Patent US3240587A successfully refreshed from Google Patents.
US3240587A
Expired / Lapsed
US
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Method for injecting particulate coal into a blast furnace
Assignee: Honeywell International Inc
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Filing: 1962-12-21
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Granted: 1966-03-15
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Expires: 1982-12-21
Abstract
No abstract record available.
Inventors
- 👤 Lawrence D Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:31
CPC Classifications
C; C21; C21B; C21B5/00; C21B5/001; C21B5/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
IN THE METHOD OF SMELTING METALLURGICAL MATERIALS IN A BLAST FURNANCE WHEREIN THE METALLURGICAL MATERIALS, COKE AND FLUX ARE INTRODUCED INTO THE BLAST FURNACE AND THE RESULTANT CHARGE IS BLASTED WITH OXYGEN CONTAINING GAS INTRODUCED THROUGH THE TUYERES OF THE FURNACE, THE IMPROVEMENT WHICH COMPRISES INTRODUCING DRY HAMMERMILLED COAL PREHEATED TO A TEMPERATURE OF FROM 220* TO 600*F. THROUGH THE TUYERES OF THE BLAST FURNANCE AND THUS REDUCE THE AMOUNT OF COKE REQUIRED FOR SMELTING THE MEALLURGICAL MATERIALS, AT LEAST 20% OF SAID COAL BEING COMPRISED OF PARTICLES HAVING A PARTICLE SIZE OF OVER ONEEIGHTH UP TO ABOUT THREE-EIGHTS OF AN INCH.
Claim 2
Dependent Claim
102 words
IN THE METHOD OF SMELTING METALLURGICAL MATERIALS IN A BLAST FURNANCE WHEREIN THE METALLURGICAL MATERIALS, COKE AND FLUX ARE INTRODUCED INTO THE BLAST FURNACE AND THE RESULTANT CHARGE IS BLASTED WITH OXYGEN CONTAINING GAS INTRODUCED THROUGH THE TUYERES OF THE FURNACE, THE IMPROVEMENT WHICH COMPRISES INTRODUCING DRY HAMMERMILLED COAL PREHEATED TO A TEMPERATURE OF FROM 220* TO 600*F. THROUGH THE TUYERES OF THE BLAST FURNANCE AND THUS REDUCE THE AMOUNT OF COKE REQUIRED FOR SMELTING THE MEALLURGICAL MATERIALS, AT LEAST 20% OF SAID COAL BEING COMPRISED OF PARTICLES HAVING A PARTICLE SIZE OF OVER ONEEIGHTH UP TO ABOUT THREE-EIGHTS OF AN INCH.
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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) | 1969-03-14 | 1969-09-13 | 1970-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-14 | 1973-09-13 | 1974-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-14 | 1977-09-13 | 1978-03-15 | $7700.00 | Window Closed / Lapsed |