US3794218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for opening a sealing element, which cannot be actuated, of the bottom nozzle of a casting vessel
Assignee: SMS Concast AG
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Filing: 1972-09-25
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Granted: 1974-02-26
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Expires: 1992-09-25
Abstract
Abstract A method of and apparatus for opening a sealing element, which cannot be actuated, of the bottom nozzle of a casting vessel, especially during continuous casting, wherein the steel which issues is passed through an immersion tube into the next steel receiver. According to the invention an oxygen infeed or lead is introduced through the hollow compartment or cavity associated with the casting jet into the region of the sealing element, the casting vessel together with the immersion tube is brought into the casting position, after introducing the steel at the beginning of casting the sealing element is lanced or burned and the oxygen infeed or lead is removed through the steel which issues from the hollow compartment or cavity associated with the casting jet.
Inventors
- 👤 M Yanagida
- 👤 W Bruderer
- 👤 S Sakanoue
- 👤 H Nakagawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:02
CPC Classifications
B; B22; B22D; B22D11/00; B22D11/10; B22D41/00; B22D41/08; B22D41/14; B22D41/44; B22D41/46; B22D41/465
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
127 words
A method for opening a sealing element, of the bottom nozzle of a casting vessel, especially during continuous casting, wherein the molten metal which issues is passed as a casting jet through an immersion tube into the next molten metal receiver, comprising the steps of introducing an oxygen infeed through a cavity associated with the casting jet into the region of the sealing element, bringing the casting vessel together with the immersion tube into casting position, feeding oxygen through the oxygen infeed in order to burn through the sealing element after introducing molten metal into the casting vessel at the beginning of casting, and removing at least part of the oxygen infeed from the cavity associated with the casting jet by means of the issuing molten metal.
Claim 2
Independent Claim
127 words
A method for opening a sealing element, of the bottom nozzle of a casting vessel, especially during continuous casting, wherein the molten metal which issues is passed as a casting jet through an immersion tube into the next molten metal receiver, comprising the steps of introducing an oxygen infeed through a cavity associated with the casting jet into the region of the sealing element, bringing the casting vessel together with the immersion tube into casting position, feeding oxygen through the oxygen infeed in order to burn through the sealing element after introducing molten metal into the casting vessel at the beginning of casting, and removing at least part of the oxygen infeed from the cavity associated with the casting jet by means of the issuing molten metal.
Claim 3
Dependent Claim
68 words
The method as defined in claim 1, including the step of placing the immersion tube to dip beneath the surface of the molten metal bath of the next molten metal receiver, placing the oxygen infeed so that the latter enters the cavity associated with the casting jet from above the surface of the molten metal bath, and sealing the oxygen infeed following burning through of the sealing element.
Claim 4
Independent Claim
117 words
An apparatus for opening a sealing element of the bottom nozzle of a casting vessel, comprising a casting vessel provided with a bottom nozzle, an immersion tube provided for the casting vessel through which molten metal passes into a subsequent molten metal receiver, said immersion tube having a cavity for the passage of a casting jet, a sealing element provided for the bottom nozzle of the casting vessel, oxygen infeed means entering into said casting jet and passing to the region of the sealing element for the burning through of said sealing element, said oxygen infeed means at the region where it enters the casting jet comprises a material which can be fused by the casting jet.
Claim 5
Independent Claim
117 words
An apparatus for opening a sealing element of the bottom nozzle of a casting vessel, comprising a casting vessel provided with a bottom nozzle, an immersion tube provided for the casting vessel through which molten metal passes into a subsequent molten metal receiver, said immersion tube having a cavity for the passage of a casting jet, a sealing element provided for the bottom nozzle of the casting vessel, oxygen infeed means entering into said casting jet and passing to the region of the sealing element for the burning through of said sealing element, said oxygen infeed means at the region where it enters the casting jet comprises a material which can be fused by the casting jet.
Claim 6
Dependent Claim
41 words
The apparatus as defined in claim 3, wherein said oxygen infeed means comprises a flexed pipe system, said flexed pipe system having an end section leading through the cavity associated with the casting jet towards the region of the sealing element.
Claim 7
Dependent Claim
15 words
The apparatus as defined in claim 4, wherein said end sectIon is formed of steel.
Claim 8
Dependent Claim
26 words
The apparatus as defined in claim 4, wherein the material of said oxygen infeed means at the region where it enters the casting jet is aluminium.
Claim 9
Dependent Claim
43 words
The apparatus as defined in claim 3, wherein the bottom nozzle embodies a casting orifice, a ring member interposed between said casting orifice and the immersion tube, said oxygen infeed means extending through said ring member to the region of said sealing element.
Claim 10
Dependent Claim
24 words
The apparatus as defined in claim 3, wherein said oxygen infeed means passes through said immersion tube to the region of said sealing element.
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) | 1977-02-25 | 1977-08-27 | 1978-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-25 | 1981-08-27 | 1982-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-25 | 1985-08-27 | 1986-02-26 | $7700.00 | Window Closed / Lapsed |