Refining of metals
Abstract
Abstract THE INVENTION IS FOR THE REFINING OF METALS AND COMPRISES SUBJECTING A MELT OF THE METAL TO AN OXYGEN TREATMENT WITHIN A REFINING VESSEL BY INJECTING INTO THE VESSEL A FLAME FED BY STREAMS OF OXYGEN AND LIQUID CARBONACEOUS FUEL WHEREIN PARTICLES OF SOLIDS MATERIAL ARE ENTRAINED WITH THE STREAM OF LIQUID CARBONACEOUS FUEL SUPPLIED TO THE FLAME. THE INVENTION PARTICULARLY RELATES TO THE REFINING OF IRON TO STEEL. THE SOLIDS MATERIAL MAY BE LIME OR A MIXTURE OF LIME WITH OTHER MATERIALS SUCH AS CALCIUM CARBIDE, COAL AND FLUORSPAR. THE SOLIDS MATERIAL HAS A PARTICLE SIZE NOT MORE THAN 1/8 " AND PREFERABLY 1/16 " TO 200 B.S.S. MESH AND IS FORMED INTO A SLURRY WITH THE LIQUID FUEL.
Inventors
- 👤 Hugh Willmott Grenfell
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) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |