System for recovering rare earth from rare earth mother liquor

Abstract

The utility model discloses a system for recovering rare earth from rare earth mother liquor, which comprises an impurity removal platform, a precipitation platform and a liquor preparation platform, the impurity removal platform comprises an impurity removal process pool, the impurity removal process pool is provided with a set of drain pipes, an impurity removal enriched matter discharge pipe, a cantilever crane and an aeration assembly, a plurality of drain pipes are laid at the bottom of the impurity removal process pool, and the precipitation platform is arranged on the precipitation platform. The upper end of the drain pipe is communicated with the impurity removal process tank, and the lower end extends out of the impurity removal process tank; the cantilever crane is mounted on the edge of the impurity removal process tank and is close to a water inlet port of the drainage pipe; the aeration assembly is provided with a plurality of aeration holes, and the aeration holes form air waves which are large in the middle and small in the periphery at the bottom of the impurity removal process pool; the structure of the precipitation platform is the same as that of the impurity removal process pool; and the liquid preparation platform is used for recycling precipitation supernatant after precipitation of rare earth ions and comprises a liquid preparation pool. The stirring device has the advantages of high stirring efficiency, high ion ore rare earth precipitation speed and the like.

Description

Technical Field

[0001] This utility model relates to the field of ion-type rare earth ore separation technology, and in particular to a system for recovering rare earth from rare earth mother liquor. Background Technology

[0002] Rare earth elements exist primarily in the Earth's crust as minerals, occurring as ionic compounds within mineral crystal lattices. A current novel mining method for rare earth minerals is in-situ leaching, which involves injecting a high-concentration cation exchange solution (magnesium sulfate solution) into the mine without damaging surface vegetation or excavating topsoil and ore. This process leaches out rare earth ions. Under the combined pressure of the injected water and gravity, the rare earth ions flow to the bottom of the mine and are eventually collected.

[0003] Typically, these collected rare earth ion solutions (also known as rare earth mother liquor) need to be collected through a process tank for precipitation, including impurity precipitation and rare earth ion precipitation. Before collection, the solution also needs to be agitated to accelerate the exchange between the mineral metal ions and the added compounds, forming a colloidal mineral product that precipitates. Existing patent document CN112961982B discloses a system and method for removing impurities from ion-type rare earth ore leaching mother liquor. This system features multiple sets of motor-driven agitators to meet production stirring requirements, but it has high equipment investment costs and is not conducive to subsequent maintenance.

[0004] The above background information is provided only to aid in understanding the concept and technical solution of this utility model. It does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above information was disclosed on the filing date of this patent application, the above background information should not be used to evaluate the novelty and inventiveness of this application. Utility Model Content

[0005] The main purpose of this invention is to propose a system for recovering rare earths from rare earth mother liquor with high stirring efficiency and fast precipitation of ion-mineral rare earths.

[0006] Therefore, this utility model proposes a system for recovering rare earths from rare earth mother liquor.

[0007] Preferably, the present invention may also have the following technical features:

[0008] A system for recovering rare earth from rare earth mother liquor includes a purification platform, a precipitation platform, and a solution preparation platform, wherein the construction height of the purification platform, precipitation platform, and solution preparation platform decreases sequentially, and each platform has a drop.

[0009] The impurity removal platform comprises an impurity removal process tank, which is provided with a set of drainage pipes, impurity removal concentrate discharge pipes, a cantilever crane and a gas explosion assembly.

[0010] The structure of the sedimentation platform is the same as that of the impurity removal process tank, which comprises a sedimentation process tank, which is provided with a set of drainage pipes, ore discharge pipes, a cantilever crane and a gas explosion assembly.

[0011] The liquid preparation platform is used for recycling the supernatant after the precipitation of rare earth ions, and comprises a liquid preparation tank.

[0012] Further, the liquid inlet pipe is further provided with a mechanical valve and an electronic valve at the rear end of the pipe body, and the mechanical valve is located above the electronic valve.

[0013] Further, the gas explosion holes comprise first gas explosion holes and a plurality of second gas explosion holes, the first gas explosion holes are located in the middle of the bottom of the impurity removal process tank, and a plurality of second gas explosion holes are further provided around the first gas explosion holes, and the diameter of the first gas explosion holes is larger than that of the second gas explosion holes.

[0014] Further, the second gas explosion pipe is located between the first gas explosion pipe and the third gas explosion pipe, the second gas explosion pipe is provided with 2 second gas explosion holes and 1 first gas explosion hole, the first gas explosion hole is arranged between the 2 second gas explosion holes, and the first gas explosion pipe and the third gas explosion pipe are respectively provided with 2 second gas explosion holes, and each second gas explosion hole is arranged around the first gas explosion hole.

[0015] Further, the drainage pipe comprises a water inlet pipe, a connecting pipe, a water outlet pipe, a first hose and a second hose, wherein the two ends of the first hose are connected to the water inlet pipe and the connecting pipe respectively, the other end of the connecting pipe is connected to the second hose, the other end of the second hose is connected to the water outlet pipe, and the other end of the water outlet pipe penetrates out of the impurity removal process tank.

[0016] Further, the other end of the water inlet pipe is provided with a right-angle elbow, and the other end of the right-angle elbow serves as a water inlet port, which faces upward.

[0017] Further, the installation height of the water outlet pipe is located above the bottom level of the impurity removal process tank.

[0018] Further, the bottom of the impurity removal process tank is also provided with an impurity removal concentrate discharge pipe, the upper end of the impurity removal concentrate discharge pipe is communicated with the bottom of the impurity removal process tank, and the lower end extends to an impurity removal concentrate storage tank, and a valve is arranged on the pipe body extending out of the impurity removal process tank to open or close the impurity removal concentrate discharge pipe.

[0019] Further, the cantilever crane comprises a base plate, a stand, a cross arm, an electric hoist, the lower end of the stand is fixed on the base plate, and the upper end is connected with the right end of the cross arm, a sliding groove is arranged on the cross arm to assemble the electric hoist, and the cantilever crane further comprises a winch, a first pulley, a second pulley, a hook and a steel wire rope, the winch is installed on the lower part of the stand, the first pulley and the second pulley are respectively installed on the two ends of the cross arm, the middle part of the steel wire rope is wound around the first pulley and the second pulley, the rear end of the steel wire rope is connected to the winch, and the front end of the steel wire rope is connected to the hook.

[0020] Further, the cantilever crane comprises a base plate, a stand, a cross arm, an electric hoist, the lower end of the stand is fixed on the base plate, and the upper end is connected with the right end of the cross arm, a sliding groove is arranged on the cross arm to assemble the electric hoist, and the cantilever crane further comprises a winch, a first pulley, a second pulley, a hook and a steel wire rope, the winch is installed on the lower part of the stand, the first pulley and the second pulley are respectively installed on the two ends of the cross arm, the middle part of the steel wire rope is wound around the first pulley and the second pulley, the rear end of the steel wire rope is connected to the winch, and the front end of the steel wire rope is connected to the hook.

[0021] The beneficial effects of the present application compared with the prior art include: during work, the mechanical valve is fully opened, the flow of the liquid inlet pipe is adjusted through the electronic valve, so that the electronic valve is controlled through PLC, remote control of the electronic valve is realized, workers are reduced to close or open the valve, and work efficiency is improved. When the electronic valve fails, the flow of the liquid inlet pipe can be controlled through the mechanical valve. The air burst assembly is provided with a plurality of air burst holes, the air burst holes form a large middle and small periphery air wave at the bottom of the impurity removal process tank, the middle airflow is more powerful, and the stirring effect is improved through the middle radiation to the periphery. The air burst assembly is adopted to stir the rare earth mother liquor, the equipment investment cost is low, and maintenance is easy. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present application, and the arrow direction in the diagram represents the movement direction of the drain pipe.

[0023] Figure 2 It is a local enlarged view of the present application.

[0024] Figure 3 It is a structural schematic diagram of the impurity removal process tank of the present application, and the air burst assembly is not shown in the diagram.

[0025] Figure 4 It is a structural schematic diagram of the cantilever crane of the present application.

[0026] Figure 5 It is a structural schematic diagram of the drain pipe of the present application.

[0027] Figure 6It is the main view of the pipe rack of the utility model.

[0028] Figure 7 It is the plan view of the pipe rack of the utility model.

[0029] Figure 8 It is the layout of the gas explosion assembly at the bottom of the impurity removal process tank of the utility model. DETAILED DESCRIPTION

[0030] The utility model will be explained in further detail in combination with specific embodiments and by referring to the drawings. It should be emphasized that the following description is merely exemplary and is not intended to limit the scope of the utility model and its applications.

[0031] With reference to the following drawings, non-limiting and non-exclusive embodiments will be described, in which the same reference numerals indicate the same parts, unless otherwise specifically indicated.

[0032] As Figures 1-8 shown in the utility model discloses a system for recovering rare earth from rare earth mother liquor, including impurity removal platform, precipitation platform, liquid preparation platform, the construction height of impurity removal platform, precipitation platform, liquid preparation platform is lowered in proper order, each platform has the drop.

[0033] The impurity removal platform is used for removing impurities in the rare earth mother liquor, and comprises an impurity removal process tank 5, which is provided with a set of drainage pipes, impurity removal concentrate discharge pipes, a cantilever crane and a gas explosion assembly.

[0034] The precipitation platform is used for precipitating rare earth ions in rare earth mother liquor, and has the same structure and impurity removal process tank as the impurity removal process tank, and comprises a precipitation process tank 20 provided with a set of drain pipes 4, ore discharge pipes 49, a cantilever crane and a gas explosion assembly. The size of the precipitation process tank 20 is the same as that of the impurity removal process tank 5, and the drain pipes 4, the ore discharge pipes 49, the cantilever crane and the gas explosion assembly are arranged at the same positions of the precipitation process tank 20. The structure of the ore discharge pipes 49 is the same as that of the impurity removal concentrate discharge pipes 48, and since the substances precipitated in the impurity removal process tank and the precipitation process tank are different, the substances transported by the two are also different. The liquid inlet pipe 8 is further provided, the rear end of the liquid inlet pipe 8 is connected to the lower end of the drain pipe 4, the front end of the liquid inlet pipe 8 extends above the precipitation process tank 20, and the impurity-removed mother liquor is introduced into the precipitation process tank 20. Preferably, the rear end of the liquid inlet pipe 8 is further provided with a mechanical valve 10 and an electronic valve 9, and the mechanical valve 10 is located above the electronic valve 9. The mechanical valve 10 and the electronic valve 9 can both control the flow of the liquid inlet pipe 8. In operation, the mechanical valve 10 is fully opened, and the flow of the liquid inlet pipe 8 is adjusted by the electronic valve 9. In this way, the opening degree of the electronic valve 9 is controlled by PLC, so that the electronic valve 9 can be remotely controlled, reducing the need for workers to manually close or open the valve and improving work efficiency. When the electronic valve 9 fails, the flow of the liquid inlet pipe 8 can be controlled by the mechanical valve 9. Preferably, the liquid inlet pipe 8 is a bent pipe, the middle part of which is buried underground to avoid overhead piping and facilitate installation and maintenance of the mechanical valve 10 and the electronic valve 9. Six drain pipes 4 are provided, and the drain pipes 4 are selected according to the emptying time requirement of the impurity removal process tank. The flow is simulated and calculated by the Manning formula. Currently, 900 cubic meters of water are required to be emptied in one hour, and six PVC pipes with a diameter of 200 mm are selected. The impurity removal process tank and the precipitation process tank of the present application can meet the requirement of precipitating impurities from 900 cubic meters of mother liquor, and the work efficiency is significantly improved.

[0035] The liquid preparation platform is used for recycling the supernatant after precipitation of rare earth ions, and comprises a liquid preparation tank 30.

[0036] The gas explosion hole comprises a first gas explosion hole 72 and a plurality of second gas explosion holes 71. The first gas explosion hole 72 is located in the middle of the bottom of the impurity removal process tank, and a plurality of second gas explosion holes 71 are further provided around the first gas explosion hole 72. The diameter of the first gas explosion hole 72 is larger than that of the second gas explosion hole 71, so that the gas wave blown out of the first gas explosion hole 72 is the largest.

[0037] In one preferred embodiment, the air blowing assembly comprises a first air blowing pipe 61, a second air blowing pipe 62 and a third air blowing pipe 63, the middle parts of the first air blowing pipe 61, the second air blowing pipe 62 and the third air blowing pipe 63 are arranged at the bottom of the impurity removal process tank, and the three pipes are arranged at intervals according to the shape of the bottom of the impurity removal process tank. The front and rear ends of the first air blowing pipe 61, the second air blowing pipe 62 and the third air blowing pipe 63 extend to above the impurity removal process tank 5 along the opposite two side walls of the impurity removal process tank, respectively. The rear end of the first air blowing pipe 61, the second air blowing pipe 62 and the third air blowing pipe 63 is connected to the gas source pipeline, and the front end is sealed, so that after the gas is introduced, the air is blown out from the first air blowing hole 72 and the second air blowing hole 71. Preferably, the front end of the first air blowing pipe 61, the second air blowing pipe 62 and the third air blowing pipe 63 is provided with a control valve for adjusting the air flow of the first air blowing pipe 61, the second air blowing pipe 62 and the third air blowing pipe 63. Specifically, the second air blowing pipe 62 is located between the first air blowing pipe 61 and the third air blowing pipe 63, the second air blowing pipe 62 is provided with two second air blowing holes 71 and one first air blowing hole 72, and the first air blowing hole 72 is arranged between the two second air blowing holes 71. The first air blowing pipe 61 and the third air blowing pipe 63 are respectively provided with two second air blowing holes 71, and each second air blowing hole 71 is arranged around the first air blowing hole 72.

[0038] The cantilever crane comprises a base plate, a stand column 1, a cross arm 11, an electric hoist 3, the lower end of the stand column 1 is fixed on the base plate, and the upper end is connected with the right end of the cross arm 11; the cross arm 11 is provided with a sliding groove 12 for assembling the electric hoist 3, the sliding groove 12 extends along the length direction of the cross arm 11, so that the electric hoist 3 moves back and forth along the length direction of the cross arm 11 through the sliding groove 12. The cantilever crane further comprises a winch 2, a first pulley 25, a second pulley 26, a hook 24 and a steel wire rope 23, the winch 2 is installed at the lower part of the stand column 1, the first pulley 25 and the second pulley 26 are respectively installed at the two ends of the cross arm 11, the middle part of the steel wire rope 23 is wound around the first pulley 25 and the second pulley 26, one end of the steel wire rope 23 is connected with the winch 22, and the other end of the steel wire rope 23 is connected with the hook 24. In the embodiment, the winch lifting device is added on the basis of the traditional cantilever crane, the winch 22 can provide a greater pulling force than the electric hoist 3, can meet the requirements of large-mass lifting operation, and can ensure the free and stable lifting of the drainage pipe of the impurity removal process tank 5. Moreover, the winch 2 is located at one side of the water inlet port 41 of the drainage pipe, the water inlet end of the drainage pipe extends to the position directly below the cross arm 11, and the drainage pipe 4 and the cross arm 11 overlap in space, when the sedimentation and impurity removal work is performed, the winch 2 lifts the water inlet port 41 of the drainage pipe to a predetermined height; when the supernatant needs to be discharged after the impurity removal is completed, the winch 2 gradually lowers the water inlet port 41 of the drainage pipe to a second predetermined height, so that the supernatant enters the water inlet port 41 and is discharged from the drainage pipe to the impurity removal process tank 5. Preferably, the height of the drainage pipe 4 is gradually lowered, and after the drainage pipe 4 is lowered to a certain height and the drainage is performed for a certain time, the height of the drainage pipe 4 is continuously lowered, so that the drainage is performed layer by layer.

[0039] Further improvement of the above embodiment is combined with Figure 4 Further comprising a lifting ring 27, the lifting ring 27 is fixed at the left end of the cross arm 11, the hook 24 is a pulley hook, and the end of the steel wire rope 23 is connected to the lifting ring 27 after being wound around the pulley of the hook 24. Preferably, further comprising a sunshade cover 21, the winch 2 is fixed on the stand column 1 through a support 22, the sunshade cover 21 is installed above the support 22 and above the winch 2 through a connecting rod, and is used for shading and rainproofing for the winch 2.

[0040] In the preferred embodiment, when the steel wire rope between the hook 24 and the second pulley 26 is in a vertical state, the water inlet port of the drainage pipe 4 is pulled to a predetermined position, at this time, the water inlet port 41 of the drainage pipe is higher than the liquid level of the mother liquor in the sedimentation process tank.

[0041] In the patent document CN220099140U, the drainage pipe 4 is only designed with a section of hose, and when the drainage pipe is lifted, the pipe body to be pulled is long and heavy. As an improvement, the combination of Figure 5The drain pipe 4 comprises a water inlet pipe 42, a connecting pipe 44, a water outlet pipe 46, a first hose 43 and a second hose 45. The two ends of the first hose 43 are connected to the water inlet pipe 42 and the connecting pipe 44 respectively. The other end of the connecting pipe 44 is connected to the second hose 45. The other end of the second hose 45 is connected to the water outlet pipe 46. The other end of the water outlet pipe 46 is out of the impurity removal process tank 5. The other end of the water inlet pipe 42 is provided with a right-angle bend. The other end of the right-angle bend is used as a water inlet port 41 which faces upward. In this embodiment, the water inlet pipe 42, the connecting pipe 44 and the water outlet pipe 46 are hard plastic pipes. Two hoses are used to separate the three hard pipes. When the hoist 2 hoists the water inlet pipe end of the drain pipe 4 in a small amplitude, the first hose 43 is deformed to make the connecting pipe 44 not be subjected to the lifting force in the process of lifting the water inlet pipe 42 to the first height, thereby reducing the lifting power of the water inlet pipe 42. When the mother liquor level of the impurity removal process tank rises to the first water level, the connecting pipe 44 and the water inlet pipe 42 are subjected to the buoyancy. At this time, the water inlet pipe 42 is lifted to the second height (the height of the water inlet port 41 is above the mother liquor level when the water inlet pipe 42 reaches the second height) by the hoist 2. In the process of reaching the second height, the connecting pipe 44 is also gradually lifted to an upward angle. Preferably, the installation height of the water outlet pipe 46 is above the bottom level of the impurity removal process tank 5. Preferably, the hose is a steel wire framework corrugated hose.

[0042] In combination with Figures 6-7 The pipe rack comprises a fixing frame 85, two pull rods 83, a pull ring 82, a pull rope 81 and a locking member 84. The lower ends of the two pull rods 83 are welded and fixed on the fixing frame 85. The pull ring 82 is fixed on the middle part of the pull rope 81. The two ends of the pull rope 81 are connected to the upper ends of the two pull rods 83 respectively. The locking member 84 is used to press and fix the water inlet pipe end of the drain pipe 4. The ends of the six drain pipes 4 are fixed on the fixing frame 85 by the locking member 84. The locking member 84 can be a horse saddle or a bandage. In operation, the hook 24 hooks the pull ring to lift or lower the height of the water inlet port of the drain pipe. In use, the hook 31 of the electric hoist 3 pulls the hook 24 of the hoist 2 to the side of the hoist 2. By controlling the position of the moving electric hoist hook 31, the hook 24 hooks the pull ring 82. The labor intensity of pulling the hook 24 to hook the pull ring 82 is reduced. The personnel do not need to go down to the bottom of the sedimentation process tank.

[0043] In a preferred embodiment, in combination with Figure 3The bottom of the impurity removal process tank 5 is also provided with an impurity removal concentrate discharge pipe 48, the upper end of which communicates with the bottom of the impurity removal process tank 5, and the lower end extends to an impurity removal concentrate storage tank. A valve 47 is arranged on the pipe body extending out of the impurity removal process tank 5 to open or close the impurity removal concentrate discharge pipe 48. During impurity removal, the valve 47 is closed. When the impurity removal process tank needs to be cleaned, the valve 47 is opened. The impurity removal concentrate is flushed and discharged to the impurity removal concentrate storage tank through the impurity removal concentrate discharge pipe 48. When the impurity removal concentrate is discharged, a part of the impurity removal concentrate is reserved at the bottom of the impurity removal process tank 5, and a part of the impurity removal concentrate is kept in the pipe body from the valve 47 to the upper end of the impurity removal concentrate discharge pipe 48 to prevent a large amount of mother liquor from the subsequent impurity removal from flowing into the impurity removal concentrate discharge pipe.

[0044] Those skilled in the art will recognize that numerous modifications can be made to the above description while still falling within the scope of the application. The examples and figures are merely used to describe one or more specific embodiments.

[0045] While the present application has been described and illustrated with respect to the exemplary embodiments thereof, it will be understood by those skilled in the art that various changes in form and detail can be made therein without departing from the spirit of the application. Additionally, many modifications can be made to adapt a particular situation to the teachings of the present application without departing from the central concept of the present application. Therefore, the present application is not limited to the particular embodiments disclosed in this disclosure but includes all embodiments falling within the scope of the present application and their equivalent.

Claims

1. A system for recovering rare earths from a rare earth mother liquor, comprising a removal platform, a precipitation platform and a liquid preparation platform, the construction heights of the removal platform, the precipitation platform and the liquid preparation platform are sequentially reduced, and each platform has a drop; characterized in that: the removal platform comprises a removal process tank, the removal process tank is provided with a set of drainage pipes, a removal concentrate discharge pipe, a cantilever crane and a gas explosion assembly, the bottom of the removal process tank is paved with a plurality of drainage pipes, the upper end of the drainage pipe is communicated with the removal process tank, and the lower end extends out of the removal process tank; the cantilever crane is installed on the tank edge of the removal process tank and is close to the water inlet port of the drainage pipe; the gas explosion assembly is provided with a plurality of gas explosion holes, and the gas explosion holes form a large middle and small periphery gas wave at the bottom of the removal process tank; the precipitation platform has the same structure as the removal process tank, and comprises a precipitation process tank, the precipitation process tank is provided with a set of drainage pipes, a mine discharge pipe, a cantilever crane and a gas explosion assembly; the liquid preparation platform is used for recycling the precipitation supernatant after precipitation of rare earth ions, and comprises a liquid preparation tank. Further comprising a liquid inlet pipe, the rear end of the liquid inlet pipe is further provided with a mechanical valve and an electronic valve, and the mechanical valve is located above the electronic valve. The gas explosion hole comprises a first gas explosion hole and a plurality of second gas explosion holes, the first gas explosion hole is located in the middle of the bottom of the removal process tank, and a plurality of second gas explosion holes are further provided around the first gas explosion hole, and the aperture of the first gas explosion hole is larger than that of the second gas explosion hole. The second gas explosion pipe is located between the first gas explosion pipe and the third gas explosion pipe, the second gas explosion pipe is provided with 2 second gas explosion holes and 1 first gas explosion hole, the first gas explosion hole is arranged between the 2 second gas explosion holes; the first gas explosion pipe and the third gas explosion pipe are respectively provided with 2 second gas explosion holes, and each second gas explosion hole is separately arranged around the first gas explosion hole.

2. The system for recovering rare earths from a rare earth mother liquor according to claim 1, characterized in that: The drainage pipe comprises a water inlet pipe, a connecting pipe, a water outlet pipe, a first hose and a second hose, wherein the two ends of the first hose are connected with the water inlet pipe and the connecting pipe respectively, the other end of the connecting pipe is connected with the second hose, the other end of the second hose is connected with the water outlet pipe, and the other end of the water outlet pipe penetrates out of the removal process tank.

3. The system for recovering rare earths from a rare earth mother liquor according to claim 1, characterized in that: The other end of the water inlet pipe is provided with an elbow, and the other end of the elbow serves as a water inlet port.

4. The system for recovering rare earths from a rare earth mother liquor according to claim 3, characterized in that: The installation height of the water outlet pipe is above the bottom level of the removal process tank.

5. The system for recovering rare earths from a rare earth mother liquor according to claim 1, characterized in that: The bottom of the removal process tank is further provided with a removal concentrate discharge pipe, the upper end of the removal concentrate discharge pipe is communicated with the bottom of the removal process tank, the lower end extends to a removal concentrate storage tank, and a valve is further arranged on the pipe body extending out of the removal process tank to open or close the removal concentrate discharge pipe.

6. A system for recovering rare earths from a rare earth solution as claimed in claim 5, characterized in that: ​ 7. The system for recovering rare earths from a rare earth solution as claimed in claim 5, characterized by: ​ 8. The system for recovering rare earths from a rare earth solution as claimed in claim 1, characterized by: ​ 9. The system for recovering rare earths from a rare earth solution as claimed in claim 1, characterized by: The cantilever crane comprises a base plate, a stand, a cross arm, an electric hoist, the lower end of the stand is fixed on the base plate, and the upper end is connected with the right end of the cross arm; the cross arm is provided with a sliding groove for assembling the electric hoist, and further comprises a winch, a first pulley, a second pulley, a hook and a steel wire rope, the winch is installed on the lower part of the stand, the first pulley and the second pulley are respectively installed on the two ends of the cross arm, the middle part of the steel wire rope is wound around the first pulley and the second pulley, the rear end is connected with the winch, and the front end is connected with the hook.

10. The system for recovering rare earths from a rare earth solution as claimed in claim 1, characterized by: Further comprising a lifting ring, the lifting ring is fixed on the left end of the cross arm; the hook is a pulley hook, and the front end of the steel wire rope is wound around the pulley of the hook and then connected to the lifting ring.

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