EP0275384B1 - Récipient métallurgique en particulier four électrique avec ou plusieurs électrodes de fond - Google Patents

Récipient métallurgique en particulier four électrique avec ou plusieurs électrodes de fond Download PDF

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Publication number
EP0275384B1
EP0275384B1 EP87116369A EP87116369A EP0275384B1 EP 0275384 B1 EP0275384 B1 EP 0275384B1 EP 87116369 A EP87116369 A EP 87116369A EP 87116369 A EP87116369 A EP 87116369A EP 0275384 B1 EP0275384 B1 EP 0275384B1
Authority
EP
European Patent Office
Prior art keywords
contact
side bars
vessel
bottom electrode
metallurgic
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
EP87116369A
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German (de)
English (en)
Other versions
EP0275384A1 (fr
Inventor
Heinz Guido
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.)
MAN Gutehoffnungshutte GmbH
Original Assignee
MAN Gutehoffnungshutte GmbH
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 MAN Gutehoffnungshutte GmbH filed Critical MAN Gutehoffnungshutte GmbH
Priority to AT87116369T priority Critical patent/ATE64513T1/de
Publication of EP0275384A1 publication Critical patent/EP0275384A1/fr
Application granted granted Critical
Publication of EP0275384B1 publication Critical patent/EP0275384B1/fr
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
    • H05B7/00—Heating by electric discharge
    • H05B7/02—Details
    • H05B7/06—Electrodes

Definitions

  • Electric furnaces in particular direct current arc furnaces, have a contact device in their base, which makes the necessary electrical contact with the scrap or the melt during the melting process.
  • Such a contact device is e.g. described in EP-B1 0 058 817.
  • This replacement is preferably done by removing the bottom electrode in one piece from the furnace vessel and replacing it with a new one.
  • the power cables remain suspended from the bottom of the furnace.
  • a base electrode arrangement for a direct current arc furnace which describes a single base electrode in several embodiments, preferably round or also polygonal, the cross section of which tapers towards the interior of the furnace, expands or remains cylindrical around it to be able to expand from the outside towards the inside of the furnace.
  • the connecting piece is designed as a contact sleeve, preferably made of copper.
  • the bottom electrode is supported on the side surfaces of the contact sleeve and the connector is provided with cooling channels which are closed towards the electrode.
  • the contact tabs on the connector of the bottom electrode are connected to the electrical power supply cables by means of screw connections. In contrast to the invention, these tabs are to be loosened or fastened by a screw connection.
  • the object of the invention is to provide a suspension for the power cable on the mating contact of the bottom electrode, which at the same time in a simple manner produces the reliable attachment to the bottom electrode required for the power line and which adapts without constraint and alignment inaccuracies.
  • the configuration of the suspension device according to the invention is also characterized in that the contact devices can be reused even after the bottom electrode has been changed several times.
  • Fig. 1 shows the furnace vessel (1) with the refractory lining (2) located inside.
  • the bottom electrode consisting of a support plate (3), base plate (4), contact rods (5), counter contact (14) and refractory stamping (6) can be seen.
  • the power cables (7) are attached to the tabs (8).
  • the straps are suspended in a clamping frame (10) by means of supporting bolts (9).
  • the tenter frame (10) is fastened to two supports (11), which are in turn anchored to the furnace vessel.
  • Fig. 2 shows the details of the arrangement described.
  • the connection between the support bolts (9) and the bracket (8) is angularly movable, for example, a spherical bearing. Due to the angular mobility, the tab is able to contact the counter contact (14) of the base electrode exactly without squeezing.
  • a spring (13) which is installed in the clamping frame (10), presses the tab (8) against the mating contact (14) by means of displaceable support bolts (9) and articulated bearings (12).
  • the opening of the contact device necessary for replacing the base electrode takes place in such a way that the supporting bolts (9) are withdrawn from outside the clamping frame. This also pulls the tabs (8) back and opens the contact.
  • FIG. 3 shows the device in a sectional view rotated by 90 °. It can be seen that the clamping frame (10) is fastened to the insulators (16) by means of a sliding connection (15). By means of this sliding connection, the clamping frame (10) can automatically align itself with the mating contact (14) when the tabs (8) are pressed on. This freedom from torsion of the tabs (8) achieved by the sliding connection and the angular mobility of the spherical bearings ensure that the tabs (8) are correctly seated against the counter contact (14) and that the pressure is distributed evenly over the entire contact surface.
  • the insulators (16) are attached to the carriers (11).
  • the carriers (11) are attached to the furnace vessel (1). This arrangement has the effect that the current flows exclusively into the melt via the tabs and the bottom electrode.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Furnace Details (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Discharge Heating (AREA)
  • Installation Of Indoor Wiring (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)

Claims (5)

  1. Récipient métallurgique, notamment four électrique avec une ou plusieurs électrodes de fond (5), au contact antagoniste (14) desquelles sont raccordés les câbles (7) d'amenée du courant fixés sur des languettes (8), récipient métallurgique caractérisé en ce que les languettes (8) constituent les pièces de contact pour le contact antagoniste (14) de l'électrode de fond (5), en ce que les languettes (8) sont fixées au moyen de goujons porteurs (9) dans des paliers à rotules (12) et sont disposées de façon à pouvoir coulisser horizontalement, et en ce que les languettes (8) sont pressées par des ressorts (13) contre le contact antagoniste (14) de l'électrode de fond (5).
  2. Récipient métallurgique selon la revendication 1, caractérisé en ce que les languettes (8) sont pressées mécaniquement, pneumatiquement ou hydrauliquement contre le contact antagoniste (14) de l'électrode de fond (5) au moyen de goujons porteurs (9).
  3. Récipient métallurgique selon les revendications 1 et 2, caractérisé en ce que les languettes (8) sont suspendues à des goujons porteurs (9) dans un cadre de serrage (10) qui est relié au récipient (1) par l'intermédiaire de supports (11).
  4. Récipient métallurgique selon la revendication 1, caractérisé en ce que le cadre de serrage (10) pour les languettes (8) est isolé par rapport au récipient (1) par l'intermédiaire d'isolateurs (16).
  5. Récipient métallurgique selon les revendications 3 et 4, caractérisé en ce que le cadre de serrage (10) est fixé aux isolateurs (16) par l'intermédiaire d'une liaison coulissante (15).
EP87116369A 1987-01-22 1987-11-06 Récipient métallurgique en particulier four électrique avec ou plusieurs électrodes de fond Expired - Lifetime EP0275384B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87116369T ATE64513T1 (de) 1987-01-22 1987-11-06 Metallurgisches gefaess, insbesondere elektroofen mit einer oder mehreren bodenelektroden.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3701678 1986-01-22
DE19873701678 DE3701678A1 (de) 1987-01-22 1987-01-22 Metallurgisches gefaess, insbesondere elektroofen mit einer oder mehreren bodenelektroden

Publications (2)

Publication Number Publication Date
EP0275384A1 EP0275384A1 (fr) 1988-07-27
EP0275384B1 true EP0275384B1 (fr) 1991-06-12

Family

ID=6319236

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87116369A Expired - Lifetime EP0275384B1 (fr) 1987-01-22 1987-11-06 Récipient métallurgique en particulier four électrique avec ou plusieurs électrodes de fond

Country Status (9)

Country Link
US (1) US4843614A (fr)
EP (1) EP0275384B1 (fr)
JP (1) JPH076741B2 (fr)
AT (1) ATE64513T1 (fr)
BR (1) BR8800212A (fr)
DE (2) DE3701678A1 (fr)
ES (1) ES2022862B3 (fr)
MX (1) MX168377B (fr)
NO (1) NO171760C (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3817379C1 (fr) * 1988-05-18 1989-06-22 Mannesmann Ag, 4000 Duesseldorf, De
US5142650A (en) * 1989-11-14 1992-08-25 Asahi Glass Company Ltd. Bottom electrode for a direct current arc furnace
CA2054774C (fr) * 1990-03-19 1997-01-21 Nobuyoshi Takashiba Four electrique a courant continu pour fusion du metal
DE4108583C2 (de) * 1991-03-14 1997-06-05 Mannesmann Ag Vorrichtung zum Kuppeln der Stromzuführung zu einem metallurgischen Gefäß
DE4236510C2 (de) * 1992-10-26 1996-05-30 Mannesmann Ag Vorrichtung zum Einschmelzen von Schrott
FR2750537B1 (fr) * 1996-06-27 1998-08-28 Action Finances Ind Dispositif de connexion electrique d'une electrode en particulier d'un four metallurgique, a moyens de rappel

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH478465A (de) * 1967-11-20 1969-09-15 Boehler & Co Ag Geb Vorrichtung zum Anschliessen elektrischer Leitungen an Elektroden und/oder Bodenplatten, insbesondere in Anlagen zum Elektroschlackenumschmelzen von Metallen
DE3106741C2 (de) * 1981-02-24 1983-06-16 M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 4200 Oberhausen Kontaktelektroden-Anordnung für Lichtbogen- oder Widerstandsschmelzofen
CH664059A5 (de) * 1983-07-28 1988-01-29 Bbc Brown Boveri & Cie Elektrischer ofen, insbesondere gleichstromlichtbogenofen.

Also Published As

Publication number Publication date
ES2022862B3 (es) 1991-12-16
NO880239L (no) 1988-07-25
DE3701678A1 (de) 1988-08-04
EP0275384A1 (fr) 1988-07-27
US4843614A (en) 1989-06-27
BR8800212A (pt) 1988-08-30
DE3770798D1 (de) 1991-07-18
ATE64513T1 (de) 1991-06-15
NO171760B (no) 1993-01-18
NO171760C (no) 1993-04-28
MX168377B (es) 1993-05-20
NO880239D0 (no) 1988-01-21
JPS63259378A (ja) 1988-10-26
JPH076741B2 (ja) 1995-01-30

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