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
  • B03C1/23—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
  • B03C1/247—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 rotating magnetic drum
• • 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
  • B03C1/031—Component parts; Auxiliary operations
  • B03C1/033—Component parts; Auxiliary operations characterised by the magnetic circuit
  • B03C1/0332—Component parts; Auxiliary operations characterised by the magnetic circuit using permanent magnets
• • 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
  • B03C1/04—Magnetic separation acting directly on the substance being separated with the material carriers in the form of trays or with tables
  • B03C1/06—Magnetic separation acting directly on the substance being separated with the material carriers in the form of trays or with tables with magnets moving during operation
• • 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
• • 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
  • B03C2201/00—Details of magnetic or electrostatic separation
  • B03C2201/20—Magnetic separation whereby the particles to be separated are in solid form
• • 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
  • B03C2201/00—Details of magnetic or electrostatic separation
  • B03C2201/22—Details of magnetic or electrostatic separation characterised by the magnetical field, special shape or generation

Definitions

• Magnetic separator of non-ferrous metal conductive elements and selective sorting plant comprising such separators
• the invention relates to a magnetic separator for sorting non-ferrous metal conductive elements comprising:
• At least one first inductor shaped as a disk provided with a plurality of magnetic elements distributed on its periphery and intended to generate a magnetic field, and comprising a vertical axis of rotation
• a sorting plate of dielectric material extending parallel to the first inductor and comprising guiding and evacuation means corresponding to the trajectories of the elements to be sorted, the variation of the magnetic field in the air gap generating currents induced in the elements; conductors and causing their sliding on the sorting tray, according to trajectories dependent on their interaction with said induced currents.
• the invention also relates to a selective sorting installation comprising such magnetic separators.
• An eddy current type magnetic separator is conventionally used in all known sorting installations, to separate the non-ferrous conductive metal products of inert products such as cardboard, plastic, ceramic. Such a magnetic separator can also be used to sort products with low and high electrical conductivity.
• a magnetic separator 10 typically comprises a feed belt 11, which are routed products 12 to sort.
• the belt 11 is stretched over at least two cylinders, an inlet cylinder (not shown) and an output cylinder 13, equipped with a pole wheel 14, acting as a field inductor generating a magnetic field.
• the pole wheel 14 is provided with a succession of permanent magnets 15 on its periphery and rotates at high speed inside the non-metallic cylinder 13, for example clockwise along the arrow R1.
• the magnets 15 are arranged successively with alternating polarity. This results in variations of the magnetic field above the belt 11, in the vicinity of the output cylinder 13.
• the products 12 are subject to variations in the magnetic field, which causes the products 12 to repel under the effect of induced eddy currents, when they are non-ferrous metals.
• This difference in behavior between the different kinds of products 12 is used to separate the inert, nonmetallic metals which fall naturally at the exit of the carpet 11, non-ferrous metals which, because of the repulsion, are projected well into the beyond the exit of the carpet 11.
• the inert products 12 fall between the arrows F1 and F2 at the exit of the belt 11, the weakly conductive products 12 are projected, according to the arrow F3, in a more distant zone and the products 12 strongly. conductors are projected beyond a deflector 16, according to the arrow F4.
• the sorting of the products 12 is thus carried out according to a principle of projection of the products 12, according to their distinct trajectories. depending on the intrinsic characteristics of the products 12 and their interaction with the induced currents flowing through them.
• EP-A-0579966 describes an example of a magnetic separator for sorting non-ferrous conductive metal products in a flow of any products, according to the general principle of sorting described above.
• the magnetic separator comprises two parallel pole wheels mounted on a same axis of rotation inside an output cylinder, causing the conveyance of a conveyor belt on which the products to be sorted circulate.
• the products are projected forward out of the carpet, under the effect of the repulsion due to the magnetic field created between the pole wheels.
• the trajectories of the products are different according to the intrinsic characteristics of the products and their level of electrical conductivity.
• DE 197 37 161 discloses a magnetic separator with induced eddy currents, comprising an inductor with a vertical axis of rotation and a sorting plate parallel to the inductor.
• the parts to be sorted are oriented on the sorting tray according to their trajectory induced by the eddy currents.
• the sorting tray has patterns on its upper surface and includes a first end located towards the center of the inductor and a second end extending radially outwardly of the inductor.
• such a configuration of the separator does not allow optimal sorting and the effectiveness of such a plate, associated with the inductor, remains less.
• the object of the invention is to remedy the aforementioned drawbacks and to provide a magnetic separator of the eddy current type which is reliable, easy to implement and offers optimum quality and efficiency of sorting.
• the invention also relates to the realization of a selective sorting installation comprising such magnetic separators and to obtain significant gains in terms of productivity and efficiency of sorting.
• the magnetic separator according to the invention is more particularly characterized in that the sorting plate is of substantially circular shape and has an axis of rotation eccentric with respect to the axis of rotation of the first inductor, the sorting plate being rotatably mounted in the opposite direction to the direction of rotation of the first inductor.
• the sorting installation according to the invention is more particularly characterized in that the magnetic separators are arranged in a plurality of rows and / or columns.
• FIG. 1 schematically shows a front view of a magnetic separator, according to the prior art.
• FIG. 2 represents a perspective view of a particular embodiment of a magnetic separator.
• FIG. 3 is a partial top view in section of the magnetic separator according to FIG. 2.
• Figures 4 and 5 show in perspective, respectively seen from above and from below, another embodiment of a magnetic separator.
• FIG. 6 diagrammatically represents an alternative embodiment of a magnetic separator according to FIGS. 4 and 5.
• Figure 7 schematically shows another embodiment of a magnetic separator.
• Figures 8 and 9 show, respectively a top view and a front view, of a particular embodiment of a magnetic separator according to the invention.
• Figure 10 shows schematically a sorting installation according to the invention.
• the magnetic separator 10 of the eddy current type comprises a first inductor 18 in the form of a disc provided with a plurality of magnetic elements, preferably permanent magnets 19, distributed at the periphery of its upper face ( Figure 3).
• the first inductor 18 comprises an even number of magnets 19, arranged with alternating polarity on the periphery of the disc.
• the first inductor 18 is integral with a central axis of rotation 20 (FIG. 2) protruding from both sides of the disc and intended to be rotated to vary the magnetic field created by the magnets 19 of the first inductor. 18.
• the axis of rotation 20 of the first inductor 18 is mounted vertically in rotation, for example, on a support frame 21, having a base 22 and an arch 23, between which the axis of rotation 20 is mounted. of the first inductor 18.
• An actuating motor 24 is arranged on the base 22 of the frame 21 and comprises an axis of rotation (not shown) connected to the axis of rotation 20 of the first inductor 18 via, for example, a transmission belt 25 ( Figure 5).
• the rotational drive of the axis 20 integral with the first inductor 18, in the clockwise and / or anti-clockwise direction thus causes the variation of the magnetic field created by the plurality of magnets 19, in the air gap above of the upper face of the first inductor 18.
• the magnetic separator 10 comprises a sorting plate 26, preferably made of dielectric material, extending parallel to the first inductor 18 above it, in order to cover the first inductor 18 (FIG. 3).
• the magnets 19 are arranged on the open upper face of the first inductor 18, to be located closer to the sorting plate 26 and create a strong magnetic field at the level of the entire sorting plate 26.
• the sorting plate 26 is integral with either the support frame 21 or another separate frame (not shown), to be completely independent of the rotation of the first inductor 18.
• the first inductor 18 and the sorting tray 26 are arranged on the support frame 21, so that the first inductor 18 and the sorting plate 26 remain parallel to the substantially horizontal plane of rotation of the first inductor 18 ( Figure 3).
• the sorting plate 26 and the first inductor 18 are then arranged horizontally and connected to the outlet, for example, of a conveyor belt of conductive elements made of non-ferrous metal, intended to be separated from a flow of elements. inert and / or ferromagnetic.
• the sorting plate 26 has an inlet groove 27 made in the thickness of the sorting plate 26, through which the elements to be sorted arrive.
• the inlet groove 27 opens onto a sliding path 28, made in the thickness of the sorting plate 26 and delimiting, for example, four outlet grooves 28a, 28b, 28c, 28d, also produced in the thickness of the plate
• the output grooves 28a to 28d are connected, for example, to separate collection bins via conduits (not shown).
• the sorting tray 26 is of substantially rectangular shape.
• the first exit groove 28a is formed on a lateral edge of the sorting plate 26 (FIG. 3) and corresponds to the evacuation of the inert elements.
• the second exit groove 28b is formed on the other lateral edge, and corresponds to the evacuation of the ferromagnetic elements.
• the third exit groove 28c is formed on the edge of the sorting plate 26 opposite the edge of the inlet groove 27 and corresponds to the evacuation of the inert elements having been accidentally driven by the non-ferrous conductive elements.
• the fourth exit groove 28d is formed on the same edge as the third exit groove 28c and corresponds to the output of the non-ferrous conductive elements.
• the first inductor 18 is rotated, for example clockwise along the arrow R2 ( Figure 3), before the arrival of the elements to be sorted.
• the rotation of the magnets 19 causes the variation of the magnetic field above the inductor 18, at the level of the sorting tray 26.
• the elements are then subjected to the induced currents (eddy currents), when they arrive on the path of sliding 28 of the sorting tray 26.
• the completely inert elements are not influenced by the induced currents that pass through them and are directed directly to the first output groove 28a, after abutting against an edge of a central stud 29a of the tray sorting 26.
• the elements thus recovered are then evacuated according to the arrow S1.
• the other metallic elements traversed by the induced currents are constrained to follow the path of the sliding path 28.
• the ferromagnetic elements are positioned at the level of the magnets 19 during their sliding on the sliding path 28 and abut with a projecting wall 29b of the sorting tray 26, defining the exit groove 28b.
• the ferromagnetic elements are then discharged along the arrow S2 through the exit groove 28b.
• the magnetic separator 10 applies to the separation of the non-ferrous conductive elements from the ferromagnetic or inert elements.
• the magnetic separator 10 can also be applied to the separation of weakly or strongly conductive elements, in particular by acting on the gap between the first inductor 18 and the sorting plate 26 or the magnetic frequency of the magnets 19.
• the operation of the separator The magnetic circuit 10 is identical to the operation described above and the elements having the highest electrical conductivity level are discharged through the last output groove 28d.
• the operation of the magnetic separator 10 thus solicits the resultant force of the eddy currents only on sliding, thanks to the rotation of the first inductor 18 in a horizontal plane parallel to the scrolling of the elements and the sliding of the elements on the sorting plate 26.
• the path slip 28 corresponds substantially to the position of the magnets 19 during the rotation of the first inductor 18 ( Figure 3).
• the trajectory of the elements on the sliding path 28 and the evacuation of the elements according to the different output grooves 28a to 28d are dependent on the interaction of the elements with said induced currents.
• the direct contact of the elements to be sorted with the magnetic field optimizes the sorting efficiency.
• the magnetic separator 10 comprises a second inductor 30, arranged parallel to the sorting plate 26 and to the first inductor 18.
• the second inductor 30, preferably arranged under the arch 23 of the support frame 21, is integral with the axis of rotation 20 of the first inductor 18.
• the distance of the gap between the second inductor 30 and the sorting plate 26 is preferably identical to the distance of the gap between the sorting plate 26 and the first inductor 18.
• the sorting plate 26 is disposed substantially in the center of the magnetic separator 10, between the first 18 and second 30 inductors, so as to optimize the volume of passage for the elements to sort.
• the second inductor 30 is identical to the first inductor 18 and arranged symmetrically with respect to the sorting plate 26, so that its magnetized surface is disposed just above the sorting plate 26, facing the magnetized surface of the first inductor 18.
• the magnetic separator 10 comprises means for adjusting the gap between the first inductor 18 and the second inductor 30.
• the adjustment means may comprise, for example, a set of spacers positioned between the inductors 18 and 30 and the sorting plate 26.
• Such adjustment means make it possible to adjust and adjust the value of the magnetic field at the level of the sorting plate 26, in order to optimize the sorting of the elements, in particular in the case of elements to be sorted with high particle size or in the case of sorting by electrical conductivity level.
• the magnetic separator 10 advantageously comprises an angular offset system (not shown) for modifying and adjusting the angular position. magnets 19 of the second inductor 30 relative to the magnets 19 of the first inductor 18, in three characteristic positions.
• the first position consists in having the magnets 19 facing each other in the same polarity, namely a north pole N of the first inductor 18 opposite a north pole N of the second inductor 30.
• the second position consists in having the magnets facing each other. 19 of opposite polarities, namely a pole south S of the first inductor 18 facing a north pole N of the second inductor 30.
• the third position is to arrange the magnets 19 of the first inductor 18 opposite the intervals between the magnets 19 of the second inductor 30.
• Such a shift system angular allows in particular to obtain different induction values and orientations of magnetic field lines, depending on the elements to be sorted and applications, for optimal sorting efficiency.
• the magnetic separator 10 is shown schematically with the sorting plate 26 between the first inductor 18 and the second inductor 30.
• the axis of rotation 20 of the first 18 and second 30 inductors protrudes from inductors 18 and 30 and constitutes the reference axis of the magnetic separator 10.
• the magnetic separator 10 comprises means for adjusting an angle X of inclination of the axis of rotation 20 relative to the vertical.
• the magnetic separator 10 comprises a pivoting system connected to the axis of rotation 20, or to the support frame 21, in order to incline the magnetic separator 10 by an angle X, for example between 0 ° and 20 °.
• the magnetic separator 10 thus inclined makes it possible to adjust the flow of elements to be sorted and to optimize the sliding of the elements to be sorted on the sorting plate 26, in particular as a function of the particle size, moisture content and fluidity of the elements.
• the magnetic separator 10 may also include a vibrating system 31, for example of the oscillating spring type, preferably connected to another support frame 32, separate from the support frame 21 of the first 18 and second 30 inductors.
• the vibrating system 31 is connected only to the sorting plate 26, so that the rotation of the inductors 18 and 30 is not disturbed by the vibrations of the sorting plate 26.
• the vibrator 31 facilitates the sliding of the elements on the sorting plate 26 and can be used irrespective of the number of inductors and regardless of the angle of inclination of the magnetic separator 10 with respect to the vertical.
• the magnetic separator 10 comprises a plurality of additional inductors 33, arranged in the air gap of the two inductors 18 and 30.
• Each additional inductor 33 is designed as a disk provided with magnets 19 distributed over the periphery of its upper and lower faces.
• the additional inductors 33 are all integral with the same axis of rotation 20 as the inductors 18 and 30.
• a sorting plate 26 (not shown in FIG. 7 for the sake of clarity) is disposed in each interval of two inductors 18, 30, 33 successive.
• the magnetic separator 10 comprises a sorting plate 26 between the first inductor 18 and the additional inductor 33 disposed just above, a sorting plate 26 between each additional inductor 33 and a sorting plate 26 between the second inductor 30. and the additional inductor 33 disposed just below.
• a vibrating system 31 can be associated with each sorting tray 26.
• Such a magnetic separator 10, with a plurality of additional inductors 33 offers a significant gain in terms of space, especially in the case where the separator 10 is installed in a confined space.
• Sorting trays 26 are superimposed, which means that a single magnetic separator 10 can sort different types of elements, each sorting tray 26 corresponding to each type of elements.
• This also results in a significant gain in terms of manufacturing cost, because only one additional inductor 33 cooperates with two sorting trays 26, thanks to its magnetized upper and lower faces.
• the magnetic separator 10 according to the invention is distinguished from the previous embodiments by the shape of the sorting tray 26 and by its operation.
• the first inductor 18 comprises two rows of magnets 19 disposed on its periphery.
• the axis of rotation 20 is rotatably mounted in the support frame 21 via, for example, an actuating motor (not shown) connected directly to the axis of rotation 20 (FIG. 9).
• the sorting plate 26, of substantially circular shape (FIG. 8) is arranged parallel to the first inductor 18, in the zone subjected to the magnetic field variations generated by the rotation of the first inductor 18.
• the sliding path 28 is substantially the periphery of the sorting plate 26 and defines the central pin 29a, also of substantially circular shape ( Figure 8).
• the axis of rotation A1 of the sorting plate 26 is eccentric with respect to the axis of rotation 20 of the first inductor 18 (FIG. 9), so that the magnetized surface of the first inductor 18 is arranged at at any time, only facing a portion of the sliding path 28 of the sorting plate 26.
• the sorting tray 26 is rotatably mounted, for example, on a horizontal surface of the support frame 21 by means of slider elements 34.
• the sorting tray 26 rotates along the arrow R3 (FIG. 8), in the direction inverse to the direction of rotation R2 of the first inductor 18 (FIG. 8).
• the sorting plate 26 is driven by a second actuating motor 35, preferably adjustable speed, secured to the support frame 21 and having a toothed wheel 36 at the free end of its axis of rotation. .
• the toothed wheel 36 cooperates with a circular ring 37 protruding from the sorting plate 26 and constituting the base of the sorting plate 26 (FIG. 9). The operation of the sorting plate 26 will be described in more detail with reference to FIGS.
• the first inductor 18 rotates in the direction of the arrow R2, in the counterclockwise direction, and the sorting plate 26 rotates according to the arrow R3. clockwise.
• the elements to be sorted arrive via a supply duct 38, the end of which extends above the sliding path 28 of the sorting plate 26, in the zone of the magnets 19 of the first inductor 18 (FIGS. 8 and 9).
• the supply duct 38 may be mounted vibrating, for example by means of an oscillating spring system 39 (FIG. 9), to promote the separation of the elements and the movement of the elements in the supply duct 38.
• the elements to be sorted fall on the sorting plate 26 and are subject to variations in the magnetic field generated by the rotation of the first inductor 18.
• the non-ferrous metal conductive elements are then traversed by the eddy currents and driven in the direction of rotation. of the first inductor 18. They then slide on the sliding path 28 of the sorting plate 26, as a function of their interaction with the induced currents, in the direction opposite to the direction of rotation of the sorting plate 26. They are then ejected at the outside of the magnetic separator 10, in a first receiving zone, after having abutted against a barrier 40, serving as a means for guiding and evacuating the conductive elements. The conductive elements are then recovered in a tray disposed just below the barrier 40 and the support frame 21 of the magnetic separator 10.
• the elements are then evacuated from the sorting plate 26 via, for example, a scraper 41, actuated by a compressed air device and extending over the entire width of the sliding path 28.
• the scraper 41 is intended for eject the elements of the sliding path 28 in a second receiving zone disposed substantially under the scraper 41 and the frame 21.
• the scraper 41 may be replaced by a rotating brush 42, or may be used in combination with the rotating brush 42, disposed in the area of the sorting tray 26 unaffected by the magnetic field of the first inductor 18 ( Figure 8).
• the brush 42 preferably has a diameter that covers the entire width of the sliding path 28 and rotates in the same direction of rotation as the sorting plate 26 (FIG. 9).
• the magnetic separator 10, according to FIGS. 8 and 9, may comprise means for adjusting the air gap between the sorting plate 26 and the first inductor 18, means for tilting the first inductor 18 and the sorting tray 26 relative to the vertical and a vibration system connected to the sorting tray 26.
• the magnetic separator 10 may also comprise a second inductor 30 and a plurality of additional inductors 33, as described in FIGS. 4 to 7, all coaxial with the first inductor 18 and offset with respect to the axis A1 of the plate or plates of sorting 26.
• the magnetic separator 10 according to FIGS. 8 and 9 is particularly intended for the treatment of compact elements, namely of pasty consistency and notably comprising elements made of ferromagnetic materials.
• the falling of the elements on the sorting plate 26 allows the nonferrous conductive elements to be released from the compact mass of the other non-conductive elements.
• the particular configuration of the magnetic separator 10, with the sorting plate 26 eccentric with respect to the first inductor 18, makes it possible to to concentrate the variations of the magnetic field at the point of fall of the elements to be sorted on the sorting plate 26 (FIGS. 8 and 9), for an optimal sorting efficiency.
• a selective sorting installation 43 is shown schematically and partially. It comprises, for example, a plurality of magnetic separators 10 arranged in rows and a plurality of magnetic separators 10 arranged in columns.
• the magnetic separators 10 arranged in lines are intended in particular to increase the productivity of the installation 43 and the sorting rates of the elements, since the installation 43 makes it possible to simultaneously sort different types of elements, with a magnetic separator 10 for each type. elements.
• the magnetic separators 10 arranged in columns are intended in particular to carry out a refining of the sorting of the elements.
• the installation 43 may include means 44 for transport and connection between the different magnetic separators 10 arranged in columns.
• the first magnetic separator 10 of the first column of the installation 43 made it possible to sort the conductive elements of the inert or ferromagnetic elements. These elements are evacuated by the exit groove 28d and are transported by the connecting means 44 to the supply duct 38 of the second magnetic separator 10 of the first column. The latter is precisely configured in order to sort the elements according to their level of electrical conductivity.
• the outgoing elements through the groove 28d of the second magnetic separator 10 of the first column thus have a higher electrical conductivity level than the conductive elements of the magnetic separator 10 which precedes it, and so on all along the first column.
• the magnetic separators 10 used in such a sorting installation 43 may be those shown in FIGS. 8 and 9 and may be single inductor 18, dual inductors 18 and 30 or multiple inductors 18, 30 and 33.
• Each line and each column of the installation 43 may comprise the same type of magnetic separator 10 or a mixture or alternation of magnetic separators 10 according to the various embodiments described above ( Figures 2 to 9).
• Such a magnetic separator 10 has the following advantages in particular.
• the centrifugal forces generated by the rotation of the inductors 18, 30, 33 are perpendicular to the axis of magnetization of the magnets 19.
• the mechanism necessary to hold the magnets 19 does not encroach on the magnetic zone used for the sliding of the elements on the plateau. sorting 26.
• the sorting tray 26 can be arranged closer to the magnetic source, thanks to the air gap adjustment means, and the magnetic field lines are adjustable, thanks to the angular position adjustment means.
• the sorting plate 26 is independent of the inductors 18, 30, 33 and easily removable, without touching the inductors 18, 30, 33.
• the mechanical assembly of the magnetic separator 10 is very simple, there is no coaxial bodies to rotate at different speeds and there is no mechanical stress.
• the magnetic separator 10 can comprise any oscillating system 31 that can cause the sorting plate 26 to vibrate, for example a pneumatic or electromagnetic system, and any adjustment system for inclining the magnetic separator 10 relative to the vertical.
• the actuating motor 24 can be replaced by any other drive system for rotating the axis 20 of the inductors 18, 30, 33 and the belt 25 can be replaced by any other means for transmitting a movement. of rotation.
• the actuating motor 24 can be connected directly to the axis of rotation 20 of the inductors 18, 30, 33, depending on the desired applications.
• inductors 18, 30, 33 may comprise several rows of magnets 19.
• the size of the magnets 19 and the speed of rotation of the magnets 19. inductors 18, 30, 33 are not limited.
• the gap between the different inductors 18, 30, 33 and the sorting trays 26 varies according to the elements to be sorted and the desired applications.
• the permanent magnets 19 of the inductors 18, 30, 33 may be replaced by electromagnetic coils connected to supply rings.
• the sorting tray 26 may include an interchangeable wear liner.

Landscapes

• Sorting Of Articles (AREA)
• Coating With Molten Metal (AREA)
• Treatment Of Steel In Its Molten State (AREA)

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Citations (6)

• 2005
  • 2005-04-21 FR FR0504002A patent/FR2884735B1/fr not_active Expired - Fee Related
• 2006
  • 2006-04-12 EP EP06743682A patent/EP1879700B1/de not_active Not-in-force
  • 2006-04-12 ES ES06743682T patent/ES2342616T3/es active Active
  • 2006-04-12 WO PCT/FR2006/000807 patent/WO2006111636A1/fr not_active Application Discontinuation
  • 2006-04-12 DE DE602006012959T patent/DE602006012959D1/de active Active
  • 2006-04-12 AT AT06743682T patent/ATE460991T1/de not_active IP Right Cessation

Patent Citations (6)

Non-Patent Citations (1)

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