Carbon dioxide based in-situ leaching of ion-type rare earth ore mining system

Abstract

This application discloses a carbon dioxide-based in-situ leaching system for ion-adsorption rare earth ores, comprising: a leaching solution storage tank, a carbon dioxide generator, a gas collecting pump, a mother liquor collection device, an injection pipe, a gas injection pipe, a gas guide pipe, and a liquid collecting pipe. The outlet of the leaching solution storage tank is connected to one end of the injection pipe, the other end of which is located inside the mining borehole. The outlet of the carbon dioxide generator is connected to one end of the injection pipe, the other end of which is located inside the mining borehole. The carbon dioxide generator is used to generate carbon dioxide gas. The gas collecting pump's gas collecting port is connected to one end of the gas guide pipe, the other end of which is located inside the mining borehole. The mother liquor collecting device's mother liquor collecting port is connected to one end of the liquid collecting pipe, the other end of which is located below the mining borehole. This system enhances the in-situ leaching flow channels for ion-adsorption rare earth ores, increases the leaching rate, and also contributes to the acidic environment of ion-adsorption rare earth leaching.

Description

Technical Field

[0001] This application relates to the technical field of ion-adsorption rare earth mining, specifically to a carbon dioxide-based in-situ leaching mining system for ion-adsorption rare earth ores. Background Technology

[0002] In ion-adsorption rare earth deposits, rare earth elements are adsorbed on the surface of clay mineral aggregates such as halloysite, illite, kaolinite, and montmorillonite in the form of hydrated or hydroxyl hydrated ions. These deposits have complex formation factors, which can be summarized as follows: long-term physical and chemical weathering of rare earth-rich granite transforms a large amount of rare earth elements in the parent rock minerals into rare earth ions in the weathering crust, which are then adsorbed and enriched on the clay minerals by the downstream migration of leachate.

[0003] Solution leaching is a method that, based on the physicochemical properties of minerals, injects leaching solution into a ore heap, and through chemical action, transforms some useful minerals in underground deposits or surface ores from a solid state into a liquid or gaseous state for recovery. Solution leaching includes surface heap leaching, in-situ leaching, and bacteriological chemical mining.

[0004] In-situ leaching is a novel mining method that involves injecting leachate into a heterogeneous ore body under natural burial conditions through injection wells to leach and recover useful components. The leaching process and efficiency are significantly influenced by seepage patterns and the degree of leaching chemical reactions. Compared to traditional mining methods, in-situ leaching causes less damage to soil and vegetation, requires less infrastructure investment, has a shorter construction period, and lower production costs. However, it still presents challenges such as soil acidification, water pollution, and leaching blind spots. It is primarily suitable for ion-adsorption rare earth deposits, uranium deposits, and copper deposits. For example, the in-situ leaching process for ion-adsorption rare earth deposits, promoted in southern China, is considered a new type of green mining technology due to its low cost and minimal environmental pollution.

[0005] However, how to strengthen the seepage channels has always been a difficult problem in in-situ leaching. Summary of the Invention

[0006] This application aims to at least partially address one of the technical problems in the related art.

[0007] Therefore, the first objective of this application is to propose a carbon dioxide-based in-situ leaching mining system for ion-type rare earth minerals, which can enhance the in-situ leaching flow channels of ion-type rare earth minerals, improve the leaching rate, and at the same time contribute to the acidic environment of ion-type rare earth leaching.

[0008] To achieve the above objectives, the first aspect of this application proposes a carbon dioxide-based in-situ leaching system for rare earth ore, comprising: a leaching solution storage tank, a carbon dioxide generator, a gas collecting pump, a mother liquor collection device, an injection pipe, a gas injection pipe, a gas guide pipe, and a liquid collecting pipe. The outlet of the leaching solution storage tank is connected to one end of the injection pipe, and the other end of the injection pipe is disposed within the mining hole. The leaching solution storage tank stores the leaching solution and injects it into the mining hole through the injection pipe to mine the ion-adsorption rare earth ore, thereby obtaining a mother liquor from the ion-adsorption rare earth ore leaching. The outlet of the carbon dioxide generator is connected to one end of the gas injection pipe. The other end of the gas injection pipe is located inside the mining hole. The carbon dioxide generator generates carbon dioxide gas and injects it into the leaching solution inside the mining hole via the gas injection pipe. The gas collecting pump's gas collecting port is connected to one end of the gas guiding pipe, and the other end of the gas guiding pipe is located inside the mining hole. The gas collecting pump is used to recover carbon dioxide gas emitted from the ion-adsorption rare earth ore through the gas guiding pipe. The mother liquor collecting device's mother liquor collecting port is connected to one end of the liquid collecting pipe, and the other end of the liquid collecting pipe is located below the mining hole. The mother liquor collecting device is used to collect the leaching mother liquor from the ion-adsorption rare earth ore through the liquid collecting pipe.

[0009] The carbon dioxide-based in-situ leaching mining system for ion-adsorption rare earth ores in this application embodiment uses a carbon dioxide generator to produce carbon dioxide gas, which is then injected into the leaching solution in the mining hole through an injection pipe. Simultaneously, a gas collecting pump is used to recover the carbon dioxide gas emanating from the ion-adsorption rare earth ore through a gas guide pipe. By injecting and extracting carbon dioxide gas, the system achieves carbon dioxide gas circulation, which can strengthen the in-situ leaching seepage channel of ion-adsorption rare earth ores and improve the leaching rate. At the same time, carbon dioxide is slightly soluble in water to produce carbonic acid, which helps to create an acidic environment for ion-adsorption rare earth leaching.

[0010] In addition, the carbon dioxide-based ion-adsorption rare earth ore in-situ leaching mining system proposed in this application may also have the following additional technical features:

[0011] In one embodiment of this application, there are multiple mining holes, and the distance between two adjacent mining holes is between 2 and 3 m.

[0012] In one embodiment of this application, the depth of the mining hole 1 reaches 20 cm above the weathered layer.

[0013] In one embodiment of this application, a carbon dioxide booster pump and a leaching solution booster pump are also included, wherein,

[0014] The carbon dioxide booster pump is installed on the gas injection pipe, and the installation position of the carbon dioxide booster pump is close to the gas outlet of the carbon dioxide generator. The carbon dioxide booster pump is used to pressurize the carbon dioxide gas in the gas injection pipe. The leaching solution pressurization pump is installed on the leaching solution injection pipe, and the installation position of the leaching solution pressurization pump is close to the leaching solution storage tank outlet. The leaching solution pressurization pump is used to pressurize the leaching solution in the leaching solution injection pipe.

[0015] In one embodiment of this application, a gas flow meter is further included, wherein the gas flow meter is installed on the gas injection pipe, and the installation position of the gas flow meter is located between the gas outlet of the carbon dioxide generator and the carbon dioxide booster pump; the gas flow meter is used to record the amount of gas flowing through the carbon dioxide in the gas injection pipe.

[0016] In one embodiment of this application, a controller is also included, wherein the controller is connected to the carbon dioxide generator, the gas collecting pump, the mother liquor collecting device, the carbon dioxide booster pump, the leaching liquid booster pump, and the gas flow meter, respectively.

[0017] In one embodiment of this application, the gas injection tube, liquid injection tube, gas guide tube, and liquid collection tube are all PVC (Polyvinyl Chloride) tubes.

[0018] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0019] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0020] Figure 1 This is a schematic diagram of an embodiment of an ion-type rare earth ore in-situ leaching mining system based on carbon dioxide.

[0021] As shown in the figure: 1. Mining hole; 10. Leaching solution storage tank; 20. Carbon dioxide generator; 30. Gas collecting pump; 40. Mother liquor collection device; 50. Liquid injection pipe; 60. Gas injection pipe; 70. Gas guide pipe; 80. Liquid collecting pipe; 100. Leaching solution pressurization pump; 200. Carbon dioxide booster pump; 201. Gas flow meter. Detailed Implementation

[0022] Embodiments of this application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. Rather, embodiments of this application include all variations, modifications, and equivalents falling within the spirit and scope of the appended claims.

[0023] The following describes, with reference to the accompanying drawings, an embodiment of the present application of a carbon dioxide-based ion-type rare earth ore in-situ leaching mining system.

[0024] Figure 1 This is a schematic diagram of a carbon dioxide-based ion-type rare earth ore in-situ leaching mining system according to an embodiment of this application.

[0025] like Figure 1 As shown in the figure, the carbon dioxide-based ion-type rare earth ore in-situ leaching mining system of this application embodiment may include a leaching liquid storage tank 10, a carbon dioxide generator 20, a gas collecting pump 30, a mother liquor collection device 40, a liquid injection pipe 50, a gas injection pipe 60, a gas guide pipe 70, and a liquid collecting pipe 80, wherein the leaching liquid storage tank 10 is a storage tank with a valve switch.

[0026] The leaching solution storage tank 10 has its outlet connected to one end of the injection pipe 50, the other end of which is located inside the mining hole 1. The leaching solution storage tank 10 stores the leaching solution (top water) and injects it into the mining hole 1 through the injection pipe 50 to mine ion-adsorption rare earth ore, thereby obtaining ion-adsorption rare earth ore leaching mother liquor. See [link to relevant documentation]. Figure 1 In order to achieve rapid and efficient mining of ion-adsorption rare earth minerals, multiple mining holes 1 can be excavated and mined simultaneously. Multiple liquid injection pipes 50 described in this example can be provided at the other end (i.e., multiple liquid outlets are provided), and these multiple liquid outlets are respectively set in multiple mining holes 1.

[0027] It should be noted that the leaching solution described in this embodiment can be prepared by mixing ammonium sulfate and sulfuric acid, calcium sulfate and sulfuric acid, or magnesium sulfate and sulfuric acid in a certain proportion.

[0028] As a possible scenario, in order to enable relevant personnel to have a clearer understanding of the injection volume of leaching solution, a liquid flow meter can be installed near the outlet of the leaching solution storage tank 10 in the injection pipe 50 to measure the flow rate of the liquid flowing in the injection pipe 50. In order to improve the service life of the liquid flow meter, a corrosion-resistant flow meter can be used, and the specific specifications can be selected according to the diameter of the injection pipe 50.

[0029] As another possible scenario, in order to remotely control the outflow and stop of the liquid in the leaching solution storage tank 10, a solenoid valve (not specifically marked in the figure) can be installed near the outlet of the leaching solution storage tank 10 on the injection pipe 50. The solenoid valve can have a built-in wireless communication module to communicate with the host computer, receive instructions sent by the host computer, and control the opening and closing of the solenoid valve according to the instructions.

[0030] To clearly illustrate the previous embodiment, in one embodiment of this application, such as Figure 1 As shown, there are multiple mining holes 1, and the distance between two adjacent mining holes 1 is between 2 and 3 m. The number of mining holes 1 is the same as the number of liquid outlets set at the other end of the injection pipe 50.

[0031] Specifically, the depth of the mining hole 1 reaches 20cm above the weathered layer.

[0032] It should be noted that the mining hole 1 described in this example is drilled by personnel using a drilling machine at a pre-selected mining location, down to the weathered layer (as shown in the attached diagram). Figure 1 The original ore is simplified into three layers: humus layer, weathered layer, and bedrock. The ore is located 20cm above the bedrock, and the diameter of the mining hole 1 is 20cm.

[0033] Specifically, in the actual operation, relevant personnel determine the location of mining holes 1 by using the layout strategy of mining holes 1 (generated according to surface conditions and geological structure, wherein the layout strategy of mining holes 1 may include the location of multiple mining holes 1 arranged horizontally, the location of multiple mining holes 1 arranged vertically, the location of multiple mining holes 1 arranged crosswise, and the drilling of mining holes 1 to the weathered layer). Relevant personnel operate a drilling machine to drill holes to 20cm above the weathered layer, drilling multiple mining holes 1 in the original mine body, and the diameter of mining holes 1 is 20cm, and ensuring that the distance between two adjacent mining holes 1 is 2 to 3m.

[0034] As a possible solution, in order to prevent the soil inside the mining hole 1 from collapsing, a pipe body can be installed inside the mining hole 1 to improve the compaction of the soil inside the mining hole 1.

[0035] The outlet of the carbon dioxide generator 20 is connected to one end of the gas injection pipe 60, and the other end of the gas injection pipe 60 is set inside the mining hole 1. The carbon dioxide generator 20 is used to generate carbon dioxide gas and inject the carbon dioxide gas into the leaching solution inside the mining hole 1 through the gas injection pipe 60. In order to improve the gas injection speed of the gas injection pipe 60, the other end of the gas injection pipe 60 described in this example can be provided with multiple gas outlets, such as 2, 3, 4, etc. There is no specific limitation here, and the number of gas outlets is the same as the number of liquid outlets provided at the other end of the liquid injection pipe 50.

[0036] As a possible alternative, the carbon dioxide generator 20 may also be equipped with a control panel (not specifically marked in the figure), through which relevant personnel can control the operation of the carbon dioxide generator 20.

[0037] The gas collecting port of the gas collecting pump 30 is connected to one end of the gas guiding pipe 70, and the other end of the gas guiding pipe 70 is set in the mining hole 1. The gas collecting pump 30 is used to recover carbon dioxide gas emitted from the ion-adsorption rare earth ore through the gas guiding pipe 70. In order to improve the efficiency of recovering carbon dioxide gas emitted from the ion-adsorption rare earth ore, the other end of the gas guiding pipe 70 described in this example can be provided with multiple air inlets, such as 2, 3, 4, etc. There is no specific limitation here, and the number of air inlets is the same as the number of liquid outlets provided at the other end of the liquid injection pipe 50.

[0038] The mother liquor collection device 40 has its mother liquor collection port connected to one end of the collection pipe 80, and the other end of the collection pipe 80 is located below the mining hole 1. The mother liquor collection device 40 is used to collect leaching mother liquor from ion-adsorption rare earth minerals through the collection pipe 80. In order to improve the collection speed of the leaching mother liquor by the collection pipe 80, the other end of the collection pipe 80 can be set to multiple inlets, such as 2, 3, 4, etc., without specific limitations.

[0039] It should be noted that the mother liquor collection device 40 described in this embodiment consists of a pump body (not specifically marked in the figure) and a collection tank (not specifically marked in the figure). The pump is installed on the collection pipe 80 and is used to extract the mother liquor from the leaching of ion-type rare earth minerals through the collection pipe 80 and introduce the leaching mother liquor into the collection tank group for storage. For example, in order to improve the service life of the pump body, a chemical pump can be selected.

[0040] Specifically, in actual operation, relevant personnel open the switch valve at the outlet of the leaching solution storage tank 10, and inject the leaching solution into the mining hole 1 through the injection pipe 50 to mine the ion-adsorption rare earth ore, so as to obtain the ion-adsorption rare earth ore leaching mother liquor. The pump body extracts the ion-adsorption rare earth ore leaching mother liquor through the collection pipe 80, and the leached mother liquor is introduced into the collection pool.

[0041] Simultaneously, the carbon dioxide generator 20 and the gas collecting pump 30 are turned on. The carbon dioxide generator 20 produces carbon dioxide gas, which is injected into the leaching solution in the mining hole 1 through the gas injection pipe 60, causing bubbles to form in the leaching solution. The gas collecting pump 30 recovers the carbon dioxide gas emanating from the ion-adsorption rare earth ore through the gas guide pipe 70. Thus, by injecting and extracting carbon dioxide gas, the purpose of carbon dioxide gas circulation is achieved. This not only strengthens the seepage channels for in-situ leaching of ion-adsorption rare earth ore and increases the leaching rate, but also, because carbon dioxide is slightly soluble in water and produces carbonic acid, it contributes to the acidic environment of ion-adsorption rare earth ore leaching. It should be noted that the carbon dioxide gas described in this example, when circulating in the ion-adsorption rare earth ore, can greatly increase the looseness of the surrounding soil, thereby significantly improving the seepage rate and effect of the leaching solution.

[0042] Furthermore, such as Figure 1 As shown, the above-mentioned carbon dioxide-based ion-adsorption rare earth ore in-situ leaching mining system also includes a carbon dioxide booster pump 200 and a leaching solution pressurizing pump 100. The carbon dioxide booster pump 200 is installed on the gas injection pipe 60, and its installation position is close to the gas outlet of the carbon dioxide generator 20. The carbon dioxide booster pump 200 is used to pressurize the carbon dioxide gas in the gas injection pipe 60. The leaching solution pressurizing pump 100 is installed on the liquid injection pipe 50, and its installation position is close to the liquid outlet of the leaching solution storage tank 10. The leaching solution pressurizing pump 100 is used to pressurize the leaching solution in the liquid injection pipe 50.

[0043] In the embodiments of this application, a carbon dioxide booster pump 200 is set to pressurize the carbon dioxide gas in the gas injection pipe 60 to increase the pressure of the injected carbon dioxide gas. At the same time, a leaching liquid booster pump 100 is set to pressurize the leaching liquid in the liquid injection pipe 50 to increase the pressure of the injected leaching liquid. The above settings further enhance the size of the seepage channel for in-situ leaching of ion-adsorption rare earth minerals.

[0044] Furthermore, such as Figure 1 As shown, the above-mentioned carbon dioxide-based ion-type rare earth leaching mining system also includes a gas flow meter 201. The gas flow meter 201 is installed on the gas injection pipe 60, and the installation position of the gas flow meter 201 is between the gas outlet of the carbon dioxide generator 20 and the carbon dioxide booster pump 200. The gas flow meter 201 is used to record the amount of gas flowing through the carbon dioxide gas in the gas injection pipe 60. Through the above settings, relevant personnel can clearly understand the flow rate of carbon dioxide gas injected into the mining hole 1, thereby better controlling the operation of the carbon dioxide generator 20.

[0045] Furthermore, such as Figure 1As shown, the above-mentioned carbon dioxide-based ion-type rare earth ore in-situ leaching mining system also includes a controller (not specifically marked in the figure), wherein the controller is connected to the carbon dioxide generator 20, the gas collecting pump 30, the mother liquor collecting device 40, the carbon dioxide booster pump 200, the leaching liquid pressurizing pump 100 and the gas flow meter 201 respectively.

[0046] It should be noted that the controller described in this example is electrically connected to the carbon dioxide generator 20, the gas collecting pump 30, the mother liquor collecting device 40, the carbon dioxide booster pump 200, the leaching liquid booster pump 100, and the gas flow meter 201 via wires.

[0047] As one possible scenario, the controller communicates with an external host computer via a wired connection to receive instructions sent by the host computer and control the operation of the electrical equipment connected to the controller according to the instructions.

[0048] In one embodiment of this application, the air injection pipe 60, liquid injection pipe 50, air guide pipe 70, and liquid collection pipe 80 are all PVC pipes (i.e., rigid polyvinyl chloride pipes), which have the characteristics of strong corrosion resistance, easy bonding, low price, and hard texture, thereby improving the service life of the air injection pipe 60, liquid injection pipe 50, air guide pipe 70, and liquid collection pipe 80.

[0049] Specifically, in actual operation, relevant personnel can start the carbon dioxide generator 20, the gas collecting pump 30, the mother liquor collecting device 40, the carbon dioxide booster pump 200, and the leaching solution pressurizing pump 100 through the controller.

[0050] Personnel opened the valve at the outlet of the leaching solution storage tank 10. The leaching solution was pressurized by the leaching solution pressurizing pump 100 and then injected into the mining hole 1 through the injection pipe 50. At the same time, the carbon dioxide generator 20 was controlled to generate carbon dioxide gas. The carbon dioxide gas passed through the gas flow meter 201 and was pressurized by the carbon dioxide booster pump 200. Then it was injected into the mining hole 1 through the gas injection pipe 60. The carbon dioxide gas emanating from the ion-adsorption rare earth ore was recovered by the gas collecting pump 30 and the gas guide pipe 70. The purpose of carbon dioxide gas circulation was achieved through the injection and extraction of carbon dioxide gas. This not only strengthened the seepage channel for in-situ leaching of ion-adsorption rare earth ore and improved the leaching rate, but also, since carbon dioxide is slightly soluble in water to produce carbonic acid, it also helped to create an acidic environment for ion-adsorption rare earth leaching.

[0051] Furthermore, the mother liquor from the leaching of ion-adsorption rare earth ore is extracted by the pump body and the collection pipe 80, and the mother liquor is introduced into the collection tank. The mother liquor is purified and impurities are removed by ammonium bicarbonate. After impurity removal, ammonium bicarbonate or oxalic acid is added to the collection tank for precipitation and enrichment. The supernatant is treated and returned to the leaching ore. The obtained rare earth carbonates or oxalates are calcined to obtain 92% ion-adsorption rare earth concentrate (REO, rare earth oxides).

[0052] In summary, the carbon dioxide-based in-situ leaching mining system for ion-type rare earth minerals in this application can enhance the in-situ leaching seepage channels of ion-type rare earth minerals, improve the leaching rate, and also contribute to the acidic environment of ion-type rare earth leaching.

[0053] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0054] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0055] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A carbon dioxide-based ion-adsorption rare earth ore in-situ leaching mining system, characterized in that, include: The leaching solution storage tank, carbon dioxide generator, gas collecting pump, mother liquor collection device, liquid injection pipe, gas injection pipe, gas guide pipe, and liquid collecting pipe, among which, The outlet of the leaching solution storage tank is connected to one end of the injection pipe, and the other end of the injection pipe is set in the mining hole. The leaching solution storage tank is used to store the leaching solution and inject the leaching solution into the mining hole through the injection pipe to mine ion-adsorption rare earth ore to obtain ion-adsorption rare earth ore leaching mother liquor. The outlet of the carbon dioxide generator is connected to one end of the gas injection pipe, and the other end of the gas injection pipe is set inside the mining hole. The carbon dioxide generator is used to generate carbon dioxide gas and inject the carbon dioxide gas into the leaching solution inside the mining hole through the gas injection pipe. The gas collecting port of the gas collecting pump is connected to one end of the gas guiding pipe, and the other end of the gas guiding pipe is set in the mining hole. The gas collecting pump is used to recover carbon dioxide gas emitted from the ion-adsorption rare earth ore through the gas guiding pipe. The mother liquor collection port of the mother liquor collection device is connected to one end of the collection pipe, and the other end of the collection pipe is located below the mining hole. The mother liquor collection device is used to collect leaching mother liquor from ion-type rare earth minerals through the collection pipe.

2. The carbon dioxide-based ion-adsorption rare earth ore in-situ leaching mining system according to claim 1, characterized in that, in, There are multiple mining holes, and the distance between two adjacent mining holes is between 2 and 3 meters.

3. The carbon dioxide-based ion-adsorption rare earth ore in-situ leaching mining system according to claim 2, characterized in that, in, The depth of the mining hole reaches 20cm above the weathered layer.

4. The carbon dioxide-based ion-adsorption rare earth ore in-situ leaching mining system according to claim 1, characterized in that, It also includes a carbon dioxide booster pump and a leaching solution booster pump, among which, The carbon dioxide booster pump is installed on the gas injection pipe, and the installation position of the carbon dioxide booster pump is close to the gas outlet of the carbon dioxide generator. The carbon dioxide booster pump is used to pressurize the carbon dioxide gas in the gas injection pipe. The leaching solution pressurizing pump is installed on the injection pipe, and the installation position of the leaching solution pressurizing pump is close to the outlet of the leaching solution storage tank. The leaching solution pressurizing pump is used to pressurize the leaching solution in the injection pipe.

5. The carbon dioxide-based ion-adsorption rare earth ore in-situ leaching mining system according to claim 4, characterized in that, It also includes a gas flow meter, wherein the gas flow meter is installed on the gas injection pipe, and the installation position of the gas flow meter is located between the gas outlet of the carbon dioxide generator and the carbon dioxide booster pump; The gas flow meter is used to record the amount of carbon dioxide gas flowing through the gas injection pipe.

6. The carbon dioxide-based ion-adsorption rare earth ore in-situ leaching mining system according to claim 5, characterized in that, It also includes a controller, which is connected to the carbon dioxide generator, the gas collecting pump, the mother liquor collecting device, the carbon dioxide booster pump, the leaching liquid booster pump, and the gas flow meter.

7. The carbon dioxide-based ion-adsorption rare earth ore in-situ leaching mining system according to claim 1, characterized in that, The air injection pipe, liquid injection pipe, air guide pipe, and liquid collection pipe are all PVC pipes.

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