EP0275384B1 - Metallurgisches Gefäss, insbesondere Elektroofen mit einer oder mehreren Bodenelektroden - Google Patents
Metallurgisches Gefäss, insbesondere Elektroofen mit einer oder mehreren Bodenelektroden Download PDFInfo
- 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
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
- 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)
- Discharge Heating (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
- Installation Of Indoor Wiring (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Manufacture And Refinement Of Metals (AREA)
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 (de) | 1988-07-27 |
EP0275384B1 true EP0275384B1 (de) | 1991-06-12 |
Family
ID=6319236
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP87116369A Expired - Lifetime EP0275384B1 (de) | 1987-01-22 | 1987-11-06 | Metallurgisches Gefäss, insbesondere Elektroofen mit einer oder mehreren Bodenelektroden |
Country Status (9)
Country | Link |
---|---|
US (1) | US4843614A (pt) |
EP (1) | EP0275384B1 (pt) |
JP (1) | JPH076741B2 (pt) |
AT (1) | ATE64513T1 (pt) |
BR (1) | BR8800212A (pt) |
DE (2) | DE3701678A1 (pt) |
ES (1) | ES2022862B3 (pt) |
MX (1) | MX168377B (pt) |
NO (1) | NO171760C (pt) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3817379C1 (pt) * | 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 |
EP0474883B2 (en) * | 1990-03-19 | 2003-01-02 | Kawasaki Steel Corporation | Dc electric furnace for melting 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)
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. |
-
1987
- 1987-01-22 DE DE19873701678 patent/DE3701678A1/de not_active Withdrawn
- 1987-11-06 DE DE8787116369T patent/DE3770798D1/de not_active Expired - Lifetime
- 1987-11-06 EP EP87116369A patent/EP0275384B1/de not_active Expired - Lifetime
- 1987-11-06 AT AT87116369T patent/ATE64513T1/de not_active IP Right Cessation
- 1987-11-06 ES ES87116369T patent/ES2022862B3/es not_active Expired - Lifetime
- 1987-12-29 MX MX009944A patent/MX168377B/es unknown
-
1988
- 1988-01-21 JP JP63009774A patent/JPH076741B2/ja not_active Expired - Lifetime
- 1988-01-21 NO NO880239A patent/NO171760C/no unknown
- 1988-01-21 US US07/146,325 patent/US4843614A/en not_active Expired - Lifetime
- 1988-01-21 BR BR8800212A patent/BR8800212A/pt not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
JPH076741B2 (ja) | 1995-01-30 |
JPS63259378A (ja) | 1988-10-26 |
ATE64513T1 (de) | 1991-06-15 |
NO880239L (no) | 1988-07-25 |
DE3701678A1 (de) | 1988-08-04 |
ES2022862B3 (es) | 1991-12-16 |
NO171760C (no) | 1993-04-28 |
DE3770798D1 (de) | 1991-07-18 |
NO171760B (no) | 1993-01-18 |
BR8800212A (pt) | 1988-08-30 |
NO880239D0 (no) | 1988-01-21 |
MX168377B (es) | 1993-05-20 |
EP0275384A1 (de) | 1988-07-27 |
US4843614A (en) | 1989-06-27 |
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