US3571475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroslag refining apparatus
Assignee: Individual
•
Filing: 1967-10-18
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Granted: 1971-03-16
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Expires: 1987-10-18
Abstract
Abstract High melting point solid metal is maintained immersed in an electrically conducting, electrolyzable slag and is melted to form and maintain a pool of molten metal under said slag. An auxiliary electrode is maintained immersed in said slag. Unidirectional electric current is conducted through said auxiliary electrode and through said slag to induce fusion electrolysis in said slag so as to control ionic chemical reactions in a predetermined polarity direction taking place in said slag.
Inventors
- 👤 Wolfgang Holzgruber
- 👤 Peter Machner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:57
CPC Classifications
C; C22; C22B; C22B9/00; C22B9/16; C22B9/18; F; F27; F27D; F27D11/00; F27D11/08
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
40 words
An electroslag refining apparatus as claimed in claim 1 wherein said direct current source comprises at least one rectifier means connected between two leads from said alternating current source respectively connected to said consumable electrode and to said bottom element.
Claim 2
Dependent Claim
32 words
An electroslag refining apparatus as claimed in claim 1 wherein said nonconsumable electrode is made of a material having a higher melting point than that of the metal of said consumable electrode.
Claim 3
Dependent Claim
37 words
An electroslag refining apparatus as claimed in claim 1 wherein said alternating current source comprises at least one single-phase transformer having at least one secondary winding which is connected between said consumable electrode and said bottom element.
Claim 4
Dependent Claim
41 words
An electroslag refining apparatus as claimed in claim 1 which further comprises at least one switch means operatively connected to said direct current source to control the Polarity of said nonconsumable electrode; and the metal of said consumable electrode is steel.
Claim 5
Dependent Claim
41 words
An electroslag refining apparatus as claimed in claim 1 which further comprises at least one variable resistor connected in series with said nonconsumable electrode and said direct current source to control the value of the current flowing to said nonconsumable electrode.
Claim 6
Dependent Claim
168 words
An electroslag refining apparatus as claimed in claim 1 wherein said consumable electrode comprises a plurality of metal consumable electrodes and said alternating current source comprises a polyphase transformer having a plurality of secondary phase windings, each of said secondary phase windings being connected at one terminal to one of said plurality of consumable electrodes and all of the other terminals of each said secondary windings being connected to said bottom element; and said direct current source being a plurality of rectifier means each connected in parallel respectively between said one terminal and said other terminals of the secondary windings and thereby constituting a plurality of direct current sources, there also being a plurality of nonconsumable electrodes and one pole of each direct current source is connected to the nonconsumable electrodes to maintain them at said second polarity, and the other pole of each direct current source is connected to each of said consumable electrodes and said bottom element so as to maintain them at said first polarity.
Claim 7
Dependent Claim
25 words
An electroslag refining apparatus as set forth in claim 7 wherein an additional rectifier means is connected between said bottom element and said nonconsumable electrodes.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-15 | 1974-09-14 | 1975-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-15 | 1978-09-14 | 1979-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-15 | 1982-09-14 | 1983-03-16 | $7700.00 | Window Closed / Lapsed |