EP0755741B1 - Verfahren und Vorrichtung zum induktiven Aufheizen eines feuerfesten Formteils - Google Patents

Verfahren und Vorrichtung zum induktiven Aufheizen eines feuerfesten Formteils Download PDF

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Publication number
EP0755741B1
EP0755741B1 EP96110900A EP96110900A EP0755741B1 EP 0755741 B1 EP0755741 B1 EP 0755741B1 EP 96110900 A EP96110900 A EP 96110900A EP 96110900 A EP96110900 A EP 96110900A EP 0755741 B1 EP0755741 B1 EP 0755741B1
Authority
EP
European Patent Office
Prior art keywords
interior
induction coil
article
heating
tube section
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
EP96110900A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0755741A1 (de
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 EP0755741A1 publication Critical patent/EP0755741A1/de
Application granted granted Critical
Publication of EP0755741B1 publication Critical patent/EP0755741B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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
    • B22D41/005—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
    • 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 method for inductive heating of a refractory molded part that has a tubular interior has, in particular a dip tube.
  • Such molded parts are in particular part of a melt outlet device in a metallurgical vessel. you will be preheated to an undesirable cooling of the flowing Avoid melt, especially freezing.
  • Fireproof spout moldings are common, especially Immersion spouts, heated by gas burners. This has the disadvantage that it burns out the Carbon comes, which is the material component of the molded part. It is also unfavorable that it heats up when it heats up uneven temperature distribution in the molded part comes. There were, for example, temperature differences of about 400 K. detected. In addition, the heating takes one considerable time.
  • DE 38 42 690 A1 is a refractory spout for one Continuous caster shown, the pouring channel outside of one Induction coil is surrounded with the inner outer wall is controlled inductively heated.
  • the coil is a component of the pouring component. This is complex and expensive, which is particularly important because such refractories Pour molded parts are wearing parts.
  • EP 0 487 924 A3 describes a process for the production of ceramic molded and / or profile bodies for the high temperature range, especially in the case of metallurgical continuous casting plants known in which a ceramic mixture molded and subjected to thermal treatment.
  • a ceramic mixture molded and subjected to thermal treatment Around the for the thermal treatment and heating of the Molded and / or profiled body required total effort at the site to reduce the thermal treatment at least partly on site using a heating device carried out by means of the preheating on site the molded and / or profile body is made.
  • a heating device carried out by means of the preheating on site.
  • the molded and / or profile body is made.
  • the thermal treatment and heating can there also by means of a, in particular electrical, heating element the heating device by heat radiation and / or Conduction takes place, the heating element taking the form and / or engages around profile body and / or is inserted into it.
  • US-PS 3 435 992 is a molded and / or profile body as a spout for a spout of a metallurgical vessel known. Then the spout is heated up at the place of use, for which an electric heating is provided.
  • the spout is electrically conductive can cause heating done inductively by means of an induction coil. It can also capacitive or dielectric heating of the spout be provided. There is also resistance heating possible.
  • the object of the invention is a fast, safe and even heating of the refractory molded part possible.
  • this object is in a method of type mentioned at the outset with the features of claim 1 solved.
  • An outer metal jacket of the molding affects heating up not. Because of the electrical and thermal insulation of the induction coil from the Molded parts are not only electrical short circuits but overheating of the internal inductor also avoided. Through the Invention, increased plant availability is achieved because Freezing problems can be avoided. The procedure is suitable not only for heating while pouring, but also for Heating in the event of interruptions in the casting process around the molded part maintain a suitable temperature.
  • an internal inductor When performing the process is called an internal inductor preferably a cooled, predominantly helical induction coil used.
  • the figure shows an immersion nozzle for a metallurgical Vessel with an internal inductor used according to the invention.
  • An immersion nozzle known per se in its form is a fire-resistant molded part 1 made of a ceramic, carbonaceous material that is inductive to one alternating electric field resulting in heating can be coupled.
  • the immersion spout has a tubular, cylindrical interior 2.
  • the immersion nozzle is in an outer section with a metallic outer jacket 3 provided.
  • the metallic outer jacket 3 shields electromagnetic Fields opposite the immersion spout, so that the immersion spout with an external induction coil is not would be evenly heated.
  • the tubular, cylindrical interior 2 an inner inductor 4 inserted.
  • the inner inductor 4 has a cooled, helical Induction coil 5, which is connected to a generator 6 is.
  • the induction coil 5 is in their Dimensions, in particular the length of the interior 2 adjusted so that they are as possible over the entire length of the Interior 2 extends. In addition, their diameter is on the Adjusted the diameter of the interior 2.
  • the surface of the interior 2 is opposite the induction coil 5 with a layer 13, for example a ceramic glaze, electrically and thermally insulated so that the immersion spout not in contact with live parts comes and / or there is no zonal overheating.
  • a layer 13 for example a ceramic glaze, electrically and thermally insulated so that the immersion spout not in contact with live parts comes and / or there is no zonal overheating.
  • the outer surface of the induction coil 5 is by means of a Pipe section 7 opposite the surface of the interior 2 electrically and thermally insulated.
  • the induction coil 5 different Adapt geometries or wall thicknesses in such a way that different distances between the induction coil 5 and the Surfaces of the areas to be heated exist.
  • This Measure different energy densities in the measure Molding 1 produces what the uniformity of heating different wall thicknesses improved.
  • the pipe section 7 is to be designed accordingly.
  • the pipe section 7 also serves to center the induction coil 5 in the interior 2.
  • the pipe section 7 is on the Induction coil 5 frictionally pushed on, so that it is in Is exchangeable if necessary.
  • the outside diameter of the Pipe section 7 is so on the inside diameter of the interior 2 adapted that he easily with the induction coil 5 in the Interior 2 can be pushed in and pulled out of interior 2 is.
  • the design can also be such that first the pipe section 7 into the interior 2 and then the Induction coil 5 is inserted into the tube section 7.
  • the pipe section 7 has at the top to limit insertion a flange 8. In the embodiment, it is below closed by a bottom 9.
  • the immersion spout also in its extended head area 10 to heat, the induction coil 5 is above Flange 8 provided with an additional turn 11.
  • the pipe section 7 consists of a highly heat-resistant, ceramic fiber or foam material.
  • the pipe section 7 or the pipe sections do not have to the interior 2 can be pulled out. It is also possible that Pipe section 7 or the pipe sections as the lining of the To design interior 2, which then at the first Use by the melt is decomposed.
  • the Inner inductor 4 with its tube section 7 in the interior 2 inserted and the generator 6 is switched on. Thereby the immersion spout is essentially over its entire length Length quickly and evenly inductively heated.
  • the internal inductor 4 is reached from the Immersion spout pulled out. This is then preheated ready for casting.
  • the inner inductor 4 can be used for use many heating processes on many immersion spouts. Its possible use is therefore due to the wear of the Immersion spout independent.
  • the pipe section 7 can be if it is worn, pull it off the induction coil 5 and replace with a new pipe section. With different Inner diameters of immersion spouts Pipe sections 7 with correspondingly different outside diameters be kept ready. It is possible the induction coil 5 even with different interior diameters insert each coaxially centered.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Induction Heating (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Heat Treatment Of Articles (AREA)
  • Furnace Details (AREA)
  • Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
  • Forging (AREA)
EP96110900A 1995-07-25 1996-07-05 Verfahren und Vorrichtung zum induktiven Aufheizen eines feuerfesten Formteils Expired - Lifetime EP0755741B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19526970 1995-07-25
DE19526970A DE19526970C2 (de) 1995-07-25 1995-07-25 Verfahren zum induktiven Aufheizen eines feuerfesten Formteils

Publications (2)

Publication Number Publication Date
EP0755741A1 EP0755741A1 (de) 1997-01-29
EP0755741B1 true EP0755741B1 (de) 2001-11-21

Family

ID=7767630

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96110900A Expired - Lifetime EP0755741B1 (de) 1995-07-25 1996-07-05 Verfahren und Vorrichtung zum induktiven Aufheizen eines feuerfesten Formteils

Country Status (8)

Country Link
EP (1) EP0755741B1 (ko)
JP (1) JPH09122901A (ko)
KR (1) KR970005459A (ko)
CN (1) CN1146939A (ko)
AT (1) ATE209075T1 (ko)
AU (1) AU724697B2 (ko)
DE (2) DE19526970C2 (ko)
ZA (1) ZA966008B (ko)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19900915A1 (de) 1999-01-13 2000-07-20 Schloemann Siemag Ag Verfahren und Vorrichtung zum Einstellen und/oder Halten der Temperatur einer Schmelze, bevorzugt einer Stahlschmelze beim Stranggießen
KR100681115B1 (ko) * 1999-11-24 2007-02-08 주식회사 케이티 통신시스템에서의 그래픽 화면 처리 속도 향상 방법
DE10035097A1 (de) * 2000-07-17 2002-02-07 Didier Werke Ag Heizvorrichtung mit Inneninduktor
DE10204305B4 (de) * 2002-02-01 2004-04-29 Heraeus Electro-Nite International N.V. Feuerfester Ausguss für ein metallurgisches Gefäß
JP4660343B2 (ja) * 2004-11-24 2011-03-30 新日本製鐵株式会社 溶融金属の注入用ノズルの加熱装置
JP4482549B2 (ja) * 2006-11-28 2010-06-16 新日本製鐵株式会社 誘導加熱装置
KR101412539B1 (ko) * 2012-05-31 2014-07-01 현대제철 주식회사 몰드 예열기
CN106077598A (zh) * 2016-04-26 2016-11-09 重庆大学 一种铝合金熔体保温浇注室的熔池温度调节装置
CN107520437A (zh) * 2016-06-21 2017-12-29 宝山钢铁股份有限公司 一种钢包长水口低过热度的温度补偿装置及其方法
JP7222262B2 (ja) * 2019-02-13 2023-02-15 日本製鉄株式会社 誘導加熱コイル用保護耐火物および電磁誘導加熱方法
JP7234768B2 (ja) * 2019-04-16 2023-03-08 日本製鉄株式会社 浸漬ノズルの予熱方法
JP2020179412A (ja) * 2019-04-25 2020-11-05 日本製鉄株式会社 浸漬ノズル用誘導加熱装置および浸漬ノズルの予熱方法

Family Cites Families (6)

* 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
DE3842690C2 (de) * 1988-12-19 1998-04-30 Didier Werke Ag Feuerfeste Verbindung sowie Induktionsspule hierfür
DE4038061A1 (de) * 1990-11-29 1992-06-04 Didier Werke Ag Verfahren zur herstellung von keramischen form- und /oder profilkoerpern
US5523546A (en) * 1995-05-09 1996-06-04 Mannings, U.S.A., Inc. Apparatus and method of inductively heating a workpiece with a slender bone

Also Published As

Publication number Publication date
ATE209075T1 (de) 2001-12-15
EP0755741A1 (de) 1997-01-29
AU6064996A (en) 1997-01-30
KR970005459A (ko) 1997-02-19
DE59608239D1 (de) 2002-01-03
ZA966008B (en) 1997-01-31
CN1146939A (zh) 1997-04-09
AU724697B2 (en) 2000-09-28
JPH09122901A (ja) 1997-05-13
DE19526970A1 (de) 1997-01-30
DE19526970C2 (de) 2000-11-16

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