JP4243236B2 - Drum type magnetic separator - Google Patents

Description

The present invention relates to a drum-type magnetic separator, and in particular, has two drum-type magnetic separators, and has an efficiency of selecting magnetic deposits (for example, iron) from processing raw materials in which magnetic deposits and non-magnetic deposits are mixed. The present invention relates to an improved drum type magnetic separator.

For example, as described in Patent Document 1, a permanent magnet is disposed inside a rotating cylindrical body (drum) made of a nonmagnetic material, and magnetic materials such as iron in a raw material that is gradually conveyed are separated. Widely done.
FIG. 5 shows an example of a conventional magnetic separator. This magnetic separator 70 is disposed over a conveyor 71 that conveys a raw material 70a containing magnetic deposits, and includes main rollers 72, 73 and subordinates. It has an endless belt 76 laid over rollers 74, 75, magnetism generating means 77 disposed immediately above the endless belt 76, a motor 78 for driving the main roller 72 to rotate, and a frame 79 for supporting them. Yes. The magnetized material in the raw material 70 a conveyed by the conveyor 71 is attracted to the endless belt 76 by the magnetism generating means 77 and conveyed outside the conveyor 71.

JP-A-8-1039 (FIG. 2)

However, when a thin iron plate or steel material is mixed in the raw material 70a, these iron plates or steel materials (hereinafter simply referred to as “flat iron plates”) are generally placed on the conveyor 71 with a flat surface down. When necessary raw materials made of a non-magnetic material are placed on the flat iron plate, these raw materials are adsorbed to the endless belt 76 while being placed on the flat iron plate. Therefore, the conventional magnetic separator 70 has a problem that the separation efficiency between the raw material and the magnetic deposit is poor.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a drum-type magnetic separation device in which the separation efficiency of magnetic deposits in the processing raw material is remarkably improved.

The drum type magnetic separation apparatus according to the present invention that meets the above-mentioned object is a conveyor that gradually conveys a processing raw material,
The magnetized material in the processing raw material conveyed from the conveyor is adsorbed on the magnetic surface side on one side where the permanent magnet group is arranged close to the inside, and gradually conveyed to the non-magnetic surface side on the other side. A first magnetic sorting rotary drum;
The magnetized material, which is provided adjacent to the first magnetic sorting rotary drum with a gap and is transported to the non-magnetic surface side by the first magnetic sorting rotary drum, is brought close to the inside to be a permanent magnet. A second magnetic sorting rotary drum that is attracted on one magnetic surface side where the group is arranged and gradually conveyed to the other non-magnetic surface side;
A stand for supporting these is provided.
As a result, when the processing raw material adsorbed on the first magnetic sorting rotary drum with the non-magnetic material placed on the magnetic deposit is adsorbed by the second magnetic sorting rotary drum, the magnetic deposit is first adsorbed. Since the non-magnetic material is released from the entrainment by the magnetic material, the non-magnetic material easily falls and is separated from the magnetic material.

Further , the first and second magnetic force sorting rotary drums include a fixed shaft fixed to the mount via a bearing, and a rotating cylinder made of a nonmagnetic material that is concentrically attached to the fixed shaft, The permanent magnet group fixed to the fixed shaft inside one side of the rotating cylinder,
The permanent magnet group is disposed at a position at which the magnetized material is attracted and a position downstream of the main magnet group and before the top of the rotating cylinder, and is more magnetic than the main magnet group. And a weak auxiliary magnet group . As a result, the suction and transfer of the magnetic deposits are performed smoothly. When the magnetic material is adsorbed by the first magnetic sorting rotary drum, the non-magnetic material is entrained, that is, the magnetic material is covered on the non-magnetic material, and is attracted to the first magnetic sorting rotary drum. When this magnetic attachment is attracted to the second magnetic sorting rotary drum, the covered magnetic attachment is first attracted to the second magnetic sorting rotary drum, so that the first magnetic sorting is performed. The magnetized material is peeled off from the rotating drum, and the non-magnetic material is separated and dropped without being adsorbed by the second magnetic sorting rotating drum.

In the drum type magnetic separation apparatus according to the present invention, the conveyor may be a vibration feeder. As a result, the processing raw material can be conveyed by a certain amount, and the alignment of the processing raw material and the separation of the magnetized material and the non-magnetic material are promoted by vibration.

In the drum type magnetic separation apparatus according to the present invention, a protrusion (for example, a linear shape) that smoothly conveys the magnetic deposit is provided around the first and second magnetic separation rotary drums. It is good to have.
The height of the protrusion may be, for example, about 5 to 50 mm. If the height of the protrusion is excessively large, the distance between the conveyor and the first magnetic sorting rotary drum, the first and second magnetic sorting rotations. The distance between the drums increases and the magnetic attractive force decreases. On the other hand, if the height of the protrusion is excessively low, the force for forcibly conveying the magnetic deposit is weakened.

The drum-type magnetic sorting device according to claims 1 to 3 uses the first magnetic sorting rotary drum and the second magnetic sorting rotary drum in series, and is therefore caught by the first magnetic sorting rotary drum. The non-magnetic material can also be removed smoothly when the magnetized material is attracted to the second magnetic force sorting rotary drum. Therefore, the magnetic deposit can be efficiently separated from the processing raw material.

Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
Here, FIG. 1 is a side view of a drum type magnetic sorting apparatus according to an embodiment of the present invention, FIG. 2 is a plan view of the drum type magnetic sorting apparatus, and FIG. 3 is a first view of the drum type magnetic sorting apparatus. FIG. 4 is a cross-sectional view of the first and second magnetic force sorting rotary drums.

As shown in FIG. 1, a drum type magnetic separation device 10 according to an embodiment of the present invention includes first and second magnetic separation rotary drums 11 and 12 arranged in parallel at predetermined intervals, and a lower position. A vibration feeder 13 that is an example of a conveyor that supplies processing raw materials (press scraps in this embodiment) toward the arranged first magnetic sorting rotary drum 11 and a steel mount 14 on which these are mounted. Have. These will be described in detail below.

First, the first magnetic sorting rotary drum 11 shown in FIGS. 3 and 4 (the same applies to the second magnetic sorting rotary drum 12) will be described.
The first magnetic force sorting rotary drum 11 is supported by bearings 15 and 16 at both ends, and is rotated through bearings 18 and 19 concentrically with the fixed shaft 17 and a central fixed shaft 17 that is always held at a predetermined angular position. A rotating cylinder 20 that is freely attached and a permanent magnet group 21 that is adjacent to the inner wall of the rotating cylinder 20 with a gap and is fixedly attached to one half of the fixed shaft 17 are provided.
The bearings 15 and 16 are fixed to the gantry 14, a fixed shaft 17 protrudes from one of the bearings 16, and a worm wheel 22 is provided at an end portion of the protruding fixed shaft 17. The worm wheel 22 meshes with the worm 23, and both ends of the worm 23 are rotatably supported by auxiliary bearings 24 and 24 a fixedly attached to the bearing 16 (or the gantry 14), and by rotating the worm 23, The mounting angle of the fixed shaft 17 can be gradually changed, and when the worm 23 is not rotated, the worm 23 is engaged with the worm wheel 22 to lock the fixed shaft 17.

Ring-shaped housings 25 and 26 are provided inside the bearings 15 and 16 of the fixed shaft 17 via bearings 18 and 19, and side plates 29 having peripheral plates 27 and 28 around the housings 25 and 26. 30 are respectively screwed with a plurality of bolts 31. The rotating cylinder 20 is screwed to the short cylindrical edge plates 27 and 28 of the side plate members 29 and 30 with a plurality of bolts 32.
One end of a cylindrical support member 33 is screwed to the outside of the side plate member 30 by a plurality of bolts 34, and a sprocket 35 is screwed to the other end of the cylindrical support member 33 by a plurality of bolts 36. Further, a cover member 33a is screwed to the outside of the side plate member 29 by a bolt 34a.
The rotating cylinder 20 is made of a nonmagnetic material, such as austenitic stainless steel, so that magnetism generated from the internal permanent magnet group 21 can smoothly pass through the rotating cylinder 20. The side plate member is preferably austenitic stainless steel, but may be an iron plate.

As shown in FIG. 4, the permanent magnet group 21 of the first and second magnetic force sorting rotary drums 11 and 12 has a main magnet group 37 and three auxiliary magnet groups 38 to 40, which are iron support members. It is fixed to the fixed shaft 17 via 41. In the main magnet group 37, a plurality of plate-like permanent magnets 42 are arranged in series with the fixed shaft 17 as an axis and facing outward in the radial direction. A narrow permanent magnet 43 is placed on the outermost side of the permanent magnet 42, and an iron plate 44 forming a mounting seat is provided on the innermost side. The position of the main magnet group 37 in the first and second magnetic force sorting rotary drums 11 and 12 has a cross-sectional angle of 200 to 260 degrees (expressed as an angular position with respect to the rotation direction with the top being 0 degrees, the same applies hereinafter). It has become. The auxiliary magnet groups 38 to 40 each have a plurality of plate-like permanent magnets 45 arranged in series, and an iron plate 46 that forms a mounting seat is provided on the innermost side. The cross-sectional angle position for attaching the auxiliary magnet groups 38 to 40 is preferably 270 to 360 degrees (more preferably, 280 to 340 degrees).
The clearance between the radial front portions of the main magnet group 37 and the auxiliary magnet groups 38 to 40 and the inner surface of the rotary cylinder 20 is about 2 to 5 mm, so that the rotary cylinder 20 rotates smoothly. ing.

In this embodiment, ferrite-based permanent magnets are used for the main magnet group 37 and the auxiliary magnet groups 38 to 40, and the outer surface of the rotary cylinder 20 where the main magnet group 37 is located is about 2500 to 4000 Gauss. Thus, the outer surface of the rotating cylinder 20 where the auxiliary magnet groups 38 to 40 are located becomes 1000 to 2000 Gauss, and the outer surface of the rotating cylinder 20 where the main magnet group 37 is positioned is closer to the auxiliary magnet groups 38 to 40. The magnetic flux density is larger than the outer surface of the rotary cylinder 20 positioned.
In this way, as shown in FIG. 4, the magnetic surface side is formed in the left half (that is, one side) of the first and second magnetic force sorting rotary drums 11 and 12, and the first and second magnetic force sorting is performed. A non-magnetic surface side is formed on the right half (that is, the other side) of the rotating drums 11 and 12.

As shown in FIGS. 1 and 2, the first and second magnetic sorting rotary drums 11, 12 are provided by changing the horizontal position and the height position thereof, and the first magnetic sorting rotary drum 11 is provided with a vibration feeder 13. Is arranged at a position where a strong magnetic field from the main magnet group 37 of the first magnetic sorting rotary drum 11 acts on the raw material immediately before being discharged from the vibration feeder 13.
Further, the second magnetic sorting rotary drum 12 has a position where the magnetic deposit attracted by the first magnetic sorting rotary drum 11 reaches the non-magnetic surface side and tries to slide down from the surface of the rotary cylinder 20 (that is, The tangent is in the vicinity of the angle of repose of the magnetic deposit), and is disposed at a position where a strong magnetic field from the main magnet group 37 of the second magnetic sorting rotary drum 12 acts.
In this embodiment, the diameters of the first and second magnetic force sorting rotary drums 11 and 12 are about 500 to 1500 mm, and the gap between the first and second magnetic force sorting rotary drums 11 and 12 is adjustable and 100. It is set to about ~ 500 mm. Moreover, like the 2nd magnetic sorting rotary drum 12 shown with the dashed-two dotted line of FIG. 1, the 1st, 2nd magnetic sorting rotary drums 11 and 12 are attached so that the attachment position can be adjusted in the horizontal direction, The distance between the tips of the first magnetic sorting rotary drum 11 and the vibration feeder 13 and the distance between the first and second magnetic sorting rotary drums 11 and 12 can be adjusted.

Motors 49 and 50 are provided on the gantry 14 and are connected by a chain (not shown) to rotate the first and second magnetic force sorting rotary drums 11 and 12 at about 8 to 32 rpm. This is because if the rotation of the magnetic sorting rotary drums 11 and 12 is accelerated, the magnetic deposits and the like are scattered by centrifugal force, and if the rotation speed is low, the processing efficiency decreases.
The gantry 14 has a hopper 51 that receives the processing raw material discharged from the vibration feeder 13 and a non-magnetic material in the processing raw material discharged downward from the first magnetic sorting rotary drum 11, and the second magnetic sorting rotary drum 12. A hopper 52 is provided to receive the magnetic deposits collected from the hopper. In addition, a cover 53 is provided around the first and second magnetic force sorting rotary drums 11 and 12 to prevent the generated dust from being scattered around, and the cover 53 is provided with an inspection hole (not shown). It has been.
In this embodiment, there is a first magnetic sorting rotary drum 11 at a position above the vibration feeder 13 and a second magnetic sorting rotary drum 12 at an upper position, and a work table for checking these. 54 and 55 are provided on the side of the gantry 14, and the work tables 54 and 55 are provided with stairs 56 and 57, respectively. In FIG. 4, HL indicates a horizontal line, and in FIG. 1, 61 indicates a vibration motor. Further, 59 and 60 in FIG. 1 are containers for storing processing raw materials recovered from the hoppers 51 and 52, respectively.

Next, the operation of the drum type magnetic sorting apparatus 10 according to the present embodiment will be described. When the vibration feeder 13 is driven in a state where the first and second magnetic force sorting rotary drums 11 and 12 are rotated and the processing raw material is put into the vibration feeder 13, the particles and pieces in the processing raw material are removed by the vibration feeder 13. It is further individualized and gradually moves toward the trough tip direction of the vibration feeder 13. A first magnetic force sorting rotary drum 11 is provided at the upper position on the tip side of the vibration feeder 13.
The rotary cylinder 20 that is an outer cylinder forming the first magnetic sorting rotary drum 11 is rotationally driven by a motor 49, but the internal permanent magnet group 21 is fixedly arranged. The permanent magnet group 21 includes a main magnet group 37 having a relatively strong magnetic force, and auxiliary magnet groups 38 to 40 having a weaker magnetic force than the main magnet group 37. The main magnet group 37 is located at the top position in FIG. , 0 o'clock position) as a reference, it is provided at an angle position of 200 to 260 degrees in the clockwise direction, so that the magnetized material M in the processing raw material is adsorbed by the main magnet group 37. On the other hand, the non-magnetic material N in the processing raw material is gravity dropped downward from the tip of the vibration feeder 13 as it is.

On the other hand, since the linear protrusion 20a which is an example of a protrusion is provided around the rotary cylinder 20, the magnetic article M is smoothly conveyed in the clockwise direction, that is, on the rotary cylinder 20. Auxiliary magnet groups 38 to 40 are provided on the downstream side of the main magnet group 37, and the auxiliary magnet groups 38 to 40 are located at positions near the top (for example, from the position where the magnetic force of the main magnet group 37 is reduced). , 320 to 350 degrees position), the magnetic material M can be transported to the downward gradient angle position beyond the top position of the rotating cylinder 20 without falling off the surface of the rotating cylinder 20.
Since the second magnetic force sorting rotary drum 12 is disposed at the downward gradient angle position (10 to 50 degree angle position) with a slight gap (for example, 50 to 200 mm), the first magnetic force The magnetic deposit M conveyed by the sorting rotary drum 11 is further adsorbed by the second magnetic sorting rotary drum 12. Since the structure of the second magnetic sorting rotary drum 12 is substantially the same as that of the first magnetic sorting rotary drum 11, the second magnetic sorting rotary drum 11 is based on the principle that the first magnetic sorting rotary drum 11 adsorbs the magnetic deposit M. The sorting rotary drum 12 adsorbs the magnetic deposit M.

In addition, the selection efficiency of the magnetic deposit M is further improved by providing the second magnetic force sorting rotary drum 12. The reason is, for example, that when a magnetic material M made of a flat iron plate or the like as shown in the partially enlarged view of FIG. 4 is present in the processing raw material, it is attracted to the first magnetic sorting rotary drum 11 from the vibration feeder 13. In addition, the non-magnetic material N is squeezed into the second magnetic sorting rotary drum 12 as it is. In this case, the second magnetic sorting rotary drum 12 adsorbs the magnetic material M placed on the rotating cylinder 20, but the non-magnetic material N is in a lower position with respect to the magnetic material M. The non-magnetic material N is not adsorbed when the magnetic material M of the sorting rotary drum 12 is adsorbed. The non-magnetic material N that has not been attracted to the second magnetic sorting rotary drum 12 falls from the first magnetic sorting rotary drum 11 as it is, and falls into the hopper 51.
On the other hand, the magnetic deposit M attracted to the second magnetic sorting rotary drum 12 is conveyed by the rotation of the second magnetic sorting rotary drum 12 and falls into the hopper 52.

Although the embodiment has been described using specific numbers, the present invention is not limited to these numbers, and is a numerical change and a form change within a range that does not change the gist of the present invention. The present invention also applies. For example, the rotational speed of the first and second magnetic force sorting rotary drums 11 and 12 is 8 to 32 rpm, but may be slower or faster. In order to increase the speed, it is a condition that the magnetic deposit M does not scatter due to centrifugal force.
Further, in this embodiment, a two-stage magnetic sorting rotary drum is used, but a multi-stage magnetic sorting rotary drum can also be used.
Furthermore, in this embodiment, the main magnet group 37 is composed of permanent magnets, but may be an electromagnet.

It is a side view of the drum type magnetic sorting apparatus concerning one embodiment of the present invention. It is a top view of the drum type magnetic separation apparatus. It is a longitudinal cross-sectional view of the 1st (2nd) magnetic selection rotary drum of the drum type magnetic selection apparatus. It is a cross-sectional view of the first and second magnetic force sorting rotary drum. It is explanatory drawing of the conventional magnetic separator.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10: Drum-type magnetic sorting apparatus, 11: 1st magnetic sorting rotary drum, 12: 2nd magnetic sorting rotary drum, 13: Vibrating feeder, 14: Mount, 15, 16: Bearing, 17: Fixed shaft, 18, 19: bearing, 20: rotating cylinder, 20a: linear projection, 21: permanent magnet group, 22: worm wheel, 23: worm, 24, 24a: auxiliary bearing, 25, 26: housing, 27, 28: edge plate, 29, 30: Side plate member, 31, 32: Bolt, 33: Cylindrical support material, 33a: Cover member, 34, 34a: Bolt, 35: Sprocket, 36: Bolt, 37: Main magnet group, 38-40: Auxiliary Magnet group, 41: support member, 42, 43: permanent magnet, 44: iron plate, 45: permanent magnet, 46: iron plate, 49, 50: motor, 51, 52: hopper, 53: cover, 54, 55: workbench 5 , 57: Stairs, 59, 60: container, 61: vibration motor

Claims (3)

A conveyor that gradually conveys the processing raw material;
The magnetized material in the processing raw material conveyed from the conveyor is adsorbed on the magnetic surface side on one side where the permanent magnet group is arranged close to the inside, and gradually conveyed to the non-magnetic surface side on the other side. A first magnetic sorting rotary drum;
The magnetized material, which is provided adjacent to the first magnetic sorting rotary drum with a gap and is transported to the non-magnetic surface side by the first magnetic sorting rotary drum, is brought close to the inside to be a permanent magnet. A second magnetic sorting rotary drum that is attracted on one magnetic surface side where the group is arranged and gradually conveyed to the other non-magnetic surface side;
A drum type magnetic separation device including a gantry for supporting these ,
The first and second magnetic force sorting rotary drums include a fixed shaft fixed to the mount via a bearing, a rotating cylinder made of a non-magnetic material that is concentrically attached to the fixed shaft, and the rotation Each having a group of permanent magnets fixed to the fixed shaft inside one side of the cylinder,
The permanent magnet group is disposed at a position at which the magnetized material is attracted and a position downstream of the main magnet group and before the top of the rotating cylinder, and is more magnetic than the main magnet group. A drum-type magnetic force sorting apparatus characterized by having a weak auxiliary magnet group . In the drum-type magnetic separator apparatus according to claim 1 Symbol mounting, a drum-type magnetic separation apparatus, wherein the conveyor is a vibrating feeder. 3. The drum-type magnetic separation device according to claim 1, wherein a protrusion that smoothly conveys the magnetic attachment is provided around each of the first and second magnetic separation rotary drums. A drum-type magnetic separation device characterized by that.

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