Separation recovery method and separation recovery device of metal and resin material of metal film resin material

Abstract

To lower an absorption rate of resin powder with a metal film in crushed mixed powder, and separate the resin powder with the metal film from metal film powder or resin powder.SOLUTION: A separation recovery method of metal and a resin material of a metal film resin material includes: crushing a metal film resin material p to which a metal film is attached and producing mixed powder m; conveying a belt 9 where the mixed powder m is inclined and arranged while vibrating the belt 9; previously sliding down resin powder c and resin powder b' with a metal film having a low metal percentage content in a direction opposed to the conveyance direction on the belt 9 inclined in a state of exceeding a repose angle; adsorbing the metal film powder a and the resin powder b with the metal film having a high metal percentage content to a plate-like magnet 44; conveying the metal film powder a and the resin powder b in the upper direction the same as the conveyance direction of the belt 9 while being adsorbed to a roller 8 having the magnet 45, and separating and recovering metal and a resin material.SELECTED DRAWING: Figure 16

Description

Technical Field

[0001] The present invention relates to a recycling technology for mixtures of metals and synthetic resin materials such as resin-plated parts, and particularly to a method for separating and recovering metal raw materials and resin raw materials from resin-plated parts and reusing them as metal raw materials or resin raw materials respectively, and a metal and resin separation and recovery apparatus therefor.

Background Art

[0002] Regarding automobile door knobs, radiator grills, etc., conventionally, resin-plated products treated with metal plating or vapor deposition for the purpose of weight reduction and the like have been proposed as alternative materials for various metal parts. On the other hand, as a measure against environmental problems, recycling technologies for separating and reusing these resin-plated parts treated with metal into metal raw materials and resin raw materials have also been implemented.

[0003] Technologies for separating resin-plated parts into metal raw materials and resin raw materials have been proposed. As described in Japanese Patent Application Laid-Open No. 2002-28927 of Patent Document 1, "Method for Recovering Resin Granules and Resin Granules", for resin materials treated with metal, they are pulverized with a pulverizing device composed of a fixed blade and a rotary blade, and the pulverized granular materials are separated into a metal part and a resin part with a magnetic separation device, and a method for recovering resin granules has been proposed.

[0004] The magnetic separation device 101 used in this recovery method is, as shown in FIG. 19, equipped with a suspended-type strong magnet 102. The mixed granular materials of the metal coating, resin granules, and resin granules with metal coating pulverized by the pulverizing device are conveyed to a cushion tank 103, and the mixed granular materials are dropped onto a first conveyor 105 through a rotary valve 104 attached to the lower end of this cushion tank 103. Further, a second conveyor 106 is arranged at a position one stage lower. The strong magnet 102 of the magnetic separation device 101 is arranged to move between these first and second conveyors 105 and 106.

[0005] The strong magnet 102 of the magnetic separation device 101 adsorbs only the metal coating from the mixed powder being conveyed on the first conveyor 105 and conveys it to the metal raw material recovery tank 107. On the other hand, the mixed granular material from which the metal coating has been separated and which has mostly become resin granular material is dropped and recovered into the resin raw material recovery tank 108 by the second conveyor 106.

[0006] Furthermore, as in the Japanese Patent Application Laid-Open No. 2002-336732 "Magnetic Separation Device" of Patent Document 2, a technique has been proposed in which an endless belt is arranged at a predetermined interval in the vertical direction, and a magnetic substance (metal coating) is adsorbed from the pulverized mixed granular material by a permanent magnet. This magnetic separation device has a technical feature of preventing the re-adsorption of the once-adsorbed magnetic substance (metal coating) to the endless belt.

Prior Art Documents

Patent Documents

[0007]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0008] The mixture of metal and synthetic resin material such as resin-plated parts is not always of the same size. The small pulverized resin granular material is conveyed by the second conveyor 106 into the resin raw material recovery tank 108 without being adsorbed by the magnet 102. Furthermore, if there are large resin granular materials in the pile of pulverized mixture, the pulverized metal coating may be adsorbed and conveyed simultaneously with these large resin granular materials, and resin pulverized matter may be mixed into the metal raw material recovery tank. Therefore, there has been a problem that the separation efficiency tends to be low.

[0009] Conversely, if there are large metal film fragments, resin granules may be simultaneously adsorbed and transported together with these large metal film fragments, and the metal film may be mixed into the resin raw material recovery tank. There was a problem that when there was a large difference in the size (outer diameter) of the fragments, the separation efficiency tended to be low.

[0010] The inventor of the present invention focused on the "angle of repose" regarding the physical properties of the state in which soil or powder was deposited. The "angle of repose" is one of the physical property values used as an index representing the fluidity of powders and the like, and is the angle formed between the slope of a naturally formed mountain that does not collapse and the horizontal plane when the powder is gently deposited on a horizontal surface. The inventor of the present invention thought that by inclining the belt conveyor to a state exceeding the angle of repose, resin granules that are not adsorbed by the magnet during transportation are actively separated by falling, and the separation processing ability is enhanced.

[0011] The present invention was devised to solve such problems. That is, an object of the present invention is to provide a method for recovering metal from a metal-coated resin material that can adsorb and separate a resin powder with a metal coating in several stages from a pulverized mixed powder, and reliably separate this resin powder with a metal coating from a metal-coated powder or a resin powder, and regenerate highly pure metal raw materials and resin raw materials, and a metal coating recovery apparatus therefor.

Means for Solving the Problems

[0012] The falling type method of the present invention pulverizes a metal-coated resin material (p) to which a metal coating is attached to generate a mixed powder (m) of a metal-coated powder (a), a resin powder with a metal coating (b), and a resin powder (c). While transporting the mixed powder (m) with a belt (9) arranged in an inclined manner, first, the resin powder (c) slides down, and using magnetic force, the resin powder (c) and the resin powder with a metal coating (b) are separated from the metal-coated powder (a). Furthermore, while transporting these separated resin powder (c) and resin powder with a metal coating (b) with a belt (9) arranged in an inclined manner, first, the resin powder (c) slides down, and the resin powder (c) with a low metal content is separated and recovered using magnetic force. This is the gist of the present invention.

[0013] Also, in the dropping type method of the present invention, while transporting the resin powder (c) and the resin powder with a metal coating (b) on an inclined belt (9), first the resin powder (c) slides down, and when separating the resin powder (b') with a low metal content using magnetic force, using a magnet (10b) with a stronger magnetic force than the magnetic force of the magnet (10a) used when first separating the mixed powder (m), adsorbing the resin powder (b) with a metal coating and separating it from the resin powder (c), which is characterized by this.

[0014] The dropping type device of the present invention, in order to separate the mixed powder (m) of the pulverized metal-coated powder (a), resin powder (c), and resin powder with a metal coating (b), a rough sorting belt conveyor (7) equipped with a magnet (10a) on one of two rollers (8) over which the belt (9) is inclined and hung, and a separator (12) arranged below the conveyance destination of the rough sorting belt conveyor (7) for sorting the selected metal-coated powder (a) and resin powder with a metal coating (b) from the resin powder (c) and resin powder with a metal coating (b), and a precision sorting belt conveyor (13) equipped with a magnet (10b) on one of two rollers (8) over which the belt (9) is inclined and hung, arranged below the separator (12) for further sorting the resin powder (b) with a metal coating, and is characterized by comprising this. It can further be provided with a vibration device (34) for vibrating the belt (9) of the rough sorting belt conveyor (7). It can further be provided with an injection device (35) for injecting air above the belt (9) of the rough sorting belt conveyor (7).

[0015] In the suction type method of the present invention, the metal-coated resin material (p) with a metal coating attached is pulverized to generate a mixed powder (m) of the metal-coated powder (a), resin powder (c), and resin powder with a metal coating (b), While conveying the mixed powder (m) with an inclined belt (9), first the resin powder (c) slides down, and the metal-coated powder (a) and the resin powder (b) with a metal coating are adsorbed, lifted, separated, and recovered by the magnetic force of the plate-shaped magnet (44). At the same time, It is characterized in that the magnetic force of the plate-shaped magnet (44) is adjusted to vary the adsorption rate of the resin powder (b) with a metal coating.

[0016] When separating the metal-coated powder (a) and the resin powder (b) with a metal coating from the mixed powder (m), the interval (d) between the mixed powder (m), the metal-coated powder (a), and the resin powder (b) with a metal coating and the plate-shaped magnet (44) that adsorbs and lifts them is widened to reduce the adsorption rate of the resin powder (b) with a metal coating, thereby separating and recovering only the metal-coated powder (a) with a high metal content. Also, when separating the resin powder (c) and the resin powder (b) with a metal coating from the mixed powder (m), the interval (d) between the mixed powder (m), the metal-coated powder (a), and the resin powder (b) with a metal coating and the plate-shaped magnet (44) that adsorbs and lifts them is narrowed to increase the adsorption rate of the resin powder (b) with a metal coating, thereby separating and recovering even the resin powder (c) with a relatively high resin content.

[0017] The suction-type device of the present invention is provided with a conveyor belt conveyor (42) in which a belt (9) is inclined and spanned between two rollers (8) in order to convey a mixed powder (m) of a pulverized metal-coated powder (a), a resin powder (c), and a resin powder (b) with a metal coating, A metal adsorption belt conveyor (43) in which a belt (9) is inclined and spanned between two rollers (8) and is arranged above the conveyor belt conveyor (42), A plate-shaped magnet (44) provided on the inner surface of the lower belt (9) of the metal adsorption belt conveyor (43) for adsorbing and lifting the metal-coated powder (a) and the resin powder (b) with a metal coating. It is characterized in that it is configured so that the interval (d) between the conveyor belt conveyor (42) and the metal adsorption belt conveyor (43) can be adjusted.

[0018] The metal adsorption belt conveyor (43) is configured to raise and lower the conveying belt conveyor (42). The metal adsorption belt conveyor (43) is arranged such that the total length in its conveying direction is longer than the total length in the conveying direction of the conveying belt conveyor (42), and is configured to recover the adsorbed metal-coated powder (a) and resin powder with metal coating (b).

[0019] The metal adsorption belt conveyor (43) and the conveying belt conveyor (42) are arranged with a shift in the conveying direction, and are configured to recover the adsorbed metal-coated powder (a) and resin powder with metal coating (b). An injection device (35) for injecting air above the belt (9) of the conveying belt conveyor (42) can be further provided.

[0020] The sorting method of the present invention crushes the metal-coated resin material (p) with a metal coating to generate a mixed powder (m) of a metal-coated powder (a), a resin powder (c), and a resin powder with metal coating (b, b'), places the mixed powder (m) on an inclined belt (9) and conveys it while vibrating, first, the resin powder (c) and the resin powder with metal coating (b') having a low metal content rate are slid down downward in a direction opposite to the conveying direction on the belt (9) inclined beyond its angle of repose, the metal-coated powder (a) and the resin powder with metal coating (b) having a high metal content rate are adsorbed by a plate-shaped magnet (44) disposed on the inner surface of the belt (9), and further adsorbed by a roller (8) equipped with a magnet (45) and conveyed upward in the same direction as the conveying direction of the belt (9) for separation and recovery, which is characterized by this. The mixed powder (m) of the resin powder (c) and the resin powder with metal coating (b') having a low metal content rate can be slid down by varying the inclination angle of the belt (9) to the angle of repose of the mixed powder (m).

[0021] The sorting type device of the present invention is provided with a sorting type belt conveyor (62) having two rollers (8) that tilt and span a belt (9) to convey a mixed powder (m) of pulverized metal-coated powder (a), resin powder (c), and resin powder with metal coating (b, b'), with the belt (9) inclined beyond the angle of repose of the mixed powder (m). For the two rollers (8) spanning the belt (9) of the sorting type belt conveyor (62), a magnet (45) provided on the roller (8) at a higher position. A plate-shaped magnet (44) provided on the inner surface of the upper belt (9) of the sorting type belt conveyor (62) for adsorbing and conveying the metal-coated powder (a) and the resin powder with metal coating (b) upward. A vibration device (46) for vibrating the sorting type belt conveyor (62), and is characterized by this. The belt conveyor (62) can be configured such that its inclination angle is variable.

Effect of the Invention

[0022] In the dropping type method of the present invention described above, the resin powder with metal coating (b) is reliably separated from the resin powder (c) by adsorptive separation of the resin powder with metal coating (b) in the pulverized mixed powder (m) in several stages. Therefore, the metal-coated resin material (p) can be regenerated into a resin raw material with a low content of the metal-coated powder (a).

[0023] In the dropping type device of the present invention described above, the magnet (10a) provided on the roller (8) of the rough sorting belt conveyor (7) adsorbs the metal-coated powder (a) and the resin powder with metal coating (b) from the mixed powder (m). For the resin powder (c) not adsorbed by the rough sorting belt conveyor (7) and the resin powder with metal coating (b) having a low metal content, they are further separated by the magnet (10b) provided on the roller (8) of the precision sorting belt conveyor (13), so that the resin powder with metal coating (b) can be reliably separated from the resin powder (c).

[0024] In particular, by inclining the sorting belt conveyors (32, 33) to place the mixed powder (m) etc. placed on the belt (9) in a state exceeding the angle of repose, resin powders (b) and resin powders (b) with a metal coating that are not adsorbed by the magnet (10a) during conveyance can be actively separated and dropped first, enhancing the separation processing ability. Further, since the magnetic separation device (21) can adjust the adsorption rate, resin powders (b) with a metal coating having different metal contents can be accurately separated and recovered from the mixed metal coating powder (a) or resin powder (c).

[0025] In the suction type device of the present invention, by widening the distance (d) between the mixed powder (m) and the plate-shaped magnet (44) to reduce the adsorption rate of the resin powder (b) with a metal coating in the mixed powder (m) to the plate-shaped magnet (44), this resin powder (b) with a metal coating can be surely separated from the metal coating powder (a) or resin powder (c). Therefore, it can be regenerated into a metal raw material with a low content of the resin powder (b) with a metal coating.

[0026] When separating the metal coating powder (a) and the resin powder (b) with a metal coating from the mixed powder (m), by widening the distance (d) between the mixed powder (m) and the plate-shaped magnet (44) to reduce the adsorption rate of the resin powder (b) with a metal coating, only the metal coating powder (a) with a high metal content is separated and recovered, whereby this resin powder (b) with a metal coating can be surely separated from the resin powder (c). Therefore, it can be regenerated into a resin raw material with a low content of the resin powder (b) with a metal coating.

[0027] When separating the resin powder (c) and the resin powder (b) with a metal coating from the mixed powder (m), by narrowing the distance (d) between the mixed powder (m) and the plate-shaped magnet (44) to increase the adsorption rate of the resin powder (b) with a metal coating, the resin powder (c) with a low metal content can be separated and recovered.

[0028] The suction-type device of the present invention is configured to be able to adjust the distance between the conveyor belt conveyor (42) and the metal adsorption belt conveyor (43), reduce the adsorption rate of the resin powder with a metal film, and adsorb only the metal film powder from the mixed powder on the conveyor belt conveyor, so that the resin powder with a metal film can be reliably separated from the metal film powder or the resin powder.

[0029] In particular, by inclining the conveyor belt conveyor (42) and bringing the mixed powder (m) placed on the belt (9) into a state exceeding the angle of repose, the resin powder (c) and the resin powder with a metal film (b) that are not adsorbed by the plate magnet (44) during conveyance can be more actively separated by falling, and the separation processing ability can be enhanced.

[0030] In the sorting-type separation process of the present invention, the mixed powder (m) is placed on the inclined belt (9) of the sorting belt conveyor (62) in a vibrating state. The mixed powder (m) vibrating on the belt (9) causes the resin powder (c) with a small specific gravity and the resin powder with a metal film (b') with a low metal content to float on the vibrating belt (9). Since the floating resin powder (b) is not adsorbed by the plate magnet (44) and the inclined belt (9) exceeds the angle of repose, it slides down below the belt (9) as it is. On the other hand, the metal film powder (a) with a large specific gravity and the resin powder with a metal film (b) with a high metal content sink downward on the belt (9) due to the magnetic force of the plate magnet (44) and are transported to the upper magnet (45(8)) by the conveyance of the belt (9), thereby separating into a metal component and a resin component.

Brief Description of the Drawings

[0031]

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Figure 19

Modes for Carrying Out the Invention

[0032] The method for separating and recovering the metal and the resin material of the metal-coated resin material of the present invention and the metal and resin separation and recovery device thereof are technologies for separating and recovering the metal raw material and the resin raw material from resin-plated parts and reusing them as the metal raw material or the resin raw material, respectively.

[0033] Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic explanatory diagram of a separation and recovery device for a metal and a resin material of a metal-coated resin material of the present invention. FIG. 2 shows a state in which the metal-coated resin material is pulverized. (a) shows a state in which the metal-coated powder and the resin powder are adhered, (b) shows a state in which the metal-coated powder and the resin powder are separated, (c) shows a resin powder with a metal film, and (d) shows a resin powder with a metal film having a slightly adhered metal film. The method for separating and recovering the metal and resin material of the present invention, as shown in FIG. 1, roughly crushes the resin material p with a metal coating such as metal plating using a primary crusher 1. Next, the roughly crushed resin material p with a metal coating is conveyed by a belt conveyor 2 to a weighing hopper 3. After weighing a predetermined amount, it is conveyed to a secondary crusher 4 and finely crushed. In this secondary crusher 4, the particle size is crushed within the range of 0.6 mm to 2 mm so as to easily peel off the metal coating powder a from the resin material p with a metal coating. In the present invention, in order to make the particle size of the resin material p with a metal coating uniform, the crushed resin material p with a metal coating is passed through a mesh screen 5 as necessary and supplied from a cyclone 6 to a rough sorting belt conveyor 7.

[0034] The resin powder c and the resin powder b with a metal coating selected by the rough sorting belt conveyor 7 are further separated by a precision sorting belt conveyor 13. Thereafter, the separated resin powder c is processed by an injection molding machine or a pellet processing machine as necessary and reused as a molding raw material.

[0035] As shown in FIG. 2, this resin material p with a metal coating is crushed into a mixed powder m in which the metal coating powder a, the resin powder c, and the resin powder b with a metal coating are mixed. If the particle size of this mixed powder m is crushed to be smaller than 0.6 mm, it may adhere to the belt and the mechanism parts of the rough sorting belt conveyor 7 and the precision sorting belt conveyor 13 in the next process due to the influence of static electricity, which may take time for the treatment.

[0036] This resin material p with a metal coating is not limited to automotive parts such as door knobs and front grills described above. As waste materials of home appliances and OA equipment, it can also be processed for parts in which metal and resin are mixed, such as toner cartridges and drums for copiers, printers, etc., parts of notebook computers, and other parts such as compact discs and optical discs.

Example

[0037] <Metal dropping type separation and recovery device with the belt conveyor of Example 1 arranged horizontally> FIG. 3 is a schematic explanatory view showing a horizontal arrangement separation and recovery device of a metal dropping type with the belt conveyor of Example 1 arranged horizontally. The horizontal separation and recovery device of Example 1 is a sorting belt conveyor for separating resin and metal mainly for resin powder with a low metal content, and is composed of a rough sorting belt conveyor 7 and a precision sorting belt conveyor 13. The rough sorting belt conveyor 7 has a belt 9 horizontally spanned between two rollers 8, and one of the rollers 8 is provided with a magnet 10a. The magnet 10a may be either attached around the roller 8 or a bar-shaped magnet disposed inside the cylindrical roller 8. In this rough sorting belt conveyor 7, magnetic materials such as metal-coated powder a or resin powder b with a metal coating are conveyed to the lower part on the belt 9 by the magnetic force of the magnet 10a. Those other than magnetic materials such as resin powder c fall as they are at the roller 8 part. As a result, the metal-coated powder a and the resin powder c and the mixed powder m of the resin powder b with a metal coating are separated from the mixed powder m into the metal-coated powder a and the resin powder b with a metal coating and the resin powder c and the resin powder b with a metal coating by the magnetic force of the magnet 10a.

[0038] The rough sorting belt conveyor 7 is supplied with the mixed powder m from a cyclone 6 that collects the mixed powder m via a vibrating feeder 11 (see FIGS. 1 and 3). The mixed powder m is supplied onto the rough sorting belt conveyor 7 from the tip of the vibrating feeder 11. The vibrating feeder 11 uniformly disperses the pulverized mixed powder m onto the rough sorting belt conveyor 7 so that the metal-coated powder a is not adsorbed and conveyed in a state of being buried under the resin powder c and the resin powder b with a metal coating.

[0039] A separator 12 for sorting the selected metal-coated powder a and the resin powder b with a metal coating and the resin powder c and the resin powder b with a metal coating is disposed below the conveyance destination of the rough sorting belt conveyor 7, that is, on the side of the magnet 10a (roller 8). A precision sorting belt conveyor 13 is disposed below the lower stage of the separator 12. This precision sorting belt conveyor 13 is equipped with a magnet 10b (on the right side in FIG. 3) on one of the rollers 8 over which the belt 9 is spanned in order to further sort the resin powder b with a metal coating sorted by the rough sorting belt conveyor 7.

[0040] The magnetic forces of the magnet 10a of the rough sorting belt conveyor 7 and the magnet 10b of the precision sorting belt conveyor 13 are made different from each other so as to vary the adsorption rate of the resin powder b with a metal coating. When separating the resin powder b with a metal coating having a low content of the metal-coated powder a, the precision sorting belt conveyor 13 uses a magnet 10b that is more powerful than the magnetic force of the magnet 10a of the rough sorting belt conveyor 7 to actively adsorb the resin powder b with a metal coating and separate it from the resin powder c. Regarding these magnets 10a and 10b, although the present invention describes permanent magnets, it is needless to say that they are not limited to permanent magnets and can be changed to electromagnets.

[0041] Next, in the precision sorting belt conveyor 13, the resin powder c is directly recovered into the resin fraction recovery tank 16. On the other hand, the resin powder b with a metal coating is adsorbed by the magnet 10b with a strong magnetic force and conveyed to the mixture recovery tank 14. Therefore, only the resin raw material with a low metal content is recovered in the resin fraction recovery tank 16. Rotary scrapers 15 are arranged on the belts 9 of the rough sorting belt conveyor 7 and the precision sorting belt conveyor 13 to scrape off the metal-coated powder a and the resin powder b with a metal coating adhering thereto.

[0042] Examples of test results when recovering the resin fraction from the metal-coated resin material p by the rough sorting belt conveyor 7 and the precision sorting belt conveyor 13 of the present invention are shown in Table 1 and Table 2. Table 1 shows the average film thickness and the recovered amount of the resin fraction for parts whose metal film is made of copper, nickel, and chromium. Table 2 shows the average film thickness and the recovered amount of the resin fraction for parts whose metal film is made of nickel and chromium.

[0043] [Table 1]

[0044] [Table 2]

[0045] <Horizontal arrangement separation and recovery device of metal dropping type of Example 1 (configuration equipped with precision sorting belt conveyor and magnetic separation device)> FIG. 4 shows a horizontal arrangement separation and recovery device of metal dropping type of Example 1, and is a schematic explanatory diagram showing an embodiment of a horizontal arrangement separation and recovery device equipped with a precision sorting belt conveyor and a magnetic separation device. The horizontal arrangement separation and recovery device of the present invention is provided with a magnetic separation device 21 capable of further adjusting the adsorption rate of a magnet below the above-described precision sorting belt conveyor 13. This magnetic separation device 21 includes a conveyor belt conveyor 24 with a belt 23 stretched between rollers 22 for transporting the metal-coated powder a and the resin powder b with a metal coating sorted by the precision sorting belt conveyor 13, and a metal adsorption belt conveyor 25 disposed above the conveyor belt conveyor 24. This metal adsorption belt conveyor 25 has a belt 23 stretched between rollers 22, and an auxiliary magnet 26 is further provided adjacent to the roller 22 (magnet 28) on the inner surface of the lower belt 23. The resin powder c sorted by the precision sorting belt conveyor 13 is directly recovered into the first resin fraction recovery tank 27.

[0046] This magnetic separation device 21 surely separates the resin powder b with a metal coating from the metal-coated powder a or the resin powder c by varying the distance between the metal-coated powder a, the resin powder b with a metal coating, etc. and the auxiliary magnet 26 and adjusting the adsorption rate of the resin powder b with a metal coating. For example, the adsorption rate of the auxiliary magnet 26 is weakened to reduce the adsorption rate of the resin powder b with a metal coating and only the metal-coated powder a is adsorbed. This metal-coated powder a is transported to the upper surface of the metal adsorption belt conveyor 25 using one roller 22 (the right side in FIG. 4) of the metal adsorption belt conveyor 25 with a magnet 28 and recovered into the metal fraction recovery tank 30. On the other hand, the resin powder b' with a metal coating and the resin powder c having a low metal content that were not adsorbed are directly transported by the conveyor belt conveyor 24 and recovered into the second resin fraction recovery tank 29.

[0047] <Horizontal arrangement separation and recovery device of metal dropping type of Example 1 (other configuration equipped with precision sorting belt conveyor and magnetic separation device)> FIG. 5 is a schematic explanatory view showing a horizontally arranged separation and recovery apparatus of the metal dropping type according to the first embodiment, and further showing another embodiment. The embodiment shown in FIG. 5 is arranged in a direction facing the conveying direction of the rough sorting belt conveyor 7, different from the conveying direction of the precision sorting belt conveyor 13 of the embodiment shown in FIG. 4, and two mixture recovery tanks 14 are provided. In this embodiment, first, in the rough sorting belt conveyor 7, the mixture of the metal-coated powder a and the resin powder b with a metal coating and the resin powder c are separated and recovered. Next, also in the precision sorting belt conveyor 13, the mixture of the metal-coated powder a and the resin powder b with a metal coating and the resin powder c are separated and recovered. For these mixtures, a magnetic separation device 21 capable of adjusting the adsorption rate of the magnet is used to separate and recover the metal-coated powder a and the resin powder b with a large metal content and the resin powder b with a small metal content.

Example

[0048] <Inclined Arrangement Separation and Recovery Apparatus of Metal Dropping Type with Inclined Belt of Example 2> FIG. 6 is a schematic explanatory view showing an inclined arrangement separation and recovery apparatus of the metal dropping type with an inclined belt according to the second embodiment. The same reference numerals are used for the same members as in the first embodiment, and the description thereof is omitted. In the horizontal arrangement separation and recovery device of the metal dropping type of Example 1, all the sorting belt conveyors 7 and 13 are arranged horizontally. The sorting belt conveyor does not necessarily have to be arranged horizontally. In the inclined arrangement separation and recovery device 31 of Example 2, the sorting belt conveyors 32 and 33 are arranged in an inclined manner. By arranging the sorting belt conveyors 31 and 33 in this inclined manner, the resin powder c being conveyed is not adsorbed by the magnet 10a (8), so it is easier to drop as it is. For example, the sorting belt conveyors 32 and 33 with the crushed material placed on them are arranged at an inclination angle close to the angle of repose. By setting this angle, the resin powder c on the deposited surface side is more likely to roll down during conveyance. That is, by inclining the sorting belt conveyors 32 and 33 and bringing the mixed powder m placed on the belt 9 into a state exceeding the angle of repose, the resin powder c and the resin powder b with a metal coating that are not adsorbed by the magnet 10a during conveyance are actively separated by dropping. By dropping such resin powder c in advance so as to collapse, it can be separated quickly.

[0049] The inclined arrangement type sorting belt conveyor of Example 2 is mainly suitable for the rough sorting belt conveyor 32. This is because there is a variation in the particle size of the crushed mixed powder m in the rough sorting belt conveyor 32. It becomes easier to drop and sort the resin powder c with a relatively large particle size. The inclined arrangement type rough sorting belt conveyor 32 of this Example 2 is substantially the same as the configuration of Example 1 except for the inclined arrangement. A belt 9 is inclined and stretched between two rollers 8, and one of these rollers 8 is provided with a magnet 10a. In this rough sorting belt conveyor 32, the mixed powder m of the metal-coated powder a, the resin powder c, and the resin powder b with a metal coating is separated by the magnetic force of the magnet 10a into the metal-coated powder a and the resin powder b with a metal coating, and the resin powder c and the resin powder b with a metal coating. At this time, the resin powder c and the resin powder b with a metal coating having a relatively large particle size are dropped. In the illustrated example, the precision sorting belt conveyor 33 is arranged in an inclined manner. Conversely, the precision sorting belt conveyor 33 can also be arranged horizontally.

[0050] <Modification Example 1 of the Inclined Arrangement Separation and Recovery Device of the Metal Dropping Type of Example 2> FIG. 7 is a schematic explanatory diagram showing Modification 1 of the inclined arrangement separation and recovery device of Example 2, where (a) shows the case when arranged at a steep slope and (b) shows the case when arranged at a gentle slope. In the inclined arrangement separation and recovery device 31 of Example 2, the inclination angles of the rough sorting belt conveyor 32 and the precision sorting belt conveyor 33 are both configured to be variably adjustable. The inclination angles of the rough sorting belt conveyor 32 and the precision sorting belt conveyor 33 of Example 2 are not limited to the angle α1 shown in FIG. 6. The angle of repose of the pulverized material on the belt 9 varies depending on the properties of the pulverized material, for example, the size of the particle diameter, the metal content of the resin-plated parts, or the difference in the type of resin. Therefore, as shown in FIG. 7(a), the sorting belt conveyors 32 and 33 can be arranged at a steeper slope (α2) than the angle (α1) shown in FIG. 6. Conversely, as shown in FIG. 7(b), the sorting belt conveyors 32 and 33 can be arranged at a gentler slope (α3) than the angle (α1) shown in FIG. 6. Of course, the angle of this slope is not limited to the illustrated example. Also, in the illustrated example, the inclination angles of the rough sorting belt conveyor 32 and the precision sorting belt conveyor 33 are the same, but it is not necessary to make both the same angle. For example, it is also possible to set different slopes such that the rough sorting belt conveyor 32 is set at a gentle slope and the precision sorting belt conveyor 33 is set at a steep slope. Or it is also possible to make the reverse setting.

[0051] Select according to the properties of the mixed powder m of the metal-coated powder a, the resin powder c, and the resin powder b with a metal coating by combining this inclination angle (α) and the conveying speed of the belt 9. For example, when the mixed powder m has a relatively large particle diameter, the inclination angle (α) is a steep slope and the conveying speed of the belt 9 is increased. Conversely, when the mixed powder m has a relatively small particle diameter, the inclination angle (α) is a gentle slope and the conveying speed of the belt 9 is decreased.

[0052] <Modification 2 of the metal-drop type inclined arrangement separation and recovery device of Example 2> FIG. 8 is a schematic explanatory diagram showing Modification 2 of the inclined arrangement separation and recovery device of Example 2. The sorting belt conveyors 32 and 33 of Example 2 are equipped with a vibration device 34. The mixed powder m being conveyed is vibrated using the vibration device 34 to lift the relatively large powder (resin powder b) and sink the small powders (resin powder b and resin powder b with a metal coating). This lifted large powder (resin powder b) is more likely to roll and fall.

[0053] <Modified Example 3 of the Inclined Arrangement Separation and Recovery Device of the Metal Drop Type of Example 2> FIG. 9 is a schematic explanatory diagram showing Modified Example 3 of the inclined arrangement separation and recovery device of Example 2. The sorting belt conveyors 32 and 33 of Example 2 are equipped with an air injection device 35. The air injection device 35 blows off the relatively large powder (resin powder b) that has lifted during the conveyance of the mixed powder m and sinks the small powders (resin powder b and resin powder b with a metal coating). In the illustrated example, the configuration arranged on each of the sorting belt conveyors 32 and 33 is described, but it is not necessarily required to be configured on both. It may be arranged on either one of the sorting belt conveyors 32 and 33. For example, it may be provided only on the rough sorting belt conveyor 32.

Example

[0054] <Metal Adsorption Type Separation and Recovery Device with the Belt Conveyor Horizontally Arranged in Example 3> FIG. 10 is a schematic explanatory diagram of a horizontally arranged metal adsorption type separation and recovery device with the belt conveyor horizontally arranged. FIG. 11 is a schematic explanatory diagram showing the horizontally arranged metal adsorption type separation and recovery device of Example 3. For the same members as in Examples 1 and 2, the same reference numerals are used and the description thereof is omitted. The horizontally arranged metal adsorption type separation and recovery device 41 of Example 3 is a separation device of a type that adsorbs metal upward and has a belt conveyor horizontally arranged. This horizontally arranged metal adsorption type separation and recovery device 41 is composed of a conveyor belt conveyor 42 that conveys the mixed powder m and a metal adsorption belt conveyor 43 arranged above it. A plate-shaped magnet 44 is arranged on the lower and inner surfaces of the belt 9 of the upper metal adsorption belt conveyor 43. Further, a magnet 45 (on the left side in FIG. 11) is provided on one of the rollers 8.

[0055] In the belt conveyor 43 for metal adsorption, the metal-coated powder a is adsorbed and lifted by the magnetic force of the plate magnet 44 from the mixed powder m of the metal-coated powder a, the resin powder c, and the resin powder b with a metal coating, and separated from the resin powder c and the resin powder b with a metal coating.

[0056] The conveying directions of the belt 9 of the conveying belt conveyor 42 and the belt 9 of the belt conveyor 43 for metal adsorption are both set in the same direction (in Fig. 11, the upper surface side of the belt 9 is conveyed from left to right). However, the lower surface side of the belt 9 of the belt conveyor 43 for metal adsorption is conveyed from right to left. Therefore, the two belts 9 face each other, and the metal-coated powder a and the resin powder b with a metal coating adsorbed on the belt 9 by the magnetic force of the plate magnet 44 on the belt 9 of the belt conveyor 43 for metal adsorption are conveyed to the upper surface of the belt conveyor 43 for metal adsorption by the magnet 45 provided on one of the rollers 8.

[0057] The mixed powder m of the metal-coated powder a, the resin powder c, and the resin powder b with a metal coating is supplied to the belt conveyor 43 for metal adsorption from the cyclone 6 that collects the mixed powder m through the vibrating feeder 11. The mixed powder m is supplied onto the conveying belt conveyor 42 from the tip of the vibrating feeder 11. The vibrating feeder 11 uniformly disperses the pulverized mixed powder m onto the conveying belt conveyor 42 so that the metal-coated powder a is buried under the resin powder c and the resin powder b with a metal coating, avoiding being conveyed without being adsorbed. The conveying belt conveyor 42 has a belt 9 stretched between the rollers 8. Regarding this plate magnet 44, in the present invention, a permanent magnet is described, but it is of course not limited to this permanent magnet and can be changed to an electromagnet.

[0058] Above this conveyor belt conveyor 42, a metal adsorption belt conveyor 43 is arranged with plate magnets 44 provided on the inner surface of the lower belt 9 stretched between rollers 8 to adsorb the metal-coated powder a and the resin powder b with a metal coating. The distance between this metal adsorption belt conveyor 43 and the conveyor belt conveyor 42, that is, the gap width d, can be adjusted in length. Thereby, the magnetic force of the plate magnet 44 with respect to the resin powder b with a metal coating can be adjusted, and its adsorption rate can be made variable. For example, as shown in FIG. 11, the conveyor belt conveyor 42 is configured to move up and down with respect to the metal adsorption belt conveyor 43. Of course, it is also possible to configure it to move the metal adsorption belt conveyor 43 up and down.

[0059] This horizontally arranged metal adsorption type separation and recovery device 41 of Example 3 adsorbs the metal-coated powder a in the mixed powder m conveyed on the conveyor belt conveyor 42 from the vibration feeder 11 to the plate magnet 44 and separates it from the resin powder c. The resin powder c remaining on the conveyor belt conveyor 42 is directly conveyed to the resin separation recovery tank 49. On the other hand, the metal-coated powder a adsorbed to the plate magnet 44 is conveyed to the upper surface of the belt 9 of the metal adsorption belt conveyor 43 and then conveyed to the metal separation recovery tank 48. Therefore, one roller 8 (the left side in FIG. 11) of the metal adsorption belt conveyor 43 uses a magnet 45. Thereby, the metal-coated powder a and the resin powder b with a metal coating can be conveyed to the upper surface of the metal adsorption belt conveyor 43 and recovered in the recovery tank 48 at a desired position.

[0060] The conveyor belt conveyor 42 is provided with a vibration device 46 that vibrates the belt 9 stretched between the rollers 8. The mixed powder m on this belt 9 is vibrated to make it easier to separate the metal-coated powder a from the resin powder c and the resin powder b with a metal coating. A partition frame 47 is attached to the belt 9 of this conveyor belt conveyor 42. This partition frame 47 prevents the pulverized material mixed before the separation process of the mixed powder m from falling into the recovery tank 48 when the belt 9 is vibrated by the vibration device 46.

[0061] In the horizontally arranged metal adsorption type separation and recovery device 41 of Example 3, as shown in FIG. 11, the distance d between the conveyor belt conveyor 42 and the metal adsorption belt conveyor 43 is widened to reduce the adsorption rate of the resin powder b with a metal film in the mixed powder m to the magnet 8. As a result, as shown in FIG. 11, it is possible to surely separate from the resin powder c according to the adhesion content of the metal film powder in the resin powder b with a metal film. Therefore, it can be regenerated into a metal raw material or a resin raw material with a low content of the resin powder with a metal film.

[0062] Conversely, the distance d between the conveyor belt conveyor 42 and the metal adsorption belt conveyor 43 is narrowed to increase the adsorption rate of the resin powder b with a metal film in the mixed powder m to the magnet 8. Thereby, the resin powder b with a metal film can be adsorbed and surely separated from the resin powder c. Therefore, it can be regenerated into a resin raw material with a low content of the resin powder b with a metal film.

[0063] <Modification of the Horizontally Arranged Metal Adsorption Type Separation and Recovery Device of Example 3> FIG. 12 is a schematic explanatory view showing another embodiment of the horizontally arranged metal adsorption type separation and recovery device of Example 3. The horizontally arranged metal adsorption type separation and recovery device 41 of Example 3 can be regenerated into high-purity metal raw materials and resin raw materials by being used in combination with separation devices having other configurations such as the dropping type separation and recovery devices 7 and 13 of Example 1. In the horizontally arranged metal adsorption type separation and recovery device 41 of Example 3, it is not necessary to use only the combination of the above-described conveyor belt conveyor 42 and the metal adsorption belt conveyor 43. In the device shown in FIG. 12, first, the pulverized mixed powder m is simply separated into the metal film powder a and the resin powder b with a metal film and the resin powder c by a separation and recovery device 7 or 13 having a magnet 10a formed in the roller 9 portion described in Example 1, and only the resin powder c is recovered in the respective recovery tanks 48 and 49.

[0064] Next, with respect to the mixed powder m of the metal-coated powder a and the resin powder b with a metal coating, the metal-coated powder a, the resin powder b with a metal coating, and the resin powder c are separated and recovered with high precision using the horizontally arranged metal adsorption type separation and recovery device 41 of Example 3. At this time, the interval d between the conveying belt conveyor 42 and the metal adsorption belt conveyor 43 is adjusted according to the type of metal or resin and the particle size of the mixed powder m to reduce the adsorption rate of the resin powder b with a metal coating in the mixed powder m to the magnet 8.

[0065] Furthermore, the horizontally arranged metal adsorption type separation and recovery device 41 of Example 3 is not limited to a combination of one set of a conveying belt conveyor 42 and a metal adsorption belt conveyor 43. When separating precisely, as shown in FIGS. 4 and 5 of Example 1, two sets of a conveying belt conveyor 42 and a metal adsorption belt conveyor 43 are arranged to separate the resin powder b with a metal coating into the resin powder c and the metal powder a. Furthermore, the conveying direction of each belt conveyor 42 can be changed as appropriate.

[0066] Although not shown, for the horizontally arranged metal adsorption type separation and recovery device 41 of Example 3, one is arranged such that the total length of the conveying direction of the metal adsorption belt conveyor 43 is longer than the total length of the conveying direction of the conveying belt conveyor 42. With such an arrangement, the metal-coated powder a and the resin powder b with a metal coating adsorbed on the lower surface of the metal adsorption belt conveyor 43 can be recovered at one end of the metal adsorption belt conveyor 43. At this time, a scraper (not shown) is provided on the metal adsorption belt conveyor 43 to scrape them off.

[0067] Also, although not shown, for the horizontally arranged metal adsorption type separation and recovery device 41 of Example 3, in order to recover the adsorbed metal-coated powder a and the resin powder b with a metal coating, the metal adsorption belt conveyor 43 and the conveying belt conveyor 42 are arranged shifted in the conveying direction, so that they can be recovered at one end of the metal adsorption belt conveyor 43.

[0068] When simply aiming to increase the recovery rate of the metal material, the distance d between the conveyor belt conveyor 42 and the metal adsorption belt conveyor 43 is shortened. The mixture of the recovered metal-coated powder a and the resin powder b with a metal coating can be regenerated into a metal raw material or a resin raw material with a low content of the resin powder b with a metal coating by performing a separation and recovery process again.

[0069] Although not shown, the horizontally arranged metal adsorption type separation and recovery device 41 of Example 3 does not need to be used only with the combination of the above-described set of the conveyor belt conveyor 42 and the metal adsorption belt conveyor 43, and it is preferably used in combination with the separation and recovery device of Example 1 or 2. First, the pulverized mixed powder m is simply separated into the metal-coated powder a, the resin powder b with a metal coating, and the resin powder c by another magnetic separation device having a magnet in the roller portion, for example, and only the resin powder c is recovered. Next, for the mixed powder m of the metal-coated powder a and the resin powder b with a metal coating, a highly accurate separation and recovery of the metal-coated powder a, the resin powder b with a metal coating, and the resin powder c is performed using the horizontally arranged metal adsorption type separation and recovery device 41 of Example 3. At this time, the distance d between the conveyor belt conveyor 42 and the metal adsorption belt conveyor 43 is adjusted according to the type of metal and resin and the particle size of the mixed powder m, so that the adsorption rate of the resin powder b with a metal coating in the mixed powder m to the magnet can be reduced.

Example

[0070] <Metal adsorption type separation and recovery device with the conveyor belt of Example 4 arranged obliquely> FIG. 13 is a schematic explanatory view showing a metal adsorption type inclined arrangement metal adsorption type separation and recovery device in which the conveyor belt of Example 4 is arranged obliquely. The same members as those in Examples 1, 2, and 3 are denoted by the same reference numerals, and the description thereof is omitted. In the horizontally arranged metal adsorption type separation and recovery device 41 of Example 3, all the sorting belt conveyors 42 and 43 are horizontally arranged. The sorting belt conveyors do not necessarily have to be horizontally arranged. In the inclined arrangement type separation and recovery device 51 of Example 4, the conveying belt conveyor 52 and the metal adsorption belt conveyor 53 are arranged in an inclined manner. By arranging the conveying belt conveyor 52 and the metal adsorption belt conveyor 53 in an inclined manner like this, the resin powder c being conveyed is not adsorbed by the magnet and thus falls downward to the lower side as it is. For example, the sorting belt conveyor 52 loaded with the crushed material is arranged at an inclination angle close to the angle of repose. By setting this angle, the resin powder c on the surface side that has accumulated is likely to roll down during conveyance. By dropping the resin powder c in advance so that it collapses, rapid separation can be achieved.

[0071] The inclined arrangement type sorting belt conveyor 51 of Example 4 is mainly suitable for the rough sorting belt conveyor. This is because in the rough sorting belt conveyor, the particle sizes of the crushed materials vary. It is easier to drop and sort the resin powder c with a relatively large particle size. The inclined arrangement type rough sorting belt conveyor 52 of this Example 4 is substantially the same as the configuration of Example 3 except that it is arranged in an inclined manner. The rough sorting belt conveyor 52 has a belt 9 stretched between rollers 8, and one of these rollers 8 is provided with a magnet 45. In this rough sorting belt conveyor 7, the mixed powder m of the metal-coated powder a, the resin powder c, and the resin powder b with a metal coating is separated by the magnetic force of the magnet 45 into the metal-coated powder a and the resin powder b with a metal coating, and the resin powder c and the resin powder b with a metal coating. At this time, the resin powder c and the resin powder b with a metal coating having a relatively large particle size are dropped.

[0072] <Modification Example 1 of the Inclined Arrangement Type Metal Drop Type Separation and Recovery Device of Example 4> FIG. 14 is a schematic explanatory view showing Modification Example 1 of the inclined arrangement type separation and recovery device of Example 4. Modification Example 1 of the conveyor belt 52 in Example 4 is equipped with an air injection device 35 that blows away relatively large powders (resin powders c) that have lifted during the conveyance of the mixed powder m. The air injection device 35 of this Modification Example 1 can blow away large powders (resin powders c) and sink small powders (resin powders c and resin powders b with a metal coating). In the illustrated example, a configuration arranged on the conveyor belt 52 for conveyance is described. Note that since relatively large pulverized materials that have already fallen and separated from the resin pulverized materials conveyed by the adsorption belt conveyor 53 arranged above the conveyor belt 52 for conveyance, the effect of the forced falling process by the air injection device 35 is small, and it is not necessarily required to be configured.

[0073] <Modification Example 1 of the Metal Adsorption Type Inclined Arrangement Separation and Recovery Device in Example 4> FIG. 15 is a schematic explanatory diagram showing Modification Example 2 of the inclined arrangement separation and recovery device in Example 4, where (a) is when arranged at a steep gradient and (b) is when arranged at a gentle gradient. The inclination angles of the sorting belt conveyor 52 and the precision sorting belt conveyor 53 in Example 4 can be configured to be adjustable respectively. The inclination angles of the rough sorting belt conveyor 52 and the precision sorting belt conveyor 53 in Example 2 are not limited to the angles (β1) shown in FIG. 13. Depending on the properties of the pulverized material, the angle of repose on the belt 9 is different. Therefore, as shown in FIG. 15(a), the sorting belt conveyors 52 and 53 can be arranged at a steeper gradient (β2) than the angle (β1) shown in FIG. 13. Conversely, as shown in FIG. 15(b), the sorting belt conveyors 52 and 53 can be arranged at a gentler gradient (β3) than the angle (β1) shown in FIG. 13. Of course, the angle of this gradient is not limited to the illustrated example. Also, in the illustrated example, the inclination angles of the rough sorting belt conveyor 32 and the precision sorting belt conveyor 53 are the same, but it is not necessary to make both at the same angle. For example, it is also possible to set different gradients such that the rough sorting belt conveyor 52 is set at a gentle gradient and the precision sorting belt conveyor 53 is set at a steep gradient.

[0074] The combination of this inclination angle (β) and the conveying speed of the belt 9 is selected according to the properties of the mixed powder m of the metal-coated powder a, the resin powder c, and the resin powder b with a metal coating. For example, when the mixed powder m has a relatively large particle size, the inclination angle (α) is a steep gradient and the conveying speed of the belt 9 is increased. Conversely, when the mixed powder m has a relatively small particle size, the inclination angle (α) is a gentle gradient and the conveying speed of the belt 9 is decreased.

[0075] Note that the present invention is not limited to the above-described embodiments of the invention. As long as it is a method or processing apparatus for reducing the adsorption rate of the resin powder b with a metal coating in the pulverized mixed powder m and reliably separating the resin powder b with a metal coating from the metal-coated powder a or the resin powder c to regenerate high-purity metal raw materials and resin raw materials, it is not limited to the configuration such as the illustrated steps, processing equipment, or processing apparatus, and it goes without saying that various changes can be made without departing from the gist of the present invention.

Example

[0076] <The sorting type separation and recovery device with the belt conveyor of Example 5 arranged inclined> FIG. 16 is a schematic explanatory view showing a sorting type separation and recovery device that separates the metal component and the resin component while vibrating with the belt conveyor of Example 5 arranged inclined. Regarding the same members as in Examples 1, 2, 3, and 4, the same reference numerals are used and the description thereof is omitted. The sorting type separation and recovery device 61 of Example 5 is composed of a sorting type belt conveyor 62 in which a belt 9 is inclined and stretched between two rollers 8. One of the rollers 8 is provided with a magnet 45 (on the right side in FIG. 16). Further, a plate-shaped magnet 44 is arranged on the upper surface and the inner side of the belt 9. A vibration device 46 for vibrating the sorting type belt conveyor 62 is provided. The vibration feeder 11 is arranged such that the supply position (falling position) of the mixed powder m is near the magnet 45 (8) at the high position of the belt 9. The belt 9 is operated to convey from the roller 8 at the low position to the roller 45 (8) at the high position.

[0077] The vibrating-sorting belt conveyor 62 is loaded with the mixed powder m in a vibrating state from the vibrating feeder 11 onto the belt 9. The mixed powder m vibrating on the inclined belt 9, the resin powder c with a small specific gravity floats on the vibrating belt 9. Since the lifted resin powder b is not adsorbed by the plate magnet 44 and the inclined belt 9 exceeds the angle of repose, it slides down below the belt 9 as it is.

[0078] On the other hand, the metal-coated powder a with a large specific gravity and the resin powder b with a metal coating sink downward on the belt 9 due to the magnetic force of the plate magnet 44 and are conveyed by the belt 9 to the upper magnet 45(8). Thereby, it is separated into a metal component and a resin component.

[0079] The inclination angle of the vibrating-sorting belt conveyor 62 is configured to be variably adjustable. The vibrating-sorting belt conveyor 62 is set to an inclination angle close to the angle of repose according to the properties of the pulverized material (mixed powder m). Similarly, the conveying speed is also adjusted according to the properties of the pulverized material (mixed powder m).

[0080] <Modification Example 1 of the Vibrating-Sorting Separation and Recovery Device of Example 5> FIG. 17 is a schematic explanatory view showing Modification Example 1 of the inclined separation and recovery device of Example 5. In order to perform the separation process when the proportion of the resin powder b with a metal coating having a high metal content is large, two separation belt conveyors are arranged. The vibrating-sorting separation and recovery device of Example 5 can also be used in combination. As described above, if the mixed powder m is a mixture of the metal-coated powder a and the resin powder c, the separation operation can be completed in one treatment. In reality, as shown in FIG. 2, in addition to the metal-coated powder a and the resin powder c, there are included the resin powder b with a metal coating having a high metal content and the resin powder b' with a metal coating having a low metal content.

[0081] The separation and recovery device 61 of Modification Example 1 performs separation processing in two stages using two sorting belt conveyors 62. The resin components (resin powder c) sorted as resin components by the upper-stage separation and recovery device 61 contain resin powders b and b' with metal coatings. In this lower-stage separation and recovery device 61, the resin powder b' with a high metal content is separated from the resin powders b and b' with metal coatings so as to be taken out. For this purpose, the magnet 45(8) of the lower-stage sorting belt conveyor 62 is arranged at a position below the upper-stage sorting belt conveyor 62. Also, the magnetic force of the plate-shaped magnet 44a of the lower-stage sorting belt conveyor 62 is made stronger than the magnetic force of the plate-shaped magnet 44b of the upper stage. By recovering in this way, precise separation can be achieved. Modification Example 1 is suitable for the mixed powder m when the content ratio of the resin powder b with a metal coating having a high metal content is higher than that of the resin powder b' with a metal coating having a low metal content.

[0082] <Modification Example 2 of the Sorting-Type Separation and Recovery Device of Example 5> FIG. 18 is a schematic explanatory diagram showing Modification Example 2 of the inclined arrangement separation and recovery device of Example 5, in which two separation and recovery devices are arranged to separate the resin powder b with a metal coating having a low metal content. Modification Example 2 also performs separation processing in two stages using two sorting belt conveyors 62, but is suitable for the mixed powder m when the content ratio of the resin powder b with a metal coating having a high metal content is lower than that of the resin powder b' with a metal coating having a low metal content. Modification Example 2 contains the resin powders b and b' with metal coatings sorted into resin components by the upper-stage sorting belt conveyor 62. In the lower-stage sorting belt conveyor 62, the resin powder b with a high metal content is separated from the resin powders b and b' with metal coatings so as to be taken out. For this purpose, the plate-shaped magnet 44 of the lower-stage sorting belt conveyor 62 is arranged at a position below the magnet 45(8) of the upper-stage sorting belt conveyor 62. Also, the magnetic force of the plate-shaped magnet 44a of the lower-stage sorting belt conveyor 62 is made stronger than the magnetic force of the plate-shaped magnet 44b of the upper stage.

Industrial Applicability

[0083] The method for separating and recovering the metal and the resin material of the metal-coated resin material of the present invention and the separating and recovering apparatus thereof can be used when separating and recovering the metal raw material and the resin raw material from the resin-plated parts and reusing them as the metal raw material or the resin raw material, respectively.

Explanation of symbols

[0084] 7 Coarse sorting belt conveyor 8 Roller 9 Belt 10a Magnet 12 Separator 13 Fine sorting belt conveyor 34 Vibration device 35 Injection device 42 Conveyor belt for transportation 43 Belt conveyor for metal adsorption 44 Plate-shaped magnet 62 Belt conveyor for sorting d Distance between the conveyor belt for transportation and the belt conveyor for metal adsorption p Metal-coated resin material a Metal-coated powder b Resin powder with metal coating c Resin powder m Mixed powder

Claims

1. The metal-coated resin material (p) having the metal coating attached thereto is pulverized to produce a mixed powder (m) of the metal-coated powder (a), the resin powder (c) and the resin powder with the metal coating (b, b'); The mixed powder (m) is placed on an inclined belt (9) and conveyed while vibrating it; First, the resin powder (c) and the metal-coated resin powder (b') having a low metal content are slid downward, which is the opposite direction to the conveying direction, on the belt (9) which is inclined beyond the angle of repose, The method for separating and recovering the metal and resin material of a metal-coated resin material is characterized in that the metal-coated powder (a) and the metal-coated resin powder (b) with a high metal content are attracted to a plate-shaped magnet (44) arranged on the inner surface of the belt (9), and then transported upward in the same direction as the transport direction of the belt (9) while being further attracted to a roller (8) equipped with a magnet (45), thereby separating and recovering the metal and resin material.

2. The method for separating and recovering metal and resin material from metal-coated resin material as described in claim 1, characterized in that a mixed powder (m) of resin powder (c) and metal-coated resin powder (b') having a low metal content is slid down by changing the inclination angle of the belt (9) to the angle of repose of the mixed powder (m).

3. a distribution type belt conveyor (62) including two rollers (8) for conveying a mixed powder (m) of the pulverized metal-coated powder (a), the resin powder (c), and the metal-coated resin powder (b, b'), the belt (9) being stretched across the two rollers (8) at an incline exceeding the angle of repose of the mixed powder (m); A magnet (45) is provided on a roller (8) located at a higher position of two rollers (8) around which a belt (9) of the sorting type belt conveyor (62) is stretched; a plate-shaped magnet (44) provided on the inner surface of the upper belt (9) of the sorting-type belt conveyor (62) for attracting the metal-coated powder (a) and the metal-coated resin powder (b) and transporting them upward; a vibration device (46) for vibrating the sorting belt conveyor (62).

4. 4. The apparatus for separating and recovering metal and resin material of a metal-coated resin material according to claim 3, wherein the inclination angle of the belt conveyor (62) is freely variable.

Images