Patent US3593976A successfully refreshed from Google Patents.
US3593976A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for carrying out spray steelmaking processes
Assignee: Voestalpine AG
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Filing: 1969-04-15
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Granted: 1971-07-20
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Expires: 1989-04-15
Abstract
Abstract A spray apparatus is provided comprising a collecting vessel having a vertical inlet passage through which a stream of pig iron is fed by a free fall and a multihole blow pipe arranged inclined towards the axis of said vertical inlet passage, pressurized refining gas being supplied through the outlets of said blow pipe, said outlets being arranged in V- or U-fashion so as to form a gas jet with a channel like cross section owing to which fact the swaying flow of the pig iron stream doe not impair the spraying effect as the pig iron stream is perfectly caught by the refining gas.
Inventors
- 👤 Alois Hager
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:30
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/56
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
19 words
Apparatus as set forth in claim 1, wherein said outlets are arranged in V shape on said blow pipe.
Claim 2
Dependent Claim
19 words
Apparatus as set forth in claim 1, wherein said outlets are arranged in U shape on said blow pipe.
Claim 3
Dependent Claim
20 words
An apparatus as set forth in claim 1 wherein a plurality of secondary outlets are provided in said nozzle plate.
Claim 4
Independent Claim
124 words
An apparatus for carrying out in a vessel spray steelmaking processes, in which liquid pig iron is sprayed and refined by an oxygen-containing gas, comprising a vertical inlet passage in said vessel through which a stream of pig iron is fed by a free fall, a blow pipe in said vessel for supplying pressurized refining gas, said blow pipe being inclined at an angle to the path of fall of said pig iron and having a plurality of nozzle outlets arranged in a manner to form a gas jet with a channellike cross section, and a supply duct, said duct being positioned in said vessel to supply pulverize admixtures to the gas jet between said stream of pig iron and said blowpipe nozzle outlets.
Claim 5
Dependent Claim
121 words
A spray steelmaking apparatus comprising in combination: a collecting vessel having a hearth-type bottom, substantially vertical sidewalls and a closed top, a vertical inlet passage arranged in the top of said vessel near its sidewall, means for supplying liquid pig iron by a free fall through said inlet passage, a supply duct for finely divided admixtures disposed between said inlet passage and said sidewall, a water-cooled blast tube extending through said vessel sidewall adjacent to said inlet passage and supply duct, means for supplying pressurized refining gas to said blast tube, said blast tube being closed by a nozzle plate having a plurality of main outlets spaced along an upwardly diverging contour so as to form a trough-shaped refining gas jet.
Claim 6
Dependent Claim
24 words
The apparatus set forth in claim 6 wherein a number of small secondary outlets are provided in said nozzle plate below said main outlets.
Claim 7
Dependent Claim
19 words
The apparatus set forth in claim 6 wherein said main outlets are arranged in V-shape on said nozzle plate.
Claim 8
Dependent Claim
19 words
The apparatus set forth in claim 6 wherein said main outlets are arranged in U-shape on said nozzle plate.
References Cited (Backward Citations)
US336439A
Cited
US1245328A
Cited
US2112557A
Cited
US2159433A
Cited
US2330038A
Cited
US2341704A
Cited
US2681255A
Cited
US2969282A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |