US3824516A - Electromagnetic material handling system utilizing offset pole spacing - Google Patents

Electromagnetic material handling system utilizing offset pole spacing Download PDF

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Publication number
US3824516A
US3824516A US00329587A US32958773A US3824516A US 3824516 A US3824516 A US 3824516A US 00329587 A US00329587 A US 00329587A US 32958773 A US32958773 A US 32958773A US 3824516 A US3824516 A US 3824516A
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row
poles
magnetic
pole
spaces
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S Benowitz
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Priority to US00329587A priority Critical patent/US3824516A/en
Priority to CA190,827A priority patent/CA994406A/en
Priority to AU65143/74A priority patent/AU6514374A/en
Priority to FR7403627A priority patent/FR2216024B1/fr
Priority to JP49014407A priority patent/JPS50138473A/ja
Priority to GB513974A priority patent/GB1459247A/en
Priority to DE19742405433 priority patent/DE2405433A1/de
Priority to IT20184/74A priority patent/IT1007241B/it
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    • 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
    • B03C1/23—Magnetic separation acting directly on the substance being separated with material carried by oscillating fields; with material carried by travelling fields, e.g. generated by stationary magnetic coils; Eddy-current separators, e.g. sliding ramp
    • B03C1/24—Magnetic separation acting directly on the substance being separated with material carried by oscillating fields; with material carried by travelling fields, e.g. generated by stationary magnetic coils; Eddy-current separators, e.g. sliding ramp with material carried by travelling fields
    • B03C1/253—Magnetic separation acting directly on the substance being separated with material carried by oscillating fields; with material carried by travelling fields, e.g. generated by stationary magnetic coils; Eddy-current separators, e.g. sliding ramp with material carried by travelling fields obtained by a linear motor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S241/00—Solid material comminution or disintegration
    • Y10S241/38—Solid waste disposal

Definitions

  • ABSTRACT A technique of moving electrically conductive nonmagnetic particles wherein a plurality of electromagnets are positioned on either side of an air gap with each electromagnet facing a non-magnetic space between electromagnets on the opposite side of the air gap.
  • the electromagnets are energized with polyphase current in a manner to generate a sweeping magnetic flux down the air gap for moving particles therealong.
  • Eddy currents generated by one magnetic field relative phase reacts with flux of another magnetic field relative phase to provide motion of the article.
  • Two specific utilizations of this technique are described; the separation of conductive non-magnetic particles from waste material and the movement of aluminum can lids.
  • Non-ferrous metals include valuable aluminum and copper. Manual separation is possible but this is tedious and expensive. A flotation process is available for separation on the basis of specific gravity, but such wet process is difficult to control and it is messy. A dry process based upon eddy current reactions is described in U.S. Pat. No. 3,448,857 but such a process is limited to very small sized non-magnetic particles.
  • Aluminum can ends are widely employed both with aluminum can bodies and steel can bodies in forming completed can.
  • Aluminum can ends are fabricated by automatic machinery at a high rate of speed and in a large volume.
  • Conveying systems are used for moving and storing the can ends between work stations, storage areas and assembly areas.
  • can ends are generally propelled with air jets or moved on conveyor belts that are provided with holes through which a vacuum provides a holding force for the can ends on the conveyor.
  • Three existing systems are cumbersome, noisy and require continuous maintenance. Furthermore, they are limited to straight line motions of the can ends. Therefore, it is another object of the present invention to provide an electromagnetic conveying method and apparatus for moving non-magnetic, electrically conductive articles such as aluminum can ends from one location to another.
  • Each pole has a width that is about the same as its opposing nonmagnetic space.
  • the electromagnets are excited in a way to provide alternating magnetic fluxes of two different relative phases travelling across the air gap between adjacent pole edges.
  • This particular magnetic pole arrangement permits wide air gaps to be employed.
  • an ordinary linear induction motor only one row of electromagnetics are provided, or two rows of electromagnets are provided on either side of an air gap with their electromagnet poles and spaces on opposite sides of the air gap being aligned.
  • As the air gap of existing linear induction motors is increased, more and more flux is diverted across the non-magnetic space between adjacent magnetic poles of a given row.
  • wide spaces between poles are required. This is undesirable for the movement of small articles because wide pole spacing results in large areas along the air gap which has insufficient flux density.
  • the regions along the air gap that contain magnetic flux of tworelative phases are substantially increased for a given number of electromagnetic poles. It is the regions of two relative magnetic flux phases that propel a conductive nonmagnetic article when positioned therein. If these regions are too far apart, small articles cannot be. propelled, for if an article having a dimension significantly less than the distance between successive dual phase flux regions, the article may not be moved at all.
  • the air gap must be made smaller than desirable for many applications in order to prevent a significant amount of flux from travelling between adjacent poles rather than going across the air gap.
  • a large air gap is desirable so that large waste material may pass therethrough for separation of electrically conductive non-magnetic particles therefrom.
  • a close spacing of dual magnetic flux phase regions is also desirable for waste material separation so that small articles will be moved by the magnetic forces.
  • a wide air gap is desirable for moving articles such as aluminum can ends, especially if the air gap is in a curved pattern.
  • the magnetic poles arrangement of the present invention permits such effective waste separation and article moving systems.
  • the off-set magnetic pole technique of the present invention has a further advantage that the flux crossing the air gap does so at the edges of the magnetic poles. This flux is thereby of a higher density level than that which occurs in ordinary existing linear induction motors. High flux density is important since the forces imparted on an article within the air gap vary as a square of the flux density acting upon the article.
  • FIG. 1 shows magnetic pole arrangement utilized for the separation of waste material
  • F IG. 2 is a schematic diagram of the magnetic poles of FIG. 1 taken across section 2-2 thereof;
  • FIG. 3 and 4 schematically illustrate modifications in FIG. 5 shows a voltage source for the electromagnets of FIG. 1 and 2;
  • FIG. 6 illustrates schematically-an alternate arrangement of the magnets of FIG. 1;
  • FIG. 7 shows a curved article moving path of magnetic poles
  • FIG. 8 schematically illustrates a complex magnetic force article moving system
  • FIG. 9 illustrates another specific complex force article moving system.
  • FIG. 1 a specific embodiment of the magnetic techniques of the present invention is described for separation of electrically conductive nonmagnetic components of garbage or other waste material.
  • the lightweight components of the waste material (such as paper) and ferrous metals have already been removed by other components (not shown) of a complete waste material processing and recovery system.
  • the remaining waste material 12 is deposited at an end 11 of a conveyor belt 13.
  • the conveyor belt 13 is driven by rollers 15 and 17 at opposite ends thereof. At least one of the rollers is given motion by some appropriate driving mechanism (not shown).
  • the waste material 12 deposited at the end 11 passes through an air gap formed between two rows of electromagnets.
  • a first row of electromagnets 19, 20, 21, and 22 is positioned across the width of the conveyor belt 13 at a distance above it to permit the waste material to pass thereunder under the influence of the conveyor belt.
  • a second row of electromagnets 23, 24, 25 and 27 are positioned immediately beneath the conveyor belt 13 at a position across the conveyor belt 13 directly beneath the first row of electromagnets 19-22.
  • Other specific numbers of magnets may be utilized but nine electromagents as illustrated in FIGS. 1 and 2 is convenient for energization by a three phase source.-
  • the rows of magnets of FIG. I generate eddy currents in non-magnetic electrically conductive material that is positioned in the air gap on the conveyor belt 13. These eddy currents then generate a magnetic field which interacts with the magnetic fields existing in the air gap in a manner which tends to move a nonmagnetic electrically conductive article, such as an article 29 of FIG. 1, off the side of the conveyor belt 13 and into some appropriate receptacle 31.
  • the magnetic poles of the electromagnets shown in FIG.'l are schematically illustrated in a section to show the relative positions of the various magnetic poles. These positions are important in realizing the maximum separation potential of the mechanism of FIG. 1.
  • Each of the magnetic poles 19-22 of the first row have a width a in a direction along the length of the row while a non-magnetic space having a width b is provided between adjacent magnetic poles of the first row.
  • the magnetic poles 23-27 of the second row have a width c and a space between adjacent poles of non-magnetic'material a width b.
  • An air gap is formed by spacing between the first and second rows of poles, the width of this air gap being denoted in FIG. 2 by e.
  • the poles of each row are positioned in a direction across the conveyor belt 13 opposite non-magnetic spaces between poles of the other row of magnetic poles.
  • the pole widths a and c are equal to each other and to both of the polespacings b and d.
  • the air gap dimension e can be as large as the magnitude of the pole spacing b or d as required for the specific application.
  • the extremities of each pole face are positioned substantially directly opposite the extremities of its opposing non magnetic space.
  • the first row of electromagnets 19-22 is excited with one relative phase of alternating current while the second row of electromagnetics 23-27 are excited with a second relative phase of alternating current.
  • the alternating current relative phases may differ by a convenient amount because of standard two-phase electrical supply equipment.
  • the result is that'thefirst row of electromagnets 19- 22 generate one alternating magnetic .flux path 37.
  • the second row of electromagnets23-27 generates a second alternating magnetic flux in the path 39.'The alternating magnetic flux in the paths 37 and 39 are out of phase by the phase difference in the alternating current excitation.
  • FIG. 3 A dimensional variation of the specific'example of FIG. 2 is shown in FIG. 3 wherein each of the pole faces has an equal width but one which is slightly less than the width of the spaces between the poles. It has been found that a specific pole width of 1.25 inch, a pole spacing of 1.5 inch, an air gap of from 1.75 to 2 inches operates satisfactorily in the embodiment of FIG. 1 to remove non-magnetic metal waste materials.
  • pole widths be equal to or somewhat less the width of the opposing pole spaces. Although some overlap of pole faces, such as shown in an exaggerated form in FIG. 4, may be satisfactory in certain circumstances, it is not preferred where a wide air gap is required or desired. It can be seen from FIG. 4 that a plurality of large pole widths results in small non-magnetic spaces between pole widths of this row. This limited pole spacing requires an appropriately small air gap in order to prevent a substantial amount of magnetic flux from travelling across spaces between poles. For this reason, it is preferred that no overlapping of magnetic pole faces occurs.
  • FIG. 2 there are substantially the same number of dual phase magnetic flux particles from shredded areas along the length of the air gap as there are electromagnetics. There are eight such regions generated by nine electromagnetics.
  • FIG. 3 A further advantage of the basic magnetic pole arrangement of the present invention is illustrated with respect to FIG. 3. Since flux passes between sharp corners at the edges of opposing magnetic poles, the magnetic flux is concentrated over a smaller area. The resulting increased flux density thus provides additional propelling force to non-magnetic pieces in the air gap since such a propelling force is proportional to the square of the magnetic flux density.
  • This is an advan- I tage over a configuration of poles such as that shown in FIG. 4 wherein opposing poles overlap each other.
  • the magnetic flux passes between the parallel faces of the opposing pole portions and is thus not as concentrated as in the configurations of FIGS. 2 and 3. Also, since the magnetic flux between poles of FIG.
  • FIG. 2 results in reducing the speed of a travelling magnetic field across the width of the conveyor belt 13. This reduced magnetic field speed results in less slip and consequently more effective forces for conveying non-magnetic metal along the air gap.
  • the direction of forces on electrically conductive non-magnetic articles within the air gap of the rows of electromagnets shown in FIGS. 1 and 2 depends upon the relative phases of the two-phase energization thereof. If the phases are reversed between the first and second rows of electromagnets, the direction of travel across the width of the conveyor belt 13 will be reversed. Other useful moving and guiding functions may be performed by the electromagnet by even different phasing. If the electromagnets l9 and 20 are energized with one phase of a two-phase alternating current supply which results in moving a non-magnetic metal to the right in FIG.
  • Electromagnet 23 19 24 20 25 21 26 22 27 Phase A 1 X X X Phase B X X X Phase C X X X If it is desiredto produce forces from either end of the rows of electromagnets toward the center, the following relative phasing is applied:
  • Electromagnet 23 I9 24 20 25 21 26 22 27 Phase A X X Phase B X X X Phase C X X X X
  • very small pieces of non-magnetic metal to be removed from the conveyor belt 13 could possibly avoid strong dual phase magnetic flux areas in the air gap and thus not be diverted off of the conveyor.
  • the poles may be angled as shown in FIG. 6, which is a top view of a conveyor belt installation.
  • a number of magnetic removal stages may be employed along theconveyor belt 13, some angled as in FIG. 6 and some straight as in FIG. 1.
  • the various stages could have different air gap sizes depending upon the expected sizes of material at the various stagesalong the conveyor belt.
  • not all of the stages need to have an electromagnetic pattern to throw the articles off the conveyor belt but rather one stage could merely guide all nonmagnetic electrically conductive articles into the center of the conveyor belt for separation by a later stage.
  • the possibilities for various combinations of stages of magnetic poles according to the present invention are numerous depending upon the specific article movement job that is required to be done. Additionally, the waste material can be allowed to drop "by gravity through a properly positioned magnetic air gap rather than using a conveyor belt for propulsion.
  • the magnetic pole configuration described with respect to the Figures may also be applied for moving electrically conductive non-magnetic articles, such as aluminum can lids, from one point to another. Thp more efficiently generated electromagnetic forces are utilized as a primary moving source rather than as a mere diversion from some other primary moving force such as a conveyor belt.
  • movingaluminum can lids is illustrated wherein one very long row of poles 45 opposes spaces between mag netic poles of a second row 47.
  • Such a configuration can be used, with the addition of some can lid supporting surface, for moving an aluminum can lid 49 from one point to another between ends of the rows of magnets.
  • the magnets can be laid out to form a flat horizontal path in which the aluminum can lid 49 is propelled in a horizontal position, or the magnets may be placed so that the air gap' is vertical and the aluminum can lid is somewhat rolled along in the air gap.
  • the relative energization of the magnets along the aluminum can lid path is preferably with three-phase electric current in a manner described with respect to FIG. 2.
  • the opposing rows of magnets for an aluminum can lid propelling system may be curved as specifically shown in FIG. 7.
  • Such a curved section is especially useful in a can plant for moving aluminum can lids since a continuous path is possible, including a path from a work station up and over an aisle and backdown to another work station.
  • the curved sections such as shown in FIG. 7 make such continuous movement possible.
  • discrete straight line conveying systems are used wherein the output of one conveying section becomes the input to another, etc., in a very complicated and noisy system.
  • the techniques of the present invention may be applied to form an additional guiding, centering, or. diverting capability.
  • thesolid circles, such as a circle 51 represent a magnetic pole above the articles to be conveyed.
  • the dotted circles, such as a circle 53 of FIG. 8, represent a magnetic pole beneath the articles to be conveyed.
  • the letters on the center of the schematic circle repre- A center row 55 of electromagnets positioned according to the techniques of the present invention is provided for propelling an article such an an aluminum can end 57 from the left to the right along therow 55.
  • rows 57 and 59 of electromagnets which are phased to also provide a propelling force from left to right.
  • the relative phases of the electromagnets of the rows 57 and 59 are chosen with respect to the relative phases of the row 55 to provide diverting electromagnetic forces therebetween, as shown by the arrows. That is, the rows 55 and 57, for instance, are both phased to provide propelling forces from left to right and the relative phases between the adjacent magnets of the rows 57 and 55 are such to provide lateral forces that tend to propel an article out of row 55 and into the row 57. Both of the rows 57 and 59 would not be energized to divert can lids alternately from row 56 to row 57 and then to row 59.
  • Additional rows of electromagnets 61 and 63 are provided in, order to complete the diversion of articles from the center row 55.
  • further rows of electromagnets could be provided depending upon the magnitude of the lateral diversion of articles such as can lids that is desired. It will be recognized that by changing phases of adjacent magnets that forces can be altered'and thus a desired path of movement of an article can be controlled. One such modification is to reverse the left to right forces of the magnets by changing the phasing so that the propelling forces on articles is from the right to the left of the example of FIG. 8. Relative phasing would also be changed so that the lateral forces between rows tended to move can lids from the extreme rows 61 and 63 to the center row 55. Can lids from two separate source rows are then propelled to the left of FIG. 8 and into a common stream in the center row 55.
  • a center row 65 of electromagnets arranged according to the offset pole concepts of the present'invention are connected to a three-phase alternating current source in a manner to provide propelling forces from the left to the right of FIG. 9.
  • Rows of magnets 67 and 69 on alternate sides of the middle row 65 are also connected to have relaternating current excitation from a three-phase source,
  • a magnetic pole arrangement for giving motion to electrically conductive materials comprising:
  • a first row of a plurality of electrically excitable magnetic pole faces forming one side of an air gap, said first row pole faces being positioned with spaces therebetween along said first row,
  • a second row of a plurality of electrically excitable magnetic pole faces forming an opposite side of said air gap, said second row pole faces being positioned with spaces therebetween along said second row,
  • each pole face of the first row being positioned opposite a space of said second row and having a width substantially equal to that of said opposite space
  • each pole face of the second row being positioned opposite a space of said first row and having a width substantially equal to that of said opposite space.
  • the magnetic pole arrangement of claim 1 which additionally comprises means for electrically exciting the magnetic pole faces with alternating current to provide magnetic flux of two distinct relative phases between each pole face and those pole faces adjacent a space opposite said pole face.
  • the magnetic pole arrangement of claim 1 which additionally comprises means connecting the electrically excitable magnetic pole faces to a poly-phase alternating electrical power source for producing a magnetic field therefrom having one of a plurality of relative alternating phases, each pole face of the second row generating a magnetic field having a relative phase different from that of two poles of the first row on either side of a pole space located opposite said each pole.
  • Apparatus for removing electrically conductive particles from a stream of waste material comprising:
  • waste material including electrically conductive and electrically non-conductive particles into a stream along a given path
  • each pole has a dimension along its row that is substantially equal to a space of the other row opposing said each pole.
  • said stream forming means includes a substantially horizontal conveyor belt .with said first row of electromagnetic poles extending across the belt on its underside and said second row of electromagnetic poles extending across the belt a distance above its top side.
  • Apparatus for giving motion to electrically conductive non-magnetic articles such as aluminum can lids comprising:
  • each of the poles of said first and second rows being l positioned opposite a space of the opposing row of poles
  • said energizing means includes means for en- 40 ergizing the electromagnetic poles of the first, second, third and fourth rows to simultaneously exert forces on an article along the lengths of said paths and between said paths, whereby an article may be given complex motion.
  • Apparatus for giving motion to an electrically conductive non-magnetic article comprising:
  • a second row of a plurality electromagnetic poles extending along said path and separated from said first row by an air gap through which said article is to be moved, the poles of the second row being separated along the path from each other by spaces of non-magnetic material.
  • each of the poles of said first and second rows being positioned opposite a space of the opposing row of poles
  • each pole face means for energizing the electromagnetic poles with alternating current to provide magnetic flux of two distinct relative phases between each pole face and those pole faces adjacent a space opposite said each pole face.

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Application Number Priority Date Filing Date Title
US00329587A US3824516A (en) 1973-02-05 1973-02-05 Electromagnetic material handling system utilizing offset pole spacing
CA190,827A CA994406A (en) 1973-02-05 1974-01-24 Electromagnetic material handling system utilizing offset pole spacing
AU65143/74A AU6514374A (en) 1973-02-05 1974-02-01 Electromagnetic material
JP49014407A JPS50138473A (it) 1973-02-05 1974-02-04
FR7403627A FR2216024B1 (it) 1973-02-05 1974-02-04
GB513974A GB1459247A (en) 1973-02-05 1974-02-04 Electromagnetic material handling system utilizing offset pole spacing
DE19742405433 DE2405433A1 (de) 1973-02-05 1974-02-05 Anordnung zum elektromagnetischen foerdern von material
IT20184/74A IT1007241B (it) 1973-02-05 1974-02-05 Sistema elettromagnetico per il trattamento e in particolare per la movimentazione di materiali e lettricamente conduttori non magne tici

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US00329587A US3824516A (en) 1973-02-05 1973-02-05 Electromagnetic material handling system utilizing offset pole spacing

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US (1) US3824516A (it)
JP (1) JPS50138473A (it)
AU (1) AU6514374A (it)
CA (1) CA994406A (it)
DE (1) DE2405433A1 (it)
FR (1) FR2216024B1 (it)
GB (1) GB1459247A (it)
IT (1) IT1007241B (it)

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US3978441A (en) * 1973-09-13 1976-08-31 Deutsche Edelstahlwerke Aktiengesellschaft Permanent magnet holding system
US4043297A (en) * 1973-11-17 1977-08-23 Basf Aktiengesellschaft Device for the magnetic orientation of magnetic recording media
US4003830A (en) * 1974-09-25 1977-01-18 Raytheon Company Non-ferromagnetic materials separator
US4157297A (en) * 1974-10-31 1979-06-05 Max Alth Non-ferrous metal separation by induced attraction system and device
US4106627A (en) * 1975-01-30 1978-08-15 Agency Of Industrial Science & Technology Method and apparatus for use in separation and recovery of non-magnetic metal pieces
US4029573A (en) * 1975-03-17 1977-06-14 Raytheon Company Waste segregating apparatus
US4137156A (en) * 1975-03-21 1979-01-30 Occidental Petroleum Corporation Separation of non-magnetic conductive metals
US4062767A (en) * 1975-06-16 1977-12-13 Occidental Research Corporation Material handling system
US4071442A (en) * 1975-08-11 1978-01-31 Occidental Petroleum Corporation Method and apparatus for recovery of aluminum from solid waste
US4077847A (en) * 1975-08-11 1978-03-07 Occidental Petroleum Corporation Solid waste disposal system
US4127477A (en) * 1975-11-17 1978-11-28 Raytheon Company High capacity materials separation apparatus
US4070278A (en) * 1976-02-03 1978-01-24 Uop Inc. Magnetic segregation of mixed non-ferrous solid materials in refuse
US4083774A (en) * 1976-02-03 1978-04-11 Uop Inc. Magnetic segregation of mixed non-ferrous solid materials in refuse
US4277329A (en) * 1978-10-03 1981-07-07 Maghemite Inc. Induction belt separation
US4313543A (en) * 1979-09-04 1982-02-02 Raytheon Company Multi-size materials separator
US4737753A (en) * 1984-02-22 1988-04-12 Portescap Multipolar magnetization device
US4743364A (en) * 1984-03-16 1988-05-10 Kyrazis Demos T Magnetic separation of electrically conducting particles from non-conducting material
DE3524997A1 (de) * 1985-07-12 1987-01-15 Siemens Ag Verfahren zum herstellen von bandfoermigen siliziumkristallen mit horizontaler ziehrichtung
US4935122A (en) * 1986-12-22 1990-06-19 Dreyfuss William C Mineral separator system
US4834870A (en) * 1987-09-04 1989-05-30 Huron Valley Steel Corporation Method and apparatus for sorting non-ferrous metal pieces
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US5275292A (en) * 1992-05-18 1994-01-04 Brugger Richard D Eddy current separator
US5522513A (en) * 1994-03-30 1996-06-04 Howell; Billy R. Separator disc
US5842094A (en) * 1994-06-14 1998-11-24 Agfa-Gevaert Conveying device for magnetizable particles
US6019200A (en) * 1995-07-06 2000-02-01 Tridelta Magnetsysteme Gmbh Device for braking electrically conducting strips
US6288623B1 (en) * 1997-06-11 2001-09-11 Neuhauser, Gmbh Co. Holding apparatus for transport of conveyed items
US20030038064A1 (en) * 2000-01-27 2003-02-27 Hartmut Harbeck Device and method for sorting out metal fractions from a stream of bulk material
US6696655B2 (en) * 2000-01-27 2004-02-24 Commodas Gmbh Device and method for sorting out metal fractions from a stream of bulk material
US7786693B2 (en) * 2004-12-16 2010-08-31 Eckard Schmitz Method for braking a running metal strip and unit for carrying out the method
US20090026303A1 (en) * 2004-12-16 2009-01-29 Eckard Schmitz Method For Braking A Running Metal Strip And Unit For Carrying Out The Method
EP1974821A1 (en) * 2007-03-26 2008-10-01 F.Hoffmann-La Roche Ag Method and apparatus for transporting magnetic or magnetisable microbeads
WO2008116543A1 (en) * 2007-03-26 2008-10-02 F. Hoffmann-La Roche Ag Method and apparatus for transporting magnetic or magnetisable microbeads
WO2010111765A1 (pt) * 2009-04-01 2010-10-07 Dos Santos, Victor Loureiro Dispositivo para classificação e concentração de partículas ferromagnéticas por ação de campo magnéticoco controlado
CN101757978A (zh) * 2010-03-04 2010-06-30 湘潭大学 弧形行波电磁选矿机
CN101757978B (zh) * 2010-03-04 2012-01-04 湘潭大学 弧形行波电磁选矿机
CN104210805A (zh) * 2013-05-31 2014-12-17 宝山钢铁股份有限公司 悬挂式防侧偏输送带消磁架装置
CN104210805B (zh) * 2013-05-31 2016-06-01 宝山钢铁股份有限公司 悬挂式防侧偏输送带消磁架装置
US20210372470A1 (en) * 2015-06-09 2021-12-02 Novelis Inc. Non-Contact Magnetic Steering
US20190176279A1 (en) * 2017-12-11 2019-06-13 Bystronic Laser Ag Mounting device for machine tools and machine tool with a mounting device
US10625383B2 (en) * 2017-12-11 2020-04-21 Bystronic Laser Ag Mounting device for machine tools and machine tool with a mounting device
CN110976087A (zh) * 2019-12-18 2020-04-10 安徽省米升智能科技有限公司 一种烤瓷粉末原料除铁杂质装置
CN110976087B (zh) * 2019-12-18 2022-01-28 安徽省米升智能科技有限公司 一种烤瓷粉末原料除铁杂质装置
CN113457840A (zh) * 2021-05-24 2021-10-01 吴琦 一种高效脱硫活性炭制备系统
US20240177907A1 (en) * 2022-11-30 2024-05-30 Intel Corporation Carrier chuck and methods of forming and using thereof
US12374482B2 (en) * 2022-11-30 2025-07-29 Intel Corporation Carrier chuck comprising a plurality of magnets and methods of forming and using thereof

Also Published As

Publication number Publication date
FR2216024A1 (it) 1974-08-30
GB1459247A (en) 1976-12-22
DE2405433A1 (de) 1974-08-08
AU6514374A (en) 1975-08-07
FR2216024B1 (it) 1978-02-10
CA994406A (en) 1976-08-03
JPS50138473A (it) 1975-11-05
IT1007241B (it) 1976-10-30

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