EP1275453A2 - Feuerfester Ausguss - Google Patents
Feuerfester Ausguss Download PDFInfo
- Publication number
- EP1275453A2 EP1275453A2 EP02009195A EP02009195A EP1275453A2 EP 1275453 A2 EP1275453 A2 EP 1275453A2 EP 02009195 A EP02009195 A EP 02009195A EP 02009195 A EP02009195 A EP 02009195A EP 1275453 A2 EP1275453 A2 EP 1275453A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- refractory
- solid electrolyte
- spout according
- electrolyte material
- electrode
- 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.)
- Granted
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
- B22D41/50—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
- B22D41/50—Pouring-nozzles
- B22D41/60—Pouring-nozzles with heating or cooling means
Definitions
- the invention relates to a refractory spout for arrangement in the wall of metallurgical Vessels, in particular for steel melts with an upper and a lower end having passage opening, an inner wall laterally enclosing the passage opening made of a solid electrolyte material, with at least one facing away from the passage opening Outside of the solid electrolyte material and arranged electrically conductive with at least partially the outside of the solid electrolyte material and the electrode enclosing thermal insulation material.
- Such a spout is known, for example, from US 4,850,572.
- a electrochemical process prevents the material flowing through the spout attaches to the surface of the inner wall of the spout.
- JP 62104655 A a further refractory spout of a similar type is known, in which one Solid electrolyte layer forms the inner wall of the passage opening by an outer electrode made of graphite powder. This is followed by an insulating material.
- the invention has for its object to provide a refractory spout that the known Improved solutions and a high functional reliability of the spout.
- the object is achieved in that the at least one electrode essentially made of a metal with a melting point of at least 1400 ° C and / or at least one of its oxides is formed.
- Such electrodes have proven to be stable so that a refractory spout equipped with it has a high level of functional reliability with high stability and low price.
- the at least one electrode essentially made of steel, chromium and / or a chromium oxide is formed.
- a chrome layer is arranged on the solid electrolyte material between the inner wall made of solid electrolyte material and the electrode, which preferably has a thickness of approximately 50 ⁇ m.
- An oxide of the metal of the at least one electrode should have a conductivity of at least 10 -2 ⁇ -1 cm -1 at a temperature of 1400 ° C.
- the known copper electrodes are difficult to contact with conventional solid electrolyte material; the known graphite electrode material oxidizes easily to form carbon monoxide or carbon dioxide, which can lead to the spout being destroyed.
- Chromium can advantageously be mixed with zirconium dioxide.
- Electrode on the side facing away from the solid electrolyte material Electrode a metal insert, in particular a wire mesh is arranged. It is also advantageous that at least two electrodes are seen one behind the other in the direction of the passage opening are arranged or that the electrodes form the solid electrolyte ring, tube or spiral include. Another advantageous embodiment of the invention results from that between the ends of the passage opening and the at least one electrode electrically insulating material is arranged.
- the insulating material of the refractory spout is preferably made of at least one material from the group aluminum oxide, zirconium dioxide and mullite, especially zirconia mullite, preferably with about 37% by weight Zirconia and about 63% by weight mullite are formed.
- the insulating material is advantageously of a preferably sintered one Limited zirconia-mullite ring that surrounds the solid electrolyte material, the Zirconia-mullite ring can be arranged at the upper end of the passage opening and where a cement is arranged between the zirconia mullite ring and the solid electrolyte material can be.
- the cement can be formed, for example, on the basis of aluminum oxide.
- the cement has a higher absolute thermal expansion than the zirconia-mullite ring and / or the solid electrolyte material to apply a voltage towards when heated Let the center of the spout arise and thus increase the strength of the device. In this case, the cement acts similarly to a tension ring, which strengthens the device elevated.
- the outside of the solid electrolyte material of the inner wall is at least partially surrounded by a heater, preferably a resistance heater, which preferably surrounds the electrodes.
- the heater enables the spout to be preheated to avoid tension and material damage due to sudden temperature changes.
- the heater is advantageously arranged in a ring, tube or spiral shape around the outside of the solid electrolyte material, preferably inside the thermally insulating material.
- the heater can be formed from carbon or graphite, from a high-melting metal, in particular from molybdenum, from a carbide, in particular from silicon carbide or an oxide, in particular from a chromium oxide, such as chromium dioxide, or a mixture or an alloy of at least two of these materials.
- Zirconium dioxide is preferably used as the solid electrolyte material of the inner wall. This advantageously has a density greater than 5.2 g / cm 3 and a silicon dioxide content less than 1.5% by weight and is preferably sintered.
- the spout has a passage opening 1, the inner wall 2 of which is formed from zirconium dioxide is.
- the diameter of the through opening 1 increases toward the upper opening Flow opening 1 continuously.
- the electrodes 3; 4 can also be made of steel, the material of the chrome layer 3 '; 4 'can with zirconia be mixed.
- connection electrodes 5 are led to the outside from the electrodes 3; 4.
- the Electrodes 3, 4 are made of an electrically insulating material 6, namely zirconium dioxide mullite surrounded, in which a heater 7 is embedded.
- the spout is on its outer circumference of surrounded a steel shell 8. This is formed from an upper part 8 a and a lower part 8 b.
- a ring 9 made of zirconia mullite forms the outer end of the spout.
- a cement 10 based on aluminum oxide is arranged between the zirconia mullite ring 9 and the inner wall made of zirconia.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Furnace Charging Or Discharging (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Measuring Oxygen Concentration In Cells (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
- Ceramic Products (AREA)
- Glass Compositions (AREA)
Abstract
Description
Claims (19)
- Feuerfester Ausguss zur Anordnung in der Wandung von metallurgischen Gefäßen, insbesondere für Stahlschmelzen, mit einer ein oberes und ein unteres Ende aufweisenden Durchlauföffnung, einer die Durchlauföffnung seitlich umschließenden Innenwand aus einem Festelektrolytmaterial, mit wenigstens einer an der der Durchlauföffnung abgewandten Außenseite des Festelektrolytmaterials elektrisch leitend angeordneten Elektrode, an welcher Anschlussleitungen angeordnet sind und mit einem die Außenseite des Festelektrolytmaterials und die Elektrode mindestens teilweise umschließenden thermischen Isoliermaterial, dadurch gekennzeichnet, dass die mindestens eine Elektrode (3;4) im wesentlichen aus einem Metall, das einen Schmelzpunkt von mindestens 1400°C aufweist und/oder aus mindestens einem seiner Oxide gebildet ist.
- Feuerfester Ausguss nach Anspruch 1, dadurch gekennzeichnet, dass die mindestens eine Elektrode (3;4) im wesentlichen aus Stahl, Chrom und/oder einem Chromoxid gebildet ist.
- Feuerfester Ausguss nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass zwischen Innenwand (2) aus Festelektrolytmaterial und Elektrode (3;4) zumindest teilweise eine Chromschicht (3';4') auf dem Festelektrolytmaterial angeordnet ist, die vorzugsweise eine Dicke von etwa 50 µm aufweist.
- Feuerfester Ausguss nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass auf der dem Festelektrolytmaterial abgewandten Seite der Elektrode (3;4) eine Metalleinlage, vorzugsweise ein Drahtnetz angeordnet ist.
- Feuerfester Ausguss nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass mindestens zwei Elektroden (3;4) in Richtung der Durchlauföffnung (1) hintereinander angeordnet sind.
- Feuerfester Ausguss nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Elektroden (3;4) das Festelektrolytmaterial ring-, rohr- oder spiralförmig umfassen.
- Feuerfester Ausguss nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass zwischen den Enden der Durchlauföffnung (1) und der mindestens einen Elektrode (3;4) jeweils ein elektrisch isolierendes Material (6) angeordnet ist.
- Feuerfester Ausguss nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass das isolierende Material (6) aus mindestens einem Material aus der Gruppe Aluminiumoxid, Zirkondioxid und Mullit, insbesondere aus Zirkondioxid-Mullit mit vorzugsweise etwa 37 Gewichts-% Zirkondioxid und etwa 63 Gewichts-% Mullit gebildet ist.
- Feuerfester Ausguss nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass das isolierende Material (6) an seiner Oberseite von einem vorzugsweise gesinterten Zirkondioxid-Mullit-Ring (9) begrenzt ist, der das Festelektrolytmaterial umgibt.
- Feuerfester Ausguss nach Anspruch 9, dadurch gekennzeichnet, dass der Zirkondioxid-Mullit-Ring (9) am oberen Ende der Durchlauföffnung (1) angeordnet ist.
- Feuerfester Ausguss nach Anspruch 9 oder 10, dadurch gekennzeichnet, dass zwischen dem Zirkondioxid-Mullit-Ring (9) und dem Festelektrolytmaterial ein Zement (10) angeordnet ist.
- Feuerfester Ausguss nach Anspruch 11, dadurch gekennzeichnet, dass der Zement (10) vorzugsweise auf Basis von Aluminiumoxid gebildet ist.
- Feuerfester Ausguss nach Anspruch 11 oder 12, dadurch gekennzeichnet, dass der Zement (10) eine höhere absolute Wärmeausdehnung aufweist als der Zirkondioxid-Mullit-Ring (9) und/oder das Festelektrolytmaterial.
- Feuerfester Ausguss nach einem der Ansprüche 1 bis 13, dadurch gekennzeichnet, dass die Außenseite des Festelektrolytmaterials der Innenwand (2) zumindest teilweise von einem Heizer (7), vorzugsweise einer Widerstandsheizung umgeben ist, die vorzugsweise die Elektroden (3;4) umgibt.
- Feuerfester Ausguss nach Anspruch 14, dadurch gekennzeichnet, dass der Heizer (7) ring-, rohr- oder spiralförmig um die Außenseite des Festelektrolytmaterials herum angeordnet ist.
- Feuerfester Ausguss nach Anspruch 14 oder 15, dadurch gekennzeichnet, dass der Heizer (7) in dem thermisch isolierenden Material (6) angeordnet ist.
- Feuerfester Ausguss nach einem der Ansprüche 14 bis 16, dadurch gekennzeichnet, dass der Heizer (7) aus Kohlenstoff oder Graphit, aus einem hochschmelzenden Metall, insbesondere aus Molybdän, aus einem Karbid, insbesondere aus Siliziumkarbid oder einem Oxid, insbesondere aus Cr2O3 oder einer Mischung oder einer Legierung aus mindestens zwei dieser Materialien gebildet ist.
- Feuerfester Ausguss nach einem der Ansprüche 1 bis 17, dadurch gekennzeichnet, dass das Festelektrolytmaterial der Innenwand (2) aus Zirkondioxid gebildet ist.
- Feuerfester Ausguss nach Anspruch 18, dadurch gekennzeichnet, dass das Feuerfestmaterial der Innenwand (2) eine Dichte größer 5,2 g/cm3 und einen Gehalt an Siliziumdioxid kleiner 1,5 Gew.-% aufweist und vorzugsweise gesintert ist.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10132575 | 2001-07-10 | ||
| DE10132575A DE10132575C1 (de) | 2001-07-10 | 2001-07-10 | Feuerfester Ausguss |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1275453A2 true EP1275453A2 (de) | 2003-01-15 |
| EP1275453A3 EP1275453A3 (de) | 2003-11-26 |
| EP1275453B1 EP1275453B1 (de) | 2004-12-01 |
Family
ID=7690691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02009195A Expired - Lifetime EP1275453B1 (de) | 2001-07-10 | 2002-04-25 | Feuerfester Ausguss |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US6772921B2 (de) |
| EP (1) | EP1275453B1 (de) |
| JP (1) | JP3766645B2 (de) |
| KR (1) | KR100596086B1 (de) |
| CN (1) | CN1202930C (de) |
| AT (1) | ATE283747T1 (de) |
| BR (1) | BR0202571B1 (de) |
| CA (2) | CA2651258C (de) |
| DE (2) | DE10132575C1 (de) |
| ES (1) | ES2229007T3 (de) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1275452A3 (de) * | 2001-07-13 | 2003-12-10 | Heraeus Electro-Nite International N.V. | Feuerfester Ausguss |
| DE10201355A1 (de) * | 2002-01-16 | 2003-07-31 | C G Aneziris | Unterstützte chemische und thermomechanische Eigenschaften von feuerfesten Schlüsselbauteilen und Auskleidungen unter Stromzuführung und/oder mit elektrischen und/oder elektrochemischen und/oder elektromagnetischen Wirkungsmechanismen |
| DE10204305B4 (de) * | 2002-02-01 | 2004-04-29 | Heraeus Electro-Nite International N.V. | Feuerfester Ausguss für ein metallurgisches Gefäß |
| KR101089252B1 (ko) * | 2004-03-16 | 2011-12-02 | 주식회사 포스코 | 턴디시 상부노즐용 몰탈 내화물 |
| JP4585606B2 (ja) | 2008-12-26 | 2010-11-24 | 新日本製鐵株式会社 | 連続鋳造方法及びノズル加熱装置 |
| KR101907930B1 (ko) * | 2016-10-17 | 2018-10-15 | 주식회사 포스코 | 노즐 및 이의 제조 방법 |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3722821A (en) * | 1971-06-03 | 1973-03-27 | Bell Telephone Labor Inc | Devices for processing molten metals |
| CH625728A5 (de) * | 1977-12-27 | 1981-10-15 | Concast Ag | |
| JPS6047034B2 (ja) * | 1980-10-29 | 1985-10-19 | 日本鋼管株式会社 | 溶融金属用鋳込ノズル |
| JPS5775263A (en) * | 1980-10-29 | 1982-05-11 | Nippon Kokan Kk <Nkk> | Charging nozzle for molten metal |
| JPS606735B2 (ja) * | 1980-10-29 | 1985-02-20 | 日本鋼管株式会社 | 溶融金属用鋳込ノズル |
| JPS5785659A (en) * | 1980-11-18 | 1982-05-28 | Kawasaki Steel Corp | Preventive method for deposition of alumina from molten steel flow and nozzle for molten steel |
| JPS5813449A (ja) * | 1981-07-13 | 1983-01-25 | Nippon Steel Corp | 通電加熱用浸漬ノズル |
| LU85858A1 (fr) * | 1985-04-19 | 1986-11-05 | Electro Nite | Procede destine a empecher des depots sur les parois de recipients metallurgiques et recipient metallurgique adapte a la mise en oeuvre de ce procede |
| JPH0775763B2 (ja) * | 1985-10-25 | 1995-08-16 | 住友化学工業株式会社 | 連続鋳造用ノズル |
| JPS6356349A (ja) * | 1986-08-27 | 1988-03-10 | Harima Refract Co Ltd | 通電発熱ノズル |
| JPH0819505B2 (ja) * | 1989-01-09 | 1996-02-28 | 大同特殊鋼株式会社 | 通電下における溶融ガラス中での耐侵食性に優れたガラス溶融炉用電極材料 |
| KR19980046400A (ko) * | 1996-12-12 | 1998-09-15 | 김종진 | 연속주조용 침지노즐의 막힘방지방법 |
-
2001
- 2001-07-10 DE DE10132575A patent/DE10132575C1/de not_active Expired - Fee Related
-
2002
- 2002-04-25 AT AT02009195T patent/ATE283747T1/de active
- 2002-04-25 DE DE50201658T patent/DE50201658D1/de not_active Expired - Lifetime
- 2002-04-25 EP EP02009195A patent/EP1275453B1/de not_active Expired - Lifetime
- 2002-04-25 ES ES02009195T patent/ES2229007T3/es not_active Expired - Lifetime
- 2002-04-30 CA CA2651258A patent/CA2651258C/en not_active Expired - Fee Related
- 2002-04-30 CA CA002384211A patent/CA2384211C/en not_active Expired - Fee Related
- 2002-06-12 CN CNB021230935A patent/CN1202930C/zh not_active Expired - Fee Related
- 2002-07-05 JP JP2002196954A patent/JP3766645B2/ja not_active Expired - Fee Related
- 2002-07-08 US US10/191,903 patent/US6772921B2/en not_active Expired - Fee Related
- 2002-07-09 BR BRPI0202571-0B1A patent/BR0202571B1/pt not_active IP Right Cessation
- 2002-07-09 KR KR1020020039680A patent/KR100596086B1/ko not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| ATE283747T1 (de) | 2004-12-15 |
| KR100596086B1 (ko) | 2006-07-05 |
| EP1275453A3 (de) | 2003-11-26 |
| KR20030007078A (ko) | 2003-01-23 |
| US6772921B2 (en) | 2004-08-10 |
| BR0202571A (pt) | 2003-04-29 |
| CN1202930C (zh) | 2005-05-25 |
| EP1275453B1 (de) | 2004-12-01 |
| BR0202571B1 (pt) | 2013-10-29 |
| CN1396024A (zh) | 2003-02-12 |
| CA2651258C (en) | 2010-08-03 |
| CA2384211A1 (en) | 2003-01-10 |
| JP3766645B2 (ja) | 2006-04-12 |
| DE50201658D1 (de) | 2005-01-05 |
| CA2651258A1 (en) | 2003-01-10 |
| CA2384211C (en) | 2010-01-12 |
| US20030011112A1 (en) | 2003-01-16 |
| ES2229007T3 (es) | 2005-04-16 |
| DE10132575C1 (de) | 2002-07-04 |
| JP2003053518A (ja) | 2003-02-26 |
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