US3353952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for producing pellets of finely divided materials
Assignee: FLSmidth and Co AS
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Filing: 1965-06-11
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Granted: 1967-11-21
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Expires: 1985-06-11
Abstract
No abstract record available.
Inventors
- 👤 Hansen Eyvind Kjellerup
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:09
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/14; C22B1/24; C22B1/2413
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
136 words
A METHOD OF PRODUCING HARD PELLETS OF A FINELY DIVIDED MATERIAL SUITABLE FOR CHARGING INTO A SMELTING FURNACE WHICH COMPRISES TUMBLING RAW PELLETS IN A MIXTURE WITH A SUFFICIENT QUANTITY OF FINELY DIVIDED MATERIAL THAT THE FINELY DIVIDED MATERIAL CUSHIONS THE RAW PELLET, AND PROTECTS THEM AGAINST DAMAGE RESULTING FROM IMPACT AGAINST ONE ANOTHER, ADVANCING THE TUMBLING MIXTURE ALONG A PATH, FLOWING GASES OF COMBUSTION OF BURNING FUEL COUNTERCURRENT TO THE ADVANCING MIXTURE TO PREHEAT AND PARTIALLY HARDEN THE RAW PELLETS WITHOUT RAPID PREHEATING TO THE EVENT THAT THEY CAN BE ADVANCED AND TUMBLED ALONE WITHOUT BREAKING FROM TUMBLING, SEPARATING THE FINELY DIVIDED MATERIAL FROM THE PREHEATED PELLETS, CONTINUING THE TUMBLING AND ADVACE OF THE PREHEATED PELLETS IN A DIRECTION COUNTERCURRENT TO THE GASES OF COMBUSTION FOR A SUFFICIENT TIME TO HEAT HARDEN THE ADVANCING PELLETS.
Claim 2
Independent Claim
136 words
A METHOD OF PRODUCING HARD PELLETS OF A FINELY DIVIDED MATERIAL SUITABLE FOR CHARGING INTO A SMELTING FURNACE WHICH COMPRISES TUMBLING RAW PELLETS IN A MIXTURE WITH A SUFFICIENT QUANTITY OF FINELY DIVIDED MATERIAL THAT THE FINELY DIVIDED MATERIAL CUSHIONS THE RAW PELLET, AND PROTECTS THEM AGAINST DAMAGE RESULTING FROM IMPACT AGAINST ONE ANOTHER, ADVANCING THE TUMBLING MIXTURE ALONG A PATH, FLOWING GASES OF COMBUSTION OF BURNING FUEL COUNTERCURRENT TO THE ADVANCING MIXTURE TO PREHEAT AND PARTIALLY HARDEN THE RAW PELLETS WITHOUT RAPID PREHEATING TO THE EVENT THAT THEY CAN BE ADVANCED AND TUMBLED ALONE WITHOUT BREAKING FROM TUMBLING, SEPARATING THE FINELY DIVIDED MATERIAL FROM THE PREHEATED PELLETS, CONTINUING THE TUMBLING AND ADVACE OF THE PREHEATED PELLETS IN A DIRECTION COUNTERCURRENT TO THE GASES OF COMBUSTION FOR A SUFFICIENT TIME TO HEAT HARDEN THE ADVANCING PELLETS.
Claim 3
Dependent Claim
147 words
IN A ROTARY KILN WHICH COMPRISES A GENERALLY CYLINDRICAL SHELL MOUNTED FOR ROTATION ON ITS LONGITUDNIAL AXIS, MEANS FOR INTRODUCING INTO THE SHELL AT ONE END A MIXTURE OF FINELY DIVIDED MATERIAL AND PELLETS OF THE MATERIAL THE MIXTURE ADVANCING THROUGH THE SHELL AS THE SHELL ROTATES, AND MEANS FOR BURNING FUEL WITHIN THE SHELL ADJACENT TO ITS OTHER END, THE GASES OF COMBUSTION TRAVELING THROUGH THE SHELL COUNTERCURRENT TO THE ADVANCING MIXTURE, THE COMBINATION OF A SCREEN OF LESS DIAMETER THAN THE SHELL MOUNTED INSIDE OF AND COAXIALLY WITH THE SHELL A SUBSTANTIAL DISTANCE FROM BOTH ENDS OF THE SHELL AND CIRCUMFERENTIALLY SPACED OPENINGS EXTENDING THROUGH THE SHELL WALL, THE CIRCUMFERENTIALLY SPACED OPENINGS THROUGH THE SHELL WAS BEING COVERED BY THE SCREEN AND THE SCREEN PASSING THE FINELY DIVIDED MATERIAL AND RETAINING THE PELLETS, AND MEANS FOR RECEIVING THE MATERIAL ISSUING THROUGH THE CIRCUMFERENTIALLY SPACED OPENINGS.
Claim 4
Dependent Claim
147 words
IN A ROTARY KILN WHICH COMPRISES A GENERALLY CYLINDRICAL SHELL MOUNTED FOR ROTATION ON ITS LONGITUDNIAL AXIS, MEANS FOR INTRODUCING INTO THE SHELL AT ONE END A MIXTURE OF FINELY DIVIDED MATERIAL AND PELLETS OF THE MATERIAL THE MIXTURE ADVANCING THROUGH THE SHELL AS THE SHELL ROTATES, AND MEANS FOR BURNING FUEL WITHIN THE SHELL ADJACENT TO ITS OTHER END, THE GASES OF COMBUSTION TRAVELING THROUGH THE SHELL COUNTERCURRENT TO THE ADVANCING MIXTURE, THE COMBINATION OF A SCREEN OF LESS DIAMETER THAN THE SHELL MOUNTED INSIDE OF AND COAXIALLY WITH THE SHELL A SUBSTANTIAL DISTANCE FROM BOTH ENDS OF THE SHELL AND CIRCUMFERENTIALLY SPACED OPENINGS EXTENDING THROUGH THE SHELL WALL, THE CIRCUMFERENTIALLY SPACED OPENINGS THROUGH THE SHELL WAS BEING COVERED BY THE SCREEN AND THE SCREEN PASSING THE FINELY DIVIDED MATERIAL AND RETAINING THE PELLETS, AND MEANS FOR RECEIVING THE MATERIAL ISSUING THROUGH THE CIRCUMFERENTIALLY SPACED OPENINGS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-20 | 1971-05-22 | 1971-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-20 | 1975-05-22 | 1975-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-20 | 1979-05-22 | 1979-11-21 | $7700.00 | Window Closed / Lapsed |