GB2296079A - Refractory ceramic component - Google Patents
Refractory ceramic component Download PDFInfo
- Publication number
- GB2296079A GB2296079A GB9524876A GB9524876A GB2296079A GB 2296079 A GB2296079 A GB 2296079A GB 9524876 A GB9524876 A GB 9524876A GB 9524876 A GB9524876 A GB 9524876A GB 2296079 A GB2296079 A GB 2296079A
- Authority
- GB
- United Kingdom
- Prior art keywords
- refractory
- carrier material
- component
- bandage
- sections
- 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.)
- Withdrawn
Links
- 239000011214 refractory ceramic Substances 0.000 title claims abstract description 10
- 239000012876 carrier material Substances 0.000 claims abstract description 21
- 239000011248 coating agent Substances 0.000 claims abstract description 10
- 238000000576 coating method Methods 0.000 claims abstract description 10
- 239000011819 refractory material Substances 0.000 claims abstract description 7
- 238000001035 drying Methods 0.000 claims abstract description 6
- 238000010304 firing Methods 0.000 claims abstract description 3
- 239000000126 substance Substances 0.000 claims description 10
- 238000005496 tempering Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 2
- 238000009834 vaporization Methods 0.000 claims description 2
- 238000001704 evaporation Methods 0.000 abstract 1
- 230000008020 evaporation Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 9
- 239000011261 inert gas Substances 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 229910052602 gypsum Inorganic materials 0.000 description 2
- 239000010440 gypsum Substances 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/50—Pouring-nozzles
- B22D41/52—Manufacturing or repairing thereof
- B22D41/54—Manufacturing or repairing thereof characterised by the materials used therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/14—Closures
- B22D41/16—Closures stopper-rod type, i.e. a stopper-rod being positioned downwardly through the vessel and the metal therein, for selective registry with the pouring opening
- B22D41/18—Stopper-rods therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/30—Producing shaped prefabricated articles from the material by applying the material on to a core or other moulding surface to form a layer thereon
- B28B1/40—Producing shaped prefabricated articles from the material by applying the material on to a core or other moulding surface to form a layer thereon by wrapping, e.g. winding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B19/00—Machines or methods for applying the material to surfaces to form a permanent layer thereon
- B28B19/0038—Machines or methods for applying the material to surfaces to form a permanent layer thereon lining the outer wall of hollow objects, e.g. pipes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B21/00—Methods or machines specially adapted for the production of tubular articles
- B28B21/42—Methods or machines specially adapted for the production of tubular articles by shaping on or against mandrels or like moulding surfaces
- B28B21/48—Methods or machines specially adapted for the production of tubular articles by shaping on or against mandrels or like moulding surfaces by wrapping, e.g. winding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/34—Moulds, cores, or mandrels of special material, e.g. destructible materials
- B28B7/342—Moulds, cores, or mandrels of special material, e.g. destructible materials which are at least partially destroyed, e.g. broken, molten, before demoulding; Moulding surfaces or spaces shaped by, or in, the ground, or sand or soil, whether bound or not; Cores consisting at least mainly of sand or soil, whether bound or not
Abstract
The refractory ceramic component consists, at least partially, of sections (20) with wound, bandage-like structure, and is composed of sections (20) incorporating hollow spaces (30) within the refractory material; these spaces having been formed by evaporation or burning of a carrier material or a coating on a carrier material, after drying, hardening or firing the component.
Description
1 REFRACTORY CERAMIC COMPONENT 2296079 The invention relates to a
refractory ceramic component which is designed, for example, as a shroud, immersion pipe, lance, monobloc stopper or the like, the said refractory ceramic component consisting, at least in sections, of sections wound in a bandage-like manner.
A component of this kind is known, inter alia, f rom DE 29 33 143 C2 in the form of a lance tube for blowing in oxygen, nitrogen and/or argon. In that instance, a steel tube is wrapped around with one or more layers of refractory fibre cord, or net, tape or cloth, and then saturated with a slurry-like or paste-like mixture of refractory substance and water glass solution. After the drying of the first layer, a second layer of refractory substance and binding agent is applied, which soaks into the refractory fibrous net.
This is intended to effect an increase in resistance to wear and resistance to thermal shock in lance tubes of this kind.
This, at least partial structure, which is wound in a bandage-like manner, for a refractory ceramic component has the advantage that high mechanical stability is achieved with the aid of the carrier substance (for example a refractory fibre net). In the case of a lance tube, for example, the carrier substance acts like armouring inside the refractory covering.
The object of the invention is to further develop the aforesaid technology and make it available to new areas of application.
In doing so, the invention starts out from the following consideration: There is a multitude of areas of application in which an objective or subjective imperviousness (density) 2 of the refractory substance is desired, at least in certain sections. These include, for example, shrouds wherein the admission of oxygen into the pouring jet must be prevented. According to DE 93 18 726 Ul and EP 0 065 514 Bl, the shrouds are provided, for this purpose, with an outer, gastight metal tube. The latter at the same time fulfils the function of preventing the shadow tube from disintegrating, even in the event of cracks in the inner refractory lining.
In other applications, for example gas purging plugs, imperviousness of the refractory substance is required, insofar as the processing gas flowing through the gas purging plug is not to diffuse laterally.
The invention has recognized that the two aforesaid, completely different objectives can be fulfilled by a refractory ceramic component that consists, at least partially, of sections wound in a bandage-like manner and has the following features:
The sections wound in a bandage-like manner have cavities extending inside the refractory substance and achieved by vaporising or burning-out of a suitable carrier material or of a coating applied to the carrier material, after the drying, tempering or firing of the component.
In other words: in the manufacture of a refractory ceramic component according to the invention, the said component is formed, at least partially, by sections wound in a bandagelike manner. Under these circumstances, the "bandage" has a carrier material which - in a similar way to that in which a gypsum bandage is coated with gypsum - is coated on one or both sides with a refractory compound. The corresponding sections are then manufactured with the bandage by suitable winding operations and the component is then dried, tempered or fired.
3 It is true that, if a carrier material is used which can be burned out at these temperatures, the aforesaid armouring function is eliminated; at the same time, however, In-sItu cavities are made available which can then be connected to an external gas feed line and via which a processing gas, for example an inert gas, can be fed in.
An alternative form of embodiment provides a carrier material of a refractory material, for example ceramic fibres with a coating which vaporizes or burns out during the drying, tempering or calcining of the component and around which, in turn, a refractory paste, refractory mortar or the like is made up. Optionally, the coating may even be formed by the refractory paste or the mortar itself. In these cases, the carrier material is preserved during the drying, tempering or calcining of the component, but the said coating shrinks, vaporizes or burns out, so that tubelike cavities, which - in a manner analogous to that which has been described above - can in turn be connected to an external gas source, are formed in the refractory substance around the carrier material.
In the form of embodiment last mentioned, there is the advantage that the carrier material keeps its armouring function and stabilizes the component as a whole, both thermally and mechanically, even under the temperatures that occur during use.
In the case of a shroud, such as has been described above, the design according to the invention has the advantage that no outer metal tube is necessary any more. Mechanical stabilization is undertaken by the carrier material. The infiltration of oxygen is prevented through the fact that the cavities described are connected to an inert gas source which conducts a flow of inert gas through the cavities during use and prevents oxygen from being sucked in towards the pouring jet.
4 While the cavities described have a "passive" function in the case of the aforesaid example of embodiment, the same principle can also be used, for example, in the case of a gas plug, where the cavities then have an "active" function, namely the feeding of a processing gas into molten metal. The scope of the invention includes the selection, in dependence upon the application in question, of the carrier material, its type and size and the coating material.
For numerous areas of application it seems expedient to design the carrier material in a net-like manner (two or three dimensionally), so that correspondingly a net-like pore system is also constructed in the component, that is to say either by the burning-out of the carrier substance or by the shrinking, vaporizing or burning-out of the coating applied to the carrier material. The said coating may, f or example, consist of a synthetic resin or of wax.
However, a carrier material in the form of cords, coils or the like may also be used, depending upon the application in question. The invention is not subject to limitations of any kind in this respect.
What is crucial is that the cavities are constructed by, or around, the carrier material in the refractory material and extend in sections of the component which have been wound in a bandage-like manner in the way described.
In the case of a shroud, for example, it may be expedient to manufacture the inner part conventionally by casting or pressing and to put a section, which has been wound in a bandage-like manner, onto the inner part. This section increases the operational reliability of the shroud as a whole, and does so even when cracks, for example, occur in the inner part, these being hindered by the bandage from spreading outwards, as a result of which the undesirable admission of air from outside is also hindered.
The laminate form of construction produced by winding makes it possible to include freely selectable refractory components which can be adapted to the stressing profile. The selection of the refractory material is, once again, guided by the application in question. Refractory oxides, such as alumina, zirconium oxide or magnesium oxide, are among typical sorts of refractory materials which may be used according to the invention.
The invention will be explained in greater detail below with reference to the manufacture of a shroud.
In this case, an inner section of the shroud is first of all manufactured in the conventional manner, by casting or pressing. Onto this inner part there is then wound a bandage which is constructed as follows: it has a net-like carrier material made of alumina fibres which are coated with a wax and integrated in a refractory slurry made of alumina. The bandage is wound crosswise onto the inner part and the component thus manufactured is then dried, tempered and/or calcined, during which process there occurs vaporization of the wax coating and thus channel like cavities around the net structure of the carrier are formed. Finally, a central gas feed line, through which an inert gas such as argon is fed during use, is connected to the pores, preferably at the inlet end of the shroud.
The accompanying diagrammatic drawing illustrates a shroud of this kind, the inner, cast section of which bears the reference number 10, while its outer, wound section bears the reference number 20, the pores, which extend in a netlike manner, being marked diagrammatically with the reference number 30, and the central inert gas connection with the reference number 40.
6
Claims (7)
- Refractory ceramic component that consists, at least partially, of sections wound in a bandage-like manner with the following features:the sections wound in a bandage-like manner have cavities extending within the refractory material which have been formed, by material vaporisation or burning out of a suitable carrier material or of a coating applied to the carrier substance, after the drying, tempering or firing of the component.
- 2. Component according to claim 1, wherein the cavities can be connected to a gas feed line.
- 3. Component according to claim 1 or 2, wherein the carrier material or the cavities have the form of cords, annular ducts, or nets.
- 4. Component according to one of claims 1 to 3, wherein the carrier material consists of a refractory material.
- 5. Component according to claim 4, wherein the carrier material consists of refractory fibres.
- 6. Component according to one of claims 1 to 5, wherein the sections which are wound in a bandage-like manner extend on a cast or pressed refractory section.
- 7. Refractory ceramic component, substantially as herein described with reference to the accompanying drawing.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4443554A DE4443554C1 (en) | 1994-12-07 | 1994-12-07 | Refractory ceramic component |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB9524876D0 GB9524876D0 (en) | 1996-02-07 |
| GB2296079A true GB2296079A (en) | 1996-06-19 |
Family
ID=6535160
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9524876A Withdrawn GB2296079A (en) | 1994-12-07 | 1995-12-05 | Refractory ceramic component |
Country Status (5)
| Country | Link |
|---|---|
| BE (1) | BE1010102A4 (en) |
| DE (1) | DE4443554C1 (en) |
| FR (1) | FR2727884A1 (en) |
| GB (1) | GB2296079A (en) |
| IT (1) | IT1277034B1 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB663537A (en) * | 1947-06-14 | 1951-12-27 | Philips Nv | Improvements in or relating to the manufacture of thermal regenerators |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE446283C (en) * | 1926-10-16 | 1927-06-30 | Ferdinand Raesch | Forming needle and needle for the production of converter floors |
| US2671939A (en) * | 1950-04-28 | 1954-03-16 | Nat Clay Pipe Res Corp | Method and apparatus for forming tubular ceramic bodies |
| GB895700A (en) * | 1958-11-11 | 1962-05-09 | Elettrocarbonium Spa | Method for the production of a carbon tube |
| CA1130560A (en) * | 1978-08-28 | 1982-08-31 | Yoshihiro Hayashi | Lance pipe for refining and refining process of molten metal |
| JPS6417408A (en) * | 1987-07-13 | 1989-01-20 | Oki Electric Ind Co Ltd | Manufacture of ceramic coil |
| WO1991015438A1 (en) * | 1990-03-31 | 1991-10-17 | Ngk Insulators, Ltd. | Ceramic high-temperature member |
| DE4039232C2 (en) * | 1990-12-08 | 1995-01-19 | Didier Werke Ag | Process for producing a gas purging plug and gas purging plug |
| DE4312988A1 (en) * | 1993-04-21 | 1994-10-27 | Didier Werke Ag | Refractory ceramic moulding and production process |
-
1994
- 1994-12-07 DE DE4443554A patent/DE4443554C1/en not_active Expired - Fee Related
-
1995
- 1995-12-05 GB GB9524876A patent/GB2296079A/en not_active Withdrawn
- 1995-12-05 IT IT95MI002553A patent/IT1277034B1/en active IP Right Grant
- 1995-12-06 FR FR9514395A patent/FR2727884A1/en active Pending
- 1995-12-07 BE BE9501008A patent/BE1010102A4/en not_active IP Right Cessation
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB663537A (en) * | 1947-06-14 | 1951-12-27 | Philips Nv | Improvements in or relating to the manufacture of thermal regenerators |
Also Published As
| Publication number | Publication date |
|---|---|
| BE1010102A4 (en) | 1997-12-02 |
| IT1277034B1 (en) | 1997-11-04 |
| GB9524876D0 (en) | 1996-02-07 |
| DE4443554C1 (en) | 1996-03-21 |
| ITMI952553A0 (en) | 1995-12-05 |
| FR2727884A1 (en) | 1996-06-14 |
| ITMI952553A1 (en) | 1997-06-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102575542B (en) | Mounting mat for exhaust gas treatment device | |
| CA1168587A (en) | Catalytic converter mounting arrangement and method of reducing bypass leakage | |
| ES2527662T3 (en) | Support element for fragile structures such as catalytic converters | |
| US6596372B2 (en) | Ceramic honeycomb structural body and methods of preparing the same | |
| UA79272C2 (en) | Process for protection of article of composition material from oxidation and the article of composition material with protective antioxidizing coating | |
| JP2015158204A (en) | Multiple layer mat and exhaust gas treatment device | |
| JP3449983B2 (en) | Ceramic hot gas filter and method of manufacturing the same | |
| JP7414218B2 (en) | Method of forming self-healing ceramic matrix composite material components, and ceramic matrix composite material components | |
| US4770930A (en) | Multilayered thermal insulation formed of zirconia bonded layers of zirconia fibers and metal oxide fibers and method for making same | |
| GB2296079A (en) | Refractory ceramic component | |
| JP2001328886A (en) | Highly serviceable heat-insulating material and method for producing the same and use thereof and method for working the same | |
| GB2103331A (en) | Heat-insulating casing for elongate constructional parts | |
| CA1204934A (en) | Devices for introducing gases into metallurgical vessels | |
| CA2205632A1 (en) | Impregnated ceramic riser tube and method of manufacturing same | |
| CA2268019A1 (en) | A method for manufacturing a ceramic composite material | |
| US4953762A (en) | Pouring tubes | |
| US5072864A (en) | Carbon-containing wearable refractory parts | |
| EP1492639B1 (en) | Thermal shock resistant casting element and manufacturing process thereof | |
| JPH04183774A (en) | Friction material | |
| JPS57105243A (en) | Catalyst for catalytic combustion and preparation thereof | |
| JPH11335183A (en) | Ceramic composite and heat-resistant member using the same | |
| JP2003053166A (en) | Method for making dense porous ceramic hollow fiber membrane | |
| US20150198371A1 (en) | Refractory ceramic gas purging plug and a process for manufacturing said gas purging plug | |
| JP2022129451A (en) | Carbon-based heat-resistant pipe, manufacturing method thereof, and in-furnace temperature detection device using the same | |
| CN109763899A (en) | High temperature acoustic lining |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |