US3576207A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Formation of steel strip
Assignee: Steel Company of Wales Ltd
•
Filing: 1969-04-22
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Granted: 1971-04-27
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Expires: 1989-04-22
Abstract
Abstract The present disclosure relates to a process for the continuous casting of metal strip, which process comprises imparting an electrostatic charge of at least 80,000 volts to a stream of molten metal, passing the stream of metal through a nozzle into an inert atmosphere and allowing the stream leaving the nozzle to atomize to a fine spray, collecting the spray droplets on a cool receiving surface to form a layer of metal on said surface and continuously stripping the layer of metal from said surface.
Inventors
- 👤 Hugh Willmott Grenfell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:51
CPC Classifications
B; B22; B22D; B22D11/00; B22D11/06; B22D11/0611; C; C23; C23C; C23C4/00; C23C4/12; C23C4/123
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
12 words
A process as claimed in claim 1 wherein the metal is steel.
Claim 2
Dependent Claim
20 words
A process as claimed in claim 1 wherein the receiving surface is the cylindrical surface of a water cooled roll.
Claim 3
Dependent Claim
13 words
A process as claimed in claim 1 wherein the receiving surface is earthed.
Claim 4
Dependent Claim
32 words
A process as claimed in any one of the preceding claims wherein the inert atmosphere is a gas which will not react with or dissolve to an appreciable amount, in the metal.
Claim 5
Dependent Claim
18 words
A process as claimed in claim 5 wherein the inert atmosphere is argon, krypton or other inert gas.
Claim 6
Dependent Claim
26 words
A process as claimed in claim 1 wherein the stream of molten metal is tapped from a ladle or tundish which is insulated from its surrounDing.
Claim 7
Dependent Claim
26 words
A process as claimed in claim 7 wherein the melt contained therein is contacted with an electrode charged to a potential of at least 80,000 volts.
Claim 8
Dependent Claim
22 words
A process as claimed in claim 8 wherein the magnitude of the electrostatic charge is within the range 100,000 to 200,000 volts.
Claim 9
Dependent Claim
26 words
A process as claimed in claim 1 wherein the metal strip from the collecting surface is subsequently rolled to form a strip of the desired thickness.
Claim 10
Dependent Claim
46 words
A process as claimed in claim 1 for the production of steel strip wherein a tundish is provided with a tapping rod vertically disposed with respect to the bottom of the tundish and extending therethrough to terminate at a lower end in a downwardly extending nozzle.
Claim 11
Dependent Claim
31 words
A process as claimed in claim 11 wherein the tapping rod is provided with control means for controlling the flow of molten steel passing from the tundish and through the nozzle.
Claim 12
Dependent Claim
41 words
A process as claimed in claim 12 wherein the nozzle end of the tapping rod is disposed within a collecting chamber having an inert atmosphere of argon which is maintained in the collecting chamber under a pressure slightly greater than atmospheric.
Claim 13
Dependent Claim
68 words
A process as claimed in claim 13 wherein immediately below the nozzle there is disposed a rotatable water-cooled roll which is located within the bottom wall of the collecting chamber, glands being provided to permit rotation of the roll about its axis with respect to the chamber without substantial loss of argon so that part of the peripheral surface of the roll is disposed externally of the chamber.
Claim 14
Dependent Claim
33 words
A process as claimed in claim 14 wherein the tundish is periodically charged with molten steel and an electrode is inserted in the molten steel and maintained at a potential of 120,000 volts.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-26 | 1974-10-26 | 1975-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-26 | 1978-10-26 | 1979-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-26 | 1982-10-26 | 1983-04-27 | $7700.00 | Window Closed / Lapsed |