CN87106034A - Ceramic foam filter 23 - Google Patents
Ceramic foam filter 23 Download PDFInfo
- Publication number
- CN87106034A CN87106034A CN87106034.5A CN87106034A CN87106034A CN 87106034 A CN87106034 A CN 87106034A CN 87106034 A CN87106034 A CN 87106034A CN 87106034 A CN87106034 A CN 87106034A
- Authority
- CN
- China
- Prior art keywords
- coating
- strainer
- molten metal
- filter
- ceramic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5025—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with ceramic materials
- C04B41/5035—Silica
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
- C04B41/81—Coating or impregnation
- C04B41/85—Coating or impregnation with inorganic materials
- C04B41/87—Ceramics
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B21/00—Obtaining aluminium
- C22B21/06—Obtaining aluminium refining
- C22B21/066—Treatment of circulating aluminium, e.g. by filtration
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/02—Refining by liquating, filtering, centrifuging, distilling, or supersonic wave action including acoustic waves
- C22B9/023—By filtering
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/04—Additives and treatments of the filtering material
- B01D2239/0471—Surface coating material
-
- 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
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention discloses a kind of many bonding ceramic bodies that allow the duct that liquid metal flows through that have, wherein is the shallow layer that one deck inorganic materials is arranged on the whole described ceramic body actually, and this kind coating is easy to by described molten metal institute wetting.
Description
The invention relates to the technology of the ceramic filter body of filtering molten metal, this kind ceramic filter body comprises a kind of many bonding or sintered ceramic base substrates that allow the duct that liquid metal flows through that have.Representational ceramic body is at United States Patent (USP) the 3rd, 893, No. 917,4,081, and No. 371 and 3,962, those base substrates of being narrated in No. 081.
Usually, molten metal contains the deleterious solid that is mingled with of final casting metals product.These are mingled with solid, after molten metal solidifies, in final casting product, are to occur as folder thing thing, and make final product have defective.Inclusion has many sources, for example, and surface oxide film and resemble carbide, boride or the like class insoluble impurities.
Porcelain filter, those porcelain filters of in above-mentioned patent, being narrated for example, be specially adapted to filtering molten metal, especially those porcelain filters, they are called ceramic foam filter, have open-celled structure, it is characterized in that passage to provide song to analyse being provided interconnected space, many inside with described ceramic nethike embrane.Because all reasons, comprising fabulous filtration efficiency, low cost, easily use and can be enough after promptly abandon, so these porcelain filters are useful especially.In view of make ceramic foam filter convenient especially and cheap and can with after promptly abandon, so, in recent years, enlarged their purposes widely.
But special problem for example during steel, has taken place in the molten metal that has low flow in filtration.Have been found that when filtering this class material, often be difficult to make molten metal flow through strainer.This kind situation promptly causes in strainer priming (prime) before, that is, molten metal begins to flow through before the strainer, forms the major part of molten metal on strainer.In addition, have been found that in some cases, molten metal can not pass through whole strainer, or molten metal can not be by all surface of strainer.In addition, in other cases, strainer not can priming, and before the strainer priming, promptly forms excessive molten metal head on strainer.Though for steel, this problem is obvious especially,, for other metals, there is this problem too, its particular case then depends on filtering particular alloy of institute and pouring temperature.
A kind of method that overcomes this problem is with alloy superheat, so that make it have better flowability.Have been found that and overheatedly improve flowability and promote the strainer priming.But overheated is not a kind of terms of settlement that is entirely satisfactory, because the overheated problem that tends to cause other of over-drastic, its particular case then depends on institute's superheated particular alloy.In addition, for head it off, be higher than normally and crossed success always of heat effect.
United States Patent (USP) the 4th, 302 in addition, discloses the coating ceramic foam filter No. 502, and this patent provides a kind of activatory coating that is actually, and is used for removing from molten metal specific impurity.But, the problem of the formation molten metal head that this can not solve above to be discussed.
Therefore, a main purpose of the present invention is, a kind of improvement porcelain filter of filtering molten metal is provided, and this kind strainer can promote the filtration of low flow metal and not have too much molten metal capitiform and become.
Another object of the present invention is, a kind of usefulness improvement porcelain filter that above-mentioned bonding ceramic body is made is provided, and this kind strainer manufacturing cost is cheap, the make efficiency height, and can not disturb the character of filtration step or finished product cast.
A further object of the present invention is, a kind of above-mentioned improved filter is provided, and this kind strainer has been eliminated in order to make the strainer priming needed excessively overheated.
Other purposes of the present invention and advantage will be narrated below.
According to the present invention, have been found that now and can realize above-mentioned purpose and advantage at an easy rate.
The invention provides a kind of high-level efficiency porcelain filter of filtering molten metal, this kind strainer has overcome the low flow metal, the problem of steel and make strainer be easy to priming simultaneously for example, and can not form too much molten metal head and the metallic substance that do not need to be filtered excessively overheated.
Porcelain filter of the present invention, comprise and a kind ofly have many bonding ceramic body, one decks in the duct that liquid metal flows through of allowing and stick to the shallow layer that is actually on the whole described ceramic body, this kind thin layer is made with inorganic materials, thickness is about 5 dusts to 1 micron, be easy to by described molten metal institute wetting, when described coating contacted with described molten metal, in fact this kind coating promptly was removed.Porcelain filter is to have open-celled structure preferably, it is characterized in that the ceramic foam filter that interconnected space, many inside is surrounded with described ceramic nethike embrane.Preferred coat-thickness is 10 to 100 dusts, and for steel, is preferably a kind of silica coating.
As mentioned above, the low flow metal, for example steel can not flow through the ceramic device of crossing at an easy rate, is a problem in present technique field always.This problem is because the material of porcelain filter is not easy to be melted wetting metal and causes, promptly, molten metal can not flow on the surface of filter material or scatters and be caused, for example, for with silicon oxide as the porcelain filter of filtering material, this kind material be not easy by steel wetting.
In ideal conditions, when the material of the major metal that is filtered is not easy wetting filter material, and when wishing the easy really wetting filter material of the inclusion of removing, then can obtain filtration efficiency.For example, the easy really wetting alumina-based ceramic strainer of the aluminate in the steel, but steel is not easy wetting strainer.Therefore, inclusion will inevitably leave molten metal fluid stream and stick on the strainer, and major metal then can still not keep in touch with filter material or inclusion material.In addition, the preferably nonwetting strainer of major metal is because like this, will cause less erosion to filter material.But this just illustrates molten metal after beginning to flow through strainer, i.e. ideal situation after the strainer priming.Therefore, optimal providing a kind ofly can be satisfied these characteristics and the strainer of priming easily simultaneously.Therefore, preferably provide a kind of strainer, this kind strainer is easy to make molten metal to begin to flow through, and desired characteristic that can interference filter or disturb filtration efficiency.
Ceramic body of the present invention is a kind of many bonding or sintered ceramic base substrates that allow the duct that liquid metal flows through that have.Any ceramic body that this type of is suitable for all can be used; for example; extruded ceramic base substrate, sintered ceramic particle or be preferably and have open-celled structure is characterized in that with described ceramic nethike embrane interconnected space, many inside being surrounded so that the ceramic foam filter of tortuous passageway to be provided.Narrated a kind of useful especially ceramic foam filter in No. the 654th, 391, U.S. Patent application series on September 24th, 1984 application, that await the reply simultaneously with patent of the present invention, the present invention is with reference to the content of this patent application.
According to the present invention, on described ceramic body, form one deck shallow layer, this shallow layer sticks on the described ceramic body and is that one deck coating is provided on the whole ceramic body actually.This coating is a kind of inorganic materials, and thickness is about 5 dusts to 1 micron, and it is wetting to be easy to be melted metal institute.In preferred embodiments, the thickness of coating is about 10 to 100 dusts.Therefore, this coating is very thin as can be seen.In addition, this coating is removed when contacting with molten metal, so after molten metal began to flow, this coating promptly was removed, so that favourable filter surfaces is provided.Be preferably, coating promptly owing to be dissolved in the molten metal or because the mechanical effect of molten metal on strainer, and is removed in less than 5 seconds basically.Therefore, be preferably, coating dissolves in or part dissolves in molten metal.In order when molten metal begins to flow through strainer, to be convenient to promptly remove easily coating, be preferably the coating of applied thickness less than 100 dusts; But certainly the thickness coating that reaches 1 little class also can be used, if when especially relying on mechanical effect to remove this coating, just more can applied thickness reach 1 micron coating.
As mentioned above, in fact coating should cover whole ceramic body; But, do not need ceramic body is covered equably, do not need whole ceramic nethike embrane is all covered coating yet, therefore, it is admissible that unlapped surface is arranged.But, in order to promote the strainer priming, in fact coating should cover whole ceramic nethike embrane, and preferably should be actually uniform.
Coated material should be to the molten metal that is filtered or the harmless material of product of finally casting.Therefore, preferably utilize coating to be dissolved in or to be partially soluble in the method for molten metal, rather than utilize the method for mechanical separation that coating is removed from ceramic nethike embrane, because can enter final casting and become inclusion with the mechanical isolating coating of method.In addition, the material of coating should not produce injurious effects to molten metal, for example, reduces mechanical property, crystal grain is too much or undesirable second phase.
In preferred embodiments, use the colloidal silica coating, because have been found that this kind colloidal silica is particularly conducive to the filtration of steel and on ceramic body, form the needed silica coating of one deck.In view of the coating that is application of thin on ceramic body, so silica coating is no harmful effect to the steel that is filtered, but, a large amount of silicon oxide have harmful effect.In addition, thin silicon oxide coating of the present invention when contacting with molten steel, is easy to remove.
In this preferred embodiment, using the concentration of colloidal silica in water is 1/2 to 10%, is preferably about 1% colloidal silica water dispersion.Certainly, can use additive in water dispersion, for example wetting agent, dispersion agent or organic materials are with effect and other performances that improve coating.
According to this preferred embodiment, prepare above-mentioned dispersion, and ceramic body soaked one short period in this dispersion, in fact on whole ceramic body, be covered with one deck shallow layer to provide, get rid of unnecessary dispersion, to wet ceramic body at for example about 200 °F to 300 °F (93 ℃ to 149 ℃), it is dry down to be preferably 250 °F (121 ℃), and then, be preferably about 1823 °F (1000 ℃) and carry out rebake at about 1800 °F to 1900 °F (982 ℃ to 1038 ℃).Treatment temp should be enough high, makes silicon oxide can not carry out aquation again and also stick on the ceramic body securely.Can carry out drying and rebake with the mode of step of separating or operate continuously.And do not need to remain under a certain temperature.Have been found that this kind coated material is to the filtrate steel particularly advantageous.
Certainly, coating that can not the too high storing temperature of application need is because the too high composition that can destroy the certain ceramics base substrate of storing temperature.
But, certainly, except that silicon oxide, also can use other material, as long as this kind material be a kind of be easy to be melted metal wetting and inorganic materials that when contacting, can be removed with molten metal.In the process of filtrate steel, silicon oxide is particularly preferred, and is wetting and be easy to be melted dissolving metal by steel because it is very easy to.Adaptable representational other inorganic materials comprise, resemble the silicate cement dispersion of water glass one class and such as the salt of sodium-chlor or calcium chloride one class, wherein back one class salt can be dry simply on ceramic nethike embrane and needn't carry out rebake.In addition, can also use oxide compound, for example the oxide compound of calcium and magnesium at first can deposit the form of these oxide compounds with salt, the form of carbonate for example, and then carry out drying and rebake, and form oxide compound.Also can use metal, at first the form of these metals with organo-metallic solution or dispersion can be coated with, and then carry out drying and baking, and form metal such as nickel, iron and chromium one class.Because these metals used quantity in coating is considerably less, so they do not have disadvantageous effect to molten metal.
The key of the effectiveness of coating composition of the present invention is to have used one deck is melted inorganic materials wetting metal and that remove easily easily under the effect of molten metal shallow layer.Therefore, if use preferred ceramic foam material, because coating is easy to be melted wetting metal, so molten metal just is easy to by ceramic body and by the tortuous passageway on the ceramic body, thereby has shortened the priming time of porcelain filter significantly and reduced the formation of molten metal major part significantly.
In addition, have been found that this kind coating composition has not only just shortened the priming time of strainer really.Have been found that this kind precoated filter also makes us unexpectedly promoting filtration procedure to be finished more rapidly, that is, the flow velocity of the total molten metal by coating ceramic base substrate of the present invention is general than the height that passes through no coating ceramic base substrate.Therefore, after the strainer priming, make us unexpectedly, precoated filter of the present invention can keep the flow velocity higher than no precoated filter, although coating is removed when contacting with molten metal.This situation may be because the priming more promptly of whole ceramic filter body and in the ceramic filter body all primings more promptly of micropore cause.
From the following example of lifting, the advantage that can easily understand the present invention and be caused.
Example 1
It is 3/4 inch bonding ceramic filter body that thickness with open-celled structure is provided, and it is characterized in that with ceramic nethike embrane interconnected space, many inside being surrounded, and wherein filter body is as basic material with alumina-ceramic.The feature of applied certain filter is that per inch has 25 micropores.The method according to this invention, filter body is soaked one short period in the water dispersion that contains 1% colloidal silica, come the strainer sample is coated with, to guarantee in fact to have carried out flooding completely and obtaining aforesaid shallow layer, toast in 250 (121 ℃) drying with at 1832 °F (1000 ℃) then.After the baking, coat-thickness is about 10 dusts, is on the whole ceramic body actually, and coating is that the silicon oxide particle form with bunchiness exists.The sample bonding of precoated filter and no precoated filter is become the hollow priming pipe of 2 inch diameters.Each priming pipe is immersed in the Al deoxidization steel bath lentamente, and remain under 2950 °F (1621 ℃).The visual observation Al deoxidization steel flows through tube hub, determines when the beginning priming.Test-results shows, precoated filter immersed Al deoxidization steel in bathing during about 2 inches degree of depth, and priming begins immediately.Not having precoated filter does not then have priming and takes place when soaking about 2 inches degree of depth.When the no precoated filter of this kind is immersed into about 4 inches again, so owing to thermal shocking makes pipe break.All the time not observed strainer priming phenomenon in no precoated filter takes place.
Example 2
Use the coating of the method preparation of in fact pressing example 1, provide to be actually precoated filter and the no precoated filter of forming shown in the example 1.With thickness is that 3/4 inch precoated filter and no precoated filter are placed in the bottom pour mold tundish (bottom pour tundish) abreast.Molten steel is directly put into cast tundish (pouring tundish) from the induction furnace of 2950 (1621 ℃).When the perfusion tundish, the metallostatic pressure on the strainer promptly increases thereupon, till the molten metal liquid level reaches the overflow port height.Visual observation filter outlet one side is determined time of strainer priming.Test-results shows that precoated filter was than the Zao priming of no precoated filter 4 to 5 seconds.The molten metal flow that flows through precoated filter is fairly good; The molten metal that flows through no precoated filter is suitable viscous and slowly then.Behind casting complete, the molten metal by precoated filter has 169 pounds, and only has 25 pounds by the molten metal of no precoated filter.In addition, the quality height of resulting foundry goods, and also the coating on strainer there is no harmful effect to foundry goods.Moreover silica coating is actually by molten metal and removes after with its dissolving when contacting with molten metal.
Example 3
Press the method for example 1, preparation is actually precoated filter and the no precoated filter of forming shown in the example 1, but the feature of filter body is a per inch 15 micropores is arranged.Prepare 4 sand mo(u)lds, wherein have three filter for installation is housed.450 pounds of aluminium deoxidation medium carbon steel are directly poured into these 4 sand mo(u)lds from induction furnace.The results are shown in table 1.
Table 1
Casting test number test conditions teeming temperature, result
The 2950 strainer primings of 1 precoated filter
Cast(ing) surface is clean
2 no strainers 2910 have at cast(ing) surface
A large amount of slag inclusions
3 no precoated filter 2950 strainers can not priming
The 2904 strainer part primings of 4 precoated filters
The above results clearly illustrates that the casting test 1 of application of coatings strainer have the cast(ing) surface that does not have inclusion fully, and the not casting of fixed filter test 2 has a large amount of inclusiones on the cast(ing) surface.The casting test 3 of no coating filter is housed, even pour into a mould under the temperature of casting test 1, strainer also fully can not priming.The casting test 4 of application of coatings strainer, even pouring temperature hangs down 46 °F, strainer also can the part priming.
Under the condition of spirit of the present invention or principal character, can implement the present invention with other mode or method.Therefore, no matter from which point, all should think the present embodiment just to the explanation rather than the restriction of scope of the present invention pointed in the appended claims, all variations that are included in purpose of the present invention and the equivalent scope all should be included in the present invention.
Claims (6)
1, the porcelain filter of filtering molten metal, have many bonding ceramic body, one decks in the duct that liquid metal flows through of allowing and stick to the shallow layer that is actually on the whole described ceramic body comprising a kind of, this kind shallow layer is made with inorganic materials, thickness is about 5 dusts to 1 micron, be easy to by described molten metal institute wetting, when described coating contacts with described molten metal, introduce a fine variety coating and promptly in fact be removed.
2, according to the strainer of claim 1, wherein said ceramic body is to have open-celled structure, it is characterized in that the ceramic foam filter that interconnected space, many inside is surrounded with described ceramic nethike embrane.
3, according to the strainer of claim 1, the thickness of wherein said coating is about 10 to 100 dusts.
4, according to the strainer of claim 1, it is uniform that wherein said coating is actually.
5, according to the strainer of claim 1, wherein said coating is a silica coating.
6, according to the strainer of claim 1, wherein said ceramic body comprises aluminum oxide.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US90143286A | 1986-08-28 | 1986-08-28 | |
| US901,432 | 1986-08-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN87106034A true CN87106034A (en) | 1988-03-16 |
| CN1011486B CN1011486B (en) | 1991-02-06 |
Family
ID=25414177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN87106034A Expired CN1011486B (en) | 1986-08-28 | 1987-08-27 | Ceramic foam filter 23 |
Country Status (9)
| Country | Link |
|---|---|
| EP (1) | EP0280695A1 (en) |
| JP (1) | JPS63503289A (en) |
| CN (1) | CN1011486B (en) |
| AU (1) | AU598025B2 (en) |
| BR (1) | BR8707442A (en) |
| DK (1) | DK227988A (en) |
| ES (1) | ES2005272A6 (en) |
| WO (1) | WO1988001532A1 (en) |
| ZA (1) | ZA876106B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102413895A (en) * | 2010-03-19 | 2012-04-11 | 福塞科国际有限公司 | Method for production of refractory filter |
| CN104826391A (en) * | 2015-04-21 | 2015-08-12 | 安徽凤凰滤清器股份有限公司 | Nanometer-ceramic-powder-base adsorption filtering agent and preparation method thereof |
| CN110981539A (en) * | 2019-12-30 | 2020-04-10 | 武汉科技大学 | Magnesium oxide based filter containing functional coating multi-pore structure and preparation method thereof |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2599990B1 (en) * | 1986-03-19 | 1993-03-26 | Ceramiques Composites | FILTER FOR LIQUID METALS BASED ON ALVEOLAR CERAMIC MATERIAL, ITS PREPARATION METHOD AND ITS APPLICATION TO THE FILTRATION OF METALS OR LIQUID ALLOYS OF VERY HIGH MELTING POINT |
| KR20020024367A (en) * | 2000-09-25 | 2002-03-30 | 김희영 | Drilling device for animal surgery and connecting shift thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5556077A (en) * | 1978-10-21 | 1980-04-24 | Bridgestone Tire Co Ltd | Ceramic porous body |
| US4395333A (en) * | 1982-04-14 | 1983-07-26 | Groteke Daniel E | Pre-wet and reinforced molten metal filter |
| GB8322020D0 (en) * | 1983-08-16 | 1983-09-21 | Alcan Int Ltd | Filtering molten metal |
| JPS60106514A (en) * | 1983-11-14 | 1985-06-12 | Toyota Motor Corp | Ceramic filter for collecting fine particle |
| JPS61117182A (en) * | 1984-11-08 | 1986-06-04 | 株式会社ブリヂストン | Porous ceramic structure |
-
1987
- 1987-08-14 JP JP62504572A patent/JPS63503289A/en active Pending
- 1987-08-14 WO PCT/CH1987/000100 patent/WO1988001532A1/en not_active Application Discontinuation
- 1987-08-14 EP EP87904834A patent/EP0280695A1/en not_active Withdrawn
- 1987-08-14 AU AU77844/87A patent/AU598025B2/en not_active Ceased
- 1987-08-14 BR BR8707442A patent/BR8707442A/en unknown
- 1987-08-18 ZA ZA876106A patent/ZA876106B/en unknown
- 1987-08-25 ES ES8702467A patent/ES2005272A6/en not_active Expired
- 1987-08-27 CN CN87106034A patent/CN1011486B/en not_active Expired
-
1988
- 1988-04-26 DK DK227988A patent/DK227988A/en not_active Application Discontinuation
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102413895A (en) * | 2010-03-19 | 2012-04-11 | 福塞科国际有限公司 | Method for production of refractory filter |
| US8802003B2 (en) | 2010-03-19 | 2014-08-12 | Foseco International Limited | Method for the production of a refractory filter |
| CN102413895B (en) * | 2010-03-19 | 2014-11-19 | 福塞科国际有限公司 | Method for production of refractory filter |
| US9518307B2 (en) | 2010-03-19 | 2016-12-13 | Foseco International Limited | Method for the production of a refractory filter |
| CN104826391A (en) * | 2015-04-21 | 2015-08-12 | 安徽凤凰滤清器股份有限公司 | Nanometer-ceramic-powder-base adsorption filtering agent and preparation method thereof |
| CN110981539A (en) * | 2019-12-30 | 2020-04-10 | 武汉科技大学 | Magnesium oxide based filter containing functional coating multi-pore structure and preparation method thereof |
| CN110981539B (en) * | 2019-12-30 | 2021-11-16 | 武汉科技大学 | Magnesium oxide based filter containing functional coating multi-pore structure and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| ES2005272A6 (en) | 1989-03-01 |
| BR8707442A (en) | 1988-11-01 |
| DK227988D0 (en) | 1988-04-26 |
| WO1988001532A1 (en) | 1988-03-10 |
| ZA876106B (en) | 1988-02-23 |
| CN1011486B (en) | 1991-02-06 |
| AU7784487A (en) | 1988-03-24 |
| DK227988A (en) | 1988-04-26 |
| JPS63503289A (en) | 1988-12-02 |
| EP0280695A1 (en) | 1988-09-07 |
| AU598025B2 (en) | 1990-06-14 |
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