US3849301A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic separator
Assignee: Readings of Lismore Pty Ltd
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Filing: 1972-12-07
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Granted: 1974-11-19
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Expires: 1992-12-07
Abstract
Abstract A wet magnetic separator having a rotor formed on its periphery with an annular through passage which is defined by annular walls and which is divided into channels by radially extending spacers of a magnetisable material, the rotor being surrounded by a number of pole pieces (successive ones of which being of opposite polarity) and the rotor being constructed in such manner that a magnetic field of maximum intensity is induced in the rotor spacers which are at any one time located intermediate successive pole pieces.
Inventors
- 👤 H Reading
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:16
CPC Classifications
B; B03; B03C; B03C1/00; B03C1/02; B03C1/025; B03C1/029; B03C1/03
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
256 words
A magnetic separator-comprising: a. a magnetically impermeable rotor mounted on a vertically oriented shaft and having at least one annular through passage constituting or formed on its periphery and defined by spacedapart walls, the walls being formed from a material having nonmagnetic characteristics, and the or each through passage being disposed about the axis of rotation of the rotor, b. a number of spacers of a magnetically permeable material extending in a radial direction between the walls of the or each passage, successive spacers, together with the passage walls, defining through channels into which magnetic particles in a fluid suspension may be fed to pass in a direction substantially parallel to the axis of the rotor, c. a number of magnetic pole pieces surrounding the rotor and having their magnetic axes disposed radially with respect to the rotor, successive ones of the pole pieces being of opposite polarity whereby a magnetic field of maximum intensity is induced in the rotor spacers intermediate successive ones of the pole pieces; d. means for feeding a composite containing magnetic particles in a fluid suspension into said channels adjacent successive ones of the pole pieces; e. means also adjacent successive ones of the pole pieces for delivering a washing fluid for washing magnetic particles from within the channels; f. means intermediate successive pole pieces for delivering a washing fluid to successive said channels, for washing nonmagnetic particles from within the channels, and g. separate means for collection of magnetic and non-magnetic particles which are passed or washing through the channels.
Claim 2
Dependent Claim
256 words
A magnetic separator-comprising: a. a magnetically impermeable rotor mounted on a vertically oriented shaft and having at least one annular through passage constituting or formed on its periphery and defined by spacedapart walls, the walls being formed from a material having nonmagnetic characteristics, and the or each through passage being disposed about the axis of rotation of the rotor, b. a number of spacers of a magnetically permeable material extending in a radial direction between the walls of the or each passage, successive spacers, together with the passage walls, defining through channels into which magnetic particles in a fluid suspension may be fed to pass in a direction substantially parallel to the axis of the rotor, c. a number of magnetic pole pieces surrounding the rotor and having their magnetic axes disposed radially with respect to the rotor, successive ones of the pole pieces being of opposite polarity whereby a magnetic field of maximum intensity is induced in the rotor spacers intermediate successive ones of the pole pieces; d. means for feeding a composite containing magnetic particles in a fluid suspension into said channels adjacent successive ones of the pole pieces; e. means also adjacent successive ones of the pole pieces for delivering a washing fluid for washing magnetic particles from within the channels; f. means intermediate successive pole pieces for delivering a washing fluid to successive said channels, for washing nonmagnetic particles from within the channels, and g. separate means for collection of magnetic and non-magnetic particles which are passed or washing through the channels.
Claim 3
Dependent Claim
32 words
A magnetic separator as claimed in claim 1 wherein the rotor is formed on its periphery with a single said through passage and wherein the spacers extend radially between the walls thereof.
Claim 4
Dependent Claim
32 words
A magnetic separator as claimed in claim 2 wherein the spacers are formed on their opposite (channel defining) faces with corrugations which extend in a direction between opposite ends of the rotor.
Claim 5
Dependent Claim
36 words
A magnetic separator as claimed in claim 2 wherein the spacers have a length approximately equal to the axial length of the rotor and the spacers are inclined in the direction of rotation of the rotor.
Claim 6
Dependent Claim
22 words
A magnetic separator as claimed in claim 2 wherein the through passage is concentric and parallel with the axis of the rotor.
Claim 7
Dependent Claim
28 words
A magnetic separator as claimed in claim 2 wherein the passage defining walls of the rotor are constituted by annular bands of a stainless steel having non-magnetic characteristics.
Claim 8
Dependent Claim
45 words
A magnetic separator as claimed in claim 2 wherein the means for feeding the composite into the rotor channels are located outside one end of the rotor and adjacent the trailing edge of the respective pole pieces in the direction of rotation of the rotor.
Claim 9
Dependent Claim
43 words
A magnetic separator as claimed in claim 2 wherein the means for delivering a washing fluid for washing magnetic particles from within the channels are located outside one end of the rotor and are aligned with the axis of the respective pole pieces.
Claim 10
Dependent Claim
173 words
A process for effecting separation of magnetic particles from a composite fluid suspension material comprising the steps of: passing the composite material having magnetic and nonmagnetic ingredients therein through an annular passage of a rotor rotating about a vertical axis having magnetically impermeable spaced-apart walls defining such annular passage, collecting the magnetic particles on the surfaces of a number of spaced magnetically permeable spacers which are disposed at regular circumferential intervals within said passage to define channels receiving a flow of such fluid suspension as it is directed substantially parallel to the axis of the rotor, imposing a magnetic force through a series of circumferentially spaced magnetic pole pieces surrounding said rotor to develop a magnetic field of maximum intensity in the rotor spacers intermediate successive ones of pole pieces, washing in the region of said successive pole pieces the magnetic particles from within the channels and which are adhered to said spacers, and separately washing in the region intermediate said successive pole pieces and collecting the non-magnetic particles from within said channel.
Claim 11
Dependent Claim
173 words
A process for effecting separation of magnetic particles from a composite fluid suspension material comprising the steps of: passing the composite material having magnetic and nonmagnetic ingredients therein through an annular passage of a rotor rotating about a vertical axis having magnetically impermeable spaced-apart walls defining such annular passage, collecting the magnetic particles on the surfaces of a number of spaced magnetically permeable spacers which are disposed at regular circumferential intervals within said passage to define channels receiving a flow of such fluid suspension as it is directed substantially parallel to the axis of the rotor, imposing a magnetic force through a series of circumferentially spaced magnetic pole pieces surrounding said rotor to develop a magnetic field of maximum intensity in the rotor spacers intermediate successive ones of pole pieces, washing in the region of said successive pole pieces the magnetic particles from within the channels and which are adhered to said spacers, and separately washing in the region intermediate said successive pole pieces and collecting the non-magnetic particles from within said channel.
Claim 12
Dependent Claim
24 words
The process in accordance with claim 9 including the step of separately collecting the magnetic and nonmagnetic particles which are washed through the channels.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-18 | 1978-05-20 | 1978-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-18 | 1982-05-20 | 1982-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-18 | 1986-05-20 | 1986-11-19 | $7700.00 | Window Closed / Lapsed |