Patent US3898078A successfully refreshed from Google Patents.
US3898078A
Expired / Lapsed
US
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Method and apparatus for injecting refining oxygen in steelmaking processes
Assignee: Jones and Laughlin Steel Inc
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Filing: 1973-03-29
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Granted: 1975-08-05
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Expires: 1993-03-29
Abstract
Abstract Method and apparatus for refining a molten bath of a steelmaking composition which includes the injection of an oxygen stream introduced beneath the surface of the bath through a nozzle. The oxygen stream is shrouded by hydrocarbon fluid which serves as a coolant for protecting the discharge end of the nozzle, and the oxygen stream is expanded adiabatically just prior to discharge into the molten bath.
Inventors
- 👤 Richard A Huber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:57
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/28; C21C5/30; C21C5/34; C21B; C21B7/00; C21B7/16; C21C5/04
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
61 words
IN A METHOD OF REFINING A MOLTEN BATH OF A STEELMAKING COMPOSITION, WHEREIN: A STREAM OF CONCENTRATED OXYGEN IS INTRODUCED THROUGH AN INJECTOR NOZZLE HAVING ITS DISCHARGE TERMINUS BENEATH THE SURFACE OF THE BATH, AND SAID STREAM OF OXYGEN IS SHROUDED BY HYDROCARBON FLUID, THE IMPROVEMENT WHICH COMPRISES: ADIABATICALLY EXPANDING SAID STREAM OF OXYGEN JUST PRIOR TO DISCHARGE INTO SAID BATH.
Claim 2
Dependent Claim
61 words
IN A METHOD OF REFINING A MOLTEN BATH OF A STEELMAKING COMPOSITION, WHEREIN: A STREAM OF CONCENTRATED OXYGEN IS INTRODUCED THROUGH AN INJECTOR NOZZLE HAVING ITS DISCHARGE TERMINUS BENEATH THE SURFACE OF THE BATH, AND SAID STREAM OF OXYGEN IS SHROUDED BY HYDROCARBON FLUID, THE IMPROVEMENT WHICH COMPRISES: ADIABATICALLY EXPANDING SAID STREAM OF OXYGEN JUST PRIOR TO DISCHARGE INTO SAID BATH.
Claim 3
Dependent Claim
44 words
The method as described in claim 1, which further comprises: delivering said hydrocarbon fluid in a plurality of streams through a plurality of exit passages having their exits terminating in discharge ports equally spaced about said discharge terminus to facilitate atomization of said fluid.
Claim 4
Dependent Claim
23 words
The method of claim 1, wherein: said oxygen and said hydrocarbon fluid are introduced through nozzle means suspended from above said molten bath.
Claim 5
Dependent Claim
19 words
The method as described in claim 2, wherein: said plurality of exit passages is in the form of helices.
Claim 6
Dependent Claim
34 words
The method as described in claim 4, wherein: said nozzle defines a venturi tube delivering said oxygen and said helices generally extend from a section corresponding to the vena contracta of the venturi tube.
Claim 7
Dependent Claim
14 words
The method as described in claim 4, wherein: said helices are generally at 15*.
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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) | 1978-08-04 | 1979-02-03 | 1979-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-04 | 1983-02-03 | 1983-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-04 | 1987-02-03 | 1987-08-05 | $7700.00 | Window Closed / Lapsed |