EP0755741B1 - Verfahren und Vorrichtung zum induktiven Aufheizen eines feuerfesten Formteils - Google Patents
Verfahren und Vorrichtung zum induktiven Aufheizen eines feuerfesten Formteils Download PDFInfo
- 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
Links
Images
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)
Description
Claims (13)
- Verfahren zum induktiven Aufheizen eines feuerfesten Formteils, das einen rohrförmigen Innenraum aufweist, und wobei in den Innenraum (2) ein Inneninduktor (4) eingebracht wird, dadurch gekennzeichnet dass zwischen dem Inneninduktor (4) und dem Formteil (1) eine elektrisch und thermisch isolierende Schicht (13) und/oder mindestens ein elektrisch und thermisch isolierender Rohrabschnitt (7) vorgesehen wird, dass mittels des Inneninduktors (4) das Formteil (1) aufgeheizt wird und danach der Inneninduktor (4) aus dem Innenraum (2) herausgenommen wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das Formteil (1) ein feuersfestes Tauchgießrohr ist.
- Verfahren nach Anspruch 2, dadurch gekennzeichnet, dass als Inneninduktor (4) eine gekühlte, vorwiegend wendelförmige Induktionsspule (5) verwendet wird.
- Verfahren nach Anspruch 2 oder 3, dadurch gekennzeichnet, dass die Abmessungen der Induktionsspule (5) den Abmessungen des Innenraums (2) des feuerfesten Formteils (1) angepasst wird.
- Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass der Abstand der Induktionsspule (5) von den Oberflächen der aufzuheizenden Bereiche des feuerfesten Formteils (1) so eingestellt wird, dass unterschiedliche Energiemengen übertragen werden.
- Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Induktionsspule (5) in dem Innenraum (2) des Formteils (1) zentriert wird.
- Verfahren nach Anspruch 6, dadurch gekennzeichnet, dass zur Zentrierung der mindestens eine Rohrabschnitt (7) dient, welcher die Induktionsspule (5) umfasst und innerhalb des Innenraums (2) des Formteils (1) zentrisch ausrichtet.
- Verfahren nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass der mindestens eine Rohrabschnitt (7) auf die Induktionsspule (5) aufgeschoben wird.
- Verfahren nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass der mindestens eine Rohrabschnitt (7) an der Induktionsspule (5) auswechselbar ist.
- Verfahren nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass der mindestens eine Rohrabschnitt (7) aus einem hochhitzebeständigen, keramischen Fasermaterial oder keramischen Schaummaterial besteht.
- Verfahren nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass der mindestens eine Rohrabschnitt (7) als zumindest teilweise Auskleidung des Innenraums (2) angeordnet wird.
- Verfahren nach Anspruch 11, dadurch gekennzeichnet, dass die Auskleidung nach dem Aufheizen zersetzt wird.
- Verfahren nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, dass das Formteil (1) mit einer Außenisolierung (12), vorzugsweise aus keramischem Fasermaterial oder keramischem Schaummaterial, versehen wird.
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 (de) |
JP (1) | JPH09122901A (de) |
KR (1) | KR970005459A (de) |
CN (1) | CN1146939A (de) |
AT (1) | ATE209075T1 (de) |
AU (1) | AU724697B2 (de) |
DE (2) | DE19526970C2 (de) |
ZA (1) | ZA966008B (de) |
Families Citing this family (12)
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)
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 |
-
1995
- 1995-07-25 DE DE19526970A patent/DE19526970C2/de not_active Expired - Fee Related
-
1996
- 1996-07-05 EP EP96110900A patent/EP0755741B1/de not_active Expired - Lifetime
- 1996-07-05 AT AT96110900T patent/ATE209075T1/de not_active IP Right Cessation
- 1996-07-05 DE DE59608239T patent/DE59608239D1/de not_active Expired - Fee Related
- 1996-07-09 JP JP8211824A patent/JPH09122901A/ja active Pending
- 1996-07-15 ZA ZA966008A patent/ZA966008B/xx unknown
- 1996-07-15 KR KR1019960028515A patent/KR970005459A/ko not_active Application Discontinuation
- 1996-07-22 CN CN96109933A patent/CN1146939A/zh active Pending
- 1996-07-23 AU AU60649/96A patent/AU724697B2/en not_active Ceased
Also Published As
Publication number | Publication date |
---|---|
CN1146939A (zh) | 1997-04-09 |
ZA966008B (en) | 1997-01-31 |
AU6064996A (en) | 1997-01-30 |
DE59608239D1 (de) | 2002-01-03 |
JPH09122901A (ja) | 1997-05-13 |
KR970005459A (ko) | 1997-02-19 |
AU724697B2 (en) | 2000-09-28 |
DE19526970C2 (de) | 2000-11-16 |
DE19526970A1 (de) | 1997-01-30 |
ATE209075T1 (de) | 2001-12-15 |
EP0755741A1 (de) | 1997-01-29 |
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