Neodymium-iron-boron waste environment-friendly recycling equipment

Abstract

The invention provides neodymium iron boron waste environment-friendly recycling equipment, and relates to the technical field of neodymium iron boron waste treatment.The recycling equipment comprises a roasting furnace body, an outer frame body, a leaching groove body and a roasting disc mechanism, and the roasting disc mechanism comprises a roasting disc, an air guide driving component, a roasting disc bearing component and a vertical movement driving component; a lower partition plate piece is arranged at the bottom of the roasting plate; when the lower separation disc piece is separated from the sliding fit with the inner wall of the lower cylinder body, the rotating action part can act on the roasting disc bearing part and enables the lower separation disc piece to rotate through the roasting disc bearing part; an air outlet turning rod assembly is further arranged on the upper surface of the roasting disc, and the air guide driving part can drive the air outlet turning rod assembly to rotate and guide oxygen flow into the air outlet turning rod assembly. The device is simple in structure, neodymium-iron-boron waste is turned through the air outlet turning rod assembly and fully roasted, after roasting, discharging can be rapidly conducted, the neodymium-iron-boron waste slides into the leaching tank body, rare earth element leaching liquid is heated through heat of the neodymium-iron-boron waste, and use is convenient.

Description

Technical Field

[0001] The invention relates to the technical field of NdFeB waste treatment, and in particular to an environmentally friendly recycling device for NdFeB waste. Background Art

[0002] NdFeB is an alloy composed of neodymium, iron and boron. It has excellent magnetic properties and is one of the strongest permanent magnet materials known. The extraction and impurity removal process of NdFeB waste involves multiple steps, including pretreatment of waste, leaching of rare earth elements, removal of impurities, etc.; Rare earth element leaching: Through the oxidation roasting-hydrochloric acid decomposition method, the rare earth elements in NdFeB waste are converted into soluble chlorides for subsequent extraction. Roasting at 700°C for 1.5 hours can maximize the oxidation rate of iron, and then leaching is carried out using 4 mol / L hydrochloric acid with a liquid-solid ratio of 5:1. After reacting at 90°C for 1.5 hours, the rare earth leaching rate can reach 99.33.

[0003] In the conventional NdFeB scrap roasting process, a large amount of NdFeB magnet scrap will be attracted to each other due to its strong magnetic force to form a mass structure, which will cause the scrap to be heated unevenly during the heating process. The scrap in the outer layer can directly contact the heat source and heat up quickly, while the scrap in the inner layer is difficult to reach the same temperature due to the obstruction of the outer scrap, which effectively affects the effect of scrap roasting and leads to insufficient oxidation of iron in the scrap. Summary of the invention

[0004] The purpose of the present invention is to provide an environmentally friendly recycling device for NdFeB waste to solve the technical problems existing in the prior art.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A kind of environmental protection recycling equipment for NdFeB waste, comprises a roasting furnace body, an outer frame body, a leaching tank body and a roasting plate mechanism, wherein the roasting furnace body and the leaching tank body are both arranged on the roasting furnace body and the roasting furnace body is located on the upper side of the leaching tank body, a feeding part is arranged on the top of the roasting furnace body, the bottom opening of the roasting furnace body is arranged and a lower cylinder is arranged, and a plurality of roasting heating parts are arranged on the inner wall of the roasting furnace body; the roasting plate mechanism comprises a roasting plate, an air guide driving component, a roasting plate supporting component and a vertical movement driving component, the roasting plate is arranged inside the roasting furnace body and can be removed from the bottom opening; a lower partition member located inside the lower cylinder body is arranged at the bottom of the roasting plate, and the outer wall of the roasting plate is slidably matched with the position of the inner wall of the lower cylinder body close to the roasting furnace body; the roasting plate supporting component is arranged at the bottom of the lower cylinder body and one end of the roasting plate supporting component is slidably matched with the inner wall of the lower cylinder body along its axial direction, and the roasting plate supporting component is slidably matched with the inner wall of the lower cylinder body The vertical movement driving component on the outer wall of the furnace body is connected and is used to drive the baking tray supporting component to move vertically; a rotating action component is also provided inside the lower cylinder body and is connected to the baking tray supporting component; when the lower partition plate is separated from the sliding cooperation with the inner wall of the lower cylinder body, the rotating action component can act on the baking tray supporting component and rotate the lower partition plate through the baking tray supporting component; an air outlet turning rod assembly is also provided on the upper surface of the baking tray and is rotatably connected to the center of the baking tray, the air guide driving component is arranged inside the baking furnace body and the top of the air guide driving component is connected to the top wall of the baking furnace body, and the bottom of the air guide driving component can be detachably connected to the center position of the air outlet turning rod assembly inside the baking furnace body; when the air guide driving component is connected to the air outlet turning rod assembly, the air guide driving component can drive the air outlet turning rod assembly to rotate and introduce oxygen flow into the air outlet turning rod assembly.

[0007] On the basis of the above technical solution, the present invention also provides the following optional technical solution:

[0008] In an optional scheme: the air outlet flip rod assembly includes a center seat and multiple flip rods, the center seat is rotatably arranged on the upper surface of the baking tray and has a socket at the center of the center seat for connecting with the bottom of the air guide drive component, multiple flip rods are circumferentially distributed on the outside of the center seat and one end of the flip rod is fixedly connected to the outer wall of the center seat, the outer wall of the flip rod has multiple air holes and the inside of the flip rod is connected to the center seat.

[0009] In an optional scheme: the air-guiding driving component includes a hollow main shaft portion, an outer cylinder, an air injection portion and a flipping motor, the hollow main shaft portion is arranged inside the roasting furnace body and the top of the hollow main shaft portion is rotatably connected to the top wall of the roasting furnace body through the outer cylinder body, the flipping motor is arranged at the top of the roasting furnace body and the output end of the flipping motor is connected to the outer cylinder body through a gear transmission pair, the air injection portion is arranged at the top of the outer cylinder body and the air outlet end of the air injection portion is connected to the inside of the hollow main shaft portion, the bottom of the hollow main shaft portion has an insert block portion that can be inserted into the socket and the outer wall of the insert block portion has an air-guiding hole that can be connected to the flipping rod.

[0010] In an optional scheme: the rotating action part has a rack near the bottom, at least one guide slide is arranged on the inner wall of the leaching tank, and the edge of the outer wall of the lower partition plate has at least one boss that slides with the guide slide; the roasting plate supporting part includes a supporting shaft part and a supporting arm, the supporting shaft part is fixed to the bottom of the lower partition plate through a support, and a rotating gear part is arranged at the end of the lower partition plate, and the rotating gear part can engage with the rack on the rotating action part; one end of the supporting arm is rotatably connected to the supporting shaft part and the other end is connected to the vertical movement driving part.

[0011] In an optional scheme: a guide avoidance hole is opened on the outer wall of the lower cylinder, the supporting arm passes through the guide avoidance hole and vertically slides with the inner wall, the vertical movement driving component includes a vertical movement screw rod, a vertical movement motor and a screw sleeve part, the vertical movement screw rod part is rotatably arranged on the outer wall of the lower cylinder and the top of the vertical movement screw rod part is connected to the output end of the vertical movement motor, the screw sleeve part is fixed to the end of the supporting arm extending to the outer wall of the lower cylinder, and the vertical movement screw rod part spirally penetrates the screw sleeve part.

[0012] In an optional scheme: the bottom of the center seat has a lower rotating shaft portion extending to the bottom of the lower partition plate, and the bottom end of the lower rotating shaft portion is provided with a toggle gear portion, the supporting rotating shaft portion is provided with two guide plates, and the guide plates are fixedly connected to the ends of the supporting arms, the toggle gear portion is located between the two guide plates, and arc teeth are provided on the opposite surfaces of the two guide plates; when the baking plate is in an inclined state and the protruding seat is disconnected from the guide slide, the toggle gear portion is alternately meshed with the two arc teeth.

[0013] In an optional solution: the lower partition plate is made of a heat-insulating material, and the outer diameter of the lower partition plate is greater than the inner diameter of the roasting furnace body.

[0014] In an optional scheme: at least one roasting gas outlet component is also provided on the outside of the roasting furnace body, and the roasting gas outlet component includes an gas outlet pipe and a curved heat exchange tube. One end of the gas outlet pipe extends from the top of the roasting furnace body to the inside of the roasting furnace body. The curved heat exchange tube is arranged inside the leaching tank body and close to the inner wall of the leaching tank body. The lower end of the gas outlet pipe is connected to the curved heat exchange tube.

[0015] In an optional scheme: a connecting pipe is arranged between the lower end of the outlet pipe and the curved heat exchange tube, one end of the connecting pipe is fixedly connected to the curved heat exchange tube, and the connecting pipe and the end of the outlet pipe away from the roasting furnace body are detachably connected through a valve body connecting part; the valve body connecting part is used to adjust the flow speed of the airflow inside the outlet pipe.

[0016] In an optional scheme: two symmetrical material receiving components are also provided inside the leaching tank body, and the material receiving components include a material receiving fixing rod and a material receiving sleeve part, the material receiving fixing rod is fixed at a position close to the side wall inside the leaching tank body, the material receiving sleeve part is rotatably sleeved on the material receiving fixing rod, and the material receiving sleeve part and the material receiving fixing rod are connected through a spring bearing, a material receiving plate is provided on the material receiving sleeve part, and a plurality of lower stirring rods are provided on the side of the material receiving plate away from the material receiving sleeve part.

[0017] By adopting the above technical solution, the present invention has the following beneficial effects:

[0018] In the environmentally friendly recycling equipment device for NdFeB waste provided by the present invention, the air-guiding driving component drives the air outlet turning rod assembly to rotate relative to the roasting plate, and the air outlet turning rod assembly can move the NdFeB waste on the surface of the roasting plate and turn it over, so that the NdFeB waste will not be concentrated in one place and the NdFeB waste can be evenly heated and roasted, and the air-guiding driving component also introduces an oxygen flow to the air outlet turning rod assembly, and the oxygen flow is discharged through the side of the air outlet turning rod assembly, which can increase the contact surface between the oxygen flow and the NdFeB waste and further improve the oxidation rate of iron; the roasting plate supporting component drives the lower partition plate to move downward and rotate, and the roasting plate gradually rotates from a horizontal state to a vertical state, so that the NdFeB waste that has been roasted on the roasting plate slides along the roasting plate and falls into the leaching tank. The invention has a simple structure, and the NdFeB waste is turned over by the gas outlet turning rod assembly and fully roasted. After roasting, the material can be quickly discharged and slid into the inside of the leaching tank body, and the rare earth element leaching liquid is heated by its own heat, which is convenient for use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 The figure is a schematic diagram of the overall structure of the recovery device in one embodiment of the present invention.

[0021] Figure 2 This is a schematic structural diagram of one viewing angle of the interior of a roasting furnace body in one embodiment of the present invention.

[0022] Figure 3 This is a schematic structural diagram of the interior of a roasting furnace body from another perspective in one embodiment of the present invention.

[0023] Figure 4 This is a schematic structural diagram of a baking tray in one embodiment of the present invention from one viewing angle.

[0024] Figure 5 It is a schematic structural diagram of a baking tray in one embodiment of the present invention from another viewing angle.

[0025] Figure 6 It is a schematic diagram of the structure of the gas guide drive component in one embodiment of the present invention.

[0026] Figure 7 for Figure 1 Enlarged structural diagram at A in the middle.

[0027] Figure 8 The figure is a schematic diagram of the leaching tank structure in one embodiment of the present invention.

[0028] Notes on reference numerals: roasting furnace body 100, roasting heating part 110, feeding part 120, outer frame 200, leaching tank body 300, material receiving fixing rod 310, material receiving sleeve part 320, material receiving plate 330, lower stirring rod 340, lower cylinder 400, guide slide 410, rotating action part 420, guide avoidance hole 430, roasting plate 500, lower partition plate 510, air outlet turning rod assembly 520, center seat 521, turning rod 522, air hole part 523, lower rotating shaft part 524, toggle gear part 525, convex seat 530, roasting air outlet component 600, air outlet pipe 610, connecting pipe 620, valve body connecting part 630, curved heat exchange tube 640, air guide drive component 700, hollow main shaft part 710, outer cylinder 720, air injection part 730, gear transmission pair 740, flip motor 750, insert block part 760, air guide hole 761, baking plate supporting component 800, supporting shaft part 810, rotating gear part 820, supporting arm 830, guide plate 840, arc tooth body 841, vertical movement drive component 900, vertical movement screw rod part 910, vertical movement motor 920, screw sleeve part 930. DETAILED DESCRIPTION

[0029] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] The left, right, up, and down positions of the various components given in the drawings are only one arrangement method, and the specific positions are set according to specific needs.

[0031] In one embodiment, Figure 1-Figure 7As shown, an environmentally friendly recycling device for NdFeB waste includes a roasting furnace body 100, an outer frame body 200, a leaching tank body 300 and a roasting plate mechanism, wherein the roasting furnace body 100 and the leaching tank body 300 are both arranged on the roasting furnace body 100 and the roasting furnace body 100 is located on the upper side of the leaching tank body 300, a feeding part 120 is arranged on the top of the roasting furnace body 100, the bottom of the roasting furnace body 100 is opened and provided with a lower cylinder 400, and a plurality of roasting heating parts 110 are arranged on the inner wall of the roasting furnace body 100; the roasting plate mechanism includes a roasting plate 500, an air guide driving component 700, a baking tray supporting component 800 and a vertical movement driving component 900, wherein the baking tray 500 is arranged inside the baking furnace body 100 and can be removed from the bottom opening; a lower partition member 510 located inside the lower cylinder 400 is arranged at the bottom of the baking tray 500, and the outer wall of the baking tray 500 is slidably matched with the inner wall of the lower cylinder 400 near the baking furnace body 100; the baking tray supporting component 800 is arranged at the bottom of the lower cylinder 400, and one end of the baking tray supporting component 800 is slidably matched with the inner wall of the lower cylinder 400 along its axial direction, and the baking tray supporting component 800 The lower cylinder 400 is connected to the vertical driving component 900 provided on the outer wall of the roasting furnace body 100 and is used to drive the roasting plate supporting component 800 to move vertically; the lower cylinder 400 is also provided with a rotating action part 420 and the rotating action part 420 is connected to the roasting plate supporting component 800; when the lower partition plate 510 is separated from the sliding cooperation with the inner wall of the lower cylinder 400, the rotating action part 420 can act on the roasting plate supporting component 800 and rotate the lower partition plate 510 through the roasting plate supporting component 800; the upper surface of the roasting plate 500 is also An air outlet turning rod assembly 520 is provided, the center of which is rotatably connected to the center of the roasting plate 500, the air guiding drive component 700 is arranged inside the roasting furnace body 100 and the top of the air guiding drive component 700 is connected to the top wall of the roasting furnace body 100, and the bottom of the air guiding drive component 700 can be detachably connected to the center position of the air outlet turning rod assembly 520 inside the roasting furnace body 100; when the air guiding drive component 700 is connected to the air outlet turning rod assembly 520, the air guiding drive component 700 can drive the air outlet turning rod assembly 520 to rotate and introduce oxygen flow into the air outlet turning rod assembly 520.

[0032] In the embodiment of the present invention, the NdFeB waste is disposed in the roasting furnace body 100 from the feed part 120 and the NdFeB waste falls on the upper surface of the roasting plate 500, and the multiple roasting heating parts 110 start to work and roast the NdFeB waste on the roasting plate 500. At this time, the bottom end of the gas guide drive component 700 is connected to the center position of the gas outlet turning rod assembly 520, and the gas guide drive component 700 works and drives the gas outlet turning rod assembly 520 to rotate relative to the roasting plate 500. The gas outlet turning rod assembly 520 can move the NdFeB waste on the surface of the roasting plate 500 and turn it over, so that the NdFeB waste will not gather. The NdFeB waste is uniformly heated and roasted in one place, and the gas guide drive component 700 also introduces oxygen flow to the gas outlet turning rod assembly 520, and the oxygen flow is discharged through the side of the gas outlet turning rod assembly 520, which can increase the contact surface between the oxygen flow and the NdFeB waste, and further increase the oxidation rate of iron; after the NdFeB waste is roasted, the gas guide drive component 700 and the roasting heating part 110 both stop working; the vertical drive component 900 starts to work and the vertical drive component 900 drives the roasting plate supporting component 800 to move downward, and the roasting plate supporting component 800 drives the lower partition plate 510 and the roasting plate 500 downward When the baking tray 500 enters the lower cylinder 400 and the outer wall of the lower partition plate 510 is separated from the sliding connection with the inner wall of the lower cylinder 400, the rotating action part 420 acts on the baking tray supporting part 800 and drives the lower partition plate 510 to rotate around the connection between the lower partition plate 510 and the baking tray supporting part 800 through the baking tray supporting part 800, and the baking tray 500 gradually rotates from a horizontal state to a vertical state, so that the baking tray 500 has been completed. The calcined NdFeB waste slides along the calcination plate 500 and falls into the leaching tank body 300, and the NdFeB waste reacts with the rare earth element leaching solution in the leaching tank body 300 to leach rare earths; during the leaching process, non-rare earth impurities are removed by adjusting the pH value and aging time; finally, the rare earth elements are separated from the rare earth element leaching solution by precipitation method to complete the recovery and treatment of the NdFeB waste; since the calcined NdFeB waste contains more heat, it can increase the temperature of the rare earth element leaching solution after falling into the leaching tank body 300, which can reduce the resource loss of heating the rare earth element leaching solution.

[0033] In one embodiment, Figure 2-Figure 5As shown, the air outlet turning rod assembly 520 includes a central seat 521 and a plurality of turning rods 522, wherein the central seat 521 is rotatably arranged on the upper surface of the baking tray 500 and the center of the central seat 521 has a socket for connecting with the bottom of the air guide driving component 700, and the plurality of turning rods 522 are circumferentially distributed on the outer side of the central seat 521 and one end of the turning rod 522 is fixedly connected to the outer wall of the central seat 521, and the outer wall of the turning rod 522 has a plurality of air holes 523 and the inside of the turning rod 522 is connected to the central seat 521; in the embodiment of the present invention, when the baking tray 500 is in the baking state, the turning rod 522 is in the baking state. When the inside of the furnace body 100 is fired, the bottom of the gas-guiding driving component 700 is plugged into the inside of the socket, the gas-guiding driving component 700 works and drives the center seat 521 to rotate, the center seat 521 drives multiple flipping rods 522 to rotate and the flipping rods 522 act on the NdFeB waste on the roasting plate 500, and the NdFeB waste is flipped for sufficient roasting; at the same time, the gas-guiding driving component 700 introduces an oxygen flow into the socket, the oxygen flow is introduced into the flipping rods 522 through the socket and is ejected from the pore portion 523, the oxygen flow directly acts on the NdFeB waste, and the iron in the NdFeB waste can be fully oxidized.

[0034] In one embodiment, Figure 2-Figure 7 As shown, the air guide driving component 700 includes a hollow main shaft portion 710, an outer cylinder 720, an air injection portion 730 and a flipping motor 750. The hollow main shaft portion 710 is arranged inside the roasting furnace body 100 and the top of the hollow main shaft portion 710 is rotatably connected to the top wall of the roasting furnace body 100 through the outer cylinder 720. The flipping motor 750 is arranged at the top of the roasting furnace body 100 and the output end of the flipping motor 750 is connected to the outer cylinder 720 through a gear transmission pair 740. The air injection portion 730 is arranged at the top of the outer cylinder 720 and the air outlet end of the air injection portion 730 is connected to the inside of the hollow main shaft portion 710. The bottom of the hollow main shaft portion 710 has an insert block portion 750 that can be inserted into the socket. 60 and the outer wall of the insert block 760 has an air guide hole 761 that can be connected to the flip rod 522; in the embodiment of the present invention, the gas injection part 730 introduces an oxygen flow into the interior of the hollow main shaft part 710, and the oxygen flows through the insert block 760 and the air guide hole 761 and is respectively introduced into the interior of the flip rod 522. Finally, the oxygen flows through the air hole part 523 and is discharged to oxidize the iron in the NdFeB waste; the flipping motor 750 works and rotates the outer cylinder 720 and the hollow main shaft part 710 through the transmission of the gear transmission pair 740. The hollow main shaft part 710 drives the center seat 521 to rotate through the insert block 760, so that the multiple flipping rods 522 rotate with the center seat 521 and flip the NdFeB waste.

[0035] In one embodiment, Figure 2-6As shown, the rotating action part 420 has a rack near the bottom, at least one guide slide 410 is provided on the inner wall of the leaching tank 300, and the outer wall edge of the lower partition plate 510 has at least one convex seat 530 that slides with the guide slide 410; the roasting plate supporting component 800 includes a supporting shaft part 810 and a supporting arm 830, the supporting shaft part 810 is fixed to the bottom of the lower partition plate 510 through a support, and the end of the lower partition plate 510 is provided with a rotating gear part 820 The rotating gear portion 820 can mesh with the rack on the rotating action portion 420; one end of the supporting arm 830 is rotatably connected to the supporting shaft portion 810 and the other end is connected to the vertical movement driving component 900; in the embodiment of the present invention, the vertical movement driving component 900 acts on the supporting arm 830 and makes it move vertically. When the supporting arm 830 moves downward, the supporting arm 830 drives the baking tray 500 and the lower partition plate 510 to move downward through the supporting shaft portion 810. At this time, the convex seat 530 and the guide The slideway 410 is in a sliding state, and the lower partition plate 510 and the roasting plate 500 move downward smoothly; when the convex seat 530 and the guide slideway 410 are out of the sliding state, the rotating gear part 820 is just meshed with the rack of the rotating action part 420, and the rotating gear part 820 that continues to move downward drives the supporting shaft part 810 to rotate under the action of the rack, so the supporting shaft part 810 drives the lower partition plate 510 and the roasting plate 500 to rotate, so that the roasting plate 500 is in a tilted state inside the leaching tank 300, and the roasting plate 500 is tilted. 00, the NdFeB waste on the upper surface slides down and falls into the leaching tank 300; when the supporting arm 830 moves upward, the roasting plate 500 and the lower partition plate 510 gradually rotate from a vertical state to a horizontal state, and when the roasting plate 500 is in a horizontal state, the protrusion 530 and the guide slide 410 just contact and slide together, and the supporting arm 830 continues to move upward and drives the roasting plate 500 to enter the roasting furnace body 100 in a horizontal state, ensuring the sealing of the inner wall of the roasting furnace body 100 and the edge of the roasting plate 500.

[0036] In one embodiment, Figure 2-Figure 5As shown, a guide avoidance hole 430 is opened on the outer wall of the lower cylinder 400, and the supporting arm 830 passes through the guide avoidance hole 430 and vertically slides with the inner wall. The vertical movement driving component 900 includes a vertical movement screw rod 910, a vertical movement motor 920 and a screw sleeve part 930. The vertical movement screw rod 910 is rotatably arranged on the outer wall of the lower cylinder 400 and the top of the vertical movement screw rod 910 is connected to the output end of the vertical movement motor 920. The screw sleeve part 930 is fixed on the supporting arm 830 and extends It extends to the end of the outer wall of the lower cylinder 400 and the vertical moving screw rod 910 spirally penetrates the screw sleeve part 930; the vertical moving motor 920 works and drives the vertical moving screw rod 910 to rotate, and the rotating vertical moving screw rod 910 is spirally matched with the screw sleeve part 930 and the sliding restriction of the guide avoidance hole 430 and the supporting arm 830, so that the supporting arm 830 moves vertically, thereby enabling the roasting plate 500 to enter the roasting furnace body 100 and escape from the bottom port of the roasting furnace body 100, and quickly realize the discharge of materials.

[0037] In one embodiment, Figure 1-3 As shown, the bottom of the center seat 521 has a lower shaft portion 524 extending to the bottom of the lower partition plate 510, and the bottom end of the lower shaft portion 524 is provided with a toggle gear portion 525, the supporting shaft portion 810 is provided with two guide plates 840, and the guide plates 840 are fixedly connected to the ends of the supporting arms 830, the toggle gear portion 525 is located between the two guide plates 840, and the two guide plates 840 are provided with arc teeth 841 on the opposite surfaces; when the roasting plate 500 is in an inclined state and the convex seat 530 is disconnected from the guide slide 410, the 252 is alternately meshed with the two arc teeth 841; in the embodiment of the present invention When the rotating gear portion 820 is in meshing state with the rack on the rotating action portion 420, the baking tray 500, the lower partition plate 510 and the air outlet flip rod assembly 520 all rotate around the axis of the supporting shaft portion 810. At this time, the toggle gear portion 525 is alternately meshed with the two 541s. The two 541s can act on the toggle gear portion 525 to make the lower rotating shaft portion 524 rotate alternately forward and reverse. The lower rotating shaft portion 524 drives multiple flip rods 522 to rotate through the center seat 521, so that the flip rods 522 can toggle the NdFeB waste on the surface of the baking tray 500, and then the NdFeB waste can be fully and quickly separated from the surface of the lower partition plate 510.

[0038] In one embodiment, Figure 2-Figure 5As shown, the lower partition plate 510 is made of a heat-insulating material, and the outer diameter of the lower partition plate 510 is larger than the inner diameter of the roasting furnace body 100. In the embodiment of the present invention, the lower partition plate 510 made of a heat-insulating material can prevent the heat in the roasting furnace body 100 from being lost through the lower cylinder 400. At the same time, the lower partition plate 510 can seal the gap between the edge of the roasting plate 500 and the inner wall of the roasting furnace body 100, thereby preventing the NdFeB waste from falling through the gap between the edge of the roasting plate 500 and the inner wall of the roasting furnace body 100 during roasting.

[0039] In one embodiment, Figure 1 and Figure 7 As shown, at least one roasting gas outlet component 600 is further provided on the outside of the roasting furnace body 100, and the roasting gas outlet component 600 includes an gas outlet pipe 610 and a curved heat exchange pipe 640. One end of the gas outlet pipe 610 extends from the top of the roasting furnace body 100 to the inside of the roasting furnace body 100. The curved heat exchange pipe 640 is arranged inside the leaching tank body 300 and close to the inner wall of the leaching tank body 300. The lower end of the gas outlet pipe 610 is connected to the curved heat exchange pipe 640. In this embodiment of the present invention, the hot air generated inside the roasting furnace body 100 flows through the gas outlet pipe 610 and is introduced into the curved heat exchange pipe 640. The curved heat exchange pipe 640 exchanges heat with the rare earth element leaching solution inside the leaching tank body 300 to heat the rare earth element leaching solution.

[0040] In one embodiment, Figure 1 and Figure 7 As shown, a connecting pipe 620 is provided between the lower end of the air outlet pipe fitting 610 and the curved heat exchange tube 640, one end of the connecting pipe 620 is fixedly connected to the curved heat exchange tube 640, and the connecting pipe 620 and the end of the air outlet pipe fitting 610 away from the roasting furnace body 100 are detachably connected through a valve body connecting part 630; the valve body connecting part 630 is used to adjust the flow speed of the air flow inside the air outlet pipe fitting 610; in this embodiment of the present invention, the flow speed of the air flow inside the air outlet pipe fitting 610 is adjusted by the valve body connecting part 630, so that the internal air pressure of the roasting furnace body 100 can be controlled, and at the same time, by removing the valve body connecting part 630, the connection between the air outlet pipe fitting 610 and the connecting pipe 620 can be removed, so that the leaching tank body 300 can be moved out from the bottom of the roasting furnace body 100.

[0041] In one embodiment, Figure 1 and Figure 7As shown, the leaching tank body 300 is further provided with two symmetrical material receiving components, the material receiving components comprising a material receiving fixing rod 310 and a material receiving sleeve portion 320, the material receiving fixing rod 310 is fixed at a position close to the side wall inside the leaching tank body 300, the material receiving sleeve portion 320 is rotatably sleeved on the material receiving fixing rod 310, and the material receiving sleeve portion 320 and the material receiving fixing rod 310 are connected through a spring bearing, a material receiving plate 330 is provided on the material receiving sleeve portion 320, and a plurality of lower stirring rods 340 are provided on the side of the material receiving plate 330 away from the material receiving sleeve portion 320; in the embodiment of the present invention, the NdFeB waste material sliding off the surface of the roasting tray 500 will first fall on the surface of the material receiving plate 330 On the surface, due to the action of the clockwork bearing between the receiving sleeve portion 320 and the receiving fixed rod 310, the receiving plate 330 buffers the impact of the falling NdFeB waste by damping the downward rotation, and then the NdFeB waste slides into the leaching tank 300 along the receiving plate 330, which can effectively prevent the NdFeB waste from directly falling into the rare earth element leaching solution, thereby preventing the rare earth element leaching solution from splashing; at the same time, because of the impact of the falling NdFeB waste and the rotation of the NdFeB waste after sliding out, the receiving plate 330 can rotate relative to the receiving sleeve portion 320, and then the lower stirring rod 340 can stir the rare earth element leaching solution, so that it is in full contact with the NdFeB waste, thereby improving the rare earth element leaching effect.

[0042] The above embodiment provides an environmentally friendly recycling device for NdFeB waste, wherein the NdFeB waste is disposed inside the roasting furnace body 100 from the feed part 120 and the NdFeB waste falls on the upper surface of the roasting tray 500, and the multiple roasting heating parts 110 start to work and roast the NdFeB waste on the roasting tray 500. At this time, the bottom end of the air guide drive component 700 is connected to the center position of the air outlet turning rod assembly 520, and the air guide drive component 700 works and drives the air outlet turning rod assembly 520 to rotate relative to the roasting tray 500. The air outlet turning rod assembly 520 can move the NdFeB waste on the surface of the roasting tray 500 and The NdFeB waste is turned over, so that the NdFeB waste will not be concentrated in one place and the NdFeB waste can be evenly heated and roasted, and the gas guide drive component 700 also introduces oxygen flow to the gas outlet turning rod assembly 520, and the oxygen flow is discharged through the side of the gas outlet turning rod assembly 520, which can increase the contact surface between the oxygen flow and the NdFeB waste, and further increase the oxidation rate of iron; after the NdFeB waste is roasted, the gas guide drive component 700 and the roasting heating part 110 both stop working; the vertical drive component 900 starts to work and the vertical drive component 900 drives the roasting plate supporting component 800 to move downward, and the roasting plate supporting component 800 drives the lower partition plate 510 When the baking tray 500 moves downward, the lower partition plate 510 and the baking tray 500 always keep moving vertically downward due to the sliding cooperation between the lower partition plate 510 and the lower cylinder 400. When the baking tray 500 enters the lower cylinder 400 and the outer wall of the lower partition plate 510 is separated from the sliding connection with the inner wall of the lower cylinder 400, the rotating action part 420 acts on the baking tray supporting part 800 and drives the lower partition plate 510 to rotate around the connection between it and the baking tray supporting part 800 through the baking tray supporting part 800, and the baking tray 500 gradually rotates from a horizontal state to a vertical state, so that the baking tray 500 is rotated upward. The calcined NdFeB waste slides along the calcination plate 500 and falls into the leaching tank 300, and the NdFeB waste reacts with the rare earth element leaching solution in the leaching tank 300 to leach rare earths. During the leaching process, non-rare earth impurities are removed by adjusting the pH value and the aging time. Finally, the rare earth elements are separated from the rare earth element leaching solution by precipitation to complete the recovery and treatment of the NdFeB waste. Since the calcined NdFeB waste contains more heat, the temperature of the rare earth element leaching solution can be increased after falling into the leaching tank 300, which can reduce the resource loss of heating the rare earth element leaching solution.

[0043] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and 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 orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

Claims

1. An environmentally friendly recycling device for NdFeB waste, comprising a roasting furnace body (100), an outer frame body (200), a leaching tank body (300) and a roasting plate mechanism, wherein the roasting furnace body (100) and the leaching tank body (300) are both arranged on the roasting furnace body (100) and the roasting furnace body (100) is located on the upper side of the leaching tank body (300), a feeding part (120) is arranged on the top of the roasting furnace body (100), the roasting furnace body (100) is opened at the bottom and is provided with a lower cylinder (400), and a plurality of roasting heating parts (110) are provided on the inner wall of the roasting furnace body (100), characterized in that: The baking tray mechanism comprises a baking tray (500), an air guide driving component (700), a baking tray supporting component (800) and a vertical movement driving component (900); The baking tray (500) is arranged inside the baking furnace body (100) and can be removed from the bottom opening; a lower partition member (510) located inside the lower cylinder (400) is arranged at the bottom of the baking tray (500), and the outer wall of the baking tray (500) is slidably matched with the inner wall of the lower cylinder (400) near the baking furnace body (100); The baking tray supporting component (800) is arranged at the bottom of the lower cylinder (400), and one end of the baking tray supporting component (800) is slidably matched with the inner wall of the lower cylinder (400) along its axial direction; the baking tray supporting component (800) is connected to a vertical movement driving component (900) arranged on the outer wall of the baking furnace body (100), and the vertical movement driving component (900) is used to drive the baking tray supporting component (800) to move vertically; a rotating action part (420) is also arranged inside the lower cylinder (400), and the rotating action part (420) is connected to the baking tray supporting component (800); When the lower partition plate (510) is separated from the sliding fit with the inner wall of the lower cylinder (400), the rotation action part (420) can act on the baking tray supporting component (800) and cause the lower partition plate (510) to rotate through the baking tray supporting component (800); The upper surface of the baking tray (500) is also provided with a gas outlet turning rod assembly (520) whose center is rotatably connected to the center of the baking tray (500); the gas guide driving component (700) is arranged inside the baking furnace body (100) and the top of the gas guide driving component (700) is connected to the top wall of the baking furnace body (100); the bottom of the gas guide driving component (700) can be detachably connected to the center position of the gas outlet turning rod assembly (520) inside the baking furnace body (100); When the air guide driving component (700) is connected to the air outlet flap assembly (520), the air guide driving component (700) can drive the air outlet flap assembly (520) to rotate and introduce an oxygen flow into the interior of the air outlet flap assembly (520).

2. The environmentally friendly recycling equipment for NdFeB waste according to claim 1, characterized in that: The air outlet flip rod assembly (520) comprises a central seat (521) and a plurality of flip rods (522); The center seat (521) is rotatably arranged on the upper surface of the baking tray (500), and a socket for connecting to the bottom of the air guide drive component (700) is provided at the center of the center seat (521). A plurality of flip rods (522) are circumferentially distributed outside the center seat (521), and one end of the flip rod (522) is fixedly connected to the outer wall of the center seat (521). The outer wall of the flip rod (522) has a plurality of air holes (523), and the inside of the flip rod (522) is connected to the center seat (521).

3. The environmentally friendly recycling equipment for NdFeB waste according to claim 2, characterized in that: The air-guiding driving component (700) comprises a hollow main shaft portion (710), an outer cylinder (720), an air injection portion (730) and a flipping motor (750); The hollow main shaft portion (710) is disposed inside the roasting furnace body (100), and the top of the hollow main shaft portion (710) is rotatably connected to the top wall of the roasting furnace body (100) via the outer cylinder (720); the flipping motor (750) is disposed at the top of the roasting furnace body (100), and the output end of the flipping motor (750) is connected to the outer cylinder (720) via a gear transmission pair (740); The gas injection portion (730) is arranged at the top of the outer cylinder (720), and the gas outlet end of the gas injection portion (730) is connected to the inside of the hollow main shaft portion (710). The bottom of the hollow main shaft portion (710) has an insert block portion (760) that can be inserted into the socket, and the outer wall of the insert block portion (760) has an air guide hole (761) that can be connected to the flip rod (522).

4. The environmentally friendly recycling equipment for NdFeB waste according to claim 2, characterized in that: The rotating action part (420) has a rack near the bottom, the inner wall of the leaching tank (300) is provided with at least one guide slideway (410), and the outer wall edge of the lower partition plate (510) has at least one convex seat (530) that slidably cooperates with the guide slideway (410); The baking tray supporting component (800) comprises a supporting shaft portion (810) and a supporting arm (830); the supporting shaft portion (810) is fixed to the bottom of the lower partition plate (510) via a support; a rotating gear portion (820) is provided at the end of the lower partition plate (510), and the rotating gear portion (820) is capable of meshing with a rack on the rotating action portion (420); One end of the supporting arm (830) is rotatably connected to the supporting shaft portion (810), and the other end is connected to the vertical movement driving component (900).

5. The environmentally friendly recycling equipment for NdFeB waste according to claim 4, characterized in that: A guide avoidance hole (430) is provided on the outer wall of the lower cylinder (400), and the supporting arm (830) passes through the guide avoidance hole (430) and vertically slides with the inner wall; The vertical movement driving component (900) comprises a vertical movement screw rod (910), a vertical movement motor (920) and a screw sleeve portion (930); The vertical moving screw rod (910) is rotatably arranged on the outer wall of the lower cylinder (400), and the top of the vertical moving screw rod (910) is connected to the output end of the vertical moving motor (920), and the screw sleeve portion (930) is fixed to the end of the supporting arm (830) extending to the outer wall of the lower cylinder (400), and the vertical moving screw rod (910) spirally penetrates the screw sleeve portion (930).

6. The environmentally friendly recycling equipment for NdFeB waste according to claim 4, characterized in that: The bottom of the central seat (521) has a lower rotating shaft portion (524) extending to the bottom of the lower partition plate (510), and a shifting gear portion (525) is provided at the bottom end of the lower rotating shaft portion (524); Two guide plates (840) are provided on the supporting shaft portion (810), and the guide plates (840) are fixedly connected to the end of the supporting arm (830); the shifting gear portion (525) is located between the two guide plates (840), and arc teeth (841) are provided on the opposite surfaces of the two guide plates (840); When the baking tray (500) is in a tilted state and the convex seat (530) is disconnected from the guide slideway (410), the (252) is alternately meshed with the two arc-shaped teeth (841).

7. The environmentally friendly recycling equipment for NdFeB waste according to claim 1, characterized in that: The lower partition plate (510) is made of a heat-insulating material, and the outer diameter of the lower partition plate (510) is greater than the inner diameter of the roasting furnace body (100).

8. The environmentally friendly recycling equipment for NdFeB waste according to claim 1, characterized in that: At least one roasting gas outlet component (600) is further provided on the outside of the roasting furnace body (100); The roasting gas outlet component (600) comprises a gas outlet pipe (610) and a curved heat exchange pipe (640); one end of the gas outlet pipe (610) extends from the top of the roasting furnace body (100) to the inside of the roasting furnace body (100); the curved heat exchange pipe (640) is arranged inside the leaching tank body (300) and close to the inner wall of the leaching tank body (300); and the lower end of the gas outlet pipe (610) is connected to the curved heat exchange pipe (640).

9. The environmentally friendly recycling equipment for NdFeB waste according to claim 8, characterized in that: A connecting pipe (620) is provided between the lower end of the air outlet pipe member (610) and the curved heat exchange pipe (640); One end of the connecting pipe (620) is fixedly connected to the curved heat exchange pipe (640), and the connecting pipe (620) and the end of the air outlet pipe member (610) away from the roasting furnace body (100) are detachably connected via a valve body connecting portion (630); the valve body connecting portion (630) is used to adjust the flow speed of the airflow inside the air outlet pipe member (610).

10. The environmentally friendly recycling equipment for NdFeB waste according to any one of claims 1 to 9, characterized in that: Two symmetrical material receiving assemblies are also arranged inside the leaching tank body (300), and the material receiving assemblies include a material receiving fixing rod (310) and a material receiving sleeve portion (320); The material receiving fixed rod (310) is fixed at a position close to the side wall inside the leaching tank body (300), the material receiving sleeve portion (320) is rotatably sleeved on the material receiving fixed rod (310), and the material receiving sleeve portion (320) and the material receiving fixed rod (310) are connected via a spring bearing, a material receiving plate (330) is provided on the material receiving sleeve portion (320), and a plurality of lower stirring rods (340) are provided on the side of the material receiving plate (330) away from the material receiving sleeve portion (320).

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