EP0916436B1 - Monolithischer, feuerfester, keramischer Lochstein - Google Patents
Monolithischer, feuerfester, keramischer Lochstein Download PDFInfo
- Publication number
- EP0916436B1 EP0916436B1 EP98121035A EP98121035A EP0916436B1 EP 0916436 B1 EP0916436 B1 EP 0916436B1 EP 98121035 A EP98121035 A EP 98121035A EP 98121035 A EP98121035 A EP 98121035A EP 0916436 B1 EP0916436 B1 EP 0916436B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sections
- nozzle brick
- ceramic
- perforated
- brick according
- 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.)
- Expired - Lifetime
Links
Images
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
- B22D41/08—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like for bottom pouring
Definitions
- the invention relates to a monolithic refractory ceramic perforated brick with a first, upper end face and a second, lower end face, and one Through opening between the end faces.
- Such a perforated stone is used, for example, to accommodate one Gas Swsteines.
- the through opening has - analogous to the shape of the gas purging plug - often one Truncated cone shape.
- Perforated stones of the type mentioned are also part of Slider locks known.
- a perforated brick (see e.g. EP-A-352 353) consists of one or more less dense ceramic matrix.
- the perforated brick can poured, pounded or pressed.
- the perforated brick is placed in a wall or a floor metallurgical melting vessel, for example a Steel ladle, built-in, mostly mortared.
- the one (Upper) face of the perforated brick is according to the Facing molten metal. This end is also called that called “hot end”.
- the opposite, after the Installation of the outer end of the perforated brick is the so-called “cold end”.
- a perforated brick is known, which in one metallurgical vessel can be used.
- the Perforated brick itself can be used with a pouring nozzle.
- Perforated stones are made of spouts (as in EP-A-135482 described) to distinguish. The latter are used for flow of molten metal.
- the invention is based on the object, one To offer perforated brick of the type mentioned, the less sensitive is against crack formation and its service life conventional perforated stones is improved.
- the invention is based on the knowledge that this Task to be solved in an incredibly simple way can, by the perforated stone - radially to the central longitudinal axis of the Through opening viewed - from different ceramic materials is built.
- a total monolithic, for example cast or stamped Perforated stone is available which includes ceramic Matrix material from different sections (zones) different materials (types).
- thermal shock resistance includes for example the thermal shock resistance, the Corrosion resistance, thermal conductivity, the Degree of sintering, density or the like.
- a relatively dense layer follows one less dense layer in which a crack towards the dense layer runs, so the crack progress at Reaching the denser layer spontaneously interrupted or slowed down.
- the invention relates to its most general Embodiment a monolithic ceramic perforated brick with a first, upper end face and a second, lower end face and a through opening between the end faces, made of its refractory ceramic matrix at least two, in the radial direction (perpendicular to the Center longitudinal axis of the through opening) side by side arranged sections from different ceramic Materials.
- the ceramic materials of the Sections in particular in their physical properties differ.
- the sections mentioned can be between the End faces run. Since the crack formation - as stated - but especially in that of the first (upper) end face neighboring section is also observed, the mentioned sections in this area of the perforated brick to arrange and for example the lower part of the perforated brick (adjacent to the lower end face) continuously from and to design the same ceramic matrix material.
- Sections To effectively influence crack propagation should reach the minimum thickness (radial to Considered the central longitudinal axis of the through opening) mentioned sections are 1 cm. As a rule, the Sections have a thickness of several cm each.
- the sections can - in the direction of the central longitudinal axis of the Through opening viewed - straight (flat) surfaces exhibit.
- the sections are stepped between the end faces. On in this way there is an additional influence on a any crack propagation and its positive guidance at least in sections in the axial direction.
- These separators can for example, have a cylindrical shape. you will be spaced from the template for the through opening or to the inner walls of the mold and spaced arranged to each other. This way, different ones Zones formed, which then with different ceramic materials. It offers it to use ceramic casting compounds, albeit for example, ramming compounds can also be used.
- the Separators After the mold has been filled in this way, the Separators, provided they are not made from a combustible Material exist, pulled out again so that the refractory ceramic materials in adjacent zones lie directly next to each other.
- the reference number 10 denotes a perforated brick all in all. Like every perforated brick, the ones in the Figures shown perforated stones a central Through opening 12, which here has a truncated cone shape and the later inclusion of a correspondingly shaped one Gas flushing stone is used. The central longitudinal axis of the Through opening 12 bears the reference number 14.
- the perforated stones 10 a square base, whose outer walls with 10a to d are marked.
- the perforated brick 10 consists of a monolithic Refractory ceramic body 16, which according to Figures 1, 2nd in two sub-zones 16.1 (adjacent to the passage opening 12) and 16.2 (adjacent the outer walls 10a to d) is.
- zone 16.1 inside - is the shape of a truncated cone Outer wall of section 16.1 cylindrical.
- a dotted line marks the border area to the outside Section 16.2 shown.
- Sections 16.1 and 16.2 are in fact immediate to each other and form a common, continuous, monolithic matrix.
- Figures 3, 4 differs differs from that of Figures 1, 2 in that the monolithic Body 16 is divided into a total of three zones here are marked with 16.1, 16.2 and 16.3.
- the perforated brick corresponds to the Figures 3, 4 essentially that of Figures 1, 2, wherein here however an additional interface between the Layers 16.2 and 16.3 is formed.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Laminated Bodies (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Filtering Materials (AREA)
- Catalysts (AREA)
Description
- Figur 1:
- einen vertikalen Längsschnitt durch eine erste Ausführungsform eines Lochsteins,
- Figur 2:
- eine Aufsicht auf den Lochstein nach Figur 1,
- Figur 3:
- einen vertikalen Längsschnitt durch eine zweite Ausführungsform eines Lochsteins,
- Figur 4:
- eine Aufsicht auf den Lochstein nach Figur 3.
Claims (8)
- Monolithischer feuerfester keramischer Lochstein (10) mit einer ersten, oberen Stirnfläche (20) und einer zweiten, unteren Stirnfläche (22) sowie einer Durchgangsöffnung (12) zwischen den Stirnflächen (20, 22), dessen feuerfeste keramische Matrix (16) aus mindestens zwei, in Radialrichtung - senkrecht zur Mittenlängsachse (14) der Durchgangsöffnung (12) - nebeneinander angeordneten Abschnitten (16.1, 16.2, 16.3) aus unterschiedlichen keramischen Werkstoffen besteht.
- Lochstein nach Anspruch 1, bei dem sich die keramischen Werkstoffe der Abschnitte (16.1, 16.2, 16.3) in ihren physikalischen Eigenschaften unterscheiden.
- Lochstein nach Anspruch 2, bei dem sich die keramischen Werkstoffe der Abschnitte (16.1, 16.2, 16.3) in ihrem Gefüge unterscheiden.
- Lochstein nach Anspruch 2, bei dem sich die keramischen Werkstoffe der Abschnitte (16.1, 16.2, 16.3) hinsichtlich ihrer Versinterungstemperatur unterscheiden.
- Lochstein nach Anspruch 1, bei dem sich die keramischen Werkstoffe der Abschnitte (16.1, 16.2, 16.3) in ihrem chemisch mineralogischen Aufbau unterscheiden.
- Lochstein nach Anspruch 1, bei dem die Abschnitte (16.1, 16.2, 16.3) durchgehend zwischen den Stirnflächen (20, 22) verlaufen.
- Lochstein nach Anspruch 1, bei dem jeder Abschnitt (16.1, 16.2, 16.3) eine Mindestdicke - radial zur Mittenlängsachse (14) der Durchgangsöffnung (12) - von 1 cm aufweist.
- Lochstein nach Anspruch 1, bei dem die Abschnitte (16.1, 16.2, 16.3) zwischen den Stirnflächen (20, 22) umfangseitig Abstufungen aufweisen.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19750039A DE19750039C1 (de) | 1997-11-12 | 1997-11-12 | Monolithischer, feuerfester, keramischer Lochstein |
DE19750039 | 1997-11-12 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0916436A1 EP0916436A1 (de) | 1999-05-19 |
EP0916436B1 true EP0916436B1 (de) | 2003-10-22 |
Family
ID=7848437
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98121035A Expired - Lifetime EP0916436B1 (de) | 1997-11-12 | 1998-11-05 | Monolithischer, feuerfester, keramischer Lochstein |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0916436B1 (de) |
AT (1) | ATE252431T1 (de) |
DE (2) | DE19750039C1 (de) |
ES (1) | ES2209037T3 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005061291B4 (de) * | 2005-12-20 | 2008-01-03 | Heraeus Electro-Nite International N.V. | Keramischer Lochstein und metallurgisches Gefäß |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1451548A (en) * | 1974-03-29 | 1976-10-06 | Zirconal Processes Ltd | Discharge of metal from casting ladles |
IT1172313B (it) * | 1983-07-27 | 1987-06-18 | Centro Speriment Metallurg | Perfezionamento negli scaricatori per il colaggio di acciai calmati all'alluminio |
JPS62158562A (ja) * | 1986-01-06 | 1987-07-14 | Harima Refract Co Ltd | 溶鋼低温鋳造用ノズル |
EP0352353B1 (de) * | 1988-07-28 | 1991-05-08 | INTRACON Handelsgesellschaft für Industriebedarf mbH | Pfannenlochstein für die Verschlussvorrichtung einer Giesspfanne |
-
1997
- 1997-11-12 DE DE19750039A patent/DE19750039C1/de not_active Expired - Fee Related
-
1998
- 1998-11-05 AT AT98121035T patent/ATE252431T1/de not_active IP Right Cessation
- 1998-11-05 DE DE59809963T patent/DE59809963D1/de not_active Expired - Fee Related
- 1998-11-05 EP EP98121035A patent/EP0916436B1/de not_active Expired - Lifetime
- 1998-11-05 ES ES98121035T patent/ES2209037T3/es not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE59809963D1 (de) | 2003-11-27 |
ATE252431T1 (de) | 2003-11-15 |
DE19750039C1 (de) | 1998-09-03 |
EP0916436A1 (de) | 1999-05-19 |
ES2209037T3 (es) | 2004-06-16 |
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