Melting of iron
Abstract
Abstract A CUPOLA FURNACE FOR MELTING IRON IS PROVIDED WITH COMBUSTION CHAMBERS FOR NON-SOLID FUELS, E.G. GAS OIL OR GAS, TO BE BURNT WITH AIR ONLY, DISPOSED AROUND THE EXTERNAL WALL OF THE MELTING ZONE. THE COMBUSTED PRODUCTS OF THIS NON-SOLID FUEL ARE INJECTED INTO AN UPPER STRATUM OF A COKE BED, PROVIDED IN THE FURNACE, TO MAINTAIN THE COKE IN INCANDESCENT CONDITION AND PROVIDE AN INITIAL MELTING STAGE OF THE FURNACE. ADDITIONAL EXTERNAL HEATING MEANS IS ALSO SUPPLIED TO A LOWER STRATUM OF THE COKE BEDS, IN ORDEDR TO SUPERHEAT THE INITIALLY MELTED METAL. THIS ARRANGEMENT ENSURES EFFICIENT COMBUSTION OF THE FUEL AND OBVIATES THE NEED FOR USING OXYGEN OR OXYGEN-ENRICHED AIR FOR COMBUSTION IN THE INITIAL MELTING STAGE.
Inventors
- 👤 Humphrey James Leyshon
Bibliographic Details
Claims Analysis
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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) | 1975-11-07 | 1976-05-08 | 1976-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-07 | 1980-05-08 | 1980-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-07 | 1984-05-08 | 1984-11-07 | $7700.00 | Window Closed / Lapsed |