AU1675201A - Low intensity magnetic separator - Google Patents
Low intensity magnetic separator Download PDFInfo
- Publication number
- AU1675201A AU1675201A AU16752/01A AU1675201A AU1675201A AU 1675201 A AU1675201 A AU 1675201A AU 16752/01 A AU16752/01 A AU 16752/01A AU 1675201 A AU1675201 A AU 1675201A AU 1675201 A AU1675201 A AU 1675201A
- Authority
- AU
- Australia
- Prior art keywords
- tunnel
- separator
- carrier
- magnetic
- particles
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000006148 magnetic separator Substances 0.000 title claims description 8
- 239000002245 particle Substances 0.000 claims description 20
- 238000000926 separation method Methods 0.000 claims description 10
- 238000004140 cleaning Methods 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 3
- 125000006850 spacer group Chemical group 0.000 claims description 2
- 230000002844 continuous effect Effects 0.000 claims 1
- 239000000463 material Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 239000006249 magnetic particle Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 238000011001 backwashing Methods 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000007885 magnetic separation Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000003716 rejuvenation Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
- B03C1/025—High gradient magnetic separators
- B03C1/027—High gradient magnetic separators with reciprocating canisters
Landscapes
- Filtering Of Dispersed Particles In Gases (AREA)
- Filtering Materials (AREA)
Description
AUSTRALIA
Patents Act 1990 COMPLETE SPECIFICATION STANDARD PATENT Applicant(s): OUTOKUI4PU OYJ Invention Title: LOW INTENSITY MAGNETIC SEPARATOR The following statement is a full description of this invention, including the best method of performing it known to me/us: LOW INTENSITY MAGNETIC SEPARATOR This invention relates to the field of magnetic separation and more particularly, it relates to an apparatus for the separation of magnetizable particles from a mass of ore particles by the use of a low intensity magnetic field.
Super-conducting magnets are well-known in the prior art, and there is some limited amount of prior art, as indicated in U.S. Patent No. 5,743,410, issued April 28, 1998, that describes the use of such super-conducting magnets in separation techniques.
This invention provides an apparatus and a method for separating magnetic particles from a liquid or gaseous stream of particles passing through an enclosed housing wherein two opposed magnets, which might be permanent 15 magnets, electromagnets, or super-conducting magnets, which maintain a low .i intensity magnetic field across the stream of particles. The stream of particles to be separated passes through a series of filter elements as they pass into, through, and out of the magnetic field. At least two of these filter elements are arranged such that one is operational in actively collecting magnetic particles 20 while the other is being cleansed of magnetic particles, as by backwashing, and made ready to be operational again. The housing includes two steel cover plates spaced apart and parallel to each other so as to allow the filter elements •to be moved into and out of a tunnel-like space between the plates. Magnetic power is produced across that tunnel space by magnets placed along the 25 tunnel on both sides thereof. The magnetic field strength of this separator is less or equal to 2 Tesla, and as such it is identified as a "low intensity" magnetic separator.
The novel features believed to be characteristic of this invention are set forth with particularity in the appended claims. The invention itself, however, both as to its organization and method of operation, together with further objects and 2 advantages thereof, may best be understood by reference to the following description taken in connection with the accompanying drawings in which: Fig. 1 is a schematic view in perspective of the separation apparatus of this invention which might be employed to separate magnetizable particles from a mass of magnetizable and nonmagnetizable particles; Fig. 2 is a side elevational vied of a separator of this invention; and Fig. 3 is a cross-sectional view taken at 3 3 of Fig. 2 showing the magnetic fields around the tunnel through the separator housing.
This invention deals with an apparatus and a method of using the apparatus to separate particles that are capable of being magnetized from a mass of particles in a continuously flowing liquid or gaseous stream. The magnetizable particles in the fluid stream are passed through a magnetic field where these particles are trapped by a filter medium while the nonmagnetized particles pass on through in the stream to an exit for discharge or for further treatment. When **:the filter medium is full of trapped material and begins to show signs of being clogged and resistant to the flow of the fluid stream there through, the clogged **filter is removed from the magnetic field and replaced by a clean filter medium and the separation process is resumed while the clogged filter is cleaned to 20 recover the magnetized particles and to prepare the filter for another operational period when called upon to do so. By appropriate scheduling the magnetic field and the equipment necessary to keep it in operation can produce S* an almost continuous processing of separating the mass of particles so as to .t recover the magnetizable portion thereof. This may require more than two filter 25 elements to be serially subjected to the magnetic field, if the turn-around time for cleaning a clogged filter is longer that the time it takes the process to fill and clog a clean filter element. It will become apparent from the following description that a train of filter elements separated from each other by appropriate spacer elements may be arranged so that the time for removing a clogged filter from the line and replacing it with a clean filter element can be reduced to an 3 acceptable minimum to maintain a substantially continuous separation process.
Fig. 1 of the attached drawings illustrates a typical apparatus for use in accomplishing the separation of this invention. The central housing 10 of this invention includes two parallel plates 13 of magnetizable or magnetically permeable material, such as mild steel. This arrangement form a tunnel 28 through the center to receive filter elemtn carrier 11 movable there through. In order to produce a magnetic excitation of the housing 10 the two side wall spaces immediately adjacent to the central tunnel are filled with magnets 12, i.e.
permanent magnets, electromagnets, or super-conducting magnets.
Filter element carrier 11 in its simplest form is a long rectangular parallelepiped of nonmagnetizable material, e.g. copper, bronze, glass, plastic, or the like, with an internal space to hold two filter elements 20A and 206, which might be fashioned with baffles and filled with steel wool so as to receive liquid or i* o o gaseous streams that will flow through, be dispersed throughout, and the solid magnetizable particles will be filtered therefrom. Each filter element 20A of is connected to its own inlet and outlet liquid or gas streams to be treated for the separation of magnetizable particles from the remainder of the streams.
Inlet stream 21B, when filter 20B is located within tunnel 28, brings untreated material into element 20B and it eventually turns around at 23 and flows outwardly at 22B. Similarly, inlet stream 21A brings untreated material into element 20A and it turns around at 24 and flow outwardly at 22A. Thus, the 25 actual filtering operation functions only when respective element 20A or 20B is in the operative position of housing 10 to apply its full magnetic field on the passing stream, 21A or 21 B. That position is shown in Fig. 1 for element The inoperative position of element 20B in Fig. 1 is for the cleaning operation to be applied to element 4 Fig. 2 shows a side elevational view of the separator of this invention. Separator housing 10 includes a tunnel 28 between cover plates 13 in which filter carrier element 11 moves reciprocally right or left to put a filter element 20A or in the field of the magnets in housing 10 to effect a separation of magnetizable material from nonmagnetizable material. Separating canister 25 separates the filtering operation on element 20A from that of element 20B. Dummy canisters 26A and 26B merely separate filter elements 20A and 20B from any other items that may be in carrier 11 as it is moved to place filter elements 20A or in or out of the magnetic field in housing 10. They also aid the smooth movement of the entire carrier 11. The movement of carrier 11 reciprocally right of left may be controlled by any type of linear actuator 27. Raw material for separation is provided by stream 21A into element 20A while it is in position in the magnetic field in housing 10. The other filter element 20B is outside of the magnetic field and available for cleaning and rejuvenation so as to be available 15 for reuse when needed and when element 20A is ready for cleaning. It is to be .o understood that linear actuator 27 for moving carrier 11 may be used in the '9006 separator illustrated in Fig. 1, and in addition, may alternatively be used to 0: move housing 10 which would be highly unlikely with the separator of U.S.
SPatent No. 5,743,410.
Fig. 3 shows a cross-section of the magnetic field in housing 10. Tunnel 28 is the guideway for containing carrier 11 as it relatively moves reciprocally in the direction into and out from the surface of Fig. 3 between cover plates 13 above and below tunnel 28; and also between rows of magnets 12 on either side of 25 tunnel 28.
9 When permanent magnets 12 are used in one embodiment of this invention, the magnetic field strength between plates 13 is approximately 0.5 Tesla. When electromagnets of super-conductive magnets are employed between coverplates 13, in accord with other embodiments of the invention, the magnetic field strength is approximately 2 Tesla. The type of separator disclosed in U.S.
patent No. 5,743,410 relates more particularly to separators with field strengths above 5 Tesla and are considered to be high intensity in comparison to the low intensity type to which this invention applies.
While the invention has been described with respect to certain specific embodiments, it will be appreciated that many modifications and changes may be made by those skilled in the art without departing from the spirit of the invention. It is intended, therefore, by the appended claims to cover all such modifications and changes as fall within the true spirit and scope of the invention.
It is to be understood that, if any prior art publication is referred to herein, such reference does not constitute an admission that the publication forms a part of the common general knowledge in the art, in Australia or any other country.
9* 0 e.
9.
For the purposes of this specification it will be clearly :0009. understood that the word "comprising" means "including but :o:o not limited to", and that. the word "comprises" has a corresponding meaning.
000e0o
Claims (7)
1. A magnetic separator for separating magnetizable particles from a continu- ous stream of particles in a fluid carrier, said separator including a housing having a plurality of magnetic elements producing a magnetic field around a generally horizontal tunnel extending through said housing, a nonmagnetic carrier relatively movable reciprocally through said tunnel and transporting at least two spaced filter containers containing magnetically activated filtration media and operatively connected to said continuous stream of particles, said carrier being alternatively positionable in the magnetic field or operational separation in one container and out of the magnetic field for cleaning while said continuous stream of particles continues to operate with another filter container on said carrier.
2. The magnetic separator of Claim 1 wherein said housing is movable with respect to said carrier. I
3. The separator of Claim 1 wherein said carrier is movable with respect to said S• housing.
4. The separator of Claim 1 wherein said plurality magnetic elements include a side-by-side arrangement as of permanent magnets extending along each side of said tunnel and extending generally the entire length of said tunnel.
5. The separator of Claim 1 wherein said carrier includes a centrally located spacer between said at least two spaced filter elements.
6. The magnetic separator of Claim 1 wherein said magnetic elements include a side-by-side arrangement of electromagnetic coils extending along each side of said tunnel and extending generally the entire length of said tunnel.
7. The magnetic separator of Claim 1 wherein said magnetic elements include a side-by-side arrangement of super-conducting magnets extending along each side of said tunnel and extending generally the entire length of said tunnel. Dated this 31st day of January 2001 OUTOKUMPU OYJ By their Patent Attorneys GRIFFITH HACK Fellows Institute of Patent and Trade Mark Attorneys of Australia Se
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US51158600A | 2000-02-23 | 2000-02-23 | |
US09/511586 | 2000-02-23 |
Publications (2)
Publication Number | Publication Date |
---|---|
AU1675201A true AU1675201A (en) | 2001-08-30 |
AU780530B2 AU780530B2 (en) | 2005-03-24 |
Family
ID=24035540
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AU16752/01A Ceased AU780530B2 (en) | 2000-02-23 | 2001-01-31 | Low intensity magnetic separator |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1127622A3 (en) |
AU (1) | AU780530B2 (en) |
BR (1) | BR0100753A (en) |
ZA (1) | ZA200101210B (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018024819A1 (en) * | 2016-08-05 | 2018-02-08 | Haute Ecole D'ingenierie Et De Gestion Du Canton De Vaud (Heig-Vd) | Device for removing particles from a material in movement |
CN113953085B (en) * | 2021-12-22 | 2022-05-17 | 潍坊新力超导磁电科技有限公司 | Sorting method of low-temperature superconducting magnetic separator |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB9309446D0 (en) * | 1993-05-07 | 1993-06-23 | Carpco Sms Ltd | Improvements in and relating to super-conducting magnets |
EP0920916A1 (en) * | 1997-12-04 | 1999-06-09 | Forschungszentrum Karlsruhe GmbH | High gradient magnetic separator |
-
2001
- 2001-01-31 AU AU16752/01A patent/AU780530B2/en not_active Ceased
- 2001-02-13 ZA ZA200101210A patent/ZA200101210B/en unknown
- 2001-02-22 BR BR0100753A patent/BR0100753A/en not_active IP Right Cessation
- 2001-02-23 EP EP01104607A patent/EP1127622A3/en not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
AU780530B2 (en) | 2005-03-24 |
EP1127622A3 (en) | 2002-07-10 |
EP1127622A2 (en) | 2001-08-29 |
BR0100753A (en) | 2001-11-06 |
ZA200101210B (en) | 2001-08-16 |
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