US4110222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for separating magnetizable particles from a fluid
Assignee: Imerys Minerals Ltd
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Filing: 1976-04-12
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Granted: 1978-08-29
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Expires: 1996-04-12
Abstract
Abstract The apparatus comprises a magnet for establishing a magnetic field in a first zone, and a separating chamber. The separating chamber is provided with an inlet and an outlet for fluid and contains a fluid-permeable packing of magnetizable material between the inlet and the outlet. One or more parts of the separating chamber consist of magnetic field concentrating means constituted by ferromagnetic material. This part (or each of these parts) would otherwise occupy a region of relatively low magnetic field intensity when the separating chamber is within the first zone and a magnetic field was established in the first zone by means of the magnet. The remainder of the separating chamber consists of substantially non-magnetizable material. Means are provided for moving the separating chamber into, and out of, the first zone and for passing fluid containing magnetizable particles through the separating chamber when within that zone so that magnetizable particles are magnetized and captured in the packing. Means are provided for removing the captured particles from the packing when the separating chamber is in a second zone remote from the first zone.
Inventors
- 👤 James H. P. Watson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:09
CPC Classifications
B; B03; B03C; B03C1/00; B03C1/02; B03C1/025; B03C1/027
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
203 words
Moving matrix apparatus for separating magnetisable particles from a fluid in which they are suspended, which apparatus comprises: (a) a magnet for establishing a magnetic field in a first zone remote from a second zone; (b) at least one elongate separating chamber having a fluid inlet and a fluid outlet therein, the separating chamber having at least portions thereof near each end each comprising a magnetic field concentrating element of ferromagnetic material; (c) a fluid permeable packing of magnetisable material disposed in the separating chamber between the inlet and outlet thereof; (d) means for moving the separating chamber including the field concentrating elements into, and out of, the first zone; (e) means for passing fluid having magnetisable particles suspended therein through the separating chamber through the inlet thereof, when it is positioned within the first zone and a magnetic field is established in the first zone, so that magnetisable particles are magnetised by the magnetic field and attracted to, and retained in, the packing, whilst the fluid passes through the packing and exits through the outlet, and (f) means for removing the magnetisable particles retained in the packing, when the separating chamber is positioned in the second zone remote from the first zone.
Claim 2
Dependent Claim
203 words
Moving matrix apparatus for separating magnetisable particles from a fluid in which they are suspended, which apparatus comprises: (a) a magnet for establishing a magnetic field in a first zone remote from a second zone; (b) at least one elongate separating chamber having a fluid inlet and a fluid outlet therein, the separating chamber having at least portions thereof near each end each comprising a magnetic field concentrating element of ferromagnetic material; (c) a fluid permeable packing of magnetisable material disposed in the separating chamber between the inlet and outlet thereof; (d) means for moving the separating chamber including the field concentrating elements into, and out of, the first zone; (e) means for passing fluid having magnetisable particles suspended therein through the separating chamber through the inlet thereof, when it is positioned within the first zone and a magnetic field is established in the first zone, so that magnetisable particles are magnetised by the magnetic field and attracted to, and retained in, the packing, whilst the fluid passes through the packing and exits through the outlet, and (f) means for removing the magnetisable particles retained in the packing, when the separating chamber is positioned in the second zone remote from the first zone.
Claim 3
Dependent Claim
23 words
Apparatus according to claim 1, wherein the magnetic field concentrating element comprises two parts which form the end walls of the separating chamber.
Claim 4
Dependent Claim
22 words
Apparatus according to claim 2, wherein the fluid inlet and the fluid outlet extend through at least one of the end walls.
Claim 5
Dependent Claim
36 words
Apparatus according to claim 3, wherein the fluid inlet is constituted by one or more apertures through one end wall, and the fluid outlet is constituted by one or more apertures through the other end wall.
Claim 6
Dependent Claim
18 words
Apparatus according to claim 2, wherein each end wall is constituted by a plate made of ferromagnetic material.
Claim 7
Dependent Claim
17 words
Apparatus according to claim 5, wherein the thickness of the plates is between 3 and 150 mm.
Claim 8
Dependent Claim
14 words
Apparatus according to claim 1, wherein the separating chamber is generally cylindrical in shape.
Claim 9
Dependent Claim
14 words
Apparatus according to claim 1, wherein the separating chamber is generally prismatic in shape.
Claim 10
Dependent Claim
25 words
Apparatus according to claim 1, wherein the ferromagnetic material constituting the field concentrating means has a coercivity less than 10 3 A m -1 .
Claim 11
Dependent Claim
26 words
Apparatus according to claim 1, wherein the ferromagnetic material constituting the field concentrating means has a maximum relative permeability greater than 10 5 (in S.I. units).
Claim 12
Dependent Claim
22 words
Apparatus according to claim 1 wherein the ferromagnetic material constituting the field concentrating means has a saturation polarisation greater than 0.5 Tesla.
Claim 13
Dependent Claim
21 words
Apparatus according to claim 1, wherein the ferromagetic material constituting the field concentrating means contains at least 96% iron by weight.
Claim 14
Dependent Claim
18 words
Apparatus according to claim 1, wherein the ferromagnetic material constituting the field concentrating means is a nickel-iron alloy.
Claim 15
Dependent Claim
18 words
Apparatus according to claim 1, wherein the ferromagnetic material constituting the field concentrating means is a cobalt-iron alloy.
Claim 16
Dependent Claim
27 words
Apparatus according to claim 1, wherein the means for removing the magnetisable particles from the packing includes flushing means for flushing a fluid through the separating chamber.
Claim 17
Dependent Claim
29 words
Apparatus according to claim 15, wherein the means for removing the magnetisable particles from the packing includes magnetic degaussing means for reducing the residual magnetism within the separating chamber.
Claim 18
Dependent Claim
12 words
Apparatus according to claim 1, wherein the magnet is a superconducting electromagnet.
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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) | 1981-08-28 | 1982-02-27 | 1982-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-08-28 | 1986-02-27 | 1986-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-08-28 | 1990-02-27 | 1990-08-29 | $7700.00 | Window Closed / Lapsed |