JPH06218298A - Magnetic screening method and magnetic screening machine - Google Patents

Abstract

PURPOSE:To easily and completely remove magnetic materials mixed into powder by disposing a suction means in a guide pipe having a collar, moving the suction means together with the guide pipe and moving the suction means so as to cross the collar of the guide pipe. CONSTITUTION:The guide pipe 25 which has the collar 26 on the outside surface and is internally and freely movably equipped with magnets 41 is disposed across powder falling passages 1, 2. The magnets 41 are moved to the guide pipe 25 of the part crossing the powder passages 1, 2 to drop the powder and to attract the magnetic materials mixed into the powder on the surface of the guide pipe 25. The guide pipe 25 is thereafter moved to outside the powder passages 1, 2 and the magnets 41 are moved in the direction crossing the collar 26 of the guide pipe 25. The magnetic materials attracted to the surface of e guide pipe 25 are then peeled and dropped.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic separation method and a magnetic separator for removing a magnetic substance mixed in powder.

[0002]

2. Description of the Related Art Conventionally, in order to remove the magnetic substance mixed in the powder, the powder passage is branched into an inverted Y shape at the upper part,
A magnetic separator has been used in which the branched passages are integrated into a Y-shape at the lower part, and each of the intermediate passages is traversed, and a suction device made of a magnetic material is arranged. In this magnetic separator, when the powder is being dropped into the first passage, the second passage
Of the suction device in the passage, remove the magnetic substance adsorbed on the surface by squeezing the surface of the suction device, return the suction device from which the magnetic substance has been removed into the second passage, and after a certain period of time, pass the powder passage. Was switched to the second passage, and this time the work of pulling out the suction tool in the first passage and removing the magnetic material was repeated.

[0003]

SUMMARY OF THE INVENTION In the above-mentioned conventional magnetic separation method, it is necessary to pull out many suction tools one by one, manually squeeze the surface of the suction tool one by one, and return the suction tool after squeezing to the original one. Since the removed magnetic substance adheres to the surface of the glove, the magnetic substance cannot always be removed sufficiently, and there is a problem that the workability of the magnetic separation work is remarkably poor. Therefore, an object of the present invention is to provide a magnetic separation method and a magnetic separation device that can easily and completely remove a magnetic substance mixed in powder.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above object, that is, one or a plurality of guide tubes having a collar on the outer surface and movably incorporating magnets In the step of arranging the body across the falling passage, and in the state where the magnet is moved to the guide tube in the portion traversing the passage of the powder,
Dropping the powder to adsorb the magnetic substance mixed in the powder onto the surface of the guide tube; moving the guide tube to the outside of the powder passage along with the magnet in the guide tube; and the collar of the guide tube. A step of moving the magnet in a direction traversing the magnet to separate and drop the magnetic substance adsorbed on the surface of the guide tube, and a first crossing intersecting with a powder falling path. And a frame body fixed to the frame body, extending in a second intersecting direction that is the same as or different from the first intersecting direction intersecting the powder drop passage, and has a collar on the outer surface. Or a magnetic separator having a plurality of guide tubes and a magnet movably mounted in each guide tube, and an outer frame movably arranged in a direction connecting two powder drop passages, It is fixed in the outer frame, extends in the moving direction of the outer frame, and has a central portion in the longitudinal direction. A plurality of guide tubes each having a flange on the outer surface, and a guide tube extending from one end side to the other end side of the flange of the guide tube so as to be movable in the longitudinal direction of the guide tube. An inner frame to which a body or a moving magnet is attached, and each guide tube is internally provided with a magnet for attraction in the center, and a moving magnet or a ferromagnetic material is provided at both ends facing the sliding portion of the outer frame. And a suction device that has the magnetic separator.

[0005]

When the magnet is moved to the portion of the guide tube that traverses the powder passage and the powder is dropped, the magnetic substance mixed in the powder is adsorbed on the surface of the guide tube. After dropping the powder for a certain period of time and stopping the dropping, and moving the guide tube together with the magnet inside the guide tube to the outside of the powder passage, the magnetic substance adsorbed on the surface of the guide tube was also adsorbed on the surface of the guide tube. Move along with the guide tube. Next, when only the magnet is moved in a direction that traverses the brim attached to the surface of the guide tube, the magnetic material that cannot follow the movement of the magnet is separated from the surface of the guide tube and falls after the magnet has moved. Further, the magnetic body that follows the movement of the magnet is attracted to the magnet and moves on the surface of the guide tube, but after reaching the flange on the surface of the guide tube, it is no longer possible to follow the movement of the magnet, and therefore the magnet cannot move. After crossing the brim, all the magnetic material is separated from the surface of the guide tube and falls. Since the place where the powder falls is outside the passage of the powder, the magnetic substance mixed in the powder is removed in this way.

[0006]

The present invention will be described with reference to the drawings. 1 to 3 show an embodiment of the present invention. A passage through which falling powder passes is divided into a left passage 1 and a right passage 2 in an inverted Y shape at the upper portion. Is integrated in a Y shape at the bottom. The frame 10 of the magnetic separator according to the present invention is interposed horizontally between the passages 1 and 2 so as to connect the passages 1 and 2. That is, the upper surface of the left end of the frame 10 is connected to the raw material inlet 1a of the left passage, and the lower surface of the left end is connected to the raw material discharge chute 1b of the left passage. Similarly, the upper surface of the right end of the frame 10 is connected to the raw material inlet 2a of the right passage, and the lower surface of the right end is the raw material discharge chute 2b of the right passage.
Connected to. An inspection port 3a is formed on the upper surface of the central portion of the frame 10, and the lower surface of the central portion is connected to the magnetic material discharge chute 3b.

Rails 11 extending in the left-right direction are provided in the frame 10 in the vertical and front-rear directions.
The outer frame 20 is supported by 1 so as to be movable in the left-right direction. A screw 21 extending in the left-right direction is rotatably supported at an intermediate portion in the height direction between the front portion 10a of the frame and the outer frame 20, and the screw 21 is arranged outside the right portion 10b of the frame. It is rotationally driven by the outer frame moving motor 22. A nut 23 fixed to the outer frame 20 is screwed onto the screw 21, and the outer frame 20 is configured to move left and right when the outer frame moving motor 22 is rotationally driven. The outer surface of the screw 21 is dustproofed by the bellows 24, and the length of the outer frame 20 in the left-right direction is formed to be substantially equal to the center-to-center distance between the passages 1 and 2. Proximity sensors 12a and 12b are fixed to the left end and the right end of the inner surface of the front portion 10a of the frame 10, respectively. The outer frame at the left end The left end proximity sensor 12a is an outer frame when the outer frame 20 moves to the left end. Of the outer frame 20 at the right end and the right end proximity sensor 12b detects the outer frame 20
Is arranged so as to detect the right portion 20b of the outer frame when is moved to the right end.

Inside the outer frame 20, there are two guide tubes 25 formed of a non-magnetic material and extending in the left-right direction.
7 pieces are fixed for the sake of convenience of the book and 2 pieces of the lower tier, and the middle tier 3 is filled so as to fill the plane section when seen through from above and below.
The book guide tubes 25 are arranged so as to be displaced in the front-rear direction.
Further, the lower ends of the raw material inlets 1a and 2a are squeezed so that the powder falls into the flat cross section of the guide tube 25 when seen through from above and below. Is configured to contact. Guide tube 2
A collar 26 is fixed at the center of the longitudinal direction of the No. 5.

Rails 27 extending in the left-right direction are provided in front of and behind the lower end of the outer frame 20, and an inner frame 30 is mounted on the rail 27 so as to be movable in the left-right direction. In the middle portion in the height direction between the rear portion 20c of the outer frame and the inner frame 30,
A screw 31 extending in the left-right direction is rotatably supported, and the screw 31 is rotationally driven by an inner frame moving motor 32 arranged outside the right portion 20b of the outer frame. The screw 31 has a nut 33 fixed to the inner frame 30.
Are screwed together, and the inner frame 30 is configured to move to the left and right when the inner frame moving motor 32 is rotationally driven. The outer surface of the screw 31 is dust-proofed by the bellows 34, and the length of the inner frame 30 in the left-right direction is approximately half the length of the outer frame 20 in the left-right direction, that is, the magnetic material is discharged from the centers of the passages 1 and 2. The distance to the center of the chute 3b is formed to be almost equal. Therefore, the right portion of the inner frame 30 slides with the guide tube 25 on the right side of the flange 26 fixed to the guide tube of the outer frame, and similarly, the left portion of the inner frame 30 is larger than the flange 26 of the outer frame. It slides on the left guide tube 25. A tubular sliding portion 35 is formed on the inner frame 30 that slides on the guide tube 25, and the sliding portion 35 is made of a ferromagnetic material. Proximity sensors 28a and 28b are respectively fixed to the left end and the right end of the inner surface of the rear portion 20c of the outer frame, and the inner frame left end proximity sensor 28a at the left end is the inner frame 3
0 detects the left part of the inner frame when it moves to the left end, and the inner frame right end proximity sensor 28b at the right end is arranged so as to detect the right part of the inner frame when the inner frame 30 moves to the right end. There is. In addition, the outer frame 20 and the inner frame 30 both accommodate the inner frame moving motor 32 when they are moved to the right end.
A case 13 is fixed to the right portion 10b of the.

A suction tool 40 is installed in each guide tube, and a plurality of suction magnets 41 are enclosed in the central portion of the suction tool 40 as shown in FIG. Each suction magnet 4
No. 1 is arranged so that the end portions of the adjacent suction magnets 41 have the same polarity so that the magnetic force lines are emitted to the large diameter side of the suction tool 40. A moving magnet 43a is enclosed at the left end of the suction tool 40 via a non-magnetic body 42a, and similarly, a non-magnetic body 42b is provided at the right end of the suction tool 40.
A moving magnet 43b is enclosed through the above, and these moving magnets 43a and 43b are respectively attached to the sliding portion 3 of the outer frame.
It faces 5,35.

This embodiment is constructed as described above,
The method of using this magnetic separator will be described below. First, as shown in FIG. 2, when the outer frame moving motor 22 is rotationally driven to move the outer frame 20 to the left end until the outer frame left end proximity sensor 12a operates, the guide tube 25 causes the left passage 1 and the magnetic material discharge chute 3 to move.
The collar 26 reaches the position where it covers with b and the magnetic material discharge chute 3
It reaches the inside of the left end of b. Further, the inner frame left edge proximity sensor 28a
When the inner frame moving motor 32 is rotationally driven until the inner frame 30 also moves, the inner frame 30 also moves to the left end, and the suction magnet 41 of the suction tool in the guide tube 25 reaches a position covering the raw material inlet 1a of the left passage. In this state, when the switching damper 4 is set to the left passage side, the shut-off damper 5 is opened, and the powder is put into the left passage 1, the magnetic substance mixed in the powder is guided by the guide tube 25 at the portion where the attraction magnet 41 is located. Adsorb on the surface of.

Then, after a lapse of a certain time, the shut-off damper 5 is closed to stop feeding the powder into the left passage 1, and as shown in FIG. 5, the inner frame moving motor 32 is stopped and the outer frame right end proximity sensor 12b is kept. The outer frame 20 is moved to the right end until is activated. As a result, each member such as the guide tube 25 fixed to the outer frame 20, each member such as the inner frame 30 mounted on the outer frame 20, and the suction tool 40 that moves together with the inner frame 30 are all the outer frame 2
The outer frame 20 moves to the right with the movement of the outer frame 20 while maintaining the relative positional relationship with 0. Therefore, the magnetic substance adsorbed on the surface of the guide tube 25 is also adsorbed on the surface of the guide tube 25, and
Move with 5. In this way, the outer frame right edge proximity sensor 12
When b is operated, the guide tube 25 reaches the position where it covers the right passage 2 and the magnetic material discharge chute 3b, and the collar 26 reaches the inside of the right end of the magnetic material discharge chute 3b for sucking the suction tool in the guide tube 25. The magnet 41 reaches the position where it is covered by the magnetic material discharge chute 3b.

Next, as shown in FIG. 6, the outer frame moving motor 2
2 is stopped, the inner frame 30 is moved to the right end until the inner frame right end proximity sensor 28b is activated. As a result, the sliding portion 35 of the inner frame moves to the right while the guide tube 25 and the brim 26 fixed thereto are not moved, and the moving magnet 43 of the suction tool is magnetically coupled to the sliding portion 35. Therefore, the suction tool 40 also moves to the right. At this time, among the magnetic substances adsorbed on the surface of the guide tube 25 at the portion where the suction magnet 41 of the suction tool is located, the magnetic substance that cannot follow the movement of the suction magnet 41 is left after the suction magnet 41 has passed through. Non-magnetic material 42
When the portion "a" reaches, it peels off from the surface of the guide tube 25 and falls. Further, the magnetic body following the movement of the attraction magnet 41 is attracted to the attraction magnet 41 and moves to the right on the surface of the guide tube 25, but reaches the collar 26 stopped inside the right end of the magnetic material discharge chute 3b. After that, it is no longer possible to follow the movement of the attraction magnet 41, and when the attraction magnet 41 has finished passing and the left non-magnetic body 42a portion has passed, it peels off from the surface of the guide tube 25. To fall. After the attraction magnet 41 has finished crossing the brim 26,
All the magnetic substances are separated from the surface of the guide tube 25 and fall on the magnetic substance discharge chute 3b to be removed. On the other hand, when the inner frame right end proximity sensor 28b is activated, the suction magnet 41 of the suction tool in the guide tube 25 reaches a position covering the raw material inlet 2a of the right passage. Therefore, in this state, when the switching damper 4 is set to the right passage side, the shut-off damper 5 is opened, and the powder is put into the right passage 1, the magnetic substance mixed in the powder is guided to the portion of the guide tube where the attraction magnet 41 is located. Adsorb on the surface of 25.

Then, after a lapse of a certain time, the shut-off damper 5 is closed to stop the feeding of the powder into the right passage 1, and as shown in FIG. 7, the inner frame moving motor 32 is stopped and the outer frame left end proximity sensor 12a is kept. The outer frame 20 is moved to the left end until is activated. As a result, the suction tool 40 moves to the left along with the guide tube 25, and the magnetic substance adsorbed on the surface of the guide tube 25 also moves while adsorbed. Then, as shown in FIG. 2, the outer frame moving motor 22 is stopped and the inner frame 30 is moved to the right end until the inner frame left end proximity sensor 28a is activated. As a result, the guide tube 25 and the collar 26 do not move, the sliding portion 35 of the inner frame moves to the right side, the suction tool 40 also moves to the right side, and after the attraction magnet 41 has finished traversing the collar 26 portion, all Of the magnetic material is separated from the surface of the guide tube 25 and the magnetic material discharge chute 3
fall to b. By repeating the above process, the magnetic substance mixed in the powder can be easily and completely removed.

Since the present invention is applied in place of the existing magnetic separator shown in the prior art in this embodiment, the powder falling passage is branched into the left passage 1 and the right passage 2. The case was shown. However, for example, when newly installed, the present invention can be applied without branching the powder passage. 1
To apply the present invention in the case of having only one passage, for example, the left passage 1 of this embodiment is used as the one passage,
The connection to the right aisle may be closed. Alternatively, at the positions of the inspection port 3a and the magnetic material discharge chute 3b of this embodiment,
It is also possible to connect the individual passages and connect the magnetic material discharge chute to the position of the left passage or the right passage of this embodiment.

Further, in this embodiment, the guide tube 25 is fixed in the moving direction of the outer frame 20, so that the moving direction of the outer frame 20 and the moving direction of the inner frame 30 coincide with each other. However, the fixing direction of the guide tube 25, that is, the moving direction of the inner frame 30 does not necessarily have to match the moving direction of the outer frame 20. In this embodiment, the sliding portion 35 of the inner frame is made of a ferromagnetic material, and the moving magnets 43a and 43b are arranged at both ends of the suction tool 40. However, using a magnet for the sliding portion 35 of the inner frame,
Ferromagnetic materials can be used at both ends of 0, or magnets can be used for both. In the present embodiment, the movement of the suction tool 40 is indirectly performed by using the magnetic action, but the method of moving the suction tool 40 does not cause any particular problem. For example, one end or both ends of the suction tool can be made to project from the side portion of the inner frame, this can be joined by a flat plate, etc., and this flat plate can be moved.

[0017]

According to the present invention, the suction tool is arranged in the guide tube having the flange, the suction tool is moved together with the guide tube, and the suction tool is moved so as to cross the flange of the guide tube.
A magnetic separation method and a magnetic separator capable of easily and completely removing a magnetic substance mixed in powder.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of the present invention.

[Fig. 2] Similarly, a plane sectional view

[Figure 3] Similarly, left side view

FIG. 4 is a sectional view showing a suction tool of the same.

FIG. 5 is a plan sectional view showing the same after the outer frame is moved to the right.

FIG. 6 is a plan sectional view showing the inner frame after it has been moved to the right.

FIG. 7 is a plan sectional view showing the same after the outer frame is moved to the left.

[Explanation of symbols]

1 ... Left passage 2 ... Right passage 1
a, 2a ... Raw material input port 1b, 2b ... Raw material discharge chute 3a ... Inspection port 3
b ... magnetic material discharge chute 4 ... switching damper 5 ... shut-off damper 10 ... frame 10a ... front part 1
0b ... right part 11 ... rail 12a ... outer frame left end proximity sensor 12b ... outer frame right end proximity sensor 1
3 ... Case 20 ... Outer frame 20a ... Left part 2
0b ... right part 20c ... rear part 21 ... screw 2
2 ... Outer frame moving motor 23 ... Nut 24 ... Bellows 2
5 ... Guide tube 26 ... Tsuba 27 ... Rail 28a ... Inner frame left end proximity sensor 28b ... Inner frame right end proximity sensor 30 ... Inner frame 31 ... Screw 3
2 ... Inner frame moving motor 33 ... Nut 34 ... Bellows 3
5 ... Sliding part 40 ... Suction tool 41 ... Suction magnet 4
2a ... left non-magnetic body 42b ... right non-magnetic body 43a ... left moving magnet 4
3b ... Magnet for right movement

Claims (3)

[Claims] 1. A step of arranging one or a plurality of guide tubes each having a flange on the outer surface and movably incorporating a magnet so as to traverse a powder drop passage, and a guide for a portion traversing the powder passage. With the magnet moved to the tube, the step of dropping the powder and adsorbing the magnetic substance mixed in the powder onto the surface of the guide tube, and moving the guide tube together with the magnet in the guide tube to the outside of the powder passage. And a step of moving the magnet in a direction crossing the brim of the guide tube to separate and drop the magnetic substance adsorbed on the surface of the guide tube. 2. A frame body movably arranged in a first intersecting direction intersecting the powder falling passage, and the first intersecting direction fixed in the frame body and intersecting the powder falling passage. Extending in the same or different second cross direction,
A magnetic separator having one or a plurality of guide tubes having a flange on the outer surface and a magnet movably mounted in each guide tube. 3. An outer frame arranged so as to be movable in a direction connecting two powder drop passages, a fixed inside the outer frame, extending in the moving direction of the outer frame, A plurality of guide tubes having a flange on the outer surface, and a guide tube extending from one end side to the other end side of the flange, movably arranged in the longitudinal direction of the guide tube, and ferromagnetic in the sliding portion with each guide tube. A body or an inner frame to which a moving magnet is attached, each guide tube is internally provided with a magnet for attraction in the central portion, and a moving magnet or a ferromagnetic material is provided at both end portions facing the sliding portion of the outer frame. A magnetic separator having a suction tool having.