US3687284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reconditioning of suspensions used in the separation of minerals
Assignee: Stamicarbon BV
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Filing: 1970-10-27
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Granted: 1972-08-29
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Expires: 1990-10-27
Abstract
Abstract A method for reconditioning a diluted suspension of fine magnetizable particles for reuse in a specific gravity separation process wherein the diluted suspension is first separated from any particulate impurities, then diluted and fed to a cyclone densifier wherein the coarser magnetizable particles of the suspension are concentrated and the fine particles are separated and fed to a magnetic separator, the fine particles are then combined with the suspension of concentrated relatively coarser particles.
Inventors
- 👤 Jan N J Leeman
- 👤 Hubert H Dreissen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:08
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/08; B01; B01D; B01D35/00; B01D35/005; B03D1/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
40 words
A method according to claim 1, in which the first fraction is diluted prior to its introduction into the cyclone densifier to such an extent that the volume of the solids in the suspension varies from 5 to 20 percent.
Claim 2
Dependent Claim
24 words
A method according to claim 1, which comprises clarifying the second fraction and diluting the first fraction with part of said clarified second fraction.
Claim 3
Dependent Claim
33 words
A method according to claim 1, in which the combined fraction is recirculated to the diluted first fraction when the concentration of the infeed of the cyclone densifier falls below a predetermined value.
Claim 4
Dependent Claim
22 words
A method according to claim 1, in which the grain size of the magnetizable particles is substantially smaller than 60 Mu .
Claim 5
Dependent Claim
16 words
A method according to claim 1, in which atomized ferrosilicon is used as the suspension material.
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) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |