JPH10379A - Rotary drum type nonmagnetic material sorting and recovering device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable sure sorting and recovering by alternately arranging magnets arranged with adjacent opposite surfaces to the same pole having a magnetization direction in the normal direction of a drum and magnets having the magnetization direction in a normal direction in such a manner that the drum side is of the same pole as the magnetic pole of the same polarity and rotating these magnets in the direction opposite to the progressing direction of a conveyor. SOLUTION: The first magnets 16, 16' having the magnetization direction which is approximately the same as the tangent direction of the drum 1 are arranged apart spaced intervals along the circumferential direction of a cylindrical magnetic member 3. The second magnets 17, 17' having the magnetization direction which is approximately the same as the normal direction of the drum 1 are arranged at the respective intervals. These magnets are so arranged that the adjacent opposite surfaces of the first magnets are of the same pole and that the second magnets are of the same pole as the poles of the first magnets to which the drum 1 side is adjacent. The magnetic fluxes generated from the N pole of the second magnets are, therefore, penetrated through the drum 1 and are admitted into the S pole of the second magnets. The magnetic fluxes generated from the second magnets are effectively taken outside. The rotating direction of a magnet rotor 4 is made reverse from the progressing direction of the conveyor, by which the conductive magnetic metallic piece 15 are made to fly forward.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotating drum type non-magnetic metal sorting / recovering apparatus for separating and recovering a conductive non-magnetic metal such as aluminum and copper from a processed material, and particularly to a small-diameter conductive non-magnetic metal collecting apparatus. The present invention relates to a rotating drum type non-magnetic metal sorting and collecting apparatus for collecting magnetic metal pieces.

[0002]

2. Description of the Related Art In recent years, as environmental problems have attracted attention, resources are being reused.
Iron as well as non-ferrous metals, paper, cloth, wood chips, synthetic resins,
Resource recovery is performed in a wide range such as rubber and glass, and new technologies are adopted for the recovery system. 2. Description of the Related Art Among non-ferrous metals, a device for sorting and collecting non-magnetic light metals represented by aluminum is frequently used for collecting and reusing aluminum and the like contained in municipal waste aluminum or cutting scraps of scrapped automobiles. Conventionally, those applying magnetic force as a means of sorting and recovering non-ferrous metals from other wastes are conventionally, linear motor type applying moving AC magnetic field, inside drum type in which permanent magnets are arranged around the outer periphery of rotary kiln-shaped rotating cylinder, Numerous structures, such as a sliding separator type in which permanent magnets are arranged below the smooth slope, or a rotating drum type in which the drum around which the conveyor belt is wound has a double-structured drum and permanent magnet rotors are arranged inside Has been proposed.

[0003] Among the above, a rotary drum type is most often used, and a conventional example thereof is shown in FIG. In FIG. 10, an endless conveyor belt 10 has one end wound around a drive roller 9 and the other end wound around a drum 1. The drive roller 9 is driven by a motor 7 through a V-belt 8 by an arrow R.
By rotating in the direction of R, the conveyor belt 1
0 travels in the direction of arrow RB. Therefore, the drum 1 as a driven roller rotates in the direction indicated by the arrow RD. The drum 1 is made of a non-magnetic material.
A permanent magnet rotor 4 is rotatably disposed concentrically with the drum 1.

Next, the structure of the permanent magnet rotor 4 is shown in FIG.
Shown in A magnet 2 and a magnet 2 'magnetized in the normal direction on the outer peripheral surface of the cylindrical magnetic member 3 have N poles and S poles alternately positioned at equal angular intervals on the drum 1 side along the circumferential direction. And the outer surfaces thereof are fixed so as to be close to the inner peripheral surface of the drum 1. The permanent magnet rotor 4 is concentric with the drum 1 and rotates in the same direction RM as the rotation direction RD. However, the permanent magnet rotor 4 is rotationally driven via the V-belt 5 by another motor 6 so that the rotation speed (peripheral speed) is different. It has a heavy structure. Note that the rotation speed of the permanent magnet rotor 4 is set to be sufficiently higher than the rotation speed of the drum 1.

Thus, the magnetic flux C flowing out of the N pole of the magnet 2 passes through the drum 1 and the conveyor belt 10 wound thereon and flows into the S pole of the magnet 2 '. A strong magnetic field is generated on the surface of the substrate 10, which has various effects on the processed object (14 or 15). Further, on the lower front side of the drum 1, containers 18 and 19 for collecting the processed materials dropped from the conveyor belt 10 and sorted are arranged, and the container 18 includes paper, cloth, wood chips, and the like.
A non-metallic piece 14 such as a synthetic resin and a conductive non-magnetic metal piece 15 such as aluminum and copper are collected in the container 19.

The operation of the above-mentioned rotary drum type non-magnetic metal sorting and collecting apparatus is as follows. First, when a processed material in which the conductive non-magnetic metal pieces 15 and the non-metal pieces 14 are mixed is thrown in from the upper end opening portion of the hopper 13, it falls on the surface of the conveyor belt 10, and moves along with the center axis of the drum 1 as the conveyor belt 10 runs. To the upper region of the perpendicular passing through, i.e., the top. Here, the processed material on the conveyor belt 10 has a certain thickness and has a layered shape, but is shown in a scattered state in FIG. 10 for easy understanding.

When the processed material reaches the top of the drum 1,
Due to the high-speed rotation of the permanent magnet rotor 4 provided inside the drum 1, it passes through a high-frequency alternating magnetic field generated by the magnet 2 and the magnet 2 'fixed on the outer peripheral surface of the cylindrical magnetic member 3. At this time, an eddy current described by the Faraday electromagnetic induction is generated inside the conductive non-magnetic metal piece 15, and the direction of the magnetic flux generated by the eddy current and the permanent magnet rotor 4
Since the directions of the generated magnetic fluxes are opposite according to Lenz's law, a repulsive force (repulsive force) in the centrifugal direction is generated by the interaction between the two. Further, the conveying force of the conveyor belt 10 acts as a combined force, so that the conductive non-magnetic metal pieces 15 fly forward and upward as viewed from the running direction of the conveyor belt 10, and a parabolic shape is formed from almost the top of the drum 1. Locus a
, And is sorted and collected in the container 19.

Further, the non-metallic piece 14 in the processed material is a magnet 2
And does not receive any magnetic action of the magnet 2 ′, falls freely by its own weight, and moves along the locus of “b”.
Sorted and collected to 8.

FIG. 12 shows a quarter sectional view of a conventional permanent magnet rotor 4. As shown in FIG. FIG. 12 shows a case where the magnet 2 and the magnet 2 ′ are fixed on the outer peripheral surface of the cylindrical magnetic member 3 at equal angular intervals of 30 ° along the circumferential direction. The demagnetizing field running inside the magnet in an attempt to weaken the magnetization of the magnet decreases as the distance between the north pole and the south pole increases. Therefore, in order to reduce the influence of the demagnetizing field and increase the magnet's magnetism, the member for fixing the magnet is formed of a magnetic material such as iron, and the magnetic circuit of the adjacent magnet is connected to connect the N pole in the magnet. It is generally known that the distance between S and the S pole should be increased. Assuming that the angle in the counterclockwise direction in FIG. 12 is θ, the relationship (magnetic flux density distribution) between the magnetic flux density B in the direction normal to the outer surface of the drum 1 and the angle θ is as shown in FIG. When the angle θ becomes 15 ° or more, a similar magnetic flux density curve is periodically drawn, so that the angle θ is shown in the range of 0 ° to 15 °.

Generally, the repulsive force F which a conductive non-magnetic metal piece receives from a permanent magnet rotor is expressed by the following equation. F∝Bg ² × f × σ × A / ρ (1) where Bg: magnetic flux density f: frequency (= number of magnet drum poles × number of rotations of magnet drum) σ: electric conductivity A: surface area of the processed material ρ : Density It can be understood from the equation (1) that when the conductive non-magnetic metal piece 15 to be sorted and collected has a small diameter, its surface area becomes small and the repulsive force F becomes small.

[0011]

In the conventional rotating drum type non-magnetic metal sorting and collecting apparatus, when the conductive non-magnetic metal piece has a small diameter, the repulsive force received from the permanent magnet rotor becomes small, so that reliable sorting and collecting can be performed. There was a problem that it was difficult. In addition, since the shape of the conductive non-magnetic metal piece is not uniform, the locus of free fall is not uniform due to air resistance or the like, and there has been a problem that the accuracy of sorting and collecting is not stable. SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to provide a rotary drum type non-magnetic metal sorting and collecting apparatus capable of surely sorting and collecting.

[0012]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides an endless conveyor belt wound around a driving roller, a passive roller and an auxiliary pulley, and an inner peripheral surface of the conveyor belt. A cylindrical non-magnetic drum, and a plurality of permanent magnets rotatably disposed within the drum, and a plurality of permanent magnets fixed along the circumferential direction of the cylindrical magnetic member in proximity to the inner peripheral surface of the drum. A rotating drum type non-magnetic metal sorting and collecting apparatus having a cylindrical permanent magnet rotor formed as described above, wherein the permanent magnet has a magnetization direction substantially the same as a tangential direction of the drum, and the first permanent magnet is disposed with a gap therebetween. And the magnet
The second magnet is arranged in each gap between the first magnets, and has a magnetization direction substantially the same as the normal direction of the drum, and the adjacent facing surfaces of the first magnets have the same polarity, and A technique in which the second magnet between the poles is arranged such that the drum side has the same polarity as the magnetic pole of the same polarity, and the permanent magnet rotor is rotated in a direction opposite to the traveling direction of the conveyor belt. Tactics were adopted. Further, in the present invention, the cross-sectional shape of the cylindrical magnetic member is substantially gear-shaped, the first magnet is fixedly arranged on an outer peripheral surface of a concave portion of the cylindrical magnetic member, and the convex portion of the cylindrical magnetic member has the first magnet. The second magnet may be fixedly arranged. Further, in the present invention, a non-magnetic plate is bonded and fixed to the inner magnetic pole surface of the first magnet, and a magnetic plate is bonded and fixed to the inner magnetic pole surface of the second magnet,
The two magnet members may be fixed to the cylindrical magnetic member by using a mechanical or adhesive agent. Further, in the present invention,
Removal means for separating and removing the magnetically levitated conductive non-magnetic metal by gas injection may be provided on the side of the conveyor belt.

[0013]

FIG. 1 is a schematic sectional view of a rotary drum type non-magnetic metal sorting and collecting apparatus according to an embodiment of the present invention. However, the same parts as those in the conventional example are denoted by the same reference numerals, and detailed description thereof will be omitted. The basic structure of the rotating drum type non-magnetic metal sorting and collecting apparatus of the present embodiment is similar to the structure of the conventional example shown in FIG. 10, except that the permanent magnet rotor 4 rotatably disposed inside the drum 1 has a specific structure. Structure and the rotation direction of the permanent magnet rotor 4
In the direction opposite to the traveling direction, that is, the rotation in the direction opposite to the conventional example. Further, in the conventional example, the conductive non-magnetic metal piece 15 is dropped from the end of the conveyor belt 10, whereas the present invention is also greatly different in that the conductive non-magnetic metal piece 15 is separated and collected by magnetically levitating in an intermediate region of the conveyor belt 10. Points.

First, the overall structure of the apparatus of the present invention will be described in detail with reference to FIG. The endless conveyor belt 10 has a drive roller 9 at one end and a passive roller 11 at the other end.
The auxiliary pulley 12 is further wound around three rollers located below the rollers. The drive roller 9 has a function of rotating the conveyor belt 10 in the direction of the arrow RB by rotating the drive roller 9 in the direction of the arrow RR via the V-belt 8 by the motor 7.

The cylindrical non-magnetic drum 1 having a plurality of permanent magnets and having a rotatable permanent magnet rotator 4 built therein is brought into contact with the back surface of the conveyed belt 10 in the processed material transport area. Are located. Permanent magnet rotor 4
Is in the direction of the arrow RM via the V belt 5 by the motor 6,
That is, it is rotated clockwise, which is opposite to the conventional example shown in FIG. At this time, since the drum 1 is in contact with the conveyor belt 10, it rotates in the direction of arrow RD. Therefore, the rotation direction of the permanent magnet rotor 4 and the rotation direction of the drum 1 are opposite.

According to the above configuration, a processed material in which non-metal pieces 14 such as paper, cloth, wood, and synthetic resin and conductive non-magnetic metal pieces 15 coexist is conveyed by the hopper 13 to the conveyor belt 10.
When supplied above, it is conveyed in the RB direction and reaches the upper region of the permanent magnet rotor 4. Since the non-metallic pieces 14 in the processing object are not subjected to the magnetic action by the magnet, they pass through the upper region of the permanent magnet rotor 4 and reach the passive roller 11, and then fall freely by their own weight and are collected in the collection container 18. .

On the other hand, when the conductive non-magnetic metal piece 15 reaches the upper region of the permanent magnet rotor 4, it receives a magnetic action from the permanent magnet rotor 4 and floats above the conveyor belt 10, for example, as shown in FIG. It is separated and removed by such means. FIG. 6 shows an example in which a floating conductive non-magnetic metal piece is separated and removed by using a jet gas (for example, air). In the structure shown in FIG. 6, an air jet device 20 is installed on one side of the conveyor belt 10, and air is jetted from a direction perpendicular to the running direction of the conveyor belt 10 (perpendicular to the plane of the drawing) to form a conductive non-magnetic metal. The piece 15 is blown off to the other side of the conveyor belt 10 (indicated by a broken line in the drawing) and collected.

Next, the structure of the permanent magnet rotor of the present invention is shown in FIG.
This will be described in detail below. FIG. 2 shows a quarter sectional view of the permanent magnet rotor 4 of this embodiment. Along the circumferential direction of the cylindrical magnetic member 3, first magnets 16 and 16 ′ whose magnetization directions are substantially the same as the tangential direction of the drum 1 are arranged with a gap therebetween, and the magnetization direction is the same as the normal direction of the drum 1. Substantially identical second magnets 17, 17 'are arranged in each gap between the first magnets 16, 16'. Opposite facing surfaces of the first magnets 16 and 16 ′ have the same polarity, and the second magnets 17 and 17 ′ are arranged so that the drum 1 side has the same polarity as the adjacent first magnets 16 and 16 ′. . That is, in FIG. 2, the first magnet 16 is N
The first magnet 16 'is magnetized such that the second magnet 17' side is the S pole, and the second magnet 17 'side is the S pole. Further, the second magnet 17 is magnetized so that the drum 1 side has an N pole, and the second magnet 17 'has the drum 1 side having an S pole.

According to the above magnet arrangement, the N of the second magnet
The magnetic flux generated from the pole passes through the drum 1 and flows into the south pole of the second magnet adjacent to the magnet. Attention is paid here to the second magnets 17 and 17 ′. Since the magnetized first magnet 16 exists between the two magnets as shown in FIG. The magnetic flux that causes a short circuit can be substantially eliminated. Therefore, the magnetic flux generated from the second magnet 17 can be effectively extracted to the outside, and the magnetic flux density on the surface of the drum 1 can be improved.

FIG. 2 shows the case where the equiangular intervals between the first magnets 16 and 16 'are set to 30 °, and FIG. 3 shows the magnetic flux density distribution in the normal direction of the outer surface of the drum 1 in this case. 3, the vertical axis indicates the magnetic flux density B, and the horizontal axis indicates the counterclockwise angle θ from the X axis. When the angle θ becomes 15 ° or more, a similar magnetic flux density curve is periodically drawn. Therefore, the angle θ is shown in the range of 0 ° to 15 °.

When comparing the magnetic flux density with the conventional example (FIG. 13), the maximum value (absolute value) of the magnetic flux density B is 3 in the conventional example.
In contrast to 600 G, this embodiment (FIG. 3) has 490 G.
0G, which is about 1.36 times the numerical value, and it is clear that the magnetic flux density on the outer surface of the drum 1 is improved.

In FIGS. 2 and 12, H is a centrifugal repulsion vector received by the non-magnetic metal piece, V is a tangential velocity vector due to rotation of the drum, and F is a repulsion vector H
4 shows a composite vector of the velocity vector V and the velocity vector V. The magnitude of the repulsion caused by the generation of the eddy current under the same condition is proportional to the square of the magnetic flux density acting on the object. That is, the high-frequency alternating magnetic field generated by the first magnets 16 and 16 'in the present embodiment is about 1.36 times as large as the high-frequency alternating magnetic field generated by the magnets 2 and 2' in the conventional example. The magnitude of the centrifugal repulsion vector H received by the piece is about 1.8 times. Therefore, even if the conductive non-magnetic metal piece has a small diameter, more reliable sorting and collection can be performed.

Next, in the present invention, the permanent magnet rotor 4
The reason why the direction of rotation is relatively opposite to the direction of travel of the conveyor belt 10 will be described with reference to FIGS.

FIG. 4 shows a state of the conventional example, that is, a state in which the rotation direction RM of the permanent magnet rotor 4 and the traveling direction of the conveyor belt 10 are relatively the same. In FIG. 4, the conveying force FB is the same as the traveling direction RB of the conveyor belt 10.
And the repulsive force F explained from the electromagnetic induction of the permanent magnet rotor 4
Since the resultant FT with M acts, the conductive non-magnetic metal piece 1
5 flies forward of the permanent magnet rotor 4. Therefore, conventionally, the sorting accuracy is improved by causing the conductive non-magnetic metal piece 15 to fly as far as possible in front of the permanent magnet rotor 4.

FIG. 5 shows a state of the present invention, that is, a state in which the rotation direction RM of the permanent magnet rotor 4 is relatively opposite to the traveling direction of the conveyor belt 10. In FIG. 5, the first magnet is omitted. In the case of FIG. 5, similarly to FIG.
Conveying force F in the same direction as the traveling direction RB of the conveyor belt 10
B and a repulsive force FM, which is explained by the electromagnetic induction of the permanent magnet rotor 4, acts on the repulsive force FM.
And the upward resultant force FT occurs,
The conductive non-magnetic metal piece 15 floats vertically above the permanent magnet rotor 4.

As described above, the distance in which the conductive non-magnetic metal piece 15 floats vertically above the permanent magnet rotor 4 depends on the rotation direction of the permanent magnet rotor 4 being relatively opposite to the traveling direction of the conveyor belt 10. That is, it can be seen that the state of FIG. 5 is larger than the state of FIG. Since the present invention employs a method of removing the conductive non-magnetic metal pieces magnetically levitated vertically above the conveyor belt, it can be easily understood that the method of FIG. 5 is more suitable.

FIG. 7 shows one of the permanent magnet rotors 4 of another embodiment.
FIG. In FIG. 7, the cross-sectional shape of the cylindrical magnetic member 3 is substantially gear-shaped, and first magnets 16 and 16 ′ are arranged on the outer peripheral surface of the concave portion of the cylindrical magnetic member 3.
The second magnets 17 and 17 ′ are arranged on the outer peripheral surface of the convex portion. The first magnet 16, 16 'and the second magnet 17, 1
7 'is arranged such that the magnetization direction is the same as in the above-described embodiment.

By adopting the configuration shown in FIG. 7, the second magnets 17 and 17 'form a magnetic circuit (generate an external magnetic field) with the convex portion of the substantially gear-shaped cylindrical magnetic member 3. The effective magnetic path length increases, and the magnet operating point increases.
Further, a highly efficient magnet drum can be obtained by interaction with the repulsive force of the first magnets 16, 16 '.

FIG. 7 shows a case where the equiangular interval between the first magnets 16 and 16 'is 30 °, and FIG. 8 shows the magnetic flux density distribution in the normal direction of the outer surface of the drum 1 in that case. 8, the vertical axis indicates the magnetic flux density B, and the horizontal axis indicates the counterclockwise angle θ from the X axis. When the angle θ becomes 15 ° or more, a similar magnetic flux density curve is periodically drawn. Therefore, the angle θ is shown in the range of 0 ° to 15 °.

When comparing the magnetic flux density with the conventional example (FIG. 13), the maximum value (absolute value) of the magnetic flux density B is 3 in the conventional example.
In contrast to 600 G, this embodiment (FIG. 8) has 580 G.
0G, which is about 1.6 times the numerical value, and it is clear that the magnetic flux density on the outer surface of the drum 1 is greatly improved. In addition, since the magnitude of the repulsion vector H in the centrifugal direction received by the non-magnetic metal piece is about 2.5 times, even if the conductive non-magnetic metal piece has a small diameter, it is possible to more reliably sort and recover. Become.

FIG. 9 shows the permanent magnet rotor 4 in consideration of the assembling property.
The structure of is shown. The same parts as those in the conventional example are denoted by the same reference numerals, and detailed description thereof will be omitted. The permanent magnet rotor 4 shown in FIG. 9 is a cylindrical magnet having a non-magnetic plate 21 with the first magnets 16 and 16 ′ bonded and fixed and a magnetic plate 22 with the second magnets 17 and 17 ′ bonded and fixed by bolts 23. The structure fixed to the member 3 is adopted. That is, the configuration is such that both the adhesive fixing and the mechanical fixing are used. By employing the above configuration, even if there is a repulsive force due to a magnetic force, it is possible to mechanically forcibly fix it, so that the assemblability is improved and the cost can be reduced by shortening the working time and the like.

The apparatus according to the present invention shown in FIG. 1 and the conventional apparatus shown in FIG. 10 were manufactured respectively, and the results of comparing the sorting and collecting efficiency of the conductive non-magnetic metal pieces are described below. The main dimensions of each part of the device according to the invention shown in FIG.
The materials and specifications are as follows. Drum 1: φ200 × 300 mm, FRP permanent magnet rotor 4: φ190 × 250 mm, number of poles 16 Nd-Fe-B based rare earth magnet (Hitachi Metals HS-40A)
H) Number of revolutions 2500 rpm Distance between driving roller 9 and passive roller 11: 1000 mm Distance between driving roller 9 and drum 1: 600 mm Effective width of conveyor belt 10: 240 mm Surface moving speed of conveyor belt 10: 51 m / min , Passive roller 11 and auxiliary pulley 1
The configuration is the same as that of the device according to the present invention, except that 2 is removed.

The processed material subjected to the comparative test has a rough shape of φ5.
5,000 cm ₃ of resin pellets of 10 mm × 10 mm, φ10 × 0.
100 pieces of 5 mm aluminum pieces were mixed, and the supply to the conveyor belt 10 was repeated using a vibration feeder. Table 1 shows the results of the comparative test.

[0034]

[Table 1]

Comparing the average recoveries from Table 1, the conventional apparatus shows 40.8%, whereas the apparatus according to the present invention shows a high value of 73.0%. Therefore, it is clear that the apparatus according to the present invention is much superior to the conventional apparatus for sorting and recovering small-diameter conductive non-magnetic metal pieces.

[0036]

Since the present invention has the above-described structure and operation, it solves the problems of the conventionally known rotary drum type non-magnetic metal sorting / recovering apparatus, and in particular, the small-diameter conductive material mixed in the processed material. Non-magnetic metal pieces can be sorted and recovered accurately and reliably.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of a sorting and collecting apparatus according to one embodiment of the present invention.

FIG. 2 is a view showing a quarter section of a permanent magnet rotor of the sorting and collecting apparatus according to one embodiment of the present invention.

FIG. 3 is a magnetic flux density distribution in a sorting and collecting apparatus employing the permanent magnet rotor of FIG.

FIG. 4 is a view for explaining a force acting on a conductive non-magnetic metal piece of a conventional sorting and collecting apparatus.

FIG. 5 is a diagram for explaining a force acting on a conductive non-magnetic metal piece of the sorting and collecting apparatus according to one embodiment of the present invention.

FIG. 6 is a view showing a separating and removing unit according to one embodiment of the present invention.

FIG. 7 is a view showing a quarter section of a permanent magnet rotor of a sorting and collecting apparatus according to another embodiment of the present invention.

FIG. 8 is a magnetic flux density distribution in a sorting and collecting apparatus employing the permanent magnet rotor of FIG. 7;

FIG. 9 is a view showing a quarter section of a permanent magnet rotor of a sorting and collecting apparatus according to another embodiment of the present invention.

FIG. 10 is a schematic sectional view of a conventional sorting and collecting apparatus.

FIG. 11 is an enlarged view of a main part of FIG. 10;

FIG. 12 shows 1/1 of the permanent magnet rotor of the conventional sorting and collecting device.
It is a figure showing four sections.

FIG. 13 is a magnetic flux density distribution in a conventional sorting and collecting apparatus.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... drum, 2 '2 ... magnet, 3 ... cylindrical magnetic member, 4 ...
Permanent magnet rotor, 5,8 ... V belt, 6,7 ... motor,
9: drive roller, 10: conveyor belt, 11: passive roller, 12: auxiliary pulley, 13: hopper, 14: non-metallic piece, 15: conductive non-magnetic metal piece, 16, 16 ': first magnet, 17 , 17 ': second magnet 18, 19: collection container, 20: air injection device 21: non-magnetic plate, 22: magnetic plate, 23: bolt

Claims (4)

[Claims] An endless conveyor belt wound around a driving roller, a passive roller and an auxiliary pulley; a cylindrical non-magnetic drum provided in contact with an inner peripheral surface of the conveyor belt; A cylindrical permanent magnet rotor, which is rotatably disposed and has a plurality of permanent magnets fixed along the circumferential direction of the cylindrical magnetic member in proximity to the inner peripheral surface of the drum. In the magnetic metal sorting and collecting apparatus, the permanent magnets are arranged in a first magnet having a magnetization direction substantially the same as a tangential direction of the drum and arranged with a gap therebetween, and in each gap between the first magnets. The second magnet has a magnetization direction substantially the same as the normal direction of the drum, and the opposing surface of the first magnet has the same polarity, and the second magnet between the poles is the drum. Side is the same polarity as the same polarity magnetic pole Arranged, the permanent magnet rotor rotating drum type non-magnetic metal sorting recovery apparatus characterized by being rotated in the direction opposite to the traveling direction of the conveyor belt. 2. The cylindrical magnetic member has a substantially gear-shaped cross section, the first magnet is fixedly arranged on an outer peripheral surface of a concave portion of the cylindrical magnetic member, and the first magnet is fixed to a convex portion of the cylindrical magnetic member. 2. The rotary drum type non-magnetic metal sorting and collecting apparatus according to claim 1, wherein the two magnets are fixedly arranged. 3. A non-magnetic plate is bonded and fixed to the inner magnetic pole surface of the first magnet, and a magnetic plate is bonded and fixed to the inner magnetic pole surface of the second magnet, so that the two magnet members are connected to each other. 3. The rotary drum type non-magnetic metal sorting and collecting apparatus according to claim 1, wherein the cylindrical magnetic member is fixed to the cylindrical magnetic member using a mechanical or adhesive agent. 4. The apparatus according to claim 1, further comprising a removing means for separating and removing the magnetically levitated conductive non-magnetic metal by gas injection on a side of the conveyor belt. Rotary drum type non-magnetic metal sorting and recovery equipment.