[go: up one dir, main page]

EP0543475A3 - Method and apparatus for renewing bottom electrodes in an arc furnace - Google Patents

Method and apparatus for renewing bottom electrodes in an arc furnace Download PDF

Info

Publication number
EP0543475A3
EP0543475A3 EP19920250340 EP92250340A EP0543475A3 EP 0543475 A3 EP0543475 A3 EP 0543475A3 EP 19920250340 EP19920250340 EP 19920250340 EP 92250340 A EP92250340 A EP 92250340A EP 0543475 A3 EP0543475 A3 EP 0543475A3
Authority
EP
European Patent Office
Prior art keywords
anode
renewing
arc furnace
bottom electrodes
arc
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.)
Granted
Application number
EP19920250340
Other languages
German (de)
Other versions
EP0543475B1 (en
EP0543475A2 (en
Inventor
Eckart Schunk
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.)
Vodafone GmbH
Original Assignee
Mannesmann AG
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 Mannesmann AG filed Critical Mannesmann AG
Publication of EP0543475A2 publication Critical patent/EP0543475A2/en
Publication of EP0543475A3 publication Critical patent/EP0543475A3/en
Application granted granted Critical
Publication of EP0543475B1 publication Critical patent/EP0543475B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Furnace Details (AREA)
  • Arc Welding In General (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Abstract

The invention relates to a method for repairing a bottom electrode which is used as an anode, a suitable material being applied onto the remaining head after a defined wear level is reached and this material being fused on by means of an arc (which is ignited between the cathode and the anode) to such an extent that a connection to the head of the anode exists. Furthermore, the invention relates to a device for carrying out the method, aids (50) being provided for generating the arc, to which aids (50) a cathode is connected which can be moved into an axial position with respect to the respective old anode (23) while the metallic material is being fused on. <IMAGE>
EP92250340A 1991-11-19 1992-11-16 Method and apparatus for renewing bottom electrodes in an arc furnace Expired - Lifetime EP0543475B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4138724 1991-11-19
DE4138724A DE4138724C2 (en) 1991-11-19 1991-11-19 Method and device for repairing an electrode

Publications (3)

Publication Number Publication Date
EP0543475A2 EP0543475A2 (en) 1993-05-26
EP0543475A3 true EP0543475A3 (en) 1993-10-06
EP0543475B1 EP0543475B1 (en) 1995-07-26

Family

ID=6445534

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92250340A Expired - Lifetime EP0543475B1 (en) 1991-11-19 1992-11-16 Method and apparatus for renewing bottom electrodes in an arc furnace

Country Status (3)

Country Link
EP (1) EP0543475B1 (en)
AT (1) ATE125664T1 (en)
DE (2) DE4138724C2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29602191U1 (en) * 1996-02-08 1996-03-21 Badische Stahl-Engineering GmbH, 77694 Kehl Bottom electrode
DE19815154C1 (en) * 1998-03-27 1999-08-05 Mannesmann Ag Bottom of a metallurgical vessel with a direct current electric arc unit

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4125737A (en) * 1974-11-25 1978-11-14 Asea Aktiebolag Electric arc furnace hearth connection
EP0133925A1 (en) * 1983-07-28 1985-03-13 BBC Aktiengesellschaft Brown, Boveri & Cie. Bottom electrode arrangement for a direct current arc furnace
DE3612174A1 (en) * 1986-04-11 1987-10-15 Krupp Stahl Ag Method and apparatus for lengthening steel heating electrodes of an aftertreatment plant for molten steel

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3339514A1 (en) * 1983-10-28 1985-05-09 Mannesmann AG, 4000 Düsseldorf ELECTRODE ARRANGEMENT IN WARM-TYPE VESSELS
DE3543278C1 (en) * 1985-12-05 1987-07-02 Mannesmann Ag Furnace vessel of a direct current arc furnace with bottom electrodes as well as associated bottom electrode
FR2622078B1 (en) * 1987-10-20 1990-03-09 Siderurgie Fse Inst Rech WALL ELECTRODE FOR ELECTRIC METALLURGICAL OVEN

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4125737A (en) * 1974-11-25 1978-11-14 Asea Aktiebolag Electric arc furnace hearth connection
EP0133925A1 (en) * 1983-07-28 1985-03-13 BBC Aktiengesellschaft Brown, Boveri & Cie. Bottom electrode arrangement for a direct current arc furnace
DE3612174A1 (en) * 1986-04-11 1987-10-15 Krupp Stahl Ag Method and apparatus for lengthening steel heating electrodes of an aftertreatment plant for molten steel

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 014, no. 404 (M-1018)31. August 1990 & JP-A-02 154 977 ( DAIDO STEEL CO. LTD. ) 14. Juni 1990 *

Also Published As

Publication number Publication date
ATE125664T1 (en) 1995-08-15
DE4138724C2 (en) 1997-05-28
DE4138724A1 (en) 1993-05-27
EP0543475B1 (en) 1995-07-26
EP0543475A2 (en) 1993-05-26
DE59203029D1 (en) 1995-08-31

Similar Documents

Publication Publication Date Title
AU578795B2 (en) Contact tip for welding electrode
PL287337A1 (en) Electrode and a plasma burner for arc welding
DK0441337T3 (en) Apparatus and method for controlling a welding cycle
EP0432528A3 (en) Process for the production of hard carbon layers and apparatus for carrying out the process
DE69300749D1 (en) Method and device for surface treatment.
DE3369263D1 (en) Method and apparatus for metal arc welding
EP0543475A3 (en) Method and apparatus for renewing bottom electrodes in an arc furnace
EP0904883A3 (en) Method for initiating an arc between a workpiece and a melting electrode
DE59202724D1 (en) Method and device for re-igniting an arc in an inert gas welding process.
EP1175951A3 (en) Method and apparatus for lap seam welding of sheet material
AU651214B2 (en) Direct-current arc furnace
DE69200302D1 (en) Wall electrode for metallurgical DC electric furnace.
ATE68301T1 (en) DEVICE FOR ADJUSTING THE FOCUS OF A CATHODE BEAM TUBE.
US4073640A (en) Method of melting slag
GB9825452D0 (en) Improved welding apparatus and method
CN114390956B (en) Arc welding control method and arc welding device
GB2061163A (en) Method of and an apparatus for marking metal objects
GB2002276A (en) Welding at pressures greater than atmospheric pressures
KR200160785Y1 (en) Adjustment Tool for CO2 Arc Welding Torch
JPS57202974A (en) Controlling method for arc welding machine using consumable electrode
JPS57202982A (en) Welding method for narrow edge due to consumable electrode type gas shield arc
BG51191A1 (en) Method for arc welding
JPS5653876A (en) Flying start method of spot scarfer
Osipenko et al. Pulsating-Arc Welding in CO sub 2 Gas Utilizing Automatic Modification in the Slope of Voltage Vs. Current Curve for the Power Supply
JPS5414350A (en) Method and apparatus for compensating welding current in welder

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT DE ES FR GB IT

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT DE ES FR GB IT

17P Request for examination filed

Effective date: 19930914

17Q First examination report despatched

Effective date: 19950109

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT DE ES FR GB IT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRE;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.SCRIBED TIME-LIMIT

Effective date: 19950726

Ref country code: GB

Effective date: 19950726

REF Corresponds to:

Ref document number: 125664

Country of ref document: AT

Date of ref document: 19950815

Kind code of ref document: T

ET Fr: translation filed
REF Corresponds to:

Ref document number: 59203029

Country of ref document: DE

Date of ref document: 19950831

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19951106

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 19951120

Year of fee payment: 4

GBV Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed]

Effective date: 19950726

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20021029

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20021104

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20021111

Year of fee payment: 11

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20031116

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040602

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040730

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST