CN108440008A - A kind of high porosity ceramic filtering material and preparation method thereof - Google Patents
A kind of high porosity ceramic filtering material and preparation method thereof Download PDFInfo
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- CN108440008A CN108440008A CN201810434597.9A CN201810434597A CN108440008A CN 108440008 A CN108440008 A CN 108440008A CN 201810434597 A CN201810434597 A CN 201810434597A CN 108440008 A CN108440008 A CN 108440008A
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- 238000001914 filtration Methods 0.000 title claims abstract description 100
- 239000000919 ceramic Substances 0.000 title claims abstract description 94
- 239000000463 material Substances 0.000 title claims abstract description 89
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 239000000835 fiber Substances 0.000 claims abstract description 45
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 21
- 239000000843 powder Substances 0.000 claims abstract description 15
- 238000001035 drying Methods 0.000 claims abstract description 10
- 239000002994 raw material Substances 0.000 claims abstract description 8
- 238000010304 firing Methods 0.000 claims abstract description 6
- 239000007788 liquid Substances 0.000 claims abstract description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 36
- 230000032683 aging Effects 0.000 claims description 18
- 238000001125 extrusion Methods 0.000 claims description 18
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 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 claims description 11
- 229910052863 mullite Inorganic materials 0.000 claims description 11
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 10
- 239000011148 porous material Substances 0.000 claims description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 7
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 6
- 239000003546 flue gas Substances 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 4
- 229920002472 Starch Polymers 0.000 claims description 2
- 239000008107 starch Substances 0.000 claims description 2
- 235000019698 starch Nutrition 0.000 claims description 2
- 229910052573 porcelain Inorganic materials 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 17
- 239000006260 foam Substances 0.000 abstract description 5
- 230000007797 corrosion Effects 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 4
- 239000011236 particulate material Substances 0.000 abstract description 4
- 239000007767 bonding agent Substances 0.000 abstract description 3
- 229910052783 alkali metal Inorganic materials 0.000 abstract description 2
- 150000001340 alkali metals Chemical class 0.000 abstract description 2
- 229910001420 alkaline earth metal ion Inorganic materials 0.000 abstract description 2
- 238000010137 moulding (plastic) Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000000428 dust Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000002243 precursor Substances 0.000 description 3
- 239000003575 carbonaceous material Substances 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 239000003517 fume Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000003828 vacuum filtration Methods 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000001471 micro-filtration Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
- B01D39/2068—Other inorganic materials, e.g. ceramics
- B01D39/2093—Ceramic foam
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
- B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
- B01D46/2418—Honeycomb filters
-
- 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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/06—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by burning-out added substances by burning natural expanding materials or by sublimating or melting out added substances
- C04B38/063—Preparing or treating the raw materials individually or as batches
- C04B38/0635—Compounding ingredients
- C04B38/0645—Burnable, meltable, sublimable materials
- C04B38/068—Carbonaceous materials, e.g. coal, carbon, graphite, hydrocarbons
-
- 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
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3418—Silicon oxide, silicic acids, or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint
-
- 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
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/52—Constituents or additives characterised by their shapes
- C04B2235/5208—Fibers
- C04B2235/5216—Inorganic
- C04B2235/522—Oxidic
- C04B2235/5224—Alumina or aluminates
-
- 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
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/52—Constituents or additives characterised by their shapes
- C04B2235/5208—Fibers
- C04B2235/5216—Inorganic
- C04B2235/522—Oxidic
- C04B2235/5228—Silica and alumina, including aluminosilicates, e.g. mullite
-
- 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
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
Abstract
The invention belongs to fine ceramics filtration arts, and in particular to a kind of high porosity ceramic filtering material and preparation method thereof.Three-dimensional network-like structure ceramic filter material is made through plastic molding, drying, firing using ceramic fibre as primary raw material, with the feature that the porosity is high, flexural strength is higher, filtration resistance is low.The present invention uses silica powder for bonding agent, by making ceramic fibre be firmly combined with reacting for ceramic fibre surface under high temperature, improves the intensity of filtering material；Ceramic fibre intersects the three-dimensional net structure for combining and constituting high porosity, and the porosity is far above ceramic foam filter made of traditional use feed particulate material；Under the conditions of identical filtering accuracy, filtration resistance is significantly less than conventional porous ceramic filter material.Due to the high porosity ceramic filtering material for preparing of the present invention not alkali metal containing, alkaline-earth metal ions, there is preferable heat-resisting quantity and corrosion resistance.The high porosity ceramic filtering material made from this method can be used for the filtering of gas, liquid.
Description
Technical field
The invention belongs to fine ceramics filtration arts, and in particular to a kind of high porosity ceramic filtering material, its preparation side
Method and application thereof.
Background technology
In recent years, the haze phenomenon that atmosphere pollution causes not only affects daily life, but also harmful to human is strong
Health has become a urgent problem.The discharge of particulate matter greatly derives from industrial production in atmosphere pollution
Pollution, the especially industries such as coal fired power generation, chemical industry, metallurgy, manufacture of cement.Particulate Pollution is past in the discharge gas of these industries
Toward higher, the electricity used at present gathers dust, bag collection has certain dust removing effects, but need to be into the case of flue-gas temperature height
It goes to cool processing or cold wind is added and carries out cooling processing, the discharge capacity relative increase of flue gas after cold wind is added, it is corresponding to increase
The investment of cleaner.High-temperature flue gas can directly be handled using heat safe porous ceramic film material, treated flue gas particle
Object discharge capacity is low, is better than traditional bag-type dust and electric dust-removing equipment, achievees the effect that reduce haze.It is traditionally used for filtering
Porous ceramics is produced using feed particulate material, and product gas porosity is 50% hereinafter, filtration resistance is bigger than normal.Aperture is 10 micro-
Filtration resistance when the conventional porous ceramic material of rice or so filters flue gas under 1 m/min of wind speed reaches 30000Pa, influences
Its application effect in industrial dedusting, filtering.Therefore, there is an urgent need to a kind of high hole low-resistances for high temperature fume dust removal
The ceramic filter material of power.High porosity ceramic filtering material is mainly using vacuum filtration molding and precursor organic foam at present
It is molded two methods.Vacuum filtration forming process is complicated, process is more, low production efficiency, and stress concentration phenomenon usually occurs in product
And crack, cause decrease in yield.The product aperture of precursor organic foam method of forming production is big, and filtering accuracy is limited, only suitable
Conjunction uses on melted metal filtering, and it is micron-sized ceramic foam filter that cannot produce aperture.
Invention content
The purpose of the present invention is to provide a kind of high porosity ceramic filtering material, Its Preparation Method And Uses.The height
Porosity ceramic filtering material is made using ceramic fibre as primary raw material through plastic molding, drying, firing, because raw material itself is
Threadiness, instead of traditional feed particulate material, the final ceramic product of production has three-dimensional network-like structure, the porosity
It is high, filtration resistance is low, flexural strength is higher, high temperature resistance and corrosion resistance and good.
Another object of the present invention is to provide a kind of preparation methods of high porosity ceramic filtering material, including following step
Suddenly：
(1) raw material select
The raw materials used framework material for selecting ceramic fibre as high porosity ceramic filtering material, including mullite fiber,
The mixture of one or more of alumina fibre, alumina silicate fibre is bonded three by the intersection of ceramic fibre
Network-like structure is tieed up, the coherent stomata of multichannel is formed；Selective oxidation silica flour is bonding agent, under high temperature by with ceramic fibre table
The reaction in face makes ceramic fibre be firmly combined with, and improves the intensity of filtering material；Select carbonaceous material, such as activated carbon, starch or
Sawdust, especially activated carbon are pore creating material, the gas overflowing that pore creating material oxidizing fire generates under high temperature, in material internal shape
The duct at stomata and continuously penetrated through, further increases the porosity of material.
(2) raw material is prepared and is molded
The ratio for being 30-80: 70-20: 10-50: 30-50 according to mass ratio by ceramic fibre, silica powder, pore creating material and water
Example is mixed and stirred for uniformly, by pug mill refining at plastic pug, plastic pug is placed in it is aging in closed container, using
Vacuum extrusion forming equipment is molded to obtain hollow tubular and tabular green body.
(3) dry and firing
The green body of extrusion is placed in drying 24-48 hours in drying device, and is burnt under the conditions of 1000~1200 DEG C, is protected
Warm time 1-3 hours.
In the preparation method of above-mentioned high porosity ceramic filtering material, the ceramic fibre is mullite fiber, aluminium oxide
The mixture of one or more of fiber, alumina silicate fibre.These ceramic fibres first pass around before dispensing mixing
WATER-WASHING METHOD removes the gred, then carries out the Homogenization Treatments that are chopped, and fiber size draw ratio that treated is 5-40: 1, preferably 20-40: 1,
Most preferably 20-35: 1.
The pore creating material is carbonaceous material especially activated carbon, is aoxidized by pore creating material under high temperature and the gas for generation of burning
Body overflows, and can obtain higher porosity.
The plastic mud material is refined by pug mill, the aging time be 24-72 hour, preferably 30-60 hours, with acquisition
It is homogenized good plastic mud material.
The body drying temperature is 30-60 DEG C, and drying time is 24-48 hours, preferably 30-40 hours.
The firing temperature is 1000~1200 DEG C, the high porosity ceramic filter material obtained under this firing temperature
Expect that flexural strength is higher.
By above-mentioned preparation method, high porosity ceramic filtering material of the present invention can be obtained.
The present invention also provides a kind of high porosity ceramic filtering material prepared as stated above, the material aperture exists
Between 10~21 μm, the porosity is 51~89%, and the filtration resistance under 1 m/min of wind speed has within the scope of 79-162Pa
The positive power of filtering is low, the high characteristic of filter efficiency.
The high porosity ceramic filtering material of the present invention, flexural strength 1.2-17.2MPa, it is ensured that filtering material exists
It is indeformable when work, especially under high temperature environment in use, durability is good, while it can get well stable filter effect.
The high porosity ceramic filtering material of the present invention is resistant to 600 DEG C of high temperature, has good durability, has simultaneously
Good corrosion resistance, especially suitable for industries such as more severe working environments, such as smelting, cement, chemical industry, power plant.
The beneficial effects of the present invention are：The high porosity ceramic filtering material made from this method and conventional particles raw material
The porous ceramics of production reduces hundreds of times compared to resistance；Its production process is simple and convenient compared with forming method is filtered by vacuum, raw
It produces efficient；Its aperture is up to micron order compared with grade porous material made from precursor organic foam method.The present invention
It uses silica powder for bonding agent, by making ceramic fibre be firmly combined with reacting for ceramic fibre surface under high temperature, significantly carries
The high intensity of filtering material, extends the service life of filtering material, correspondingly reduces use cost；Ceramic fibre intersects
It is bonded the three-dimensional net structure of high hole, the porosity is far above porous ceramics made of traditional use feed particulate material
Filtering material；Under the conditions of identical filtering accuracy, filtration resistance is significantly less than conventional porous ceramic filter material.Due to this hair
The high porosity ceramic filtering material of bright preparation not with preferable corrosion resistance simultaneously should by alkali metal containing, alkaline-earth metal ions
Ceramic filter material is resistant to 600 DEG C of high temperature, can be widely applied to the fields such as high temperature fume dust removal and liquid filtering.
Description of the drawings
Fig. 1 is the structural schematic diagram using tubulose high porosity ceramic filtering material made from the method in the present invention；
Fig. 2 is the structural schematic diagram using plate high porosity ceramic filtering material made from the method in the present invention.
Fig. 3 is the scanning electron microscope diagram (500 times of amplification factor) of high porosity ceramic filtering material microstructure
Specific implementation mode
As the filtering direction of Fig. 1 this filtering material be from the outside (10) of pipe to pipe on the inside of (20) direction filter.
As the filtering direction of Fig. 2 this filtering material be from the outside (10) of plate to plate on the inside of (20) direction filter.
Below by embodiment, the present invention is described in further detail：
Embodiment 1
It is 80: 20: 10: 50 in mass ratio by mullite fiber that draw ratio is 10: 1, silica powder, activated carbon, water
Ratio is mixed and stirred for uniformly, plastic pug being made, and aging 48 hours, extrusion molding was simultaneously 48 hours dry under the conditions of 60 DEG C,
It is fired into high porosity ceramic filtering material finished product by 1200 DEG C, the aperture of high porosity ceramic filtering material is 10 μm,
The porosity is 51%, and the flexural strength of sample is 19.8MPa.The filtration resistance 140Pa under 1 m/min of wind speed.
Embodiment 2
It is 70: 30: 10: 35 in mass ratio by mullite fiber that draw ratio is 20: 1, silica powder, activated carbon, water
Ratio is mixed and stirred for uniformly, plastic pug being made, and aging 60 hours, extrusion molding was simultaneously 24 hours dry under the conditions of 50 DEG C,
It is fired into high porosity ceramic filtering material finished product by 1180 DEG C, the aperture of high porosity ceramic filtering material is 15 μm,
The porosity is 53%, and the flexural strength of sample is 17.1MPa.The filtration resistance 115Pa under 1 m/min of wind speed.
Embodiment 3
It is 60: 40: 10: 35 ratio in mass ratio by alumina fibre that draw ratio is 5: 1, silica powder, activated carbon, water
Example is mixed and stirred for uniformly, plastic pug being made, aging 50 hours, extrusion molding was simultaneously 24 hours dry under the conditions of 40 DEG C, passes through
It crosses 1150 DEG C and is fired into high porosity ceramic filtering material finished product, the aperture of high porosity ceramic filtering material is 13 μm, gas
Porosity is 56%, and the flexural strength of sample is 15.3MPa.The filtration resistance 155Pa under 1 m/min of wind speed.
Embodiment 4
It is 40 in mass ratio by mullite fiber that draw ratio is 5: 1, alumina silicate fibre, silica powder, activated carbon, water:
10: 50: 10: 35 ratio is mixed and stirred for uniformly, being made plastic pug, aging 30 hours, extrusion molding and in 60 DEG C of conditions
Lower drying 30 hours is fired into high porosity ceramic filtering material finished product, high porosity ceramic filtering material by 1150 DEG C
Aperture be 12 μm, the porosity 54%, the flexural strength of sample is 16.9MPa.The filtration resistance under 1 m/min of wind speed
162Pa。
Embodiment 5
It is 40: 60: 10: 35 in mass ratio by mullite fiber that draw ratio is 20: 1, silica powder, activated carbon, water
Ratio is mixed and stirred for uniformly, plastic pug being made, and aging 24 hours, extrusion molding was simultaneously 40 hours dry under the conditions of 60 DEG C,
It is fired into high porosity ceramic filtering material finished product by 1100 DEG C, the aperture of high porosity ceramic filtering material is 21 μm,
The porosity is 53%, and the flexural strength of sample is 17.2MPa.The filtration resistance 116Pa under 1 m/min of wind speed.
Embodiment 6
It is 30: 70: 10: 35 in mass ratio by alumina fibre that draw ratio is 30: 1, silica powder, activated carbon, water
Ratio is mixed and stirred for uniformly, plastic pug being made, and aging 65 hours, extrusion molding was simultaneously 35 hours dry under the conditions of 55 DEG C,
It is fired into high porosity ceramic filtering material finished product by 1000 DEG C, the aperture of high porosity ceramic filtering material is 13 μm,
The porosity is 51%, and the flexural strength of sample is 15.6MPa.The filtration resistance 89Pa under 1 m/min of wind speed.
Embodiment 7
It is 30: 70: 30: 41 in mass ratio by alumina silicate fibre that draw ratio is 35: 1, silica, activated carbon, water
Ratio is mixed and stirred for uniformly, plastic pug being made, and aging 35 hours, extrusion molding was simultaneously 72 hours dry under the conditions of 30 DEG C,
It is fired into high porosity ceramic filtering material finished product by 1000 DEG C, the aperture of high porosity ceramic filtering material is 16 μm,
The porosity is 72%, and the flexural strength of sample is 6.1MPa.The filtration resistance 82Pa under 1 m/min of wind speed.
Embodiment 8
It is 40: 60: 50: 45 in mass ratio by alumina silicate fibre that draw ratio is 20: 1, silica, activated carbon, water
Ratio is mixed and stirred for uniformly, plastic pug being made, and aging 42 hours, extrusion molding was simultaneously 60 hours dry under the conditions of 40 DEG C,
It is fired into high porosity ceramic filtering material finished product by 1100 DEG C, the aperture of high porosity ceramic filtering material is 18 μm,
The porosity is 89%, and the flexural strength of sample is 1.2MPa.The filtration resistance 79Pa under 1 m/min of wind speed.
Embodiment 9
It is 65 in mass ratio by mullite fiber that draw ratio is 15: 1, alumina fibre, silica powder, activated carbon, water:
5: 30: 10: 35 ratio is mixed and stirred for uniformly, being made plastic pug, aging 24 hours, extrusion molding and under the conditions of 60 DEG C
It is 48 hours dry, it is fired into high porosity ceramic filtering material finished product by 1180 DEG C, high porosity ceramic filtering material
Aperture is 14 μm, the porosity 56%, and the flexural strength of sample is 17.4MPa.The filtration resistance under 1 m/min of wind speed
118Pa。
Embodiment 10
Draw ratio is pressed for 20: 1 mullite fiber, alumina fibre, alumina silicate fibre, silica powder, activated carbon, water
The ratio that mass ratio is 60: 5: 5: 30: 10: 35 is mixed and stirred for uniformly, being made plastic pug, aging 36 hours, extrusion molding
And it is 72 hours dry under the conditions of 35 DEG C, it is fired into high porosity ceramic filtering material finished product, high porosity by 1160 DEG C
The aperture of ceramic filter material is 15 μm, the porosity 55%, and the flexural strength of sample is 17.4MPa.In 1 m/min of wind
The lower filtration resistance 121Pa of speed.
Embodiment 11
It is 40: 60: 50: 45 in mass ratio by alumina silicate fibre that draw ratio is 40: 1, silica, activated carbon, water
Ratio is mixed and stirred for uniformly, plastic pug being made, and aging 40 hours, extrusion molding was simultaneously 48 hours dry under the conditions of 50 DEG C,
It is fired into high porosity ceramic filtering material finished product by 1050 DEG C, the aperture of high porosity ceramic filtering material is 18 μm,
The porosity is 85%, and the flexural strength of sample is 1.5MPa.The filtration resistance 87Pa under 1 m/min of wind speed.
Embodiment 12
It is 40: 60: 50: 45 in mass ratio by alumina silicate fibre that draw ratio is 10: 1, silica, activated carbon, water
Ratio is mixed and stirred for uniformly, plastic pug being made, and aging 32 hours, extrusion molding was simultaneously 72 hours dry under the conditions of 40 DEG C,
It is fired into high porosity ceramic filtering material finished product by 1050 DEG C, the aperture of high porosity ceramic filtering material is 19 μm,
The porosity is 82%, and the flexural strength of sample is 1.7MPa.The filtration resistance 101Pa under 1 m/min of wind speed.
Embodiment 13
It is 60: 40: 10: 30 ratio in mass ratio by alumina fibre that draw ratio is 5: 1, silica powder, activated carbon, water
Example is mixed and stirred for uniformly, plastic pug being made, aging 40 hours, extrusion molding was simultaneously 48 hours dry under the conditions of 50 DEG C, passes through
It crosses 1180 DEG C and is fired into high porosity ceramic filtering material finished product, the aperture of high porosity ceramic filtering material is 15 μm, gas
Porosity is 54%, and the flexural strength of sample is 15.5MPa.The filtration resistance 162Pa under 1 m/min of wind speed.
Embodiment 14
It is 80: 20: 20: 40 in mass ratio by mullite fiber that draw ratio is 10: 1, silica powder, activated carbon, water
Ratio is mixed and stirred for uniformly, being made plastic pug, aging 24 hours, 48 hours dry, warp under the conditions of extrusion molding and 50 DEG C
It crosses 1200 DEG C and is fired into high porosity ceramic filtering material finished product, the aperture of high porosity ceramic filtering material is 12 μm, gas
Porosity is 53%, and the flexural strength of sample is 18.7MPa.The filtration resistance 146Pa under 1 m/min of wind speed.
Porous heat safe ceramic filter material can be easily produced with the method for the present invention, at present by medium
Pilot test, into the stage of operation, industrialization has may be implemented in this method.
The high-temperature ceramic filter pipe prepared according to the method for the present invention can be prepared into the length of needs according to commercial Application demand
Degree, the prior art is usually 1500-2000mm by length prepared by other methods, and the filtering pipe range prepared with the method for the present invention
Degree can reach 5000mm, and caliber can reach 120-150mm.Because of the limitation of traffic condition, in practical application generally
2800mm。
Claims (10)
1. a kind of high porosity ceramic filtering material, it is characterised in that it be ceramic fibre, silica powder be raw material made of,
The ceramic fibre is one or more of mullite fiber, alumina fibre, alumina silicate fibre mixture, pottery
The mass ratio of porcelain fiber and silica is 30-80: 70-20.
2. high porosity ceramic filtering material according to claim 1, it is characterised in that the material porosity be 51-89%,
12-21 μm of aperture, flexural strength 1.2-17.2MPa, filtration resistance 79-162Pa (1 m/min of wind speed).
3. high porosity ceramic filtering material according to claim 1 or 2, it is characterised in that the major diameter of the ceramic fibre
Than being 5-40: 1.
4. according to claim 1-3 any one of them high porosity ceramic filtering materials, it is characterised in that the filtering material
For hollow tube or tablet.
5. a kind of preparation method of high porosity ceramic filtering material, it is characterised in that by ceramic fibre, silica powder, pore creating material
It is mixed evenly according to the ratio that mass ratio is 30-80: 70-20: 10-50: 30-45 with water, plastic mud material is made, it is aging,
Extrusion molding and drying, are fired into high porosity ceramic filtering material, and the ceramic fibre is mullite fiber, aluminium oxide
The draw ratio of the mixture of one or more of fiber, alumina silicate fibre, the ceramic fibre is 5-40: 1.
6. preparation method according to claim 5, it is characterised in that the pore creating material is activated carbon, starch or sawdust.
7. preparation method according to claim 5, it is characterised in that the plastic mud material refines 1-6 by pug mill
Secondary, the aging time is 24-72 hours.
8. preparation method according to claim 5, it is characterised in that the extrusion molding drying is extruded by vacuum
Former is molded to obtain green body, and 24-48 hours dry under the conditions of 30-60 DEG C in drying device.
9. preparation method according to claim 5, it is characterised in that the firing temperature is 1000~1200 DEG C.
10. the purposes of the high porosity ceramic filtering material described in any one of claim 1-4, be used for flue gas ash removal,
Ultra-fine grain is collected or liquid filtering.
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| CN110898683A (en) * | 2019-10-18 | 2020-03-24 | 三达膜科技（厦门）有限公司 | Preparation method of ceramic filtering membrane |
| CN115215672A (en) * | 2022-08-29 | 2022-10-21 | 南京工业大学 | Preparation method of mullite whisker-based ceramic fiber membrane |
| CN115521158A (en) * | 2022-10-11 | 2022-12-27 | 南京工业大学 | Preparation method of high-air-permeability ceramic fiber filter tube |
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| CN115521158A (en) * | 2022-10-11 | 2022-12-27 | 南京工业大学 | Preparation method of high-air-permeability ceramic fiber filter tube |
| CN115521158B (en) * | 2022-10-11 | 2023-08-18 | 南京工业大学 | Preparation method of high-air-permeability ceramic fiber filter tube |
| WO2024078182A1 (en) * | 2022-10-11 | 2024-04-18 | 南京工业大学 | Preparation method for ceramic fiber filter pipe with high air permeability |
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