 | Holding seal material and process of manufacture of holding seal material |
| CN106087437A (en) * | 2016-06-15 | 2016-11-09 | 无锡市明江保温材料有限公司 | The manufacture method of mineral wool panels peculiar to vessel |
| CN109208171A (en) * | 2018-10-17 | 2019-01-15 | 江苏腾利特种纤维科技有限公司 | A kind of preparation method of polycrystalline alumina fiber needle-penetrating liner |
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Denomination of invention: A Prefabrication Method for Alumina Fiber Module Effective date of registration: 20231228 Granted publication date: 20220920 Pledgee: Weihai commercial bank Limited by Share Ltd. Dongying branch Pledgor: Shandong Dongheng national fiber new material Co.,Ltd. Registration number: Y2023980074970 |
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