A method for separating nonferrous metals using eddy current

Abstract

The present invention provides an eddy current sorting method for non-ferrous metals, belonging to the technical field of non-ferrous metal sorting, comprising: a vibrating feeder, a mounting shell and an eddy current magnetic roller; a non-metallic slide is provided on one side of the mounting shell; the eddy current magnetic roller comprises a motor, a main shaft, a metal frame, a first magnet and a second magnet, the surface of the metal frame is provided with grooves and protrusions, and the first magnet and the second magnet are respectively installed in the grooves; the first magnet and the second magnet are respectively provided with a first mounting groove and a second mounting groove, and a third magnet and a fourth magnet are respectively installed in the first mounting groove and the second mounting groove; the method combines the vibrating feeder with the eddy current magnetic roller so that the material passing through the sorting area is a single-layer material, and by combining the first magnet, the second magnet, the third magnet and the fourth magnet, a high-efficiency eddy current sorting system with significantly enhanced magnetic field strength can be constructed, thereby further improving the separation effect between metal particles and non-metal particles.

Description

Technical Field

[0001] The invention belongs to the technical field of non-ferrous metal separation, and in particular relates to an eddy current separation method for non-ferrous metals. Background Art

[0002] In the patent application with application number 201910350705.9, a method for recycling aluminum electrolytic capacitor waste using a physical treatment method is proposed, which is characterized in that the aluminum electrolytic capacitor waste is crushed by a crushing mechanism; after crushing, the guide needles are separated by a magnetic separation mechanism; the waste after the guide needles are separated is separated from the metal aluminum by an eddy current separation mechanism; the waste after the metal aluminum is separated is separated from the rubber plug and paper by a separation mechanism; the recycling device is equipped with a crushing mechanism, a magnetic separation mechanism, an eddy current separation mechanism and a separation mechanism on the frame in sequence according to the waste conveying direction; a waste conveying mechanism including a conveying belt is arranged between the crushing mechanism and the magnetic separation mechanism, the magnetic separation mechanism and the eddy current separation mechanism, and the eddy current separation mechanism and the separation mechanism; the method has a simple device structure, uses a physical treatment method to separate the aluminum electrolytic capacitor waste into metal aluminum, guide needles, electrolytic paper and rubber plugs and recycles them, with low cost, high efficiency and good separation effect.

[0003] However, in the prior art, when a conveyor belt is used to transport materials to a sorting area, two or more layers of materials are easily formed in the sorting area, resulting in two phenomena. One is that the inner metal material is easily colliding with the outer material when it moves outward due to the repulsive force of the magnetic field, resulting in poor sorting effect. The other is that the metal particles in the outer layer are far away from the magnetic roller, and their own induced magnetic field is small. The repulsive force formed between the two magnetic fields is not enough to push the metal particles to change their motion trajectory, so the sorting operation cannot be completed. Summary of the invention

[0004] Based on the above technical problems, the present invention provides an eddy current sorting method for non-ferrous metals. The method combines a vibrating feeder with an eddy current magnetic roller to make the material passing through the sorting area a single-layer material, and by combining the first magnet, the second magnet, the third magnet and the fourth magnet, a high-efficiency eddy current sorting system with significantly enhanced magnetic field strength can be constructed, thereby further improving the separation effect between metal particles and non-metallic particles.

[0005] The specific technical solution is: A method for eddy current sorting of nonferrous metals, comprising: a vibrating feeder, a mounting shell and an eddy current magnetic roller; the vibrating feeder is fixed on the top of a bracket; the mounting shell is arranged on one side of the vibrating feeder, and a non-metal slide is arranged on one side of the mounting shell; the eddy current magnetic roller comprises a motor, a main shaft, a metal frame, a first magnet and a second magnet, the motor controls the rotation of the main shaft, and the two ends of the main shaft are respectively rotatably connected with the two ends of the mounting shell, the metal frame is arranged on the outer side of the main shaft, and a groove and a protrusion are arranged on the surface of the metal frame, and the first magnet and the second magnet are respectively installed in the groove; the first magnet and the second magnet are respectively provided with a first mounting groove and a second mounting groove, and a third magnet and a fourth magnet are respectively installed in the first mounting groove and the second mounting groove; wherein the sorting method is: after the mixed particle group is discharged from the discharge port of the vibrating feeder, the mixed particle group passes through the non After the metal slide reaches the sorting area where the eddy current magnetic roller is located, it is affected by the alternating magnetic field generated by the high-speed rotating eddy current magnetic roller. When the mixed particle group passes through the alternating magnetic field at a certain speed, induced eddy currents will be generated inside the metal particles in the mixed particle group. The eddy current will generate a magnetic field with the opposite poles to the alternating magnetic field, thereby causing the metal particles to generate a repulsive force. This repulsive force changes the movement trajectory of the metal particles. At the same time, the non-metallic particles in the material will not produce electromagnetic induction effect. Therefore, when the mixed particle group formed by metal particles and non-metallic particles passes through the alternating magnetic field, due to different forces, the trajectories formed by the metal particles and non-metallic particles are different, thereby effectively separating the metal particles and the non-metallic particles; and the magnetic force of the magnetic field can be enhanced by using the first magnet, the second magnet, the third magnet and the fourth magnet in combination.

[0006] In addition, the eddy current separation method for non-ferrous metals in the above technical solution provided by the present invention may also have the following additional technical features: In the above technical solution, the first magnet, the second magnet, the third magnet and the fourth magnet are all installed by means of screws and nuts, and a plurality of through holes are provided on the metal frame for the screws to pass through.

[0007] In the above technical solution, the eddy current magnetic roller is located at the tail of the non-metal slide, so that it forms a sorting area.

[0008] In the above technical solution, the vibrating feeder is controlled to vibrate up and down by using a vibrating motor and a shock-absorbing spring in combination.

[0009] In the above technical solution, a metal collection box and a non-metal collection box are respectively provided on one side of the installation shell, and a baffle with a predetermined inclination angle is provided between the metal collection box and the non-metal collection box to separate metal particles and non-metal particles.

[0010] In the above technical solution, magnetic poles are provided on both sides and outer arcs of the first magnet and the second magnet, the corresponding magnetic poles on both sides of the first magnet and the second magnet are opposite, and the magnetic poles of the third magnet and the fourth magnet are opposite to those of the first magnet and the second magnet respectively.

[0011] Compared with the prior art, the eddy current separation method for nonferrous metals of the present invention has the following beneficial effects: 1. By combining the vibrating feeder and the eddy current magnetic roller, the vibrating feeder is used to screen the mixed particle group, so that the material passing through the eddy current electromagnetic roller area is a single layer of material, and the eddy current electromagnetic roller is used to separate the metal particles and non-metallic particles in the mixed particle group, thereby improving the sorting accuracy and efficiency.

[0012] 2. By combining the first N-pole magnet, the second N-pole magnet, the first S-pole magnet and the second S-pole magnet, an efficient eddy current separation system with significantly enhanced magnetic field strength can be constructed, thereby further improving the separation effect between metal particles and non-metal particles. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A front view of an eddy current separation method for nonferrous metals according to the present invention; Figure 2 It is a front view of the metal skeleton of the present invention; Figure 3 is a cross-sectional view of the metal skeleton of the present invention; Figure 4 for Figure 3 A local enlarged view of point A; Figure 5 It is a structural schematic diagram of the installation shell of the present invention; in, Figures 1 to 5 The corresponding relationship between the reference numerals and component names in the figure is: 10 vibrating feeder, 11 bracket, 12 mounting shell, 13 non-metal slide, 14 motor, 15 spindle, 16 metal frame, 17 first magnet, 18 second magnet, 19 groove, 20 protrusion, 21 first mounting groove, 22 second mounting groove, 23 third magnet, 24 fourth magnet, 25 screw, 26 nut, 27 through hole, 28 guide plate, 29 metal collection box, 30 non-metal collection box, 31 baffle, 32 vibration motor, 33 shock-absorbing spring. DETAILED DESCRIPTION

[0014] The following is a combination of specific implementation cases and attached Figure 1-5 The present invention is further described below, but the present invention is not limited to these embodiments.

[0015] A method for separating nonferrous metals by eddy current, such as Figure 1-5As shown, it includes: a vibrating feeder 10, a mounting shell 12 and an eddy current magnetic roller; the vibrating feeder 10 is fixed on the top of the bracket 11; the mounting shell 12 is arranged on one side of the vibrating feeder 10, and a non-metal slide plate 13 is arranged on one side of the mounting shell 12; the eddy current magnetic roller includes a motor 14, a main shaft 15, a metal skeleton 16, a first magnet 17 and a second magnet 18, the motor 14 controls the rotation of the main shaft 15, and the two ends of the main shaft 15 are respectively rotatably connected with the two ends of the mounting shell 12, the metal skeleton 16 is arranged on the outer side of the main shaft 15, and the surface of the metal skeleton 16 is provided with a groove 19 and a protrusion 20, and the first magnet 17 and the second magnet 18 are respectively installed in the groove 19; the first magnet 17 and the second magnet 18 are respectively provided with a first mounting groove 21 and a second mounting groove 22, and the first mounting groove 21 and the second mounting groove 22 are respectively installed with a third magnet 23 and a fourth magnet 24; wherein the sorting method is: mixed particle group After being discharged from the discharge port of the vibrating feeder 10, the mixed particle group passes through the non-metallic slide 13 and reaches the sorting area where the eddy current magnetic roller is located. It is affected by the alternating magnetic field generated by the high-speed rotating eddy current magnetic roller. When the mixed particle group passes through the alternating magnetic field at a certain speed, induced eddy currents will be generated inside the metal particles in the mixed particle group. The eddy currents will generate a magnetic field with opposite poles to the alternating magnetic field, thereby causing the metal particles to generate a repulsive force. This repulsive force changes the movement trajectory of the metal particles. At the same time, the non-metallic particles in the material will not generate electromagnetic induction effect. Therefore, when the mixed particle group formed by metal particles and non-metallic particles passes through the alternating magnetic field, due to different forces, the trajectories formed by the metal particles and non-metallic particles are different, thereby effectively separating the metal particles and non-metallic particles; and the magnetic force of the magnetic field can be enhanced by the combined use of the first magnet 17, the second magnet 18, the third magnet 23 and the fourth magnet 24.

[0016] By adopting the above method, a vibrating feeder 10 and an eddy current magnetic roller are used in combination, and the vibrating feeder 10 is used to screen the mixed particle group, so that the material passing through the eddy current electromagnetic roller area is a single-layer material, and the metal particles and non-metallic particles in the mixed particle group are separated by the eddy current electromagnetic roller, thereby improving the sorting accuracy and efficiency; by using the first magnet 17, the second magnet 18, the third magnet 23 and the fourth magnet 24 in combination, an efficient eddy current sorting system with significantly enhanced magnetic field strength can be constructed, thereby further improving the separation effect between metal particles and non-metallic particles.

[0017] Specifically, by setting a mounting groove on the first magnet 17 and the second magnet 18, and additionally installing the third magnet 23 and the fourth magnet 24 in the mounting groove, the original magnetic field strength can be enhanced. Specifically, the arrangement of the first magnet 17 and the second magnet 18 is SN or NS, the arrangement of the third magnet 23 and the first magnet 17 is NS or SN, and the arrangement of the fourth magnet 24 and the second magnet 18 is NS or SN, thereby enhancing the strength of the magnetic field, which in turn helps to more effectively separate non-ferrous metal particles from non-metallic substances.

[0018] In the embodiment of the present invention, the first magnet 17 , the second magnet 18 , the third magnet 23 and the fourth magnet 24 are all installed by means of screws 25 and nuts 26 , and a plurality of through holes 27 are provided on the metal frame 16 for the screws 25 to pass through.

[0019] The first magnet 17 , the second magnet 18 , the third magnet 23 and the fourth magnet 24 are fixed by screws 25 and nuts 26 , so as to facilitate their removal or installation.

[0020] In the embodiment of the present invention, the eddy current magnetic roller is located at the tail of the non-metal slide 13 so as to form a sorting area.

[0021] In the embodiment of the present invention, the vibrating feeder 10 is controlled to vibrate up and down by using the vibrating motor 32 and the damping spring 33 in combination.

[0022] In the embodiment of the present invention, a guide plate 28 is provided at the discharge port of the vibrating feeder 10 , so that the mixed particle group discharged from the discharge port falls onto the non-metal slide plate 13 along the guide plate 28 .

[0023] In an embodiment of the present invention, a metal collection box 29 and a non-metal collection box 30 are respectively provided on one side of the mounting shell 12, and a baffle 31 with a predetermined inclination angle is provided between the metal collection box 29 and the non-metal collection box 30, so as to separate metal particles and non-metal particles.

[0024] In an embodiment of the present invention, magnetic poles are provided on both sides and the outer arc of the first magnet 17 and the second magnet 18, the magnetic poles corresponding to the two sides of the first magnet 17 and the second magnet 18 are opposite, and the magnetic poles of the third magnet 23 and the fourth magnet 24 are opposite to the magnetic poles of the first magnet 17 and the second magnet 18 respectively.

[0025] The present application adopts the Halbach array to install the first magnet 17 and the second magnet 18 in the groove 19 of the metal skeleton 16. Compared with the traditional linear arrangement, the Halbach array can achieve a stronger magnetic field in a smaller space, thereby improving the induction effect on metal particles, and further improving the separation accuracy between metal and non-metal particles.

[0026] In the description of the present invention, the term "plurality" refers to two or more than two. Unless otherwise clearly defined, the orientation or positional relationship indicated by the terms "upper" and "lower" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention. The terms "connection", "installation", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for separating nonferrous metals using eddy current, characterized in that: include: A vibrating feeder, wherein the vibrating feeder is fixed on the top of the bracket; A mounting shell, the mounting shell being arranged on one side of the vibrating feeder, and a non-metal slide plate being arranged on one side of the mounting shell; An eddy current magnetic roller, the eddy current magnetic roller comprising a motor, a main shaft, a metal frame, a first magnet and a second magnet, the motor controls the rotation of the main shaft, the two ends of the main shaft are respectively rotatably connected to the two ends of the mounting shell, the metal frame is arranged on the outside of the main shaft, the surface of the metal frame is provided with a groove and a protrusion, the first magnet and the second magnet are respectively installed at the groove and the protrusion of the metal frame; The outer walls of the first magnet and the second magnet are respectively provided with a first mounting groove and a second mounting groove, and the third magnet and the fourth magnet are respectively installed in the first mounting groove and the second mounting groove; Among them, the sorting method is: after the mixed particle group is discharged from the discharge port of the vibrating feeder, the mixed particle group passes through the non-metallic slide plate to reach the sorting area where the eddy current magnetic roller is located. Due to different forces, the trajectories formed by the metal particles and the non-metallic particles are different, thereby effectively separating the metal particles and the non-metallic particles; and the magnetic force of the magnetic field can be further enhanced by combining the first magnet, the second magnet, the third magnet and the fourth magnet.

2. The eddy current separation method for nonferrous metals according to claim 1, characterized in that: The first magnet, the second magnet, the third magnet and the fourth magnet are all installed by means of screws and nuts, and a plurality of through holes are provided on the metal frame so as to allow the screws to pass through.

3. The eddy current separation method for nonferrous metals according to claim 1, characterized in that: The eddy current magnetic roller is located at the tail of the non-metal slide, so that it forms a sorting area.

4. The eddy current separation method for nonferrous metals according to claim 1, characterized in that: The vibrating feeder is controlled to vibrate up and down by using a vibrating motor and a shock absorbing spring in combination.

5. The eddy current separation method for nonferrous metals according to claim 1, characterized in that: A guide plate is provided at the discharge port of the vibrating feeder, so that the mixed particle group discharged from the discharge port falls onto the non-metal slide along the guide plate.

6. The eddy current separation method for nonferrous metals according to claim 1, characterized in that: A metal collection box and a non-metal collection box are respectively arranged on one side of the installation shell, and a baffle with a predetermined inclination angle is arranged between the metal collection box and the non-metal collection box, so as to separate metal particles and non-metal particles.

7. The eddy current separation method for nonferrous metals according to claim 1, characterized in that: The first magnet and the second magnet are provided with magnetic poles on both sides and the outer arc, the magnetic poles corresponding to the two sides of the first magnet and the second magnet are opposite, and the magnetic poles of the third magnet and the fourth magnet are opposite to the magnetic poles of the first magnet and the second magnet respectively.

Images