US3929627A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic beneficiation for magnesite ores
Assignee: Financial Mining - Industrial and Shipping Corp
•
Filing: 1974-12-06
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Granted: 1975-12-30
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Expires: 1994-12-06
Abstract
Abstract A process for the beneficiation of magnesite ores includes the selective enhancement of the magnetic properties of the gangue constituents so that said constituents can be easily separated by magnetic separators.
Inventors
- 👤 Antonios Frangiskos
- 👤 Theodor Gambopoulos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:18
CPC Classifications
B; B03; B03C; B03C1/00; B03C1/005; B03C1/01
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
152 words
A PROCESS FOR THE RECOVERY OF PURE MAGNESITE FROM MAGNESITE ORES CONTAINING MAGNESITE, SEPENTINE AND OTHER GANGUE MATERIAL, COMPRISING: CRUSHING A QUANTITY OF MAGNESITE ORE; CONDITIONING THE CRUSHED ORE IN AN AQUEOUS SUSPENSION CONTAINING BY VOLUME 1 PERCENT DISEL OIL AND 0.15 PERCENT OF A MIXTURE OF CATIONIC COLLECTORS COMPRISING QUATERNARY AMMONIUM CHLORIDES AND PRIMARY AMINES FOR ACTIVATING THE SURFACE OF THE SERPENTINE AND THE OTHER GANGUE MATERIAL; AGAIN CONDITIONING THE CRUSHED ORE IN A SUSPENSION OF A FINELY DIVIDED STRONGLY FERROMAGNETIC MATERIAL SO AS TO ACHIEVE SELECTIVE ABSORPTION ON THE SURFACE OF THE SERPENTINE AND THE OTHER GANGUE MATERIAL AS WELL AS ON THE STRONGLY SILICEOUS AND CARBONACEOUS PARTICLES OF THE ORE; AND REMOVING THE SERPENTINE AND THE OTHER GANGUE MATERIAL AS WELL AS THE STRONGLY SILICEOUS AND CARBONACEOUS PARTICLES OF THE ORE FROM THE REMAINDER OF THE ORE BY MEANS OF A MAGNETIC SEPARATOR TO OBTAIN A CONCENTRATE OF MAGNESITE.
Claim 2
Dependent Claim
152 words
A PROCESS FOR THE RECOVERY OF PURE MAGNESITE FROM MAGNESITE ORES CONTAINING MAGNESITE, SEPENTINE AND OTHER GANGUE MATERIAL, COMPRISING: CRUSHING A QUANTITY OF MAGNESITE ORE; CONDITIONING THE CRUSHED ORE IN AN AQUEOUS SUSPENSION CONTAINING BY VOLUME 1 PERCENT DISEL OIL AND 0.15 PERCENT OF A MIXTURE OF CATIONIC COLLECTORS COMPRISING QUATERNARY AMMONIUM CHLORIDES AND PRIMARY AMINES FOR ACTIVATING THE SURFACE OF THE SERPENTINE AND THE OTHER GANGUE MATERIAL; AGAIN CONDITIONING THE CRUSHED ORE IN A SUSPENSION OF A FINELY DIVIDED STRONGLY FERROMAGNETIC MATERIAL SO AS TO ACHIEVE SELECTIVE ABSORPTION ON THE SURFACE OF THE SERPENTINE AND THE OTHER GANGUE MATERIAL AS WELL AS ON THE STRONGLY SILICEOUS AND CARBONACEOUS PARTICLES OF THE ORE; AND REMOVING THE SERPENTINE AND THE OTHER GANGUE MATERIAL AS WELL AS THE STRONGLY SILICEOUS AND CARBONACEOUS PARTICLES OF THE ORE FROM THE REMAINDER OF THE ORE BY MEANS OF A MAGNETIC SEPARATOR TO OBTAIN A CONCENTRATE OF MAGNESITE.
Claim 3
Dependent Claim
47 words
The process according to claim 1, comprising the further step of first classifying the crushed magnesite ore into particle size fractions of less than 1 mm., 1 mm. to 15 mm. and greater than 15 mm., each of the fractions being separately subjected to the recovery process.
Claim 4
Dependent Claim
30 words
The process according to claim 1, comprising the further step of first subjecting the crushed magnesite ore to a mechanical pre-concentration process to further effect a concentrate of the magnesite.
Claim 5
Dependent Claim
24 words
The process according to claim 1, comprising the further step of repeating the entire beneficiation process on the concentrate obtained to improve its quality.
Claim 6
Dependent Claim
24 words
The process according to claim 3, comprising the further step of repeating the entire beneficiation process on the concentrate obtained to improve its quality.
References Cited (Backward Citations)
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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) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |