Patent US3032189A successfully refreshed from Google Patents.
US3032189A
Expired / Lapsed
US
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Beneficiation of phosphatic ores
Assignee: International Minerals and Chemical Corp
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Filing: 1958-11-17
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Granted: 1962-05-01
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Expires: 1978-11-17
Abstract
No abstract record available.
Inventors
- 👤 Howard W Adam
- 👤 Douglas H Fenske
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:20
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/02; B03D1/021; Y; Y10; Y10S; Y10S209/00; Y10S209/902
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
A METHOD OF BENEFICIATING PHOSPHATE ROCK CONTAINING SILICA, AND ALUMINUM AND IRON COMPOUNDS WHICH COMPRISES COMMINUTING THE ORE TO EFFECT SUBSTANTIAL LIBERATION OF PHOSPHATIC VALUES, SLURRYING THE COMMINUTED ORE WITH WATER, HYDROCLASSIFYING THE ORE TO SEPARATE COARSE SOLIDS FROM FINE SOLIDS, SAID COARSE SOLIDS HAVING A MINIMUM PARTICLE SIGE OF BETWEEN ABOUT 100 AND ABOUT 325 MESH, SUBJECTING SAID COARSE SOLIDS TO FROTH FLOTATION, RECOVERING A PHOSPHATE CONCENTRATE FROM WHICH A MAJOR PORTION OF THE SILICA IN SAID COMMINUTED ORE HAS BEEN REMOVED, HEATING SAID CONCENTRATE TO DRYNESS, SUBJECTING THE DRY CONCENTRATE TO A MAGNETIC FIELD HAVING AN INTENSITY IN EXCESS OF ABOUT 25,000 MAXWELLS PER SQUARE INCH, WHEREBY A MAGNETIC FRACTION CONTAINING A MAJOR PORTION OF THE COMPOUNDS OR IRON AND ALUMINUM IS SEPARATED FROM THE NON-MAGNETIC FRACTION, AND RECOVERING SAID NON-MAGNETIC FRACTION RICH IN PHOSPHATE VALUES AND LOW IN COMPOUNDS OF IRON AND ALUMINUM.
Claim 2
Independent Claim
146 words
A METHOD OF BENEFICIATING PHOSPHATE ROCK CONTAINING SILICA, AND ALUMINUM AND IRON COMPOUNDS WHICH COMPRISES COMMINUTING THE ORE TO EFFECT SUBSTANTIAL LIBERATION OF PHOSPHATIC VALUES, SLURRYING THE COMMINUTED ORE WITH WATER, HYDROCLASSIFYING THE ORE TO SEPARATE COARSE SOLIDS FROM FINE SOLIDS, SAID COARSE SOLIDS HAVING A MINIMUM PARTICLE SIGE OF BETWEEN ABOUT 100 AND ABOUT 325 MESH, SUBJECTING SAID COARSE SOLIDS TO FROTH FLOTATION, RECOVERING A PHOSPHATE CONCENTRATE FROM WHICH A MAJOR PORTION OF THE SILICA IN SAID COMMINUTED ORE HAS BEEN REMOVED, HEATING SAID CONCENTRATE TO DRYNESS, SUBJECTING THE DRY CONCENTRATE TO A MAGNETIC FIELD HAVING AN INTENSITY IN EXCESS OF ABOUT 25,000 MAXWELLS PER SQUARE INCH, WHEREBY A MAGNETIC FRACTION CONTAINING A MAJOR PORTION OF THE COMPOUNDS OR IRON AND ALUMINUM IS SEPARATED FROM THE NON-MAGNETIC FRACTION, AND RECOVERING SAID NON-MAGNETIC FRACTION RICH IN PHOSPHATE VALUES AND LOW IN COMPOUNDS OF IRON AND ALUMINUM.
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) | 1965-04-30 | 1965-10-30 | 1966-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-30 | 1969-10-30 | 1970-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-30 | 1973-10-30 | 1974-05-01 | $7700.00 | Window Closed / Lapsed |