JP2012005986A - Machine for separating waste material mixed with metal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem wherein, when iron scraps are mixed in building waste materials, the iron scraps can be relatively easily removed by a magnetic separator, but, when mixing metal is nonferrous metal, it is difficult to separate waste materials for recycling from the metal (nonferrous metal).SOLUTION: This machine for separating waste materials mixed with metal includes: a conveyor 3 for conveying waste materials mixed with metal; a metal detector 7 for detecting the metal in the waste materials being conveyed on the conveyor 3; a distribution chamber 4 provided, at the bottom thereof, with a passage 41 for waste materials for recycling and a passage 42 for metal; a sorting device 5 equipped with a damper 51 for sorting waste materials falling into the distribution chamber 4; and a controller 8 for operating the sorting device 5 on the basis of a metal detection signal from the metal detector 7. When metal is detected by the metal detector 7, the controller 8 performs control to operate, in accordance with timing of the fall of the detected metal into the distribution chamber 4, the damper 51 on an opening side of the passage for metal and thereafter to restore the damper on an opening side of the passage for waste materials for recycling after a predetermined timer.

Description

  The present invention relates to a metal-mixed waste material sorting machine for separating a metal-mixed waste material into a reusable recycling material and a metal that becomes a foreign material.

  When a building is dismantled, a large amount of building waste such as gypsum board and concrete is generated, but these building waste (for example, waste gypsum board) is often crushed and reused as a raw material for recycling.

  In building waste materials (for example, waste gypsum board), foreign metal is often mixed in a lump state, and when lump-like waste gypsum board can be used as a raw material for recycling, If the metal remains mixed, the massive metal bites into the crusher, causing the crusher to break or cause a failure.

  Therefore, conventionally, the metal-mixed waste material generated at the dismantling site or the like is subjected to a process as shown in FIG. 5 to remove the metal from the metal-mixed waste material (to obtain a recycling waste material).

  That is, as shown in FIG. 5, the massive building waste material (metal-mixed waste material A) is first put into a hopper of a crusher (step S1) and crushed to a predetermined particle size by the crusher (step S2). . Subsequently, the metal-mixed waste material crushed to a predetermined particle size is conveyed by a conveyor (step S3), and the iron scrap B in the metal-mixed waste material conveyed on the conveyor is adsorbed and removed by a magnetic separator (belt type magnetic separator). By doing (step 4), the recycling waste material C from which the iron scrap B is removed is obtained. The recycling waste material C is crushed to a smaller size in the next step to obtain a recycling raw material with a fine particle size.

  By the way, the iron scrap in the metal-mixed waste can be adsorbed and removed relatively easily by a magnet of a magnetic separator, but may not be adsorbed if it is a large lump (large weight). If the mixed metal is a non-ferrous metal (aluminum, copper, SUS material, etc.), it cannot be removed by a magnetic separator, so that the metal scrap remains mixed in the recycling waste material C. In addition, as a metal mixed in construction waste material, there exists a quite large thing about a door knob, for example.

  As described above, in the conventional general metal-mixed waste sorting machine, if non-ferrous metal is mixed in the waste material, the non-ferrous metal cannot be removed (it remains mixed in the recycled waste material). When the mixed metal is large, there is a problem that the metal lump bites into the crusher in the next crushing process, causing the crusher to break or break down.

  Therefore, in the present invention, even if the metal mixed in the metal-mixed waste material is not only iron scrap but also non-ferrous metal, the mixed metal (iron scrap and non-ferrous metal) can be eliminated well, The object of the present invention is to provide a metal-mixed waste material sorting machine that can efficiently (a large amount) separate waste materials for recycling from metal-mixed waste materials.

  The present invention has the following configuration as means for solving the above problems. The present invention is directed to a metal-mixed waste sorting machine for removing a metal from a metal-mixed waste and obtaining a useful recycling waste.

[Invention of Claim 1 of the Present Application]
The metal-mixed waste material sorting machine according to the first aspect of the present invention includes a conveyor for transporting a metal-mixed waste material mixed with metal, a metal detector for detecting metal in the scrap material transported on the conveyor, and a terminal portion of the conveyor. From a distribution chamber that can accept falling waste material and provided with a recycled material passage and a metal passage at the bottom, a sorting device with a damper that distributes the waste material falling into the distribution chamber into a recycling raw material passage and a metal passage, and a metal detector And a controller for operating the sorting device based on the metal detection signal.

  A belt conveyor that does not use metal is adopted as a conveyor for conveying the metal-mixed waste material. For example, metal-containing waste materials roughly crushed by a crusher are sequentially fed to the start end of the conveyor. Note that when the waste material is crushed by a crusher, small granular waste material is also generated by being mixed with a coarse material (for example, a particle size of 50 mm or more).

  As a metal detector for detecting the metal on the conveyor, one that can detect both iron scrap and non-ferrous metal is suitable, but it may be one that detects only non-ferrous metal. When using a metal detector that detects only non-ferrous metals, a magnetic separator (belt type) is provided on the conveyor where the metal-mixed waste is transported, and the iron separator is removed from the conveyor by the magnetic separator. It is good to do.

  The distribution device in the distribution chamber is configured such that the damper can be swung by switching means (for example, an air cylinder). In the case of using this sorter, the waste material path for recycling and the metal path at the bottom of the distribution chamber are selectively opened by swinging the damper by the switching means.

  When the metal detector is in a state where the metal is not detected, the controller positions the damper on the open side of the recycled material passage, and when the metal detector detects the metal, the controller detects the metal falling in the distribution chamber. After the damper is operated to the metal passage opening side, it is controlled to return to the regeneration raw material passage opening side after a predetermined timer.

  After the metal to be detected is detected by the metal detector, the timing (time) of falling from the conveyor end to the distribution chamber is the distance from the metal detector installation position on the conveyor to the conveyor end, the conveyor running speed, This can be grasped by calculating with the controller based on the above. In the actual machine, for example, 4 seconds after the metal detector generates a metal detection signal, the damper is operated to the metal passage opening side.

  In addition, after the damper is operated to the metal passage opening side, the timing (time) for returning the damper to the recycling waste material passage opening side is until the detected metal is guided to the upper surface of the damper and reaches the inlet of the metal passage. For example, 2 to 3 seconds later is appropriate.

  The metal-mixed waste material sorting machine according to claim 1 functions as follows.

  Waste material crushed relatively coarsely is sequentially put on the start end of the conveyor, and the waste material is sequentially transported through the conveyor. Whether or not metal is mixed in the transported waste material is constantly detected by a metal detector. Monitoring. In addition, in the thing which provided the magnetic separator on the conveyor, if there is iron scrap in the conveyance waste material, the iron scrap can be removed by adsorbing with the magnet of the magnetic separator (non-ferrous metal cannot be excluded by the magnetic separator).

  When the metal detector is in a metal non-detection state, the damper of the distribution device in the distribution chamber is located on the open side of the raw waste material passage, and removes non-metal-mixed waste material that falls into the distribution chamber from the end of the conveyor. The waste material is sent to the recycling waste material passage side while being guided by the damper. The metal-free waste material (which becomes a waste material for recycling) is sent to the next crushing step through the waste material path for recycling, where it is finely crushed and used as a raw material for recycling.

  On the other hand, when the metal detector detects a metal (for example, non-ferrous metal) in the waste material conveyed on the conveyor, a metal detection signal is issued from the metal detector to the controller. Then, the controller receives the metal detection signal, and in response to the command signal from the controller, operates the damper to the metal passage opening side in accordance with the timing at which the metal to be detected falls from the conveyor end portion into the distribution chamber (of the distribution device). The switching means is operated), and after the predetermined timer, the damper is returned to the recycling waste material passage opening side.

  Accordingly, in this metal-mixed waste material separator, the metal detected by the metal detector is discharged (excluded) from the distribution chamber through the metal passage, so that the metal and the waste material for recycling can be reliably separated. .

  In the metal-mixed waste sorting machine according to claim 1, while the damper is positioned on the side of the metal passage opening (for example, for 2 to 3 seconds), the waste for recycling (non-defective product) conveyed near the front and back of the metal to be detected. ) Is also sent to the metal passage side, but since the damper is operating on the metal passage opening side for a very short time (for example, 2 to 3 seconds), the amount of recycled waste material on the metal passage side is relatively small. There are few things.

[Invention of claim 2 of the present application]
The invention of claim 2 of the present application is characterized in that, in the metal-mixed waste material separator of claim 1, the inlet of the recycling waste material passage at the bottom of the distribution chamber is opened directly below the terminal end of the conveyor, while the damper of the sorting device Employs a comb-like or lattice-like one having a large number of gaps through which waste materials of a predetermined size or less can pass.

  As the damper used in the metal-mixed waste material separator according to the second aspect, for example, a comb in which a large number of comb bars are juxtaposed with a small interval (for example, an interval of about 30 mm) can be used. When this comb-like damper is located on the metal passage opening side, waste materials (recycled waste materials and metal scraps) smaller than the gap (for example, 30 mm) in the metal-mixed waste material falling into the distribution chamber from the end of the conveyor. Most of the waste falls to the recycling waste material passage side through the gap of the damper, and only the waste material (recycling waste material and metal scrap) larger than the clearance passes along the upper surface of the comb damper to the metal passage side. It will be sent out.

  Therefore, even when the damper is on the open side of the metal passage, it is possible to send out a small amount of the reclaimed waste material (good product) falling into the distribution chamber to the recycle waste material passage side. It is possible to reduce as much as possible the amount of good recycled waste.

  By the way, according to the second aspect, even if the metal is detected by the metal detector, the metal scrap smaller than the gap of the damper is sent to the recycling waste material passage side through the gap. The metal scrap sent to the waste material passage side is only a small lump that passes through the gap, and even if such a small lump metal scrap is sent to the next crushing process together with the waste for recycling, the crusher There will be no adverse effects that may cause damage or failure.

[Effect of the invention of claim 1 of the present application]
The metal-mixed waste sorting machine according to the first aspect of the present invention detects the metal with a metal detector when there is metal in the waste material conveyed on the conveyor, and the detected metal is detected by the metal detection signal. The damper in the distribution chamber is operated to the metal passage opening side in accordance with the timing of falling from the section.

  Therefore, in the metal-mixed waste material separator according to the first aspect, the metal mixed in the waste material can be reliably separated from the waste material for recycling, and even if the metal to be detected is a non-ferrous metal, it can be reliably separated. There is an effect.

  In addition, the waste material for recycling from which the metal is removed in this way is crushed to a small size in the next step, but if the waste material for recycling put into the crusher excludes the metal, the crusher may be damaged or malfunctioned. It becomes difficult to do.

[Effect of the invention of claim 2 of the present application]
The invention of claim 2 of the present application is the metal-mixed waste material separator according to claim 1, wherein the entrance of the recycling waste material passage at the bottom of the distribution chamber is opened directly below the terminal end of the conveyor and has a predetermined size or less. Since a comb-like or lattice-like one having a large number of gaps through which the waste material can pass is adopted, even in a state where the damper is located on the metal passage open side, the metal mixed waste material falling into the distribution chamber Most of the waste material (including the waste material for recycling and metal waste) smaller than the gap falls to the side of the waste material path for recycling through the gap of the damper.

  Therefore, in the metal-mixed waste material separator of claim 2, in addition to the effect of claim 1, even if the damper is on the metal passage opening side, the small waste recycling material (good product) falling into the distribution chamber is small. Since the waste can be sent to the recycling waste material passage side, there is an effect that the amount of the good recycling waste mixed into the metal scraps sorted as defective can be reduced as much as possible.

It is the schematic of the metal mixing waste material sorter of an example of this application. It is an enlarged view of the distribution chamber vicinity in the metal mixing waste material sorter of FIG. It is an expansion perspective view of the distribution apparatus part in the metal mixing waste material sorter of FIG. It is operation | movement explanatory drawing of the metal mixing waste material sorter of FIG. It is explanatory drawing of the classification method of the conventional general metal mixing waste material.

  Hereinafter, with reference to FIGS. 1-4, the metal mixing waste material sorter of an Example of this application is demonstrated. A typical example of the recycled waste material separated by this metal-mixed waste material sorting machine is a waste gypsum board, but it can also be used for separation for recycling of waste concrete.

  The metal-mixed waste material sorting machine shown in FIG. 1 transports the conveyor 3 that transports the metal-mixed waste material mixed with metal, the magnetic separator 6 that eliminates iron scraps in the scrap material transported on the conveyor 3, and the conveyor 3 Distributing the metal detector 7 for detecting the metal (especially non-ferrous metal) in the waste material to be collected, the waste material falling from the end portion 3b of the conveyor 3, and the waste material passage 41 for recycling and the metal passage 42 provided at the bottom The chamber 4, the sorting device 5 with the damper 51 for sorting the waste material falling into the distribution chamber 4 into the recycling waste material passage 41 and the metal passage 42, and the sorting device 5 are operated based on the metal detection signal from the metal detector 7. The controller 8 is a basic configuration.

  A belt conveyor that does not use metal is adopted as the conveyor 3 for transporting the metal-mixed waste material.

  In this embodiment, when throwing the metal-mixed waste material onto the starting end portion 3a of the conveyor 3, the massive building waste material (mixed with metal) carried out from the dismantling site is roughly crushed by the crusher 1, and the coarse The crushed metal-mixed waste material is fed from the feeding conveyor (screw conveyor) 2 to the starting end portion 3 a of the conveyor 3. Therefore, in this embodiment, by putting the building waste as a large block into the hopper 11 of the crusher 1, the metal-mixed waste material roughly crushed can be supplied onto the start end 3a of the conveyor 3 by a predetermined amount.

  In this embodiment, a magnetic separator 6 is installed on the conveyor 3, and this magnetic separator 6 is a belt type. And if this iron separator is in the waste material conveyed on the conveyor 3, this magnetic separator 6 will adsorb this iron scrap by magnetism, and will exclude from the conveyor 3.

  The metal detector 7 detects the metal in the metal mixed waste material conveyed on the conveyor 3. The metal detector 7 is preferably one that can detect both iron scrap and non-ferrous metal. However, in the case of using the magnetic separator 6 as in this embodiment, only non-ferrous metal is detected. There may be. In addition, even if the magnetic separator 6 is used, if the metal detector 7 is capable of detecting iron and non-ferrous metals, iron scraps that could not be removed by the magnetic separator 6 are also recovered from recycling waste as described later. Can be separated.

  The metal detector 7 detects a metal (mainly non-ferrous metal) in the metal mixed waste conveyed on the conveyor 3 and outputs the metal detection signal to the controller 8. ing.

  As shown in an enlarged view in FIG. 2, the distribution chamber 4 is a vertically box-shaped container that can receive waste material falling from the end portion 3 b of the conveyor 3.

  1 and 2, a recycling waste material passage 41 for sending the recycling waste material C to the right half and a metal passage 42 for sending the metal B to the left half are provided at the bottom of the distribution chamber 4. ing. In FIG. 2, a symbol C indicated by a circle is a waste material for recycling (for example, gypsum waste), and a symbol B indicated by a square is a metal scrap (mainly nonferrous metal scrap).

  The inlet 41a of the recycling waste material passage 41 provided at the bottom of the distribution chamber is opened immediately below the conveyor terminal portion 3b. When there is no damper 51 described later, the entire amount of waste material falling from the conveyor terminal portion 3b is used for recycling. It falls into the inlet 41 a of the waste material passage 41. In this embodiment, as shown in FIG. 2, the inlet 41 a of the recycling waste material passage 41 has a slightly larger area than the inlet 42 a of the metal passage 42.

  The distribution device 5 provided in the distribution chamber 4 is composed of a damper 51 installed so as to be able to swing left and right (front and rear in the conveyor conveyance direction) in the distribution chamber 4, and a switching means 50 for switching the position of the damper 51. Yes. In this embodiment, an air cylinder is used as the switching means 50. In the following description, this switching means 50 is referred to as an air cylinder.

  As the damper 51, as shown in FIG. 3, a comb-shaped damper is used in which a large number of comb bars 52, 52... Are juxtaposed at a small interval (for example, an interval of about 30 mm). Accordingly, the damper 51 is provided with gaps 53, 53,... Between the comb bars 52, 52 with small intervals (intervals of about 30 mm). The gap 53 between the comb bars 52 and 52 allows a small lump-like waste material smaller than 30 mm to pass therethrough, for example.

  In another embodiment, the gaps 53, 53,... Provided in the damper 51 can be formed in a lattice shape instead of a comb shape.

  As shown in FIG. 2, the damper 51 is mounted by pivotally supporting it on the wall surface of the distribution chamber in a state where the shaft 51a at the lower end is directed in the front-rear direction (depth direction in FIG. 2) near the bottom of the distribution chamber 4. It has been. Further, as shown in FIG. 2, the shaft 51a of the damper 51 is displaced to the metal passage 42 side by a predetermined length L from the position where the waste material (C or B) falls from the conveyor terminal portion 3b. Accordingly, the opening width of the inlet 41a of the recycling waste material passage 41 is increased.

  In the distribution device 5, the expansion / contraction operation of the air cylinder 50 can switch the damper 51 between a recycling waste material passage opening posture shown by a solid line and a metal passage opening posture shown by a chain line (reference numeral 51 '). .

  When the metal detector 7 is in a state where the metal is not detected, the controller 8 positions the damper 51 on the side where the regeneration raw material passage 41 (inlet 41a) is opened as shown by the solid line, while the metal detector 7 detects metal. In some cases, the damper 51 is actuated on the open side of the metal passage 42 as indicated by the chain line (reference numeral 51 ') at the timing when the metal to be detected falls into the distribution chamber 4 from the conveyor terminal portion 3b, and then after a predetermined timer. Control is made so that the recycled material passage 41 is returned to the open side.

  As described above, after the metal to be detected is detected by the metal detector 7, the timing (time) of falling into the distribution chamber 4 from the conveyor terminal portion 3 b is the conveyor from the installation position of the metal detector 7 on the conveyor 3. This can be grasped by calculating with the controller 8 based on the distance to the end portion 3b and the traveling speed of the conveyor 3. In the actual machine, for example, 4 seconds after the metal detector 7 issues the metal detection signal, the damper 51 is operated to the metal passage opening side.

  Further, after the damper 51 is operated to the opening side of the metal passage 42, the timing (time) for returning the damper 51 to the opening side of the recycling waste material passage 41 is determined by the metal 51 to be detected (reference numeral B in FIG. 2). For example, 2 to 3 seconds after reaching the inlet 42a of the metal passage 42 after being guided by the upper surface is appropriate.

  At the outlet of the recycling waste material passage 41, a transport conveyor (screw conveyor) for transporting the recycling waste material C sent through the recycling waste material passage 41 to the crushing process (crusher) of the next process is installed. ing. Further, a storage container for storing the metal scrap B sent through the metal passage 42 is installed at the outlet of the metal passage 42.

  The operation method of the metal-mixed waste material sorting machine of this embodiment will be described with reference to FIG. In addition, since the metal detector 7 is in a metal non-detection state at the start of operation, the damper 51 of the sorting device 5 is located on the side where the recycling waste material passage 41 shown by a solid line in FIGS. 1 to 3 is opened. .

  The massive building waste material (the metal-mixed waste material A in FIG. 4) carried out from the dismantling site is put into the hopper 11 of the crusher 1 shown in FIG. S2). Then, the metal-mixed waste material roughly crushed by the crusher 1 is supplied onto the start end portion 3a of the conveyor 3 by a predetermined amount by the input conveyor 2, and is sequentially conveyed on the conveyor (S3).

  On the conveyor 3, first, iron scraps in the metal-mixed waste material are removed by the magnetic separator 6 (S4). That is, if iron scraps are mixed in the waste material conveyed on the conveyor 3, the iron scraps are removed by the magnetic adsorption action of the magnetic separator 6. Even if non-ferrous metal is contained in the waste material, the magnetic separator 6 cannot remove the non-ferrous metal.

  At the installation position of the metal detector 7, it is monitored whether or not metal (non-ferrous metal) is mixed in the waste material conveyed on the conveyor 3 by the metal detector 7 (S5). In the state where the metal detector 7 does not detect metal (S6), only the waste material for recycling (non-defective product) is conveyed, so that the damper 51 remains in the normal position (the position indicated by the solid line in FIGS. 1 to 3). The total amount of the recycling waste material C that is maintained (S7) and falls into the distribution chamber 4 from the conveyor terminal portion 3b falls to the recycling waste material passage 41 side (S8). And the waste material C for reproduction | regeneration is conveyed by the next process (crushing process) side with the conveyance conveyor 9 (S9). Incidentally, the recycling waste material C conveyed to the crushing process side is crushed to a fine particle size by a crusher and becomes a recycling raw material.

  On the other hand, when the metal detector 7 detects the metal (non-ferrous metal) in the waste material being conveyed on the conveyor 3 (S10), a metal detection signal from the metal detector 7 is sent to the controller 8, and the controller 8 After a predetermined timer (for example, 4 seconds after the detection metal B falls from the conveyor terminal portion 3b), an operation signal is issued to the air cylinder 50 of the sorting device 5 (the damper 51 is moved to the metal passage 42 open side). After the predetermined timer, a signal for returning the damper 51 to the original state is issued to the air cylinder 50. That is, the damper 51 is operated toward the metal passage opening side for a time required for the detected metal B to reach the inlet 42a of the metal passage 42 from the time when the detected metal B falls from the conveyor terminal portion 3b (S11). At this time, the detected metal B falling from the conveyor terminal portion 3b is guided to the upper surface of the damper 51 'at the position indicated by the chain line and falls from the metal passage inlet 42a into the metal passage 42 (S12). It is stored in the storage container 10 from the lower end of 42 (S13).

  In this way, the metal-mixed waste material separator of this embodiment can reliably separate the metal mixed in the waste material from the waste material for recycling, and reliably separates the detected metal even if it is a non-ferrous metal. it can.

  Further, while the damper 51 is positioned on the open side of the metal passage 42 by the metal detection signal from the metal detector 7 (for example, for 2 to 3 seconds), the recycling waste material C transported around the front and back of the metal B to be detected. In this embodiment, the inlet 41a of the recycling waste material passage 41 at the bottom of the distribution chamber 4 is opened directly below the conveyor end portion 3b, and the damper 51 is guided by the damper 51. 51, which has a large number of gaps 53, 53,... Through which waste materials of a predetermined size or less can pass, is adopted in the distribution chamber 4 even when the damper 51 is located on the metal passage opening side. Most of the waste material (including the waste material for recycling and the metal scrap) smaller than the gap 53 in the metal-mixed waste material that falls on the metal falls through the gap 53 of the damper 51 to the side of the waste material passage 41 for recycling. .

  Therefore, even in a state where the damper 51 is on the metal passage open side (a state shown in a chain line), a small one of the recycling waste material C (good product) falling into the distribution chamber 4 can be sent to the recycling waste material passage 41 side. It is possible to reduce as much as possible the amount of the recycled waste material C, which is a non-defective product, in the metal scrap B separated as a defective product.

  By the way, in the state where the damper 51 is on the metal path open side (the state shown by the chain line), when the metal scrap B falling from the conveyor terminal portion 3b is smaller than each gap 53 of the damper 51 (the particle size of the metal scrap B is smaller than 30 mm). In this case, the small metal scrap B may fall to the recycling waste material passage 41 side from the gap 53 of the 51, but the metal scrap B passing through the gap 53 is in the form of a small lump (particle size of 30 mm or less). Even if such a small metal scrap B is sent to the next crushing process together with the waste material C for recycling, there is no adverse effect that the crusher breaks or breaks down.

  3 is a conveyor, 4 is a distribution chamber, 5 is a sorting device, 6 is a magnetic separator, 7 is a metal detector, 8 is a controller, 41 is a recycling waste material passage, 41 is an inlet of the recycling waste material passage, 42 is a metal passage, 42a is a metal passage entrance, 50 is an air cylinder, 51 is a damper, 52 is a comb bar, and 53 is a gap.

Claims (2)

From the conveyor (3) for transporting the metal-mixed waste material mixed with metal, the metal detector (7) for detecting the metal in the waste material transported on the conveyor (3), and the end of the conveyor (3) A distribution chamber (4) capable of receiving the falling waste material and having a recycling waste material passage (41) and a metal passage (42) at the bottom, and the waste material falling into the distribution chamber (4) (41) and a distribution device (5) with a damper (51) for distribution to the metal passage (42), and a controller for operating the distribution device (5) based on a metal detection signal from the metal detector (7) (8)
When the metal detector (7) detects the metal, the controller (8) moves the damper (51) to the regenerative raw material passage open side when the metal detector (7) is not detecting the metal. After the damper (51) is operated to the metal passage opening side in accordance with the timing at which the metal to be detected falls into the distribution chamber (4), control is performed to return to the recycling waste material passage opening side after a predetermined timer.
This is a metal-mixed waste material separator. In claim 1,
While the inlet (41a) of the recycling waste material passage (41) at the bottom of the distribution chamber (4) is opened directly below the terminal end of the conveyor (3),
The damper (51) employs a comb-like or lattice-like one having a large number of gaps (53) through which waste materials having a predetermined size or less can pass.
This is a metal-mixed waste material separator.

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