A microwave tunnel furnace for recycling waste lithium batteries

Abstract

The invention discloses a microwave tunnel furnace for recycling waste lithium batteries, comprising a conveyor belt, a microwave oven body, a microwave heating system, a dehumidification fan, and also comprising: an adjustable opening structure, a feeding port is provided on a side of the microwave oven body close to the battery debris feeding, the adjustable opening structure comprises a fixed part arranged on the inner side of the feeding port, a movable part is movably connected to the lower end of the fixed part, the movable part is electrically connected to a power switch of the dehumidification fan, a forming end is arranged at one end of the movable part away from the fixed part, the bottom end of the forming end is fitted on the limiting seats at both ends of the conveyor belt, a pre-dispersion structure is arranged on a side of the microwave oven body close to the battery debris feeding, comprises a telescopic part fixedly connected to the top of the microwave oven body, a crushing assembly is connected below the telescopic part, and a return material guide assembly is arranged on the inner wall of the microwave oven body. The invention can efficiently dry the battery debris.

Description

Technical Field

[0001] The invention relates to a microwave tunnel furnace, in particular to a microwave tunnel furnace for recycling waste lithium batteries. Background Art

[0002] Improper disposal of retired power batteries poses certain safety hazards. Even if the batteries are no longer in use, they still need to be recycled and reused. During the recycling process, the used batteries are first pre-processed at the factory, then disassembled into different parts, and then the different parts are processed for recycling or repair. Among them, the recycling and reuse of broken battery fragments is also a higher-priced part of recycled batteries.

[0003] When traditionally processing battery debris, it is generally heated in a microwave tunnel furnace, and the battery fragments are dried in a relatively closed environment such as a microwave tunnel furnace. However, the battery fragments will generate moisture during drying, and the moisture needs to be discharged. Existing equipment can play a certain role in dissipating water vapor by installing an exhaust fan on the top of the furnace body and enlarging the openings at both ends of the feed and discharge. However, if the openings at both ends of the feed are enlarged, although moisture can be discharged from the feed position, heat will also be discharged. In addition, if the exhaust fan installed on the top of the furnace body has too much suction force, part of the battery debris will be taken away. If the suction force is too small, the water vapor will easily sink to the bottom, making it difficult to achieve efficient drying effects.

[0004] Therefore, this case aims to provide a microwave tunnel furnace for recycling waste lithium batteries, which can not only efficiently dry the battery debris, but also retain most of the heat inside the furnace body, saving more than 30% of fuel. Summary of the invention

[0005] The present invention provides a microwave tunnel furnace for recycling waste lithium batteries, which can effectively solve the above problems.

[0006] The present invention is achieved in that:

[0007] A microwave tunnel furnace for recycling waste lithium batteries, comprising a conveyor belt for conveying battery debris, a microwave oven body is sleeved above the conveyor belt, a microwave heating system is arranged inside the microwave oven body, a plurality of dehumidification fans are arranged on the top of the microwave oven body, and the microwave tunnel furnace also includes:

[0008] An adjustable opening structure, wherein a feeding port is provided on a side of the microwave oven body close to the feeding of battery debris, the adjustable opening structure comprises a fixed part arranged inside the feeding port, a movable part is movably connected to the lower end of the fixed part, the movable part is electrically connected to the power switch of the dehumidification fan, a forming end is provided at one end of the movable part away from the fixed part, the bottom end of the forming end is attached to the limit seats at both ends of the conveyor belt, and when the microwave heating system of the microwave oven body is started, the movable part extends downward and abuts part of the forming end against the conveyor belt;

[0009] The pre-dispersion structure is arranged on one side of the microwave oven body close to the battery debris feeding, and includes a telescopic part fixedly connected to the top of the microwave oven body, a crushing assembly is connected below the telescopic part, and a return material guide assembly is arranged on the inner wall of the microwave oven body. When the telescopic part is extended, the crushing assembly is pushed down, and the crushing assembly pushed down crushes the clumped battery debris on the conveyor belt, and when the crushing assembly is retracted, the battery debris on the bottom is scraped off through the return material guide assembly.

[0010] As a further improvement, the fixed part includes a concave mounting seat arranged on the inner side of the feed port, a plurality of cavities are arranged on the inner side of the concave mounting seat, and the movable part is movably mounted in the cavities.

[0011] As a further improvement, the movable portion comprises a movable member arranged in the tubular cavity, the outer side of the movable member is covered with a sealing surface, and the upper edge of the sealing surface is glued to the inner side wall of the concave mounting seat.

[0012] As a further improvement, the movable part is a non-powered bellows, or the movable part is a cylinder, and the power source of the cylinder is electrically connected to the power switch of the dehumidification fan.

[0013] As a further improvement, the forming end includes a sealing belt arranged at the bottom of the sealing surface, and two fixed anchor points are arranged at both ends of the inner side of the sealing belt. The two fixed anchor points are movably mounted on the limit seats at both ends of the conveyor belt, and the height between the sealing belt and the conveyor belt is changed when the sealing belt is pulled down or lifted up.

[0014] As a further improvement, the telescopic member comprises a hanging bracket fixedly connected to the inner wall of the microwave oven body, a push rod motor is hung on the hanging bracket, and the bottom of the push rod motor is connected to the grinding assembly.

[0015] As a further improvement, the grinding assembly includes a mounting buckle connected to the output end of the push rod motor, a plurality of mounting cavities are fixedly connected below the mounting buckle, grinding rods are inserted into the mounting cavities, and the grinding rods are elastically arranged.

[0016] As a further improvement, the return material guide assembly includes a guide plate parallel to the suspension frame, and a side limit plate is connected below the guide plate, and the side limit plate is fixed on the limit seats at both ends of the conveyor belt.

[0017] As a further improvement, the guide plate comprises a central through hole for making way for the grinding assembly, and a plurality of side guide slots are extended from the outer side of the central through hole, and the diameter of the side guide slots is the same as that of the grinding rod.

[0018] As a further improvement, the guide plate and the side limit plate form a U-shaped structure with an opening facing downward.

[0019] The beneficial effects of the present invention are:

[0020] In the existing microwave tunnel furnace, the size of the tunnel furnace inlet is always the same, regardless of the size of the individual feeds or the total feed amount, the tunnel furnace inlet cannot be adjusted. If the tunnel furnace opening is too large, heat is easily lost. If the tunnel furnace opening is too small, the dehumidification fan needs to increase its power, which easily absorbs part of the battery debris. Therefore, the present invention provides an adjustable opening structure, after providing a fixed part of a fixed area, an adjustable movable part is also provided. The coverage area of ​​the movable part can be adjusted according to the power of the dehumidification fan. When the power of the dehumidification fan gradually increases, it proves that the moisture in the furnace body is too high at this time. The movable part moves upward to expand the feed opening of the microwave oven body, so that the microwave oven body at this time has a certain dehumidification function. When the power of the dehumidification fan is constant or gradually decreases, it means that the current batch of battery debris is relatively dry. The movable part can move downward to reduce the feed opening of the microwave oven body, and most of the heat can be retained in the furnace body, thereby achieving the effect of reducing energy consumption.

[0021] The adjustment distance of the entire movable part is actually limited. If the adjustment of the movable part is relative to the height of the existing feed port, it is difficult to have stability. Therefore, the setting of the fixed part of the present invention is an extension of the entire movable part, providing a certain installation space for the entire movable part, and at the same time making the position of the movable part before and after adjustment within an appropriate range. The adjusted range is more suitable for dehumidification and heat preservation.

[0022] When the movable part moves, what it needs to achieve is surface shielding rather than single-axis or single-column shielding. Therefore, the movable part of the present invention is a whole-surface blocking surface after unfolding, and the internal and external channels are blocked by the blocking surface to control the size of the air inlet surface. The power of the blocking surface can come from manually set movable parts, or electrically set cylinders, which can be customized according to requirements. If the movable part is set to electric form, it is necessary to electrically connect the movable part to the power switch of the dehumidification fan, so as to achieve the effect that the dehumidification fan is strong and the movable part is weak, and if the dehumidification fan is weak, the movable part is strong.

[0023] In fact, what contacts with the limit seats at both ends of the conveyor belt is the entire formed end, so the formed end must have a certain curvature. Therefore, the present invention sets a formed end, and the bottom of the formed end is set as an arc-shaped sealing belt. In order to make the two ends of the arc-shaped sealing belt have stability, fixed anchor points are also set at the bottom of both sides of the arc-shaped sealing belt, so that the two sides of the sealing belt can be stabilized, and the phenomenon of collapse will not occur even under the suction of negative pressure wind.

[0024] Although the battery debris entering the microwave oven body has been crushed, some of them are stacked together or re-bundled. Therefore, if they directly enter the entire microwave oven body for drying, it is easy to cause the front section to not be completely dried, and only gradually dry in the back section, making the overall drying progress uneven, and easily causing the power of a single dehumidification fan to fluctuate. Therefore, the present invention sets a pre-dispersion structure. After the battery debris moves into the microwave oven body, the telescopic part is directly lowered, and the crushing assembly is driven to press downward. When the crushing assembly is pressed downward, it will disperse, thereby crushing the whole ball or the stacked debris, making the debris evenly distributed, and heating more quickly after entering the furnace body, and dehumidifying more evenly. The retracted crushing assembly can also be pulled back by the return material guide assembly to discharge the debris that may be adhered to the crushing assembly, thereby achieving the effect of not taking away the debris each time the crushing is performed, so that the battery debris can be pre-processed into the most uniform state, and the dehumidification fan can also be in a state of extracting moisture without affecting the battery debris.

[0025] During the scattering process of the scattering component, it cannot simply be a crushing action. The crushing action exerts too much pressure and is not suitable for directly acting on the conveyor belt. Otherwise, it is easy to cause deformation or damage to the conveyor belt. Therefore, the scattering component of the present invention adopts the cooperation of a push rod motor and a crushing rod. The crushing rod has a large number of scattering rods and is elastic. Therefore, when the push rod motor is pushed out, the crushing rod will spread out and crush the debris, so that the stacked battery debris will be spread out very widely without affecting the subsequent drying, thereby improving the use effect of the present invention.

[0026] After the battery debris is crushed, the battery debris will overflow. In order to prevent the battery debris from overflowing to a position outside the conveyor belt, two side limit plates are provided on the conveyor belt of the present invention. The two side limit plates are limited on the outer side of the conveyor belt to limit the battery debris in a certain area, so that the battery debris will not leave the dry area and can move forward with the conveyor belt.

[0027] The function of the guide plate is to scrape the battery debris brought up by the crushing rod downwards through its side guide slot when the crushing rod retracts after the crushing action of the crushing rod is completed, thereby leaving all the battery debris at the lower end and avoiding the battery debris from being left at the upper end. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 It is a front view structural schematic diagram of the present invention.

[0030] Figure 2 It is a left-side structural schematic diagram of the present invention.

[0031] Figure 3 It is a schematic structural diagram of the grinding component of the present invention.

[0032] Figure 4 It is a structural schematic diagram of the return material guide assembly of the present invention.

[0033] Figure 5 It is a structural schematic diagram of the adjustable opening structure of the present invention.

[0034] In the figure:

[0035] Conveyor belt 10, microwave oven body 20, dehumidification fan 30, adjustable opening structure 40, fixed portion 41, concave mounting seat 411, tube cavity 412, movable portion 42, movable part 421, blocking surface 422, forming end 43, sealing belt 431, fixed anchor point 432, pre-dispersion structure 50, telescopic member 51, hanging frame 511, push rod motor 512, grinding assembly 52, mounting buckle 521, mounting cavity 522, grinding rod 523, return material guide assembly 53, guide plate 531, middle through hole 5311, side guide slit 5312, side limit plate 532, DETAILED DESCRIPTION

[0036] In order to make the embodiments of the present invention, all belong to the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0037] In the description of the present invention, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as referring to the purpose, technical solutions and advantages of the methods. To be more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 indicate or imply relative importance or implicitly indicate the number of indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0038] Reference Figure 1 to Figure 5 As shown, a microwave tunnel furnace for recycling waste lithium batteries comprises a conveyor belt 10 for conveying battery debris, a microwave oven body 20 is sleeved above the conveyor belt 10, a microwave heating system is arranged inside the microwave oven body 20, a plurality of dehumidification fans 30 are arranged on the top of the microwave oven body 20, and the microwave tunnel furnace also comprises: an adjustable opening structure 40, a feeding port is provided on a side of the microwave oven body 20 close to the battery debris feeding, the adjustable opening structure 40 comprises a fixed part 41 arranged on the inner side of the feeding port, a movable part 42 is movably connected to the lower end of the fixed part 41, the movable part 42 is electrically connected to the power switch of the dehumidification fan 30, a forming end 43 is provided at the end of the movable part 42 away from the fixed part 41, and the forming end 43 The bottom end of the microwave oven 20 is attached to the limit seats at both ends of the conveyor belt 10, and when the microwave heating system of the microwave oven body 20 is started, the movable part 42 extends downward and abuts part of the forming end 43 against the conveyor belt 10; the pre-dispersion structure 50 is arranged on the side of the microwave oven body 20 close to the battery debris feeding, and includes a telescopic part 51 fixed to the top of the microwave oven body 20, and a crushing component 52 is connected below the telescopic part 51. The inner wall of the microwave oven body 20 is provided with a return guide component 53. When the telescopic part 51 is extended, the crushing component 52 is pushed down, and the crushing component 52 pushed down crushes the clumped battery debris on the conveyor belt 10, and when the crushing component 52 retracts, the battery debris on its bottom is scraped off through the return guide component 53.

[0039] When the battery debris is heated, the battery debris is put into the conveyor belt 10 through the unloading structure, and the battery debris is transmitted into the microwave oven body 20 through the conveyor belt 10. After being completely heated by the microwave heating system in the microwave oven body 20, the battery debris is output from the microwave oven body 20.

[0040] In the existing microwave tunnel furnace, the size of the tunnel furnace entrance is always the same. No matter the size of the individual feed or the total feed amount, the tunnel furnace entrance cannot be adjusted. If the tunnel furnace opening is too large, heat is easily lost. If the tunnel furnace opening is too small, the dehumidification fan 30 needs to increase the power, which is easy to absorb some battery debris. Therefore, the present invention provides an adjustable opening structure 40. After the fixed part 41 of the fixed area is provided, an adjustable movable part 42 is also provided. The coverage area of ​​the movable part 42 can be adjusted according to the The power of the dehumidifying fan 30 is adjusted. When the power of the dehumidifying fan 30 gradually increases, it proves that the moisture in the furnace body is too high at this time, and the movable part 42 moves upward to expand the feed port of the microwave oven body 20, so that the microwave oven body 20 at this time has a certain dehumidification function. When the power of the dehumidifying fan 30 is constant or gradually decreases, it means that the battery crumbs of the current batch are relatively dry. In this way, the movable part 42 can be moved downward to reduce the feed port of the microwave oven body 20, and most of the heat can be retained in the furnace body, thereby achieving the effect of reducing energy consumption.

[0041] The adjustment distance of the entire movable part 42 is actually limited. If the adjustment of the movable part 42 is relative to the height of the existing feed port, it is difficult to have stability. Therefore, the fixed part 41 of this embodiment includes a concave mounting seat 411 arranged on the inner side of the feed port, and a plurality of tube cavities 412 are arranged on the inner side of the concave mounting seat 411. The movable part 42 is movably installed in the tube cavity 412. The fixed part 41 is arranged as an extension of the entire movable part 42 to provide a certain installation space for the entire movable part 42. At the same time, the position of the movable part 42 before and after adjustment is within an appropriate range, and the adjusted range is more suitable for dehumidification and heat preservation.

[0042] When the movable part 42 moves, what it needs to do is surface shielding, rather than single-axis or single-column shielding. Therefore, the movable part 42 of this embodiment includes a movable part 421 arranged in the tube cavity 412, and the outer side of the movable part 421 is covered with a blocking surface 422. The upper edge of the blocking surface 422 is glued to the inner wall of the concave mounting seat 411. After the movable part 42 is unfolded, it is a whole blocking surface 422. The blocking surface 422 is used to block the internal and external channels, thereby controlling the size of the air inlet surface. Further, the The movable part 421 is a non-powered bellows, or the movable part 421 is a cylinder, and the power source of the cylinder is electrically connected to the power switch of the dehumidification fan 30. The power of the sealing surface 422 can come from the manually set movable part 421, or the electrically set cylinder, which can be customized according to requirements. If the movable part 421 is set to an electric form, it is necessary to electrically connect the movable part 421 to the power switch of the dehumidification fan 30, so as to achieve the effect that the dehumidification fan 30 is strong and the movable part 421 is weak, and if the dehumidification fan 30 is weak, the movable part 421 is strong.

[0043] In fact, what contacts the limit seats at both ends of the conveyor belt 10 is the entire formed end 43, so the formed end 43 must have a certain curvature. Therefore, the formed end 43 of this embodiment includes a sealing belt 431 arranged at the bottom of the sealing surface 422, and two fixed anchor points 432 are arranged at the two ends of the inner side of the sealing belt 431. The two fixed anchor points 432 are movably installed on the limit seats at both ends of the conveyor belt 10 respectively. When the sealing belt 431 is pulled down or lifted up, the height between the sealing belt 431 and the conveyor belt 10 is changed. Through the set formed end 43, the bottom of the formed end 43 is an arc-shaped sealing belt 431. In order to make the two ends of the arc-shaped sealing belt 431 have a stable force, fixed anchor points 432 are also arranged at the bottom of both sides of the arc-shaped sealing belt 431, so that the two sides of the sealing belt 431 can be stabilized, and the phenomenon of collapse will not occur even under the suction of negative pressure wind.

[0044] Although the battery debris entering the microwave oven body 20 is broken, some of them are stacked together or re-bundled. Therefore, if they directly enter the entire microwave oven body 20 for drying, it is easy to cause the front section to not be completely dried, and gradually dry at the rear section, making the overall drying progress uneven, and easily causing the power of the single dehumidification fan 30 to fluctuate. Therefore, the present invention sets a pre-dispersion structure 50. After the battery debris moves into the microwave oven body 20, the telescopic part 51 is directly lowered, and the crushing component 52 is driven to press downward. When the crushing component 52 is pressed downward, it will disperse, thereby crushing the whole or stacked debris apart, making the debris evenly distributed, and heating more quickly after entering the furnace body, and dehumidifying more evenly. The retracted crushing component 52 can also be pulled back by the return guide component 53 to discharge the debris that may be adhered to the crushing component 52, thereby achieving the effect of not taking away the debris each time the crushing is performed.

[0045] Among them, the power of the pre-dispersion structure 50 comes from the telescopic part 51, and the telescopic part 51 is installed in the microwave oven body 20. Specifically, the telescopic part 51 includes a hanging bracket 511 fixedly connected to the inner wall of the microwave oven body 20, and a push rod motor 512 is suspended on the hanging bracket 511. The bottom of the push rod motor 512 is connected to the grinding assembly 52, and the grinding assembly 52 is driven by the action of the push rod motor 512.

[0046] During the crushing process of the crushing component 52, it cannot simply be a crushing action. The crushing action applies too much pressure and is not suitable for directly acting on the conveyor belt 10, otherwise it is easy to cause the conveyor belt 10 to deform or be damaged. Therefore, the crushing component 52 of this embodiment includes a mounting buckle 521 connected to the output end of the push rod motor 512, and a plurality of mounting cavities 522 are fixedly connected below the mounting buckle 521. A crushing rod 523 is inserted in the mounting cavity 522, and the crushing rod 523 is elastically set. The crushing component 52 adopts the cooperation of the push rod motor 512 and the crushing rod 523. The crushing rod 523 is dispersed in large numbers and has elasticity, so that when the push rod motor 512 is pushed out, the crushing rod 523 will spread out and crush the debris, so that the stacked battery debris will be spread out very widely, which will not affect the subsequent drying, thereby improving the use effect of the present invention.

[0047] After the battery debris is crushed, the battery debris will overflow. In order to prevent the battery debris from overflowing to a position outside the conveyor belt 10, the return material guide assembly 53 of this embodiment includes a guide plate 531 parallel to the suspension frame 511, and a side limit plate 532 is connected to the bottom of the guide plate 531. The side limit plate 532 is fixed on the limit seats at both ends of the conveyor belt 10. Two side limit plates 532 are provided on the conveyor belt 10. The two side limit plates 532 are limited to the outer side of the conveyor belt 10 to limit the battery debris in a certain area, so that it will not leave the dry area and can move forward with the conveyor belt 10.

[0048] Furthermore, the guide plate 531 includes a central through hole 5311 for making way for the crushing assembly 52, and a plurality of side guide slits 5312 are extended on the outer side of the central through hole 5311. The side guide slits 5312 have the same diameter as the crushing rod 523. The function of the guide plate 531 is to scrape downward the battery debris brought up by the crushing rod 523 through its side guide slits 5312 when the crushing rod 523 retracts after the crushing action of the crushing rod 523 is completed, thereby leaving all the battery debris at the lower end and avoiding the battery debris from being left at the upper end.

[0049] In order to maintain the stable state of the guide plate 531 and the side limit plate 532, the guide plate 531 and the side limit plate 532 form a U-shaped structure with an opening facing downward.

[0050] 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 microwave tunnel furnace for recycling waste lithium batteries, comprising a conveyor belt (10) for conveying battery debris, a microwave oven body (20) is sleeved above the conveyor belt (10), a microwave heating system is arranged inside the microwave oven body (20), and a plurality of dehumidification fans (30) are arranged on the top of the microwave oven body (20), characterized in that: The microwave tunnel furnace also includes: An adjustable opening structure (40), wherein a feeding port is provided on a side of the microwave oven body (20) close to the battery debris feeding port, the adjustable opening structure (40) comprises a fixed portion (41) arranged on the inner side of the feeding port, a movable portion (42) is movably connected to the lower end of the fixed portion (41), the movable portion (42) is electrically connected to the power switch of the dehumidification fan (30), a shaped end (43) is provided at one end of the movable portion (42) away from the fixed portion (41), the bottom end of the shaped end (43) is attached to the limit seats at both ends of the conveyor belt (10), and when the microwave heating system of the microwave oven body (20) is started, the movable portion (42) extends downward and abuts a portion of the shaped end (43) against the conveyor belt (10); The pre-dispersion structure (50) is arranged on a side of the microwave oven body (20) close to the battery debris feeding, and includes a telescopic member (51) fixedly connected to the top of the microwave oven body (20), a crushing assembly (52) is connected below the telescopic member (51), and a return material guide assembly (53) is arranged on the inner wall of the microwave oven body (20). When the telescopic member (51) is extended, the crushing assembly (52) is pushed down, and the crushing assembly (52) pushed down crushes the battery debris on the conveyor belt (10). When the crushing assembly (52) is retracted, the battery debris on the bottom is scraped off through the return material guide assembly (53).

2. A microwave tunnel furnace for recycling waste lithium batteries according to claim 1, characterized in that: The fixed part (41) comprises a concave mounting seat (411) arranged on the inner side of the feed port, a plurality of cavities (412) are arranged on the inner side of the concave mounting seat (411), and the movable part (42) is movably mounted in the cavities (412).

3. A microwave tunnel furnace for recycling waste lithium batteries according to claim 2, characterized in that: The movable part (42) comprises a movable member (421) arranged in the tube cavity (412), the outer side of the movable member (421) is covered with a sealing surface (422), and the upper edge of the sealing surface (422) is glued to the inner wall of the concave mounting seat (411).

4. A microwave tunnel furnace for recycling waste lithium batteries according to claim 3, characterized in that: The movable part (421) is a non-powered bellows, or the movable part (421) is a cylinder, and the power source of the cylinder is electrically connected to the power switch of the dehumidification fan (30).

5. The microwave tunnel furnace for recycling waste lithium batteries according to claim 1, characterized in that: The molding end (43) comprises a sealing belt (431) arranged at the bottom of the sealing surface (422), and two fixed anchor points (432) are arranged at both ends of the inner side of the sealing belt (431). The two fixed anchor points (432) are movably mounted on the limit seats at both ends of the conveyor belt (10), and the height between the sealing belt (431) and the conveyor belt (10) is changed when the sealing belt (431) is pulled down or lifted up.

6. The microwave tunnel furnace for recycling waste lithium batteries according to claim 1, characterized in that: The telescopic member (51) comprises a hanging bracket (511) fixedly connected to the inner wall of the microwave oven body (20), a push rod motor (512) is hung on the hanging bracket (511), and the bottom of the push rod motor (512) is connected to the grinding assembly (52).

7. The microwave tunnel furnace for recycling waste lithium batteries according to claim 1, characterized in that: The grinding assembly (52) comprises a mounting buckle (521) connected to the output end of the push rod motor (512), a plurality of mounting cavities (522) are fixedly connected below the mounting buckle (521), grinding rods (523) are inserted into the mounting cavities (522), and the grinding rods (523) are elastically arranged.

8. The microwave tunnel furnace for recycling waste lithium batteries according to claim 1, characterized in that: The return material guide assembly (53) comprises a guide plate (531) parallel to the suspension frame (511), and a side limit plate (532) is connected below the guide plate (531), and the side limit plate (532) is fixed on the limit seats at both ends of the conveyor belt (10).

9. A microwave tunnel furnace for recycling waste lithium batteries according to claim 8, characterized in that: The guide plate (531) comprises a central through hole (5311) for making way for the grinding assembly (52), and a plurality of side guide slots (5312) are extended from the outer side of the central through hole (5311), and the diameter of the side guide slots (5312) is the same as that of the grinding rod (523).

10. The microwave tunnel furnace for recycling waste lithium batteries according to claim 8, characterized in that: The guide plate (531) and the side limiting plate (532) form a U-shaped structure with an opening facing downward.

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