EP0785836B1 - Heiz und giesspfanne für metallschmelze - Google Patents

Heiz und giesspfanne für metallschmelze Download PDF

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Publication number
EP0785836B1
EP0785836B1 EP95939307A EP95939307A EP0785836B1 EP 0785836 B1 EP0785836 B1 EP 0785836B1 EP 95939307 A EP95939307 A EP 95939307A EP 95939307 A EP95939307 A EP 95939307A EP 0785836 B1 EP0785836 B1 EP 0785836B1
Authority
EP
European Patent Office
Prior art keywords
metal
cylinder
cavity
filling
area
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
EP95939307A
Other languages
English (en)
French (fr)
Other versions
EP0785836A1 (de
Inventor
Jean-Louis Comarteau
Alain Remy
Dieter Schluckebier
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.)
Otto Junker GmbH
SEVA SA
Original Assignee
Otto Junker GmbH
SEVA SA
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 Otto Junker GmbH, SEVA SA filed Critical Otto Junker GmbH
Publication of EP0785836A1 publication Critical patent/EP0785836A1/de
Application granted granted Critical
Publication of EP0785836B1 publication Critical patent/EP0785836B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D25/00—Devices or methods for removing incrustations, e.g. slag, metal deposits, dust; Devices or methods for preventing the adherence of slag
    • 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
    • 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
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/14—Charging or discharging liquid or molten material
    • 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
    • F27B14/02—Crucible or pot furnaces with tilting or rocking arrangements
    • 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
    • F27B2014/0875—Two zones or chambers, e.g. one used for charging

Definitions

  • the present invention relates to an oven or a pocket heater for holding liquid metal, in particular metals melting at high temperature, such as cast irons, steels or super alloys.
  • pockets of the type comprising a main element which has a cavity delimited by a refractory lining and intended to be charged with molten metal, this cavity being provided with a filling opening and a metal outlet communicating with said cavity, and heating means metal.
  • the cavity is intended to be loaded with metal in fusion maintained at temperature.
  • the invention offers to provide an oven or a heating pocket of maintenance of liquid metal remedying all of the disadvantages mentioned above.
  • the invention aims to provide a heating bag which the design facilitates the flow of liquid metal, especially during metal removal operations liquid, as well as all measurement operations, subsequent cleaning and maintenance.
  • the invention relates to a pocket, aforementioned kills, characterized in that said cavity comprises a bath foot area and a reserve area, the volume of the bath foot area being less than the volume of the reserve area, the bath foot area being at the lower part of a main cylinder with an inclined YY axis especially at an angle of about 30 ° in the position for serving the pocket, the shape of said cavity being without blind spot so as to obtain a flow regular liquid metal and allowing access through said filling opening, at each point of the cavity, in particular for the purpose of hot descaling of the ladle.
  • the installation shown has a pocket heater 1 composed of three sub-assemblies: one set for heating the liquid metal, represented in the form an inductor assembly 2, an outlet orifice 3 of metal 4 and a main element 5.
  • the function of inductor assembly 2 is to keep the metal at a certain temperature.
  • the inductor assembly 2 surrounds an area of heating 6 in the form of a deep bowl delimited by a refractory lining 7. This refractory lining 7 is surrounded by a medium frequency field coil 8 intended to heat the liquid metal 4 by induction, the assembly being housed in a carcass element 9.
  • the inductor assembly 2 also includes means for attachment to main element 5, which can be all appropriate means available to the skilled person, and including a flange and bolt system 10.
  • the main element 5 of the pocket 1 has a carcass 11 in which a lining 12 is arranged refractory material. Inside this lining 12 is a cavity 13 made up of several volumes geometric, and comprising at least one opening.
  • the heating zone 6 of the inductor assembly 2 is also cylindrical, of the same diameter as a cylinder main 14 of main element 5, and tilted like it upwards at a certain angle to the horizontal, so as to define a common axis Y-Y. In the embodiment of the invention which is shown, this angle is of the order of 30 °, and the diameter of the area heating 6 and the main cylinder 14 is 225 mm.
  • the internal cavity 13 of the main element 5 still has a third volume consisting of an area reserve 15 of liquid metal 4.
  • This reserve area 15 constitutes the downward extension of a cylinder of filling 16 of axis Y'Y 'parallel to a common axis YY of the heating zone 6 and main cylinder 14.
  • the axis Y'-Y 'of the filling cylinder 16 is by therefore parallel, in a vertical plane, and shifted towards the top with respect to the Y-Y axis, and the cylinder of filling 16 has a substantially larger diameter important that the diameter of the main cylinder 14.
  • the main cylinder 14 and filling cylinder 16 are arranged to have their lower generatrix 17 common.
  • connection zone 18 has a shape substantially frustoconical with rounds 19, 20 achieving a progressive junction between the two cylinders 14, 16.
  • Cylinders 14, 16 can be provided a slight draft oriented towards an opening of filling 21, so as to allow easy manufacture the main element 5 and its reserve zone 15 by molding of refractory material around a core.
  • capacity useful of the temperature maintenance pocket 1 which corresponds to the volume of cavity located between a low mark A near a lower end 22 of the orifice outlet 3 and a high mark B corresponding to filling maximum of the pocket, is of the order of 550 kg for alloys with a density close to 7.
  • this useful capacity to another installation of casting, just change the dimensions of the elements of pocket 1.
  • the inductor winding 8 is traversed by a frequency current of 500 Hz associated with a power of 250 KW so as to obtain a homogeneous temperature of all liquid metal 4 without creating excessive mixing which would be detrimental to the refractory.
  • the filling opening 21 of the cylinder filling 16 is closed, while using the pocket 1, by a filling door 23 fixed on the carcass 11 in a removable and waterproof manner.
  • the bag 1 works as follows: starting from a pocket clean and free of dirt, we open the door filling 23 and the internal cavity 13 is charged with main element with liquid metal 4 until it reaches the level indicated by the mark B. A through opening 21, we proceed to the skimming of impurities possibly present on the surface of the metal, and we measure the temperature of the metal. We then close the filling door 23 sealingly.
  • the pocket After a predetermined period, the pocket is returned to its original position.
  • the pocket can also be used by adapting pressurization means through the filling door 23 or the carcass 11 and the lining 12.
  • pressurization means make it possible to withdraw the liquid metal through the outlet 3 without have to rotate the pocket.
  • This type of device can be used for gravity casting of workpieces foundry; the use of pressure to precisely control the regularity of direct debits liquid metal.
  • the level liquid metal in the reserve zone 15 of the element main 5 descended to low level A. At this point you fill the pocket 1 as indicated above or stops the casting campaign.
  • the pocket of maintaining temperature 1 according to the invention meets the objectives set, due to the particular form and the arrangement of elements of reserve area 15 of main element 5, in conjunction with the shape and arrangement of the filling opening 21 of the main element 5.
  • this shape is specially suitable for casting metal, as well as cleaning, measurement and maintenance of the pocket 1.
  • the inductor winding 8 is traversed by an average current or low frequency, especially from 50 to 1500 Hertz.
  • the pocket requires to be preheated before filling.
  • This preheating is performed by means of a burner operating on oxygen and with natural gas, placed at the opening of filling 21.
  • the presence of the outlet orifice 3 allows the evacuation of combustion products, in particular the absence of evacuation, the water vapor emitted by this type burner may generate dissolved gases (hydrogen ...) in the metal.
  • Said dissolved gases provide a number of metallurgical disadvantages such as blisters, porosities, inclusions, even fragility of products made with metal. Consequently, steam evacuation by the device according to the invention remedies these drawbacks.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • General Induction Heating (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)

Claims (8)

  1. Pfanne (1) zum Halten von Metall (4) auf Temperatur mit einem Hauptteil (5), das einen Hohlraum (13) umfaßt, der durch eine Feuerfestauskleidung (12) begrenzt ist und dazu vorgesehen ist, mit geschmolzenem Metall beladen zu werden, wobei dieser Hohlraum zumindest mit einer Füllöffnung (21), einer Metallauslaßöffnung (3), die mit dem Hohlraum in Verbindung steht, sowie einer Vorrichtung (2) zum Heizen des Metalls versehen ist, wobei der Hohlraum (13) einen Schmelzbodenbereich und einen Reservebereich (15) umfaßt, wobei das Volumen des Schmelzbodenbereichs geringer als das Volumen des Reservebereichs ist, und wobei die Form des Hohlraums (13) ohne tote Winkel ist, dadurch gekennzeichnet, daß der Hohlraum (13) einen Füllzylinder (16) umfaßt, der an der Füllöffnung (21) endet, wobei der Reservebereich (15) des flüssigen Metalls mit dem Zylinder (16), mit einem Hauptzylinder (14) und mit der Auslaßöffnung (3) in Verbindung steht, wobei die Zylinder (14, 16) mit den Achsen (YY, Y'Y') parallel sind und wobei der Füllzylinder (16) seine Achse (Y'Y') in Bezug auf die Achse (YY) des Hauptzylinders (14) nach oben verschoben hat.
  2. Pfanne nach Anspruch 1, dadurch gekennzeichnet, daß der Füllzylinder (16) einen größeren Durchmesser besitzt als den Durchmesser des Hauptzylinders (14), um auf diese Weise den Reservebereich (15) für flüssiges Metall zu bilden, wobei der Reservebereich (15) über eine Verbindungszone (18) von im wesentlichen kegelstumpfartiger Gestalt, die mit Rundungen (19, 20) versehen ist, mit dem Hauptzylinder (14) verbunden ist.
  3. Pfanne nach Anspruch 1, dadurch gekennzeichnet, daß die Achsen (YY, Y'Y') der Zylinder (14,16), die in einer vertikalen Ebene enthalten sind, nach oben in Richtung der Füllöffnung (21) geneigt sind.
  4. Pfanne nach einem der vorgehenden Ansprüche, dadurch gekennzeichnet, daß sie eine Verschlußvorrichtung (23) umfaßt, um thermische Verluste des Metalls zu begrenzen und / oder die Oberfläche des Metalls zu inaktivieren.
  5. Pfanne nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Heizvorrichtung (2) eine Induktionsspule (8) umfaßt, die eine zylindrische Heizzone (6) mit derselben Achse (YY) und vorzugsweise mit demselben Durchmesser wie der Hauptzylinder (14) umgibt, und insbesondere auf dem Hauptteil (5) in entfernbarer Weise angebracht ist.
  6. Pfanne zum Gießen nach dem vorhergehenden Anspruch, dadurch gekennzeichnet, daß die Induktionsspule (8) von einem Strom mit mittlerer oder niedrigen Frequenz, insbesondere von 50 bis 1500 Hertz, durchflossen wird, um das Metall (4) auf Temperatur und in einer ruhigen und homogenen Durchmischung zu halten.
  7. Pfanne zum Gießen nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß ein Brenner, der an der Füllöffnung (21) angeordnet ist, ein Vorheizen der Pfanne mit einer Entfernung der Verbrennungsprodukte durch die Auslaßöffnung (3) erlaubt.
  8. Pfanne zum Gießen nach Anspruch 7, bei welcher der Brenner zum Vorheizen mit Sauerstoff und Erdgas arbeitet.
EP95939307A 1994-10-31 1995-10-30 Heiz und giesspfanne für metallschmelze Expired - Lifetime EP0785836B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9413155 1994-10-31
FR9413155A FR2726211B1 (fr) 1994-10-31 1994-10-31 Une poche de chauffage et de coulee de metaux liquides
PCT/FR1995/001433 WO1996013349A1 (fr) 1994-10-31 1995-10-30 Une poche de chauffage et de coulee de metaux liquides

Publications (2)

Publication Number Publication Date
EP0785836A1 EP0785836A1 (de) 1997-07-30
EP0785836B1 true EP0785836B1 (de) 1999-07-14

Family

ID=9468479

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95939307A Expired - Lifetime EP0785836B1 (de) 1994-10-31 1995-10-30 Heiz und giesspfanne für metallschmelze

Country Status (8)

Country Link
US (1) US5882582A (de)
EP (1) EP0785836B1 (de)
AU (1) AU4118996A (de)
CA (1) CA2204137C (de)
DE (1) DE69510811T2 (de)
ES (1) ES2136889T3 (de)
FR (1) FR2726211B1 (de)
WO (1) WO1996013349A1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE602005004300T2 (de) * 2004-09-02 2009-01-15 University Of Cape Town Giessverfahren und -vorrichtung
WO2019147560A1 (en) * 2018-01-23 2019-08-01 Inductotherm Corp. Sealed tilt pour electric induction furnaces for reactive alloys and metals
CN112658214B (zh) * 2020-11-17 2023-08-18 中国航发西安动力控制科技有限公司 一种用于减少氧化夹杂的开放式加热保温料斗及浇注方法
CN112524618B (zh) * 2020-11-27 2023-08-22 重庆商勤禹水环境科技有限公司 便于排渣的废盐熔融炉

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE748059C (de) * 1940-07-17 1944-10-25 Ulrich Schwedler Dr Ing Reinigungsvorrichtung fuer Schmelzrinnen von Induktionsoefen
FR1359528A (fr) * 1963-05-31 1964-04-24 Ingenior Gunnar Schjelderup In Four électrique à induction à canal
DE1281121B (de) * 1966-11-30 1968-10-24 Krupp Gmbh Vorrichtung zur Entnahme von fluessigem Metall aus einem Gefaess
SE342900B (de) * 1970-06-10 1972-02-21 Graenges Essem Ab
SE371211B (de) * 1973-03-12 1974-11-11 Uddeholms Ab
FR2364719A1 (fr) * 1976-09-20 1978-04-14 Kuhn Sa Perfectionnement aux fours a induction pour la coulee ou pour la coulee continue et aux poches de traitement
DE3507648A1 (de) * 1985-03-05 1986-09-11 Klöckner-Humboldt-Deutz AG, 5000 Köln Vorrichtung und verfahren zum warmhalten von fluessigen metallschmelzen

Also Published As

Publication number Publication date
DE69510811D1 (de) 1999-08-19
FR2726211B1 (fr) 1997-01-17
CA2204137C (fr) 2001-08-07
CA2204137A1 (fr) 1996-05-09
DE69510811T2 (de) 1999-11-04
FR2726211A1 (fr) 1996-05-03
AU4118996A (en) 1996-05-23
EP0785836A1 (de) 1997-07-30
WO1996013349A1 (fr) 1996-05-09
US5882582A (en) 1999-03-16
ES2136889T3 (es) 1999-12-01

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