CN114657383B - Rare metal recovery method and device - Google Patents

Abstract

The invention relates to a rare metal recovery method and a device thereof, belonging to the technical field of metal recovery, and comprising a workbench and a dissolving tank positioned above the workbench, wherein one side of the top of the workbench is rotationally connected with a first rotating shaft through a supporting plate, the outer wall of the first rotating shaft is fixedly sleeved with two rotating plates, the other ends of the two rotating plates are fixedly connected with the dissolving tank, and the top of the workbench is fixedly connected with a plurality of U-shaped frames.

Description

A rare metal recovery method and device

Technical Field

The invention belongs to the technical field of metal recovery and relates to a rare metal recovery method and a device thereof.

Background technique

Rare metals are mainly used to manufacture special steels, super-hard alloys and high-temperature resistant alloys. In the electrical industry, chemical industry, ceramic industry, atomic energy industry and rocket technology, the name of rare metals is relatively relative. With the extensive research on rare metals, the discovery of new sources and new refining methods and the expansion of their application scope, the boundary between rare metals and other metals will gradually disappear. For example, the content of some rare metals in the earth's crust is higher than that of copper, mercury, cadmium and other metals, but the recovery rate of rare metals is low. There are still many rare metals that cannot be recovered, resulting in a waste of resources. Rare metal recovery mostly involves putting a mixture containing rare metals into a chemical tank, adding chemical solutions for stirring, corroding unnecessary materials, and then leaving rare metals for recycling.

The new device with announcement number CN215440631U discloses a rare metal refining waste slag recovery device. The waste slag enters the dissolution box from the feed port, and the motor is started. The motor drives the stirring rod to rotate, and the stirring rod drives the stirring blade to rotate in a clockwise direction. At this time, the lower valve of the solvent barrel is opened, and the solvent enters the dissolution box. The stirring blade is fully stirred. After the stirring is completed, the liquid enters the reduction box through the U-shaped tube and the third pipeline. At this time, the valve of the reducing agent barrel is opened, the reducing agent enters the reduction box, and the water in the water tank enters the reduction box through the water pipe, and then the reduction is carried out. After the reduction is completed, the reduced liquid enters the mixing box through the U-shaped tube and the third pipeline. At this time, the drying box dries the excess water inside the mixing box, and then the valve of the extractant barrel is opened, and the extractant is poured into the mixing box, and then the valve of the feed pipe is opened, and then the mixed liquid enters the extractor through the feed pipe for extraction, and the extracted metal comes out from the discharge port.

In the above technical solution, the waste slag is poured into the dissolution box, and the waste slag in the dissolution box is stirred by rotating the stirring blades. Since the waste slag contains rare metals, the waste slag will settle at the bottom of the dissolution box. Therefore, the rotation of the stirring blades cannot effectively move the waste slag, and then the waste slag cannot be fully separated from the dissolving liquid, and the unnecessary materials cannot be fully corroded, which affects the recovery quality and efficiency of the rare metals. In addition, in the above technical solution, after the stirring is completed, the liquid enters the reduction box through the U-tube and the third pipe, but the rare metals cannot enter the reduction box through the U-tube and the third pipe, so that rare metals remain in the dissolution box.

Summary of the invention

In view of this, the present invention provides a rare metal recovery device to solve the problems of poor quality and low efficiency of rare metal recovery in the prior art and residual rare metals in the dissolution box.

In order to achieve the above object, the present invention provides the following technical solutions:

A rare metal recovery device comprises a workbench and a dissolving box located above the workbench, one side of the top of the workbench is rotatably connected to a first rotating shaft through a supporting plate, two rotating plates are fixedly sleeved on the outer wall of the first rotating shaft, the other ends of the two rotating plates are fixedly connected to the dissolving box, a plurality of U-shaped frames are fixedly connected to the top of the workbench, and the top of the U-shaped frame touches the bottom of the dissolving box, a filter box is arranged below the workbench, the bottom inner wall of the filter box is rotatably connected to a rotating rod rotatably penetrating the top of the filter box, a collecting box is arranged on one side of the filter box, and a heating plate is fixedly embedded on the inner wall of the dissolving box on one side away from each other;

A stirring assembly for stirring the dissolving liquid and the rare metal in the dissolving box is provided on one side of the dissolving box;

The filter box is provided with a filter assembly for filtering rare metals inside;

The top of the filter box is provided with a discharge assembly for discharging the dissolving liquid and the rare metals in the dissolving box into the filter box.

Furthermore, the stirring assembly includes a driving motor fixedly connected to the side of the dissolving box away from the first rotating shaft, a rotating shaft is connected to the dissolving box in a transversely rotatable manner, and the output shaft of the driving motor extends into the dissolving box and is fixedly connected to the rotating shaft, a plurality of arc-shaped plates are annularly provided on the outer wall of the rotating shaft, a plurality of rectangular holes are equidistantly provided in the arc-shaped plates, and a connected feed hopper is provided on the top of the dissolving box.

Furthermore, the filter assembly includes a fine filter plate and a coarse filter plate slidably connected in the filter box, and the coarse filter plate is located above the fine filter plate, and a plurality of connecting plates are slidably connected to the inner wall of one side of the filter box, and the top and bottom ends of the connecting plates are fixedly connected to the coarse filter plate and the fine filter plate respectively, a rotating motor is provided in the filter box, and the output shaft of the rotating motor is fixedly connected to the bottom end of the rotating rod, the top end of the rotating rod passes through the fine filter plate and the coarse filter plate respectively, and two discharge ports are provided on one side of the filter box close to the collecting box, and the two discharge ports correspond to the fine filter plate and the coarse filter plate respectively, and two fixed blocks are fixedly connected to the outer wall of the rotating rod, and the two fixed blocks are respectively located below the coarse filter plate and the fine filter plate.

Furthermore, the discharge assembly includes a sleeve arranged on the top of the filter box, and the top end of the sleeve slides through the workbench and is slidably connected to the bottom of the dissolving box, the top end of the rotating rod is fixedly connected to a reciprocating screw, a nut is fixedly connected inside the sleeve, and the top thread of the reciprocating screw passes through the nut and extends into the sleeve, a discharge port is provided on the side of the dissolving box close to the first rotating shaft, a conduit is provided in the discharge port, and the other end of the conduit extends into the filter box and is located above the coarse filter plate, a closing plate and a floating plate are slidably connected to the inner wall of the side of the dissolving box close to the discharge port, and the bottom of the floating plate and the top of the closing plate are fixedly connected with the same first pull rope.

Furthermore, a fixed plate is fixedly connected to the top of the dissolving box, and a sliding plate in contact with the dissolving box is slidably connected to one side of the fixed plate, and a second pull rope is fixedly connected to one side of the sliding plate, and the other end of the second pull rope extends into the dissolving box and is fixedly connected to the top of the floating plate in a sealed manner. The top of the dissolving box is rotatably connected to a roller through a support plate, and the outer wall of the roller is in contact with the second pull rope. When the dissolving box is tilted, the dissolved liquid and rare metals in the dissolving box enter the filter box through the discharge port and the conduit, and the liquid level of the dissolved liquid in the dissolving box gradually decreases, and the friction between the sliding plate and the top of the dissolving box is greater than the self-weight of the closing plate and the floating plate. Therefore, it can prevent the closing plate and the floating plate from sliding downward when the floating plate loses buoyancy, thereby closing the discharge port, resulting in a large amount of dissolved liquid and rare metals remaining in the dissolving box.

Furthermore, an L-shaped floating plate is slidably connected to the inner wall of the top of the box, and a load-bearing block is arranged inside the L-shaped floating plate. When the dissolving box is tilted, the dissolved liquid in the dissolving box flows to the right, and then the liquid level in the dissolving box begins to rise, and the L-shaped floating plate slides to the upper right due to the buoyancy of the dissolved liquid, and can close the feed hopper to prevent the dissolved liquid in the dissolving box from flowing out through the feed hopper. When the dissolved liquid in the dissolving box enters the filter box, the liquid level of the dissolved liquid in the dissolving box begins to drop, and the L-shaped floating plate and the load-bearing block slide to the lower left under the force of gravity, and the feed hopper is reopened.

Furthermore, a slide groove is provided at the bottom of the dissolving box, and the top of the sleeve is rotatably connected to a slider through a support plate, and the top of the slider extends into the slide groove and is slidably connected to the slide groove.

Furthermore, one side of the filter box is fixedly connected to a rectangular frame located above the aggregate box, a second rotating shaft rotates and penetrates the rectangular frame, the outer wall fixed sleeve of the second rotating shaft is provided with a first synchronous wheel, the outer wall fixed sleeve of the rotating rod is provided with a second synchronous wheel, the second synchronous wheel and the first synchronous wheel are connected through a synchronous belt transmission, the bottom end of the second rotating shaft extends into the rectangular frame and is fixedly connected to a fan, a plurality of resistance wire heating tubes are fixedly connected to the inner wall of the rectangular frame, a metal filter plate is fixedly connected to the aggregate box, and the rotating rod can drive the second synchronous wheel to rotate when it rotates, and the second synchronous wheel drives the second rotating shaft and the fan to rotate through the synchronous belt and the first synchronous wheel, and then starts the resistance wire heating tube. When the fan rotates, the fan can blow the air heated by the resistance wire heating tube downward, thereby quickly drying the rare metals on the metal filter plate.

Furthermore, the bottom inner wall of the aggregate box is fixedly connected to an air guide plate located below the metal filter plate, and a plurality of through holes are provided on the side of the aggregate box away from the air guide plate. The hot air blown out by the fan can flow to the outside through the through holes after being guided by the air guide plate, thereby increasing the circulation of hot air in the aggregate box and accelerating the drying of rare metals.

The recycling method of the rare metal recycling device comprises the following steps:

S1. Pour the waste slag into the dissolution box containing the dissolving liquid through the feed hopper, start the heating plate, increase the temperature in the dissolution box through the heating plate, start the driving motor to drive the rotating shaft and the arc plate to rotate, and as the arc plate rotates, the arc plate can push the waste slag deposited at the bottom of the dissolution box upward, and the waste slag moves to the middle under the action of the arc surface of the arc plate, and can fall back to the bottom of the dissolution box when passing through the rectangular hole on the arc plate, so that the waste slag and the dissolving liquid can be fully mixed, thereby increasing the corrosion efficiency of the unnecessary materials in the waste slag;

S2. When the corrosion of the unwanted materials in the waste slag is completed, the rotating motor is started to drive the rotating rod to rotate, and the rotating rod drives the reciprocating screw to rotate. The reciprocating screw is threadedly connected with the nut. As the reciprocating screw rotates, the nut drives the sleeve and the slider to move upward, and then the dissolving box can be pushed upward through the slider and the sleeve, and the dissolving box rotates counterclockwise with the first rotating shaft as the fulcrum;

S3. When the dissolving box rotates counterclockwise, the dissolved liquid and the rare metal waste slag in the dissolving box slide to the left, and when the dissolved liquid flows to the left, the floating plate moves upward due to the buoyancy of the dissolved liquid, and the floating plate drives the closing plate to slide upward through the first pull rope, thereby opening the discharge port, and when the dissolving box rotates, when the gravity of the fixed plate is greater than the friction between the fixed plate and the dissolving box, the fixed plate slides obliquely downward along the sliding plate, and the fixed plate pulls the floating plate and the closing plate upward through the second pull rope to keep the discharge port open;

S4. The dissolved liquid and rare metals in the dissolving box enter the filter box through the discharge port and the conduit. At this time, the rotating motor continues to drive the rotating rod and the reciprocating screw to rotate. When the dissolved liquid and the rare metals fall on the coarse filter plate, the coarse filter plate first screens the large particles of rare metals in the dissolved liquid and the rare metals, and then screens the small particles of rare metals through the fine filter plate. When the rotating rod rotates, it can drive the fixed block to rotate. With the rotation of the fixed block, when the two fixed blocks touch the right bottom of the coarse filter plate and the fine filter plate respectively, the two fixed blocks can respectively drive the fine filter plate and the coarse filter plate to move upward. When the fixed block leaves, the fine filter plate and the coarse filter plate fall again under their own gravity, so that the fine filter plate and the coarse filter plate can vibrate up and down to filter the rare metals.

S5. With the vibration of the fine filter plate and the coarse filter plate, the filtered rare metals fall onto the metal filter plate in the aggregate box through the discharge port, and can drive the second synchronous wheel to rotate when the rotating rod rotates. The second synchronous wheel drives the second rotating shaft and the fan to rotate through the synchronous belt and the first synchronous wheel, and then starts the resistance wire heating tube. When the fan rotates, the fan can blow the air heated by the resistance wire heating tube downward, thereby quickly drying the rare metals on the metal filter plate, and the hot air blown out by the fan can flow to the outside through the through hole after being guided by the air guide plate, thereby increasing the circulation of hot air in the aggregate box and accelerating the drying of the rare metals.

The beneficial effects of the present invention are:

1. A rare metal recovery device disclosed in the present invention drives the rotating shaft and the arc plate to rotate by starting a driving motor. As the arc plate rotates, the arc plate can push the waste slag deposited at the bottom of the dissolution box upward, and the waste slag can fall back to the bottom of the dissolution box when passing through the rectangular holes on the arc plate. In the process of the rare metal falling, the waste slag and the dissolving liquid can be fully mixed, thereby increasing the corrosion efficiency of the unnecessary materials in the waste slag, and the heating plate can increase the dissolution temperature, thereby accelerating the corrosion of the unnecessary materials in the waste slag;

2. A rare metal recovery device disclosed in the present invention drives a rotating rod to rotate by a rotating motor, and the rotating rod drives a reciprocating screw to rotate. As the reciprocating screw rotates, the nut drives the sleeve and the slider to move upward, and then the dissolving box can be pushed upward by the slider and the sleeve. The dissolving box rotates counterclockwise with the first rotating shaft as a fulcrum, and then the rare metals in the dissolving box slide to the lower left, so that all the rare metals can enter the filter box through the discharge port and the guide tube, avoiding the rare metals remaining in the dissolving box;

3. A rare metal recovery device disclosed in the present invention allows the dissolving liquid and the rare metal waste residue in the dissolving box to slide to the left. When the dissolving liquid flows to the left, the floating plate is driven by the buoyancy of the dissolving liquid to slide the closing plate upward, thereby opening the discharge port. When the dissolving box rotates, when the gravity of the fixed plate is greater than the friction between the fixed plate and the dissolving box, the fixed plate slides obliquely downward along the sliding plate. The fixed plate pulls the floating plate and the closing plate upward through the second pull rope to keep the discharge port open, thereby preventing the loss of the dissolving liquid, resulting in insufficient buoyancy of the floating plate, causing the closing plate to close the discharge port, and rare metals remain in the dissolving box.

4. A rare metal recovery device disclosed in the present invention drives the second synchronous wheel to rotate by rotating the rotating rod, and the second synchronous wheel drives the second rotating shaft and the fan to rotate through the synchronous belt and the first synchronous wheel, and then starts the resistance wire heating tube. When the fan rotates, the fan can blow the air heated by the resistance wire heating tube downward to quickly dry the rare metals on the metal filter plate.

The present invention can start the driving motor to drive the rotating shaft and the arc plate to rotate, so that the waste residue can be fully mixed with the dissolving liquid, and the corrosion efficiency of the unnecessary materials can be accelerated. When the rotating motor drives the rotating rod and the reciprocating screw to rotate, not only can the rare metals be filtered through the collision of the two fixed blocks with the fine filter plate and the coarse filter plate respectively, but also the sleeve can be moved upward to discharge the dissolving liquid and the rare metals in the dissolving box into the filter box, so as to avoid the rare metals and the dissolving liquid remaining in the dissolving box.

Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

FIG1 is a three-dimensional diagram of a rare metal recovery device proposed by the present invention from a first viewing angle;

FIG2 is a three-dimensional diagram of a rare metal recovery device proposed by the present invention from a second viewing angle;

FIG3 is a front cross-sectional view of a rare metal recovery device proposed by the present invention;

FIG4 is an A-A cross-sectional view of a rare metal recovery device proposed by the present invention;

FIG5 is a three-dimensional diagram of a dissolving tank of a rare metal recovery device proposed by the present invention;

FIG6 is a three-dimensional cross-sectional view of a dissolving tank of a rare metal recovery device proposed by the present invention;

FIG7 is a three-dimensional diagram of a slider of a rare metal recovery device proposed by the present invention;

FIG8 is a three-dimensional diagram of a fixed plate and a sliding plate of a rare metal recovery device proposed by the present invention;

FIG9 is a front cross-sectional view of a filter box of a rare metal recovery device according to the second embodiment of the present invention.

Figure numerals: 1, workbench; 2, first rotating shaft; 3, rotating plate; 4, dissolving box; 5, U-shaped frame; 6, feeding hopper; 7, rotating shaft; 8, driving motor; 9, arc plate; 10, rectangular hole; 11, discharge port; 12, closing plate; 13, floating plate; 14, first pull rope; 15, second pull rope; 16, fixed plate; 17, sliding plate; 18, filter box; 19, fine filter plate; 20, coarse filter plate; 21, fixed block; 22, connecting plate; 23, rotating rod; 24, Reciprocating screw; 25. sleeve; 26. nut; 27. rotating motor; 28. discharge port; 29. collecting box; 30. rectangular frame; 31. second rotating shaft; 32. first synchronous wheel; 33. second synchronous wheel; 34. synchronous belt; 35. fan; 36. resistance wire heating tube; 37. metal filter plate; 38. air guide plate; 39. through hole; 40. L-shaped floating plate; 41. load-bearing block; 42. heating plate; 43. roller; 44. slide groove; 45. slider; 46. conduit.

Detailed ways

The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and the features in the embodiments can be combined with each other without conflict.

Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "back" and the like indicate directions or positional relationships, they are based on the directions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

Embodiment 1

A rare metal recovery device as shown in Figures 1-8 includes a workbench 1 and a dissolving box 4 located above the workbench 1. One side of the top of the workbench 1 is rotatably connected to a first rotating shaft 2 through a support plate. Two rotating plates 3 are fixedly sleeved on the outer wall of the first rotating shaft 2. The other ends of the two rotating plates 3 are fixedly connected to the dissolving box 4 by bolts. A plurality of U-shaped frames 5 are fixedly connected to the top of the workbench 1 by bolts, and the top of the U-shaped frame 5 touches the bottom of the dissolving box 4. A filter box 18 is provided below the workbench 1. The bottom inner wall of the filter box 18 is rotatably connected to a rotating rod 23 that rotates and penetrates the top of the filter box 18. A collection box 29 is provided on one side of the filter box 18. A heating plate 42 is fixedly embedded in the inner wall of the dissolving box 4 on one side away from each other by bolts. A device for mixing the dissolved liquid in the dissolving box 4 with the rare metal is provided on one side. The filter box 18 is a stirring component for stirring, and a filtering component for filtering rare metals is provided inside the filter box 18. The top of the filter box 18 is provided with a discharge component for discharging the dissolved liquid and the rare metals in the dissolved box 4 into the filter box 18. The top inner wall of the dissolved box 4 is slidably connected with an L-shaped floating plate 40, and a load-bearing block 41 is provided in the L-shaped floating plate 40. When the dissolved box 4 is tilted, the dissolved liquid in the dissolved box 4 flows to the right, and then the liquid level in the dissolved box 4 begins to rise. The L-shaped floating plate 40 slides to the upper right under the action of the buoyancy of the dissolved liquid, and can close the feed hopper 6 to prevent the dissolved liquid in the dissolved box 4 from flowing out through the feed hopper 6. When the dissolved liquid in the dissolved box 4 enters the filter box 18, the dissolved liquid level in the dissolved box 4 begins to drop, and the L-shaped floating plate 40 and the load-bearing block 41 slide to the lower left under the gravity factor, and the feed hopper 6 is reopened.

In the present invention, the stirring assembly includes a driving motor 8 fixedly connected to the dissolving box 4 on the side away from the first rotating shaft 2 by bolts, the dissolving box 4 is connected with a rotating shaft 7 in a transversely rotatable manner, and the output shaft of the driving motor 8 extends into the dissolving box 4 and is fixedly connected to the rotating shaft 7 by bolts, the outer wall of the rotating shaft 7 is annularly provided with a plurality of arc plates 9, and a plurality of rectangular holes 10 are equidistantly provided in the arc plates 9, and a connected feed hopper 6 is provided on the top of the dissolving box 4, and the rotating shaft 7 and the arc plates 9 are driven to rotate by starting the driving motor 8. As the arc plates 9 rotate, the arc plates 9 can push the waste slag deposited at the bottom of the dissolving box 4 upward, and the waste slag can fall back to the bottom of the dissolving box 4 when passing through the rectangular holes 10 on the arc plates 9. In the process of the rare metal falling, the waste slag can be fully mixed with the dissolving liquid, thereby increasing the corrosion efficiency of unnecessary materials in the waste slag, and the heating plate 42 can increase the dissolution temperature and accelerate the corrosion of unnecessary materials in the waste slag.

In the present invention, the filter assembly includes a fine filter plate 19 and a coarse filter plate 20 which are slidably connected in the filter box 18, and the coarse filter plate 20 is located above the fine filter plate 19. A plurality of connecting plates 22 are slidably connected to the inner wall of one side of the filter box 18. The top and bottom ends of the connecting plates 22 are fixedly connected to the coarse filter plate 20 and the fine filter plate 19 by bolts respectively. A rotating motor 27 is provided in the filter box 18, and the output shaft of the rotating motor 27 is fixedly connected to the bottom end of the rotating rod 23 by a coupling. The top end of the rotating rod 23 passes through the fine filter plate 19 and the coarse filter plate 20 respectively. Two discharge ports 28 are provided on one side of the filter box 18 close to the collecting box 29, and the two discharge ports 28 correspond to the fine filter plate 19 and the coarse filter plate 20 respectively. The outer wall of the rotating rod 23 is fixedly connected to two fixing blocks 21 by bolts, and the two fixing blocks 21 are respectively located below the coarse filter plate 20 and the fine filter plate 19.

In the present invention, the discharge assembly includes a sleeve 25 arranged on the top of the filter box 18, and the top end of the sleeve 25 slides through the workbench 1 and is slidably connected to the bottom of the dissolving box 4, the top end of the rotating rod 23 is fixedly connected to the reciprocating screw 24 by bolts, a nut 26 is fixedly connected inside the sleeve 25, and the top end of the reciprocating screw 24 is threadedly passed through the nut 26 and extends into the sleeve 25, a discharge port 11 is provided on the side of the dissolving box 4 close to the first rotating shaft 2, a conduit 46 is provided in the discharge port 11, and the other end of the conduit 46 extends into the filter box 18 and is located above the coarse filter plate 20, and a closing plate 1 is slidably connected to the inner wall of the side of the dissolving box 4 close to the discharge port 11 2 and the floating plate 13, the bottom of the floating plate 13 and the top of the closing plate 12 are fixedly connected with the same first pull rope 14, the rotating motor 27 drives the rotating rod 23 to rotate, the rotating rod 23 drives the reciprocating screw 24 to rotate, as the reciprocating screw 24 rotates, the nut 26 drives the sleeve 25 and the slider 45 to move upward, and then the slider 45 and the sleeve 25 can push the dissolving box 4 upward, the dissolving box 4 rotates counterclockwise with the first rotating shaft 2 as the fulcrum, and then the rare metals in the dissolving box 4 slide to the lower left, so that all the rare metals can enter the filter box 18 through the discharge port 11 and the conduit 46, so as to avoid the rare metals remaining in the dissolving box 4.

The top of the dissolving box 4 is fixedly connected with a fixed plate 16 by bolts, and one side of the fixed plate 16 is slidably connected with a sliding plate 17 that contacts the dissolving box 4. One side of the sliding plate 17 is fixedly connected with a second pull rope 15, and the other end of the second pull rope 15 is sealed and extends into the dissolving box 4 and is fixedly connected with the top of the floating plate 13. The top of the dissolving box 4 is rotatably connected with a roller 43 through a support plate, and the outer wall of the roller 43 contacts with the second pull rope 15. When the dissolving box 4 is tilted, the dissolved liquid and rare metals in the dissolving box 4 enter the filter box 18 through the discharge port 11 and the conduit 46, and the liquid level of the dissolved liquid in the dissolving box 4 gradually decreases, and the friction between the sliding plate 17 and the top of the dissolving box 4 is greater than the self-weight of the closing plate 12 and the floating plate 13. Therefore, it can prevent the floating plate 13 from sliding downward due to the loss of buoyancy, thereby closing the discharge port 11, resulting in a large amount of dissolved liquid and rare metals remaining in the dissolving box 4.

In the present invention, a slide groove 44 is provided at the bottom of the dissolving box 4, and the top of the sleeve 25 is rotatably connected to the slider 45 through a support plate, and the top of the slider 45 extends into the slide groove 44 and is slidably connected to the slide groove 44.

In the present invention, the dissolving solution in the present invention is the same as the compound solution in the announcement number 210646096U.

Embodiment 2

As a further improvement of the previous embodiment, as shown in Figures 1-9, a rare metal recovery device includes a workbench 1 and a dissolving box 4 located above the workbench 1. One side of the top of the workbench 1 is rotatably connected to a first rotating shaft 2 through a support plate. The outer wall fixed sleeve of the first rotating shaft 2 is provided with two rotating plates 3. The other ends of the two rotating plates 3 are fixedly connected to the dissolving box 4 by bolts. The top of the workbench 1 is fixedly connected to a plurality of U-shaped frames 5 by bolts, and the top of the U-shaped frame 5 touches the bottom of the dissolving box 4. A filter box 18 is provided below the workbench 1. The bottom inner wall of the filter box 18 is rotatably connected to a rotating rod 23 that rotates and penetrates the top of the filter box 18. A collection box 29 is provided on one side of the filter box 18. The inner walls of the sides of the dissolving box 4 that are away from each other are fixedly embedded with a heating plate 42 by bolts. One side of the dissolving box 4 is provided with a heating plate 42 for dissolving the dissolving box 4. The filter box 18 is provided with a stirring component for stirring the dissolved liquid and the rare metals in the dissolving box 4, and the filter box 18 is provided with a filtering component for filtering the rare metals inside. The top of the filter box 18 is provided with a discharging component for discharging the dissolved liquid and the rare metals in the dissolving box 4 into the filter box 18. The top inner wall of the dissolving box 4 is slidably connected with an L-shaped floating plate 40, and a load-bearing block 41 is provided in the L-shaped floating plate 40. When the dissolving box 4 is tilted, the dissolved liquid in the dissolving box 4 flows to the right, and then the liquid level in the dissolving box 4 begins to rise. The L-shaped floating plate 40 slides to the upper right under the action of the buoyancy of the dissolved liquid, and can close the feed hopper 6 to prevent the dissolved liquid in the dissolving box 4 from flowing out through the feed hopper 6. When the dissolved liquid in the dissolving box 4 enters the filter box 18, the dissolved liquid level in the dissolving box 4 begins to drop, and the L-shaped floating plate 40 and the load-bearing block 41 slide to the lower left under the gravity factor, and the feed hopper 6 is reopened.

In the present invention, the stirring assembly includes a driving motor 8 fixedly connected to the dissolving box 4 on the side away from the first rotating shaft 2 by bolts, the dissolving box 4 is connected with a rotating shaft 7 in a transversely rotatable manner, and the output shaft of the driving motor 8 extends into the dissolving box 4 and is fixedly connected to the rotating shaft 7 by bolts, the outer wall of the rotating shaft 7 is annularly provided with a plurality of arc plates 9, and a plurality of rectangular holes 10 are equidistantly provided in the arc plates 9, and a connected feed hopper 6 is provided on the top of the dissolving box 4, and the rotating shaft 7 and the arc plates 9 are driven to rotate by starting the driving motor 8. As the arc plates 9 rotate, the arc plates 9 can push the waste slag deposited at the bottom of the dissolving box 4 upward, and the waste slag can fall back to the bottom of the dissolving box 4 when passing through the rectangular holes 10 on the arc plates 9. In the process of the rare metal falling, the waste slag can be fully mixed with the dissolving liquid, thereby increasing the corrosion efficiency of unnecessary materials in the waste slag, and the heating plate 42 can increase the dissolution temperature and accelerate the corrosion of unnecessary materials in the waste slag.

In the present invention, the filter assembly includes a fine filter plate 19 and a coarse filter plate 20 which are slidably connected in the filter box 18, and the coarse filter plate 20 is located above the fine filter plate 19. A plurality of connecting plates 22 are slidably connected to the inner wall of one side of the filter box 18. The top and bottom ends of the connecting plates 22 are fixedly connected to the coarse filter plate 20 and the fine filter plate 19 by bolts respectively. A rotating motor 27 is provided in the filter box 18, and the output shaft of the rotating motor 27 is fixedly connected to the bottom end of the rotating rod 23 by a coupling. The top end of the rotating rod 23 passes through the fine filter plate 19 and the coarse filter plate 20 respectively. Two discharge ports 28 are provided on one side of the filter box 18 close to the collecting box 29, and the two discharge ports 28 correspond to the fine filter plate 19 and the coarse filter plate 20 respectively. The outer wall of the rotating rod 23 is fixedly connected to two fixing blocks 21 by bolts, and the two fixing blocks 21 are respectively located below the coarse filter plate 20 and the fine filter plate 19.

In the present invention, the discharge assembly includes a sleeve 25 arranged on the top of the filter box 18, and the top end of the sleeve 25 slides through the workbench 1 and is slidably connected to the bottom of the dissolving box 4, the top end of the rotating rod 23 is fixedly connected to the reciprocating screw 24 by bolts, a nut 26 is fixedly connected inside the sleeve 25, and the top end of the reciprocating screw 24 is threadedly passed through the nut 26 and extends into the sleeve 25, a discharge port 11 is provided on the side of the dissolving box 4 close to the first rotating shaft 2, a conduit 46 is provided in the discharge port 11, and the other end of the conduit 46 extends into the filter box 18 and is located above the coarse filter plate 20, and a closing plate 1 is slidably connected to the inner wall of the side of the dissolving box 4 close to the discharge port 11 2 and the floating plate 13, the bottom of the floating plate 13 and the top of the closing plate 12 are fixedly connected with the same first pull rope 14, the rotating motor 27 drives the rotating rod 23 to rotate, the rotating rod 23 drives the reciprocating screw 24 to rotate, as the reciprocating screw 24 rotates, the nut 26 drives the sleeve 25 and the slider 45 to move upward, and then the slider 45 and the sleeve 25 can push the dissolving box 4 upward, the dissolving box 4 rotates counterclockwise with the first rotating shaft 2 as the fulcrum, and then the rare metals in the dissolving box 4 slide to the lower left, so that all the rare metals can enter the filter box 18 through the discharge port 11 and the conduit 46, avoiding the rare metals remaining in the dissolving box 4.

The top of the dissolving box 4 is fixedly connected with a fixed plate 16 by bolts, and one side of the fixed plate 16 is slidably connected with a sliding plate 17 that contacts the dissolving box 4. One side of the sliding plate 17 is fixedly connected with a second pull rope 15, and the other end of the second pull rope 15 is sealed and extends into the dissolving box 4 and is fixedly connected with the top of the floating plate 13. The top of the dissolving box 4 is rotatably connected with a roller 43 through a support plate, and the outer wall of the roller 43 contacts with the second pull rope 15. When the dissolving box 4 is tilted, the dissolved liquid and rare metals in the dissolving box 4 enter the filter box 18 through the discharge port 11 and the conduit 46, and the liquid level of the dissolved liquid in the dissolving box 4 gradually decreases, and the friction between the sliding plate 17 and the top of the dissolving box 4 is greater than the self-weight of the closing plate 12 and the floating plate 13. Therefore, it can prevent the floating plate 13 from sliding downward due to the loss of buoyancy, thereby closing the discharge port 11, resulting in a large amount of dissolved liquid and rare metals remaining in the dissolving box 4.

In the present invention, a slide groove 44 is provided at the bottom of the dissolving box 4, and the top of the sleeve 25 is rotatably connected to the slider 45 through a support plate, and the top of the slider 45 extends into the slide groove 44 and is slidably connected to the slide groove 44.

In the present invention, the dissolving solution in the present invention is the same as the compound solution in the announcement number 210646096U.

The second rotating shaft 31 is rotated through the rectangular frame 30, and the outer wall fixed sleeve of the second rotating shaft 31 is provided with a first synchronous wheel 32, and the outer wall fixed sleeve of the rotating rod 23 is provided with a second synchronous wheel 33. The second synchronous wheel 33 and the first synchronous wheel 32 are connected by a synchronous belt 34. The bottom end of the second rotating shaft 31 extends into the rectangular frame 30 and is fixedly connected with a fan 35. The inner wall of the rectangular frame 30 is fixedly connected with a plurality of resistance wire heating tubes 36 by bolts. A metal filter plate 37 is fixedly connected with the collecting box 29 by bolts. When the rotating rod 23 rotates, it can drive the second synchronous wheel 33 to rotate. The second synchronous wheel 33 drives the second rotating shaft 31 and the fan 35 to rotate through the synchronous belt 34 and the first synchronous wheel 32, and then starts the resistance wire heating tube 36. When the fan 35 rotates, the fan 35 can blow the air heated by the resistance wire heating tube 36 downward, thereby quickly drying the rare metals on the metal filter plate 37.

In the present invention, the bottom inner wall of the aggregate box 29 is fixedly connected with an air guide plate 38 located below the metal filter plate 37 by bolts, and a plurality of through holes 39 are provided on the side of the aggregate box 29 away from the air guide plate 38. The hot air blown out by the fan 35 can flow to the outside through the through holes 39 after being guided by the air guide plate 38, thereby increasing the circulation of hot air in the aggregate box 29 and accelerating the drying of rare metals.

The advantages of the second embodiment over the first embodiment are that a rectangular frame 30 located above the aggregate box 29 is fixedly connected to one side of the filter box 18 by bolts, a second rotating shaft 31 rotates through the rectangular frame 30, a first synchronous wheel 32 is provided on the outer wall fixed sleeve of the second rotating shaft 31, a second synchronous wheel 33 is provided on the outer wall fixed sleeve of the rotating rod 23, the second synchronous wheel 33 is connected to the first synchronous wheel 32 by a synchronous belt 34, the bottom end of the second rotating shaft 31 extends into the rectangular frame 30 and is fixedly connected to a fan 35, a plurality of resistance wire heating tubes 36 are fixedly connected to the inner wall of the rectangular frame 30 by bolts, and a metal filter plate 37 is fixedly connected to the aggregate box 29 by bolts.

A recycling method of a rare metal recycling device, comprising the following steps:

S1, pour the waste slag into the dissolving box 4 containing the dissolving liquid through the feed hopper 6, start the heating plate 42, increase the temperature in the dissolving box 4 through the heating plate 42, start the driving motor 8 to drive the rotating shaft 7 and the arc plate 9 to rotate, and as the arc plate 9 rotates, the arc plate 9 can push the waste slag deposited at the bottom of the dissolving box 4 upward, and the waste slag moves to the middle under the action of the arc surface of the arc plate 9, and can fall back to the bottom of the dissolving box 4 when passing through the rectangular hole 10 on the arc plate 9, so that the waste slag and the dissolving liquid can be fully mixed, thereby increasing the corrosion efficiency of the unnecessary materials in the waste slag;

S2. When the corrosion of the unnecessary materials in the waste residue is completed, the rotating motor 27 is started to drive the rotating rod 23 to rotate, and the rotating rod 23 drives the reciprocating screw 24 to rotate. The reciprocating screw 24 is threadedly connected with the nut 26. As the reciprocating screw 24 rotates, the nut 26 drives the sleeve 25 and the slider 45 to move upward, and then the dissolving box 4 can be pushed upward through the slider 45 and the sleeve 25, and the dissolving box 4 rotates counterclockwise with the first rotating shaft 2 as the fulcrum;

S3. When the dissolving box 4 rotates counterclockwise, the dissolved liquid and the rare metal waste slag in the dissolving box 4 slide to the left, and when the dissolved liquid flows to the left, the floating plate 13 moves upward under the action of the buoyancy of the dissolved liquid, and the floating plate 13 drives the closing plate 12 to slide upward through the first pull rope 14, thereby opening the discharge port 11, and when the dissolving box 4 rotates, when the gravity of the fixed plate 16 is greater than the friction between the fixed plate 16 and the dissolving box 4, the fixed plate 16 slides obliquely downward along the sliding plate 17, and the fixed plate 16 pulls the floating plate 13 and the closing plate 12 upward through the second pull rope 15 to keep the discharge port 11 open;

S4, the dissolved liquid and rare metals in the dissolving box 4 enter the filter box 18 through the discharge port 11 and the conduit 46. At this time, the rotating motor 27 continues to drive the rotating rod 23 and the reciprocating screw 24 to rotate. When the dissolved liquid and the rare metals fall on the coarse filter plate 20, the coarse filter plate 20 first screens the large particles of rare metals in the dissolved liquid and the rare metals, and then screens the small particles of rare metals through the fine filter plate 19. When the rotating rod 23 rotates, it can drive the fixed block 21 to rotate. With the rotation of the fixed block 21, when the two fixed blocks 21 touch the right bottom of the coarse filter plate 20 and the fine filter plate 19 respectively, the two fixed blocks 21 can respectively drive the fine filter plate 19 and the coarse filter plate 20 to move upward. When the fixed block 21 leaves, the fine filter plate 19 and the coarse filter plate 20 fall again under their own gravity, so that the fine filter plate 19 and the coarse filter plate 20 can vibrate up and down to filter the rare metals.

S5. With the vibration of the fine filter plate 19 and the coarse filter plate 20, the filtered rare metals fall onto the metal filter plate 37 in the collection box 29 through the discharge port 28, and can drive the second synchronous wheel 33 to rotate when the rotating rod 23 rotates. The second synchronous wheel 33 drives the second rotating shaft 31 and the fan 35 to rotate through the synchronous belt 34 and the first synchronous wheel 32, and then starts the resistance wire heating tube 36. When the fan 35 rotates, the fan 35 can blow the air heated by the resistance wire heating tube 36 downward, thereby quickly drying the rare metals on the metal filter plate 37, and the hot air blown out by the fan 35 can flow to the outside through the through hole 39 after being guided by the air guide plate 38, thereby increasing the circulation of hot air in the collection box 29 and accelerating the drying of the rare metals.

However, as is well known to those skilled in the art, the working principles and wiring methods of the drive motor 8, rotating motor 27, resistance wire heating tube 36, fan 35 and heating plate 42 are conventional means or common knowledge in the technical field and will not be elaborated here. Those skilled in the art may make any optional selections according to their needs or convenience.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims (7)

1. The utility model provides a rare metal recovery unit, includes workstation (1) and is located dissolving case (4) of workstation (1) top, its characterized in that, top one side of workstation (1) is connected with first pivot (2) through the backup pad rotation, the fixed cover of outer wall of first pivot (2) is equipped with two rotation boards (3), two the other end of rotation board (3) all with dissolve case (4) fixed connection, the top fixedly connected with of workstation (1) a plurality of U type framves (5), and the top of U type frame (5) touches with the bottom of dissolving case (4), the below of workstation (1) is equipped with filter box (18), the bottom inner wall rotation of filter box (18) is connected with rotation dwang (23) that runs through the top of filter box (18), one side of filter box (18) is equipped with collection box (29), the inner wall of one side that dissolving case (4) kept away from each other is all fixed inlays and is equipped with heating plate (42);

One side of the dissolving box (4) is provided with a stirring assembly for stirring the dissolving liquid in the dissolving box (4) and rare metals; the stirring assembly comprises a driving motor (8) fixedly connected to one side, far away from the first rotating shaft (2), of the dissolving box (4), a rotating shaft (7) is transversely connected in the dissolving box (4) in a rotating mode, an output shaft of the driving motor (8) extends into the dissolving box (4) and is fixedly connected with the rotating shaft (7), a plurality of arc plates (9) are annularly arranged on the outer wall of the rotating shaft (7), a plurality of rectangular holes (10) are formed in the arc plates (9) at equal intervals, and a feeding hopper (6) which is communicated with the top of the dissolving box (4) is arranged;

A filter assembly for filtering rare metals is arranged in the filter box (18); the filter assembly comprises a fine filter plate (19) and a coarse filter plate (20) which are slidably connected in a filter box (18), the coarse filter plate (20) is located above the fine filter plate (19), one side inner wall of the filter box (18) is slidably connected with a plurality of connecting plates (22), the top end and the bottom end of each connecting plate (22) are fixedly connected with the coarse filter plate (20) and the fine filter plate (19) respectively, a rotating motor (27) is arranged in the filter box (18), an output shaft of the rotating motor (27) is fixedly connected with the bottom end of a rotating rod (23), the top end of the rotating rod (23) penetrates through the fine filter plate (19) and the coarse filter plate (20) respectively, two discharge openings (28) are formed in one side, close to a material collecting box (29), of each discharge opening (28) corresponds to the fine filter plate (19) and the coarse filter plate (20), two fixing blocks (21) are fixedly connected to the outer wall of the rotating rod (23), and the two fixing blocks (21) are located below the fine filter plate (20) and the fine filter plate (19) respectively;

The top of the filter box (18) is provided with a discharging component for discharging the dissolving liquid and rare metals in the dissolving box (4) into the filter box (18); the discharging assembly comprises a sleeve (25) arranged at the top of the filter tank (18), the top end of the sleeve (25) is slidably penetrated through the workbench (1) and is slidably connected with the bottom of the dissolution tank (4), the top end of the rotating rod (23) is fixedly connected with a reciprocating screw rod (24), a nut (26) is fixedly connected in the sleeve (25), the top thread of the reciprocating screw rod (24) penetrates through the nut (26) and extends into the sleeve (25), and one side, close to the first rotating shaft (2), of the dissolution tank (4) is provided with a discharge hole (11).

2. The rare metal recovery device according to claim 1, wherein a fixing plate (16) is fixedly connected to the top of the dissolution tank (4), a sliding plate (17) which is in contact with the dissolution tank (4) is slidably connected to one side of the fixing plate (16), a second pull rope (15) is fixedly connected to one side of the sliding plate (17), the other end of the second pull rope (15) extends into the dissolution tank (4) in a sealing manner and is fixedly connected with the top of the floating plate (13), a roller (43) is rotatably connected to the top of the dissolution tank (4) through a supporting plate, and the outer wall of the roller (43) is in contact with the second pull rope (15).

3. The rare metal recovery device according to claim 2, wherein the discharging assembly further comprises a guide pipe (46) arranged in the discharging hole (11), the other end of the guide pipe (46) extends into the filter tank (18) and is located above the coarse filter plate (20), a sealing plate (12) and a floating plate (13) are slidably connected to the inner wall of one side of the dissolving tank (4) close to the discharging hole (11), and the bottom of the floating plate (13) and the top of the sealing plate (12) are fixedly connected with the same first pull rope (14).

4. A rare metal recovery device according to claim 3, characterized in that the top inner wall of the dissolution tank (4) is slidably connected with an L-shaped floating plate (40), a bearing block (41) is arranged in the L-shaped floating plate (40), a chute (44) is arranged at the bottom of the dissolution tank (4), a slide block (45) is rotatably connected to the top end of the sleeve (25) through the supporting plate, and the top of the slide block (45) extends into the chute (44) and is slidably connected with the chute (44).

5. The rare metal recovery device according to claim 4, wherein a rectangular frame (30) located above the material collecting box (29) is fixedly connected to one side of the filter box (18), a second rotating shaft (31) is penetrated through the rectangular frame (30) in a rotating mode, a first synchronizing wheel (32) is fixedly sleeved on the outer wall of the second rotating shaft (31), a second synchronizing wheel (33) is fixedly sleeved on the outer wall of the rotating rod (23), and the second synchronizing wheel (33) is in transmission connection with the first synchronizing wheel (32) through a synchronous belt (34).

6. The rare metal recovery device according to claim 5, wherein the bottom end of the second rotating shaft (31) extends into the rectangular frame (30) and is fixedly connected with a fan (35), the inner wall of the rectangular frame (30) is fixedly connected with a plurality of resistance wire heating pipes (36), the inside of the collecting box (29) is fixedly connected with a metal filter plate (37), the bottom inner wall of the collecting box (29) is fixedly connected with an air deflector (38) positioned below the metal filter plate (37), and one side of the collecting box (29) away from the air deflector (38) is provided with a plurality of through holes (39).

7. The method for recovering a rare metal according to claim 6, comprising the steps of:

S1, pouring waste residues into a dissolving box (4) containing dissolving liquid through a feed hopper (6), starting a heating plate (42), increasing the temperature in the dissolving box (4) through the heating plate (42), starting a driving motor (8) to drive a rotating shaft (7) and an arc plate (9) to rotate, and enabling the arc plate (9) to push the waste residues deposited at the bottom of the dissolving box (4) upwards along with the rotation of the arc plate (9), wherein the waste residues move towards the middle under the action of the arc surface of the arc plate (9), and can fall to the bottom of the dissolving box (4) again when passing through a rectangular hole (10) in the arc plate (9);

S2, after corrosion of unnecessary materials in waste residues is finished, a rotating motor (27) is started to drive a rotating rod (23) to rotate, the rotating rod (23) drives a reciprocating screw (24) to rotate, the reciprocating screw (24) is in threaded connection with a nut (26), the nut (26) drives a sleeve (25) and a sliding block (45) to move upwards along with the rotation of the reciprocating screw (24), and then the dissolving box (4) can be pushed upwards through the sliding block (45) and the sleeve (25), and the dissolving box (4) rotates anticlockwise by taking a first rotating shaft (2) as a fulcrum;

S3, when the dissolving box (4) rotates anticlockwise, dissolving liquid and rare metal waste residues in the dissolving box (4) slide leftwards, when the dissolving liquid flows leftwards, the floating plate (13) moves upwards under the action of floating force of the dissolving liquid, the floating plate (13) drives the sealing plate (12) to slide upwards through the first pull rope (14), so that the discharge hole (11) is opened, and when the dissolving box (4) rotates, when the gravity of the fixing plate (16) is greater than the friction force between the fixing plate (16) and the dissolving box (4), the fixing plate (16) slides downwards obliquely along the sliding plate (17), and the fixing plate (16) pulls the floating plate (13) and the sealing plate (12) upwards through the second pull rope (15), so that the discharge hole (11) is kept in an opened state;

S4, dissolving liquid and rare metals in the dissolving tank (4) enter the filter tank (18) through the discharge hole (11) and the guide pipe (46), at the moment, the rotating motor (27) still continuously drives the rotating rod (23) and the reciprocating screw (24) to rotate, when the dissolving liquid and the rare metals fall on the coarse filter plate (20), the coarse filter plate (20) firstly screens large-particle rare metals in the dissolving liquid and the rare metals, then screens small-particle rare metals through the fine filter plate (19), the rotating rod (23) can drive the fixed block (21) to rotate, and along with the rotation of the fixed block (21), when the two fixed blocks (21) respectively collide with the right bottoms of the coarse filter plate (20) and the fine filter plate (19), the two fixed blocks (21) can respectively drive the fine filter plate (19) and the coarse filter plate (20) to move upwards, and after the fixed blocks (21) leave, the fine filter plate (19) and the coarse filter plate (20) can fall down again under the self gravity factor, so that the fine filter plate (19) and the fine filter plate (20) can vibrate up and down;

S5, along with vibration of the fine filter plate (19) and the coarse filter plate (20), filtered rare metal falls onto a metal filter plate (37) in a material collecting box (29) through a discharge hole (28), and when a rotating rod (23) rotates, a second synchronous wheel (33) can be driven to rotate, the second synchronous wheel (33) drives a second rotating shaft (31) and a fan (35) to rotate through a synchronous belt (34) and a first synchronous wheel (32), then a resistance wire heating pipe (36) is started, and when the fan (35) rotates, the fan (35) can blow air heated by the resistance wire heating pipe (36) downwards.