Steel strand sorting system, sorting line and sorting method

Abstract

The invention discloses a steel strand sorting system, a sorting line and a sorting method, and belongs to the technical field of steel strand recycling, the steel strand sorting system comprises a shredding machine, a roller magnetic separator and a belt magnetic separator, the roller magnetic separator is used for sorting a mixture, and by means of the characteristics of simple structure and large handling capacity of the roller magnetic separator, a large amount of initial mixture is quickly sorted, so that the handling efficiency is improved, and the labor intensity of workers is reduced. And meanwhile, the belt magnetic separator is used for carrying out secondary auxiliary separation on the mixture separated by the roller magnetic separator, and the fine separation of the mixture is realized by utilizing the characteristics of high magnetic field gradient, good separation effect and strong continuous operation capability of the belt magnetic separator, so that the effective separation of the steel core and the aluminum core is ensured, and the waste of steel resources is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of steel strand recycling, and in particular to a steel strand sorting system, a sorting line and a sorting method. Background Art

[0002] Steel stranded wire, also known as "steel core aluminum stranded wire", has the characteristics of low resistance, high mechanical strength and stable conductivity. It is mainly used in high-voltage transmission lines, urban rail transit contact networks and other occasions as an important component of conductive lines.

[0003] In order to improve economic benefits and avoid environmental pollution, scrap steel strands need to be recycled. Currently, there are two ways to recycle scrap steel strands. One is to shear, bend, stretch and other processing methods on the recycled steel strands according to their purpose and market demand for subsequent use; the other is to crush, smelt and other processes that cannot be used directly to extract useful metals from them for the production of new products.

[0004] For steel strands that cannot be used directly, the existing processing methods of crushing and smelting are relatively high in energy consumption and may produce harmful gases and dust. If not handled properly, pollutants may be discharged into the atmosphere, water bodies and soil, causing environmental pollution. At the same time, pollutant treatment also increases production costs, and the metal recovery rate in the smelting process is limited. Some metals may be lost in the form of oxides, slag, etc., reducing the metal recovery rate and causing waste of resources. In addition, the existing steel strand recovery and processing equipment is not reasonably laid out and occupies a large space in the factory. Summary of the invention

[0005] In order to solve the technical problem in the above-mentioned background technology that the steel strands that cannot be directly utilized are currently processed by crushing and smelting, which will cause environmental pollution and waste of metal resources, the present invention provides a steel strand sorting line.

[0006] The technical solution of the present invention is as follows: The present invention provides a steel strand sorting system, comprising a shredder, wherein a feed port of the shredder is connected to a first conveying line, an automatic flipping mechanism is installed at one end of the first conveying line away from the shredder, the automatic flipping mechanism can automatically flip a transfer box, so that the steel strand segments in the transfer box are placed on the first conveying line, the discharge port of the shredder is connected to the feed port of a drum magnetic separator through a second conveying line, the drum magnetic separator is used for the initial sorting of steel cores and aluminum cores, the steel core discharge port of the drum magnetic separator is connected to a tray buffer area through a third conveying line, the mixed material discharge port of the drum magnetic separator is connected to the feed port of a belt magnetic separator, and the belt magnetic separator The steel core outlet is connected to the third conveyor line through the fourth conveyor line, and the aluminum core outlet of the belt magnetic separator is connected to the pallet buffer area through the fifth conveyor line. The mixture is first sorted by a drum magnetic separator. The drum magnetic separator has the characteristics of simple structure and large processing capacity, and a large amount of initial mixture can be quickly sorted to improve processing efficiency. At the same time, the belt magnetic separator is used to perform secondary auxiliary sorting on the mixture sorted by the drum magnetic separator. The belt magnetic separator has the characteristics of high magnetic field gradient, good separation effect, and strong continuous operation capability, and the mixture can be finely sorted to ensure effective separation of the steel core and the aluminum core and avoid waste of steel resources.

[0007] Preferably, the first conveyor line is a scale conveyor line, which has large conveying capacity and low energy consumption. It can be installed horizontally or on a slope and can adapt to the feeding needs of the shredder. The second conveyor line is a vibrating conveyor line, which can generate vibration force through the vibrator to make the material on the conveyor line vibrate continuously, which not only helps to evenly distribute the material, but also effectively prevents blockage and sticking of the material during the conveying process.

[0008] The present invention also provides a steel strand sorting line, comprising a stockpiling area, and also comprising: a pretreatment area for cutting the steel strands into segments; a steel strand segment temporary storage area, connected to the pretreatment area through a conveyor belt, the steel strand segment temporary storage area being provided with a transfer box for accommodating the steel strand segments; a steel strand segment decomposition area, connected to the steel strand segment temporary storage area through a feeder, for decomposing the steel strand segments into steel cores and aluminum cores and sorting them; a pallet buffer area, connected to the steel strand segment decomposition area through a classification conveyor line group, for classified caching of steel cores and aluminum cores after sorting; a coding and handling area, connected to the pallet buffer area and the storage area through a conveyor line, capable of realizing automatic decomposition, classification and storage of the steel strands, with a high overall degree of automation and low labor intensity, and without the need for smelting treatment of the steel strands, thereby saving energy and avoiding environmental pollution, while having a high metal recovery rate and without oxide and other losses, and realizing the classification of the steel core and the aluminum core, avoiding the doping pollution between the metals caused by smelting, and ensuring the purity of the metal.

[0009] Preferably, the stockpiling area and the pretreatment area are both arranged outside the factory area. A steel grabber is provided in the stockpiling area. The steel grabber is an automatic robot to realize automatic grabbing and transfer of steel strands, improve the degree of automation, and reduce labor intensity. A gantry shear is provided in the pretreatment area to facilitate the cutting operation of the steel strands.

[0010] Preferably, the steel strand segment decomposition area is located on one side of the steel strand segment temporary storage area to rationally utilize the space within the factory.

[0011] Preferably, the pallet buffer area is divided into a steel core buffer area and an aluminum core buffer area, the pallet buffer area is connected to the storage area through a sixth conveyor line, and an automatic handling mechanism is provided at the pallet buffer area to facilitate the classification and automatic handling of pallets.

[0012] Preferably, the coding and handling area includes a sorting and coding machine and a stacker. The overall coding machine is arranged on the sixth conveyor line, and the stacker is located near the storage area to realize coding and classification storage of pallets.

[0013] The present invention also provides a sorting method, which is as follows: The steel grabber grabs the steel strands in the stockpile area and takes them to the pre-processing area for segment cutting. The steel strand segments are then transported to the steel strand segment temporary storage area via a conveyor belt. The feeder automatically transports the transfer box containing the steel strand segments to the steel strand segment decomposition area for decomposition and sorting, and caches the sorted steel core and aluminum core in the designated tray in the tray buffer area; The pallets with steel core / aluminum core are transported to the storage area through the sixth conveyor line. During the transportation of the pallets, the overall coding machine codes and marks the pallets, and the stacker moves the coded pallets to the designated place for storage.

[0014] Preferably, the decomposition and separation process of the steel core and the aluminum core is as follows: The transfer box is placed on the automatic flipping mechanism, which flips the steel strand segments in the transfer box to the first conveyor line. After the flipping is completed, it is reset, and the feeder puts the empty transfer box back to the temporary storage area of ​​the steel strand segments; The first conveyor line conveys the steel strand segments to the shredder, and the shredded mixture is conveyed to the drum magnetic separator for sorting through the second conveyor line. The mixture after the primary sorting is discharged to the belt magnetic separator for secondary sorting. The steel cores after the primary and secondary sorting are conveyed to the tray at the steel core buffer area through the conveyor line, and the aluminum core is conveyed to the tray at the aluminum core buffer area through the conveyor line.

[0015] It can be seen from the above technical solutions that the advantages of the present invention are: 1. Use a drum magnetic separator to sort the mixture. The drum magnetic separator has the characteristics of simple structure and large processing capacity, so as to realize large-scale and rapid sorting of the initial mixture to improve the processing efficiency. With the use of a vibrating conveyor line, it can ensure the uniform distribution of the initial mixture, thereby improving the sorting effect and efficiency. At the same time, this embodiment uses a belt magnetic separator to perform secondary auxiliary sorting on the mixture after sorting by the drum magnetic separator. The belt magnetic separator has the characteristics of high magnetic field gradient, good separation effect and strong continuous operation capacity, so as to realize fine sorting of the mixture to ensure effective separation of the steel core and the aluminum core, avoid waste of steel resources, and do not need to smelt the steel strands, thus saving energy and avoiding environmental pollution. At the same time, the metal recovery rate is high, and there will be no loss of oxides, etc., and the classification of the steel core and the aluminum core is realized, avoiding the doping pollution between the metals caused by smelting, and ensuring the purity of the metal.

[0016] 2. The stacking area, pretreatment area, temporary storage area for steel strand segments, decomposition area for steel strand segments, pallet buffer area, coding and handling area and storage area are set up, and the location of each work area and the interconnection relationship are reasonably planned. The entire sorting line uses conveyor lines, transporters and other working devices to assist in the transportation of materials, which can reduce the distance between the work areas as much as possible, thereby realizing the reasonable planning and layout of the space within the factory.

[0017] 3. The steel strand sorting line is used to cut, decompose, sort, cache, code and store the steel strands. It can realize the decomposition, classification and storage of the steel strands. The overall automation level is high and the labor intensity is low. There is no need to melt the steel strands, which saves energy and avoids environmental pollution. At the same time, the metal recovery rate is high, and there will be no loss of oxides, etc. The classification of steel core and aluminum core is realized, which avoids the doping pollution between metals caused by smelting and ensures the purity of the metal. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the present invention, the accompanying drawings required for use in the description will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the overall layout structure of a steel strand sorting line according to one or more embodiments of the present invention; Figure 2 It is a schematic diagram of the enlarged structure of the decomposition area of ​​the steel strand segment according to one or more embodiments of the present invention; The components represented by the reference numerals in the figure are: 1. Stacking area; 2. Steel grabber; 3. Gantry shear; 4. Temporary storage area for steel strand segments; 5. Feeder; 6. First conveyor line; 7. Shredder; 8. Second conveyor line; 9. Drum magnetic separator; 10. Belt magnetic separator; 11. Third conveyor line; 12. Fourth conveyor line; 13. Fifth conveyor line; 14. Pallet buffer area; 15. Sixth conveyor line; 16. Sorting and coding machine; 17. Stacker; 18. Storage area. DETAILED DESCRIPTION

[0020] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical scheme of the present invention will be clearly and completely described below in conjunction with the drawings in this specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0021] Example 1 In a typical embodiment of the present invention, Figure 2 As shown, a steel strand sorting system is proposed, including a first conveyor line 6, a shredder 7, a second conveyor line 8, a drum magnetic separator 9, and a belt magnetic separator 10. One end of the first conveyor line 6 is connected to the feed port of the shredder 7 for conveying the steel strand segments into the shredder 7. The shredder 7 can shred and discharge the input steel strand segments. The discharge port of the shredder 7 is connected to the feed port of the drum magnetic separator 9 through the second conveyor line 8, so that the crushed mixture can be fed into the drum magnetic separator 9 to use the drum magnetic separator 9 to sort the mixture. In this embodiment, the first conveyor line 6 is a scale conveyor line with large conveying capacity and low energy consumption. It can be installed horizontally or on a slope, and can meet the feeding needs of the shredder 7. The second conveyor line 8 is a vibrating conveyor line. The second conveyor line 8 contains a vibrator, which can generate a vibration force through the vibrator to make the material on the conveyor line vibrate continuously, which not only helps to evenly distribute the material, but also effectively prevents the material from being blocked and sticky during the transportation process.

[0022] The drum magnetic separator 9 has two discharge ports, one for the steel core and the other for the mixture. An electric control valve is respectively provided at the two discharge ports of the drum magnetic separator 9 to realize automatic opening and closing of the corresponding discharge ports. The classification conveyor line group includes a third conveyor line 11, a fourth conveyor line 12 and a fifth conveyor line 13, wherein the steel core discharge port of the drum magnetic separator 9 is connected to the tray buffer area 14 through the third conveyor line 11 to convey the sorted steel core to the tray buffer area 14, and the mixture discharge port of the drum magnetic separator 9 is connected to the feed port of the belt magnetic separator 10 to deliver the steel core and aluminum core mixture to the belt magnetic separator 10 for secondary sorting. The belt magnetic separator 10 also has two outlets, namely, a steel core outlet and an aluminum core outlet. The steel core outlet is connected to the third conveyor line 11 through the fourth conveyor line 12 to realize the collection and storage of the steel core, and the aluminum core outlet is connected to the tray buffer area 14 through the fifth conveyor line 13 to be used for caching the aluminum core.

[0023] In this embodiment, the drum magnetic separator 9 is first used to sort the mixture. The drum magnetic separator 9 has the characteristics of simple structure and large processing capacity, so as to realize large-scale rapid sorting of the initial mixture to improve the processing efficiency. With the use of a vibrating conveyor line, it can ensure the uniform distribution of the initial mixture, thereby improving the sorting effect and efficiency. At the same time, this embodiment uses a belt magnetic separator 10 to perform secondary auxiliary sorting on the mixture sorted by the drum magnetic separator 9. The belt magnetic separator has the characteristics of high magnetic field gradient, good separation effect and strong continuous operation capacity, so as to realize fine sorting of the mixture, thereby ensuring the effective separation of the steel core and the aluminum core and avoiding the waste of steel resources.

[0024] Example 2 In a typical embodiment of the present invention, Figure 1As shown, a steel strand sorting line is proposed, comprising: a stacking area 1, a pretreatment area, a steel strand segment temporary storage area 4, a steel strand segment decomposition area, a pallet buffer area 14, a coding and handling area and a storage area 18, wherein the stacking area 1 and the pretreatment area are both arranged outside the factory area, and the steel strand segment temporary storage area 4, the steel strand segment decomposition area, the pallet buffer area 14, the coding and handling area and the storage area 18 are all arranged within the factory area, wherein the stacking area 1 is used for stacking recycled steel strands, and a steel grabber 2 is provided in the stacking area 1, which can automatically grab and transfer the stacked steel strands to the pretreatment area through the steel grabber 2, so that the steel strands are sheared in the pretreatment area to cut the steel strands into steel strand segments of specified lengths; the steel strand segment temporary storage area 4 is connected to the pretreatment area through a conveyor belt, and a number of transfer boxes are arranged in the steel strand segment temporary storage area 4 , so as to accommodate the steel strand segments through the transfer box, the steel strand segment decomposition area is used for the decomposition and sorting of the steel strand segments; the steel strand segment decomposition area is used to decompose the steel strand segments into steel cores and aluminum cores and sort them, the steel strand segment decomposition area is connected to the steel strand segment temporary storage area 4 through a feeder 5, the feeder 5 is an AGV robot, the feeder 5 can automatically transport the transfer box containing the steel strand segments in the steel strand segment temporary storage area 4 to the steel strand segment decomposition area according to the set program; the pallet buffer area 14 is used for the classified storage of the steel core and the aluminum core after decomposition and sorting, and the pallet buffer area is placed with pallets for holding the steel core and the aluminum core; the coding and transportation area is connected to the pallet buffer area 14 and the storage area 18 through a conveyor line, and is used to classify, code and transport the pallets in the pallet buffer area 14, so as to classify and store the steel core pallets and the aluminum core pallets.

[0025] It should be noted that the steel core and the aluminum core described in this embodiment are both broken pieces or fragments, rather than complete strip structures.

[0026] Specifically, the steel grabber 2 is an automatic robot that can grab the steel strands in the stockpiling area 1 and transport them to the pre-processing area according to a set program. Figure 1 As shown, a gantry shear 3 is provided in the pre-processing area, and the steel strand can be cut into segments by the gantry shear 3. The gantry shear 3 is connected to the steel strand segment temporary storage area 4 through a conveyor belt, and the steel strand segments are transported to the designated transfer box through the conveyor belt.

[0027] The steel strand segment decomposition area is located on one side of the steel strand segment temporary storage area 4 to rationally utilize the space in the factory, such as Figure 2As shown, the steel strand segment decomposition area includes a first conveyor line 6, a shredder 7, a second conveyor line 8, a drum magnetic separator 9, a belt magnetic separator 10 and a classification conveyor line group. The first conveyor line 6 is located on one side of the steel strand segment temporary storage area 4. One end of the first conveyor line 6 is connected to the feed port of the shredder 7 for conveying the steel strand segments into the shredder 7. An automatic flipping mechanism is installed at one end of the first conveyor line 6 away from the shredder 7. After the feeder 5 transports the transfer box to the automatic flipping mechanism, the automatic flipping mechanism can automatically flip the transfer box, so that the steel strand segments in the transfer box are placed on the first conveyor line 6. After the flipping is completed, the automatic flipping mechanism will automatically reset, and the feeder 5 can put the empty transfer box back to the steel strand segment temporary storage area 4.

[0028] The shredder 7 can shred and discharge the input steel strand segments. The discharge port of the shredder 7 is connected to the feed port of the drum magnetic separator 9 through the second conveyor line 8, so that the crushed mixture can be fed into the drum magnetic separator 9 to use the drum magnetic separator 9 to sort the mixture. In this embodiment, the first conveyor line 6 is a scale conveyor line with large conveying capacity and low energy consumption. It can be installed horizontally or on a slope, and can meet the feeding needs of the shredder 7. The second conveyor line 8 is a vibrating conveyor line. The second conveyor line 8 contains a vibrator, which can generate a vibration force through the vibrator to make the material on the conveyor line vibrate continuously, which not only helps to evenly distribute the material, but also effectively prevents the material from being blocked and sticky during the transportation process.

[0029] The drum magnetic separator 9 has two discharge ports, one for the steel core and the other for the mixture. An electric control valve is respectively provided at the two discharge ports of the drum magnetic separator 9 to realize automatic opening and closing of the corresponding discharge ports. The classification conveyor line group includes a third conveyor line 11, a fourth conveyor line 12 and a fifth conveyor line 13, wherein the steel core discharge port of the drum magnetic separator 9 is connected to the tray buffer area 14 through the third conveyor line 11 to convey the sorted steel core to the tray buffer area 14, and the mixture discharge port of the drum magnetic separator 9 is connected to the feed port of the belt magnetic separator 10 to deliver the steel core and aluminum core mixture to the belt magnetic separator 10 for secondary sorting. The belt magnetic separator 10 also has two outlets, namely, a steel core outlet and an aluminum core outlet. The steel core outlet is connected to the third conveyor line 11 through the fourth conveyor line 12 to realize the collection and storage of the steel core, and the aluminum core outlet is connected to the tray buffer area 14 through the fifth conveyor line 13 to be used for caching the aluminum core.

[0030] In this embodiment, the drum magnetic separator 9 is first used to sort the mixture. The drum magnetic separator 9 has the characteristics of simple structure and large processing capacity, so as to realize large-scale rapid sorting of the initial mixture to improve the processing efficiency. With the use of a vibrating conveyor line, it can ensure the uniform distribution of the initial mixture, thereby improving the sorting effect and efficiency. At the same time, this embodiment uses a belt magnetic separator 10 to perform secondary auxiliary sorting on the mixture sorted by the drum magnetic separator 9. The belt magnetic separator has the characteristics of high magnetic field gradient, good separation effect and strong continuous operation capacity, so as to realize fine sorting of the mixture, thereby ensuring the effective separation of the steel core and the aluminum core and avoiding the waste of steel resources.

[0031] The pallet buffer area 14 is divided into a steel core buffer area and an aluminum core buffer area. The steel core buffer area is connected to the steel core discharge port of the drum magnetic separator 9 and the steel core outlet of the belt magnetic separator 10 through the third conveyor line 11 and the fourth conveyor line 12. The aluminum core buffer area is connected to the aluminum core outlet of the belt magnetic separator 10 through the fifth conveyor line 13, thereby realizing the classified caching of steel cores and aluminum cores. Pallets for caching are respectively provided at the steel core buffer area and the aluminum core buffer area.

[0032] The pallet buffer area 14 is connected to the coding and handling area and the storage area 18 in sequence through the sixth conveyor line 15. The sixth conveyor line 15 is a roller conveyor line for conveying pallets. An automatic handling mechanism is provided at the pallet buffer area 14, which can automatically transport the pallet to the sixth conveyor line 15. The coding and handling area includes a sorting and coding machine 16 and a stacker 17, wherein the overall coding machine 16 is arranged on the sixth conveyor line 15 for coding and marking the pallets on the sixth conveyor line 15. The stacker 17 is located near the storage area 18. The stacker 17 is used to transport the coded pallets on the sixth conveyor line 15, and transport the pallets to designated places according to the coding marks to realize the classified storage of pallets. The storage area 18 contains a number of storage shelves.

[0033] In order to improve the space utilization rate in the factory, the storage area 18 is arranged on the side of the steel strand segment decomposition area away from the steel strand segment temporary storage area 4.

[0034] Example 3 In another typical embodiment of the present invention, a sorting method is proposed, which utilizes the steel strand sorting line in Example 2, as follows: The steel grabber 2 in the stockpiling area 1 grabs the steel strands in the stockpiling area 1 according to the set program and conveys them to the gantry shear 3 in the pre-processing area. The gantry shear 3 cuts the steel strands into segments, and the steel strand segments are conveyed to the designated transfer box in the steel strand segment temporary storage area 4 through the conveyor belt. The feeder 5 automatically transports the transfer box containing the steel strand segments in the steel strand segment temporary storage area 4 to the steel strand segment decomposition area according to the set program, and places the transfer box on the automatic flipping mechanism at the end of the first conveyor line 6. The automatic flipping mechanism automatically flips the transfer box, so that the steel strand segments in the transfer box are placed on the first conveyor line 6. After the flipping is completed, the automatic flipping mechanism automatically resets, and the feeder 5 puts the empty transfer box back to the steel strand segment temporary storage area 4; The first conveyor line 6 conveys the steel strand segments to the shredder 7, which shreds the steel strand segments and discharges them to the second conveyor line 8. The second conveyor line 8 continuously vibrates the mixture on the second conveyor line 8 while conveying the mixture to the drum magnetic separator 9, so that the mixture is evenly distributed and non-sticky, so as to help improve the effect and efficiency of sorting. The drum magnetic separator 9 sorts the input mixture, and the steel core is discharged to the third conveyor line 11 through the steel core discharge port. The mixture after the preliminary selection is mixed by the mixing drum. The mixed material outlet is discharged to the belt magnetic separator 10, and the mixed material is secondary sorted by the belt magnetic separator 10. The steel core is discharged to the fourth conveyor line 12 through the steel core outlet, and is conveyed to the third conveyor line 11 through the fourth conveyor line 12, and then the steel core is conveyed to the tray at the steel core buffer area through the third conveyor line 11 to realize the collection, storage and buffering of the steel core. The aluminum core is discharged to the fifth conveyor line 13 through the aluminum core outlet, and then the aluminum core is conveyed to the tray at the aluminum core buffer area through the fifth conveyor line 13; The automatic conveying mechanism at the pallet buffer area 14 automatically conveys the pallet to the sixth conveyor line 15, and the pallet with steel core / aluminum core is conveyed to the storage area 18 through the sixth conveyor line 15. During the conveyance of the pallet, the overall coding machine 16 codes and marks the pallet on the sixth conveyor line 15, and the stacker 17 conveys the coded pallet on the sixth conveyor line 15 and transports the pallet to the designated place according to the coding mark to realize the classified storage of the pallet.

[0035] Through the above operations, the steel strands can be decomposed, classified and stored, with a high overall degree of automation and low labor intensity. There is no need to melt the steel strands, which saves energy and avoids environmental pollution. At the same time, the metal recovery rate is high, and there will be no loss of oxides, etc. The classification of steel core and aluminum core is realized, avoiding the doping pollution between metals caused by smelting and ensuring the purity of the metal. The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A steel strand sorting system, comprising: The shredder (7) is characterized in that the feed port of the shredder (7) is connected to the first conveyor line (6), the discharge port of the shredder (7) is connected to the drum magnetic separator (9) through the second conveyor line (8), the steel core discharge port of the drum magnetic separator (9) is connected to the tray buffer area (14) through the third conveyor line (11), the mixed material discharge port of the drum magnetic separator (9) is connected to the belt magnetic separator (10), the steel core outlet of the belt magnetic separator (10) is connected to the third conveyor line (11) through the fourth conveyor line (12), and the aluminum core outlet of the belt magnetic separator (10) is connected to the tray buffer area (14) through the fifth conveyor line (13).

2. The steel strand sorting system according to claim 1, characterized in that: The first conveyor line (6) is a scale conveyor line, and the second conveyor line (8) is a vibration conveyor line.

3. A sorting line, characterized in that: include: Stockpiling area (1); A pre-treatment area for cutting the steel strands into sections; The steel strand segment temporary storage area (4) is connected to the pre-processing area via a conveyor belt, and a transfer box for accommodating the steel strand segment is placed in the steel strand segment temporary storage area (4); The steel strand segment decomposition area is connected to the steel strand segment temporary storage area (4) via a feeder (5), and is provided with the steel strand sorting system as claimed in claim 1, and is used for decomposing the steel strand segment into steel core and aluminum core and sorting them; The tray buffer area (14) is connected to the steel strand segment decomposition area through a classification conveyor line group and is used for classification buffering of the steel core and the aluminum core after sorting; The coding and transporting area is connected to the pallet buffer area (14) and the storage area (18) via a conveyor line.

4. The sorting line according to claim 3, characterized in that: The stockpiling area (1) and the pretreatment area are both arranged outside the factory area. A steel grabber (2) is provided in the stockpiling area (1), and the steel grabber (2) is an automatic robot. A gantry shear (3) is provided in the pretreatment area.

5. The sorting line according to claim 3, characterized in that: The steel strand segment decomposition area is located on one side of the steel strand segment temporary storage area (4).

6. The sorting line according to claim 3, characterized in that: An automatic turning mechanism is installed at one end of the first conveying line (6) away from the shredder (7).

7. The sorting line according to claim 3, characterized in that: The pallet buffer area (14) is divided into a steel core buffer area and an aluminum core buffer area. The pallet buffer area (14) is connected to the storage area (18) via a sixth conveyor line (15). An automatic transport mechanism is provided at the pallet buffer area (14).

8. The sorting line according to claim 7, characterized in that: The coding and transporting area includes a sorting and coding machine (16) and a stacker (17). The overall coding machine is arranged on the sixth conveyor line (15), and the stacker (17) is located near the storage area (18).

9. A sorting method, characterized in that: The sorting line according to any one of claims 3 to 8 is used, specifically as follows: The steel grabber (2) grabs the steel strands in the stockpiling area (1) and takes them to the pre-processing area for segmentation. The steel strand segments are conveyed to the steel strand segment temporary storage area (4) via a conveyor belt. The feeder (5) transports the transfer box containing the steel strand segments to the steel strand segment decomposition area for decomposition and sorting, and caches the sorted steel core and aluminum core in a designated tray at the tray buffer area (14); The pallet with the steel core / aluminum core is transported to the storage area (18) via the sixth conveyor line (15). During the transportation of the pallet, the integral coding machine codes the pallet, and the stacker (17) moves the coded pallet to a designated place for storage.

10. The sorting method according to claim 9, characterized in that: The decomposition and sorting process of steel core and aluminum core is as follows: The transfer box is placed on the automatic flipping mechanism, which flips the steel strand segments in the transfer box onto the first conveyor line (6). After the flipping is completed, the transfer box is reset, and the feeder (5) re-places the empty transfer box into the steel strand segment temporary storage area (4); The first conveyor line (6) conveys the steel strand segments to the shredder (7), and the shredded mixed material is conveyed to the drum magnetic separator (9) for sorting through the second conveyor line (8). The mixed material after the primary sorting is discharged to the belt magnetic separator (10) for secondary sorting. The steel cores after the primary and secondary sorting are conveyed to the tray at the steel core buffer area through the conveyor line, and the aluminum cores are conveyed to the tray at the aluminum core buffer area through the conveyor line.

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