US3602435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blast device for steel converter
Assignee: Individual
•
Filing: 1970-02-05
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Granted: 1971-08-31
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Expires: 1990-02-05
Abstract
Abstract Device for supplying blast gas to the blowing orifices of the bottom of a steelwork converter, which comprises a plurality of header-forming tubes disposed either as concentric tores or in any other suitable manner, each header being adapted to supply blast gas to a number of bottom orifices, for example a row thereof, with self-stopping means for easily putting each tuyere out of service in case of abnormally rapid wear thereof.
Inventors
- 👤 Pierre Leroy
- 👤 Emile Sprunck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:37
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/28; C21C5/42; C21C5/46; C21C5/48
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
97 words
A device for supplying blast gas to the blowing orifices at the bottom of a steelwork converter having a base plate comprising a plurality of header tubes, each header tube having a plurality of bottom orifices, means supplying blast gas to a row of bottom orifices, each of said header tubes welded to said baseplate engaging directly a row of blowing orifices and receives therethrough, in alignment with each orifice, a movable nozzle equipped with a valve member, the axes of said nozzle and said valve member being aligned with the axis of the relevant blowing orifice.
Claim 2
Independent Claim
97 words
A device for supplying blast gas to the blowing orifices at the bottom of a steelwork converter having a base plate comprising a plurality of header tubes, each header tube having a plurality of bottom orifices, means supplying blast gas to a row of bottom orifices, each of said header tubes welded to said baseplate engaging directly a row of blowing orifices and receives therethrough, in alignment with each orifice, a movable nozzle equipped with a valve member, the axes of said nozzle and said valve member being aligned with the axis of the relevant blowing orifice.
Claim 3
Dependent Claim
74 words
A device as set forth in claim 1, wherein each blowing orifice formed through the converter bottom consists of a metal tube, for example a copper tube, each tube having a funnel-shaped lower end adapted to be soldered to the plate supporting the converter bottom, and said nozzle has a semispherical upper end adapted to engage in a fluidtight manner the inner wall of said funnel-shaped end by pressing same against said bottom plate.
Claim 4
Dependent Claim
53 words
A device as set forth in claim 1 wherein each hollow nozzle comprises, coaxially to its upper end, a cylindrical blowing orifice formed with an outflaring upper end to prevent the successive hammerings supported by the upper end of the nozzle from damaging the diameter of said cylindrical portion controlling the gas output.
Claim 5
Dependent Claim
53 words
A device as set forth in claim 2, wherein each hollow nozzle comprises, coaxially to its upper end, a cylindrical blowing orifice formed with an outflaring upper end to prevent the successive hammerings supported by the upper end of the nozzle from damaging the diameter of said cylindrical portion controlling the gas output.
Claim 6
Dependent Claim
61 words
A device as set forth in claim 1 wherein the inner cavity of the nozzle which supplies blast gas to said cylindrical orifice is adapted to communicate with the blast under pressure contained in the header through a number of ducts of which the total cross-sectional passage area is calculated with a view to avoid any limitation of the gas output.
Claim 7
Dependent Claim
121 words
A device as set forth in claim 2, wherein the inner cavity of the nozzle which supplies blast gas to said cylindrical orifices is adapted to communicate with the blast under pressure contained in the header through a number of ducts of which the total cross-sectional passage area is calculated with a view to avoid any limitation of the gas output. 7 A device as set forth in claim 3, wherein the inner cavity of said nozzle supplying said cylindrical orifice is adapted to communicate with the blast under pressure contained in said header by means of a number of ducts of which the total cross-sectional passage area is calculated with a view to avoid any limitation of the gas output.
Claim 8
Dependent Claim
74 words
A device as set forth in claim 1, wherein the valve member of said nozzle consists of a solid member disposed inside said nozzle and provided with a ball valve at its top, said ball valve being adapted to engage the valve-sear forming lower edge of said cylindrical orifice of said nozzle as a consequence of the movement of said valve member when it is desired to put the corresponding tuyere out of service.
Claim 9
Dependent Claim
21 words
A device as set forth in claim 8, wherein said valve member movement is obtained by screwing same in said nozzle.
Claim 10
Dependent Claim
75 words
A device as set forth in claim 1, wherein the base of the metal tube constituting each tuyere, comprises on an outer face means permitting the communication with a leakage duct formed in the bottom plate of the converter whereby, in case of blast leakage at the base of said funnel-shaped base, the leakage under pressure is adapted to be vented to the outside instead of against said plate and the bottom of the converter.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-30 | 1975-03-01 | 1975-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-30 | 1979-03-01 | 1979-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-30 | 1983-03-01 | 1983-08-31 | $7700.00 | Window Closed / Lapsed |