JPH0742508Y2 - Metal Fragment Separator - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention collects magnetic metal pieces mixed in a conveyed object on a belt conveyor from an object to be conveyed, and then separates and discharges only the magnetic metallic piece. Regarding the device.

[Conventional technology]

In general, various ores used as raw materials for charging blast furnaces and coke ovens and as raw materials for sinters contain magnetic metal fragments derived from the raw ore sampling piles and debris from the sampling or transport facilities. ing. If this magnetic metal piece is directly supplied to a furnace or a sintering machine, it is not suitable as a raw material, and if the conveyor belt is damaged due to being caught in the transfer chute before the supply, or if it is applied to a crusher, the crusher must be used. May cause damage. Therefore, it is necessary to remove the metal pieces in advance as much as possible.

For this reason, conventionally, the following devices have been devised to remove the magnetic metal pieces.

A magnet is installed near the upper part of the belt conveyor, and a magnetic metal piece detector is provided.Based on the detection signal of the magnetic metal piece by this, the magnetizing operation of the magnet is interlocked or the detector is not provided. A device that constantly excites a magnet to magnetically attract and remove magnetic metal pieces.

As disclosed in Japanese Patent Laid-Open No. 57-53244, a screen is provided so as to be able to go in and out of a powdery and agglomerate dropping path on a main chute provided at the discharge end of the belt conveyor, and on the upstream side of this screen. A device that is provided with a magnetic metal piece detection device, and when the detection signal from this detection device causes the magnetic metal piece to be removed, the screen is advanced to the drop path, and the magnetic metal piece is separated and removed by sieving with the screen.

[Problems to be solved by the device]

However, the above conventional device has the following drawbacks. That is, in the above apparatus, the magnetic metal piece is buried in the lower layer part of the powder or granular agglomerate layer on the belt conveyor, or the removal of the magnetic metal piece becomes difficult when the conveyance speed of the belt conveyor becomes higher than a predetermined value, Further, when the powder / agglomerate itself is a weak magnetic material, the magnetic powder and the magnetic powder / agglomerate to be conveyed are sucked together with the magnetic metal piece, and the subsequent separation process becomes complicated.

Further, in the above-mentioned apparatus, since the screen is sorted, the screen is worn and must be replaced frequently, and the screen tends to be blocked by a large metal piece or several metal pieces. This screen blockage may also cause headshot blockage. Therefore, it is necessary to periodically stop the belt conveyor and manually carry out the screen blockage removal work. For this reason, the conveyance operation rate of the belt conveyor is inevitably deteriorated.

On the other hand, the present applicant has previously proposed, as Japanese Patent Application No. 1-65495, a separation device that solves the above problems.

However, if the metal pieces accumulated inside the recovery hopper are left as they are, the inside of the recovery hopper will eventually be clogged, and the separability between the magnetic metal pieces and the powder or granular agglomerates will deteriorate.
Therefore, it is necessary to periodically remove and discharge the magnetic metal piece caught on the rod-shaped body, but if this work is performed manually, it takes a lot of time and labor, and the recovery hopper is as in the embodiment described later. Since it is installed at a high place, there is a risk of work.

Therefore, an object of the present invention is to reliably separate the magnetic metal piece from the object to be conveyed, and to easily or automatically discharge the separated magnetic metal piece from the magnetic body falling path, thereby improving maintainability.

[Means for Solving the Problem] The above-mentioned problem is to dispose a belt conveyor that conveys an object to be conveyed containing a magnetic material such as a magnetic metal piece and a magnetic metal powder agglomerate, and a conveyance process position of this belt conveyor. The detector of the metal piece and the conveyed object for separating the metal piece from the conveyed object and recovering the conveyed object at the exit portion or the intermediate portion of the belt conveyor based on the metal piece detection signal from the detector A collecting means, a collecting hopper which receives a magnetic material in the middle of its collecting path and has an inclined surface inclined with respect to the ground, and is integrated with the collecting hopper facing the magnetic material falling path and substantially orthogonal to the falling direction, And a plurality of metal piece separating rod-shaped bodies whose roots are close to or in contact with the inclined surface, the recovery hopper, at least the angle at which the metal piece caught on the metal piece separating rod-shaped body falls freely It is possible to solve this by making it possible to turn around the horizontal axis.

[Action]

In the present invention, the recovery hopper is not always exposed at the exit of the belt conveyor, but the separating device, for example, the magnetic separator is operated to separate the metal pieces only when the metal pieces are detected by the detector. Can be reduced.
Further, since the magnetic metal pieces are separated by the rod-shaped body instead of the wire net, and the rod-shaped body is provided on the inclined surface, the magnetic metal pieces and the powdery aggregates can be separated without clogging.

On the other hand, as described above, if the metal pieces accumulated in the collection hopper are left as they are, the inside of the collection hopper will eventually be clogged, and the separability between the magnetic metal pieces and the granular agglomerates will deteriorate. Therefore, it is necessary to periodically remove and discharge the magnetic metal piece caught on the rod-shaped body, but if this work is performed manually, it takes a lot of time and labor, and the recovery hopper is as in the embodiment described later. Since it is installed at a high place, there is a risk of work.

On the other hand, according to the present invention, the recovery hopper itself is regularly rotated around the horizontal axis to freely drop the magnetic material caught on the rod-shaped body for discharge processing, which enables labor saving. And you are free from the danger of work.

[Concrete configuration of device]

 Hereinafter, the configuration of the present invention will be specifically described with reference to the drawings.

In the present invention, for example, as shown in FIG. 5, in the process of transporting the raw material 2 cut out from the raw material tank 1 to the intended place by the belt conveyor 3, the magnetic metal pieces 4 mixed with the raw material 2
Is detected by, for example, the metal piece detector 5 on the outlet side of the raw material tank 1 of the belt conveyer 3, and based on this detection signal, the magnetic force sorter 6 sorts and discharges at the outlet of the belt conveyer 3.

As the metal piece detector 5, a device is generally used which measures the magnetic susceptibility of a conveyed object by a magnetic transmission coil and a reception coil and detects passage of a ferromagnetic material of a certain level or more.

As the sorter 6, for example, a belt type magnetic sorter can be used. As shown in FIG. 2 and FIG. 3, the magnetic separator 6 has a dedicated frame 8 additionally provided on the existing belt conveyor frame 7 and a magnetic separation belt 6A provided movably in the width direction of the belt conveyor 3. Can be configured by

On the other hand, a recovery hopper 9 is arranged below the outlet side of the belt conveyor 3 so as to face the recovery end of the belt 6A of the magnetic separator 6. From the inclined surface 9a of the recovery hopper 9,
Sorted product (that is, if the magnetic metal piece 4 or the raw material 2 also includes magnetic powder agglomerates)
The metal piece separating rod-shaped bodies 10, 10 ... Consisting of metal rods are integrated in a protruding state substantially orthogonal to the moving direction of the. In this case, the rod-shaped body 10 may be in contact with the inclined surface 9a and the other surface at both ends, or may be slightly separated (in the latter case, both sides should be fixed to the side surface of the recovery hopper 9). Good) Good. Further, below the position where the rod-shaped body 10 is disposed, the wire mesh 11
Are inclined. These rods 10 and wire mesh
Reference numeral 11 blocks the entire passage of the recovery hopper 9. further,
The material of the recovery hopper 9, the rod-shaped body 10 and the wire net 11 is preferably selected from non-magnetic materials. A storage hopper 12 is provided below the recovery hopper 9.

In the magnetic metal piece recovery device thus configured, the magnetic metal pieces are separated and discharged as follows.

That is, when the magnetic metal piece 4 reaches the exit portion of the belt conveyor 3, the sorter 6 is excited, the magnetic metal piece 4 is sucked, discharged to the recovery hopper 9, and further to the outside of the recovery hopper 9. Is discharged.

In the process in which the magnetic powder granules as the magnetic material and the magnetic metal pieces 4 according to the present invention discharged in this manner fall in the recovery hopper 9, the plate-shaped magnetic metal pieces 4 are usually rod-shaped bodies 10 groups. On the other hand, while most of the magnetic powder granules pass through the rod-shaped bodies 10 and the wire net 11, they are collected by the storage hopper 12 at the destination of conveyance, while the magnetic powder granules pass through the group of rods 10 and the wire net 11. At that time, when the metal piece 4 is a small piece, the magnetic metal piece 4 may pass through the rod-shaped body 10 group, but it is caught in the wire net 11 (such a mesh) and is surely a magnetic powder granule. Is separated into

On the other hand, in the process of continuing such separation operation for a long time, the amount or the degree of catching of the separated metal pieces 4 accumulated in the recovery hopper 9 is detected by the sensor,
When it is time to discharge, or when the time cycle set in advance by a timer etc. is reached,
As shown in FIG. 6, the hopper 9 is turned around a horizontal axis by a turning means 20 described later, and a recovery container installed at a metal piece falling position outside the hopper 9 through an upper end opening 9b of the hopper 9.
Emitted to 13.

The turning means 20 is as follows: (1) A recovery hopper 9 is rotatably supported on a drop chute or a frame by a horizontal rotating shaft 21, and the horizontal rotating shaft 21 is directly connected to the shaft of a speed reducer, for example, via a key. Then, a mode of turning by a motor,
(2) A rotating handle (not shown) at the end of the horizontal rotating shaft 21.
A mode in which the recovery hopper 9 is manually rotated by providing a
(3) As shown in FIG. 7, a mode in which the recovery hopper 9 is rotated via the arm 23 and the rotary shaft 21 by the expansion and contraction operation of the cylinder 22 attached to the ground by the trunnion method, (4)
As shown in FIG. 8, it is possible to adopt a mode in which the pinion 25 is meshed with the arc rack 24 integrated with the recovery hopper 9 and the recovery hopper 9 is rotated by rotation of the pinion 25 by a motor or the like.

In the above embodiment, the metal piece detector 5 and the magnetic force varying device mounting type (weak, strong excitation) magnetic separator 6 arranged at the discharge end of the belt conveyor 3 are interlocked with each other, and When the magnetic metal piece 4 detected by the detector 5 passes through the metal piece detector 5 and approaches the magnetic separator 6 to some extent, the magnetic separator 6 is weakly excited, and at the same time, the belt conveyor 3 is operated at high speed. When the magnetic metal piece 4 passes the magnetic separator 6 a few seconds after starting the low speed operation, the magnetic metal piece 4 is strongly excited, and the discharge processing to the recovery hopper 9 is surely performed.

At this time, the metal piece detector 5, the magnetic separator 6 and the belt conveyor 3
Is controlled via respective timers to discharge the magnetic metal piece 4 in a timely and reliable manner under the correlation between the distance between the metal piece detector 5 and the magnetic separator 6 and the speed of the belt conveyor 3.

If the magnetic metal piece 4 is detected by the metal piece detector 5 during one cycle operation from the operation of the metal piece detector 5 to the completion of discharge by the magnetic separator 6, the belt conveyor 3, the magnetic separation is performed on the spot. The machine 6 is stopped and restarted by the release signal, and at that time, the magnetic separator 6 is made to operate with the highest priority, and the operation of the above 1 cycle is electrically stored in a timer, a memory counter or the like. Every other cycle, it is preferable to perform control so that the processing can be completely performed until after one cycle time (until the magnetic metal piece 4 is lost).

Since the device of the present invention attracts and discharges the magnetic metal piece 4 by magnetic force, the recovery hopper 9, the rod-shaped body 10, the wire net 11 and the carrier roller of the belt conveyor 3 are magnetized by the magnetic separator 6, so that a non-magnetic material is used. It is preferable to form the metal or non-magnetic material.

The "collection hopper for receiving the recovered magnetic material" referred to in the present invention means, on the delivery side of the belt conveyor 3, a movable hopper capable of advancing and retreating to the discharge port to take out a conveyed product containing metal pieces to another line, By continuously providing the movable hopper with the recovery hopper of the above example, it is also possible to separate and recover only the magnetic metal piece 4 while returning the powder / aggregate to the normal line as it is.

Further, as a matter of course, the metal piece detector 5 and the collecting device may be provided with the detector 5 on the upstream side in the conveying direction of the belt conveyor 3 and the collecting device on the downstream side, and the installation position is near the entrance side of the belt conveyor 3. But it's okay in the middle.

On the other hand, as shown in FIG. 4, it is preferable to arrange the rod-shaped bodies 10 in a zigzag manner, and to further reduce the adjoining distance from the upper side to the lower side in order to improve the recoverability of the magnetic metal pieces. . That is, the zigzag shape allows the falling metal pieces to come into contact with any of the rod-shaped bodies. Further, by narrowing the interval downward, large metal pieces can be captured at the upper side, and small metal pieces can be captured at the lower side, so that separability is enhanced.

As described above, although it is not essential to provide the wire net 11 in the present invention, the presence of the wire net 11 brings an advantage of surely preventing the magnetic metal pieces from being mixed into the powder / agglomerate. On the contrary, if only the wire net 11 is provided without providing the rod-shaped body 10, the metal piece 4 closes the through hole of the wire net 10, and the powder and granular agglomerates are deposited on it, and the recovery hopper 9 is short. It becomes full in time, and when taking out the metal piece 4, it is necessary to separate the metal piece 4 from the powder and granular agglomerates, which is a great burden on the worker.

On the other hand, it is preferable to form an inclined surface on the recovery hopper 9 and to implant the group of rod-shaped bodies 10 on the inclined surface. When the rod-shaped body 10 is planted on the inclined surface 9a, the magnetic metal piece 4 caught on the rod-shaped body 10 is held along the inclined surface 9a. On the other hand, if the inclined surface 9a is not provided, the magnetic metal piece 4 is more likely to pass between the rod-shaped bodies 10 and tends to be deposited in large amounts on the wire net 11. further,
When the rod-shaped body 10 is planted on the inclined surface 9a, the metal pieces 4 are deposited unevenly on the inclined surface 9a side. As a result, the powder and granular lumps can be easily separated.

In the above example, it is conceivable that the recovery hopper is always exposed to the end portion of the belt conveyor 3, but this is not preferable because the lump frequently collides with the rod-shaped body 10 and the rod-shaped body 10 is severely worn. Therefore, as in the above example, it is preferable to drop the metal piece 4 into the recovery hopper 9 only when the metal piece 4 is detected.

As described above, the metal piece separating device of the present invention can increase the detection sensitivity of the metal piece detector 5 which has conventionally been problematic in reliability due to the fact that the collected metal pieces are less likely to be clogged and malfunction. (Responsive to magnetic lumps, etc.) can be accepted to enable detection and recovery of small metal pieces.

[Effect of device]

As described above, according to the present invention, the magnetic metal pieces can be reliably separated, and the magnetic metal pieces can be easily or automatically discharged, and the maintainability is improved.

[Brief description of drawings]

FIG. 1 is a perspective view of a main part of a recovery hopper of the present invention, and FIG.
FIG. 4 is a front view of the device of the present invention viewed from the outlet side of the belt conveyor, FIG. 3 is a right side view of FIG. 2, FIG. 4 is an explanatory view of an example of arrangement positions of rods and wire mesh, and FIG. FIG. 6 is an overall view of an example of the arrangement position of the device of the present invention, FIG. 6 is an explanatory view of the recovery hopper turning operation process at the time of discharging metal pieces, and FIGS. 7 and 8 are schematic views of an example of turning means of the hopper. 1 ... Raw material tank, 2 ... Raw material (object to be conveyed), 3 ... Belt, 6 ...
Sorting machine (magnetic separator), 9 ... recovery hopper, 9a ... inclined surface, 10
... rod-shaped body, 11 ... wire mesh, 12 ... storage hopper, 20 ... turning means, 21 ... horizontal axis of rotation.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location B65G 43/00 N

Claims (1)

[Scope of utility model registration request] 1. A belt conveyor for conveying an object to be conveyed containing a magnetic material such as a magnetic metal piece and a magnetic metal powder agglomerate, and a metal piece detector disposed at a conveyance process position of the belt conveyor. , A transported object collecting means for collecting the transported object by separating the metallic piece from the transported object at the exit portion or the intermediate portion of the belt conveyor based on the metal fragment detection signal from the detector, and its recovery path A recovery hopper that receives a magnetic material on the way and has an inclined surface that is inclined with respect to the ground is integrated with the recovery hopper that faces the magnetic material falling path and is substantially orthogonal to the falling direction, and the root approaches the inclined surface or With a plurality of metal piece separating rods in contact with each other, the recovery hopper can be turned around a horizontal axis to an angle at which the metal pieces caught on the metal piece separating rods fall at least freely. Pieces of metal separating device, characterized in that the.