Patent US3608880A successfully refreshed from Google Patents.
US3608880A
Expired / Lapsed
US
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Blast feed device for a steel converter
Assignee: WENDEL SIDELOR AND D Cie
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Filing: 1970-01-23
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Granted: 1971-09-28
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Expires: 1990-01-23
Abstract
Abstract This device for supplying wind to be blown through the bottom of a steel converter, adapted to ensure a double yet separate feed to the blast tuyeres and wherein said tuyeres comprise for each blowhole a pair of concentric metal tubes adapted to be supplied with different gaseous substances, such as a combustive agent, for instance pure oxygen, and a cooling gas such as water steam or carbon dioxide gas, said device comprising essentially a body constituting a two-compartment chamber, each compartment being adapted to supply a specific substance annularly to at least one injector having its head engaged in a fluidtight manner against the base of the particular one of the pair of tubes of each tuyeres which it is intended to supply with this gaseous substance.
Inventors
- 👤 Marcel Gombert
- 👤 Pierre Leroy
- 👤 Emile Sprunck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:33
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/28; C21C5/42; C21C5/46; C21C5/48
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
44 words
A device as set forth in claim 1, wherein each tuyere comprises a separate feed chamber having two compartments, said chamber being preferably cylindrical, each compartment of said chamber being connected to the corresponding gas header through a flexible hose or a small-diameter tube.
Claim 2
Dependent Claim
80 words
A device as set forth in claim 1, wherein each row of tuyeres comprises a separate feed chamber having two compartments, said chamber being preferably of toroidal configuration and receiving therethrough, registering with each tuyere, the pair of injectors each connected to a separate compartment, and each one of said compartments is supplied with gaseous substance at one or a plurality of points of its circumference through any suitable means such as a flexible hose or a small diameter tube.
Claim 3
Dependent Claim
36 words
A device as set forth in claim 3, wherein the injector of each tuyere which feeds the central tube is closed at its base by a screw plug adapted to be unscrewed in case of need.
Claim 4
Dependent Claim
37 words
A device as set forth in claim 1, wherein the base of the tubes of said tuyeres has a frustoconical portion adapted to coact with a frustoconical portion provided on each one of the corresponding injector heads.
Claim 5
Dependent Claim
46 words
A device as set forth in claim 5, characterized in that the base of the tubes of said tuyeres is frustoconical and adapted to coact with a corresponding frustoconical portion provided on each one of the heads of the corresponding injectors for ensuring the necessary fluidtightness.
Claim 6
Dependent Claim
29 words
A device as set forth in claim 2, wherein said two-compartment chamber is welded to a sleeve inserted into a hole formed through the bottom plate of the converter.
Claim 7
Dependent Claim
28 words
A device as set forth in claim 7, wherein said sleeve comprises one or a plurality of ducts opening into the surrounding atmosphere and acting as leakage ducts.
Claim 8
Dependent Claim
40 words
A device as set forth in claim 3, characterized in that said chamber is welded directly to the underface of the bottom plate of the converter which is provided with leakage ducts opening to the outside beneath said bottom plate.
Claim 9
Dependent Claim
68 words
A device as set forth in claim 1, wherein said two-compartment chamber rigid with the pair of tube of the tuyeres is adapted to slide in a guiding cylindrical skirt rigidly secured to the bottom plate of the converter, the front face of said chamber bearing against a resilient member reacting against and/or into said bottom plate, its rear face being adapted to react against a locking system.
Claim 10
Dependent Claim
16 words
A device as set forth in claim 10, wherein said resilient member consists of spring means.
Claim 11
Dependent Claim
20 words
A device as set forth in claim 10, wherein said resilient member consists of a set of dished spring washers.
Claim 12
Dependent Claim
29 words
A device as set forth in claim 10, wherein said locking system consists of one or a plurality of transverse lockpins extending through slots formed in said guide skirt.
Claim 13
Dependent Claim
107 words
A device as set forth in claim 10, wherein said resilient member is so arranged that, in the absence of any tractive effort exerteD on the external tube in the direction of the bottom of said converter, said two-compartment chamber abuts against said locking system, without any other pressure than that resulting from its inherent weight, said resilient member being expanded completely in said position and the maximum tractive effort exerted in the direction of the bottom of said converter and to which the outer tube is normally subjected is inferior to the effort necessary for compressing home said resilient member against the bottom of the converter.
References Cited (Backward Citations)
US2562813A
Cited
US3397878A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |