EP0755740B1 - Procédé et dispositif de chauffage par induction d'une pièce réfractaire - Google Patents

Procédé et dispositif de chauffage par induction d'une pièce réfractaire Download PDF

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Publication number
EP0755740B1
EP0755740B1 EP96110899A EP96110899A EP0755740B1 EP 0755740 B1 EP0755740 B1 EP 0755740B1 EP 96110899 A EP96110899 A EP 96110899A EP 96110899 A EP96110899 A EP 96110899A EP 0755740 B1 EP0755740 B1 EP 0755740B1
Authority
EP
European Patent Office
Prior art keywords
interior
article
inductor
insulation
refractory
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
EP96110899A
Other languages
German (de)
English (en)
Other versions
EP0755740A1 (fr
Inventor
Raimund Brückner
Rüdiger Dr. Grau
Daniel Grimm
Steve Lee
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.)
Didier Werke AG
Original Assignee
Didier Werke AG
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 Didier Werke AG filed Critical Didier Werke AG
Publication of EP0755740A1 publication Critical patent/EP0755740A1/fr
Application granted granted Critical
Publication of EP0755740B1 publication Critical patent/EP0755740B1/fr
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
    • B22D41/005—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like with heating or cooling means
    • B22D41/01—Heating means
    • B22D41/015—Heating means with external heating, i.e. the heat source not being a part of the ladle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/10—Supplying or treating molten metal
    • 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
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/36—Coil arrangements
    • H05B6/38—Coil arrangements specially adapted for fitting into hollow spaces of workpieces

Definitions

  • the invention relates to a method for inductive heating a refractory molded part according to the preamble of the claim 1.
  • Such molded parts are in particular part of a melt outlet device or melt feed device at one metallurgical vessel. They are preheated to an unwanted one Cooling the flowing melt, in particular to avoid their freezing.
  • DE-A-3 842 690 describes a refractory spout for one Continuous caster known, the pouring channel outside of one Induction coil is surrounded, with which the inner outer wall is controlled inductively heated. Since the coil is part of the Pouring component, it is a complex and expensive solution because such refractory pouring moldings Are wearing parts.
  • Fireproof molded parts are usually used Gas burners heated up. This has the disadvantage of being there carbon can burn out Material component of the molding is. It is unfavorable also that when it heats up to an uneven Temperature distribution in the molded part comes. For example, Differences in temperature of about 400 K were observed. About that in addition, the heating up takes a considerable amount of time Claim.
  • a method of the type mentioned is from EP-A-0 487 924 known.
  • a heating device is used the completion of the manufacture of an immersion nozzle thermal treatment.
  • the heating device can also be used to heat the immersion nozzle so that this is preheated to a desired temperature in a Chill mold can be used.
  • From US-A-2 806 117 is an inductor for the heat treatment known metallic workpieces, whose magnetic coil arranged in the interior of the circular cylindrical workpiece can be. Again, only the inner surface areas of the tubular workpiece is heated.
  • the object of the invention is to provide a quick and uniform To allow the refractory molded part to be recorded.
  • this object is in a method of initially mentioned type with the measures of claim 1 solved.
  • the invention increases plant availability achieved because cracking and freezing problems are avoided.
  • the process is not only suitable for heating up Casting on, but also for heating up in the event of interruptions in casting, to keep the molding at an appropriate temperature.
  • a special embodiment of the method is characterized by this that an inner inductor is used, which consists of a or a plurality of cooled induction coils is formed.
  • the figure shows a fireproof molded part as a feed channel for a twin roll caster with an inserted internal inductor.
  • a feed channel known in its form is a Refractory molded part (1) made of a ceramic, carbon-containing Material that is inductive to an alternating electrical field can be coupled with the consequence of heating.
  • the Feed channel has a channel-shaped interior (2) rectangular cross section.
  • the feed channel is in one outer part with a metallic outer jacket (3) provided, as is often the case when using so-called ETA changers used.
  • the metallic outer jacket (3) shields electromagnetic fields from the supply channel, so the feed channel with an outer induction coil would not be heated evenly.
  • the inner inductor (4) is in its Dimensions, in particular the length of the interior (2) adjusted so that it extends over the entire length if possible of the interior (2) extends. In addition, its outer geometry adapted to the dimensions of the interior (2).
  • the inner inductor (4) has a number of cooled induction coils (5) a generator (6) are connected.
  • the interior (2) is opposite Internal inductor (4) with a layer (12), for example a ceramic glaze, electrically and / or thermally insulated so that the refractory molded part (1) does not electrical parts come into contact and / or no zonal Overheating occurs.
  • the outer surface of the Internal inductor (4) by means of an insulation molding (7) against the surfaces of the interior (2) electrically and / or thermally insulated.
  • the internal inductor (4) has different geometries or Adjust wall thicknesses in such a way that different distances between the Internal inductor (4) and the surfaces of the areas to be heated exist. With This measure produces different energy densities in the molded part (1), what the uniformity of heating with different wall thicknesses improved.
  • the molded insulation part (7) is to be designed accordingly.
  • the molded insulation part (7) also serves to center the inner inductor (4) in the Interior (2).
  • the molded insulation part (7) is on the induction coil (5) slid in place so that it can be replaced if necessary.
  • the outer geometry of the molded insulation part (7) is adapted to the interior (2), that it can be easily inserted and removed with the inner inductor (4) into the interior (2) the interior (2) can be pulled out.
  • the design can also be so be taken that first the molded insulation part (7) in the interior (2) and then the inner inductor (4) is to be inserted into the molded insulation part (7).
  • the molded insulation part (7) has a top to limit insertion Flange (8). It's open below. In other applications, e.g. at The insulation molding (7) can be provided with supply channels with lateral outflow openings. be closed by means of a base.
  • the molded insulation part (7) consists of a highly heat-resistant, ceramic Fiber material or ceramic foam material.
  • the molded insulation part (7) or the molded insulation parts do not have to be removed from the Interior (2) can be pulled out. It is also possible to isolate the molded part (7) or to design the molded insulation parts as the lining of the interior (2).
  • the supply duct can, preferably with an external insulation (11) ceramic fiber material or ceramic foam material. This improves the rapid and even heating of the feed channel.
  • the inner inductor (4) is connected to the Insulation molded part (7) inserted into the interior (2) and the generator (6) is switched on.
  • the feed channel is essentially above its entire cross section heated quickly and evenly inductively.
  • the target temperature is the internal inductor (4) from the supply channel pulled out. This is then pre-heated and ready for the casting operation.
  • the Internal inductor (4) can be used for many heating processes on many supply channels use. Its use is therefore due to the wear of the feed channel independently.
  • the molded insulation part (7) can, if it is worn, by the Pull off the inner inductor (4) and replace it with a new molded insulation part. at different cross-sections of supply channels can be used to form insulation parts (7) with different dimensions. It is This makes it possible to use the inner inductor (4) even with different Insert interior geometries centered.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Induction Heating (AREA)
  • Heat Treatment Of Articles (AREA)
  • Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
  • Forging (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)

Claims (15)

  1. Procédé de chauffage par induction d'une pièce réfractaire (1) en matériau céramique à l'aide d'un inducteur, caractérisé en ce qu'on utilise une pièce réfractaire (1) qui présente un espace intérieur (2) en forme de canal avec une section transversale rectangulaire, en ce qu'on utilise un inducteur dont les dimensions et la géométrie extérieure sont adaptées aux dimensions de l'espace intérieur (2), en ce que l'inducteur est introduit comme l'inducteur intérieur (4) dans l'espace intérieur (2), en ce que l'inducteur intérieur (4) est isolé par rapport à la surface de l'espace intérieur (2), en ce que la pièce (1) est chauffée sur toute sa section transversale au moyen de l'inducteur intérieur (4) et en ce qu'après cela l'inducteur intérieur (4) est sorti de l'espace intérieur (2).
  2. Procédé selon la revendication 1, caractérisé en ce que l'on utilise comme pièce (1) un canal d'approvisionnement en métal liquide, en particulier de l'acier, réfractaire.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que la pièce (1) présente un manteau extérieur métallique (3) au moins dans une partie.
  4. Procédé selon l'une des revendications 1 à 3, caractérisé en ce qu'on utilise un inducteur intérieur (4) formé d'une ou plusieurs bobines d'induction refroidies (5).
  5. Procédé selon l'une des revendications 1 à 4, caractérisé en ce qu'il est prévu une pièce d'isolation (7) thermiquement et / ou électriquement isolante ou une couche (12) thermiquement et / ou électriquement isolante comme isolation entre l'inducteur intérieur (4) et la surface de l'espace intérieur (2).
  6. Procédé selon l'une des revendications précédentes, caractérisé en ce que la distance entre l'inducteur intérieur (4) et les surfaces des zones à chauffer de la pièce réfractaire (1) est réglée de telle sorte que différentes quantités d'énergie peuvent être transmises.
  7. Procédé selon l'une des revendications précédentes, caractérisé en ce que l'inducteur intérieur (4) est centré dans l'espace intérieur (2) de la pièce (1).
  8. Procédé selon l'une des revendications 6 ou 7, caractérisé en ce que le centrage / les distances est / sont imposé(es) par la pièce d'isolation (7).
  9. Procédé selon l'une des revendications 5 à 8, caractérisé en ce que l'on utilise une pièce d'isolation (7) en matériau fibreux céramique hautement réfractaire ou en matériau cellulaire céramique.
  10. Procédé selon l'une des revendications 5 à 9, caractérisé en ce que la pièce d'isolation (7) est enfilée sur l'inducteur intérieur (4).
  11. Procédé selon l'une des revendications 5 à 10, caractérisé en ce que l'on utilise une pièce d'isolation (7) échangeable sur l'inducteur intérieur (4).
  12. Procédé selon l'une des revendications 5 à 11, caractérisé en ce que la pièce d'isolation (7) et la pièce réfractaire (1) ou l'inducteur intérieur (4) sont facilement séparés les uns des autres après le chauffage.
  13. Procédé selon l'une des revendications 5 à 11, caractérisé en ce que la pièce d'isolation (7) est disposée dans l'espace intérieur (2) de la pièce (1) au moins comme revêtement partiel de celle-ci.
  14. Procédé selon l'une des revendications 5 à 13, caractérisé en ce que la pièce d'isolation (7) se désintègre après le chauffage.
  15. Procédé selon l'une des revendications 1 à 14, caractérisé en ce que l'on utilise une pièce (1) avec une isolation extérieure (11), de préférence en matériau fibreux céramique ou en matériau cellulaire céramique.
EP96110899A 1995-07-25 1996-07-05 Procédé et dispositif de chauffage par induction d'une pièce réfractaire Expired - Lifetime EP0755740B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19526967A DE19526967A1 (de) 1995-07-25 1995-07-25 Verfahren und Vorrichtung zum induktiven Aufheizen eines feuerfesten Formteils
DE19526967 1995-07-25

Publications (2)

Publication Number Publication Date
EP0755740A1 EP0755740A1 (fr) 1997-01-29
EP0755740B1 true EP0755740B1 (fr) 2002-02-27

Family

ID=7767627

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96110899A Expired - Lifetime EP0755740B1 (fr) 1995-07-25 1996-07-05 Procédé et dispositif de chauffage par induction d'une pièce réfractaire

Country Status (8)

Country Link
EP (1) EP0755740B1 (fr)
JP (1) JPH09122902A (fr)
KR (1) KR970005458A (fr)
CN (1) CN1146938A (fr)
AT (1) ATE213678T1 (fr)
AU (1) AU725323B2 (fr)
DE (2) DE19526967A1 (fr)
ZA (1) ZA966009B (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10059744A1 (de) * 2000-12-01 2002-06-06 Km Europa Metal Ag Verfahren zum gezielten Temperieren einer Gießrinne und Gießrinne zur Durchführung des Verfahrens
CN104962699A (zh) * 2015-07-20 2015-10-07 柳州市建西机械铸造厂 工件热处理装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1607264A (en) * 1922-02-02 1926-11-16 Budd Wheel Co Method of and means for heating disks or plates electrically
US2227866A (en) * 1938-06-29 1941-01-07 Howard E Somes Protected and insulated heat treatment coil
US2806117A (en) * 1953-12-07 1957-09-10 Westinghouse Electric Corp Inductor apparatus
DE4038061A1 (de) * 1990-11-29 1992-06-04 Didier Werke Ag Verfahren zur herstellung von keramischen form- und /oder profilkoerpern

Also Published As

Publication number Publication date
AU725323B2 (en) 2000-10-12
ATE213678T1 (de) 2002-03-15
DE59608780D1 (de) 2002-04-04
EP0755740A1 (fr) 1997-01-29
ZA966009B (en) 1997-01-31
DE19526967A1 (de) 1997-02-13
CN1146938A (zh) 1997-04-09
KR970005458A (ko) 1997-02-19
AU6065096A (en) 1997-01-30
JPH09122902A (ja) 1997-05-13

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