EP0755740B1 - Verfahren und Vorrichtung zum induktiven Aufheizen eines feuerfesten Formteils - Google Patents
Verfahren und Vorrichtung zum induktiven Aufheizen eines feuerfesten Formteils Download PDFInfo
- 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
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
- B22D41/005—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)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
- Forging (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19526967 | 1995-07-25 | ||
DE19526967A DE19526967A1 (de) | 1995-07-25 | 1995-07-25 | Verfahren und Vorrichtung zum induktiven Aufheizen eines feuerfesten Formteils |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0755740A1 EP0755740A1 (de) | 1997-01-29 |
EP0755740B1 true EP0755740B1 (de) | 2002-02-27 |
Family
ID=7767627
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96110899A Expired - Lifetime EP0755740B1 (de) | 1995-07-25 | 1996-07-05 | Verfahren und Vorrichtung zum induktiven Aufheizen eines feuerfesten Formteils |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP0755740B1 (xx) |
JP (1) | JPH09122902A (xx) |
KR (1) | KR970005458A (xx) |
CN (1) | CN1146938A (xx) |
AT (1) | ATE213678T1 (xx) |
AU (1) | AU725323B2 (xx) |
DE (2) | DE19526967A1 (xx) |
ZA (1) | ZA966009B (xx) |
Families Citing this family (2)
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)
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 |
-
1995
- 1995-07-25 DE DE19526967A patent/DE19526967A1/de not_active Withdrawn
-
1996
- 1996-07-05 EP EP96110899A patent/EP0755740B1/de not_active Expired - Lifetime
- 1996-07-05 DE DE59608780T patent/DE59608780D1/de not_active Expired - Fee Related
- 1996-07-05 AT AT96110899T patent/ATE213678T1/de not_active IP Right Cessation
- 1996-07-09 JP JP8211825A patent/JPH09122902A/ja active Pending
- 1996-07-15 ZA ZA966009A patent/ZA966009B/xx unknown
- 1996-07-15 KR KR1019960028514A patent/KR970005458A/ko not_active Application Discontinuation
- 1996-07-22 CN CN96109932A patent/CN1146938A/zh active Pending
- 1996-07-23 AU AU60650/96A patent/AU725323B2/en not_active Ceased
Also Published As
Publication number | Publication date |
---|---|
ATE213678T1 (de) | 2002-03-15 |
AU725323B2 (en) | 2000-10-12 |
AU6065096A (en) | 1997-01-30 |
DE19526967A1 (de) | 1997-02-13 |
CN1146938A (zh) | 1997-04-09 |
DE59608780D1 (de) | 2002-04-04 |
ZA966009B (en) | 1997-01-31 |
KR970005458A (ko) | 1997-02-19 |
EP0755740A1 (de) | 1997-01-29 |
JPH09122902A (ja) | 1997-05-13 |
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