CA2391385A1 - Method and apparatus to facilitate restriking in an arc-furnace - Google Patents

Method and apparatus to facilitate restriking in an arc-furnace Download PDF

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Publication number
CA2391385A1
CA2391385A1 CA002391385A CA2391385A CA2391385A1 CA 2391385 A1 CA2391385 A1 CA 2391385A1 CA 002391385 A CA002391385 A CA 002391385A CA 2391385 A CA2391385 A CA 2391385A CA 2391385 A1 CA2391385 A1 CA 2391385A1
Authority
CA
Canada
Prior art keywords
arc
electrode
furnace
power supply
large current
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
CA002391385A
Other languages
French (fr)
Other versions
CA2391385C (en
Inventor
Francois Beauregard
Bruno Francoeur
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.)
Hydro Quebec
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to CA002391385A priority Critical patent/CA2391385C/en
Priority claimed from PCT/CA2000/001367 external-priority patent/WO2001037619A1/en
Publication of CA2391385A1 publication Critical patent/CA2391385A1/en
Application granted granted Critical
Publication of CA2391385C publication Critical patent/CA2391385C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Furnace Details (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Discharge Heating (AREA)

Abstract

To re-ignite efficiently an arc-furnace arc extending between an electrode and a material to be melt, a second energy supply is provided to maintain a plasma link between the electrode and the melting material when the arc-furnace arc is interrupted.
The electrode is supplied by a large current power supply including a large current conductor having a self inductance and being connected to the electrode. The second energy supply is an electrical power supply wherein a high frequency bypass impedance is provided in a supply path to the large current conductor at a distance from a capacitive circuit to allow a high frequency resonant circuit to be formed by the conductor section between the capacitive circuit and the bypass impedance without adversely affecting the large current power supply of the arc furnace. The capacitive circuit comprises an HF power supply injected in resonance with the resonant circuit to build an oscillating voltage and use the oscillating voltage to inject an HF current between the electrode and the melting metal in order to maintain the plasma link.
CA002391385A 1999-11-16 2000-11-16 Method and apparatus to facilitate restriking in an arc-furnace Expired - Lifetime CA2391385C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA002391385A CA2391385C (en) 1999-11-16 2000-11-16 Method and apparatus to facilitate restriking in an arc-furnace

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
CAPCT/CA99/01091 1999-11-16
CA9901091 1999-11-16
US16640699P 1999-11-19 1999-11-19
US60/166,406 1999-11-19
PCT/CA2000/001367 WO2001037619A1 (en) 1999-11-16 2000-11-16 Method and apparatus to facilitate restriking in an arc-furnace
CA002391385A CA2391385C (en) 1999-11-16 2000-11-16 Method and apparatus to facilitate restriking in an arc-furnace

Publications (2)

Publication Number Publication Date
CA2391385A1 true CA2391385A1 (en) 2001-05-25
CA2391385C CA2391385C (en) 2009-06-09

Family

ID=27171635

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002391385A Expired - Lifetime CA2391385C (en) 1999-11-16 2000-11-16 Method and apparatus to facilitate restriking in an arc-furnace

Country Status (1)

Country Link
CA (1) CA2391385C (en)

Also Published As

Publication number Publication date
CA2391385C (en) 2009-06-09

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Effective date: 20201116