Magnetic separation device for reducing lithium content in lepidolite mineral separation tail mud

Abstract

The invention discloses a magnetic separation device for reducing the lithium content in lepidolite mineral separation tail mud, and relates to the technical field of mineral separation tail mud magnetic separation treatment. The magnetic separation device for reducing the lithium content in the lepidolite mineral separation tail mud comprises a base, a separation piece for solid-liquid separation of the tail mud is installed on the left portion of the upper end face of the base, and a first magnetic separation mechanism for tail mud solid and a second magnetic separation mechanism for liquid are sequentially installed on the right portion of the upper end face of the base from top to bottom. Through cooperation of the protruding steps on the conveying belt on the separation part and the magnetic separation mechanism, when large slime is conveyed, the steps descend, and when small tail mud is conveyed, the steps are in situ, so that the magnetic tail mud is fully sucked to a ring body on the magnetic separation mechanism. And through cooperation of the speed changing unit and the stopping assembly, the ring body pauses and accelerates the rotating speed every time the ring body moves forwards by a certain distance, tail mud of different sizes is screened into the storage box through centrifugal force, and the dual functions of magnetic separation and screening are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of magnetic separation treatment of ore tailings, in particular to a magnetic separation device for reducing the lithium content in lepidolite ore dressing tailings. Background Art

[0002] Lepidolite, also known as "lepidolite", is a mineral with important industrial value. Lepidolite is one of the main raw materials for extracting rare metal lithium. Lepidolite can also be used as a flux for glass raw materials and ceramics. The processing of lepidolite usually includes steps such as crushing, grinding, flotation or magnetic separation. After crushing and grinding, the ore will form smaller particles and powders. These particles and powders contain lepidolite sludge and the original sludge constitutes the mica tailings. These sludges have a great influence on the flotation efficiency of lepidolite during the ore dressing process of lepidolite, which reduces the recovery rate of lithium minerals. Therefore, in the ore dressing process, the lithium content in the tailings of lepidolite minerals needs to be reduced before the ore dressing.

[0003] In order to separate metal minerals from non-metallic minerals, gravity separation, flotation, magnetic separation, electrostatic separation, chemical methods, etc. are generally used to remove or reduce harmful substances and prevent environmental pollution. Among them, the most commonly used method is magnetic separation. By utilizing the magnetic differences of various minerals, the minerals are placed in a magnetic field. Minerals whose magnetic force is greater than the opposite mechanical force will be sucked up by the magnetic disk, thereby screening out useful metal minerals, and then fall down through demagnetization and are collected in a storage box. The minerals that are not adsorbed will be separated as tailings with the conveyor belt.

[0004] However, the existing magnetic separation device cannot automatically adjust the height of the minerals to prevent the magnetic separation device from being scratched, and cannot screen the size of the minerals, nor can it screen the muddy water containing lithium ore. In addition, the screening effect on the minerals pressed under the minerals is limited. Summary of the invention

[0005] The object of the present invention is to provide a magnetic separation device for reducing the lithium content in lepidolite beneficiation tailings, so as to solve the problems raised in the above-mentioned background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] A magnetic separation device for reducing the lithium content in lithium mica beneficiation tailings, comprising a base, a separator, a first magnetic separation mechanism, a second magnetic separation mechanism, a vertical plate, a fixed plate, and a fixed frame, wherein the base is connected to the vertical plate, the base is connected to the fixed plate, the base is connected to the fixed frame, the separator is fixedly connected to the vertical plate, the separator is connected to the vertical plate, the first magnetic separation mechanism is connected to the fixed plate and the fixed frame, and the second magnetic separation mechanism is connected to the separator;

[0008] The No. 1 magnetic separation mechanism includes a bearing shaft, a sleeve assembly, a ring body, a stop assembly, a speed change unit, and a pneumatic unit. The bearing shaft and the fixed plate are fixedly connected, the sleeve assembly is sleeved on the ring body outside the bearing shaft, the stop assembly is arranged on the bearing shaft, the speed change unit and the ring body are transmission connected, and the pneumatic unit and the speed change unit are fixedly connected.

[0009] The lithium content in the lithium mica ore dressing tailings is reduced by a magnetic separation device. In order to fully recover the lithium in the tailings, a solid-liquid separation method is adopted to magnetically separate the solid particles and liquid in the tailings. After the No. 1 magnetic separation mechanism adsorbs the solid particles on the separation element on the ring body, the rotation speed of the ring body continues to increase under the interaction of the speed change unit and the pneumatic unit. The No. 1 magnetic separation mechanism moves forward and stays in the annular groove under the action of the stop component. As the rotation speed of the ring body continues to increase, the centrifugal force received by the adsorbed ore is greater, and the ore is thrown out under the action of the centrifugal force.

[0010] Furthermore, the speed change unit includes a sliding rod, a mounting plate, a pulley, a transmission belt, a gear, a ring gear, and a motor. The motor and the fixed frame are tightly connected, the motor output end and the pulley are transmission connected, the transmission belt and the pulley are transmission connected, the gear and the pulley are transmission connected, the ring gear and the gear are meshed, the pulley and the mounting plate are fixedly connected, the mounting plate and the sliding rod are slidably connected, the sliding rod and the fixed frame are fixedly connected, and the electric telescopic rod and the fixed frame are fixedly connected.

[0011] The speed change unit is composed of multiple parts and is installed through a fixed frame. The mounting plate is pushed forward by an electric telescopic rod. The upper and lower pulleys make the transmission belt form a cam shape, which changes the speed ratio between the two pulleys, causing the lower pulley to rotate faster and faster. The lower pulley drives the coaxially rotating gear to rotate faster and faster. The gear ring meshing with it also rotates faster under the drive of the gear, so that the No. 1 magnetic separation mechanism can throw out the adsorbed mineral particles.

[0012] Furthermore, the pneumatic unit includes a circular tube, a piston, a paddle plate, an inverted U-shaped air pipe, a horizontal plate, a balloon, and a vertical air pipe. The horizontal plate and the fixed frame are fixedly connected, an extrusion groove is provided at the bottom of the horizontal plate, the balloon and the extrusion groove are slidably connected, the vertical air pipe and the balloon are connected, the inverted U-shaped air pipe and the vertical air pipe are connected, the upper part of the circular tube and the inverted U-shaped air pipe are connected, the piston and the circular tube are slidably connected, the paddle plate and the piston are fixedly connected, the circular tube and the connecting rod of the mounting plate are fixedly connected, and the paddle plate and the upper pulley are fixedly connected.

[0013] The pneumatic unit is used to bring the two cones of the upper pulley closer to each other, so that the transmission belt between the two pulleys becomes a cam shape. Under the action of the electronic telescopic rod, the mounting plate moves forward, driving the entire No. 1 magnetic separation mechanism to move forward. An extrusion groove is provided at the bottom of the horizontal plate. The extrusion groove is a structure that is wide at the back and narrow at the front. The balloon moves forward in the extrusion groove and is squeezed to become smaller. The gas in the balloon passes through the vertical air pipe and then through the inverted U-shaped air pipe and then enters the circular tube. The gas pushes the pistons in the circular tube to move closer to each other. The paddle fixedly connected to the piston is fixedly connected to the upper pulley, so that the two cones of the pulley are closer to each other, causing the transmission ratio of the two pulleys to change.

[0014] Furthermore, the sleeve assembly includes an annular sleeve, a ring, and a spoke rod. The annular sleeve and the bearing shaft are slidably connected, the ring and the annular sleeve are fixedly connected, and the spoke rod and the ring are fixedly connected.

[0015] As the ring body rotates, the annular sleeve and the ring changer also rotate under the drive of the spoke rod, and the rotation axis of the ring body and the axis center line of the bearing shaft are coaxial.

[0016] Furthermore, the stop assembly includes an arc-shaped baffle, an arc-shaped telescopic plate, a sliding column, and a fixed column. An annular groove is provided on the load-bearing shaft, a longitudinal groove is provided on the upper part of the load-bearing shaft, an arc-shaped groove is provided on the front wall of the annular groove, the arc-shaped baffle and the arc-shaped groove are slidably connected, the arc-shaped baffle and the fixed column are fixedly connected, the arc-shaped telescopic plate is placed at the bottom of the annular groove, the arc-shaped telescopic plate and the fixed column are fixedly connected, and the sliding column and the annular sleeve are fixedly connected.

[0017] Due to the stop component, the No. 1 magnetic separation mechanism will stay for a period of time after moving forward, and the sliding column and the annular sleeve are connected and rotated under the drive of the spoke rod. The sliding column generates heat by friction with the arc-shaped telescopic plate during rotation, causing the telescopic plate to extend. Under the action of the fixed column, the arc-shaped baffle completely slides into the arc-shaped groove, and the longitudinal groove and the annular groove are connected. Then the sliding column slides into the longitudinal groove, and the No. 1 magnetic separation mechanism continues to move forward to reach the next annular groove.

[0018] Furthermore, the separation part includes a filter screen, an upper material guide pipe, a lower material guide pipe, a conveyor belt, and a raised step. The filter screen and the vertical plate are fixedly connected, the upper material guide pipe and the filter screen are fixedly connected, the upper material guide pipe is provided with a through groove below the filter screen, the conveyor belt is sleeved outside the upper material guide pipe, the raised step and the upper material guide pipe are slidably connected, and the lower material guide pipe is placed directly below the filter screen.

[0019] The lithium mica beneficiation tailings are separated into solid and liquid through the filter screen, and the solid particles are transported from the upper guide pipe to the raised step through the conveyor belt. Smaller mineral particles pass directly from the raised step, and the larger mineral particles compress the spring under the raised step under the action of gravity. The raised step slides downward so that the larger mineral particles will not scratch the ring body and the gear ring. Since the No. 1 magnetic separation mechanism and the metal mineral particles are closer, the metal minerals can be more fully adsorbed onto the ring body, and the particles containing lithium are adsorbed by the No. 1 magnetic separation mechanism. Ordinary mineral materials slide into the storage box when they reach the tail of the conveyor belt, and the liquid falls into the lower guide pipe through the filter screen and enters the No. 2 magnetic separation mechanism.

[0020] Furthermore, the second magnetic separation mechanism includes a diverter pipe, a diverter plate, a fixed rod, and a magnetic block. The diverter pipe and the lower material guide pipe are fixedly connected, the diverter plate and the diverter pipe are fixedly connected, the fixed rod and the diverter pipe are fixedly connected, and the magnetic block and the fixed rod are fixedly connected.

[0021] The liquid enters the No. 2 magnetic separation mechanism, and is divided into several streams by the diversion plate and enters the diversion pipe. When the liquid flows out of the diversion pipe, the parabolic path of the water flow containing metal minerals is changed under the attraction of the magnetic block to the metal minerals, so the water flow containing lithium metal can be screened.

[0022] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: the present invention uses the cooperation of the pneumatic elements, the speed change unit and the stop assembly in the No. 1 magnetic separation mechanism to make the ring stop every time it moves forward for a certain distance, and at the same time uses the change in the speed ratio between the two pulleys to make the speed of the gears continuously increase and drive the ring body to continuously increase, and uses the different centrifugal forces on the minerals on the ring body at different speeds to throw them out, so that minerals of different sizes can be screened out, and the cooperation of the raised steps on the upper guide tube and the spring enables the No. 1 magnetic separation mechanism to automatically adjust the minerals according to the size of the minerals. The height of the particles, when adsorbing small particles of minerals, due to their own small gravity, the small particles of minerals will move upward under the action of the spring, reducing the distance from the magnetic separation structure and improving the magnetic separation performance; when adsorbing large particles of minerals, due to their large dead weight, the spring will be compressed to a large extent, increasing the distance from the magnetic separation mechanism, avoiding scratches and damage to the magnetic separation mechanism, and increasing the service life of the magnetic separation mechanism. The tailings liquid is converted into several small streams through the No. 2 magnetic separation mechanism. Under the attraction of the magnetic block to the metal minerals, water streams with different lithium contents can be screened out, enriching the diversity of lithium content screening in the lithium mica beneficiation tailings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the driving structure of the first magnetic separation mechanism of the present invention;

[0026] Figure 3 It is a schematic diagram of the structure of the speed change unit and the pneumatic unit of the present invention;

[0027] Figure 4 yes Figure 2 A magnified view of a part of the view;

[0028] Figure 5 It is a partial structural schematic diagram of the pneumatic component of the present invention;

[0029] Figure 6 It is a schematic diagram of the horizontal plate structure of the present invention;

[0030] Figure 7 It is a structural schematic diagram of the sleeve assembly and the ring body of the present invention;

[0031] Figure 8 yes Figure 2 A magnified view of a part B of the view;

[0032] Fig. 9 It is a schematic diagram of the raised step and conveyor belt structure of the present invention;

[0033] Fig.10 It is a structural schematic diagram of the No. 2 magnetic separation mechanism of the present invention;

[0034] In the figure: 1-base, 2-separator, 21-filter, 22-upper guide pipe, 23-lower guide pipe, 24-convex belt, 25-raised step, 3-No. 1 magnetic separation mechanism, 31-bearing shaft, 311-annular groove, 312-longitudinal groove, 313-arc groove, 32-set assembly, 321-annular sleeve, 322-ring, 323-spoke rod, 33-ring body, 34-stay assembly, 341-arc baffle, 342-arc telescopic plate, 343-sliding column, 344-fixed column, 35-speed unit, 351 -slide rod, 352-mounting plate, 353-pulley, 354-transmission belt, 355-gear, 356-gear ring, 357-motor, 358-electric telescopic rod, 36-pneumatic unit, 361-circular tube, 362-piston, 363-paddle plate, 364-inverted U-shaped air pipe, 365-horizontal plate, 3651-extrusion groove, 366-balloon, 367-vertical air pipe, 4-No. 2 magnetic separation mechanism, 41-diverter pipe, 42-diverter plate, 43-fixed rod, 44-magnetic block, 5-vertical plate, 6-fixed plate, 7-fixed frame. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] The present invention provides a technical solution:

[0037] like Figure 1-2 As shown, a magnetic separation device for reducing the lithium content in lithium mica beneficiation tailings comprises a base 1, a separator 2, a first magnetic separation mechanism 3, a second magnetic separation mechanism 4, a vertical plate 5, a fixed plate 6, and a fixed frame 7. The base 1 is connected to the vertical plate 5, the base 1 is connected to the fixed plate 6, the base 1 is connected to the fixed frame 7, the separator 2 is fixedly connected to the vertical plate 5, the separator 2 is connected to the vertical plate 5, the first magnetic separation mechanism 3 is connected to the fixed plate 6 and the fixed frame 7, and the second magnetic separation mechanism 4 is connected to the separator 2;

[0038] The No. 1 magnetic separation mechanism 3 includes a bearing shaft 31, a sleeve component 32, a ring body 33, a stop component 34, a speed change unit 35, and a pneumatic unit 36. The bearing shaft 31 and the fixed plate 6 are fixedly connected, the sleeve component 32 is sleeved on the ring body 33 outside the bearing shaft 31, the stop component 34 is arranged on the bearing shaft 31, the speed change unit 35 and the ring body 33 are transmission connected, and the pneumatic unit 36 ​​and the speed change unit 35 are fixedly connected.

[0039] The lithium content in the lithium mica ore dressing tailings is reduced by a magnetic separation device. In order to fully recover the lithium in the tailings, a solid-liquid separation method is adopted to magnetically separate the solid particles and liquid in the tailings respectively. After the No. 1 magnetic separation mechanism 3 adsorbs the solid particles on the separation element 2 on the ring body 33, the rotation speed of the ring body 33 continues to increase under the interaction of the speed change unit 35 and the pneumatic unit 36. The No. 1 magnetic separation mechanism 3 moves forward and stays in the annular groove 311 under the action of the stop component 34. As the rotation speed of the ring body 33 continues to increase, the centrifugal force received by the adsorbed ore is greater, and the ore is thrown out under the action of the centrifugal force.

[0040] like Figure 3-4 As shown, the speed change unit 35 includes a slide bar 351, a mounting plate 352, a pulley 353, a transmission belt 354, a gear 355, a ring gear 356, and a motor 357. The motor 357 is fastened to the fixed frame 7, the output end of the motor 357 is transmission-connected to the pulley 353, the transmission belt 354 is transmission-connected to the pulley 353, the gear 355 is transmission-connected to the pulley 353, the ring gear 356 is meshed with the gear 355, the pulley 353 is fixedly connected to the mounting plate 352, the mounting plate 352 is slidably connected to the slide bar 351, the slide bar 351 is fixedly connected to the fixed frame 7, and the electric telescopic rod 358 is fixedly connected to the fixed frame 7.

[0041] The speed change unit 35 is composed of multiple parts and is installed through the fixing frame 7. The mounting plate 352 is pushed forward by the electric telescopic rod 358. The upper and lower pulleys 353 make the transmission belt 354 form a cam shape, so that the speed ratio between the two pulleys 353 changes, resulting in the lower pulley 353 rotating faster and faster. The lower pulley 353 drives the coaxially rotating gear 355 to rotate faster and faster. The gear ring 356 meshing with it rotates faster under the drive of the gear 355, so that the No. 1 magnetic separation mechanism 3 can throw out the adsorbed mineral particles.

[0042] like Figure 5-6 As shown, the pneumatic unit 36 ​​includes a circular tube 361, a piston 362, a paddle 363, an inverted U-shaped air tube 364, a horizontal plate 365, a balloon 366, and a vertical air tube 367. The horizontal plate 365 is fixedly connected to the fixing frame 7, an extrusion groove 3651 is provided at the bottom of the horizontal plate 365, the balloon 366 and the extrusion groove 3651 are slidably connected, the vertical air tube 367 is connected to the balloon 366, the inverted U-shaped air tube 364 is connected to the vertical air tube 367, the upper part of the circular tube 361 is connected to the inverted U-shaped air tube 364, the piston 362 and the circular tube 361 are slidably connected, the paddle 363 and the piston 362 are fixedly connected, the circular tube 361 and the connecting rod of the mounting plate 352 are fixedly connected, and the paddle 363 and the upper pulley 353 are fixedly connected.

[0043] The pneumatic unit 36 ​​is used to make the two cone disks of the upper pulley 353 approach each other, so that the transmission belt 354 between the two pulleys 353 becomes a cam shape, and the mounting plate 352 moves forward under the action of the electric telescopic rod 358, driving the entire No. 1 magnetic separation mechanism 3 to move forward. An extrusion groove 3651 is provided at the bottom of the cross plate 365, and the extrusion groove 3651 is a structure that is wide at the back and narrow at the front. The balloon 366 moves forward in the extrusion groove 3651, and the balloon 366 is squeezed and becomes smaller. The gas in the balloon 366 passes through the vertical air pipe 367 and then through the inverted U-shaped air pipe 364 and then enters the circular tube 361. The gas pushes the piston 362 in the circular tube 361 to approach each other, and the paddle 363 fixedly connected to the piston 362 is fixedly connected to the upper pulley 353, so that the two cone disks of the pulley 353 approach each other, so that the transmission ratio of the two pulleys 353 changes.

[0044] like Figure 7 As shown, the sleeve assembly 32 includes an annular sleeve 321, a ring 322, and a spoke rod 323. The annular sleeve 321 is slidably connected to the bearing shaft 31, the ring 322 is fixedly connected to the annular sleeve 321, and the spoke rod 323 is fixedly connected to the ring 322.

[0045] As the ring body 33 rotates, the annular sleeve 321 and the ring ring 322 also rotate under the drive of the spoke rod 323, and the rotation axis of the ring body 33 and the axis center line of the bearing shaft 31 are coaxial.

[0046] like Figure 8 As shown, the stay assembly 34 includes an arc-shaped baffle plate 341, an arc-shaped telescopic plate 342, a sliding column 343, and a fixed column 344. An annular groove 311 is provided on the load-bearing shaft 31, a longitudinal groove 312 is provided on the upper part of the load-bearing shaft 31, an arc-shaped groove 313 is provided on the front wall of the annular groove 311, the arc-shaped baffle plate 341 and the arc-shaped groove 313 are slidably connected, the arc-shaped baffle plate 341 and the fixed column 344 are fixedly connected, the arc-shaped telescopic plate 342 is placed at the bottom of the annular groove 311, the arc-shaped telescopic plate 342 and the fixed column 344 are fixedly connected, and the sliding column 343 and the annular sleeve 321 are fixedly connected.

[0047] Due to the stop assembly 34, the No. 1 magnetic separator 3 will stay for a period of time after moving forward. The sliding column 343 and the annular sleeve 321 are connected and rotated under the drive of the spoke rod 323. The sliding column 343 generates heat by friction with the arc-shaped telescopic plate 342 during rotation, causing the telescopic plate to extend. Under the action of the fixed column 344, the arc-shaped baffle 341 completely slides into the arc-shaped groove 313, and the longitudinal groove 312 and the annular groove 311 are connected. Then the sliding column 343 slides into the longitudinal groove 312, and the No. 1 magnetic separator 3 continues to move forward to reach the next annular groove 311.

[0048] like Figures 1 to 9 As shown, the separation element 2 includes a filter screen 21, an upper material guide pipe 22, a lower material guide pipe 23, a conveyor belt 24, and a raised step 25. The filter screen 21 is fixedly connected to the vertical plate 5, the upper material guide pipe 22 is fixedly connected to the filter screen 21, the upper material guide pipe 22 is provided with a through groove below the filter screen 21, the conveyor belt 24 is sleeved on the outside of the upper material guide pipe 22, the raised step 25 is slidably connected to the upper material guide pipe 22, and the lower material guide pipe 23 is placed directly below the filter screen 21.

[0049] The lithium mica ore dressing tailings are separated into solid and liquid through the filter 21, and the solid particles are passed from the upper guide pipe 22 to the raised step 25 through the conveyor belt 24. Smaller mineral particles pass directly from the raised step 25, and larger mineral particles compress the spring under the raised step 25 under the action of gravity. The raised step 25 slides downward so that the larger mineral particles will not scratch the ring body 33 and the gear ring 356. Since the No. 1 magnetic separation mechanism 3 and the metal mineral particles are closer, the minerals can be more fully adsorbed onto the ring body 33, and the particles containing lithium are adsorbed by the No. 1 magnetic separation mechanism 3. Ordinary mineral materials slide into the storage box when they reach the tail with the conveyor belt 24, and the liquid falls into the lower guide pipe 23 through the filter 21 and enters the No. 2 magnetic separation mechanism 4.

[0050] like Fig.10As shown, the second magnetic separation mechanism 4 includes a shunt pipe 41, a shunt plate 42, a fixed rod 43, and a magnetic block 44. The shunt pipe 41 is fixedly connected to the lower material guide pipe 23, the shunt plate 42 is fixedly connected to the shunt pipe 41, the fixed rod 43 is fixedly connected to the shunt pipe 41, and the magnetic block 44 is fixedly connected to the fixed rod 43.

[0051] The liquid enters the No. 2 magnetic separation mechanism 4, and is divided into several streams by the diverter plate 42 and enters the diverter pipe 41. The liquid flows out of the diverter pipe 41. Under the attraction of the magnetic block 44 to the metal minerals, the parabolic path of the water flow containing the metal minerals is changed, and the water flow containing lithium metal can be screened.

[0052] The working principle of the present invention is as follows: the mica beneficiation tailings are poured into the separation element 2, and the liquid flows from the filter screen 21 into the lower guide pipe 23. The solid particles are brought to the raised step 25 by the conveyor belt 24. The smaller mineral particles pass directly from the raised step 25. The larger mineral particles compress the spring under the raised step 25 under the action of gravity. The raised step 25 slides downward so that the larger mineral particles will not scratch the ring body 33 and the gear ring 356. Since the No. 1 magnetic separation mechanism 3 and the metal mineral particles are closer, the minerals can be more fully adsorbed onto the ring body 33. After adsorption, the electric telescopic rod 358 pushes the mounting plate 352 to drive the No. 1 magnetic separation mechanism to The gas in the balloon 366 passes through the vertical air pipe 367 and then the inverted U-shaped air pipe 364 and then enters the circular tube 361. The gas pushes the piston 362 in the circular tube 361 to approach each other. The paddle 363 fixedly connected to the piston 362 is fixedly connected to the upper pulley 353, so that the two cones of the pulley 353 approach each other, so that the transmission ratio of the two pulleys 353 changes, the speed of the lower pulley 353 becomes faster and faster, and the speed of the coaxially rotating gear 355 driven by the lower pulley 353 also becomes faster and faster, and the gear ring 356 meshing with it is driven by the gear 355. The rotation speed increases under the action of the slider 343 and the annular sleeve 321 connected to the spoke rod 323 rotates, and the slider 343 generates heat by friction with the arc-shaped telescopic plate 342 during the rotation, so that the arc-shaped telescopic plate 342 extends, and the arc-shaped baffle 341 completely slides into the arc groove 313 under the action of the fixed column 344, and the longitudinal groove 312 is connected with the annular groove 311, and then the slider 343 slides into the longitudinal groove 312, and the first magnetic separation mechanism 3 continues to move forward to the next annular groove 311, and the balloon 366 is further squeezed by the squeezing groove 3651, so that the transmission ratio of the pulley 353 is larger and the rotation speed becomes faster, thereby making the first The No. 1 magnetic separation mechanism 3 can throw out the adsorbed mineral particles. When the rotation speed becomes faster, the small particles are first thrown out to the last storage box and then the larger particles are thrown into the front storage box to achieve the screening of the size of solid mineral particles. After the liquid flows into the lower guide pipe 23, it flows into the No. 2 magnetic separation mechanism 4 under the action of gravity, and is divided into several streams and enters the diverter pipe 41 under the action of the diverter plate 42. The liquid flows out of the diverter pipe 41 and is attracted by the magnetic block 44 to the metal minerals. The parabolic path of the water flow containing the metal minerals is changed, so that the water containing different metal minerals flows to different storage boxes, so that the water flow containing lithium metal can be screened.

[0053] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0054] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A magnetic separation device for reducing the lithium content in lepidolite beneficiation tailings, characterized in that: The magnetic separation device comprises a base (1), a separator (2), a first magnetic separation mechanism (3), a second magnetic separation mechanism (4), a vertical plate (5), a fixed plate (6), and a fixed frame (7); the base (1) is connected to the vertical plate (5), the base (1) is connected to the fixed plate (6), the base (1) is connected to the fixed frame (7), the separator (2) is fixedly connected to the vertical plate (5), the separator (2) is connected to the vertical plate (5), the first magnetic separation mechanism (3) is connected to the fixed plate (6) and the fixed frame (7), and the second magnetic separation mechanism (4) is connected to the separator (2); The first magnetic separation mechanism (3) comprises a bearing shaft (31), a sleeve assembly (32), a ring body (33), a stop assembly (34), a speed change unit (35), and a pneumatic unit (36); the bearing shaft (31) and the fixed plate (6) are fixedly connected, the sleeve assembly (32) is sleeved on the ring body (33) outside the bearing shaft (31), the stop assembly (34) is arranged on the bearing shaft (31), the speed change unit (35) and the ring body (33) are transmission-connected, and the pneumatic unit (36) and the speed change unit (35) are fixedly connected.

2. A magnetic separation device for reducing the lithium content in lepidolite ore dressing tailings according to claim 1, characterized in that: The speed change unit (35) comprises a slide bar (351), a mounting plate (352), a pulley (353), a transmission belt (354), a gear (355), a gear ring (356), a motor (357), and an electric telescopic rod (358); the motor (357) and a fixing frame (7) are tightly connected; an output end of the motor (357) and the pulley (353) are transmission-connected; the transmission belt (354) and the pulley (353) are transmission-connected; and the gear (355) and the gear ring (356) are connected to each other. The electric telescopic rod (358) is connected to the fixed frame (7) by transmission, the gear ring (356) is meshed with the gear (355), the pulley (353) is fixedly connected to the mounting plate (352), the mounting plate (352) is slidably connected to the slide bar (351), the slide bar (351) is fixedly connected to the fixed frame (7), the electric telescopic rod (358) is fixedly connected to the fixed frame (7), and the output end of the electric telescopic rod (358) is fixedly connected to the mounting plate (352).

3. A magnetic separation device for reducing the lithium content in lepidolite ore dressing tailings according to claim 1, characterized in that: The pneumatic unit (36) comprises a circular tube (361), a piston (362), a paddle (363), an inverted U-shaped air tube (364), a horizontal plate (365), a balloon (366), and a vertical air tube (367). The horizontal plate (365) and a fixing frame (7) are fixedly connected. An extrusion groove (3651) is provided at the bottom of the horizontal plate (365). The balloon (366) and the extrusion groove (3651) are slidably connected. The vertical air tube (367) and the balloon (366) are connected to the vertical air tube (367). The bag (366) is connected, the inverted U-shaped air tube (364) is connected to the vertical air tube (367), the upper part of the circular tube (361) is connected to the inverted U-shaped air tube (364), the piston (362) and the circular tube (361) are slidably connected, the paddle (363) and the piston (362) are fixedly connected, the circular tube (361) and the connecting rod of the mounting plate (352) are fixedly connected, and the paddle (363) and the upper pulley (353) are fixedly connected.

4. A magnetic separation device for reducing the lithium content in lepidolite ore dressing tailings according to claim 1, characterized in that: The sleeve assembly (32) comprises an annular sleeve (321), a ring (322), and a spoke rod (323); the annular sleeve (321) and the bearing shaft (31) are slidably connected, the ring (322) and the annular sleeve (321) are fixedly connected, and the spoke rod (323) and the ring (322) are fixedly connected.

5. A magnetic separation device for reducing the lithium content in lepidolite ore dressing tailings according to claim 4, characterized in that: The stop assembly (34) comprises an arc-shaped baffle plate (341), an arc-shaped telescopic plate (342), a sliding column (343), and a fixed column (344); an annular groove (311) is provided on the bearing shaft (31); a longitudinal groove (312) is provided on the upper part of the bearing shaft (31); an arc-shaped groove (313) is provided on the front wall of the annular groove (311); the arc-shaped baffle plate (341) and the arc-shaped groove (313) are slidably connected; the arc-shaped baffle plate (341) and the fixed column (344) are fixedly connected; the arc-shaped telescopic plate (342) is placed at the bottom of the annular groove (311); the arc-shaped telescopic plate (342) and the fixed column (344) are fixedly connected; and the sliding column (343) and the annular sleeve (321) are fixedly connected.

6. A magnetic separation device for reducing the lithium content in lepidolite ore dressing tailings according to claim 1, characterized in that: The separation element (2) comprises a filter screen (21), an upper material guide pipe (22), a lower material guide pipe (23), a conveyor belt (24), and a raised step (25); the filter screen (21) and the vertical plate (5) are fixedly connected; the upper material guide pipe (22) and the filter screen (21) are fixedly connected; the upper material guide pipe (22) is provided with a through groove below the filter screen (21); the conveyor belt (24) is sleeved outside the upper material guide pipe (22); the raised step (25) and the upper material guide pipe (22) are slidably connected; and the lower material guide pipe (23) is placed below the filter screen (21).

7. A magnetic separation device for reducing the lithium content in lepidolite ore dressing tailings according to claim 1, characterized in that: The second magnetic separation mechanism (4) comprises a shunt pipe (41), a shunt plate (42), a fixed rod (43), and a magnetic block (44); the shunt pipe (41) and the lower material guide pipe (23) are fixedly connected; the shunt plate (42) and the shunt pipe (41) are fixedly connected; the fixed rod (43) and the shunt pipe (41) are fixedly connected; and the magnetic block (44) and the fixed rod (43) are fixedly connected.

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