US3768543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electro-slag furnace for producing continuous ingot
Assignee: Individual
•
Filing: 1971-06-15
•
Granted: 1973-10-30
•
Expires: 1991-06-15
Abstract
Abstract An electro-slag furnace for producing a continuous metallic ingot comprises a housing having a bottom portion in which an electrode constituted of the forming ingot is shiftable. A further electrode is spaced above the ingot electrode and a cooling channel is provided to cool the slag in the furnace to form a slag crust on the wall of the channel. The depth of the bottom portion between the electrodes is determined as a function of the diameter of the channel such that the thickness of the crust layer on the channel wall relative to the length thereof between the electrodes is sufficient for preventing a shunting electric discharge between the channel wall and slag.
Inventors
- 👤 V Kolisnyk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:31
CPC Classifications
B; B22; B22D; B22D23/00; B22D23/06; B22D23/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
147 words
An electro-slag furnace comprising a chamber containing molten slag, means for introducing a metal charge into the molten slag, a first electrode fixed in the chamber, a second displaceable electrode spaced from the first electrode and constituted by solidified metal derived from said metal charge, means for applying electrical energy to said electrodes, cooling means for cooling the chamber between said electrodes for forming a slag crust which prevents short circuit between the second electrode and the chamber, said chamber comprising a housing provided with a bottom opening and a mold in extension of the opening, said second electrode being positioned in said mold, the electrical energy applied to the electrodes forming pools of said metal charge at the surfaces thereof, and means for maintaining the surface of the second electrode spaced from said bottom opening by a distance substantially less than the diameter of said opening.
Claim 2
Dependent Claim
147 words
An electro-slag furnace comprising a chamber containing molten slag, means for introducing a metal charge into the molten slag, a first electrode fixed in the chamber, a second displaceable electrode spaced from the first electrode and constituted by solidified metal derived from said metal charge, means for applying electrical energy to said electrodes, cooling means for cooling the chamber between said electrodes for forming a slag crust which prevents short circuit between the second electrode and the chamber, said chamber comprising a housing provided with a bottom opening and a mold in extension of the opening, said second electrode being positioned in said mold, the electrical energy applied to the electrodes forming pools of said metal charge at the surfaces thereof, and means for maintaining the surface of the second electrode spaced from said bottom opening by a distance substantially less than the diameter of said opening.
Claim 3
Dependent Claim
23 words
A furnace as claimed in claim 1 wherein said housing has a cross-section which is greater than the size of said bottom opening.
Claim 4
Dependent Claim
27 words
A furnace as claimed in claim 1 comprising further cooling means including a plurality of axially spaced coolant channels surrounding said housing bottom and said mold respectively.
Claim 5
Dependent Claim
145 words
An electro-slag furnace comprising a chamber containing molten slag, means for introducing a metal charge into the molten slag, a first electrode fixed in the chamber, a second displaceable electrode spaced from the first electrode and constituted by solidified metal derived from said metal charge, means for applying electrical energy to said electrodes, cooling means for cooling the chamber between said electrodes for forming a slag crust which prevents short circuit between said molten slag and the chamber, said chamber comprising a housing provided with a bottom opening and a mold below the opening in extension thereof, said second electrode being positioned in said mold, the electrical energy applied to the electrodes forming pools of said metal charge at the surfaces thereof, the distance between the surface of said second electrode and said bottom opening being no more than one-tenth the diameter of said opening.
Claim 6
Dependent Claim
145 words
An electro-slag furnace comprising a chamber containing molten slag, means for introducing a metal charge into the molten slag, a first electrode fixed in the chamber, a second displaceable electrode spaced from the first electrode and constituted by solidified metal derived from said metal charge, means for applying electrical energy to said electrodes, cooling means for cooling the chamber between said electrodes for forming a slag crust which prevents short circuit between said molten slag and the chamber, said chamber comprising a housing provided with a bottom opening and a mold below the opening in extension thereof, said second electrode being positioned in said mold, the electrical energy applied to the electrodes forming pools of said metal charge at the surfaces thereof, the distance between the surface of said second electrode and said bottom opening being no more than one-tenth the diameter of said opening.
Claim 7
Dependent Claim
150 words
An electro-slag furnace comprising a chamber containing molten slag, means for introducing a metal charge into the molten slag, a first electrode fixed in the chamber, a second displaceable electrode spaced from the first electrode and constituted by solidified metal derived from said metal charge, means for applying electrical energy to said electrodes, cooling means for cooling the chamber between said electrodes for forming a slag crust which prevents short circuits between said molten slag and the chamber, said chamber comprising a housing provided with a bottom opening and a mold below the opening on extension thereof, said second electrode being positioned in said mold, the electrical energy applied to the electrodes forming pools of said metal charge at the surfaces thereof, the height of said housing disposed between the first and the second electrodes being about ten times smaller than the distance between the opposite sides of said opening.
Claim 8
Dependent Claim
150 words
An electro-slag furnace comprising a chamber containing molten slag, means for introducing a metal charge into the molten slag, a first electrode fixed in the chamber, a second displaceable electrode spaced from the first electrode and constituted by solidified metal derived from said metal charge, means for applying electrical energy to said electrodes, cooling means for cooling the chamber between said electrodes for forming a slag crust which prevents short circuits between said molten slag and the chamber, said chamber comprising a housing provided with a bottom opening and a mold below the opening on extension thereof, said second electrode being positioned in said mold, the electrical energy applied to the electrodes forming pools of said metal charge at the surfaces thereof, the height of said housing disposed between the first and the second electrodes being about ten times smaller than the distance between the opposite sides of said opening.
References Cited (Backward Citations)
US2814658A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |