Column leaching test device for simulating ionic rare earth electric mining

Abstract

The utility model relates to the technical field of ionic rare earth mining, in particular to a column leaching test device for simulating ionic rare earth electric mining. Comprising a direct-current stabilized power supply, an ore body leaching soil column device, a peristaltic pump, an electrolyte storage device and a leachate collection device, the ore body leaching soil column device comprises an upper water system microfiltration membrane, an upper quartz sand cushion layer, an upper combined electrode, mine area humus layer soil, mine area fully-weathered layer soil, mine area semi-weathered layer soil, a lower combined electrode, a lower quartz sand cushion layer and a lower water system microfiltration membrane from top to bottom. Compared with the prior art, the device has the advantages of simplicity in manufacturing, low cost, high experimental flexibility and the like, different experimental conditions can be flexibly adjusted, and the exploration time of various parameters of the ionic rare earth electric mining technology is remarkably shortened; the release migration mechanism of various ions under different voltage conditions is disclosed, the electrochemical migration mechanism of heavy metal ions is clarified, and powerful theoretical support is provided for green mining of mines and ecological environment protection.

Description

TECHNICAL FIELD

[0001] The utility model relates to ion type rare earth mine exploitation technical field especially, and it relates to a kind of column leaching test device for simulating ion type rare earth electric mining. BACKGROUND

[0002] As an indispensable resource of modern industry, rare earth elements play an irreplaceable role in the fields of electronic devices, clean energy, aerospace, etc. The current mainstream rare earth extraction process still faces two major technical challenges: first, the traditional pool leaching and heap leaching process has the defects of serious environmental pollution and high energy consumption; second, although the improved in-situ leaching process has made progress in controlling overt ecological damage, it is still difficult to eliminate potential environmental risks.

[0003] To solve the above technical bottlenecks, researchers have proposed ion-type rare earth electric mining technology based on the principle of electric field driving. This technology establishes a directional electric field to promote the electric migration and electroosmotic flow of rare earth ions, achieving selective enrichment of target elements, thereby green, efficient and selective recovery of rare earth elements from weathering crust. Compared with traditional processes, this technology system has three innovative advantages: (1) by optimizing electrode arrangement and electric field parameters, the rare earth recovery rate can be increased to more than 95%; (2) the process reduces 80% of the leaching agent dosage and 95% of the ammonia-nitrogen emission, reducing the use of chemical reagents and wastewater discharge; (3) the comprehensive energy consumption is reduced by 60% and the mining cycle is shortened by 70%, with both environmental and economic benefits. It helps to solve the problems of environmental pollution and resource waste in traditional mining process. It is particularly important to note that the electroosmotic effect plays a dual role in this technology: it not only accelerates the directional migration of rare earth ions, but also improves the permeability of the ore body through electric field regulation, providing a new way to solve the tailings reinforcement problem.

[0004] However, the industrial application of this technology still faces key scientific problems that need to be broken through: first, a quantitative relationship model between electric field parameters (voltage loading mode, electrode configuration, electrolyte composition, pH regulation, etc.) and heavy metal migration behavior needs to be established through indoor simulation experiments; second, the coupling mechanism of different electrodynamic parameters on rare earth leaching kinetics needs to be explored; finally, the optimal parameter combination that takes into account extraction efficiency and environmental risk prevention and control needs to be determined through multi-objective optimization algorithm. These basic researches have important theoretical value for building an environmentally friendly rare earth green mining technology system.

[0005] To overcome the above technical difficulties, it is urgent to develop a special test device to achieve the following functions: (1) accurately simulate the multi-physical field coupling environment of rare earth ore body under the action of electric field; (2) real-time monitor the dynamic migration law of heavy metal ions; (3) quickly obtain experimental data required for optimizing process parameters. The development of this device will become an important technical support for promoting the engineering application of electric mining technology. SUMMARY

[0006] In view of the deficiencies of the prior art, the purpose of the utility model is to provide a column leaching test device for simulating ion type rare earth electric mining, which solves the problems of leaching efficiency of ion type rare earth ore and release and migration of typical heavy metals under different voltage adding modes by reasonably configuring an electrode system, optimizing voltage adding modes, adjusting key parameters such as electrolyte types and pH values, efficiently simulates leaching efficiency, heavy metal ion migration and release processes under various conditions in a laboratory, explores the correlation between improvement measures and various improvement parameters, and determines the optimal improvement scheme by comprehensively considering various indexes.

[0007] The utility model discloses a column leaching test device for simulating ion type rare earth electric mining, which comprises a direct current stabilized power supply, a ore body leaching soil column device, a peristaltic pump, an electrolyte storage device and a leaching liquid collecting device.

[0008] The ore body leaching soil column device comprises, from top to bottom, an upper water system microporous filter membrane, an upper quartz sand cushion layer, an upper combined electrode, a mine area humus layer soil, a mine area full weathering layer soil, a mine area semi-weathering layer soil, a lower combined electrode, a lower quartz sand cushion layer and a lower water system microporous filter membrane.

[0009] The positive electrode of the direct current stabilized power supply is electrically connected to the upper electrode rod, and the negative electrode of the direct current stabilized power supply is electrically connected to the lower electrode rod.

[0010] One end of the hose of the peristaltic pump is connected to the upper end of the ore body leaching soil column device, and the other end of the hose is inserted into the electrolyte storage device to slowly pump the electrolyte in the electrolyte storage device into the upper end of the ore body leaching soil column device.

[0011] The leaching liquid collecting device is arranged below the ore body leaching soil column device and is used to collect the leaching liquid flowing out of the ore body leaching soil column device.

[0012] As some embodiments of the utility model, a support base is further included, the ore body leaching soil column device is placed on the support base, and the leaching liquid collecting device is arranged below the support base. The support base improves the stability of the entire column leaching test device and facilitates the collection and removal of the leaching liquid.

[0013] As a preferred embodiment of the utility model, the direct current stabilized power supply is a programmable linear power supply. The programmable linear power supply has high precision, low noise and low ripple output, supports programming control, responds quickly, adapts to dynamic load, and is equipped with multiple protection measures such as overvoltage protection, overcurrent protection and overtemperature protection to ensure the safety of the equipment and the measured object.

[0014] As a preferred embodiment of the present application, the positive and negative poles of the direct current stabilized power supply are provided with crocodile clips, which are convenient for connecting with the ore body leaching soil column device.

[0015] As a preferred embodiment of the present application, the upper and lower combination electrodes are made of graphene material, which has extremely high conductivity and can realize efficient electric field distribution in column leaching test, which is helpful for electroosmosis, electromigration and other electrochemical processes. Graphene has excellent acid and alkali resistance and corrosion resistance, and is suitable for processing various complex environments in column leaching test, including high salinity, strong acid or strong alkali solution. Moreover, graphene has low overpotential and fast electron transfer capacity, which can effectively promote redox reaction and enhance the release or migration efficiency of pollutants.

[0016] As a preferred embodiment of the present application, the upper combination electrode includes an electrode plate and an upper electrode rod arranged on the electrode plate, and the lower combination electrode includes an electrode plate and a lower electrode rod arranged below the electrode plate. The upper and lower electrode rods can realize the concentration effect of strong electric field in a local range, and the electrode plates can expand the electric field distribution, so as to ensure that the electric field is more uniform in the whole experimental area.

[0017] As a preferred embodiment of the present application, the combination of the upper electrode rod, the lower electrode rod and the electrode plate can be flexibly adjusted in layout and voltage size according to test requirements, and can adapt to complex test conditions. The electric field strength and direction can be controlled by changing the positions of the upper and lower electrode rods or the inclination angle of the electrode plate.

[0018] As a preferred embodiment of the present application, the ore body leaching soil column device is in a cylindrical shape, which simulates the ion exchange column in the mine.

[0019] As a preferred embodiment of the present application, the ore body leaching soil column device is made of transparent acrylic material by hot melting, gluing and other methods, which has good sealing effect and can prevent leakage of water, gas or pollutants. The acrylic material has strong corrosion resistance to most soil solutions, pollutants and experimental reagents, and is not easy to react with chemicals, so as to ensure the stability of the experimental environment. After the test is completed, the surface of the acrylic material is easy to clean and can be reused, which saves the test cost.

[0020] As a preferred embodiment of the present application, the side wall of the ore body leaching soil column device is provided with through holes corresponding to the humus layer soil, the full weathered layer soil and the semi-weathered layer soil in the mining area, which is convenient for obtaining the soil samples after the soil in each ore layer is leached. The bottom end of the ore body leaching soil column device is provided with a filter hole for filtering out the leaching solution, so as to realize the collection of the leaching solution.

[0021] As some embodiments of the present application, the electrolyte storage device and the leaching solution collection device in the column leaching test device both use sample storage bottles made of polyethylene material, which has good corrosion resistance to most acid, alkali and salt solutions and is not easy to react with test liquids, ensuring the stability of the solution properties.

[0022] As some embodiments of the present application, the ore body leaching soil column device is provided with uniform filter holes and funnel parts at the bottom, facilitating the collection of leaching solution.

[0023] As some embodiments of the present application, the humus layer soil thickness in the mining area is 2cm-4cm, the full weathering layer soil thickness in the mining area is 5cm-20cm, and the semi-weathering layer soil thickness in the mining area is 2cm-4cm.

[0024] The one or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0025] 1. Environmental friendliness and experimental precision are improved: The ore body leaching soil column device is divided into humus layer, full weathering layer and semi-weathering layer soil, a direct current stabilized power supply and a combined electrode system are used to construct a directional electric field, rare earth ions are driven to migrate directionally, and a peristaltic pump is used to accurately infuse electrolyte, which truly restores the geological structure and fluid dynamics of the mine, ensures the reliability of experimental data, provides a high-precision simulation environment for optimizing the mining process, reduces the dependence on chemical leaching agents, and reduces the pollution risk from the source.

[0026] 2. Operation efficiency and functional expandability are optimized: The transparent acrylic material column design supports visual observation during the experiment, the side wall through hole facilitates layered sampling; the electrode inclination and position are adjustable, which adapts to different electric field strength and direction requirements, and cooperates with the programmable power supply to dynamically control the voltage parameters, realizes rapid experimental condition switching, shortens the parameter optimization period, and improves the research and development efficiency.

[0027] 3. Theoretical support and industrial application value: By monitoring the heavy metal ion concentration of the leaching solution and the changes of the soil sample in real time, the system reveals the quantitative relationship between the electric field strength, electrolyte composition and ion migration rate, provides core data for establishing an electrochemical migration model; the modular design enhances the stability and repeatability of the device, reduces the cost of single experiment, and provides key technical support for the promotion of electric mining technology from laboratory research to engineering. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 FIG. 1 is a structural schematic diagram of a column leaching test device for simulating ion-type rare earth electric mining according to an embodiment of the present application;

[0029] Figure 2 FIG. 4 is a structural schematic diagram of the upper combined electrode according to an embodiment of the present application.

[0030] The reference signs in the drawings are: 1, a direct current stabilized power supply; 11, a positive pole of the power supply; 12, a negative pole of the power supply; 2, a ore body leaching soil column device; 21, an upper water system microporous filter membrane; 22, an upper quartz sand cushion layer; 23, an upper combined electrode; 231, an upper electrode rod; 24, a humus layer soil in a mining area; 25, a fully weathered layer soil in a mining area; 26, a semi-weathered layer soil in a mining area; 27, a lower combined electrode; 271, a lower electrode rod; 28, a lower quartz sand cushion layer; 29, a lower water system microporous filter membrane; 3, a peristaltic pump; 4, an electrolyte storage device; 5, a leaching liquid collecting device; 6, a supporting base. DETAILED DESCRIPTION

[0031] In order to better understand the above technical solutions, the above technical solutions will be described in detail below in combination with the drawings in the specification and specific embodiments.

[0032] Embodiment 1: This embodiment is a column leaching test device for simulating ion type rare earth electric mining, as shown in Figure 1 、 Figure 2 , which comprises a direct current stabilized power supply 1, a ore body leaching soil column device 2, a peristaltic pump 3, an electrolyte storage device 4 and a leaching liquid collecting device 5.

[0033] The ore body leaching soil column device 2 comprises, from top to bottom, an upper water system microporous filter membrane 21, an upper quartz sand cushion layer 22, an upper combined electrode 23, a humus layer soil 24 in a mining area, a fully weathered layer soil 25 in a mining area, a semi-weathered layer soil 26 in a mining area, a lower combined electrode 27, a lower quartz sand cushion layer 28 and a lower water system microporous filter membrane 29, wherein the upper combined electrode 23 is further provided with an upper electrode rod 231 extending upward through the upper quartz sand cushion layer 22 and the upper water system microporous filter membrane 21, and the lower combined electrode 27 is further provided with a lower electrode rod 271 extending downward through the lower quartz sand cushion layer 28 and the lower water system microporous filter membrane 29.

[0034] The positive pole 11 of the direct current stabilized power supply 1 is electrically connected with the upper electrode rod 231, and the negative pole 12 of the direct current stabilized power supply 1 is electrically connected with the lower electrode rod 271.

[0035] One end of the hose of the peristaltic pump 3 is connected with the upper end of the ore body leaching soil column device 2, and the other end extends into the electrolyte storage device 4 to slowly pump the electrolyte in the electrolyte storage device 4 into the upper end of the ore body leaching soil column device 2.

[0036] The leaching liquid collecting device 5 is arranged below the ore body leaching soil column device 2 to collect the leaching liquid flowing out of the ore body leaching soil column device 2.

[0037] Embodiment 2: This embodiment has the same overall structure as Embodiment 1 and is a further selection and optimization thereof, as shown in Figure 1 、 Figure 2 , in which:

[0038] The support base 6 is further included, and the ore body leaching soil column device 2 is placed on the support base 6, and the leaching liquid collecting device 5 is arranged below the support base 6. The support base 6 improves the stability of the whole column leaching test device and facilitates the collection and removal of the leaching liquid.

[0039] The direct current stabilized power supply 1 adopts a programmable linear power supply, which has high precision, low noise and low ripple output, supports programming control, responds quickly, adapts to dynamic load, and is equipped with multiple protection measures such as overvoltage protection, overcurrent protection and overtemperature protection, to ensure the safety of the equipment and the measured object.

[0040] The power supply positive pole 11 and the power supply negative pole 12 of the direct current stabilized power supply 1 are both provided with alligator clips, which are convenient for connection with the ore body leaching soil column device 2.

[0041] The upper combination electrode 23 and the lower combination electrode 27 adopt graphene material, which has extremely high conductivity and can realize efficient electric field distribution in column leaching test, which is helpful for electro-dialysis, electromigration and other electrochemical processes. Graphene has excellent acid and alkali resistance and corrosion resistance, and is suitable for processing various complex environments in column leaching test, including high salinity, strong acid or strong alkali solution. Moreover, graphene has low overpotential and fast electron transfer capacity, which can effectively promote redox reaction and enhance the release or migration efficiency of pollutants.

[0042] The upper combination electrode 23 includes an electrode plate and an upper electrode rod 231 arranged on the electrode plate, and the lower combination electrode 27 includes an electrode plate and a lower electrode rod 271 arranged below the electrode plate. The upper electrode rod 231 and the lower electrode rod 271 can realize the concentrating effect of strong electric field in a local range, and the electrode plate can expand the electric field distribution, so as to ensure that the electric field is more uniform in the whole experimental area. The combination of the upper electrode rod 231, the lower electrode rod 271 and the electrode plate can be flexibly adjusted in layout and voltage size according to test requirements, so as to adapt to complex test conditions. The position of the upper electrode rod 231 and the lower electrode rod 271 or the inclination angle of the electrode plate can be changed to control the electric field strength and direction.

[0043] The ore body leaching soil column device 2 is in a whole cylindrical shape, which simulates the ion exchange column in the mine.

[0044] The ore body leaching soil column device 2 is made of transparent acrylic material through hot melting and gluing, and has good sealing effect, which can prevent leakage of water, gas or pollutants. The acrylic material has strong corrosion resistance to most soil solutions, pollutants and experimental reagents, and is not easy to react with chemicals, so as to ensure the stability of the experimental environment. After the test is completed, the surface of the acrylic material is easy to clean and can be reused, which saves the test cost.

[0045] The side wall of the ore body leaching soil column device 2 is provided with through holes corresponding to the humus layer soil 24, the whole weathered layer soil 25 and the semi-weathered layer soil 26 of the mining area, so as to facilitate the acquisition of the soil samples after the soil of each ore layer is leached, and the bottom end of the ore body leaching soil column device 2 is provided with filter holes for filtering out the leaching liquid and realizing the collection of the leaching liquid.

[0046] The electrolyte is delivered to the ore body leaching soil column device 2 by the peristaltic pump 3, which is a high-precision liquid delivery equipment and can realize precise flow control. Since the structure is simple, the replacement of the hose as the main consumable is convenient, the maintenance cost is reduced, and the service life of the peristaltic pump 3 is long, it is suitable for long-term experimental operation and can better restore the continuous liquid injection in electric mining.

[0047] The electrolyte storage device 4 and the leaching liquid collection device 5 in the column leaching test device both use sample storage bottles made of polyethylene material, which has good corrosion resistance to most acid, alkali and salt solutions and is not easy to react with the test liquid, thereby ensuring the stability of the solution properties.

[0048] The bottom of the ore body leaching soil column device 2 is provided with uniform filter holes and funnel parts.

[0049] In the simulation experiment process of the embodiment, deionized water is used to ensure the moisture of the soil at other times except for 200ml of electrolyte for ion exchange, which has the advantages of high purity, chemical stability and wide applicability, avoids the deposition and fouling caused by mineral ions, protects the equipment and ensures the reliability of the test results.

[0050] The process of the simulation test using the column leaching test device of the embodiment is as follows: first, block the through holes in the side wall of the ore body leaching soil column device 2, then pad the lower water system microporous filter membrane 29 at the bottom of the ore body leaching soil column device 2, then pad the lower quartz sand cushion layer 28 on it, then place the lower combined electrode 27 on the lower quartz sand cushion layer 28, and make the lower electrode rod 271 pass through the lower quartz sand cushion layer 28 and the lower water system microporous filter membrane 29 until it is exposed at the bottom of the ore body leaching soil column device 2, so as to be connected with the power negative electrode 12 of the direct current stabilized power supply 1 in the subsequent process;

[0051] The ore soil layer soil is filled into the ore body leaching soil column device 2, and the ore soil layer soil is the soil of different ore layers in the ion-type rare earth mining area. The ore soil layer soil is filled from bottom to top as follows: the semi-weathered layer soil 26 of the mining area with a depth of 2cm-4cm, the whole weathered layer soil 25 of the mining area with a depth of 15cm-20cm and the humus layer soil 24 of the mining area with a depth of 2cm-4cm;

[0052] Then the upper electrode 23 is placed on the ore soil layer soil, and the upper electrode rod 231 is upward, and then the upper quartz sand cushion layer 22 and the upper water system microporous filter membrane 21 are laid, so that the electrolyte injected from the peristaltic pump falls on the ore soil layer soil without splashing and is uniformly distributed on the surface of the ore soil layer soil and infiltrates, the upper electrode rod 231 penetrates through the upper quartz sand cushion layer 22 and the upper water system microporous filter membrane 21 and is exposed at the top of the ore body leaching soil column device 2, and the positive electrode 11 of the direct current stabilized power supply 1 is connected with the alligator clip, and finally the leaching liquid collecting device 5 is placed below the ore body leaching soil column device 2.

[0053] The positive electrode 11 and the negative electrode 12 of the direct current stabilized power supply 1 are connected with the upper electrode rod 231 and the lower electrode rod 271 respectively, the peristaltic pump 3 is started, 500ml deionized water is injected into the 1L electrolyte storage device 4 as soil wetting liquid, the flow rate is selected as 0.4ml / min, and the soil is wetted for 5 hours, so that the ore soil layer soil in the ore body leaching soil column device 2 reaches the required water content of 34% for the test.

[0054] When 500ml deionized water is completely infiltrated into the ore soil layer soil, 200ml ore leaching agent (electrolyte) solution is injected into the ore body leaching soil column device 2 through the peristaltic pump 3, and when the leaching liquid starts to flow into the leaching liquid collecting device 5 at the bottom of the ore body leaching soil column device 2 after the ore leaching agent is completely injected, the direct current stabilized power supply 1 is started, and the output mode between the positive electrode 11 and the negative electrode 12 is adjusted according to the requirement.

[0055] The soil samples of different ore soil layers at different time points in the electric mining process are obtained through the through holes corresponding to each layer of ore soil layer soil on the side wall of the ore body leaching soil column device 2, the soil samples of different ore soil layers at different time points and the heavy metal ion concentrations in the leaching liquid collecting devices 5 are measured according to the requirement, the heavy metal ion concentrations of the ore soil and the leaching liquid under different applied voltages during the voltage application are obtained, and the migration and release behaviors of the heavy metal ions are further studied, so as to provide theoretical support and practical guidance for the development of efficient pollution control and treatment technology, and provide strong theoretical support for green mining and ecological environment protection of mines.

[0056] Through the above process, the related data can be more accurately and conveniently obtained, the electrochemical migration theory of heavy metal ions is further improved, the release and migration mechanism of heavy metal ions under different voltage conditions is revealed, and the theory of electric mining technology is enriched.

[0057] Although the preferred embodiments of the present application have been described, those skilled in the art can make additional changes and modifications to the embodiments once they know the basic creative concept. Therefore, the appended claims are intended to be interpreted as including all the preferred embodiments and all the changes and modifications falling within the scope of the present application.

[0058] Obviously, many modifications and variations of the present application are possible in light of the above teachings. It is, therefore, to be understood that within the scope of the appended claims and their equivalents, the application can be practiced otherwise than as specifically described.

Claims

1. A column leaching test device for simulating ion-type rare earth electric mining, comprising a direct current stabilized power supply (1), a mineral body leaching soil column device (2), a peristaltic pump (3), an electrolyte storage device (4) and a leaching solution collection device (5), characterized in that: the mineral body leaching soil column device (2) comprises, from top to bottom, an upper water system microporous filter membrane (21), an upper quartz sand cushion layer (22), an upper combined electrode (23), a mineral area humus layer soil (24), a mineral area full weathering layer soil (25), a mineral area semi-weathering layer soil (26), a lower combined electrode (27), a lower quartz sand cushion layer (28) and a lower water system microporous filter membrane (29), wherein the upper combined electrode (23) is further provided with an upper electrode rod (231) extending upward through the upper quartz sand cushion layer (22) and the upper water system microporous filter membrane (21), and the lower combined electrode (27) is further provided with a lower electrode rod (271) extending downward through the lower quartz sand cushion layer (28) and the lower water system microporous filter membrane (29); the positive electrode (11) of the direct current stabilized power supply (1) is electrically connected with the upper electrode rod (231), and the negative electrode (12) of the direct current stabilized power supply (1) is electrically connected with the lower electrode rod (271); one end of the hose of the peristaltic pump (3) is connected with the upper end of the mineral body leaching soil column device (2), and the other end extends into the electrolyte storage device (4); the leaching solution collection device (5) is arranged below the mineral body leaching soil column device (2). The device further comprises a supporting base (6), the mineral body leaching soil column device (2) is placed on the supporting base (6), and the leaching solution collection device (5) is arranged below the supporting base (6). The side wall of the mineral body leaching soil column device (2) is provided with through holes corresponding to the mineral area humus layer soil (24), the mineral area full weathering layer soil (25) and the mineral area semi-weathering layer soil (26). The thickness of the mineral area humus layer soil (24) is 2cm-4cm, the thickness of the mineral area full weathering layer soil (25) is 5cm-20cm, and the thickness of the mineral area semi-weathering layer soil (26) is 2cm-4cm. The upper combined electrode (23) comprises an electrode plate and an upper electrode rod (231) arranged on the electrode plate, and the lower combined electrode (27) comprises an electrode plate and a lower electrode rod (271) arranged below the electrode plate, and the position of the upper electrode rod (231) and the lower electrode rod (271) or the inclination angle of the electrode plate can be changed to control the electric field strength and direction.

2. A column leaching test apparatus for simulating in-situ leaching of rare earth elements, according to claim 1, wherein, The bottom of the mineral body leaching soil column device (2) is provided with uniform filter holes and a funnel part.

3. The column leaching test device for simulating ion-type rare earth electric mining according to claim 1, characterized in that, The mineral body leaching soil column device (2) is in a cylindrical shape as a whole.

4. The apparatus for simulating column leaching test of ion-type rare earth electromining according to claim 1, characterized in that, The direct current stabilized power supply (1) is a programmable linear power supply; the positive electrode (11) and the negative electrode (12) are each provided with an alligator clip.

5. The apparatus for simulating column leaching test of ion-type rare earth electromining according to claim 1, characterized in that, The upper combined electrode (23) and the lower combined electrode (27) are made of graphene material.

6. The apparatus for simulating column leaching test of ion-type rare earth electromining according to claim 1, characterized in that, The mineral body leaching soil column device (2) is made of transparent acrylic material by hot melting and gluing, and the electrolyte storage device (4) and the leaching solution collection device (5) are each made of a polyethylene sample storage bottle.

7. The apparatus for simulating column leaching test of ion-type rare earth electromining according to claim 1, characterized in that, ​ 8. The apparatus for simulating column leaching test of ion-type rare earth electromining according to claim 1, characterized in that, ​ 9. The apparatus for simulating column leaching test of ion-type rare earth electromining according to claim 1, characterized in that, ​ 10. The apparatus for simulating column leaching test of ion-type rare earth electromining according to claim 1, characterized in that, ​

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