JP7101371B2 - Dry-type aluminum alloy sorting method and sorting system from dismantled aluminum sash scraps - Google Patents

Description

In the present invention, not only parts such as locks, pullers, and door rollers that have been recovered and mounted from demolition sites such as houses and buildings, but also screens of screen doors and scraps derived from wire rods of wire-filled plate glass may be mixed. It relates to a method of sorting aluminum alloys by a dry method from a large amount of dismantled aluminum sash scraps and a sorting system for carrying out the method.

In order to promote the recycling of aluminum scrap, there is a strong demand for a sorting method that can sort aluminum scrap derived from wrought material as wrought material with high quality.
For example, dismantled aluminum sash scraps generate a large amount of aluminum scraps, so if it becomes possible to sort aluminum sash materials with high quality from now on, it will be possible to stably supply them as raw materials to aluminum sash makers. Expected.
On the other hand, in Patent Document 1, it is proposed that a worker who is familiar with where the wrought material is used manually sorts and collects the wrought material portion for a used automobile. However, it is not profitable to carry out such manual work.
On the other hand, in Patent Document 2, first, as a pretreatment, the recovered material is crushed, and the crushed pieces are subjected to a vortex current repulsion type magnetic force sorter to separate and eliminate non-metals (rubber, plastic, wood chips), and then the first stage. The difference in transmission strength measured by the X-ray transmission type sorter is used for discrimination, and after separating and eliminating metals other than aluminum (iron, copper) and aluminum alloys with foreign matter, further It has been proposed to use a second-stage X-ray transmission type sorter to perform the same discrimination and sort aluminum alloys by alloy system.

Japanese Unexamined Patent Publication No. 2003-277837 Japanese Unexamined Patent Publication No. 2013-136019

Since the actual dismantled aluminum sash scraps are collected from the dismantling sites of houses, buildings, etc., not only the mounted locks, pullers, door rollers, etc., but also the screens of screen doors and even wire-filled plate glass. It is characterized by the fact that scraps derived from wire rods are often mixed in, and austenitic stainless steel, which is a type of stainless steel that is often used because of its ease of processing, typically SUS304, is used for door rollers. It is included in various shapes including housings, screws, nets and wires.
Therefore, some types of stainless steel have similar transmission densities of X-rays to aluminum, and the thinner the stainless steel, the more difficult it is to distinguish. Further, when the net and the wire are separated after being subjected to an X-ray transmission type sorter by a conventional air flow, they are likely to be tailgated by the aluminum alloys on the side to be normally skipped.
On the other hand, in Patent Document 2, although stainless steel is not particularly mentioned, iron and copper are sorted together as metals together with aluminum alloys after the crushed pieces are subjected to a vortex current repulsion type magnetic force sorter. Therefore, stainless steels will be selected as metals along with iron and copper.

Further, in Patent Document 2, when sorting metals, iron that may damage the belt or the like in a later process is also sorted together with copper, and the sorted aluminum alloys are arranged in a plate shape and sampled. Above, it has been proposed to use an X-ray transmission type sorter to sort by aluminum alloy system, but since the disassembled aluminum sash waste contains a significant amount and size of iron, it is sorted. There is a high possibility that the belt of the transport conveyor, which is commonly used in the system, will be damaged, and even if it is to sort to high quality, it is not profitable to carry out even the addition of a plate-shaped molding process.
Therefore, if the sorting method proposed in Patent Document 2 is applied as it is, it cannot be carried out in a profitable manner as a business targeting dismantled aluminum sash scraps.

The present invention has been made by paying attention to the above-mentioned conventional problems, and while making the best use of the idea of using the X-ray sorter described in Patent Document 2, it is matched with the actually collected disassembled aluminum sash waste. By devising the pretreatment, it is possible to sort aluminum alloys with high quality, and further, it is possible to finely discriminate aluminum alloys by alloy system and sort certain types of aluminum alloys with high quality. An object of the present invention is to provide a method for sorting aluminum alloys from aluminum sash scraps by a dry method.
Another object of the present invention is to provide a sorting system capable of carrying out the above-mentioned aluminum alloy sorting method.

The present invention has been made to solve the above problems, and the invention of [1] is a method for selecting aluminum alloys by a dry method from dismantled aluminum sash scraps, and each of the following (1) to (4). Process,
(1) A crushing process in which dismantled aluminum sash scraps are crushed by a uniaxial shredder crusher, and magnetism to stainless steel is naturally caused by crushing scratches.
(2) After the above (1), a magnetic force sorting step of separating and removing iron by subjecting the crushed pieces to a magnetic separator,
(3) After the above (2), an eddy current repulsive magnetic force sorting step of subjecting the crushed pieces to an eddy current repulsive magnetic force sorter to separate and eliminate magnetic stainless steels together with non-metals.
(4) After the above (3), it is characterized by having an X-ray sorting step of sorting aluminum alloys discriminated by an X-ray sorting machine that uses an X-ray sorting machine for discriminating the difference in permeation density by blowing them with an air flow. It is a sorting method to be done.
The invention of [2] is the method of selecting aluminum alloys from the dismantled aluminum sash scraps described in [1] by a dry method. It is a sorting method characterized by having a coarse crushing step of coarsely crushing by using a shredder crusher.

The invention of [3] is the method for selecting aluminum alloys from disassembled aluminum sash scraps by a dry method according to [1] or [2]. It is a sorting method characterized by including a wire rod or a thin plate.

The invention of [4] is the method for selecting aluminum alloys from disassembled aluminum sash scraps according to any one of [1] to [3] by a dry method. Further, (5) after (4), aluminum alloys This is a sorting method comprising an X-ray sorting step of sorting by alloy system through an X-ray sorting machine using the difference in transmission density for discrimination.

The invention of [5] is characterized in that, in the method for selecting aluminum alloys from dismantled aluminum sash waste by a dry method according to [4], the 6063 alloy (63S) is selected and recovered in the above (5). It is a sorting method.

The invention of [6] is a sorting system composed of an apparatus capable of carrying out each step in the dry-type aluminum alloy sorting method from dismantled aluminum sash scraps according to any one of [1] to [5].

According to the dry aluminum alloy sorting method from the dismantled aluminum sash scraps of the present invention, aluminum alloys can be sorted with high quality from the actually recovered dismantled aluminum sash scraps, and the aluminum alloys can be sorted by alloy system. It is possible to further discriminate and select a predetermined type of material with high quality.
Further, according to the sorting system of the present invention, the above method can be actually carried out as a business.

It is a part of the schematic block diagram of the sorting system which concerns on embodiment of this invention. It is a part of the schematic block diagram of the sorting system which concerns on embodiment of this invention. It is a part of the schematic block diagram of the sorting system which concerns on embodiment of this invention. It is a part of the schematic block diagram of the sorting system which concerns on embodiment of this invention. It is a part of the schematic block diagram of the sorting system which concerns on embodiment of this invention. This is a photograph of dismantled aluminum sash scraps. It is a photograph of stainless steel scraps mixed in FIG. 6. It is a photograph of the crushed pieces separated and eliminated in the primary magnetic separation process. It is a photograph of the crushed pieces separated and eliminated in the secondary magnetic separation process. It is a photograph of crushed pieces separated and eliminated in the eddy current repulsion type magnetic force sorting process. It is a photograph of crushed pieces separated and removed by a sieving vibration feeder. It is a photograph of the crushed piece of mixed metal sorted by the primary X-ray sorting process. It is a photograph of the crushed pieces of the 6063 alloy (63S) system and other aluminum alloys sorted in the secondary X-ray sorting step. It is a photograph of the result of sorting by the aluminum alloy series sorted by the advanced laser sorting process. It is a photograph of the result of sorting by the aluminum alloy series sorted by the advanced laser sorting process.

The method for sorting aluminum alloys from dismantled aluminum sash scraps according to an embodiment of the present invention is carried out by the sorting system shown in FIGS. 1 to 5, and the process content is set for each step. Will be explained below.
As shown in FIG. 6, the dismantled aluminum sash waste to be processed in the present invention includes not only parts such as locks, sliding doors, and door rollers mounted on the aluminum sash, but also screen door nets and wire-filled plate glass. In many cases, scraps derived from wire rods are also mixed.
Therefore, when viewed as a metal material, not only the main aluminum wrought material, but also aluminum alloys (casting material, die cast material), iron, stainless steel including austenite, copper, zinc, brass, and even aluminum alloy. Aluminum with foreign matter with another metal attached to the class is combined. Also, when viewed as a shape, there are various shapes such as a plate shape, a lump shape, a screw, a net, and a wire rod. In particular, it should be noted that, as shown in FIG. 7, stainless steels processed into various shapes are mixed. The final selection is made of aluminum sash.

[Crushing process]
The dismantled aluminum sash waste is divided into two stages, coarse crushing and fine crushing, and both are crushed by a shredder crusher.
In coarse crushing, a twin-screw shredder crusher is used to sandwich the dismantled aluminum sash waste, which is the crushed material, between two rotating blades and crush it so that it tears like scissors. For example, PreShred 4000M manufactured by Metso Denmark is used. The coarse crushing width is 300 mm or less.
In fine crushing, a uniaxial shredder crusher is used to sandwich the crushed material between the rotary blade attached to the rotating rotor and the fixed blade attached to the main body, and press the crushed material against the rotary blade to scrape it off. Crush like. For example, the idle type KE400 manufactured by Kubota Co., Ltd. is used. The crushing width is 10 to 100 mm, preferably about 40 mm.
All shredder crushers are crushed by cutting, and the wrought material containing plate-shaped aluminum is rolled up and discharged as it is without being agglomerated.
On the other hand, in fine crushing, a large number of crushing scratches are formed by the pressing action peculiar to the uniaxial shredder crusher. Of the stainless steels, only austenitic stainless steel is originally non-magnetic, but it has the property of becoming magnetized and magnetic when it hardens due to processing or scratches. Therefore, although some of them are already magnetized, such as bis, they are naturally magnetized by this crushing wound. In particular, the thin plate-shaped objects, nets, and wire rods that make up the housing of the door roller and the pedestal of the lock are easily bent or scratched at the edges, and are more easily magnetized by that amount.

[Primary magnetic separation process]
The crushed pieces obtained by crushing are conveyed by a conveyor, dispersed by a vibration feeder, and then separated and removed by a magnetic separator in a uniaxial shredder crushing facility.
By using this magnetic separator to separate and remove iron scraps and aluminum with iron having strong magnetism in advance, damage to the belt and the like in the subsequent process can be avoided. As the magnetic separator, for example, Kanetec Co., Ltd. (electromagnetic type) is used.
In this step, as shown in FIG. 8, iron scraps, aluminum with iron, and further sieving powder are separated and eliminated.

[Sieving process]-[Secondary magnetic separation process]
The crushed pieces from which the iron scraps have been separated and removed are sieved, and the powdered pieces are separated and removed as sieving powder (φ10 mm under). At this stage, small screws and even extremely small cut nets and wires are separated and removed as sieving products. In addition, by performing wind sorting, fibers such as iron powder and cotton are removed to prevent contamination with crushed pieces.
Further, the iron scraps that could not be removed due to the lumps that are easily rolled due to the disassembly in the primary magnetic sorting step are separated and eliminated by re-applying the suspension type magnetic separator during the transportation on the conveyor. As the magnetic separator, for example, a magnetic separator manufactured by Nippon Magnetics Co., Ltd. (permanent magnetic type) is used.
In this step, as shown in FIG. 9, iron scraps are separated and removed.

[Eddy current repulsion type magnetic force sorting process]
The crushed pieces from which iron scraps have been separated and removed through a two-step magnetic separation step are dispersed by a vibration feeder and then applied to an eddy current repulsion type magnetic force sorter 1.
The eddy current repulsion type magnetic field sorter 1 is formed in a columnar shape, and has a drum in which N poles and S poles are alternately provided in the circumferential direction on the peripheral surface, a conveyor belt wound around the drum, and a partition plate. It is configured to provide a thrust to pop out non-magnetic conductive metals by the interaction between the induced current and the moving magnetic field generated by the electromagnetic induction action of the moving magnetic field due to the rotation of the drum. It is designed to give adsorption power. The eddy current repulsion type magnetic force sorter 1 uses, for example, the model number MSS390S (eccentric type) manufactured by Mitsubishi Nagasaki Kiko Co., Ltd. In the case of this eddy current repulsion type magnetic force sorter 1, the rotation speed of the drum 11 is 2,500 to 3,000 rpm, the speed of the belt 12 is 70 to 90 m / min, and the partition angle (θ) of the partition plate 13 is 40 to. The recommended setting is 60 °.

Metals other than iron contained in dismantled aluminum sash scraps are aluminum alloys (extended materials, casting materials, die cast materials), stainless steels including austenite, copper, zinc, and brass, and stainless steel is generally magnetic. However, austenite stainless steel is inherently non-magnetic. However, as described above, a thin plate-like material, a net, or a wire rod that is magnetic enough to be adsorbed is adsorbed on the drum 11.
Therefore, by applying it to the eddy current repulsion type magnetic force sorter 1, thin plate-shaped austenitic stainless steel materials, lightweight materials such as nets and wires, and non-rubber waste, wood waste, fiber waste, plastic waste, etc. Separate and eliminate together with metal dust. Furthermore, stainless steel and dust can be separated by subjecting them to a stainless steel sorter, and the stainless steel can be reusably collected.
In this step, as shown in FIG. 10, stainless steel and dust are separated and removed. The stainless steels on the right side of FIG. 10 refer to thin plates, nets, and wire rods that are magnetic enough to be attracted by the magnetism of SUS304.

[Primary X-ray sorting process]
The crushed pieces from which the magnetic metal and the like have been separated and eliminated through the eddy current repulsion type magnetic force sorting process are passed through a sieving vibration feeder (φ20 mm under) to make fine crushed pieces, for example, made of stainless steel, which is a non-magnetic metal as shown in FIG. After sieving small pieces of screws, copper, brass, zinc, castings, and die-casting materials, put them in an X-ray sorter.
The X-ray sorter uses an air blow method for sorting, discriminating crushed pieces containing aluminum alloys by utilizing the difference in transmission density, and blows the discriminated aluminum alloys by an air flow to drop them in a distant place.
As the X-ray sorter, for example, two types of sorters having a model number XPERT1200 manufactured by PELLENC ST can be used. It is equipped with a transport conveyor, an X-ray source device, an X-ray sensor, a discriminator, and a distributor. The transport conveyor places the supplied crushed pieces on a belt and transports them to the distributor through the position of the X-ray sensor. .. The X-ray source device is installed above the belt, and the X-ray sensor is installed below the belt. Measure. The discrimination device discriminates between aluminum alloys and other metals based on the difference in X-ray transmission intensity.
Non-ferrous metals with a larger atomic weight than aluminum alloys have a lower permeability, so by setting conditions for sorting aluminum alloys, non-ferrous metals consisting of copper, zinc, brass and aluminum with foreign matter can be used. That is, mixed metals can be reliably distinguished from different ones.
In addition, among austenitic stainless steels, nets and wires that are easy to accompany, and thin plate-shaped ones that are difficult to distinguish have already been separated and excluded, and the remaining relatively thick ones have similar transmission densities as materials. However, since the austenitic stainless steel that is discriminated at this stage is relatively thick, it is highly reliable that it is different from the aluminum alloys like the above-mentioned metals. Also, there are few missed shots.
In this step, as shown in FIG. 12, the mixed metal is separated and eliminated. The stainless steel (mixed metal) remaining up to this stage is accurately recovered for the above reasons.

[Secondary X-ray sorting process]
The crushed pieces of aluminum alloys sorted through the primary X-ray sorting step are dispersed by a vibration feeder and then subjected to an X-ray sorter.
This X-ray sorter is the same type as that used in the primary X-ray sorting step, and is similarly discriminated by the difference in X-ray transmission intensity. In this step, as described in Patent Document 2. It is possible to discriminate accurately among aluminum alloys by using a statistical method to discriminate from the distribution state of a large number of measurement results.
Therefore, as shown in FIG. 13, the crushed pieces are sorted into an 6063 alloy (63S) and an aluminum alloy other than 63S. The 2,000 series and 7,000 series containing copper and zinc, which are wrought aluminum alloys other than 63S and have similar discrimination regions, can be discriminated with high accuracy due to the difference in transmittance. The transmittances of 1,000, 3,000, 4,000, 5,000, and 6,000 series other than 63S are similar and may be mixed, but a small amount of mixing is possible. There is no particular effect on the sash material components. That is, in the present application, a small amount of 1,000-series, 3,000-series, 4,000-series, 5,000-series, and 6,000-series is found to be mixed as unavoidable impurities in "63S". ing.
Other aluminum alloys are aluminum alloys for casting and aluminum alloys for die casting, and these and the 2,000 series and 7,000 series can be recycled as casting materials.
The crushed pieces sorted on the 6063 alloy (63S) side are separated and removed by a magnetic force sorter in the magnetic force sorting step of the post-treatment to separate and remove a small amount of dust that has still been mixed, and then the high-quality sorted products are packed in flexible containers. This completes the sorting and collection. As this magnetic force sorter, for example, the model number MS03900DT (concentric type) manufactured by Mitsubishi Nagasaki Kiko Co., Ltd. similar to the above-mentioned eddy current repulsion type magnetic force sorter 1 can be used. This eddy current repulsion type magnetic force sorter is a concentric type, but the same recommended settings as the eddy current repulsion type magnetic force sorter 1 are for the rotation speed of the drum, the speed of the belt, and the partition angle of the partition plate. ..

[Laser sorting process]
Since copper, zinc, and brass contained in the mixed metal separated and eliminated in the primary X-ray sorting step have similar X-ray transmission strengths, they cannot be sorted in the above primary X-ray sorting step. Sort and collect by metal material. This LIBS sorter 2 utilizes laser-induced breakdown spectroscopy, a sorting technique commonly known as LIBS, which generates plasma on the surface of an object by laser irradiation, and the components and amounts contained from the wavelength of the light. To measure. For example, model number MOE201901 manufactured by SECOPTA can be used. The LIBS sorter 2 is equipped with a cleaning laser for adjusting the state of the measurement surface, which is necessary for measuring the metal element contained in the sample. Therefore, the content of the element is measured by irradiating the cleaned portion with the LIBS laser and reading the generated plasma after removing the deposits (dirt) on the surface of the material with the cleaning laser. The mixed metal carried on the belt of the conveyor 21 is irradiated with the above-mentioned laser from the LIBS sorter 2 to measure the element content.
A collection unit is provided on the downstream side of the LIBS sorter 2, and the collection unit is provided with a set of an air nozzle 22 for air blowing means and a collection port for the collection container 23 for each metal type, sandwiching the conveyor 21. Has been done. Therefore, when the mixed metal carried on the belt of the conveyor 21 is, for example, zinc, air is ejected from the air nozzle 22 corresponding to the collection port connected to the zinc recovery container 23, and the mixed metal is used. It is blown off and dropped into a zinc container for recovery. Aluminum with foreign matter is transported to the end and dropped and collected from the end of the belt.

As a method using a laser, Japanese Patent Application Laid-Open No. 2019-69445 proposes a method for selecting an aluminum material. In this method, light reflectance data obtained by measurement, particularly optical spectrum image data, is used. By collating with the registered database for the light reflectance of various metals, the metal type contained in the aluminum alloy and its content are obtained, and the type of the aluminum alloy is specified from it. Is different.
Japanese Unexamined Patent Publication No. 2019-52884 proposes a method for discriminating metal scrap using a laser-induced plasma emission analysis method, a metal scrap discriminating device, and a metal scrap sorting system, which are based on the present invention.

[Advanced laser sorting process]
Also in this sorting step, the metal materials can be sorted and collected by the LIBS sorter 2. Aluminum structural materials that make up aluminum sashes, etc. are sorted according to the degree of concentration of additive elements that are characteristic of each system, but this is a trace analysis. Moreover, the aluminum material is treated with alumite to protect it with an anodized film, and a large number of holes formed in the alumite film are sealed using a metal salt of cobalt or nickel, color alumite is applied, or alumite is used. It is covered with various coatings, such as painting on it as a base.
Since the dismantled debris is collected while being covered with such a film, the film remains even after removing the deposits (painting, dirt) on the surface of the material with a cleaning laser, but the LIBS laser has a pulse. Since it is a laser, it is possible to irradiate the same spot twice. Therefore, using this pulse characteristic, the film is removed by the first irradiation to expose the surface of the aluminum material, plasma is generated on the surface of the object by the second irradiation, and the component contained from the wavelength of the light. And measure the amount. By adopting a method in which the dismantled waste is stationary during laser irradiation and moved after measurement, the above-mentioned double irradiation becomes easy.
The film of the aluminum sash, especially the anodic oxide film, is a part of the aluminum bullion that has been altered, and it is difficult to peel off and remove it by a mechanical method because it is due to the interatomic bond between aluminum and oxygen. It can be easily removed by using the laser irradiation.
By devising in this way, as shown in FIG. 14, from the 6063 alloy (63S) sorted in the secondary X-ray sorting step, the 1,000 series, the 3,000 series, and the 4,000 series, It is possible to sort out 5,000-series and 6,000-series wrought materials, and even if the quality required by the take-back side is higher than the current one, it can be handled.
This double irradiation may be adopted in the above-mentioned selection stage of the mixed metal. This is because mixed metals contain various metals including aluminum, and these materials are rarely exposed at the stage of commercialization, and usually some kind of coating is applied.

Currently, automobile manufacturers are actively working to reduce the weight, and as part of this, the replacement rate of aluminum alloys for panels is increasing, but the aluminum alloys used for outer panels are mainly 5,000. In order to promote the recycling of aluminum scrap, including the dismantled aluminum panel scraps of automobiles that are number series and 6,000 series and will be scrapped in the future, these 5,000 series and 6,000 series It is necessary to establish a sorting method that can sort wrought aluminum alloys.
It is expected that the 5,000-series and 6,000-series can be sorted with high quality by the above-mentioned advanced laser sorting process from the dismantled scraps of the outer panel of the automobile.
Further, according to this advanced laser sorting step, the 2,000 series and the 7,000 series sorted and removed in the above secondary X-ray sorting step can be further sorted as shown in FIG. In addition, wrought materials of 1000 to 7000 series can be sorted by product number with different component ratios. For example, 7003 alloy and 7075 alloy can be highly sorted by different component ratios, and new applications are expected. To.

Although the embodiment of the present invention has been described in detail above, the specific configuration is not limited to this embodiment, and the invention may be changed even if there is a design change within a range not deviating from the gist of the present invention. included.

The 6063 alloy (63S) sorted product sorted and recovered by carrying out the sorting method according to the above embodiment from the dismantled aluminum sash waste was subjected to a dissolution test to confirm the chemical composition, and the results were as follows.
From this result, it was confirmed that the 6063 alloy (63S) sorted product is of high quality that can be sold as a raw material to aluminum sash makers. The amount of dismantled aluminum sash waste input was 397,360 kg, the 6063 alloy (63S) sorted product was 317,977 kg, and the recovery rate was 80.02%.

1 ... Eddy current repulsion type magnetic force sorter 11 ... Drum 12 ... Belt 13 ... Partition plate 2 ... LIBS sorter 21 ... Conveyor conveyor 22 ... Air nozzle 23 ... Recovery container

Claims (6)

A method for sorting aluminum alloys from dismantled aluminum sash waste by a dry method, which comprises the following steps (1) to (4).
(1) A crushing process in which dismantled aluminum sash scraps are crushed by a uniaxial shredder crusher, and magnetism to stainless steel is naturally caused by crushing scratches.
(2) After the above (1), a magnetic force sorting step of separating and removing iron by subjecting the crushed pieces to a magnetic separator,
(3) After the above (2), an eddy current repulsive magnetic force sorting step of subjecting the crushed pieces to an eddy current repulsive magnetic force sorter to separate and eliminate magnetic stainless steels together with non-metals.
(4) After the above (3), an X-ray sorting step of sorting aluminum alloys discriminated by an X-ray sorter that uses an X-ray sorter for discriminating the difference in permeation strength by blowing them with an air flow. In the method for selecting aluminum alloys from dismantled aluminum sash scraps according to claim 1, a dry method.
A sorting method comprising: (0) a coarse crushing step of coarsely crushing dismantled aluminum sash waste by a twin-screw shredder crusher before the fine crushing step of (1). In the method for selecting aluminum alloys by a dry method from the dismantled aluminum sash waste according to claim 1 or 2.
A sorting method characterized in that the stainless steels of the dismantled aluminum sash scraps include austenitic stainless steel nets, wires, or thin plates. In the method for selecting aluminum alloys from dismantled aluminum sash waste by a dry method according to any one of claims 1 to 3.
In addition,
(5) A sorting method comprising: after the above-mentioned (4), an X-ray sorting step of sorting aluminum alloys by alloy system by an X-ray sorting machine using the difference in transmission strength for discrimination. In the method for selecting aluminum alloys from dismantled aluminum sash scraps by a dry method according to claim 4.
The sorting method according to (5) above, wherein the 6063 alloy (63S) is sorted and recovered. A sorting system composed of an apparatus capable of carrying out each step in the method for sorting aluminum alloys by a dry method from the dismantled aluminum sash waste according to any one of claims 1 to 5.

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