JP2018164872A - Method for processing metal-containing waste - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a selection accuracy of a metal-containing waste such as shredder dusts in a waste vehicle.SOLUTION: A method for processing metal-containing waste by which the metal-containing waste is supplied to an air table 8 for dry specific gravity selection and a metal is recovered, and in which operating conditions of the air table are adjusted based on a color of the waste on the air table. A position of a division plate, which is fitted to an exhaust port of the air table, can be adjusted based on the color of the waste on the air table. The metal-containing waste may be supplied to the air table after breaking thereof, or may be broken after heating thereof, and thereafter, may be supplied to the air table. A magnetically attracted material is removed by magnetic force selection of the broken metal-containing waste, a light-weight material is removed by wind force selection of the metal-containing waste from which the magnetically attracted material has been removed, a magnetically attracted material is removed by magnetic force selection of the metal-containing waste, from which the light-weight material has been removed, and the metal-containing waste, from which the magnetically attracted material has been removed, can be supplied to the air table.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a method for treating a waste containing metal, and more particularly, to a method for selecting and recycling a shredder dust of a discarded vehicle.

  Conventionally, discarded vehicles and the like are recycled by, for example, separating and recovering valuable materials such as iron through a magnetic separator after being finely cut by a large cutter such as a shredder in an iron recycling factory. At that time, debris residue (shredder dust) called ASR (Automobile Shredder Residues) is generated.

  Since this shredder dust contains valuable materials such as copper and aluminum that could not be separated and collected by a magnetic separator or the like, these valuable materials were separated and collected through a specific gravity sorter or the like.

  However, since the shredder dust has variations in properties and particle size distribution, there is a risk that what should be sorted into light products will be sorted into heavy products when the operating conditions of the specific gravity sorter are constant, and the sorting accuracy is high. There was room for improvement.

  Therefore, the present invention has been made under the above-described circumstances, and an object thereof is to improve the sorting accuracy of metal-containing waste such as shredder dust of discarded vehicles.

  In order to achieve the above object, the present invention provides a metal-containing waste processing method for recovering metal by supplying metal-containing waste to an air table for dry specific gravity sorting, wherein the waste on the air table is collected. The operating condition of the air table is adjusted based on the color.

  According to the present invention, attention is paid to the fact that the metal and the embrittled material such as the resin contained in the metal-containing waste are different from each other, and further that there are different colors among the metals. Therefore, it is possible to improve the sorting accuracy and efficiently process the metal-containing waste.

  In the method for treating metal-containing waste, the position of the partition plate attached to the discharge port of the air table can be adjusted based on the color of the waste on the air table.

  In the method for treating metal-containing waste, after the metal-containing waste is crushed and then supplied to the air table, the color of the metal appears further and the sorting accuracy of the metal-containing waste can be further improved. .

  In the method for treating metal-containing waste, the metal-containing waste can be heated and then crushed and then supplied to the air table. By crushing the resin or the like that has become brittle by heating, the color of the metal appears more and the sorting accuracy of the metal-containing waste can be improved.

  In the method for treating metal-containing waste, the crushed metal-containing waste is magnetically sorted to remove magnetic deposits, the metal-containing waste from which the magnetic deposits have been removed is subjected to wind sorting to remove lightweight items, The metal-containing waste from which the lightweight material has been removed is magnetically sorted to remove the magnetic deposit, and the metal-containing waste from which the magnetic deposit has been removed can be supplied to the air table. As a result, before supplying metal-containing waste to the air table, magnetic deposits such as iron and mainly light-weight items other than metal can be recovered from the waste, further improving the accuracy of sorting metal-containing waste. Can be improved.

  In the method for treating metal-containing waste, the metal-containing waste from which the magnetic deposits have been removed after the light-weight material is removed is sieved, and the metal-containing waste of a plurality of particles obtained by the sieve sorting is separately obtained. It can be supplied to the air table. Thereby, since the particle sizes of the metal-containing waste to be supplied to the air table can be made uniform, the sorting accuracy can be further improved.

  In the method for treating metal-containing waste, a heavy product obtained by supplying to the air table can be supplied to the second air table. Thereby, the metal which is the heavy product obtained by sorting with the first air table can be further sorted to further improve the sorting accuracy.

  In the metal-containing waste processing method, together with the metal-containing waste, another metal-containing waste having a metal content higher than that of the metal-containing waste can be supplied to the first air table. As a result, even when the metal content of the metal-containing waste is low, the boundary between the metal and the waste other than the metal in the color distribution of the metal-containing waste on the air table can be easily recognized, and further sorting is performed. Accuracy can be improved.

  In the method for treating metal-containing waste, the metal-containing waste can contain a resin, and ASR or the like can be suitably treated.

  In the method for treating metal-containing waste, the metal-containing waste can contain aluminum and copper, and can be efficiently sorted based on the colors of aluminum and copper.

  As described above, according to the present invention, it is possible to improve the sorting accuracy of metal-containing waste such as shredder dust of discarded vehicles.

It is a flowchart for demonstrating 1st Embodiment of the processing method of the metal containing waste which concerns on this invention. An example of the air table used with the processing method of the metal containing waste which concerns on this invention is shown, (a) is a schematic perspective view which shows the state before processing a metal containing waste, (b) is actually a metal containing waste. It is a schematic top view which shows the state which is processing. It is a flowchart for demonstrating 2nd Embodiment of the processing method of the metal containing waste which concerns on this invention. It is a flowchart for demonstrating 3rd Embodiment of the processing method of the metal containing waste which concerns on this invention.

  Next, embodiments for carrying out the present invention will be described in detail with reference to the drawings. In the following description, a case where the shredder dust (hereinafter referred to as “dust”) of a discarded vehicle is treated as the metal-containing waste will be described as an example.

  FIG. 1 shows a treatment apparatus 1 used for carrying out the first embodiment of the method for treating metal-containing waste according to the present invention, which treatment apparatus 1 comprises a heating apparatus 2 for heating received dust D1, A crusher 3 for crushing dust D2 after heating, a magnetic separator (hereinafter referred to as "magnetic separator") 4 for removing magnetic deposits from the dust D3 after crushing, and a lighter material from dust D4 after removing the magnetic deposits A wind sorter (hereinafter referred to as “wind sorter”) 5, a magnetic separator 6 that removes magnetic deposits from the dust D 5 after removal of lightweight materials, a sieve sorter 7 that sorts dust D 6 after removal of magnetic deposits, It comprises air tables 8 and 9 for finely sorting the fine particles D7 and coarse particles D8 after the sieve screening, respectively.

  Note that the dust D1 to be processed in the present embodiment contains aluminum and copper in an amount of 1% or more with respect to the total weight of the dust D1.

  The heating device 2 is provided to embrittle the resin (waste other than metal) in the dust D1 by heating the received dust D1 at 250 to 400 ° C.

  By heating the dust D1 by the heating device 2, the fixed carbon concentration of the resin in the dust D1 is increased, and brown and black particles are increased. On the other hand, most of the metal waste in the dust D1 generates an oxide film and becomes light brown or brown, or the brittle resin is fused and coated in brown or black, resulting in a metallic luster on the surface. Disappears.

  The crusher 3 is provided in order to crush the heated dust D2 to about several mm to several tens mm. In order to ensure good separation accuracy on the air table, it is preferable to crush the dust D2 so that the particle size in the range of 0.5 to 10 mm is 60% by weight or more, and crush the entire amount at once. When setting to process, it is preferable to set a maximum particle size to 5-10 mm. This is because if the number of particles having a particle size of less than 0.5 mm is too large, or if the number of particles having a particle size of 10 mm or more is too large, the separation accuracy may decrease. The crusher 3 crushes the metal contained in the dust D2 and exposes the portion where the internal metallic luster remains, thereby obtaining the dust D3 in which the color of the metal can be visually confirmed. As this crusher 3, the cutter type may wear the blade due to the shearing of the metal waste, or the metal waste may be excessively pulverized, and the roller mill may be excessively pulverized or vibrated when there is a lot of metal. Therefore, it is preferable to use an impact crusher, a hammer crusher or a roll crusher.

  As the magnetic separators 4 and 6, permanent magnet type suspended magnetic separators can be used, and as the wind separator 5, an internal circulation type can be used.

  The sieve sorter 7 has a sieve size of about 5 mm, and sorts the dust D6 from the magnetic separator 6 into fine grains D7 having a particle diameter of 5 mm or less and coarse grains D8 having a grain diameter exceeding 5 mm. Provided.

  The air tables 8 and 9 are provided for performing dry specific gravity sorting of the fine particles D7 and the coarse particles D8 after screening, and the same apparatus can be used. Hereinafter, the air table 8 will be described as a representative.

  As shown in FIG. 2 (a), the air table 8 is obtained by subjecting the fine particles D7 discharged from the sieve sorter 7 (see FIG. 1) to dry light specific gravity sorting, light products L1 and heavy products H1, and intermediate specific gravity thereof. Provided with a plurality of small vents that allow air A to pass through and are inclined at predetermined inclination angles θ1 (end slope) and θ2 (side slope). A vibrating table 8a that vibrates in the air, a blower blower (not shown) that supplies air A from the lower surface to the upper surface by rotating, and each product discharged from the end 8b of the vibrating table 8a. Partition plates 8c and 8d as boundaries are provided.

  Next, the processing method of the metal containing waste which concerns on this invention is demonstrated, referring FIG.1 and FIG.2.

  First, the received dust D1 is supplied to the heating device 2 and heated, and the dust D2 embrittled by heating is supplied to the crusher 3 and crushed. Here, as described above, the metal contained in the dust D2 loses the metallic luster of the surface by heating, but the metal of the dust D3 discharged from the crusher 3 is a portion where the metallic luster inside remains due to the crushing. Is exposed so that the color of the metal can be seen.

  Next, the dust D3 discharged from the crusher 3 is supplied to the magnetic separator 4, and after removing magnetic deposits such as iron in the magnetic separator 4, the dust D4 from the magnetic separator 4 is supplied to the wind separator 5. Remove lightweight objects. Then, the dust D5 after removing the lightweight material is supplied to the magnetic separator 6, and after the magnetic deposit such as iron is removed by the magnetic separator 6, the dust D6 from the magnetic separator 6 is supplied to the sieve separator 7 and finely divided. Sort into grain D7 and coarse grain D8.

  As shown in FIG. 2 (a), the fine particles D7 are supplied onto the vibration table 8a of the air table 8, and the vibration table 8a and the air A sent from the blower blower are used on the vibration table 8a. 2 (b), a flow of light product L1, medium product M1 and heavy product H1 is formed, and these products L1, M1, and H1 are separated from the end of the vibration table 8a by the partition plates 8c and 8d. It is discharged separately from the part 8b. The air table 9 will be described later.

  Here, the partition plates 8c and 8d predict the positions of the boundaries of the products L1, M1 and H1 at the end 8b of the air table 8 based on the properties of the fine particles D7, and are attached to the positions of these boundaries. Therefore, when the properties of the fine particles D7 are different from those predicted, the positions of the boundaries of the products L1, M1, and H1 at the end 8b of the air table 8 are different from those predicted. There is a possibility that the medium product M1 and the heavy product H1 are mixed in the product discharged as the light product L1.

  Therefore, in the present embodiment, the color distribution of the fine particles D7 is visually confirmed, and the positions of the partition plates 8c and 8d are adjusted based on the color distribution. Here, the color distribution is generated from approximately three colors of brown and black that the fixed carbon of the light product L1 has, the silver that the aluminum of the medium product M1 has, and the copper that the copper of the heavy product H1 has. Further, the amounts of θ1, θ2, the amount of air A, and the frequency of the vibration table are adjusted so that the boundary of the color distribution becomes clear and the flow of the light product L1, the medium product M1, and the heavy product H1 has a certain width. .

  Similarly, in the air table 9, as shown in FIG. 1, when the coarse particles D8 are subjected to dry specific gravity sorting into the light product L2 and the heavy product H2, the air table 9 has a color distribution based on the color distribution of the coarse particles D8. Adjust the position of the partition plate (not shown).

  Here, the light products L1 and L2 obtained in the air tables 8 and 9 are embrittled materials such as resin, and the intermediate product M1 obtained in the air table 8 is aluminum or glass, and is obtained in the air table 8. The obtained heavy product H1 is a noble metal such as copper, gold or silver, and the heavy product H2 obtained in the air table 9 is aluminum.

  In the air table 8, a small amount of copper or the like is mixed in the medium product M1 and a small amount of aluminum may be mixed in the heavy product H1, but in this case, the medium product M1 and the heavy product H1 are each having a specific gravity. It is processed by a sorter or a color sorter, and copper and the like are removed from the middle product M1, and aluminum is removed from the heavy product H1.

  Moreover, when the metal content rate of the received dust D1 is low, the color of a metal cannot be visually recognized on the air tables 8 and 9, and the air tables 8 and 9 may become brown or black uniformly. In that case, by supplying waste containing a certain amount of metal onto the air tables 8 and 9, the color of the metal originally contained in the dust D1 can be easily recognized.

  As described above, according to the present embodiment, the color of the metal contained in the shredder dust of the discarded vehicle and the embrittled material such as resin are different from each other, and there are also metals having different colors from each other. Focusing on the fact that the operating conditions of the air table can be adjusted based on the color, it is possible to cope with changes in the properties of the waste, and it is possible to improve the accuracy of shredding dust sorting. .

  In the present embodiment, the shredder dust of the discarded vehicle has been described as an example of the waste, but the present invention is not limited to this, and other metal containing materials such as a shredder dust (SR: Shredder Residues) of the waste home appliance. It can also be applied to waste.

  Moreover, in this Embodiment, the two partition plates 8c and 8d are attached to the position of the boundary of each product L1, M1, and H1. However, the present invention is not limited to this, and only one partition plate 8c may be attached to the position of the boundary between the intermediate product M1 and the light product L1. In this case, since the selection is performed in a state where the intermediate product M1 and the heavy product H1 are mixed, the aluminum in the intermediate product M1 and the copper in the heavy product H1 are later selected by a specific gravity sorter or a color sorter.

  Moreover, the dust D1 mentioned above contains aluminum and copper 1% or more with respect to the total weight of the dust D1, respectively. However, when the aluminum content is 1% or more and the copper content is less than 1% with respect to the total weight of the dust D1, the heavy product M1 contains many metals such as iron, nickel, and noble metals other than copper. It becomes.

  At this time, many metals other than copper do not have metallic luster, and this cannot be used as a guide for the location of the partition plate 8d. However, since aluminum has metallic luster, each product L1 is based on the metallic luster of aluminum. , M1 and H1 may be attached to the partition plates 8c and 8d. In this case, the partition plate 8c may be provided between the heavy product H1 and the intermediate product M1, and the partition plate 8d may be provided at two locations between the intermediate product M1 and the light product L1, or one partition plate 8c may be provided as the intermediate product. You may attach to the position of the boundary of M1 and the light product L1. In the case of one partition plate 8c, since selection is performed in a state where the intermediate product M1 and the heavy product H1 are mixed, the aluminum in the intermediate product M1 and the metal in the heavy product H1 are later selected by specific gravity sorter or color selection. Sort by machine.

  Further, when aluminum is less than 1% and copper is 1% or more with respect to the total weight of dust D1, the metallic luster of aluminum cannot be used as a guide for the location of partition plates 8c and 8d. Since the light product L1 and the heavy product H1 can be distinguished from each other by the metallic luster, one partition plate 8c can be provided between the light product L1 and the heavy product H1. Since the selected heavy product H1 contains a small amount of embrittlement such as resin, the heavy product H1 is processed by a specific gravity sorter or a color sorter, and the embrittlement such as resin is removed from the heavy product H1.

  In this case, a small amount of copper or the like is also mixed in the light product L1, and in order to recover this copper, etc., it is necessary to use the entire amount of the light product L1 to a specific gravity sorter or a color sorter. Since L1 is large, it is difficult to perform this process.

  Therefore, it is preferable to perform treatment by separately adding waste having a high aluminum content before supplying to the dust D1 or the air table 8 so that the aluminum content becomes 1% or more. Thereby, the division of the middle product M1 is formed between the light product L1 and the heavy product H1, and copper or the like can be prevented from being mixed into the light product L1.

  Moreover, when both aluminum and copper are less than 1% with respect to the total weight of the dust D1, only the light product L1 can be confirmed, and the suitable collection position of the intermediate product M1 and the heavy product H1 cannot be determined. It is difficult to determine the installation positions of the partition plates 8c and 8d.

  In this case, waste containing aluminum and / or copper is added before being supplied to the dust D1 or the air table 8 so that the contents of aluminum and copper are 1% or more, so The region of the product H1 clearly appears, and a suitable installation location of the partition plates 8c and 8d can be determined.

  Examples of waste containing a large amount of aluminum include waste clothing with decorative tools such as fasteners and buttons, and an aluminum electrolytic capacitor electrically mounted on a substrate. In addition, examples of the waste containing a large amount of copper (including brass and white) include waste clothing with a decorative tool such as a fastener and a button, an electric wire connector, a USB cable, a modular plug, and a coated copper wire.

  The operation of the air table 8 is fed back based on the recovery status of the heavy product H1 so that the heavy product H1 such as copper and precious metals increases. Specifically, the position of the partition plates 8c and 8d of the air table 8, the frequency of the vibration table 8a, the inclination angles θ1 and θ2 of the vibration table 8a, the air amount of the vibration table 8a, etc. Feedback control based on the collection status. The recovery status of the heavy product H1 is determined, for example, by measuring the bulk specific gravity of the recovered heavy product H1.

  Next, a second embodiment of the present invention will be described with reference to FIG.

  The difference between the processing apparatus 100 according to the second embodiment and the processing apparatus 1 according to the first embodiment is that the dust D6 is divided into fine grains D9, medium grains D10, and coarse grains D11 by a sieve sorter 7. It is the point which sorts into one and processes with the air tables 10, 11, and 12 about each of the fine grain D9, the medium grain D10, and the coarse grain D11. The description of the same configuration as the processing apparatus 1 other than this is omitted.

  The fine particles D9 are particles having a particle size of less than 2 mm, the medium particles D10 are particles having a particle size of 2 mm or more and 5 mm or less, and the coarse particles D11 are particles having a particle size of more than 5 mm.

  The fine particles D9 are sorted into a light product L3 and a heavy product H3 by the air table 10. The light product L3 is glass, and the heavy product H3 is copper or a noble metal. The partition plate is provided on the basis of the color of copper between the flow of the light product L3 and the flow of the heavy product H3, and enables selection of these.

  The medium grain D10 is sorted by the air table 11 into a light product L4, a medium product M4, and a heavy product H4. The light product L4 is an embrittlement such as a resin, the medium product M4 is aluminum or glass, and the heavy product H4 is copper or a noble metal. A partition plate is provided between the flow of the light product L4 and the flow of the medium product M4, and between the medium product M4 and the heavy product H4, based on the colors of aluminum and copper, respectively, and enables selection of these. .

  Coarse particles D11 are classified into light product L5 and heavy product H5 by air table 12. The light product L5 is an embrittlement such as a resin, and the heavy product H5 is aluminum. The partition plate is provided on the basis of the color of aluminum between the flow of the light product L5 and the flow of the heavy product H5, and enables selection of these.

  Focusing on the fact that the color of the metal and the embrittlement such as the resin contained in the shredder dust of the discarded vehicle are different from each other, and further, there are those in which the colors are different from each other in the present embodiment, Since the operating conditions of the air table can be adjusted based on the color, it is possible to cope with a change in the properties of the waste, and it is possible to improve the shredder dust sorting accuracy.

  Next, a third embodiment of the present invention will be described with reference to FIG.

  The processing apparatus 200 according to the third embodiment is different from the processing apparatus 1 according to the first embodiment in that the dust D6 after removal of magnetic deposits by the magnetic separator 6 is not subjected to sieving selection but in two stages. This is the point of performing sorting by the air tables 13 and 14. The description of the same configuration as the processing apparatus 1 other than this is omitted.

  The dust D6 after removal of the magnetic deposits by the magnetic separator 6 is supplied to the air table 13 and sorted into light products L6 and heavy products H6. The light product L6 is an embrittlement such as a resin, and the heavy product H6 is a mixture of aluminum, glass, copper, and a noble metal. The partition plate is provided between the flow of the light product L6 and the flow of the heavy product H6 based on the colors of aluminum and copper, and enables selection of these.

  Then, the heavy product H6 is supplied to the air table 14, and is sorted into a light product L7, a medium product M7, and a heavy product H7. The light product L7 is glass, the medium product M7 is aluminum, and the heavy product H7 is copper or a noble metal. The partition plate is provided between the flow of the light product L7 and the flow of the medium product M7, and between the medium product M7 and the heavy product H7, based on the colors of aluminum and copper, respectively, and enables selection of these. .

  Also in the present embodiment described above, attention is paid to the fact that the metal contained in the shredder dust of the disposal vehicle and the waste other than the metal are different from each other, and that some of the metals have different colors. Since the dust sorting can adjust the operating conditions of the air tables 13 and 14 based on the color, it is possible to cope with the change in the properties of the waste, and to improve the shredder dust sorting accuracy. It becomes possible.

  Next, the Example of the processing method of the metal containing waste which concerns on this invention is described. First, 650 kg of automobile shredder dust (ASR) was prepared, and wood chips and slaked lime were added. The ratio of ASR to wood waste was 70:30. In the heat treatment of the shredder dust, it is preferable to mix a woody granular material or crushed material, since the entanglement between the resin and the metal can be eliminated and the metal recovery rate is improved. Examples of the woody granular material or crushed material include vegetable fibers such as wood waste, bamboo waste, and coconut shell, and among them, wood waste is preferable because it can be easily pulverized when recovered together with light products.

  Next, ASR was charged into the Antler kiln heated to 325 ° C. at a charging rate of 30 kg / h to perform heat embrittlement treatment. After the treatment, 520 kg of embrittled shredder dust was obtained.

  Of the embrittled shredder dust obtained as described above, 510 kg was put into a hammer type crusher equipped with a screen having a mesh size of 8 mm for crushing treatment. After the treatment, 510 kg of embrittled shredder dust having a maximum particle size of 8 mm or less was obtained. In this embrittled shredder dust, the proportion of particles having a particle size range of 0.5 to 5 mm exceeded 60% by weight.

  In addition, when it was put into a hammer type crusher equipped with a screen having a 5 mm screen and subjected to crushing treatment, it was thought that there were many particles with a particle size of 0.5 mm or less, and precious metals were also finely pulverized. It was judged that it was not preferable. The particle size distribution before and after pulverization is shown in Table 1 below.

  505 kg of the crushed embrittled shredder dust can be used as a magnetic material (No. 1 magnetic material) and fuel as an iron raw material using a magnetic separator (hanging type) and a wind separator (internal circulation type) Lightweight (wind sorting dust) was removed. Subsequently, the magnetic deposit (No. 2 magnetic deposit) was removed as an iron raw material using a magnetic separator (hanging type).

  Next, by air table (TRIPLES / S DYNAMICS, INC. (USA)), it can be used as heavy products mainly containing precious metals (gold, silver) and copper, intermediate products mainly containing aluminum, and fuel. Light products mainly containing embrittlement such as resin were collected. Moreover, the dust mainly containing embrittlement materials, such as resin contained in the air which arises from an air table, was collect | recovered using the cyclone (cyclodust). To make the boundary between heavy products, medium products, and light products clear by the color of aluminum and copper on the air table, θ1 (end slope) is in the range of 2 to 15 ° and θ2 (side slope) is 0 to 6 Within the range of 0 °, the air introduction amount was adjusted within the range of 0.5 to 3 m / s, and the table frequency was adjusted within the range of 4 to 10 Hz according to the operating conditions.

  At the end of the air table, the boundary between the heavy product and the middle product and the boundary between the middle product and the light product were visually confirmed, and a partition plate was installed at the boundary portion. This resulted in a heavy product flow width of 75 mm, a medium product flow width of 225 mm, and a light product flow width of 1500 mm at the end of the total width of 1800 mm.

  Table 2 shows the bulk specific gravity and the content of each metal for the ASR, the embrittled product, the crushed product of the embrittled product, and the embrittled product charged into the air table.

  Table 3 shows the recovery results of each product after processing 505 kg of embrittled shredder dust after crushing in each sorting step.

  Table 4 shows the bulk specific gravity, total calorific value, and content of each metal for each product.

  Table 5 shows the distribution ratio of each metal for each product.

  From the results shown in Table 4 and Table 5, it can be seen that gold, silver and copper are contained in heavy products in large quantities and are useful as refining raw materials. The intermediate product contains copper and aluminum, but the quality is low. Therefore, a separate process for selecting copper and aluminum may be provided to make the refining raw material. Wind-powered dust (lightweight), light products, and cyclodust have a high calorific value, and can be used as fuel together with residues obtained by sorting copper and aluminum from medium products.

1, 100, 200 Processing device 2 Heating device 3 Crusher 4 Magnetic separator 5 Wind separator 6 Magnetic separator 7 Screen separator 8-14 Air table 8a Vibrating table 8b End portion 8c, 8d Partition plates D1-D6 Dust D7, D9 Fine grain D8, D11 Coarse grain D10 Medium grain H1-H7 Heavy product M1, M4, M7 Medium product L1-L7 Light product

Claims (10)

A method for treating metal-containing waste by supplying metal-containing waste to an air table for dry specific gravity sorting and recovering metal,
A method for treating metal-containing waste, wherein the operating conditions of the air table are adjusted based on the color of the waste on the air table.   The method for treating metal-containing waste according to claim 1, wherein the position of the partition plate attached to the discharge port of the air table is adjusted based on the color of the waste on the air table.   The method for treating metal-containing waste according to claim 1 or 2, wherein the metal-containing waste is crushed and then supplied to the air table.   The method for treating metal-containing waste according to claim 1, 2 or 3, wherein the metal-containing waste is heated and then crushed and then supplied to the air table. Magnetically sorting the crushed metal-containing waste to remove magnetic deposits,
The metal-containing waste from which the magnetic deposits have been removed is subjected to wind sorting to remove lightweight items,
Magnetically sorting the metal-containing waste from which the lightweight material has been removed to remove magnetic deposits,
The metal-containing waste treatment method according to claim 3 or 4, wherein the metal-containing waste from which the magnetic deposit has been removed is supplied to the air table.   The metal-containing waste from which the magnetic deposits have been removed after the light weight removal is screened and the metal-containing waste of a plurality of grain groups obtained by the screening is separately supplied to the air table. The processing method of the metal containing waste of Claim 5.   6. The method for treating metal-containing waste according to claim 5, wherein a heavy product obtained by supplying the air table is supplied to a second air table.   8. The metal-containing waste and another metal-containing waste having a metal content higher than that of the metal-containing waste are supplied to the first air table. Of metal-containing waste.   The method for treating metal-containing waste according to any one of claims 1 to 8, wherein the metal-containing waste contains a resin.   The method for treating metal-containing waste according to any one of claims 1 to 9, wherein the metal-containing waste contains aluminum and copper.