US3615347A
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Method of maximizing power utilization in the electric arc production of aluminium-silicon alloys
Assignee: Reynolds Metals Co
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Filing: 1969-01-21
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Granted: 1971-10-26
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Expires: 1989-01-21
Abstract
Abstract This application discloses a novel method for preparing alloys of 3and silicon in an electric furnace from a feedstock containing oxides of the relevant metals, carbon, and a metallic component. In this method, to the feedstock, which contains an oxidic component and sufficient carbon to reduce the oxidic component, the oxidic component containing alumina and silica in a ratio to about 2.0 to 6.0 parts of A12O3/1 part SiO2, there is added a metallic silicon compound and the arc furnace is operated with at least one electrode having an arc voltage E and an amperage I, determined for the current flowing in the individual electrode, having a ratio of E3/I of about 2 to 10.
Inventors
- 👤 Walther Schmidt
- 👤 Hubert Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:49
CPC Classifications
C; C22; C22B; C22B21/00; C22B21/02; F; F27; F27D; F27D11/00; F27D11/08; H; H05; H05B; H05B3/00; H05B3/10; H05B3/12
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
60 words
A method according to claim 1 in which the metallic silicon component is selected from the group consisting of silicon, aluminum-silicon alloys of at least as much Si as corresponds to the eutectic composition, intermetallic compounds of Si and Al with at least one element selected from Fe, Mn, Cr and Ti, silicides of Ti and Ca and silicon carbide.
Claim 2
Dependent Claim
19 words
A method according to claim 2 in which the metallic silicon component contains at least about 50 percent silicon.
Claim 3
Dependent Claim
28 words
A method according to claim 1 in which the numerical value E3/I equals about 2 to 6 for alternating current and about 3 to 10 for direct current.
Claim 4
Dependent Claim
44 words
A method according to claim 1 in which the metallic component contains up to 50 percent intermetallic compounds of Si and Al with at least one element selected from Fe, Mn, Cr and Ti, and the numerical value for E3/I equals 2 to 10.
Claim 5
Dependent Claim
49 words
A method according to claim 1 in which the furnace is operated with at least one of the electrodes being of cylindrical shape and having a diameter in inches equaling E + or - 10 percent for alternating current and 0.88E + or - 10 percent for direct current.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |