Device for separating non magnetic metals from a solid mixture

p0001The invention relates to a device for separating non-magnetizable metals, in particular non-ferrous metals from a solids mixture by means of a rotating drum in which a rotating, components fitted with permanent magnets, magnet rotor is arranged eccentrically.

p0002By means of such known from the older, post-published EP-A-0339195 apparatus can be run the so-called eddy current divorce. The feed material is supplied to the a much smaller outside diameter than having the inside diameter of the rotary drum magnet rotor by means of a conveyor belt or ribbon style. Once the feed material passes into the effective range of the alternating magnetic field, the mixture to be separated eddy currents are induced in the electrically conductive components, build your own, the generator field oppositely directed magnetic fields and thereby accelerate these components by electromagnetic forces relative to the other constituents of the mixture. By eddy current separation can be non-ferromagnetic, electrically highly conductive materials such as aluminum and copper, set apart from non-solid mixtures and non-ferrous metal / nonmetal solid mixtures, such as car shredder debris, electronic scrap and the like. If ferromagnetic parts are included in this material, the eddy current separation can be preceded by a magnetic separation to remove ferromagnetic parts in advance. Suitably also the eddy current divorce other sorting and classification stages are preceded by, because the greatest possible enrichment and fractionation of the feed material has a positive effect on the separation success.

p0003In an eddy current separator known from JP-A-57119856, the pressure exerted on the components contained in the air supplied via a chute solid mixture magnetic forces should be increased. To this end, located at a distance above a bottom, equipped with the permanent magnet rotor magnet eccentrically receiving drum, a second drum, which receives a fitted with permanent magnets, magnet rotor concentrically. Both the drums and the magnet rotors to run in opposite directions.

p0004Finally, from DE-C-915 921 a drum magnetic separator fed with a through DC, to become known inside the drum rotating non-magnetic material magnetic system. The magnet system consists of a designed in the manner of a motor armature pole wheel which rotates independently of the in the same or opposite sense rotating drum. The flywheel can be eccentric or concentric arranged in the drum.

p0005In a separating device known from DE-OS 34 16 504, a solid mixture is passed to the separation of the ferromagnetic portion first by means of a conveyor belt underneath a magnetic separator and then supplied from the conveyor belt for separating the non-ferrous metals of a slowly rotating outer drum. Inside the outer drum a rapidly rotating, stocked with permanent magnet rotor is arranged concentrically. The permanent magnets extend uniformly along the rotation axis of the magnet rotor and are arranged there with a large distance from each other in order to achieve that one to ausbildendes between the poles of the permanent magnets magnetic field acts to as far as possible outside the drum. With this known device to thereby be possible to other eddy current separating processes higher throughputs with larger layer heights of the supplied solid mixture that the release forces of the alternating magnetic field to act already at the time of the solid mixture to the still have the gravitational forces no or little effect.

p0006The solid mixture passes here very early in the region of the alternating magnetic field, namely, before the upper apex of the outer drum. The non-ferrous metal parts are thus further accelerated very early, namely substantially tangentially in the direction of conveyance. These parts therefore go much sooner than the non-conductive material parts in a parabolic trajectory over, ie they lose early contact with the drum.

p0007The acceleration of the non-ferrous metal parts, however, is not enough to sufficiently deflect the beginning already at the apex of the drum trajectory far beyond the drum radius. It can therefore be disabled with either still resting on the drum surface or gravity just detaching, electrically non-conductive parts not rule. The result of the force of the magnetic field detached already at the apex of the drum non-ferrous metal parts meet contrary to those promoted by the outer drum, electrically non-conductive parts, so that there is mutual disabilities. Namely, on the one hand to be deflected, conductive parts slowed down by the non-conductive parts and on the other hand non-conductive parts accelerates undesirable by contact with the conductive non-ferrous metal parts. As a result, blank Fehlausträge in two sorts unavoidable, ie fall and electrically non-conductive parts and vice versa in the storage area of ​​the non-ferrous metal parts.

p0008A device for separating electrically less conductive electrically well conductive materials by means of a rotating outer drum arranged concentrically magnet rotor whose magnets are arranged alternately with a north and a south pole at the periphery of the rotor body, is also from the US-PS 3 448 857 famous. The particular for separating the constituents of the solid mixture is fed to the external drum of the magnet rotor of either a running with small distance above the outer drum by means of a belt conveyor or the outer drum wraps around the conveyor belt. Once the solid mixture passes into the effective range of the alternating magnetic field of the magnet rotor, accelerate the magnetic forces, the highly electrically conductive materials on a more distant trajectory, as the electrically less conductive materials, so that can achieve separation of these components due to the different trajectories.

p0009The invention is based is to provide an apparatus of the aforementioned type, which allows improved operation during the separation of particular non-ferrous metals from a solid mixture the task.

p0010This object is achieved in that the position of the rotational axis of the magnet rotor in the quadrant of the material discharge zone, and thus the effective range of the alternating magnetic field generated by the magnet rotor is adjustable by radial adjustment. It is also proposed that the magnetic rotor about the rotational axis of the drum is pivotable. Due to the particular arrangement and position of the magnetic rotor in the drum and the combined therewith adjustability of the effective range of the alternating magnetic field by the above-mentioned radial displacement and / or swiveling the magnetic rotor about the rotational axis of the drum and so that any possible displacement of the magnet rotor on any curved paths, which for certain material may be grains of importance, the greatest impact of eddy current separation can exploit, so that the full force of the magnetic field flows through the non-ferrous metals in the below "material throw-off zone" area referred the material throw-off zone is reached when the separately Good on either formed directly from the drum or the drum encircling conveyor curved line gravity just begins to slip or fall, so that in the union of the mechanical ejection forces with as late acting repulsive forces of the magnetic field for the non-ferrous metals for the greatest deflection of the trajectory and thus a targeted separation of the remaining mixture components.

p0011With either stepless or gradual adjustment of the rotor shaft and the axis of rotation of the magnet rotor can be the active region of the alternating magnetic field to the mixture in the entire quadrant of the drop zone straight at a specific and narrower area on the drum. The invention is namely the recognition that a disturbing, mutual obstruction of each other is then almost impossible to be separated parts of the solid mixture when the mixture to be separated on the one hand promoted already as far as possible over the apex of the drum out, for example by means of a conveyor belt to about this point is moved forward, and on the other hand, the repulsive forces on the non-ferrous metals is strongest influence when the mixture just still in the material throw-off zone. This detects a concentric verstellender on a radius around the drum axis of rotation to a magnetic rotor all operating requirements sufficient adjustment.

p0012The setting or shifting of the effective range of the alternating magnetic field may be due to the set position of the axis of rotation of the magnet rotor in the quadrant of the material throw-off zone advantageously by adjusting the peripheral speed of the drum favor, because by changing the drum peripheral speed, for example, between 1 m and 3 m / sec, the dependent on the composition of solid mixture, changing material throw-off zone can each move on the part of the drum, where the force of the permanent magnets is under the given circumstances the greatest. The higher the peripheral speed, the more the material throw-off zone approaches the upper apex of the drum.

p0013It is proposed such an adjustment of the eccentric position of the magnet rotor in the quadrant of the discharge zone of the drum, wherein the air gap between the magnet rotor and the drum in the region of the material throw-off zone is the lowest. The respective position of the material throw-off zone is dependent on the circumferential speed of the drum, the type and particle size composition of the solid mixture and the friction between the conveyor belt or the lateral surface of the drum and the mixture to be separated at a given curvature of the drum. As these criteria can be very different, changing conditions, is supported by a corresponding adjustment of the magnet rotor invoice; this can preferably be adjusted by the drum axis in an angular range of 75 ° measured from the vertical center plane. The material throw-off zone, depending on the coefficient of friction of the mixture, and the curvature of the drum, conveniently in the range of about 15 to 50 ° to the plane passing through the rotational axis of the drum vertical. For example, if the angle between the passing through the axis of rotation of the drum vertical and a line connecting the axis of rotation too small with the rotational axis of the rotor shaft, the force of the eddy current graceful act on the non-ferrous metals before the material throw-off zone. The non-ferrous metals would thus speeding up very early, deviate from the desired large deflection of the trajectory and then fall into a collecting container which is therefore not intended for the inferior, not influenced by the alternating magnetic field and a deflected in the direction of conveyance more bombtrajectory mixture components is. Due to the rejection of non-ferrous metals in the feed direction, ie radially to the curved line of the drum, the conveyor width of eddy current separating apparatus according to the invention is not limited.

p0014It has been found that very good results can be achieved with a magnetic rotor with at least two arranged in the longitudinal direction of the rotor shaft, permanent magnet rows. Of the in view of the considerable centrifugal forces carefully on the rotor body - for example, by gluing or screwing - to be mounted permanent magnet forms in Mindestpolzahl the magnetic rotor from two respective row of magnets a north and the other row of magnets a south pole at the periphery of the magnet rotor. In the case of a four-pole magnet rotor are accordingly alternately north and south poles on the periphery of the magnet rotor; it is always to choose such a number of poles that enables alternating Polart.

p0015In embodiment of the invention it is proposed that the magnet rotor having at least two magnet pairs each formed of two adjacent rows of permanent magnets and the angular extent between each a pair of magnets forming rows of permanent magnets is smaller than the angular extent between the magnet pairs. Herewith the knowledge is taken into account that a greater or lesser extent, changing according to the polarity of the permanent magnets, magnetic ring box with a certain basic field intensity formed around the magnet rotor, from which then between the magnetic poles that for separating decisive, if possible with a strong magnetic pulse to be pursued, collect field line tips radially outwardly. The arrangement of diametrically opposed magnet pairs reduces the magnetic basic field strength in the ring zone around the rotor and increases the peak values ​​of the field lines, because the magnetic field lines are primarily in the area between the closely spaced rows of permanent magnets. The reaching greater field strength difference between the ring field around the rotor and the field line tips the cheaper the farther the two magnet pairs apart.

p0016It is recommended that the main body of the magnet rotor preferably has concave recesses in the region between the pairs of magnets. By means of these recesses can be limited even more to the field of closely spaced rows of permanent magnets of each magnet pair and achieve sharper pronounced pulses because the basic field strength is reduced even further in the ring zone around the rotor, the magnetic field lines of the magnet rotor.

p0017It is proposed that one half of the magnet rotor more rows of permanent magnets than the other half. In such a magnetic rotor, the two different magnetic number having halves of the magnet rotor for solid mixtures can be used with different fractions. Such a reduction in the number of permanent magnets having Direction magnet rotor is advantageous if not as large amounts of material obtained in various fractions, so that a wide machine could not be used in its performance. Moreover, this magnet rotor can be optionally converted such that the second half will be continuously equipped with permanent magnets in each row. Preferably, the permanent magnets of every second row of magnets extend axially from one end face of up to the middle of the magnet rotor, whereby according to an advantageous embodiment, the half of the magnetic rotor with fewer rows of permanent magnets may comprise at least two magnet pairs each formed from two adjacent rows of permanent magnets.

p0018According to another embodiment, a directing member is arranged in the region above the material throw-off zone spaced above the drum in the magnetic field of the magnet rotor. This is preferably made of a good magnetic and poor electrical conductive material. Under a directing body, which may be a flat or curved plate, for example, in the present context is a field lines generated by the magnet rotor in the direction of its surface-aligned, understood the field lines more attractive body. The field lines can thus concentrate so that an intense force of the magnetic field is promoted to the non-ferrous metals in the material throw-off zone in this way. By thus reached deeper valleys or notches between the curved field lines is the building up in the ring zone around the rotor, there breached due to the mutual influence of the field lines no effective stimulus more to the non-ferrous metals emitting area and the magnetic field there in of his power strengthened. This measure entails that especially smaller groups (less than 15 mm) may be of the solid mixture magnetically sufficiently influenced and thus better separated.

p0019Advantageously, the directing body should be adjusted. If the target body to pivot both radially adjustable and on a radius around the axis of rotation of the magnet rotor, its distance to the drum or the magnetic rotor to the fractions contained in the solid mixture can adjust this distance of a half to three times the size of the largest should correspond to the grain diameter of the processed material; Also it can be swiveled precisely in the region of the material throw-off zone.

p0020Preferably, the directing member and the magnetic rotor of the same length. Thus, the force of the magnetic field over the entire range of materials can be optimized drop zone.

p0021It is recommended that the target body is cooled, for which purpose it may have flowed through, for example, by oil cooling fins and / or cooling pipes. Excessive due to the eddy current flux heating the target body can thus be avoided.

p0022The drive of the magnet rotor can be preferably provided with a speed control; for example, can be the speed of the magnetic rotor via belt driving electric motor through a variable speed control. By means of the frequency converter, the speed, for example in the range of about 1000 to 3600 rev / min. regulated and thus a further customization of the frequency of the alternating magnetic field to the to be separated solids mixture can be achieved, where very different and especially fine-grained non-ferrous metal components can be in the mixture a correspondingly higher speed and thus higher frequency erfordern.Es advantageously a drive for the magnet rotor within the drum arranged.

p0023According to a preferred embodiment of a drum entwined, driven conveyor belt is provided with at least one transversely arranged driver. By means of the conveyor belt can be namely the fed solids mixture from the feed point equalize until the material throw-off zone on the drum by the layer height of the solid mixture is reduced due to a relative to the feed conveyor, eg a vibrating trough larger belt speed. The conveyor belt can be driven via a arranged in the task pane drum motor. The driver has the purpose described below. The ratio of outer diameter of the magnet rotor to the inside diameter of the drum can be as large choose that the outside diameter of the magnet rotor is considerably smaller than the inner diameter of the drum, so that the conveyor belt may be adhering magnetic parts fall to the lowest point of the drum itself at the latest, because the magnetic field of the magnet rotor is there invalid by the large distance. However, such parts and adhering dirt particles can also be removed with the aid of a scraper from the bottom strand of the conveyor belt. However, can not be excluded that iron particles are not covered by a possibly upstream Fe-separation. This has the consequence that the fine iron particles are held in the effective range of the magnetic rotor, so that the conveyor belt below passes through without taking these particles. Apart from the continuous friction and the growing, accumulating at this point particle amount (threshold effect), the particles heat up due to eddy current flux after a few seconds so strong that it can cause burns to the conveyor belt. This risk can be by means of to lean in the direction of transport across the conveyor belt extending driver, because as soon as the driver enters the region of the particle collection, it tears these particles and transports them from out of the effective range of the magnet rotor or from the heating zone.

p0024Preferably, a shaft end of a drive drum of the conveyor belt can be provided with a clutch disc which is coupled with a power failure with a network-independent auxiliary drive. The problem of damage that cause warming particles, especially occurs during a power failure in the system or in a shutdown of the plant. The then in an area where the magnet rotor remaining metal parts heat up by virtue of its large flywheel continue running and eddy currents inducing in the metal parts of magnetic rotor within a few seconds so strong that is liable to damage both the commonly made of plastic conveyor belt and on the drum , A deceleration of the magnet rotor to an uncritical speed needed because of the large flywheel effect too much time. By contrast, the conveyor belt without having come to a standstill, are moved by means of to delay switching-on auxiliary drive, ie the conveyor belt does not have to be accelerated from rest. The conveyor belt is continued moves after a power failure, until no more material in the field of the magnet rotor. The auxiliary drive need not maintain the full conveyor speed. As auxiliary drive suitable because of their robust and simple construction especially mechanical auxiliary motors, such as a. Means of a previously reared in spring Ready Set spring motor or a known from clockworks engine with weight drive The mechanical auxiliary engines also require almost no maintenance and are also in the winter reliable in extreme cold. It can be used as an auxiliary motor alternatively Preßluftantrieb with a stored Preßluftmenge, an emergency generator with constantly running flywheel for immediate switch, or a DC motor running with Akkumulatorantrieb.

p0025According to another embodiment can drive directly or indirectly as an auxiliary drive in case of power failure of the magnetic rotor, the drive drum of the conveyor belt. For indirect drive the magnet rotor preferably may be provided with a driving drum driving generator. In this way, the rotational energy of the power failure for a certain time following magnetic rotor for driving the driving drum and therefore further movement of the conveyor belt is utilized.

p0026A preferably shaftless mounting of the drum by drum inserts makes it advantageous that the rotor shaft is passed through the drum and from each side of a drum insert can engage the drum. The is flush with its outer coat-applying to the inner surface of the drum, which is screwed to the drum drum inserts need only slightly engage the drum, so that inside the drum remains one opposite the engagement length several times greater, free space sufficient in any case, take the eccentrically arranged rotor shaft to the magnet rotor.

p0027Preferably blank shaft extension of the rotor shaft stored in bearing brackets, which have a provided with a hole circle outer flange, preferably being arranged in the bearing brackets, twistable Einstellflansche on a bolt circle of the outer flange corresponding bolt pattern with threaded holes for each of the outer flange with the adjustment flange connecting screws are provided. The magnetic rotor can move in this way in the hole pitch corresponding steps in a specified range, ie concentrically rotate about the drum rotation axis and adjust the active region of the magnets, for example, from the vertical axis of rotation of the drum to about 75 ° in the direction of rotation of the conveyor belt downwards , The threaded holes can namely with a certain pitch, for example, be placed with a pitch of 6 °, on the hole circle, so that turning the rotatably mounted in the bearing brackets Einstellflansche after releasing the line connecting the outer flanges of the bearing brackets fixed to the Einstellflanschen screws and can be set to a new, the eccentric rotor position determining division.

p0028On the side facing away from the drive bearing side of the magnet rotor, the rotor shaft end superimposed directly in a warehouse that is built into the eccentrically arranged in the drum adjusting flange. For structural reasons, the rotor shaft superimposed on its drive-side bearing side, however, advantageous in a drum in the eccentric bearing support which is rotatably connected to the adjusting flange and serves as a support body for the bearing of the drum insert. By turning the Einstellflansche towards the outer flanges to Eintellflansch to the bearing cap and the drive-side bearing side connecting the adjusting flange with the bearing carrier screws are also adjusted the rotor shaft bearing accordingly, thus changing the eccentric position of the magnet rotor in the drum on the side facing away from the drive side bearing side.

p0029According to an embodiment of the invention, the lid blank with Axialkragen and disposed thereon bearings of each end use in the drum and rotate relative to the drum. Provided that the rotor shaft is preferably mounted in the covers, wherein advantageously the drive-side shaft end can penetrate the cover, the eccentric position of the magnet rotor, and thus the effective region of the alternating magnetic field generated from the magnet rotor by turning the lid can be achieved. For example, can be placed on a bolt circle of the cover screw holes with a certain pitch, which a corresponding hole circle with threaded holes, for example, can be opposite in retaining rings for the drum. After loosening and removing screwed into the holes screw the lid can then rotate to the desired pitch, where they take the magnet rotor.

p0030Preferably can be at least one axle of a passed through the lid, place it in this fixed support shaft in a bearing bracket, which has a provided with a hole circle, stationary outer flange, which opposes a rigidly connected to the axle adjustment flange which is provided on a corresponding hole circle with threaded holes is. In such an embodiment the lid can be adjusted by turning the supporting shaft. The remote from the bearing bracket axle can advantageously be arranged in a support case, ie it does not take in a bearing bracket with bolt circle having Einstellflanschen to be stored. Bilateral bearing brackets are at most only be required only if - to create inside the drum clearance - shaft stubs penetrate from both sides the cover; in this case a bolt-hole bearing bracket on each outer axle could be arranged.

p0031It is recommended to support the rotor shaft of the rotor magnet in supports which are mounted in the interior of the drum at a distance from the covers to the axle. It can be on the one hand, the rotation of the magnet rotor accessible via the support shaft and the other part at least create on one side of the magnet rotor as much free space in the drum interior that there is advantageously a flanged at one of the supports, the rotor shaft driving the hydraulic motor can be arranged. By lying inside the drum motor for the rotor shaft, it requires no force transmission members.

p0032The hydraulic motor may preferably be connected via lines to supply bores of the axle and thus be supplied by a hydraulic aggregate, not shown, with hydraulic fluid.

p0033The invention is explained in more detail with reference to the embodiment shown in the drawing. Show it:<dl id="dl0001"><dt><u>Fig. 1</u></dt><dd> an eddy current sheath device with upstream material feed conveyors and inventively adjustable magnet rotor is mounted eccentrically in the quadrant of a drop zone of a conveyor belt driven drum, in a schematic side view;</dd><dt><u>FIG. 2</u></dt><dd> the conveyor belt with drum and magnet rotor of Figure 1, in plan view.</dd><dt><u>Fig. 3</u></dt><dd> . The shown in Figure 1 in the drum mounted magnet rotor, in the side view of a detail shown enlarged; </dd><dt><u>Fig. 4</u></dt><dd>as a detail a two diametrically opposed pairs of magnets having magnet rotor, in cross section;</dd><dt><u>Fig. 5</u></dt><dd>the magnet rotor according to Figure 4 is provided with concave notches in the regions between the magnet pairs.</dd><dt><u>Fig. 6</u></dt><dd>in perspective and schematically a magnet rotor, wherein the permanent magnets of every second row are arranged axially only to the middle of the base body;</dd><dt><u>Fig. 6a</u></dt><dd>the fewer rows of permanent magnets having half of the magnet rotor according to FIG 6, but with two diametrically opposite pairs of magnets.</dd><dt><u>Fig. 7</u></dt><dd>the drum of Figure 1 in accordance with eccentrically mounted therein magnetic rotor shaft, in longitudinal section.</dd><dt><u>Fig. 8</u></dt><dd>a detail of a bearing bracket with a welded outer flange, which is screwed to an adjusting flange, both flanges are provided with the same hole circles, in the front view;</dd><dt><u>Fig. 9</u></dt><dd>schematically illustrated a mechanical, spring-operated emergency drive for a conveyor belt-driving drum of eddy current separating apparatus of FIG. 1; </dd><dt><u>Fig. 10</u></dt><dd> an embodiment of an eddy current sheath inventive device with a through the right side cover of the drum guided through the support shaft and a mounted on an eccentrically arranged to the axis of the rotor shaft magnet rotor, in longitudinal section; and</dd><dt><u>Fig. 11</u></dt><dd> A while maintaining the carrying axles principle of FIG. 10 modified embodiment of an eddy current separating apparatus according to the invention, in which the rotor drive is arranged inside the drum.</dd></dl>

p0034In one within the eddy current separating apparatus according to the invention preferred plant a non-ferrous metals containing solid mixture is applied to a feed conveyor designed as a vibrating chute 1 according to FIG. 1. During transport in the conveying direction 2, the feed material is made uniform in height and the width of the vibrating trough 1, which supports the later separation of the mixture components. The inclined in conveying direction 2 vibrating trough 1 is the mixture of a low height on a conveyor belt. 3 The conveyor belt 3 is operating with particular horizontal upper run (conveying plane) and wraps around a disposed below the discharge end of the vibrating trough 1 Antreibstrommel 4 and one in the conveying direction 2 further forwardly disposed drum 5. The speed of the conveyor belt 3 is greater than the conveying speed of the vibrating chute 1, so that the layer height of the mixture is further reduced by the achieved during the transfer onto the conveyor belt 3 single layer.

p0035In the drum 5 a magnet rotor 6 is eccentrically arranged in the longitudinal direction of the rotor shaft has a 7-extending, with alternating North Südpolung in the base body 8 attached rows of permanent magnets. 9 A variable-speed drive 10, for an electric motor is used, drives the magnet rotor 6 via a belt 11; the belt drives to this end a pulley 12 which is keyed on the drive side of the magnet rotor 6 with an extended rotor shaft end 13 (see. FIG. 7). The rotation axis 14 of the magnet rotor 6 and therefore the rotor shaft 7 and the magnet rotor 6 is concentric to adjust on a radius around the drum axis of rotation 15th The effective range of the permanent magnets 9 of the magnet rotor 6 can in a continuous from the axis of rotation 15 of the drum 5 vertical 16 and horizontal 17 limited quadrant 18 of the drop zone, which defines the area in which the the conveyor belt 3 lying mixture by gravity to slide or fall comes, be adjusted. The air gap 19 between the magnet rotor 6 and the interior wall of the drum 5 is in this also the material throw-off zone 20 - this is shown in Figure 3 as the angle between the dashed and double-dotted reference lines -. Region having the lowest.

p0036When the magnet rotors 306 and 406, respectively shown in FIGS. 4 and 5, the base body 308 and 408, respectively provided with two diametrically opposite pairs of magnets 78, 79. The angle 80 between adjacent, a pair of magnets 78 and 79 forming rows of permanent magnets 9 is substantially smaller than the angular extent 81 between the two pairs of magnets 78 and 79. Because the one hand, closely spaced rows of permanent magnets 9 of the magnet pairs 78 and 79 and on the other hand widely spaced pairs of magnets 78 and 79 causing the generated from the magnet rotor 306 and 408 magnetic field lines are largely limited to the region of the closely-spaced poles of the adjacent rows of permanent magnets 9 so that trained pronounced magnetic pulses. Limiting the magnetic field lines to the field of closely spaced poles of the two rows of permanent magnets of the magnet pairs 78 and 79 is also supported by the FIG. 5 concave, axially continuous recesses 82 in the base body 408th

p0037In a further embodiment of a magnetic rotor 506 has one half 506a more rows of permanent magnets 9a, 9b as the other half 506b on; shown in FIG. 6 only has to over the entire width of the magnet rotor 506 extending permanent magnets 9a, every other row of the base body 508 with alternating pole sequence peripherally arranged rows of permanent magnets, while the other rows from one end face from axially only up to the by line 83 marked the middle of the magnet rotor 506 are provided with permanent magnet 9b. As the only the right, with fewer rows of permanent magnets 9a provided half 506b of the magnet rotor 506 shown in FIG. 6 representing Fig. 6a can be seen, there are 78a two pairs of magnets formed from two adjacent rows of permanent magnets 79a arranged, which are diametrically opposite , The rows lying between the pairs of magnets 78a, 79a are up to the position indicated by the line 83a center of the magnet rotor 506 free of permanent magnets. The magnet rotor 506 can optionally separately on the 6 left or right 83 lying in Fig. Of the line halves 506a and 506b and are treated in this manner with a magnet rotor 506, two different mixtures of solids solid mixtures of different fractions. To separate feeding of solid mixtures can the existing feed conveyor 1 and the conveyor belt 3 a center, in the conveying direction extending partition (partition plate) are assigned; Alternatively there may be two separate allocations.

p0038The means of the conveyor belt 3 to well above the peak midpoint (see. The vertical 16) of the drum 5 also transported mixture is already in a parabolic trajectory 21, for which, owing to the fully effective at the material throw-off zone 20 force of the eddy current is a most deflected curve with a correspondingly strong rejection of non-ferrous metals results. The corresponding to the trajectory 21 deflected non-ferrous metals fall defined in an erected from the collection point for the other mixture components, reservoirs, not shown. By means of having its apex in a substantially horizontal direction adjustable separating saddle 22 is supported separation into valuable non-ferrous metal components and other components. The latter constituents fall according to arrow 23 with substantially no deflection down and get in the transport direction 2 seen in an area in front of the separating saddle 22. A carrier 24 of the conveyor belt 3 prevents material accumulations any FE-components in the effective range of the magnet rotor and a wiper 37 below the lower run of the conveyor belt 3 clips possibly due to the magnetic force tenaciously to the conveyor belt 3 remaining iron particles and adhering fine dirt particles definitively.

p0039Referring to FIGS. 1 and 3, the magnetic rotor 6 a position a, in which the angle between the passing through the drum rotation axis 15 vertical 16 and a connecting line 25 '(dash-dot line shown) of the drum rotation axis 15 with the axis of rotation 14 of the rotor shaft 7 45 °. The adjustment angle of the effective range of the magnetic field of the magnet rotor 6 can - starting from the vertical 16 - amount in the rotational direction 75 °, such as between the solid line connecting 25 and the vertical 16 is defined by the angle 26 in Figure 1 and 3;. the desired position of the magnet rotor can be varied accordingly.

p0040The quality of the separation effect, especially when in the fed solids mixture fractions smaller grain size are contained, is further enhanced by a directing member 84 shown in FIG. 3, located in the area above the material throw-off zone 20 at a distance above the drum 5 in the magnetic field of the magnet rotor 6 is and extending over the entire length of the magnet rotor. 6 The target body 84 is namely that extend the field lines of the alternating magnetic field generated by the magnet rotor 6 to the target body 84, which attracts the field lines and concentrated in a desired manner. It can thus be elongated field lines incised with deep form of the surface of the drum 5 Limited remote valleys that provide defined pulses to the material components. An optimum action of force of the magnetic field can be achieved if the as the magnet rotor 6 pivotable in the circumferential direction and / or to the surface of the drum 5 adjustable in its radial distance directional body 84 occupies the position shown in Fig. 3, that is on the extension of the material throw-off zone 20 and the drum rotation axis 15 extending connecting line 25 'is.

p0041. As shown in Figure 7, access from both sides of the drum inserts 27 flush with the inner circumferential surface in the drum 5 a; the drum 5 is mounted so shaftless. The drum inserts 27 are rotationally fixed by means of screws 28 and retaining rings 29 connected to the drum 5 and rotate bearing 30, of which the bearing of the drive side 31 is mounted on a bearing support 32 and on the opposite side to an adjusting flange 33rd The bearing bracket 32 ​​and the adjustment flange 33 take rotor shaft bearing 34, in which the rotor shaft 7 rotates with the shaft journal 35, 36th The bearing bracket 32 ​​and the adjustment flange 33 on the opposite side take the rotor shaft bearing 34 eccentrically on. The bearing bracket 32 ​​of the drive side 31 is connected by screws 39 with an adjusting flange 40 of the drive side 31st

p0042Both the Eintellflansch 33 and the adjustment flange 40 has on its outer circumference with a certain pitch 41 (see Fig. 8.) Radial spaced threaded holes 42; these lie on a pitch circle 43 for holes 45 corresponds to a pitch circle 44 in both on the drive side 31 and the opposite bearing side welded to a bearing bracket 49 outer flange 47th As long as in the corresponding holes 42 and 45 screwed screws 48 the Foreign and adjustment flange 47 and 33 and 40 interconnect the eccentric position of the rotor shaft 7 in the drum 5 remains unchanged. Only after the loosening and tightening screws 48 and subsequent rotation of the joint adjustment through a bracket 38 (adjustment positions of the bracket are shown 38 dashed lines in Fig. 8) interconnected Einstellflansche 33, 40 to one or more partitions 41 adjusted due to the connection 40 of the adjusting means of screws 39 to the bearing bracket 32 ​​and on the adjustment flange 33 disposed therein rotor shaft bearings 34th

p0043In Fig. 8 is 49 the drive side 31 shown with bolted to the outer flange 47 behind it and therefore not visible adjusting flange 40 as a detail the bearing bracket. The bearing brackets 49 can be screwed, for example, to the above support 62 (fig. 7) anchored to the foundation bearing arms 46 of the conveyor belt 3. To reinforce and increase the strength of the support of the rotor shaft 7, the bearing bracket 49 is provided with a vertical support 50 and a bent, welded on one side to the support 50 and the other with the bearing bracket 49 rib 51st The device for adjusting the rotational axis 14 of the magnet rotor 6 concentric with the drum rotation axis 15 necessarily be solved screws 48 are all free zugänglic h.

p0044Thus, the conveyor belt 3 is not instantly stop when a power failure, but at least is still running until the overlying mixture is discharged through the drum 5 addition, 9 is placed a clutch disk 53 of FIG. On a shaft end 52 of Antreibstrommel 4 that at power failure with an auxiliary drive 61 (see. FIG. 1) is coupled. The auxiliary drive 61 illustrated is designed as a mechanically operating spring motor and has a clutch plate 53 opposite, be locked in place when the mains voltage, corresponding coupling part 54 on a shaft 55. The coupling member 54 engages with a locking finger 56 in a likewise mounted on the shaft 55, a spring receiving spring housing a 57th By rotating the spring housing 57 by a motor 58, the spring is wound, that is prestressed, wherein the number of revolutions is controlled by a revolution counter 59th At the motor 58 a current meter 60 is connected, which allows a motor current measurement during winding or winding the spring to check on spring break or other damage. Coincides the mains voltage, engages the coupling part 54 in the clutch disc 52 a, wherein the locking finger 56 disengages from the spring housing 57 so that the stored energy of the spring is free. Which then together with the shaft 55 rotating spring housing 57 directs the rotational motion over the coupling of the disc 53 and the coupling member 54 existing electromagnetic clutch to the driving drum 4 on; the conveyor belt 3 thus moves accordingly forward.

p0045Alternatively, power failure, the run-energy of the magnetic rotor 6 and exploited, for example, via a coupling the driving drum 4 driven by a certain time trailing, ie circulating without power magnet rotor. 6 As shown schematically in Fig. 2, the run-on energy of the magnet rotor 6 feeds a arranged on the rotor shaft generator 85 which is electrically connected according to the dashed line 86 to the driving drum 4 and also connected through an intermediate switch 87 to a power source 88. If power failure, the line voltage drops to zero, falls in accordance with a relay of the intermediate switch 87 and switches on the generator 85 to power to the driving drum 4. Since the intermediate switch 87 is connected to the power source 88, the intermediate switch relay is switched immediately to the normal drive to and the generator 85 as soon as the power is restored.

p0046When executing an eddy current separating apparatus according to the invention shown in Fig. 10 accesses from each end of a cover 63 with a Axialkragen 64 and disposed thereon bearing 65 in the drum a. During operation, the drum 105 rotates on bearings 65, while the cover 63 are welded to a longitudinally guided through the drum support shaft 66 and remain in their position. The same time, the drum rotation axis 115 defining the support shaft 66 protrudes with axle ends 67, 68 projecting from the lids 63 and stored outside the drum 105 on the one hand in a bearing bracket 146 and on the other hand in a bearing 69. The axle 67 receiving bearing bracket 146 consists of a stationary, with a bolt circle 144 provided outside flange 147, which is opposed to a rigidly connected with the support shaft 66 adjustment flange 133; the adjusting flange is provided on a corresponding hole circle 143 with threaded holes 142nd

p0047The magnet rotor 106 with its axis of rotation 114 is located eccentrically in the drum 105. The drive side 131 facing away from the shaft end of the rotor shaft 107 is supported by a bearing 70, the lid 63 is arranged as the bearing 71 at the drive shaft end 136 in an inner bearing projection 72 is. On the drive side 131 penetrates the rotor shaft 107 to the shaft end 136 to cover 63; on the shaft end 136, a pulley 112 is arranged.

p0048To adjust the position of the magnet rotor 106 in the drum 105 after dissolving and removing the constraints imposed by the bores of the adjusting 133 and the outer flange 147, symbolized by dashes screws firmly connected to the axle 66 adjustment flange 133 to be determined by means of the hole pitch is new rotated relative position to the non-moving outer flange 147th Since the cover 63 are welded to the support shaft 66, the rotational movement of the adjusting flange 133 on the cover 63, thus the bearing in the lids rotor shaft 107 and, consequently, take the magnetic rotor 106 transmits.

p0049The illustrated in FIG. 11 embodiment of an eddy current separating apparatus according to the invention differs in the supporting axis structure and the adjustability of the magnet rotor 206 with its axis of rotation 214 is not of the embodiment of FIG. 10. Again, there is the axle 67 receiving bearing bracket 246 from a stationary, with a bolt pattern 244 provided outside flange 247, which is opposed to a rigidly connected with the support shaft 66 adjustment flange 233; the adjusting flange is provided on a corresponding hole circle 243 with threaded holes 242nd Notwithstanding the other hand, only the support of the rotor shaft 207 of the magnet rotor 206 in separate columns 73, 74, which are welded in the interior of the drum at a distance from the cap 63 with the same time, the drum rotation axis 215 defining support shaft 66th The support 74 is applicable offset inwardly that there is sufficient space for a directly flange-mounted on the support 74 drive remains, which is designed as a rotor shaft 207 driving hydraulic motor 75th The hydraulic motor 75 is connected via lines 76 to supply holes 77 for the inlet and outlet of the hydraulic fluid, the 68 through the support shaft 66 and the axis of the end to a pressure medium source, not shown. When rotating the adjusting flange 233 rotates due to the fixed connection of the supports 73, 74 with the support shaft 66 corresponding to the stored in the supports 73, 74, rotor shaft 207. In this embodiment, the eddy current separating apparatus, the lid 63 need not be connected to the support shaft 66, that is, not to be twisted with, to enable a new Einstelllage of the magnet rotor 206 in the drum 205th