EP 0184140 A3 19870408 - ARC FURNACE

Title (en)

ARC FURNACE

Publication

EP 0184140 A3 19870408 (DE)

Application

EP 85115111 A 19851128

Priority

DE 3443574 A 19841129
DE 3516940 A 19850510

Abstract (en)

[origin: ES8608766A1] In an electric arc furnace having a fluid-cooled electrode support arm which is provided with an electrode holding means, the outside of the electrode support arm is plated with cooper and the electrode holding means is electrically insulated with respect to the support arm, by way of which the electrode current is carried to a contact jaw that bears against the electrode. In an electric arc furnace with for example three parallel electrode support arms the electrode current is taken partly by way of a heavy-current tube and partly by way of the electrode support arm in order to balance the different reactance in relation to the two other electrode support arms. In order to eliminate reactance asymmetry, a reactance loop is provided in at least one heavy-current conductor between the transformer of the electric arc furnace and the associated electrode support arm.

IPC 1-7

H05B 7/103; H05B 7/11

IPC 8 full level

H05B 7/103 (2006.01); H05B 7/11 (2006.01)

CPC (source: EP US)

H05B 7/103 (2013.01 - EP US); H05B 7/11 (2013.01 - EP US)

Citation (search report)

[A] US 3433878 A 19690318 - SUNDBERG YNGVE, et al
[A] FR 601033 A 19260220 - ELECTRO METALLURG DE MONTRICHE
[A] EP 0080954 A1 19830608 - CLECIM SA [FR]
[A] EP 0122120 A2 19841017 - BRITISH STEEL CORP [GB]
[A] DE 1204321 B 19651104 - LICENTIA GMBH
[A] DE 629611 C 19360508 - SIEMENS AG
[A] FR 2542962 A1 19840921 - NPP ELEKTROTERMIA [BG]
[A] DE 2332004 A1 19750123 - SIGRI ELEKTROGRAPHIT GMBH
[A] GB 624657 A 19490614 - DELAWARE ENGINEERING CORP

Designated contracting state (EPC)

AT BE CH DE FR GB LI LU SE

DOCDB simple family (publication)

EP 0184140 A2 19860611; EP 0184140 A3 19870408; EP 0184140 B1 19891115; EP 0184140 B2 19940504; DE 3574323 D1 19891221; ES 549398 A0 19860716; ES 8608766 A1 19860716; US 4682341 A 19870721

DOCDB simple family (application)

EP 85115111 A 19851128; DE 3574323 T 19851128; ES 549398 A 19851128; US 80225285 A 19851127