JP3996791B2 - Sorting method and sorting apparatus - Google Patents

Description

【００３５】
【表２】

【００３６】
実施例２〜５および比較例３〜４
廃棄自動車を一般的な工程でシュレッダー処理したのちのシュレッダーダストを原料にした。このシュレッダーダスト中の銅の重量比率は４％であった。表３に示す熱分解条件(ただし、雰囲気酸素濃度は０．１％未満である)で炭化させて生成した残さを回収し、ボールミルで破砕したのち、１４７μｍの篩い目を用いて、振動数を３０ｋＨｚに設定するともに、振動篩いの傾斜角度を５度に設定して篩い分け処理を行なった。その結果を表３に示す。表３から本実施例２〜５は、比較例３〜４に比べて実用化が可能であることがわかる。
【００３７】
【表３】

【００３８】
【発明の効果】
以上説明したとおり、本発明によれば、超音波を利用することにより、従来の振動ふるいに比べて、炭化した混合体から樹脂炭化物と金属粉を効率よく選別することができる。このため、選別能力およびバッチ処理能力ともに大幅に向上させることができたため、工業的実用化が可能である。
【図面の簡単な説明】
【図１】本発明の選別装置の一実施の形態を示す断面図である。
【図２】図１の振動板の平面図である。
【図３】本発明の選別装置の他の実施の形態を示す断面図である。
【図４】本発明の選別装置のさらに他の実施の形態を示す部分断面図である。
【図５】本発明の選別装置のさらなる他の実施の形態を示す部分断面図である。
【図６】従来の選別装置の一例を示す正面図である。
【符号の説明】
１ 搬送手段
２ 粉砕手段
３ メッシュ部を有する振動板
４ 超音波発生手段
５、６ 収集箱
７ 収集部材
８ 防塵部材
９ ベルト
１０ａ 上ロール
１０ｂ 下ロール
１１ ロール軸
１２ 昇降部材
１３ 振動枠
１４ メッシュ部
１５ａ 振動子
１５ｂ ホーン
１５、２１ 振動部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sorting method and a sorting apparatus. More specifically, a sorting method capable of efficiently sorting resin carbide and metal powder from a mixture (carbide) obtained by heat-treating shredder dust, which is a mixture of resin and metal powder, for example, non-ferrous metal (such as Cu) powder, and It relates to a sorting device.
[0002]
[Background Art and Problems to be Solved by the Invention]
2. Description of the Related Art Conventionally, there are apparatuses and methods for selecting a mixture of substances having different densities (specific gravity) using vibration, wind power, or the like. For example, a casing having a separation target input port, a separation product discharge port, an air inlet and an air discharge port, a sieve provided in an inclined manner in the casing, and maintaining the inclination angle of the sieve constant. A driving means for vibrating to give an acceleration force; a means provided at the lower part of the casing for discharging a small particle having a large apparent specific gravity; and through the air inlet of the casing. There is an apparent specific gravity difference device provided with a blowing means capable of blowing air to the lower surface and a rectifying plate that equalizes the wind pressure caused by the air flow (see Japanese Patent Application Laid-Open No. Hei 8-141508). This device is basically sorting by wind power, and the screen is tilted at a certain angle, and the sorting method using this device is a rotating vibration that floats light things with wind force and gives heavy things to the screen. It is separated using. Therefore, it is considered that the processing capability is low due to batch processing. Also, from the viewpoint of equipment, a blower means is required, and an air rectifying plate and a rotary vibration device are required, resulting in a complicated configuration. In addition, since this apparatus uses apparent specific gravity sorting by wind power, even if roughly four types of sorting are possible, it seems very difficult to quantitatively determine and sort the boundaries. For example, if a small copper powder is hardened with a resin carbide, the copper powder is recovered on the carbide side, so that it is difficult to select an accurate particle size.
[0003]
In addition, as another sorting device, a casing having an inlet into which dry waste is introduced, and an air flow that is disposed at an inclination angle of 11 to 15 ° inside the casing and flows from the back side toward the front side. A plurality of ventilation holes for passing through, a vibration plate that rotates and vibrates in a direction to move the non-burning waste in the input dry waste, and has a plurality of serrated ridges on the surface side, and a vibration plate There is a combustible waste sorting machine provided with an incombustible waste discharge port provided on the high side of the diaphragm and a combustible waste discharge port provided on the low side of the vibration plate (see JP 2001-145854 A). This apparatus has a sawtooth-like convex part on the screen, and uses a wind power selection method using wind power and rotational vibration applied to the screen. Therefore, since the difference in apparent specific gravity is used, it has the same problem as the device according to the difference in apparent specific gravity, and the vibration frequency is as low as 3.3 to 6.7 Hz. It is also possible to have dust and other features.
[0004]
In view of the above circumstances, the present invention provides a sorting method and a sorting device capable of efficiently sorting and collecting resin carbide and metal powder from carbide and metal powder of a mixture of resin and metal powder. For the purpose.
[0005]
[Means for Solving the Problems]
Selection method of the present invention is a screening method for selecting and recovered the carbide and metal powders of the mixture of resin and metal powder, the resin carbide and metal powder, the weight change of the resin volatiles before and after carbonization rate performs thermal decomposition process is 90% or more, it was caused resins, as well as put the diaphragm is installed at a predetermined inclination angle, characterized by applying ultrasonic vibration to the vibrating plate.
[0006]
Further, the screening method of the present invention includes a resin carbide and metal powder produced by subjecting a mixture of resin and metal powder to a thermal decomposition treatment in which the weight change rate of resin volatiles before and after carbonization is 90% or more. a screening method for selecting and recovered them of a mixture of, as well as put the diaphragm installed the resin carbide and metal powder in a predetermined tilt angle, to apply ultrasonic vibration to the vibrating plate It is characterized by that.
[0007]
Furthermore, the sorting device of the present invention is a sorting device that sorts and collects carbide and metal powder of a mixture of resin and metal powder, and is installed at a predetermined inclination angle. A vibration plate in which resin carbide produced by thermal decomposition treatment with a weight change rate of resin volatiles before and after carbonization treatment of 90% or more is charged, and generation of ultrasonic waves that impart ultrasonic vibration to the vibration plate means, Ri Na includes a collecting box for collecting and sorting the resin carbide and metal powder, respectively, to said collecting member and / or dustproof member, and the vibration of the ultrasonic wave generating means for applying ultrasonic waves provided and wherein such Rukoto.
[0008]
The sorting device of the present invention is a sorting device that sorts and collects fine resin carbide and metal powder after pulverizing a mixture of resin and metal powder, and is installed at a predetermined inclination angle. And a diaphragm into which the resin carbide and metal powder are charged, an ultrasonic generator for applying ultrasonic vibration to the diaphragm, and a collection box for selecting and collecting the resin carbide and metal powder, respectively. It is characterized by.
[0009]
In addition, as a condition of the carbonization treatment performed as a pre-selection step, a step of performing a thermal decomposition treatment in which the weight change rate of resin volatiles before and after the carbonization treatment is 90% or more is used. Moreover, it is preferable to perform the thermal decomposition treatment in an atmosphere where the temperature during carbonization is 300 ° C. or higher and oxygen is not substantially present.
[0010]
Here, the weight change rate of the resin volatile matter is the weight of volatile matter after treatment when the volatile matter weight in the raw material before carbonization treatment, that is, pyrolysis dry distillation treatment in an inert gas atmosphere is 100. It means the ratio of the amount volatilized from the raw material. That is, it means the removal rate of resin volatiles.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
In the present invention, for example, when the shredder dust, which is a mixture of resin such as polyethylene and metal powder such as non-ferrous metal (such as Cu) powder, is disposed of, the mixture is carbonized to be reused. After pulverizing the prepared mixture, only the resin carbide is refined, and then the refined resin carbide and metal powder are efficiently sorted using ultrasonic vibration.
[0012]
By applying ultrasonic waves to a diaphragm into which the resin carbide and metal powder are charged, for example, a square inclined screen, the frictional resistance between the mesh portion of the diaphragm and the carbide is greatly reduced, so even if the mesh size is about 100 μm. Sorting is possible and fluidity is improved by ultrasonic vibration, which leads to an improvement in the ability of sorting processing.
[0013]
Furthermore, by applying ultrasonic waves to the incidental equipment such as resin carbide collecting members and dustproof members, the diaphragm and the collecting members and / or the dust pressure generated within the dustproof members greatly increases the ability of the sieve. Can be improved.
[0014]
When an ultrasonic wave is applied to a plate, a standing wave is generated on the plate, so that a longitudinal vibration sound pressure is generated radially from the plate surface where the standing wave vibrates. This sound pressure is called radiation pressure.
[0015]
As a condition for the carbonization treatment performed as a pre-screening process, the screening ability can be improved by performing a thermal decomposition treatment in which the weight change rate or removal rate of the resin volatiles before and after the carbonization treatment is 90% or more. This is because if the weight change rate of the volatile component is less than 90%, the sorting step is entered with the resin and the metal being welded, and it becomes difficult to perform the above-described sorting function.
[0016]
It has also been found that the above-described resin and metal are not welded by performing the thermal decomposition treatment in an atmosphere where the temperature during the carbonization treatment is 300 ° C. or higher and oxygen is not substantially present. Note that in this specification, an atmosphere in which oxygen is substantially absent refers to an atmosphere in which the atmospheric oxygen concentration is less than about 0.1%.
[0017]
Hereinafter, a sorting method and a sorting apparatus of the present invention will be described with reference to the accompanying drawings.
[0018]
As shown in FIG. 1, a sorting apparatus according to an embodiment of the present invention includes a conveying means 1 for conveying a mixture M, a metal powder M1a and a refined resin carbide M1b described later, and the mixture M. A pulverizing means 2 for pulverizing and refining the carbide, a vibration plate 3 for sieving the metal powder M1a and the finely divided resin carbide M1b, and an ultrasonic wave generating means 4 for applying ultrasonic waves to the vibration plate 3 are provided. ing. In the lower part of the diaphragm 3, collection boxes 5 and 6 for collecting the sieved metal powder M1a and resin carbide M1b are arranged. A collecting member 7 is installed on the back side of the diaphragm 3, and a dustproof member 8 is arranged on the front side of the diaphragm 3. For example, metal powder M1a has an average diameter of 0.2 to 0.3 mm and a length of 5 to 10 mm, and resin carbide M1b has an average diameter of 50 to 100 μm. In FIG. 1, F is the rotational direction.
[0019]
As the transport means 1, a normally used belt conveyor device or the like can be used.
[0020]
The crushing means 2 is composed of an upper roll 10a and a lower roll 10b arranged in a pressurized state at upper and lower parts of the belt 9, and a drive motor (not shown) for driving the lower roll 10b. Further, in the present embodiment, in order to maintain a predetermined pulverization pressure on the roll shaft 11 of the upper roll 10a and to make the resin carbide finer when the mixture M is pulverized, for example, to have a predetermined particle size. An elevating member 12 is provided that allows the upper roll 10a to move upward so that the pulverization pressure can be adjusted. The elevating member 12 also functions as a shock absorber that prevents an overload applied to the upper and lower rolls 10a and 10b due to the intrusion of a large mixture M or a hard mixture M between the upper and lower rolls 10a and 10b. The material of the upper roll 10a is preferably a soft roller such as a rubber roller so that it can follow the shape of the mixture M to some extent. On the other hand, the lower roll 10b is preferably made of a highly rigid metal roll so that the lower roll 10b is rotated at a predetermined position below the belt 9.
[0021]
As shown in FIG. 2, the diaphragm 3 has a mesh portion 14 surrounded by a vibration frame 13 disposed inside. Further, since the metal powder M1a and the resin carbide M1b charged from the belt 9 can be screened by vibrating the diaphragm 3 in the horizontal direction, it can be held in a horizontal state. In the present embodiment, in order to enable the collection to be performed continuously, it is installed at a downstream position of the conveying means 1 with a predetermined inclination angle θ. Further, the shape of the diaphragm 3 is not particularly limited, and may be a rectangle or a circle, but a rectangle is preferable. Since the contact resistance between the metal powder M1a and the resin carbide M1b and the mesh portion 14 is small due to ultrasonic vibration, the fluidity is improved and the metal powder M1a and the resin carbide M1b are moved downward by inclining the diaphragm 3. This is because the effective distance L through which the mesh portion 14 flows can be long as long as the installation facility of the diaphragm 3 allows. Thereby, the capability of collection processing can be improved. The mesh size (mesh size of the mesh) of the mesh portion 14 is selected to be, for example, about 100 to 200 μm according to the selection size of the resin carbide and metal powder to be selected, or the selection efficiency (selection target). ) Which is 97 to 100%.
[0022]
In addition, the inclination angle θ of the diaphragm 3 can be determined experimentally, but can be in the range of about 1 to 30 degrees, for example. For example, if the inclination angle θ is too large, the throughput of the sieve increases but the efficiency decreases. On the other hand, if the inclination angle θ is too small, the processing amount is reduced but the efficiency is improved.
[0023]
As the ultrasonic wave generation means 4, an ultrasonic wave generator including an ultrasonic pulse generator and a vibration part 15 including an ultrasonic vibration oscillation vibrator 15 a and an amplitude amplification horn 15 b can be used. The optimum frequency of ultrasonic vibration is, for example, 15 KHz or more, preferably 20 KHz or more. The vibrating portion 15 is installed on the back surface of the diaphragm 3 and vibrates the mesh portion 14 of the diaphragm 3 with ultrasonic waves. Since the ultrasonic wave emitted from the vibration part 15 propagates through the vibration frame 13 and vibrates the mesh part 14, the vibration part 15 can be installed at an appropriate position on the entire circumference of the vibration frame 13. it can. By applying ultrasonic waves to the mesh portion 14, the fluidity of the metal powder M1a and the resin carbide M1b charged into the diaphragm 3 becomes very good, so that it is sufficiently screened before flowing into the collection boxes 5 and 6. It is done.
[0024]
In this embodiment, instead of imparting rotational vibration to wind power or a sieve as in the past, ultrasonic waves are imparted to the mesh portion of the diaphragm that is the sieve. Has generated radiation pressure by ultrasonic waves. Due to this radiation pressure, the fine particles vibrate vigorously. In addition, since it is said that a substance that is ultrasonically vibrated generally has a very small frictional resistance, it is very easy to use these synergistic effects if it is a fine particle that is smaller than the mesh size of the mesh part. It will pass through the eyes of the mesh part. Even if the fine particles are hardened, since vigorous vibration is applied, they are naturally pulverized by the force of ultrasonic waves and are easy to pass.
[0025]
The collecting member 7 and / or the dustproof member 8 is preferably provided with a vibrating portion 21. By making the frequency of the vibration part 21 the same as the frequency of the vibration part 15, the vibration plate 3, the collecting member 7 and / or the dust-proof member 8 are likely to cause a resonance phenomenon. As a result, the vibration of the diaphragm 3 itself is increased by the radiation pressure generated from the inner surface of the collecting member 7 and / or the dust-proof member 8, so that the sorting efficiency can be improved and dust or dust is attached (attached). Can also be prevented. Further, by connecting the collecting member 7 and the collecting box 6, the resin carbide M1b in the collecting box 6 can be continuously vibrated and conveyed using the vibration of the collecting member 7.
[0026]
In the present embodiment, a single-stage sorting apparatus including one diaphragm is used, but the present invention is not limited to this, and a multi-stage sorting apparatus including a plurality of diaphragms can be provided. For example, as shown in FIG. 3, in another embodiment, a second diaphragm having a second mesh portion 22 smaller in mesh size than the mesh portion 14 of the diaphragm 3 on the back side of the diaphragm 3. 23 can be connected by a continuous lever 24 to form a two-stage sorting device including two diaphragms 3 and 23. By such a two-stage sorter, large ones such as cores (copper wires) of vinyl copper wires containing the mixture M before carbonization, or residues (non-ferrous metals such as Zn, Sn, etc.) generated after carbonization And the like can be selected and collected in collection boxes 25a, 25b, and 25c, respectively.
[0027]
In the present embodiment, the mixture, the resin carbide and the metal powder are conveyed, the conveying means for feeding the resin carbide and the metal powder into the diaphragm, and the mixture is pulverized to pulverize the resin carbide. However, the present invention is not limited to this. For example, the raw material obtained by previously pulverizing the mixture into resin carbide and metal powder is introduced into the diaphragm from the supply hopper, thereby conveying means. In addition, the grinding means can be omitted.
[0028]
Next, another embodiment will be described. In this Embodiment, it can classify | select according to the difference in the flight distance by the difference in the density of resin carbide and metal powder using the radiation pressure of an ultrasonic wave. For example, as shown in FIG. 4, the sorting apparatus according to the present embodiment includes a diaphragm (diaphragm having no mesh portion) 31 having a substantially uniform thickness, an ultrasonic wave generating means 32, and a lower portion of the diaphragm 31. And a collection box 33 for collecting the metal carbide M3b installed at a predetermined distance from the diaphragm 31 and a collection box 34 for collecting the metal powder M3b. At least one chute 35 for reliably guiding the resin carbide M3a blown from the diaphragm 31 to the collection box 34 by the radiation pressure of the ultrasonic waves is provided. As a result, the metal powder M3b having a high density is collected in the collection box 33, and the resin carbide M3a having a low density is blown off by the ultrasonic radiation pressure and collected in the collection box 34. In the present embodiment, the dustproof member 36 can be installed in the same manner as in the previous embodiment. In addition, a vibration portion 37 can be provided on the dustproof member 36.
[0029]
Next, still another embodiment will be described. In this Embodiment, it can classify | select according to the difference in the levitation by the difference in the density of resin carbide and metal powder using an ultrasonic levitation force. For example, as shown in FIG. 5, the sorting apparatus according to the present embodiment is installed at a predetermined distance on the front side of the diaphragm 41, the ultrasonic wave generating means 42, and the diaphragm 41 having a substantially uniform thickness. And the collection boxes 44a, 44b, 44c for collecting the resin carbides M4a, M4b and the metal powder M4c installed at predetermined positions below the diaphragm 41 and the reflector 43, respectively. Further, between the collection boxes 44a, 44b, 44c and the diaphragm 41 and the reflection plate 43, the falling resin carbides M4a, M4b and the metal powder M4c are reliably guided to the collection boxes 44a, 44b, 44c. Chutes 45a, 45b and 45c are provided. As a result, when an ultrasonic wave is applied to the diaphragm 41, a standing wave sound field is formed in the air between the diaphragm 41 and the reflecting plate 43. Therefore, the resin carbide M4a having a low density at the position of the vibration node. After the resin carbide M4b is levitated, each is collected in the collection boxes 44a and 44b and sorted. Further, the metal powder M4c having a high density falls by its own weight along the vibration plate 41 and the chute 45c and is collected in the collection box 44c.
[0030]
Next, the present invention will be described based on examples, but the present invention is not limited to such examples.
[0031]
Example 1
As shown in Table 1, a mixture (carbide) obtained by firing a shredding dust of a mixture of polyethylene and copper was used as a material. And about 10 kg was used as the processing amount of this material. The mixing ratio of copper at this time was about 10%.
[0032]
Next, as shown in FIG. 6, the conventional sorting apparatus includes a vibrator 101 incorporating a vibration motor and a sorting container 103 installed on the vibrator 101 via a coil spring 102. A circular vibrating screen was prepared. This sorting container 103 has an eaves 104 installed inside, an input port 105 for supplying material to the top, a collection port 106 for recovering copper powder, and a collection port 107 for recovering resin carbide. is doing. Reference numeral 108 denotes a conical bottom portion of the sorting container 103.
[0033]
Next, as shown in Table 1, with respect to the sorting apparatus (Example) shown in FIG. 1 in which the mesh size is set to 100 μm and the circular vibration sieves (Comparative Examples 1 and 2) set to 100 μm and 400 μm, vibration sieves are used. The experiment was conducted. The results are shown in Table 2. From Table 2, it can be seen that this example can be put into practical use as compared with Comparative Examples 1 and 2.
[0034]
[Table 1]

[0035]
[Table 2]

[0036]
Examples 2-5 and Comparative Examples 3-4
The shredder dust after the waste car was shredded by a general process was used as a raw material. The weight ratio of copper in the shredder dust was 4%. After collecting the residue generated by carbonization under the pyrolysis conditions shown in Table 3 (however, the atmospheric oxygen concentration is less than 0.1%), crushing it with a ball mill, and using a 147 μm sieve mesh, While setting to 30 kHz, the sieving process was performed with the inclination angle of the vibration sieve set to 5 degrees. The results are shown in Table 3. From Table 3, it can be seen that Examples 2-5 can be put to practical use as compared with Comparative Examples 3-4.
[0037]
[Table 3]

[0038]
【The invention's effect】
As described above, according to the present invention, by using ultrasonic waves, it is possible to efficiently sort resin carbide and metal powder from a carbonized mixture as compared with a conventional vibration sieve. For this reason, since the sorting ability and the batch processing ability can be greatly improved, industrial practical application is possible.
[Brief description of the drawings]
FIG. 1 is a sectional view showing an embodiment of a sorting apparatus according to the present invention.
FIG. 2 is a plan view of the diaphragm of FIG.
FIG. 3 is a cross-sectional view showing another embodiment of the sorting apparatus of the present invention.
FIG. 4 is a partial sectional view showing still another embodiment of the sorting apparatus of the present invention.
FIG. 5 is a partial sectional view showing still another embodiment of the sorting apparatus of the present invention.
FIG. 6 is a front view showing an example of a conventional sorting apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Conveying means 2 Crushing means 3 Diaphragm 4 having mesh section Ultrasonic wave generating means 5 and 6 Collection box 7 Collection member 8 Dust-proof member 9 Belt 10a Upper roll 10b Lower roll 11 Roll shaft 12 Lifting member 13 Vibration frame 14 Mesh section 15a Vibrator 15b Horn 15, 21 Vibrating part

Claims (9)

A screening method for selecting and recovered the mixture of resin and metal powder, said the mixture of resin and metal powder, the pyrolysis resin volatiles weight change rate before and after carbonization is at least 90% performs processing, the resin carbide and metal powder which caused, with introducing the diaphragm is installed at a predetermined tilt angle, the vibration plate and the collection member being disposed on the rear side of said diaphragm having a mesh portion Sorting method to apply ultrasonic vibration to the surface. After pulverizing the mixture of the resin and the metal powder, the mixture of the refined resin and the metal powder is subjected to a thermal decomposition treatment in which the weight change rate of the resin volatiles before and after the carbonization treatment is 90% or more, of a mixture of Namaze tighten resin carbide and metal powder to a screening method of and recovered sorting them, introducing the diaphragm is installed mixture of the resin carbide and metal powder in a predetermined tilt angle In addition, a sorting method for applying ultrasonic vibration to the diaphragm having a mesh portion and a collecting member installed on the back side of the diaphragm.   The sorting method according to claim 1 or 2, wherein ultrasonic vibration is applied to a dust-proof member installed on the front side of the diaphragm. The sorting method according to any one of claims 1 to 3, wherein the diaphragm is installed in multiple stages . The sorting method according to any one of claims 1 to 4, wherein the thermal decomposition treatment is performed in an atmosphere in which a temperature during carbonization treatment is 300 ° C or higher and oxygen is not substantially present. A sorting apparatus for and recovered sorted mixture of resin and metal powder, while being installed at a predetermined inclination angle, the resin and the mixture in the carbonization treatment before and after the resin volatiles weight change of the metal powder A vibration plate in which a mixture of resin carbide and metal powder produced by a thermal decomposition treatment with a rate of 90% or more is charged, and generation of ultrasonic waves that impart ultrasonic vibration to the vibration plate having a mesh portion Means, a collecting member provided on the back side of the diaphragm, a dustproof member provided on the front side of the diaphragm, and a carbide and metal powder of a mixture of the resin and metal powder, respectively. Ri Na comprises a collecting box for collecting, the collecting member and / or dustproof member, Ru sorting device name with the vibration of the ultrasonic wave generating means are provided to impart ultrasonic waves. After the mixture of the resin and the metal powder is pulverized, the mixture of the refined resin and the metal powder is subjected to a thermal decomposition treatment in which the weight change rate of the resin volatiles before and after carbonization is 90% or more. a sorting apparatus for and recovered sorting resin carbides and metal powder occupies, while being installed at a predetermined inclination angle, the vibration plate and the carbide and metal powder mixture of the resin and the metal powder is introduced Ultrasonic generating means for applying ultrasonic vibration to the diaphragm having a mesh part, a collecting member provided on the back side of the diaphragm, a dustproof member provided on the front side of the diaphragm, Ri Na comprises a collecting box for collecting the mixture of resin and metal powder carbide and metal powder were sorted respectively, to said collecting member and / or dustproof member, the vibration of the ultrasonic wave generating means for applying ultrasonic Ru sorting device name provided with. The sorting apparatus according to claim 6 or 7, wherein the collecting member and / or the dust-proof member is provided with a vibrating portion of an ultrasonic wave generating means for applying an ultrasonic wave. The sorting apparatus according to any one of claims 6 to 8, wherein the diaphragm is installed in multiple stages .

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