US3610795A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for continuously melting of metal
Assignee: INTITUT DE RECH de la SIDERURG
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Filing: 1969-10-14
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Granted: 1971-10-05
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Expires: 1989-10-14
Abstract
Abstract Apparatus for continuously melting of metal including a first electric arc furnace into which the solid metal is continuously fed to be molten therein by electric arcs produced by a plurality of electrodes extending into the first furnace, and a second furnace connected by a passage to the first furnace so that molten metal may flow through the passage from the first into the second furnace. Provisions are made to prevent solidifying of the metal, heated in the first furnace to the temperature of the liquidus, in the passage.
Inventors
- 👤 Jacques Antoine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:14
CPC Classifications
F; F27; F27D; F27D11/00; F27D11/08; C; C21; C21C; C21C5/00; C21C5/52; C21C5/5252; F27D3/00; F27D3/18
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
40 words
An apparatus as defined in claim 1, wherein said first furnace is lined with refractory material, and wherein said passage means is at least in part formed from refractory material having a higher heat conductivity than that of the lining.
Claim 2
Dependent Claim
35 words
An apparatus as defined in claim 2, wherein said refractory material of said passage means is insulated from the refractory material of the lining and from the outer atmosphere by refractory material of low-heat conductivity.
Claim 3
Dependent Claim
70 words
An apparatus as defined in claim 1, wherein the opening of said passage is limited in an upward direction by a substantially vertical wall, the lower end portion of which is adapted to extend into the molten material flowing from the first into the second furnace, said vertical wall being formed from refractory material having a heat conductivity greater than the refractory material forming the lining of the first furnace.
Claim 4
Dependent Claim
54 words
An apparatus as defined in claim 1, and including means in said means for supplying electrical energy to said electrodes to unbalance the phases of the means for supplying electrical energy to said electrodes for thus increasing the electrical energy supplied to said one electrode as compared to that supplied to the other electrodes.
Claim 5
Dependent Claim
20 words
An apparatus as defined in claim 1 and including means for increasing the lack of electrical balance of the arrangement.
Claim 6
Independent Claim
100 words
A method for continuously melting of metal in an electric arc furnace into which a plurality of electrodes extend, said method comprising the steps of arranging the electrodes in the furnace and supplying electrical eneRgy to the electrodes in such a manner that one of the electrodes receives a greater amount of electrical energy than each of the other electrodes; continuously feeding metal to be melted in said furnace; continuously melting the metal by the arcs produced between the electrodes and the metal; and discharging the molten metal from the furnace at a point closely adjacent to said one electrode.
Claim 7
Dependent Claim
65 words
A method as defined in claim 7, wherein said electrodes are supplied by conductors with electrical energy and including the step of varying the impedance of the conductors in such a manner so as to increase the lack of balance in the system supplying the electrodes with electrical energy and the electrical energy supplied to said one electrode and therewith the heat radiation emitted therefrom.
References Cited (Backward Citations)
US848422A
Cited
US1339428A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-04 | 1975-04-05 | 1975-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-04 | 1979-04-05 | 1979-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-04 | 1983-04-05 | 1983-10-05 | $7700.00 | Window Closed / Lapsed |