Non-ferrous metal recovery line

Abstract

To provide a non-ferrous metal recovery line capable of separating waste smaller than a predetermined size and recovering non-ferrous metal from waste containing a mixture of metal including ferrous and non-ferrous materials and non-metal.SOLUTION: A non-ferrous metal recovery line for waste containing a mixture of metal including ferrous and non-ferrous materials and non-metal comprises: a first separation step 20 of magnetically separating ferrous material from the waste that has passed through a first-size mesh; a milling step 30 of milling the waste; a light-weight material removal step 40 of removing light-weight material from the waste; a second separation step 50 of classifying the waste into waste that has passed through a second-size mesh D and waste that has not passed through the second-size mesh; and a third separation step 60 of separating the waste that has not passed through the second-size mesh D into multiple specific gravity ranges using a multi-stage water tank, wherein the multi-stage water tank is provided with vibrations of different frequencies for each water tank.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a non-ferrous metal recovery line. [Background technology]

[0002] 2. Description of the Related Art Conventionally, there has been known a non-ferrous metal recovery line for recovering non-ferrous metals from waste in which metals, including ferrous and non-ferrous metals, and non-metals are mixed. Conventional non-ferrous metal recovery lines recover large-sized non-ferrous metals after crushing industrial waste from office equipment such as copy machines and vending machines. However, in conventional non-ferrous metal recovery lines, it is difficult to separate waste smaller than a certain size into each type of non-ferrous metal. For example, in order to separate waste smaller than a certain size into each type of non-ferrous metal, the separation must be done by hand. When comparing the profit from selling non-ferrous metals after manual separation, the labor costs exceed the profit. In addition, in order to dispose of waste of a size that is difficult to separate, incineration costs are required. For the above reasons, there was a need for a technology that can separate waste smaller than a certain size into each type of non-ferrous metal. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2022-72351 Summary of the Invention [Problem to be solved by the invention]

[0004] The present invention aims to provide a non-ferrous metal recovery line capable of separating small waste materials and recovering non-ferrous metals from waste materials containing a mixture of metals and non-metals, including iron and non-ferrous metals. [Means for solving the problem]

[0005] The non-ferrous metal recovery line of the present invention is a non-ferrous metal recovery line from waste containing a mixture of metals and non-metals, including iron and non-ferrous metals, and comprises a first sorting process for magnetically separating the iron contained in the waste that has passed through a mesh of a first size, a grinding process for grinding the waste from which the iron has been separated, a second sorting process for classifying the ground waste into waste that has passed through a mesh of a second size and waste that does not pass through the mesh of the second size, and a third sorting process for sorting the waste that does not pass through the mesh of the second size in the second sorting process into a plurality of specific gravity ranges using a plurality of water tanks, each of which is subjected to vibrations of a different frequency.

[0006] It is preferable that the first size mesh is greater than 8 mm and not greater than 25 mm, the second size mesh is greater than 2 mm and not greater than 8 mm, the third sorting process has three stages of tanks, first to third tanks, and waste that does not pass through the second size mesh is sorted into four specific gravity ranges.

[0007] The second sorting process includes a step of vibrating and separating the waste that has passed through a mesh of the second size into waste that has passed through a mesh of a third size and waste that has not passed through a mesh of the third size, and it is preferable that the mesh of the third size is 2 mm or less.

[0008] The second sorting step preferably includes a step of using two stages of water tanks, a fourth and a fifth water tank, to sort the waste that does not pass through the third size mesh into three stages of specific gravity ranges. Effect of the Invention

[0009] According to the present invention, a non-ferrous metal recovery line can be provided that can separate small waste materials and recover non-ferrous metals from waste materials containing a mixture of metals and non-metals, including iron and non-ferrous metals. [Brief description of the drawings]

[0010] [Figure 1]FIG. 1 is a schematic diagram of a non-ferrous metal recovery line according to an embodiment of the present invention. [Diagram 2] FIG. 4 is a schematic diagram of a non-ferrous metal recovery line according to a second embodiment of the present invention. [Diagram 3] 4 is a view of a non-ferrous metal recovery line according to a second embodiment of the present invention, as viewed from the direction of an arrow P. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] (First embodiment) Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram of a non-ferrous metal recovery line in this embodiment. The non-ferrous metal recovery line 1 of this embodiment is installed in a waste treatment facility that separates and recovers recyclable resources from crushed office equipment such as copy machines, vending machines, etc. More specifically, the non-ferrous metal recovery line 1 is installed after the so-called upstream process that recovers relatively large recyclable resources, and recovers non-ferrous metals, etc. from small-sized waste that is difficult to separate in the upstream process. In this embodiment, most of the waste treated in each process is sorted into waste of a predetermined size and specific gravity and moved to the next process. However, even after being treated in each process, a small amount of waste not included in the predetermined size and specific gravity is not prevented from moving to the next process. The non-ferrous metal recovery line 1 includes a pretreatment process (not shown), a constant volume feeder 10, a first sorting process 20, a grinding process 30, a light object removal process 40, a second sorting process 50, and a third sorting process 60.

[0012] The pre-treatment process includes a crushing process (not shown) and a sorting process (not shown). Waste from office equipment such as copy machines and vending machines, which contains a mixture of metals including iron and non-ferrous metals and non-metals, is supplied to the crushing process. The crushing process is a process for crushing the supplied office equipment such as copy machines and vending machines. The sorting process is supplied with waste crushed in the crushing process. In the sorting process, the crushed waste is sorted using a mesh of a first size A. Waste that passes through the mesh of the first size A is supplied to the constant quantity feeder 10. Waste that does not pass through the mesh of the first size A is supplied to another sorting process (not shown).

[0013] The constant-volume feeder 10 feeds a constant amount of waste that has passed through a mesh of a first size A in the pretreatment process to a first sorting process 20. The waste that has passed through the mesh of the first size A is composed of iron A1 and non-magnetic materials A2, such as copper-based materials, aluminum-based materials, resin materials, and other lightweight materials. The mesh of the first size A is preferably greater than 10 mm and less than 30 mm. It is even more preferable that the mesh of the first size A is greater than 22 mm and less than 28 mm.

[0014] The first sorting process 20 is a process for magnetically separating iron A1 contained in the supplied waste. Waste that has passed through a mesh of a first size A is supplied to the first sorting process 20 from a constant quantity feeder 10. The first sorting process 20 includes a conveyor belt 21 and a magnetic separator 22. The transport belt conveyor 21 transports the waste that has passed through the mesh of the first size A from the constant volume feeder 10 and supplies it to the grinding process 30. The magnetic separator 22 magnetically separates the iron A1 contained in the waste that has passed through a mesh of the first size A transported by the transport belt conveyor 21, thereby separating the iron A1 from non-magnetic material A2. The magnetic separator 22 is a suspended rotating drum type magnetic separator that is disposed above the transport section of the transport belt conveyor 21 midway through the transport. As a result, the iron A1 attracted by the magnet of the magnetic separator 22 is magnetically separated by being lifted up by the rotating drum shell. The magnetically separated iron A1 is collected in a collection container (not shown) and then recycled. The non-magnetic material A2 passes through the magnetic separator 22 and is then supplied to the grinding process 30 by the transport belt conveyor 21. In this embodiment, a suspended rotating drum type magnetic separator is used as the magnetic separator 22, but this is not limiting. A drum pulley type magnetic separator may be used at the tip side of the transport belt conveyor 21, and the iron A1 may be magnetically separated immediately before the non-magnetic material A2 is supplied to the grinding process 30.

[0015] The grinding process 30 is a process for grinding the supplied non-magnetic material A2. The non-magnetic material A2 constituting the waste after the iron A1 is magnetically separated by the first sorting process 20 is supplied to the grinding process 30. The grinding process 30 includes an outer drum 31, a rotor 32, a dust collector 33, and a transport belt conveyor 34. The outer drum 31 includes a repulsion blade disposed inside the outer drum 31, and one end and the other end along the axial direction of the outer drum 31 are rotatably supported by bearings. The outer drum 31 also includes a waste supply port disposed on the upstream side, an exhaust port disposed above on the downstream side, and a waste discharge port disposed below on the downstream side. The rotor 32 has repulsion vanes arranged on the outside of the rotor 32, and one end and the other end along the axial direction of the rotor 32 are rotatably supported by bearings. The outer drum 31 and the rotor 32 constitute a grinding area. The outer drum 31 and the rotor 32 rotate around the same axis. The rotation direction of the outer drum 31 and the rotation direction of the rotor 32 do not match. The outer drum 31 and the rotor 32 rotate at different speeds. In this embodiment, the rotation speed of the rotor 32 is faster than that of the outer drum 31. The outer drum 31 and the rotor 32 rotate at different speeds and in directions that do not match, thereby grinding the non-magnetic material A2. The non-magnetic material A2 is ground in the grinding process 30 and separated into a light material B and a heavy material C. The light material B is sufficiently lighter than the heavy material C. In this embodiment, the light material B is a powder made of ground glass, ceramics, or the like, and is a light material that floats in the air. The dust collector 33 collects a part of the light waste material B generated by grinding the non-magnetic material A2. The dust collector 33 is connected to the exhaust port of the outer drum 31. The transport belt conveyor 34 transports the light objects B that were not collected by the dust collector 33 and the heavy objects C, and supplies them to the light object removal process 40. The transport belt conveyor 34 is disposed below the waste discharge outlet of the outer drum 31.

[0016] The light material removing process 40 is a process for removing the light material B from the crushed waste material B and the heavy material C. The light material removing process 40 includes a casing 41, a blower 42, and a transfer belt conveyor 43. The casing 41 includes a heavy object discharge port for discharging the heavy objects C supplied from the transport belt conveyor 34, and a light object discharge port for discharging the light objects B. In addition, the casing 41 further includes an exhaust port for exhausting the sorting air supplied from the blower 42. The blower 42 supplies sorting air to the casing 41, and blows away the light objects B with the sorting air. The blown away light objects B are discharged from the light object discharge port. The heavy objects C that are not blown away by the sorting air and discharged from the heavy object discharge port are supplied to the transport belt conveyor 43. The transport belt conveyor 43 transports the heavy objects C discharged from the heavy object discharge port, and supplies them to the second sorting process 50.

[0017] In the second sorting process 50, heavy materials C, which are waste obtained by removing light materials B from the crushed waste, are sorted using a mesh of a second size D. Of the heavy materials C, waste that passes through the mesh of the second size D is supplied to a vibrating sieve 52, which will be described later. Of the heavy materials C, waste that does not pass through the mesh of the second size D is supplied to a third sorting process 60. Furthermore, in the second sorting process 50, the waste sorted by the vibrating sieve 52 is sorted into a plurality of specific gravity ranges using a plurality of water tanks.

[0018] The second sorting process 50 includes a classifier 51, a vibrating sieve 52, a first water tank 53, a first collection container 54, a second water tank 55, a second collection container 56, a transport belt conveyor 57, and a transport belt conveyor 58. The classifier 51 separates the heavy objects C supplied from the conveyor belt 43 using a mesh of the second size D. The classifier 51 includes a mesh of the second size D, an outlet for discharging waste that has passed through the mesh of the second size D, and an outlet for discharging waste that has not passed through the mesh of the second size D. In this embodiment, the heavy objects C may be classified using a trommel having a mesh of the second size D. By passing through the mesh of the second size D of the classifier 51, the heavy objects C are classified into copper-based materials D1, aluminum-based materials D2, resin materials D3, and other lightweight materials D4 that do not pass through the mesh of the second size D, and waste that has passed through the mesh of the second size D. The mesh of the second size D is preferably greater than 6 mm and less than 10 mm. It is more preferable that the mesh of the second size D is greater than 7 mm and less than 9 mm. Copper-based materials D1, aluminum-based materials D2, resin materials D3, and other lightweight materials D4 that do not pass through the mesh of the second size D are discharged from an outlet that discharges waste that does not pass through the mesh of the second size D, and are supplied to the conveyor belt 57.

[0019] The vibrating sieve 52 separates the waste that has passed through the mesh of the second size D using a mesh of a third size E. The vibrating sieve 52 is disposed downstream of a transport belt conveyor 58 that transports the waste that has passed through the mesh of the second size D of the classifier 51. Of the waste that has passed through the mesh of the second size D, the waste that has passed through the mesh of the third size E is collected as incineration waste in a flexible container or the like. Of the waste that has passed through the mesh of the second size D, the waste that does not pass through the mesh of the third size E is supplied to the first water tank 53. The mesh of the third size E is preferably 2 mm or less.

[0020] The transport belt conveyor 57 transports the copper-based materials D1, aluminum-based materials D2, resin materials D3, and other lightweight materials D4, which are waste materials that do not pass through the mesh of the second size D classified by the classifier 51, and supplies them to a third sorting process 60. The transport belt conveyor 57 is disposed downstream of a discharge outlet for discharging the waste materials that do not pass through the mesh of the second size D of the classifier 51.

[0021] In the second sorting process 50, copper-based material E1, aluminum-based material E2, and resin material E3 that do not pass through the third size E mesh are sorted into three specific gravity ranges by a first water tank 53 and a second water tank 55. The first water tank 53 and the second water tank 55, which are multi-stage water tanks, are each given vibrations of different frequencies. In addition, the second water tank 55 is placed below the first water tank 53. In this way, by changing the height at which the water tanks are placed, the waste can be supplied to the next water tank while utilizing gravity.

[0022] The first water tank 53 separates the copper-based material E1, which has the highest specific gravity, from the copper-based material E1, the aluminum-based material E2, and the resin material E3, by gravity by vibration of a predetermined frequency applied to the water in the water tank. The first water tank 53 has a supply port, a heavy material discharge port, and a light material discharge port. The copper-based material E1, the aluminum-based material E2, and the resin material E3 supplied to the first water tank 53 form layers according to specific gravity in the water tank to which vibration of a predetermined frequency is applied. The copper-based material E1, which has the highest specific gravity, forms the bottom layer of the layers according to specific gravity. The copper-based material E1 forming the bottom layer is discharged from the heavy material discharge port of the first water tank 53 and collected in the first collection container 54. The layer of the aluminum-based material E2 and the resin material E3 formed on the upper side of the copper-based material E1 is discharged from the light material discharge port and supplied to the second water tank 55.

[0023] The second water tank 55 separates the aluminum-based material E2 and the resin material E3, which has a high specific gravity, by gravity by applying vibration of a predetermined frequency to the water in the tank. The second water tank 55 has a supply port, a heavy material discharge port, and a light material discharge port. The aluminum-based material E2 and the resin material E3 supplied to the second water tank 55 form layers according to specific gravity in the tank to which vibration of a predetermined frequency is applied. The aluminum-based material E2, which has a high specific gravity, forms the bottom layer of the layers according to specific gravity. The aluminum-based material E2 forming the bottom layer is discharged from the heavy material discharge port of the second water tank 55 and collected in the second collection container 56. The layer of the resin material E3 formed on the upper side of the aluminum-based material E2 is discharged from the light material discharge port and collected by a flexible container or the like as incineration waste.

[0024] In the third sorting process 60, the waste that does not pass through the mesh of the second size D in the second sorting process 50 is sorted into a plurality of specific gravity ranges by a plurality of tanks. Specifically, in the third sorting process 60, the copper-based material D1 that is larger than 8 mm and smaller than 25 mm and does not pass through the mesh of the second size D, the aluminum-based material D2, the resin material D3, and other lightweight materials D4 are sorted into four specific gravity ranges by three tanks, the third tank 61, the fourth tank 63, and the fifth tank 65, which will be described later. The third tank 61, the fourth tank 63, and the fifth tank 65, which are the plurality of tanks, are each given vibrations of different frequencies. In addition, the fourth tank 63 is arranged below the third tank 61, and the fifth tank 65 is arranged below the fourth tank 63. Thereby, by sequentially changing the height at which the tanks are arranged, the waste can be supplied to the next tank while utilizing gravity.

[0025] The third sorting process 60 includes a third water tank 61 , a third collection container 62 , a fourth water tank 63 , a fourth collection container 64 , a fifth water tank 65 , and a fifth collection container 66 . The third water tank 61 separates the copper-based material D1, which has the highest specific gravity, by vibration of a predetermined frequency applied to the water in the water tank. The third water tank 61 has a supply port, a heavy material discharge port, and a light material discharge port. The copper-based material D1, the aluminum-based material D2, the resin material D3, and the other light materials D4 supplied to the third water tank 61 form layers according to specific gravity in the water tank to which vibration of a predetermined frequency is applied. The copper-based material D1, which has the highest specific gravity, forms the bottom layer of the layers according to specific gravity. The copper-based material D1 forming the bottom layer is discharged from the heavy material discharge port of the third water tank 61 and collected in the third collection container 62. The layer of the aluminum-based material D2, the resin material D3, and the other light materials D4 formed on the upper side of the copper-based material D1 is discharged from the light material discharge port and supplied to the fourth water tank 63. In the grinding step 30, the copper-based material D1 has its surface polished when it is ground by the outer drum 31 and the rotor 32. Furthermore, in the third sorting step 60, the surface is washed by passing through water in the third water tank 61. This makes it easy to separate copper material close to pure copper, which is an example of the copper-based material D1, from brass, which is an alloy of copper and zinc, by color.

[0026] The fourth water tank 63 separates the aluminum-based material D2, which has a high specific gravity, from the aluminum-based material D2, the resin material D3, and the other lightweight materials D4 by specific gravity by vibration of a predetermined frequency applied to the water in the water tank. The fourth water tank 63 has a supply port, a heavy material discharge port, and a lightweight material discharge port. The aluminum-based material D2, the resin material D3, and the other lightweight materials D4 supplied to the fourth water tank 63 form layers according to specific gravity in the water tank to which vibration of a predetermined frequency is applied. The aluminum-based material D2, which has a high specific gravity, forms the bottom layer of the layers according to specific gravity. The aluminum-based material D2 forming the bottom layer is discharged from the heavy material discharge port of the fourth water tank 63 and collected in the fourth collection container 64. In addition, the layer of the resin material D3 and the other lightweight materials D4 formed on the upper side of the aluminum-based material D2 is discharged from the lightweight material discharge port and supplied to the fifth water tank 65.

[0027] The fifth water tank 65 separates the resin material D3 having a high specific gravity from the resin material D3 and the other lightweight materials D4 by gravity by applying vibration of a predetermined frequency to the water in the tank. The fifth water tank 65 has a supply port, a heavy material discharge port, and a lightweight material discharge port. The resin material D3 and the other lightweight materials D4 supplied to the fifth water tank 65 form layers according to specific gravity in the water tank to which vibration of a predetermined frequency is applied. The resin material D3 having a high specific gravity forms the bottom layer of the layers according to specific gravity. The resin material D3 forming the bottom layer is discharged from the heavy material discharge port of the fifth water tank 65 and collected in a fifth collection container 66. The layer of the other lightweight materials D4 formed on the upper side of the resin material D3 is discharged from the lightweight material discharge port and collected by a flexible container or the like as incineration waste. This makes it possible to continuously separate waste containing a mixture of metals and non-metals, including iron and non-ferrous metals, supplied to the non-ferrous metal recovery line 1, and recover the non-ferrous metals.

[0028] The non-ferrous metal recovery line 1 of the present embodiment described above provides the following effects.

[0029] (1) The nonferrous metal recovery line 1 of this embodiment is a nonferrous metal recovery line 1 from waste in which metals and nonmetals including iron A1 and nonferrous metals are mixed, and includes a first sorting process 20 for magnetically separating iron A1 contained in the waste that has passed through a first size A mesh, a grinding process 30 for grinding the waste from which iron A1 has been separated, a second sorting process 50 for classifying the ground waste into waste that has passed through a second size D mesh and waste that has not passed through the second size D mesh, and a third sorting process 60 for sorting the waste that has not passed through the second size D mesh in the second sorting process 50 into multiple specific gravity ranges using multiple water tanks, each of which is given a vibration of a different frequency. This allows sorting and recovery of nonferrous metals from waste in which metals and nonmetals including iron and nonferrous metals are mixed.

[0030] (2) In the non-ferrous metal recovery line 1 described in (1), the first mesh size A is greater than 10 mm and equal to or less than 30 mm, and the second mesh size D is greater than 6 mm and equal to or less than 10 mm, and the third sorting process 60 has three stages of water tanks, the first to third water tanks, and waste that does not pass through the second mesh size D is sorted into four stages of specific gravity ranges. This makes it possible to recover non-ferrous metals by sorting waste containing a mixture of metals and non-metals, including small sized ferrous and non-ferrous metals, which would have been sorted manually by humans.

[0031] (3) In the non-ferrous metal recovery line 1 described in (1) or (2), the second sorting step 50 further includes a step of vibrating and separating the waste that has passed through the mesh of the second size D into waste that has passed through a mesh of a third size E and waste that has not passed through the mesh of the third size E, the mesh of the third size E being 2 mm or less. This makes it possible to separate and recover non-ferrous metals from waste in which metals and non-metals, including non-ferrous metals, of smaller sizes are mixed.

[0032] (4) In the non-ferrous metal recovery line 1 described in (1) to (3), the second sorting process 50 has two stages of tanks, a fourth and a fifth tank, and includes a process of sorting waste that has passed through a third mesh size E into three specific gravity ranges. This makes it possible to sort and recover non-ferrous metals from waste that contains a mixture of metals and non-metals, including ferrous and non-ferrous metals, of smaller sizes that would be difficult to sort manually.

[0033] Second embodiment Next, a second embodiment will be described with reference to Figures 2 and 3. Note that a description of the same configuration as in the first embodiment will be omitted.

[0034] Fig. 2 is a schematic plan view of a non-ferrous metal recovery line 1 according to a second embodiment of the present invention. Fig. 3 is a view of the non-ferrous metal recovery line 1 according to the second embodiment as seen from the direction of an arrow P. The non-ferrous metal recovery line 1 includes a pretreatment process (not shown), a constant volume feeder 10, a first sorting process 20, a grinding process 30, a dust collector 33, a vertical conveying process 70, a high-magnetic force sorting process 80, a second sorting process 50, and a third sorting process 60.

[0035] In this embodiment, the pre-treatment process includes a crushing process (not shown) and a sorting process (not shown). Waste from office equipment such as copy machines, vending machines, etc., containing a mixture of metals including iron and non-ferrous metals and non-metals, is supplied to the crushing process. The crushing process is a process for crushing the supplied office equipment such as copy machines, vending machines, etc. The sorting process is supplied with waste crushed in the crushing process. In the sorting process, the crushed waste is sorted using a mesh of a first size A. Waste that does not pass through the mesh of the first size A is supplied to another sorting process (not shown). The waste that has passed through the mesh of the first size A is supplied to the constant-volume feeder 10. In addition, it is preferable that the waste that has passed through the mesh of the first size A is mainly separated into copper-based materials and aluminum-based materials by an eddy current separator, and then the waste is supplied to the constant-volume feeder 10. As a result, the sorted copper-based and aluminum-based materials are mainly supplied to the constant-quantity feeder 10, and most of the waste such as glass and ceramics is not supplied to the constant-quantity feeder 10. Since the content of light materials B in the waste ground in the grinding process 30 becomes very small, most of the light materials B can be recovered by the dust collector 33. In such a non-ferrous metal recovery line 1, it is possible to recover non-ferrous metals by sorting from waste in which metals and non-metals, including iron and non-ferrous metals, are mixed, without being provided with a light material removal process 40.

[0036] 2, the first sorting step 20 extends in a first direction in a plan view. The first direction is the left-right direction on the paper in FIG.

[0037] 2, the grinding process 30 extends in a direction intersecting with the first direction from the downstream side of the first sorting process 20 in a plan view. The direction intersecting with the first direction is the up-down direction on the paper in FIG. 2. The grinding process 30 includes an outer drum 31 and a rotor 32. The dust collector 33 includes a dust collector body 35 and a dust collection duct 36. The grinding process 30 is connected to the downstream side of the first sorting process 20. The dust collector body 35 is disposed on the upstream side of the grinding process 30. The dust collection duct 36 connects the dust collector body 35 and the grinding process 30, and the upstream side of the dust collection duct 36 is connected to the downstream side of the grinding process 30. In addition, the downstream side of the dust collection duct 36 is connected to the dust collector body 35. By disposing the dust collector body 35 upstream of the grinding process 30, the overall length of the non-ferrous metal recovery line 1 can be shortened.

[0038] The vertical conveying process 70 is disposed between the grinding process 30 and the second sorting process 50, and conveys the waste ground in the grinding process 30 in an approximately vertically upward direction and supplies it to the second sorting process 50. In this embodiment, as shown in Fig. 2, the high magnetic force sorting process 80 is disposed downstream of the vertical conveying process 70, and the second sorting process 50 is disposed downstream of the high magnetic force sorting process 80. Specifically, the ground waste is supplied to the vertical conveying process 70, where the waste is conveyed in an approximately vertical upward direction. The conveyed waste is supplied to the high magnetic force separating process 80.

[0039] The high magnetic force sorting process 80 is disposed between the vertical conveying process 70 and the second sorting process 50. The high magnetic force sorting process 80 is a process for sorting, by high magnetic force, stainless steel materials that have been attached to copper-based or aluminum-based materials and supplied to the non-ferrous metal recovery line 1, although most of the stainless steel materials have been sorted out by the eddy current sorter in the pre-treatment process. When the waste is crushed in the crushing process 30, it is struck by the outer drum 31 and the rotor 32 and becomes round, thereby becoming magnetic. The magnetic nature of the waste makes it easier to magnetically separate the waste in the high magnetic force sorting process 80. In particular, it makes it easier to magnetically separate the stainless steel materials that have been attached to copper-based or aluminum-based materials. The high-force magnetic separation process 80 receives the ground waste from the vertical conveying process 70, magnetically separates the stainless steel materials attached to the copper-based or aluminum-based materials, and then supplies the waste to the second separation process 50.

[0040] 3, the second sorting process 50 extends from above to below. In this embodiment, the second sorting process 50 includes a vibrating sieve 52, a first water tank 53, a first collection container 54, a second water tank 55, and a second collection container 56. The vibrating sieve 52 includes a mesh of a second size D and a mesh of a third size E. The mesh of the second size D is disposed in an upper stage of the vibrating sieve 52, and the mesh of the third size E is disposed in a lower stage of the vibrating sieve 52. The vibrating sieve 52 vibrates and separates the waste material supplied from the high magnetic force separation process 80 from above downward. Specifically, by vibrating and sorting the waste using a mesh of a second size D located on the upper level of the vibrating sieve 52, the waste is separated into copper-based materials D1, aluminum-based materials D2, resin materials D3, and other lightweight materials D4 that do not pass through the mesh of the second size D, and waste that has passed through the mesh of the second size D. The copper-based material D1, the aluminum-based material D2, the resin material D3, and other lightweight materials D4 that do not pass through the mesh of the second size D are supplied to a third sorting process 60. The waste that passes through the mesh of the second size D is further vibrated and sorted using a mesh of a third size E located at the lower level of the vibrating sieve 52, whereby the waste is separated into copper-based materials E1, aluminum-based materials E2, and resin materials E3 that do not pass through the mesh of the third size E, and waste that passes through the mesh of the third size E. The waste that passes through the mesh of the third size E is collected as incineration waste in a flexible container or the like. The waste that does not pass through the mesh of the third size E is supplied to the first water tank 53.

[0041] 2, the third sorting step 60 extends in the first direction facing the first sorting step. In this embodiment, the third sorting step 60 is disposed in parallel with the first water tank 53 and the second water tank 55 of the second sorting step. This allows the area occupied by the non-ferrous metal recovery line 1 to be made smaller.

[0042] The non-ferrous metal recovery line 1 of the present embodiment described above provides the following effects.

[0043] (5) The non-ferrous metal recovery line 1 of this embodiment is further provided with a vertical conveying process 70 which is disposed between the grinding process 30 and the second sorting process 50 and conveys the waste ground in the grinding process 30 in an approximately vertically upward direction and supplies it to the second sorting process 50, wherein the first sorting process 20 extends in a first direction in a planar view, the grinding process 30 extends in a direction intersecting the first direction from the downstream side of the first sorting process 20 in a planar view, the second sorting process 50 extends from above downward, and the third sorting process 60 extends in the first direction opposite the first sorting process 20. As a result, by arranging the multiple processes of the nonferrous metal recovery line 1 three-dimensionally and arranging the waste supply position and the sorted waste discharge position on the same side, it is possible to reduce the footprint of the nonferrous metal recovery line 1. Furthermore, in a nonferrous metal recovery line whose overall length is long due to arranging the processes in sequence in one direction, it was necessary to arrange a large number of operators because operators are arranged for each predetermined range, but in this embodiment, the waste supply position and the sorted waste discharge position are close to each other and further the overall length of the nonferrous metal recovery line 1 can be shortened, so the number of operators required can be reduced.

[0044] (6) In the non-ferrous metal recovery line 1 described in (5), the grinding process 30 further includes a dust collector 33, which includes a dust collector main body 35 and a dust collection duct 36. The dust collector main body 35 is disposed upstream of the grinding process 30, and the dust collection duct 36 connects the dust collector main body 35 and the grinding process 30. The upstream side of the dust collection duct 36 is connected to the downstream side of the grinding process 30. This allows the overall length of the non-ferrous metal recovery line 1 to be shortened.

[0045] According to the non-ferrous metal recovery line 1 according to the second embodiment described above, the same effects as those (1) to (4) described in the first embodiment are achieved.

[0046] Although the embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and various changes, modifications, and combinations are possible. [Explanation of symbols]

[0047] 1. Non-ferrous metals recovery line 20 First sorting process 30 Milling process 33 Dust collector 35 Dust collector body 36 Dust collection duct 50 Second sorting process 60 Third sorting process 70 Vertical conveying process

Claims

1. A non-ferrous metal recovery line from waste containing mixed metals and non-metals, including iron and non-ferrous metals, comprising: a first separation step of magnetically separating the iron contained in the waste that has passed through a mesh of a first size; a grinding step of grinding the waste from which the iron has been separated; A second sorting step of classifying the ground waste into waste that has passed through a mesh of a second size and waste that has not passed through a mesh of the second size; A third sorting process in which waste that does not pass through the second size mesh in the second sorting process is sorted into a plurality of specific gravity ranges using a plurality of water tanks, A non-ferrous metal recovery line, wherein each of the multiple stages of water tanks is subjected to vibrations of a different frequency.

2. The first size of mesh is greater than 10 mm and less than or equal to 30 mm, The second size of mesh is greater than 6 mm and less than or equal to 10 mm, The third selection step includes: The apparatus has three tanks, namely, the first tank, the second tank, and the third tank.

2. The non-ferrous metal recovery line of claim 1, wherein waste that does not pass through the second size mesh is separated into four ranges of specific gravity.

3. The second selection step includes: The method includes a step of vibrationally separating the waste that has passed through the second size mesh into waste that has passed through a third size mesh and waste that has not passed through the third size mesh, 3. A non-ferrous metal recovery line according to claim 1 or 2, wherein the third size of mesh is 2 mm or less.

4. The second selection step includes: The apparatus has two tanks, a fourth tank and a fifth tank, 4. The non-ferrous metal recovery line according to claim 3, wherein waste that does not pass through the third size mesh is separated into three ranges of specific gravity.

5. A vertical conveying step is disposed between the grinding step and the second sorting step, and conveys the waste ground in the grinding step in an approximately vertical direction upward and supplies the waste to the second sorting step. The first sorting process extends in a first direction in a plan view, The grinding step extends in a direction intersecting with the first direction from a downstream side of the first sorting step in a plan view, The second sorting step extends from above to below, The non-ferrous metal recovery line according to claim 1 , wherein the third sorting process extends in the first direction opposite the first sorting process.

6. The grinding process further comprises a dust collector, The dust collector includes a dust collector body and a dust collection duct. The dust collector body is disposed upstream of the grinding process, 3. The non-ferrous metal recovery line according to claim 1, wherein the dust collection duct connects the dust collector body and the grinding process, and an upstream side of the dust collection duct is connected to a downstream side of the grinding process.

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