Patent US3779534A successfully refreshed from Google Patents.
US3779534A
Expired / Lapsed
US
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Device for cooling a tuyere of a refining converter
Assignee: Creusot Loire SA
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Filing: 1972-05-15
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Granted: 1973-12-18
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Expires: 1992-05-15
Abstract
Abstract Means for cooling a tuyere of a refining converter having two separate feed systems, which comprises an axial circuit for the oxidizing gas and a peripheral circuit for the cooling agent, wherein a cooling liquid, such as water under pressure, carbon dioxide in the liquid state or a hydrocarbon-containing liquid is injected into the peripheral circuit in lieu of a cooling gas.
Inventors
- 👤 P Leroy
- 👤 E Sprunck
- 👤 M Gombert
- 👤 M Queuleu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:36
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/28; C21C5/42; C21C5/46; C21C5/48; C21C5/30; C21C5/34
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
112 words
A tuyere and means for cooling the same in a converter, said tuyere comprising: an inner tube providing an axial circuit means for the passage therethrough of an oxidizing gas; an outer tube concentrically positioned around said inner tube; and a plurality of point protrusions extending from one of said tubes into contact with the other of said tubes, said point protrusions providing means for centrally spacing said outer tube about said inner tube and forming an annular space therebetween, said annular space providing a peripheral circuit means for injecting a cooling agent into said converter peripherally of said oxidizing gas in a liquid state up to the top of said tuyere.
Claim 2
Dependent Claim
112 words
A tuyere and means for cooling the same in a converter, said tuyere comprising: an inner tube providing an axial circuit means for the passage therethrough of an oxidizing gas; an outer tube concentrically positioned around said inner tube; and a plurality of point protrusions extending from one of said tubes into contact with the other of said tubes, said point protrusions providing means for centrally spacing said outer tube about said inner tube and forming an annular space therebetween, said annular space providing a peripheral circuit means for injecting a cooling agent into said converter peripherally of said oxidizing gas in a liquid state up to the top of said tuyere.
Claim 3
Dependent Claim
19 words
A device as claimed in claim 1, wherein said point protrusions are located at different heights along said tuyere.
Claim 4
Dependent Claim
21 words
A device as claimed in claim 1, wherein said point protrusions extend outwardly from the outer surface of said inner tube.
Claim 5
Dependent Claim
21 words
A device as claimed in claim 1, wherein said point protrusions extend inwardly from the inner surface of said outer tube.
References Cited (Backward Citations)
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US3330645A
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US3321139A
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US3521871A
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US3567202A
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US3706549A
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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) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |