EP1275453B1 - Feuerfester Ausguss - Google Patents

Feuerfester Ausguss Download PDF

Info

Publication number
EP1275453B1
EP1275453B1 EP02009195A EP02009195A EP1275453B1 EP 1275453 B1 EP1275453 B1 EP 1275453B1 EP 02009195 A EP02009195 A EP 02009195A EP 02009195 A EP02009195 A EP 02009195A EP 1275453 B1 EP1275453 B1 EP 1275453B1
Authority
EP
European Patent Office
Prior art keywords
nozzle according
solid electrolyte
refractory nozzle
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.)
Expired - Lifetime
Application number
EP02009195A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1275453A2 (de
EP1275453A3 (de
Inventor
Martin Kendall
Hilaire Vaes
Jos Swennen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Heraeus Electro Nite International NV
Original Assignee
Heraeus Electro Nite International NV
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Heraeus Electro Nite International NV filed Critical Heraeus Electro Nite International NV
Publication of EP1275453A2 publication Critical patent/EP1275453A2/de
Publication of EP1275453A3 publication Critical patent/EP1275453A3/de
Application granted granted Critical
Publication of EP1275453B1 publication Critical patent/EP1275453B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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 chromium layer which preferably has a thickness of approximately 50 ⁇ m, is arranged on the solid electrolyte material at least partially between the inner wall made of solid electrolyte material and the electrode.
  • 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)
  • Measuring Oxygen Concentration In Cells (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Glass Compositions (AREA)
  • Ceramic Products (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
EP02009195A 2001-07-10 2002-04-25 Feuerfester Ausguss Expired - Lifetime EP1275453B1 (de)

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 EP1275453A2 (de) 2003-01-15
EP1275453A3 EP1275453A3 (de) 2003-11-26
EP1275453B1 true 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 (pt)
EP (1) EP1275453B1 (pt)
JP (1) JP3766645B2 (pt)
KR (1) KR100596086B1 (pt)
CN (1) CN1202930C (pt)
AT (1) ATE283747T1 (pt)
BR (1) BR0202571B1 (pt)
CA (2) CA2651258C (pt)
DE (2) DE10132575C1 (pt)
ES (1) ES2229007T3 (pt)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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 (pt) * 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

Also Published As

Publication number Publication date
CA2651258C (en) 2010-08-03
JP2003053518A (ja) 2003-02-26
CN1202930C (zh) 2005-05-25
US6772921B2 (en) 2004-08-10
DE50201658D1 (de) 2005-01-05
CN1396024A (zh) 2003-02-12
ATE283747T1 (de) 2004-12-15
BR0202571B1 (pt) 2013-10-29
DE10132575C1 (de) 2002-07-04
BR0202571A (pt) 2003-04-29
KR100596086B1 (ko) 2006-07-05
ES2229007T3 (es) 2005-04-16
EP1275453A2 (de) 2003-01-15
CA2651258A1 (en) 2003-01-10
KR20030007078A (ko) 2003-01-23
EP1275453A3 (de) 2003-11-26
CA2384211C (en) 2010-01-12
JP3766645B2 (ja) 2006-04-12
CA2384211A1 (en) 2003-01-10
US20030011112A1 (en) 2003-01-16

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