Segmented praseodymium neodymium oxide recovery device for rare earth

Abstract

The invention relates to the technical field of rare earth recovery and comprehensive utilization, and discloses a segmented praseodymium neodymium oxide recovery device for rare earth, which comprises a bottom coaming, a grinding ring, a central rotating shaft, a rotating disc, a fixed roller, a grinding roller mechanism, a rotating shovel plate mechanism and an upward throwing sieve plate mechanism. The key defects of a traditional Raymond mill in material circulation and granularity control are overcome, a sliding shaft and sliding block structure in threaded engagement is in linkage with a rotating wheel connecting rod, the angle of a scraper knife can be dynamically adjusted in the operation process, a bent knife with hard alloy and an anti-overflow baffle are combined, the cutting-in capacity of viscous or superfine materials is greatly improved, and the service life of the scraper knife is prolonged. The problem that a traditional fixed scraper knife is prone to slippage and adhesion of materials is solved, ineffective grinding energy consumption caused by insufficient shoveled materials can be remarkably reduced through mechanical self-adaptive adjustment and compensation of abrasion gaps, meanwhile, shoveling wind resistance is reduced through the curved surface design of the bent knife, the lifting height of the materials is increased, and it is ensured that the materials can be accurately thrown to a grinding roller grinding area.

Description

Technical Field

[0001] The present invention relates to the technical field of rare earth recovery and comprehensive utilization, and more particularly to a device for segmented recovery of praseodymium-neodymium oxide for rare earths. Background Art

[0002] Raymond mill is a kind of equipment used for high-fine powder processing of more than 280 kinds of materials in the mining, chemical, construction and other industries. When working, the material to be crushed is added into the machine from the feed hopper on the side of the machine cover. The grinding roller device, which is suspended on the plum blossom frame of the main machine, revolves around the vertical axis and rotates at the same time. Due to the centrifugal force during rotation, the grinding roller swings outward and presses against the grinding ring, so that the scraper scoops up the material and sends it between the grinding roller and the grinding ring. The rolling and crushing of the grinding roller achieves the purpose of crushing the material: The scraping mechanism of traditional Raymond mill relies on fixed-angle scrapers to passively lift the material. For some materials with high humidity and strong viscosity, it is very easy to cause the material to stick to the scraper, that is, the material accumulates on the scraper. In severe cases, the material will accumulate on the chassis and cannot be effectively fed into the grinding area for grinding. Moreover, after being ground by the rollers of traditional Raymond mills, the coarse particles that do not meet the standards naturally fall back to the bottom plate due to gravity, and will be mixed with qualified fine powder for secondary circulation grinding again. This will not only increase the energy consumption of grinding, but also make it impossible to grind the coarse particles again in a targeted manner, resulting in a large discrete particle size of the finished product, especially for some rare earth minerals, the stratified recovery efficiency is lower. Summary of the Invention

[0003] In order to overcome the above-mentioned defects of the prior art, the present invention provides a device for segmented recovery of praseodymium-neodymium oxide for rare earths to solve the problems existing in the above-mentioned background technology.

[0004] The present invention provides the following technical solution: a device for segmented recovery of praseodymium-neodymium oxide from rare earths, comprising a bottom enclosure plate, a grinding ring, and a central rotating shaft, wherein the interior of the bottom enclosure plate is fixedly connected to the grinding ring, the interior center of the bottom enclosure plate is fixedly connected to the central rotating shaft, a rotating disk is provided on the outside of the central rotating shaft and the top of the bottom enclosure plate, a fixed roller is fixedly connected to the outer circumferential side of the rotating disk, a limiting rod is fixedly connected to the outer side of the rotating disk and the inner side of the fixed roller, a grinding roller mechanism is fixedly connected to the outer side of the rotating disk and the inner side of the fixed roller, a rotating shovel mechanism is provided on the interior of the bottom enclosure plate in a circumferential direction, and an upward throwing screen mechanism is fixedly connected to the other side of the rotating shovel mechanism; Furthermore, the device is the main part of the Raymond mill. When the Raymond mill is started, the central shaft is driven by the motor to rotate, together with the rotating disk and bottom plate thereon. The rotating disk rotates around the center so that the grinding roller mechanism thereon also rotates along the grinding ring. At the same time, the bottom plate also rotates. The rotating shovel mechanism thereon will scoop up the materials scattered inside the bottom plate and send them to the junction of the grinding ring and the grinding roller mechanism for shearing and grinding.

[0005] Furthermore, the grinding roller mechanism includes a circular shaft fixedly connected to the outer side of the rotating disk and the inner side of the limiting rod, an upper wheel is provided on the outer side of the circular shaft and the top of the rotating disk, a lower wheel is fixedly connected to the outer side of the circular shaft near the bottom of the rotating disk, and a grinding rod is fixedly connected to the bottom of the lower wheel and the outer side of the circular shaft.

[0006] Furthermore, the circular shaft is fixed to the rotating disk through a fixed roller and a limiting rod, and can rotate synchronously with the rotation of the rotating disk, and the grinding rod and the grinding ring thereunder are in uniform contact for grinding.

[0007] Furthermore, the rotating shovel mechanism includes a fixed plate fixedly connected to the bottom panel, the other side of the fixed plate is fixedly connected to a connecting shaft, the other side of the connecting shaft is fixedly connected to a support plate, the top of the support plate is fixedly connected to a fixed seat 2 close to the fixed plate, one side of the fixed seat 2 is rotatably connected to the shovel mechanism through a rod, the other side of the fixed seat 2 is fixedly connected to a sliding frame mechanism, and both sides of the sliding frame mechanism are rotatably connected to telescopic rods.

[0008] Furthermore, the sliding frame mechanism includes a fixed seat 1 fixedly connected to the top of the support plate and evenly distributed on the other side of the fixed seat 2, the fixed seat 1 is fixedly connected to a slide groove inside, the slide groove is rotatably connected to a sliding shaft, the outside of the sliding shaft and the inside of the slide groove are fixedly connected to a slider, the two sides of the slider and the inside of the slide groove are rotatably connected to a large rotating wheel through an axis, the outer side of the large rotating wheel and the outer side of the slide groove are rotatably connected to a small rotating wheel through the same axis, the inner side of the small rotating wheel is rotatably connected to a telescopic rod, and the other side of the telescopic rod is rotatably connected to rotating frame 1, the inner side of the fixed seat 2 is fixedly connected to rotating frame 2, and the outer side of the rotating frame 1 and the outer side of the rotating frame 2 are rotatably connected to a scraper mechanism.

[0009] Furthermore, the bottom enclosure plate and the central rotating shaft will rotate synchronously, and the bottom enclosure plate is fixedly connected with a rotating shovel plate mechanism and an upper throwing screen plate mechanism that are evenly distributed along the circumference. The material that has not been ground in place will fall back to the inner bottom surface of the bottom enclosure plate, be scooped up by the shovel plate mechanism, and then return to the grinding rod for repeated grinding. According to the hardness, humidity and easy grinding degree of the grinding material, a rotating shovel plate mechanism structure with adjustable angle is provided. By rotating the outer turntable, the sliding shaft and the slider are engaged through threads, and the slider will move along the sliding shaft toward the side close to the fixed seat 2. Large and small wheels are provided on both sides of the slider to make it slide smoothly along the sliding shaft. The small and large wheels are connected by a telescopic rod in the middle. The required angle can be dynamically adjusted during the sliding process to adapt to different materials so that it can better shovel the material for further grinding.

[0010] Furthermore, the scraper mechanism includes a rotating plate rotatably connected to the outside of rotating frame 1 and the outside of rotating frame 2, a curved blade is fixedly connected to the side of the rotating plate close to the bottom, and a baffle is fixedly connected to the side of the rotating plate away from the fixed plate.

[0011] The top of the supporting plate is fixedly connected to a symmetrical sliding bracket on a side away from the fixed plate, the inner top of the sliding bracket is fixedly connected to a spring, the inner surface of the sliding bracket is fixedly connected to a convex plate, the outer side of the convex plate and the top of the spring are provided with a special-shaped slider, the top inner side of the special-shaped slider is rotatably connected to a round rod, the outer middle part of the round rod is fixedly connected to a rotating block, the outer side of the sliding bracket and the two ends of the round rod are fixedly connected to a small rotating rod, the other end of the small rotating rod is rotatably connected to a large rotating rod, and the other end of the large rotating rod is fixedly connected to an inner rotating disk through the sliding bracket, and the inner rotating disk is fixedly connected to a sieve plate on the side close to the fixed plate.

[0012] Furthermore, a throwing screen plate mechanism is provided on the side of the support plate close to the rotating shovel plate mechanism, and the rotating block is provided with a reciprocating motor. When it rotates toward the side away from the sieve plate, small rotating rods are fixedly connected on both sides of the round rod. The rotation of the small rotating rod will drive the large rotating rod connected thereto to rotate. The inner side of the large rotating rod is fixedly connected to an inner turntable, and the inner turntable is fixedly connected to the sieve plate. During the rotation of the round rod, the sieve plate will be driven to rotate at the same angle. During the rotation, the sieve plate will filter the ground material, collect larger pieces of gravel on the sieve plate, and through the rotation of the round rod, these gravel will be thrown up again to the grinding rod for grinding again, which can greatly improve the grinding efficiency of the single rotating shovel plate mechanism structure.

[0013] The technical effects and advantages of the present invention are as follows: The present invention is beneficial to the key defects of traditional Raymond mill in material circulation and particle size control by providing a rotating shovel plate mechanism. The threaded sliding shaft slider structure is linked to the runner connecting rod, so that the shovel blade angle can be dynamically adjusted during operation. Combined with the curved blade with carbide and the anti-overflow baffle, it not only greatly improves the cutting ability of sticky or ultra-fine materials, avoids the problems of material slippage and adhesion that are prone to occur with traditional fixed scrapers, but also compensates for wear gaps through mechanical adaptive adjustment, significantly reducing the ineffective grinding energy consumption caused by insufficient shoveling material. At the same time, the curved surface design of the curved blade reduces the wind resistance of the shoveling material, increases the material conveying height, and ensures that it can be accurately thrown into the grinding area of ​​the grinding roller.

[0014] The present invention is provided with an upward-throwing screen plate mechanism, which deeply integrates the screening function with the active throwing through the crank rocker principle, and utilizes the inertial vibration of the screen plate during reciprocating rotation to realize real-time classification of the falling material: qualified fine powder is taken away by the negative pressure airflow, and substandard coarse particles are intercepted by the screen plate and actively thrown back to the grinding area with the overturning action of the inner turntable. This can avoid the excessive grinding caused by the repeated falling of coarse particles back to the bottom plate in the traditional Raymond mill, thereby reducing the consumption of capacity. The mechanical forced back-throwing shortens the coarse particle recycling path, thereby improving the grinding efficiency, solving the problem of discrete particle size distribution of some rare earth minerals due to uneven hardness, and improving the recovery efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0016] Figure 2 This is a schematic diagram of the overall structure of the present invention without the periphery.

[0017] Figure 3 It is a schematic diagram of the structure of the grinding ring of the present invention.

[0018] Figure 4 It is a schematic structural diagram of the grinding roller mechanism of the present invention.

[0019] Figure 5 It is a schematic diagram of the rotating shovel mechanism and the central shaft structure of the present invention.

[0020] Figure 6 It is a structural schematic diagram of the support plate of the present invention.

[0021] Figure 7 It is a schematic structural diagram of the sliding frame mechanism of the present invention.

[0022] Figure 8 It is a side view of the sliding frame mechanism of the present invention.

[0023] Figure 9 It is a schematic structural diagram of the scraper mechanism of the present invention.

[0024] Figure 10 It is a structural schematic diagram of the upward-throwing screen plate mechanism of the present invention.

[0025] The accompanying drawings are marked as follows: 1, bottom plate; 2, grinding ring; 3, central rotating shaft; 4, grinding roller mechanism; 41, circular shaft; 42, upper wheel; 43, lower wheel; 44, grinding rod; 5, fixed roller; 6, limiting rod; 7, rotating shovel mechanism; 71, supporting plate; 72, fixed plate; 73, connecting shaft; 74, shovel mechanism; 741, rotating plate; 742, curved blade; 743, baffle; 75, telescopic rod; 76, sliding frame mechanism; 761, slide groove; 762, Slider; 763, sliding shaft; 764, fixed seat one; 765, rotating frame one; 766, small turntable; 767, large turntable; 768, outer turntable; 77, fixed seat two; 771, rotating frame two; 8, upper screen plate mechanism; 81, screen plate; 82, sliding bracket; 821, special-shaped slider; 83, rotating block; 84, small rotating rod; 85, spring; 86, large rotating rod; 87, convex plate; 88, round rod; 89, inner turntable; 9, rotating disk. DETAILED DESCRIPTION

[0026] The technical solutions of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. In addition, the forms of the various structures described in the following embodiments are merely examples. The device for segmented recovery of praseodymium-neodymium oxide for rare earths involved in the present invention is not limited to the various structures described in the following embodiments. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Reference Figure 1 and Figure 2 The present invention provides a device for segmented recovery of praseodymium-neodymium oxide for rare earths, comprising a bottom enclosure plate 1, a grinding ring 2 and a central rotating shaft 3. The grinding ring 2 is fixedly connected to the interior of the bottom enclosure plate 1, the central rotating shaft 3 is fixedly connected to the center of the inner portion of the bottom enclosure plate 1, a rotating disk 9 is provided on the outer side of the central rotating shaft 3 and the top of the bottom enclosure plate 1, a fixed roller 5 is fixedly connected to the outer side of the rotating disk 9 in a circumferential direction, a limiting rod 6 is fixedly connected to the outer side of the rotating disk 9 and the inner side of the fixed roller 5, a grinding roller mechanism 4 is fixedly connected to the outer side of the rotating disk 9 and the inner side of the fixed roller 5, a rotating shovel mechanism 7 is provided circumferentially inside the bottom enclosure plate 1, and an upper throwing screen mechanism 8 is fixedly connected to the other side of the rotating shovel mechanism 7; Reference Figure 2 and Figure 3 This device is the main part of the Raymond mill. When the Raymond mill is started, the central rotating shaft 3 is driven by the motor to rotate, together with the rotating disk 9 and the bottom plate 1 on it. The rotating disk 9 rotates around the center, causing the grinding roller mechanism 4 on it to rotate along the grinding ring 2. At the same time, the bottom plate 1 will also rotate. The rotating shovel mechanism 7 on it will scoop up the materials scattered inside the bottom plate 1 and send them to the junction of the grinding ring 2 and the grinding roller mechanism 4 for shearing and grinding.

[0028] Reference Figure 4 The grinding roller mechanism 4 includes a circular shaft 41 fixedly connected to the outer side of the rotating disk 9 and the inner side of the limiting rod 6, an upper wheel 42 is provided on the outer side of the circular shaft 41 and the top of the rotating disk 9, a lower wheel 43 is fixedly connected to the outer side of the circular shaft 41 near the bottom of the rotating disk 9, and a grinding rod 44 is fixedly connected to the bottom of the lower wheel 43 and the outer side of the circular shaft 41.

[0029] Reference Figure 4 The circular shaft 41 is fixed on the rotating disk 9 through the fixed roller 5 and the limit rod 6, and can rotate synchronously with the rotation of the rotating disk 9. The grinding rod 44 below it is in uniform contact with the grinding ring 2 for grinding.

[0030] Reference Figure 5 and Figure 6 The rotating shovel mechanism 7 includes a fixed plate 72 fixedly connected to the bottom panel 1, the other side of the fixed plate 72 is fixedly connected to a connecting shaft 73, the other side of the connecting shaft 73 is fixedly connected to a support plate 71, the top of the support plate 71 is fixedly connected to a fixed seat 2 77 close to the fixed plate 72, one side of the fixed seat 2 77 is rotatably connected to a shovel mechanism 74 through a rod, the other side of the fixed seat 2 77 is fixedly connected to a sliding frame mechanism 76, and both sides of the sliding frame mechanism 76 are rotatably connected to telescopic rods 75.

[0031] Reference Figure 8 The sliding frame mechanism 76 includes a fixed seat 1 764 fixedly connected to the top of the support plate 71 and evenly distributed on the other side of the fixed seat 2 77. The interior of the fixed seat 1 764 is fixedly connected to the slide groove 761, and the interior of the slide groove 761 is rotatably connected to the slide shaft 763. The outside of the slide shaft 763 and the interior of the slide groove 761 are fixedly connected to the slider 762. The two sides of the slider 762 and the interior of the slide groove 761 are rotatably connected to the large rotating wheel 767 through the axis. The outer side of the large rotating wheel 767 and the outer side of the slide groove 761 are rotatably connected to the small rotating wheel 766 through the same axis. The inner side of the small rotating wheel 766 is rotatably connected to the telescopic rod 75, and the other side of the telescopic rod 75 is rotatably connected to the rotating frame 1 765. The inner side of the fixed seat 2 77 is fixedly connected to the rotating frame 2 771, and the outer side of the rotating frame 1 765 and the outer side of the rotating frame 2 771 are rotatably connected to the scraper mechanism 74.

[0032] Reference Figure 5 and Figure 6The bottom panel 1 and the central rotating shaft 3 will rotate synchronously. The bottom panel 1 is fixedly connected with a rotating shovel mechanism 7 and an upper throwing screen mechanism 8 evenly distributed along the circumference. The material that has not been ground in place will fall back to the inner bottom surface of the bottom panel 1 and be scooped up by the scraper mechanism 74 and then returned to the grinding rod 44 for repeated grinding. According to the hardness, humidity and grinding ease of the grinding material, a rotating shovel mechanism 7 structure with adjustable angle is provided. By rotating the outer turntable 768, the sliding shaft 763 and the slider 762 are threadedly engaged, and the slider 762 will move along the sliding shaft 763 toward the side close to the fixed seat 2 77. Large wheels 767 and small wheels 766 are provided on both sides of the slider 762, so that it slides smoothly along the sliding shaft 763. The small wheel 766 and the large wheel 767 are rotatably connected with the telescopic rod 75. The required angle can be dynamically adjusted during the sliding process to adapt to different materials so that it can better scoop up the material for re-grinding.

[0033] Reference Figure 9 The scraper mechanism 74 includes a rotating plate 741 rotatably connected to the outside of the rotating frame 1 765 and the outside of the rotating frame 2 771. A curved blade 742 is fixedly connected to the side of the rotating plate 741 close to the bottom, and a baffle 743 is fixedly connected to the side of the rotating plate 741 away from the fixed plate 72.

[0034] Reference Figure 10 The top of the support plate 71 is fixedly connected to a symmetrical sliding bracket 82 on one side away from the fixed plate 72, and the inner top of the sliding bracket 82 is fixedly connected to a spring 85. The inner surface of the sliding bracket 82 is fixedly connected to a convex plate 87, and the outer side of the convex plate 87 and the top of the spring 85 are provided with a special-shaped slider 821. The inner side of the top of the special-shaped slider 821 is rotatably connected to a round rod 88, and the middle part of the outer side of the round rod 88 is fixedly connected to a rotating block 83. The outer side of the sliding bracket 82 and the two ends of the round rod 88 are fixedly connected to a small rotating rod 84, and the other end of the small rotating rod 84 is rotatably connected to a large rotating rod 86. The other end of the large rotating rod 86 passes through the sliding bracket 82 and is fixedly connected to an inner turntable 89. The side of the inner turntable 89 close to the fixed plate 72 is fixedly connected to the sieve plate 81.

[0035] Reference Figure 10The sieve plate 81 is fixedly connected to the grinding rod 44 for grinding again, which can greatly improve the grinding efficiency of the single rotating shovel plate mechanism 7.

[0036] The working principle of the present invention is as follows: the device is the main part of the Raymond mill. When the Raymond mill is turned on, the central rotating shaft 3 is driven by the motor to rotate, together with the rotating disk 9 and the bottom plate 1 thereon. The rotating disk 9 rotates around the center so that the grinding roller mechanism 4 thereon also rotates along the grinding ring 2. At the same time, the bottom plate 1 also rotates. The rotating shovel mechanism 7 thereon will scoop up the materials scattered inside the bottom plate 1 and send them to the junction of the grinding ring 2 and the grinding roller mechanism 4 for shearing and grinding. The circular shaft 41 is fixed to the rotating disk 9 by the fixed roller 5 and the limit rod 6, and can be synchronized with the rotation of the rotating disk 9. The grinding rod 44 below it is in uniform contact with the grinding ring 2 for grinding, and the bottom panel 1 and the central shaft 3 will rotate synchronously. The bottom panel 1 is fixedly connected with a rotating shovel mechanism 7 and an upper throwing screen mechanism 8 evenly distributed along the circumference. The material that has not been ground in place will fall back to the inner bottom surface of the bottom panel 1 and be scooped up by the scraper mechanism 74 and then returned to the grinding rod 44 for repeated grinding. According to the hardness, humidity and easy grinding degree of the grinding material, a rotating shovel mechanism 7 structure with adjustable angle is set. By rotating the outer turntable 768, the sliding shaft 763 and the slider 762 are engaged through threads. The slider 762 will move along the sliding shaft 763 toward the side close to the fixed seat 2 77. A large rotating wheel 767 and a small rotating wheel 766 are provided on both sides of the slider 762 to make it slide smoothly along the sliding shaft 763. The small rotating wheel 766 and the large rotating wheel 767 are connected to the telescopic rod 75 in the middle. The required angle can be dynamically adjusted during the sliding process to adapt to different materials so that it can better scoop up the materials for re-grinding. A throwing screen plate mechanism 8 is also provided on the side of the support plate 71 close to the rotating shovel plate mechanism 7. The rotating block 83 is provided with a reciprocating motor. When it rotates toward the side away from the screen plate 81, Small rotating rods 84 are fixedly connected to both sides of the round rod 88. The rotation of the small rotating rod 84 will drive the large rotating rod 86 connected thereto to rotate. The inner side of the large rotating rod 86 is fixedly connected to the inner turntable 89, and the inner turntable 89 is fixedly connected to the sieve plate 81. During the rotation of the round rod 88, the sieve plate 81 will be driven to rotate at the same angle. During the rotation, the sieve plate 81 will filter the ground material, collect larger pieces of gravel on the sieve plate 81, and through the rotation of the round rod 88, these gravel will be thrown onto the grinding rod 44 for another grinding, which can greatly improve the grinding efficiency of the single-rotating shovel plate mechanism 7 structure.

[0037] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A device for recovering praseodymium-neodymium oxide in stages for rare earth, comprising a bottom plate (1), a grinding ring (2) and a central rotating shaft (3), characterized in that: The interior of the bottom enclosure (1) is fixedly connected to a grinding ring (2), the interior center of the bottom enclosure (1) is fixedly connected to a central rotating shaft (3), a rotating disk (9) is provided on the outer side of the central rotating shaft (3) and the top of the bottom enclosure (1), the outer side of the rotating disk (9) is fixedly connected to a fixed roller (5), the outer side of the rotating disk (9) and the inner side of the fixed roller (5) are fixedly connected to a limiting rod (6), the outer side of the rotating disk (9) and the inner side of the fixed roller (5) are fixedly connected to a grinding roller mechanism (4), the interior of the bottom enclosure (1) is provided with a rotating shovel mechanism (7) circumferentially, and the other side of the rotating shovel mechanism (7) is fixedly connected to an upward throwing screen mechanism (8).

2. The device for segmented recovery of praseodymium-neodymium oxide from rare earths according to claim 1, characterized in that: The grinding roller mechanism (4) comprises a circular shaft (41) fixedly connected to the outer side of the rotating disk (9) and the inner side of the limiting rod (6); an upper wheel (42) is provided on the outer side of the circular shaft (41) and the top of the rotating disk (9); a lower wheel (43) is fixedly connected to the outer side of the circular shaft (41) near the bottom of the rotating disk (9); and a grinding rod (44) is fixedly connected to the bottom of the lower wheel (43) and the outer side of the circular shaft (41).

3. The device for segmented recovery of praseodymium-neodymium oxide from rare earths according to claim 1, characterized in that: The rotating shovel mechanism (7) includes a fixed plate (72) fixedly connected to the bottom enclosure plate (1), the other side of the fixed plate (72) is fixedly connected to a connecting shaft (73), the other side of the connecting shaft (73) is fixedly connected to a support plate (71), the top of the support plate (71) is fixedly connected to a fixed seat 2 (77) on a side close to the fixed plate (72), one side of the fixed seat 2 (77) is rotatably connected to a shovel mechanism (74) through a rod, the other side of the fixed seat 2 (77) is fixedly connected to a sliding frame mechanism (76), and both sides of the sliding frame mechanism (76) are rotatably connected to telescopic rods (75).

4. The device for segmented recovery of praseodymium-neodymium oxide from rare earths according to claim 3, characterized in that: The sliding frame mechanism (76) includes a fixed seat 1 (764) fixedly connected to the top of the support plate (71) and evenly distributed on the other side of the fixed seat 2 (77), the interior of the fixed seat 1 (764) is fixedly connected to a slide groove (761), the interior of the slide groove (761) is rotatably connected to a slide shaft (763), the exterior of the slide shaft (763) and the interior of the slide groove (761) are fixedly connected to a slider (762), both sides of the slider (762) and the interior of the slide groove (761) are rotatably connected to a large rotating wheel (767), the outer side of the large rotating wheel (767) and the outer side of the slide groove (761) are rotatably connected to a small rotating wheel (766) via the same axis, and the inner side of the small rotating wheel (766) is rotatably connected to a telescopic rod (75).

5. The device for segmented recovery of praseodymium-neodymium oxide from rare earths according to claim 4, characterized in that: The other side of the telescopic rod (75) is rotatably connected to the rotating frame 1 (765), the inner side of the fixed seat 2 (77) is fixedly connected to the rotating frame 2 (771), and the outer sides of the rotating frame 1 (765) and the rotating frame 2 (771) are rotatably connected to the scraper mechanism (74).

6. The device for segmented recovery of praseodymium-neodymium oxide from rare earths according to claim 5, characterized in that: The scraper mechanism (74) includes a rotating plate (741) rotatably connected to the outside of the rotating frame 1 (765) and the outside of the rotating frame 2 (771), a curved blade (742) being fixedly connected to a side of the rotating plate (741) close to the bottom, and a baffle (743) being fixedly connected to a side of the rotating plate (741) away from the fixed plate (72).

7. The device for segmented recovery of praseodymium-neodymium oxide from rare earths according to claim 4, characterized in that: A symmetrical sliding bracket (82) is fixedly connected to the top of the support plate (71) away from the fixed plate (72), a spring (85) is fixedly connected to the inner top of the sliding bracket (82), a convex plate (87) is fixedly connected to the inner surface of the sliding bracket (82), a special-shaped slider (821) is provided on the outer side of the convex plate (87) and the top of the spring (85), a round rod (88) is rotatably connected to the inner side of the top of the special-shaped slider (821), a rotating block (83) is fixedly connected to the middle part of the outer side of the round rod (88), a small rotating rod (84) is fixedly connected to the outer side of the sliding bracket (82) and the two ends of the round rod (88), the other end of the small rotating rod (84) is rotatably connected to the large rotating rod (86), the other end of the large rotating rod (86) passes through the sliding bracket (82) and is fixedly connected to the inner rotating disk (89), and the side of the inner rotating disk (89) close to the fixed plate (72) is fixedly connected to the sieve plate (81).

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