Patent US3300295A successfully refreshed from Google Patents.
US3300295A
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Method and apparatus for roasting ores
Assignee: Institut de Recherches de la Siderurgie Francaise IRSID
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Filing: 1964-05-11
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Granted: 1967-01-24
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Expires: 1984-05-11
Abstract
No abstract record available.
Inventors
- 👤 Boucraut Michel
- 👤 Toth Imre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:44
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/02; B; B01; B01J; B01J8/00; B01J8/18; B01J8/24; B01J8/26; C22B1/10; C22B1/14; Y; Y10; Y10S; Y10S423/00; Y10S423/09; Y10S423/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
171 words
IN A METHOD OF ROASTING PULVERULENT ORE, THE STEPS OF: ESTABLISHING AT LEAST A FIRST, A SECOND AND A THIRD BED OF PULVERULENT ORE SEPARATE FROM EACH OTHER; PROVIDING FOR SEPARATION BETWEEN SAID FIRST AND THIRD BED BY A PARTITION WALL THEREBETWEEN; INTRODUCING A CONTINUOUS STREAM OF HOT GAS SUCCESSIVELY INTO EACH OF SAID BEDS FOR FLUIDIZING AND HEATING THE PULVERULENT ORE IN SAID BEDS AND FOR CAUSING A FLOW OF FLUIDIZED PULVERULENT ORE AT LEAST IN SAID FIRST AND THIRD BED IN SUBSTANTIALLY HORIZONTAL DIRECTION ALONG SAID PARTITION WALL; CAUSING HEAT EXCHANGE BETWEEN SAID FIRST AND THIRD BEDS ACROSS SAID PARTITION WALL; PRODUCING SAID STREAM OF HOT GAS BY AT LEAST PARTIAL COMBUSTION OF A FUEL AT A PREDETERMINED POINT WITHIN THE SECOND ONE OF SAID BEDS; AND CAUSING SAID FLUIDIZED PULVERULENT ORE TO FLOW FROM SAID FIRST BED TO SAID SECOND BED AND FROM SAID SECOND BED TO SAID THIRD BED WHILE INTRODUCING RAW PULVERULENT ORE INTO SAID FIRST BED AND REMOVING ROASTED PULVERULENT ORE FROM SAID THIRD BED.
Claim 2
Dependent Claim
171 words
IN A METHOD OF ROASTING PULVERULENT ORE, THE STEPS OF: ESTABLISHING AT LEAST A FIRST, A SECOND AND A THIRD BED OF PULVERULENT ORE SEPARATE FROM EACH OTHER; PROVIDING FOR SEPARATION BETWEEN SAID FIRST AND THIRD BED BY A PARTITION WALL THEREBETWEEN; INTRODUCING A CONTINUOUS STREAM OF HOT GAS SUCCESSIVELY INTO EACH OF SAID BEDS FOR FLUIDIZING AND HEATING THE PULVERULENT ORE IN SAID BEDS AND FOR CAUSING A FLOW OF FLUIDIZED PULVERULENT ORE AT LEAST IN SAID FIRST AND THIRD BED IN SUBSTANTIALLY HORIZONTAL DIRECTION ALONG SAID PARTITION WALL; CAUSING HEAT EXCHANGE BETWEEN SAID FIRST AND THIRD BEDS ACROSS SAID PARTITION WALL; PRODUCING SAID STREAM OF HOT GAS BY AT LEAST PARTIAL COMBUSTION OF A FUEL AT A PREDETERMINED POINT WITHIN THE SECOND ONE OF SAID BEDS; AND CAUSING SAID FLUIDIZED PULVERULENT ORE TO FLOW FROM SAID FIRST BED TO SAID SECOND BED AND FROM SAID SECOND BED TO SAID THIRD BED WHILE INTRODUCING RAW PULVERULENT ORE INTO SAID FIRST BED AND REMOVING ROASTED PULVERULENT ORE FROM SAID THIRD BED.
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) | 1970-01-23 | 1970-07-25 | 1971-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-23 | 1974-07-25 | 1975-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-23 | 1978-07-25 | 1979-01-24 | $7700.00 | Window Closed / Lapsed |