EP1450974B1 - Aus heizbarem giessgefäss und einem heizstand bestehende vorrichtung - Google Patents
Aus heizbarem giessgefäss und einem heizstand bestehende vorrichtung Download PDFInfo
- Publication number
- EP1450974B1 EP1450974B1 EP02794964A EP02794964A EP1450974B1 EP 1450974 B1 EP1450974 B1 EP 1450974B1 EP 02794964 A EP02794964 A EP 02794964A EP 02794964 A EP02794964 A EP 02794964A EP 1450974 B1 EP1450974 B1 EP 1450974B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- vessel
- casting
- slits
- ladle furnace
- magnetic coil
- 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
- H05B6/22—Furnaces without an endless core
- H05B6/24—Crucible furnaces
-
- 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
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B14/00—Crucible or pot furnaces
- F27B14/06—Crucible or pot furnaces heated electrically, e.g. induction crucible furnaces with or without any other source of heat
- F27B14/061—Induction furnaces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B14/00—Crucible or pot furnaces
- F27B14/08—Details peculiar to crucible or pot furnaces
- F27B2014/0843—Lining or casing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B14/00—Crucible or pot furnaces
- F27B14/08—Details peculiar to crucible or pot furnaces
- F27B2014/0862—Flux guides
Definitions
- the invention relates to a device according to the preamble of claim 1.
- the metals In order to bring a metal or a metal alloy into a pourable state, The metals must first be melted, then possibly a metallurgical Intermediate treatment and finally the casting process itself be supplied.
- the melting of the metallic raw materials is usually done in a large volume Melting furnace, from where the melts in a pan and from there in be transferred to a casting plant.
- many metals or metal alloys are sensitive to temperature changes, tend to be oxygen and hydrogen or others over the air or by contact with the ones used Vessels entering the melt other substances, such.
- Z.T. also form undesirable chemical reactions on the respective molten metal scumbles. Many of the above reactions are favored by one or more refilling of the molten metal.
- Negative effects also occur when the molten aluminum with moisture, z. As humid air, comes into contact. Due to the high temperatures the water splits into its components hydrogen and oxygen, whereby dissolved hydrogen in the melt during the solidification process in the form of trapped Gas bubbles again excreted; by hydrogen abstraction formed pores interrupt the structure in the casting.
- Remedy can indeed supply so-called induction conveyors, for example from a smelting furnace into a tiltable treatment and casting furnace the liquid Transfer aluminum or aluminum alloy.
- induction conveyors for example from a smelting furnace into a tiltable treatment and casting furnace the liquid Transfer aluminum or aluminum alloy.
- eddy currents are generated, whereby a mechanical force is exerted in interaction with the metal can, that moves the metal.
- the induced eddy currents heat the Liquid metal also on, so that temperature losses can be compensated.
- induction crucible furnaces in which by means of the existing magnetic coil both a molten bath movement produced as well as a warming is guaranteed.
- induction troughs in which by means of the existing magnetic coil both a molten bath movement produced as well as a warming is guaranteed.
- induction troughs in which it is necessary that the inner wall of non-magnetic, electrically non-conductive refractory material, so that the magnetic fields not affected and the heat development occurs directly in the melt.
- Induction troughs for conveying molten metal between two metallurgical are design and costly. In addition, they need this Gutter space and allow for any flexibility.
- From DE 20 35 221 B is a device for keeping warm of metallic Melting in a ladle known, lined with refractory material is and a stationary, designed as a self-contained unit electro-inductive Heating device and has a, usable in this transportable ladle, their jacket completely or at least in the range of the action of the heater made of electrically non-conductive material.
- the coat of the ladle can completely or at least in the range of the action of the heater of a preferably through deposits such as glass fiber reinforced plastic or longitudinally laminated Sheets exist, between each of which a Kunststoffisolier für is provided. This measure is intended to damage the pan in the electro-inductive Heating of the molten metal contained in it are avoided
- the ladle is structurally very expensive.
- Another electro-inductive heating device with a removable container is from EP 0 612 201 A2.
- the casting vessel described therein has a Covering of individual, evenly arranged in the circumferential direction, non-magnetic Metal bars, whose free ends in the upper and in the lower area held together by a metal ring.
- the outer oxide layer of a Each metal rod should serve as an electrical insulator in the area of the shocks to to prevent a disturbance of the magnetic field. Also this vessel has a constructive elaborate construction.
- this vessel both as a transport vessel as well as a holding, alloying and / or degassing vessel and if necessary can also be used as a ladle, from which by means of a ladle desired batches are taken.
- the from a melting vessel in the Casting vessel transferred molten metal is transferred to a heating station, where the Casting vessel is opened or used and the melt inductively heated and a Badonia is generated.
- post-treatments like the Degas, Kornfeinen or even alloy adjustments are made, before the ladle is removed from the heating and led to the casting plant which is a rotary table for chill casting or a continuous casting plant can.
- the pouring vessels preferably have a filling volume from 1 to 3 tons.
- the vessel structure is basically of ladle metallurgy known, i. the vessels have a refractory lining and an outer one Metal sheath, which may not be ferromagnetic in the lower area to the desired magnetic field structure and the generation of eddy currents in the Melt does not affect.
- the metal shell according to the invention in bottom area slit-shaped openings, which are located on Found casting vessel at the level of the magnetic coil. The said slots prevent in structurally simple way a large-scale generation of eddy currents, the overheating and damage to the ladle.
- the slots are arranged longitudinally axially, wherein the length of the Slots between 120% and 150% of the length of the solenoid is, i. that the Slots the solenoid project in the longitudinal axial direction above and below.
- the Width of the slots is between 2 mm and 10 mm.
- the number of slots, which are preferably arranged equidistant in the vessel shell are determined essentially by the casting vessel diameter. At the before indicated fill volumes should be 4, 6, 8 or more slots in the metal jacket to be available.
- the magnetic coil is preferred surrounded by an iron core (yokes).
- the location of the slots in the casting vessel shell is approximately congruent in height after a further embodiment of the invention with the location of the yokes.
- the heating stand has a magnetic coil, preferably at least two Contains windings and which is surrounded by an iron core (yokes).
- the multiple winding The magnet coil provides the advantage that minimizes the Schustand height can be, e.g. on 150 to 300 mm, because of the multi-layer winding a correspondingly higher desired performance can be provided.
- the Magnet coil and the yokes are preferably arranged in a frame, the then form the heating stand.
- the heating level is height adjustable, which has the advantage that the remote on existing columns or a frame and centered vessel is then coupled to the heating station by the Heating station ramped up the lower area resp.
- the heating is preferably made an annular base, in which the magnetic coil is integrated.
- the vessel points in its lower portion has an outer shape that matches the inner surface of the annular Sockels is adapted, i. that with attached or inserted vessel between the magnet coil and the vessel jacket a dimensionally adapted Air gap remains. Should the frame with yokes and coil after positioning the inductive vessel by hydraulic lifting around the lower area of the Be laid, serves as a support frame or supports are present, have the corresponding adapted to the vessel bearing surface.
- the transition area of the vessel from the lower part to the larger cross-section Upper part can according to an alternative embodiment as a collar-shaped bearing surface formed corresponding to the roof surface of the annular base. These The design is designed for fixed, non-height-adjustable heating stands be.
- the above-described vessel as a transport, holding, alloying, degassing and / or pouring vessel for Molten metals, used in particular of aluminum or aluminum alloys, preferably in the way that the casting vessel on a rotary table system with several Working positions or linear system is used for chill casting.
- the illustrated vessel 1 is placed on a heating stand 2.
- the vessel 1 has an upper region with a diameter D 1 of 1100 mm, an intermediate region in which the diameter tapers and a lower region with a diameter D 2 of 500 mm, which is adapted to the geometry of the ladle used. From the dimensions results in a capacity of about 2 tons (2000 kg) of aluminum.
- the vessel 1 has an insulating refractory lining and an outer metal sheath.
- the metal shell 4 in the lower region consists of a non-ferromagnetic material, eg VA steel.
- a double-layered magnet coil 5 which is enclosed by an iron core (yokes 7), is arranged around the lower, for example cylindrical outer jacket made of VA steel.
- the coil 5 and the yokes 7 are installed in a common frame 8 which can be raised and lowered, as shown by the double arrow 9.
- Existing lifting devices not shown, preferably operate hydraulically.
- As a support for the vessel 1 serve three supports 10 in the present case, which undercut the vessel in the conical intermediate area.
- the outer metal shell of the casting vessel in the lower Range i. slotted in height of the solenoid coil 5.
- the slots 13 extend longitudinally and project beyond the magnet coil or its longitudinal axial height respectively above and bottom, wherein the length of the slots at least 1.2 times the longitudinal axial Length of the solenoid is.
- the solenoid is surrounded by yokes 7, the (in height) are approximately congruent with the slots 13.
- the slots overhang the yokes each top and bottom.
- the illustrated vessel serves in the present case as a means of transport for herein filled melt volume and as an alloying, holding and degassing vessel.
- the molten metal removed from a molten metal or the metal alloy remains during transport, any intermediate storage or an intermediate treatment, namely the degassing until the pouring in one and the same container, so that a Umgeh manen in other vessels or ovens avoided becomes.
- Can molten metal due to procedural or operational reasons from the smelting furnace can not be transferred directly to the casting plant can at an intermediate station another heating station 2 be installed stationary, on the in the manner shown, the vessel 1 and placed by appropriate inductive Heating is maintained at the desired temperature. At this stopover metallurgical treatments of the melt are possible.
- the alloy taken from the furnace is transferred to a pan leading to an intermediate station with a heating stand is transported, where the pan deposited on existing supports and then the Heating level is raised hydraulically until the lower area of the pan of the Magnetic coil is surrounded.
- this intermediate station the molten metal, e.g. by injecting nitrogen or argon, degassed. Occurring temperature losses are compensated by the heating energy introduced via the heating station.
- the metal melt is peeled off as needed and the pan closed transported in a casting plant, where they in a similar manner as previously described first centered on an existing heating station and then is raised by lifting the Schustandes to this.
- the pan can do it afterwards by means of a ladle, the molten metal batch for pouring in Molds, e.g. are arranged on a casting carousel, taken successively become.
- the lower taper of the vessel serves on a ladle adapted diameter for the purpose that the pan almost completely emptied can be.
- the combination of the vessel and the heating station according to the invention can be used for any metal or metal alloy melts, in particular then when Umg screenvortician should be avoided if possible.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electromagnetism (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Furnace Details (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- General Induction Heating (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
- Crucibles And Fluidized-Bed Furnaces (AREA)
Description
- Fig. 1
- einen Querschnitt durch ein Gießgfäß, das an einen Heizstand angekoppelt ist und
- Fig. 2
- eine weitere teilgeschnittene Ansicht des Gießgefäßes nach Fig. 1.
Claims (8)
- Aus einem heizbaren, eine feuerfeste Auskleidung und einen äußeren Metallmantel aufweisendes Gießgefäß (1) für metallisches Schmelzgut, insbesondere für Aluminiumschmelzen, und einem Heizstand (2) mit einer Magnetspule (5) bestehende Vorrichtung, bei der das Gießgefäß (1) auf dem stationären Heizstand (2) lösbar aufgesetzt ist,
dadurch gekennzeichnet, dass der Metallmantel des Gießgefäßes (1) geschlitzt ist, sodaß er mehrere, vorzugsweise längsaxial angeordnete, schlitzförmige Durchbrechungen (13) aufweist, die sich bei aufgesetztem Gießgefäß (1) in der Höhe der Magnetspule (5) befinden, wobei die Länge der Schlitze (13) zwischen 120 % und 150 % der Länge der Magnetspule (5) beträgt und die Breite der Schlitze (13) zwischen 2 mm und 10 mm liegt. - Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Schlitze (13) in äquidistantem Abstand angeordnet sind und/oder dass mindestens 4 Schlitze vorhanden sind.
- Vorrichtung nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass die Magnetspule (5) von einem Eisenkern (Joche) (7) umgeben ist und dass die Lage der Schlitze (13) bei aufgesetztem Gießgefäß (1) in der Höhe etwa deckungsgleich mit der Lage der Joche (7) ist.
- Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Heizstand (2) eine Magnetspule (5) aufweist, die vorzugsweise mindestens zwei Wicklungen enthält, und von einem Eisenkern (7) umgeben ist.
- Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass der Heizstand (2) höhenverstellbar, vorzugsweise hydraulisch höhenverstellbar ist.
- Vorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass der Heizstand aus einem ringförmigen Sockel besteht, in dem die Magnetspule (5) integriert ist und dass das Gefäß (1) in seinem unteren Bereich eine äußere Form aufweist, die dem Innenmantel des ringförmigen Sockels (8) angepasst ist.
- Vorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass der Übergang des Gefäßes vom unteren Bereich in den querschnittsgrößeren oberen Bereich des Gefäßes als kragenförmige Auflagefläche korrespondierend zur Dachfläche des ringförmigen Sockels (8) ausgebildet ist.
- Verwendung des Gefäßes (1) nach einem der Ansprüche 1 bis 7 als Transport-, Warmhalte-, Legierungs-, Entgasungs- und/oder Gießgefäß für Metallschmelzen, insbesondere aus Aluminium oder Aluminiumlegierungen, vorzugsweise an einer Rundtischanlage mit mehreren Arbeitspositionen oder an einer Linearlinie mit Metallentnahme-, Pfannenentnahme- und Entgasungsposition.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10159306A DE10159306A1 (de) | 2001-12-04 | 2001-12-04 | Induktiv heizbares Gefäß für metallisches Schmelzgut und Verwendung dieses Gefäßes |
DE10159306 | 2001-12-04 | ||
PCT/DE2002/004407 WO2003047792A1 (de) | 2001-12-04 | 2002-12-02 | Aus heizbarem giessgefäss und einem heizstand bestehende vorrichtung |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1450974A1 EP1450974A1 (de) | 2004-09-01 |
EP1450974B1 true EP1450974B1 (de) | 2005-06-15 |
EP1450974B8 EP1450974B8 (de) | 2005-08-17 |
Family
ID=7707864
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02794964A Expired - Lifetime EP1450974B8 (de) | 2001-12-04 | 2002-12-02 | Aus heizbarem giessgefäss und einem heizstand bestehende vorrichtung |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1450974B8 (de) |
AT (1) | ATE297825T1 (de) |
AU (1) | AU2002360884A1 (de) |
DE (2) | DE10159306A1 (de) |
WO (1) | WO2003047792A1 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004008044A1 (de) * | 2004-02-19 | 2005-09-08 | INDUGA Industrieöfen und Giesserei-Anlagen GmbH & Co. KG | Aus heizbarem Gießgefäß und einem Heizstand bestehende Vorrichtung |
DE102013114811B3 (de) | 2013-12-23 | 2014-12-31 | Ald Vacuum Technologies Gmbh | Vorrichtung und Verfahren zum Behandeln von metallischem Material |
DE102014110251A1 (de) * | 2014-07-21 | 2016-01-21 | Stephan Schwenkel | Schmelzaggregat zum Einschmelzen von Gusswerkstoffen sowie ein Verfahren zur Herstellung einer Schmelze für das Gießen |
CN106643151A (zh) * | 2016-11-28 | 2017-05-10 | 无锡市莱达热工工程有限公司 | 熔锌保温炉 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1795842A (en) * | 1929-01-08 | 1931-03-10 | Westinghouse Electric & Mfg Co | Induction furnace |
GB893862A (en) * | 1957-09-04 | 1962-04-18 | Wild Barfield Electr Furnaces | Induction heated furnaces |
DE1136435B (de) * | 1958-03-19 | 1962-09-13 | Aeg | Rinnenloser Induktionstiegelofen zum Schmelzen von Metallen, UEberhitzen und Warmhalten von Metallschmelzen |
DE2035221B1 (de) * | 1970-07-16 | 1971-10-14 | Deutsche Edelstahlwerke AG, 4150Krefeld | Einrichtung zum Warmhalten von metallischen Schmelzen |
JPS59143559U (ja) * | 1983-03-18 | 1984-09-26 | 川崎製鉄株式会社 | 溶鋼加熱装置付き連鋳タンデイツシユ |
SE452190B (sv) * | 1984-02-06 | 1987-11-16 | Asea Ab | Skenk eller vermare (tundish) for induktiv vermning och/eller omroring av metalliska smeltor sasom stal |
DE3910777C2 (de) * | 1989-04-04 | 2001-08-09 | Ald Vacuum Techn Ag | Induktionsofen mit einem metallischen Tiegel |
JP2692367B2 (ja) * | 1989-11-09 | 1997-12-17 | 富士電機株式会社 | 取鍋の浴湯加熱装置 |
US5425048A (en) * | 1990-01-31 | 1995-06-13 | Inductotherm Corp. | Heating apparatus for induction ladle and vacuum furnaces |
DE20119657U1 (de) * | 2001-12-04 | 2002-03-21 | INDUGA Industrieöfen und Gießerei-Anlagen GmbH & Co. KG, 50739 Köln | Induktiv heizbares Gefäß für metallisches Schmelzgut |
-
2001
- 2001-12-04 DE DE10159306A patent/DE10159306A1/de not_active Withdrawn
-
2002
- 2002-12-02 DE DE50203641T patent/DE50203641D1/de not_active Expired - Lifetime
- 2002-12-02 AU AU2002360884A patent/AU2002360884A1/en not_active Abandoned
- 2002-12-02 EP EP02794964A patent/EP1450974B8/de not_active Expired - Lifetime
- 2002-12-02 AT AT02794964T patent/ATE297825T1/de not_active IP Right Cessation
- 2002-12-02 WO PCT/DE2002/004407 patent/WO2003047792A1/de not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
EP1450974A1 (de) | 2004-09-01 |
DE50203641D1 (de) | 2005-08-18 |
WO2003047792A8 (de) | 2005-08-18 |
AU2002360884A1 (en) | 2003-06-17 |
ATE297825T1 (de) | 2005-07-15 |
EP1450974B8 (de) | 2005-08-17 |
DE10159306A1 (de) | 2003-06-12 |
WO2003047792A1 (de) | 2003-06-12 |
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