US3823073A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Calcining coke in vertical kiln
Assignee: Individual
•
Filing: 1972-01-26
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Granted: 1974-07-09
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Expires: 1992-01-26
Abstract
Abstract A NEW METHOD OF CALCINING COKE IN A VERTICAL KILN IN TWO ZONES TO SHORTEN THE KILN RESIDENCE TIME AND TO PROVIDE EFFICIENT HEAT TRANSFER TO THE COKE PARTICLES. GREEN COKE IS DRIED, PREHEATED AND FED TO A CHOKING ZONE OF A VERTICAL KLIN FOR CALCINING IN SUSPENSION WITH COUNTERCURRENT FLOW OF ASCEDING FLUE GAS, TEN FURTHER CALCINED IN A FREE ALL ZONE OF THE KILN BY CONTACT WITH ASCENDING COMBUSTION GAS. COKE IS RETURNED IN A RADIANT-HEAT-SOAKING ZONE BEFORE REMOVAL FOR COOLING. FINES ARE RECOVERED FOR CALCINING AND HEAT IN THE FLUE GAS IS RECOVERED AND ULTILIZED.
Inventors
- 👤 A Minkkinen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:18
CPC Classifications
C; C10; C10L; C10L9/00; C10L9/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-08 | 1978-01-07 | 1978-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-08 | 1982-01-07 | 1982-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-08 | 1986-01-07 | 1986-07-09 | $7700.00 | Window Closed / Lapsed |