Patent US3819087A successfully refreshed from Google Patents.
Patent US4122005A successfully refreshed from Google Patents.
US4122005A
Expired / Lapsed
US
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Magnetic separator
Assignee: Mineral Processing Dev and Innovation AB
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Filing: 1977-06-13
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Granted: 1978-10-24
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Expires: 1997-06-13
Abstract
Abstract A magnetic separator comprises a magnet and an iron cylinder rotatable in a gap in the magnet. The cylinder and the lower pole face of the magnet define a separator chamber. An aqueous suspension of magnetizable and non-magnetic particles is supplied to the separator chamber through channels extending through the magnet.
Inventors
- 👤 Knut Sven Erik Forssberg
- 👤 Karl Dieter Kopp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:43
CPC Classifications
B; B03; B03C; B03C1/00; B03C1/02; B03C1/10; B03C1/14
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
182 words
A magnetic separator comprising: an iron cylinder rotatable around a horizontal axis, means for rotating said cylinder, a magnet having a first pole face situated substantially below said cylinder, and a second pole face situated substantially above said cylinder, said first pole face and said cylinder defining a separator chamber, said separator chamber having a first opening where the surface of the cylinder enters the separator chamber, and a second opening where the surface of the cylinder leaves the separator chamber, channels for supplying a suspension of magnetizable and non-magnetic particles in a liquid to an intermediate zone of said separator chamber, said channels extending through said magnet, and said first pole face said first opening being situated lower than the second opening to facilitate a flow of said suspension countercurrent to the movement of the surface of said cylinder in at least a portion of said chamber, means adjacent said first opening for collecting the suspension depleted of magnetizable particles, and means adjacent said second opening for removing magnetizable particles from the surface of the cylinder and for collecting such particles.
Claim 2
Dependent Claim
182 words
A magnetic separator comprising: an iron cylinder rotatable around a horizontal axis, means for rotating said cylinder, a magnet having a first pole face situated substantially below said cylinder, and a second pole face situated substantially above said cylinder, said first pole face and said cylinder defining a separator chamber, said separator chamber having a first opening where the surface of the cylinder enters the separator chamber, and a second opening where the surface of the cylinder leaves the separator chamber, channels for supplying a suspension of magnetizable and non-magnetic particles in a liquid to an intermediate zone of said separator chamber, said channels extending through said magnet, and said first pole face said first opening being situated lower than the second opening to facilitate a flow of said suspension countercurrent to the movement of the surface of said cylinder in at least a portion of said chamber, means adjacent said first opening for collecting the suspension depleted of magnetizable particles, and means adjacent said second opening for removing magnetizable particles from the surface of the cylinder and for collecting such particles.
Claim 3
Dependent Claim
42 words
A magnetic separator as claimed in claim 1, wherein the channels are arranged to open out into the separator chamber at a point lying at a distance of 50-75% of the chamber length, calculated from the first opening to the second opening.
Claim 4
Dependent Claim
29 words
A magnetic separator as claimed in claim 1, wherein the magnet is arranged inclined to the vertical plane, so that the first opening is lower than the second opening.
Claim 5
Dependent Claim
58 words
A magnetic separator as claimed in claim 1 further including means for securing one of said pole faces to a support structure, and means for varying the orientation of said mounted pole face in the vertical and in the horizontal direction with respect to the axis of said cylinder to vary the cross-sectional shape of the separator chamber.
Claim 6
Dependent Claim
49 words
A magnetic separator as in claim 1 wherein the surface of each pole face substantially conforms to the surface of said cylinder and wherein one of said pole faces is non-symmetrically positioned with respect to the axis of said cylinder to provide a separator chamber with a varying width.
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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) | 1981-10-23 | 1982-04-24 | 1982-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-23 | 1986-04-24 | 1986-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-23 | 1990-04-24 | 1990-10-24 | $7700.00 | Window Closed / Lapsed |