CA2391385A1 - Method and apparatus to facilitate restriking in an arc-furnace - Google Patents
Method and apparatus to facilitate restriking in an arc-furnace Download PDFInfo
- 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
Links
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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.
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.
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) |
-
2000
- 2000-11-16 CA CA002391385A patent/CA2391385C/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
CA2391385C (en) | 2009-06-09 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKEX | Expiry |
Effective date: 20201116 |