Portable neodymium-iron-boron magnet waste demagnetizing equipment

Abstract

The invention belongs to the technical field of rare earth permanent magnet material processing, and particularly relates to portable neodymium-iron-boron magnet waste demagnetizing equipment which comprises an obliquely-arranged heating furnace and a screen structure, the heating furnace comprises a front furnace body, a rotating furnace body and a rear furnace body, and the rotating furnace body is rotationally connected between the front furnace body and the rear furnace body; the rotary furnace body comprises a front cavity, a plurality of connecting rods and a rear cavity, the connecting rods are annularly arranged between the front cavity and the rear cavity, the screen structure comprises a screen assembly and a sliding assembly, the sliding assembly is arranged between the front cavity and the rear cavity, and the screen assembly is slidably connected to the sliding assembly. The screen structure specially made of triangular ribs is adopted, so that the neodymium iron boron magnet waste can be effectively prevented from being blocked in the rotating demagnetization process, the risk that due to blockage, part of waste is heated too long, oxidation is caused, and the quality problem is caused is reduced, and the demagnetization effect and the production continuity are improved; and meanwhile, a sliding assembly is arranged in the screen structure, so that the screen assembly is conveniently taken out of the heating furnace and replaced, and the working efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of rare earth permanent magnet material processing, and in particular relates to a convenient demagnetization device for NdFeB magnet waste. Background Art

[0002] During the recycling process of NdFeB magnet waste, a heating furnace is needed to heat the NdFeB magnet waste so that it can complete the demagnetization operation under high temperature conditions.

[0003] The patent with the announcement number CN119092250A is entitled "An automatic recycling device for NdFeB magnet waste", which discloses a fixed frame, a heating cylinder, a first cylinder cover, a second cylinder cover, a high-temperature imaging device, a feed pipe, a push rod, a push block, a first rotating assembly, a composite iron slideway, a second rotating assembly and a mesh cylinder assembly; a heating cylinder is fixedly connected to the fixed frame, and the heating cylinder is composed of an insulating cylinder body and a heater for controlling the temperature rise inside the insulating cylinder body; the first cylinder cover and the second cylinder cover are fixedly connected to the heating cylinder in sequence by bolts; a feed pipe is fixedly connected to the fixed frame; the feed pipe passes through the first cylinder body. The heating tube has a cover, and the first tube cover is fixedly connected to the feeding tube; a push block is inserted in the feeding tube; a push rod is fixedly connected to the push block; a first rotating assembly is connected in the heating tube; a plurality of composite iron slideways are equidistantly connected around the first rotating assembly, and the heating tube has the following technical features: a first rotating assembly and a second rotating assembly with different inclinations are arranged in the heating tube, and the first rotating assembly and the second rotating assembly respectively drive the composite iron slideway and the net tube assembly to rotate, and the magnet waste that has completed the preliminary demagnetization treatment in the composite iron slideway will automatically separate from the net tube assembly for complete demagnetization treatment, and the like;

[0004] However, the defects of the above-mentioned prior art documents are that the mesh tube assembly adopts a mesh tube structure formed by weaving conventional steel bar materials, and such a mesh tube structure is prone to mesh blockage during the demagnetization process of NdFeB magnet scrap, thereby causing the risk of oxidation caused by excessive heating of some scraps, leading to quality problems; and the mesh tube structure is easily damaged during the high-temperature heating demagnetization process, and the prior art documents also do not meet the demand for convenient replacement of the mesh tube structure. Therefore, based on the above-mentioned defects, the applicant has proposed a better technical solution to solve the above-mentioned technical problems.

[0005] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0006] The present invention aims to solve the above-mentioned technical problems and provides a convenient demagnetization equipment for NdFeB magnet waste. The main problem is that the mesh tube assembly in the prior art uses a mesh tube structure woven from conventional steel bar materials, and such a mesh tube structure is prone to mesh blockage during the demagnetization process of NdFeB magnet waste, thereby causing the risk of oxidation caused by heating some waste materials for too long, leading to quality problems; and the mesh tube structure is easily damaged during the high-temperature heating demagnetization process. The prior art documents also do not meet the technical problem of the need for convenient replacement of the mesh tube structure.

[0007] To achieve the above object, the technical solution of the present invention is:

[0008] A portable NdFeB magnet waste demagnetization device comprises an inclined heating furnace and a screen structure, wherein the heating furnace comprises a front furnace body, a rotating furnace body and a rear furnace body, wherein the rotating furnace body is rotatably connected between the front furnace body and the rear furnace body, wherein the rotating furnace body comprises a front cavity, a plurality of connecting rods and a rear cavity, wherein the plurality of connecting rods are arranged in a ring between the front cavity and the rear cavity,

[0009] The screen structure comprises a screen assembly and a sliding assembly, wherein the sliding assembly is arranged between the front cavity and the rear cavity, and the screen assembly is slidably connected to the sliding assembly.

[0010] The screen assembly includes two circular rings, a plurality of triangular ribs, a sliding sheet, a plurality of annular ribs and a bottom net. The plurality of triangular ribs are arranged between the inner walls of the two circular rings to form a screening chamber, and their tips are arranged outward. The sliding sheet is connected between the outer end surfaces of the two circular rings, and the sliding sheet is slidably connected to the sliding assembly. The plurality of annular ribs are arranged at intervals in the screening chamber, and the bottom net is arranged at the bottom of one of the circular rings located on the inner side.

[0011] Preferably, the sliding assembly includes a sliding rail and a driving member, the sliding rail is arranged between the front cavity and the rear cavity, a sliding groove is opened in the sliding rail, the sliding sheet is slidably arranged in the sliding groove, the sliding sheet is provided with a rack, and the driving member is arranged on the sliding rail and meshingly connected with the rack.

[0012] Preferably, the driving member 1 includes a motor 1 and a gear 1, the motor 1 is arranged on the slide rail, and its output end is connected to the gear 1, a receiving hole is opened on the slide rail, the gear 1 is arranged in the receiving hole and meshingly connected with the rack.

[0013] Preferably, a retaining ring is provided on the slide rail outside the bottom cover net.

[0014] Preferably, an outer shell is provided between the front furnace body and the rear furnace body, and a heating mechanism is provided on the outer shell. The heating mechanism comprises a pipe and a plurality of heating spray guns. The plurality of heating spray guns are arranged on the pipe at intervals, and the heating ends thereof pass through the outer shell and point to the screen structure. The pipe is connected to an external heating source.

[0015] Preferably, a discharge port is provided at the bottom of the outer shell, a discharge port is provided with a discharge chamber, a partition net is provided in the discharge chamber, a vibrator is provided on the partition net, a discharge channel is provided on the discharge chamber at the lower end of the partition net, and the discharge channel is connected to an external collecting box.

[0016] Preferably, a rust powder recovery box is provided at the lower end of the unloading chamber, and a dust extraction port is provided on the rust powder recovery box, and the dust extraction port is connected to an external dust extraction device.

[0017] Preferably, retaining rings 2 are provided on both sides of the discharge port in the outer shell.

[0018] Preferably, the present invention also includes two driving members 2, which are respectively arranged on the front furnace body and the rear furnace body, and the driving member 2 includes a motor 2 and a gear 2 connected to the output end of the motor 2. Gear rings are provided on the outer walls of the front cavity and the rear cavity, and the gear rings are meshed and connected with the gear 2.

[0019] Preferably, a cover body is detachably connected to the front furnace body, and a feed port is provided on the cover body.

[0020] Due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0021] 1. The present invention provides a convenient demagnetization device for NdFeB magnet waste, which has a simple structure and is easy to use. A special screen structure made of triangular ribs can effectively prevent NdFeB magnet waste from being blocked during the rotational demagnetization process, thereby reducing the risk of quality problems caused by oxidation due to excessive heating of part of the waste due to blockage, thereby improving the demagnetization effect and production continuity. At the same time, a sliding component is arranged in the screen structure, which facilitates the removal of the screen component from the heating furnace and its convenient replacement, thereby improving work efficiency.

[0022] 2. The sliding assembly in the present invention is provided with a driving member, which utilizes the meshing mode to cooperate with the rack on the sliding plate to facilitate driving the screen assembly to slide in the slide rail. The operation is convenient and reliable, and the disassembly of the screen assembly is convenient. At the same time, the driving member also has the function of limiting and fixing the screen assembly, preventing equipment failure due to loosening during the rotation of the screen assembly, thereby improving the rationality of the equipment design. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A top view of the present invention;

[0024] Figure 2 It is a front view of the present invention;

[0025] Figure 3 It is a structural schematic diagram of the screen assembly of the present invention;

[0026] Figure 4 A plan view of the screen structure of the present invention;

[0027] Figure 5 A flattened schematic diagram of the invented screen assembly;

[0028] Figure 6 for Figure 1 A magnified schematic diagram of point A;

[0029] Figure 7 for Figure 6 An enlarged schematic diagram of point B;

[0030] Figure 8 for Figure 1 Enlarged schematic diagram of point C.

[0031] The main component symbols in the figure are explained as follows:

[0032] 1. Heating furnace; 11. Front furnace body; 12. Rotating furnace body; 121. Front cavity; 122. Connecting rod; 123. Rear cavity; 13. Rear furnace body; 2. Screen structure; 21. Screen assembly; 211. Circular ring; 212. Triangular ribs; 213. Sliding sheet; 2131. Rack; 214. Annular ribs; 215. Bottom cover; 22. Sliding assembly; 221. Slide rail; 2211. Slide trough; 222. Driving member 1; 2221. Motor 1 ;2222, gear one; 3, retaining ring one; 4, outer shell; 41, discharge port; 5, heating mechanism; 51, pipeline; 52, heating spray gun; 6, discharge chamber; 7, rust powder recovery box; 71, dust extraction port; 8, retaining ring two; 9, driving part two; 91, motor two; 92, gear two; 100, accommodating hole; 200, vibrator; 300, discharge channel; 400, gear ring; 500, cover body; 600, feed port; 700, partition net. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Example

[0035] like Figures 1 to 8As shown, a portable NdFeB magnet scrap demagnetization device includes an inclined heating furnace 1 and a screen structure 2, the heating furnace 1 includes a front furnace body 11, a rotating furnace body 12 and a rear furnace body 13, the rotating furnace body 12 is rotatably connected between the front furnace body 11 and the rear furnace body 13, the rotating furnace body 12 includes a front cavity 121, a plurality of connecting rods 122 and a rear cavity 123, the plurality of connecting rods 122 are ring-arranged between the front cavity 121 and the rear cavity 123, the screen structure 2 includes a screen assembly 21 and a sliding assembly 22, the sliding assembly 22 is arranged between the front cavity 121 and the rear cavity 123, and the screen assembly 21 is slidably connected to the sliding assembly 22.

[0036] See also Figure 3 The screen assembly 21 includes two circular rings 211, a plurality of triangular ribs 212, a sliding sheet 213, a plurality of annular ribs 214 and a bottom net 215. The plurality of triangular ribs 212 are arranged between the inner walls of the two circular rings 211 to form a screening chamber, and the tips thereof are arranged outward. A sliding sheet 213 is connected between the outer end surfaces of the two circular rings 211. The sliding sheet 213 is slidably connected to the sliding assembly 22. The plurality of annular ribs 214 are arranged in intervals in the screening chamber. The bottom net 215 is arranged on a circular ring located on the inner side. The bottom of the ring 211; the specific sliding sheets 213 are arranged in four pieces and arranged in a circular array to facilitate a more balanced effect; each component in the screen assembly 21 is made of high-temperature resistant materials, such as 304 stainless steel; the tip of the triangular rib 212 is arranged outward, so that in the diameter direction of the screening chamber, the distance between two adjacent triangular ribs 212 is arranged from small to large, so that after the NdFeB magnet waste is demagnetized, it can fall from this distance to the outside of the screening chamber to avoid blockage in the screening chamber.

[0037] The present invention adopts a special screen structure composed of triangular ribs 212 to effectively prevent NdFeB magnet waste from being blocked during the rotational demagnetization process, reduce the risk of quality problems caused by oxidation due to excessive heating of some waste due to blockage, and improve the demagnetization effect and production continuity; at the same time, a sliding component 22 is provided in the screen structure 2, which facilitates the removal of the screen component 21 from the heating furnace 1 and its convenient replacement, thereby improving work efficiency; and the provision of the annular ribs 214 can separate the screening chamber into multiple sections, which can prevent a large amount of NdFeB magnet waste from sliding to the bottom of the screening chamber in a piled state during the rotational demagnetization process, thereby reducing the demagnetization effect.

[0038] In this embodiment, please refer to Figure 4 and Figure 7The sliding assembly 22 includes a slide rail 221 and a driving member 222. The slide rail 221 is arranged between the front cavity 121 and the rear cavity 123. A slide groove 2211 is opened in the slide rail 221. The sliding sheet 213 is slidably arranged in the slide groove 2211. The sliding sheet 213 is provided with a rack 2131. The driving member 222 is arranged on the slide rail 221 and meshed with the rack 2131. The sliding assembly 22 in the present invention is provided with a driving member 222, which is engaged with the rack 2131 on the sliding sheet 213 to facilitate driving the screen assembly 21 to slide in the slide rail 221 with the help of the sliding sheet 213. The operation is convenient and reliable, and the disassembly operation of the screen assembly 21 is convenient. At the same time, the driving member 222 plays a role in limiting and fixing the screen assembly 21, preventing the screen assembly 21 from loosening during rotation and causing equipment failure, thereby improving the rationality of equipment design.

[0039] There are multiple driving members 222 arranged along the slide rail 221 to facilitate better driving of the screen assembly 21 to slide; at the same time, in order to protect the driving member 1 from being affected by high temperature, a cover (not shown in the figure) is provided on the slide rail 221.

[0040] Specifically, the driving member 222 includes a motor 2221 and a gear 2222. The motor 2221 is arranged on the slide rail 221, and its output end is connected to the gear 2222. The slide rail 221 is provided with a receiving hole 100. The gear 2222 is arranged in the receiving hole 100 and meshed with the rack 2131. During the specific operation, the spacing between two adjacent triangular ribs 212 in the screen assembly 21 is set to a, and the value a is greater than the size of the NdFeB magnet waste material to be demagnetized. Then, the sliding piece 213 is slid in the slide rail 221. And through the meshing relationship between gear 1 2222 and rack 2131, the screen assembly 21 is driven by motor 1 2221 to gradually slide into the lower part of the heating furnace 1, and then the braking motor 2221 can limit and fix the screen assembly 21 again through the meshing relationship between gear 1 2222 and rack 2131; but when the screen assembly 21 needs to be replaced and taken out, the motor 1 2221 is operated in reverse to slide the screen assembly 21 out; the value of a is determined by the size of the NdFeB magnet waste to ensure that the NdFeB magnet waste can fall to the outside of the screen assembly 21 after demagnetization.

[0041] See also Figure 8 A retaining ring 3 is provided on the slide rail 221 outside the bottom cover net 215 ; the retaining ring 3 serves as a limit for the screen assembly 21 .

[0042] In this embodiment, please refer to Figure 1 and Figure 2An outer shell 4 is provided between the front furnace body 11 and the rear furnace body 13, and a heating mechanism 5 is provided on the outer shell 4. The heating mechanism 5 includes a pipeline 51 and a plurality of heating spray guns 52. The plurality of heating spray guns 52 are arranged on the pipeline 51 at intervals, and the heating ends thereof pass through the outer shell 4 and point to the screen structure 2. The pipeline 51 is connected to an external heating source. In the specific setting, two heating mechanisms 5 are provided, and the two are respectively provided on the front and rear sides of the heating furnace 1 to ensure the demagnetization effect.

[0043] Specifically, a discharge port 41 is provided at the bottom of the outer shell 4, and a discharge chamber 6 is provided at the discharge port 41. A partition net 700 is provided in the discharge chamber 6, and a vibrator 200 is provided on the partition net 700. A discharge channel 300 is provided on the discharge chamber 6 at the lower end of the partition net 700, and the discharge channel 300 is connected to an external collection box; a rust powder recovery box 7 is provided at the lower end of the discharge chamber 6, and a dust extraction port 71 is provided on the rust powder recovery box 7, and the dust extraction port 71 is connected to an external dust extraction device; Figure 2 As shown, after the NdFeB magnet waste is demagnetized, it loses its magnetism and falls from the screen assembly 21 to the discharge port 41 and then falls onto the partition 700. Under the vibration of the exciter 200, impurities such as rust powder on the surface of the NdFeB magnet waste can be removed. The impurities fall into the rust powder recovery box 7 through the partition 700, and the NdFeB magnet waste is introduced into the discharge channel 300 by the inclined partition 700 to complete the separation of the two.

[0044] Specifically, a retaining ring 8 is provided on both sides of the discharge port 41 in the outer shell 4; the retaining ring 8 prevents the NdFeB magnet waste from falling into other areas of the outer shell 4, so that the NdFeB magnet waste can only fall into the discharge chamber 6 from the discharge port 41, avoiding incomplete recovery.

[0045] In addition, an exhaust gas recovery port (not shown in the figure) is provided on the outer shell 4, and the exhaust gas recovery port is connected to an external recovery source to facilitate the exhaust gas generated during the high-temperature heating process to be discharged for centralized treatment and protect the production environment from pollution.

[0046] In this embodiment, please refer to Figure 6 The present invention also includes two driving members 29, which are respectively arranged on the front furnace body 11 and the rear furnace body 13. The driving member 29 includes a motor 291 and a gear 292 connected to the output end of the motor 291. The outer walls of the front cavity 121 and the rear cavity 123 are both provided with a gear ring 400, and the gear ring 400 is meshed and connected with the gear 2 62; the driving member 29 can be used as a power source for rotating the furnace body 12.

[0047] In this embodiment, please refer to Figure 1 The front furnace body 11 is detachably connected with a cover body 500, and a feed port 600 is provided on the cover body 500; the detachable connection of the cover body 500 facilitates opening of the front furnace body 11, thereby facilitating the disassembly operation of the screen assembly 21.

[0048] The present invention also includes an electrical control system, in which the electrical components involved, such as motor 1 2221, heating spray gun 52 and motor 2 91, are all electrically connected to it, and the connection relationship is set by conventional technical means, which will not be elaborated here.

[0049] Working principle of the present invention:

[0050] The present invention provides a convenient demagnetization device for NdFeB magnet waste. When it is used, a suitable screen assembly 21 is selected according to the size of the NdFeB magnet waste to be demagnetized, and then the screen assembly 21 is slid in the slide rail 221 through the sliding sheet 213 and meshed with the gear 2222 and the rack 2131. The screen assembly 21 is driven by the motor 2221 to gradually slide into the lower part of the heating furnace 1, and then the brake motor 2221 can again limit and fix the screen assembly 21 through the meshing relationship between the gear 2222 and the rack 2131;

[0051] The cover body 500 is closed and the NdFeB magnet waste is introduced into the screen assembly 21 from the feed port 600. The driving member 29 drives the rotating furnace body 12 to rotate, thereby driving the screen assembly 21 to rotate. During the rotation of the screen assembly 21, the NdFeB magnet waste in it is heated at high temperature by the heating mechanism 5 to perform demagnetization treatment.

[0052] After losing its magnetism, the NdFeB magnet waste will fall from the screen assembly 21 to the discharge port 41 and then fall onto the partition 700. Under the vibration of the exciter 200, impurities such as rust powder on the surface of the NdFeB magnet waste can be removed. The impurities fall into the rust powder recovery box 7 through the partition 700, while the NdFeB magnet waste is introduced into the discharge channel 300 by the inclined partition 700 to complete the separation of the two.

[0053] When the screen assembly 21 needs to be replaced, the closed cover 500 is opened, and the motor 2221 is operated in reverse to slide the screen assembly 21 out of the heating furnace 1; the present invention adopts a special screen structure 2 composed of triangular ribs 212 to effectively prevent NdFeB magnet waste from being blocked therein during the rotational demagnetization process, thereby reducing the risk of quality problems caused by oxidation due to excessive heating of part of the waste due to blockage, and improving the demagnetization effect and production continuity; at the same time, a sliding assembly 22 is provided in the screen structure 2, which facilitates the removal of the screen assembly 21 from the heating furnace 1 and its convenient replacement, thereby improving work efficiency.

[0054] The above description is a detailed description of the preferred feasible embodiments of the present invention, but the embodiments are not intended to limit the scope of the patent application of the present invention. All equivalent changes or modified changes completed under the technical spirit suggested by the present invention should fall within the patent scope covered by the present invention.

Claims

1. A portable NdFeB magnet waste demagnetization device, characterized in that: The invention comprises a heating furnace (1) and a screen structure (2) arranged obliquely, wherein the heating furnace (1) comprises a front furnace body (11), a rotating furnace body (12) and a rear furnace body (13), wherein the rotating furnace body (12) is rotatably connected between the front furnace body (11) and the rear furnace body (13), wherein the rotating furnace body (12) comprises a front cavity (121), a plurality of connecting rods (122) and a rear cavity (123), wherein the plurality of connecting rods (122) are arranged in a ring between the front cavity (121) and the rear cavity (123), The screen structure (2) comprises a screen assembly (21) and a sliding assembly (22), wherein the sliding assembly (22) is arranged between the front cavity (121) and the rear cavity (123), and the screen assembly (21) is slidably connected to the sliding assembly (22). The screen assembly (21) comprises two circular rings (211), a plurality of triangular ribs (212), a sliding sheet (213), a plurality of annular ribs (214) and a bottom cover net (215). The plurality of triangular ribs (212) are arranged between the inner walls of the two circular rings (211) to form a screening chamber, and the tips of the triangular ribs are arranged outward. The sliding sheet (213) is connected between the outer end surfaces of the two circular rings (211). The sliding sheet (213) is slidably connected to the sliding assembly (22). The plurality of annular ribs (214) are arranged at intervals in the screening chamber. The bottom cover net (215) is arranged at the bottom of one of the circular rings (211) located on the inner side.

2. A portable NdFeB magnet waste demagnetization device as claimed in claim 1, characterized in that: The sliding assembly (22) comprises a sliding rail (221) and a driving member (222); the sliding rail (221) is arranged between the front cavity (121) and the rear cavity (123); a sliding groove (2211) is provided in the sliding rail (221); the sliding sheet (213) is slidably arranged in the sliding groove (2211); a rack (2131) is provided on the sliding sheet (213); and the driving member (222) is arranged on the sliding rail (221) and meshedly connected with the rack (2131).

3. A portable NdFeB magnet waste demagnetization device as claimed in claim 2, characterized in that: The driving member 1 (222) comprises a motor 1 (2221) and a gear 1 (2222); the motor 1 (2221) is arranged on the slide rail (221), and its output end is connected to the gear 1 (2222); a receiving hole (100) is provided on the slide rail (221); the gear 1 (2222) is arranged in the receiving hole (100) and meshes with the rack (2131).

4. A portable NdFeB magnet waste demagnetization device as claimed in claim 2, characterized in that: A retaining ring member (3) is provided on the slide rail (221) outside the bottom cover net (215).

5. A portable NdFeB magnet waste demagnetization device as claimed in claim 1, characterized in that: An outer shell (4) is provided between the front furnace body (11) and the rear furnace body (13); a heating mechanism (5) is provided on the outer shell (4); the heating mechanism (5) comprises a pipeline (51) and a plurality of heating spray guns (52); the plurality of heating spray guns (52) are arranged on the pipeline (51) at intervals, and the heating ends thereof pass through the outer shell (4) and point toward the screen structure (2); the pipeline (51) is connected to an external heating source.

6. A portable NdFeB magnet waste demagnetization device as claimed in claim 5, characterized in that: The outer shell (4) is provided with a discharge port (41) at the bottom, the discharge port (41) is provided with a discharge chamber (6), a partition net (700) is provided in the discharge chamber (6), an exciter (200) is provided on the partition net (700), a discharge channel (300) is provided on the discharge chamber (6) at the lower end of the partition net (700), and the discharge channel (300) is connected to an external collection box.

7. A portable NdFeB magnet waste demagnetization device as claimed in claim 6, characterized in that: A rust powder recovery box (7) is provided at the lower end of the discharge chamber (6), and a dust extraction port (71) is provided on the rust powder recovery box (7), and the dust extraction port (71) is connected to an external dust extraction device.

8. A portable NdFeB magnet waste demagnetization device as claimed in claim 6, characterized in that: Two retaining rings (8) are provided in the outer shell (4) on both sides of the discharge port (41).

9. A portable NdFeB magnet waste demagnetization device as claimed in claim 1, characterized in that: It also includes two driving members (9), which are respectively arranged on the front furnace body (11) and the rear furnace body (13), and the driving member (9) includes a motor (91) and a gear (92) connected to the output end of the motor (91). The outer walls of the front cavity (121) and the rear cavity (123) are both provided with a gear ring (400), and the gear ring (400) is meshed with the gear (92).

10. A portable NdFeB magnet waste demagnetization device as claimed in claim 1, characterized in that: The front furnace body (11) is detachably connected to a cover body (500), and the cover body (500) is provided with a feed port (600).

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