US3554521A
Expired / Lapsed
US
⏱️ 0.0 years remaining
The treating or refining of metal
Assignee: British Iron and Steel Research Association BISRA
•
Filing: 1967-05-22
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Granted: 1971-01-12
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Expires: 1987-05-22
Abstract
Abstract A method and apparatus for refining iron in which a stream of molten iron is shattered by oxidizing gas in a vessel from which gas is withdrawn to induce air into the vessel.
Inventors
- 👤 Malvern John Rhydderch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:14
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/56; C21C1/00; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
136 words
Apparatus for treating molten carbon-containing metal comprising a container having an outlet from which molten metal may be fed as a freely falling flow, a reaction vessel positioned below said container and comprising an upper hood through which the metal may pass and a lower receptacle, the hood having a downwardly facing rim which defines with an opposed upwardly facing rim of the receptacle a passage which places the interior of the vessel directly in communication with the ambient atmosphere, gas discharge means positioned within the vessel to emit a gas flow to shatter the metal flow, offtake means in communication with the interior of the vessel, and extractor means coupled to said offtake means for forcibly removing gas from said vessel into said offtake means and thereby drawing air into said vessel via said passage.
Claim 2
Dependent Claim
34 words
Apparatus according to claim 1 in which the gas discharge means comprises at least one gas discharge outlet which faces inwardly and downwardly to direct a stream of gas towards the metal flow path.
Claim 3
Dependent Claim
17 words
Apparatus according to claim 1 including a discharge device for introducing slag producing material into the vessel.
Claim 4
Dependent Claim
33 words
Apparatus according to claim 4 in which the discharge device is positioned to discharge slag producing material along a path passing between the path of the metal flow and the gas discharge means.
Claim 5
Dependent Claim
19 words
Apparatus according to claim 1 in which the vessel includes an inlet for feeding additives thereto during a run.
Claim 6
Dependent Claim
25 words
Apparatus as claimed in claim 1 in which said upper compartment comprises a hood and said hod and receiving compartment define said passage means therebetween.
Claim 7
Dependent Claim
34 words
Apparatus according to claim 1 in which the gas discharge means comprises at least one gas discharge outlet which faces inwardly and downwardly and which has a convergent/divergent character to accelerate the gas flow.
References Cited (Backward Citations)
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |