High-aluminum waste residue rare earth separation and recovery equipment

Abstract

The utility model discloses a kind of high-aluminum waste residue rare earth separation and recovery equipment, it is related to rare earth resource recovery equipment field, including the reaction unit, extraction unit and back extraction unit that are sequentially communicated, still include pretreatment unit, the discharge port of pretreatment unit is connected with reaction unit;Pretreatment unit includes cleaning tank, lye storage tank is connected with cleaning tank, first stirring subassembly is through cleaning tank top and extends to cleaning tank, constant-temperature heating component is connected with cleaning tank, first discharge valve is located between cleaning tank and reaction unit, first thermometer is located in cleaning tank, and is electrically connected with constant-temperature heating component;This kind of high-aluminum waste residue rare earth separation and recovery equipment by targeted pretreatment unit, can realize the efficient dissolution of rare earth element in high-aluminum waste residue, purification and enrichment, solve the technical problem of low recovery efficiency of existing equipment, product purity is insufficient.

Description

Technical Field

[0001] This utility model relates to the field of rare earth resource recycling equipment, specifically a rare earth separation and recycling equipment for high-alumina waste residue. Background Technology

[0002] Rare earth elements play an irreplaceable role in electronics, aerospace, and new energy fields due to their unique physicochemical properties. High-alumina waste slag is a solid waste generated by industries such as rare earth smelting and aluminum processing, which contains a certain amount of rare earth elements. The rare earth elements in high-alumina waste slag can be separated to achieve rare earth recycling.

[0003] However, due to the high content and dense structure of aluminum oxides in the waste residue, and the fact that rare earth elements mostly exist in the form of inclusions or isomorphic forms, it is difficult to dissolve rare earth elements and the dissolution efficiency is low. At the same time, a large amount of impurities such as aluminum and iron are easily dissolved during the recycling process, resulting in low rare earth recovery rate and insufficient product purity. Utility Model Content

[0004] The purpose of this invention is to provide a rare earth separation and recycling device for high-alumina waste residue. This device, through a targeted pretreatment unit, can achieve efficient leaching, purification, and enrichment of rare earth elements in high-alumina waste residue, thus solving the technical problems of low recycling efficiency and insufficient product purity in existing equipment.

[0005] The above-mentioned optimized structure of this utility model is achieved through the following technical solution: a high-alumina waste slag rare earth separation and recycling device, including a reaction unit, an extraction unit and a back-extraction unit connected in sequence, and a pretreatment unit, wherein the outlet of the pretreatment unit is connected to the reaction unit. The pretreatment unit includes a cleaning tank; An alkaline solution storage tank, which is connected to the cleaning tank; A first stirring assembly extends through the top of the cleaning tank and into the cleaning tank; A constant temperature heating component is connected to the cleaning tank; A first discharge valve is located between the cleaning tank and the reaction unit; A first thermometer is installed inside the cleaning tank and is electrically connected to the constant temperature heating assembly.

[0006] Preferably, the reaction unit includes a reaction vessel, which is connected to the first discharge valve; An acid-base adjustment component, which is connected to the reaction vessel; The second discharge valve is located between the reactor and the extraction unit; The second stirring assembly extends through the top of the reactor and into the reactor.

[0007] Preferably, the acid-base adjustment assembly includes a mixing tank, which is connected to the reaction vessel; An acid storage tank, which is connected to the mixing tank; An alkali solution storage tank, which is connected to the mixing tank; The pH online monitoring instrument is connected to the mixing tank.

[0008] Preferably, the acid-base adjustment assembly further includes two regulating valves, which are respectively located between the acid storage tank and the mixed solution tank, and between the alkali storage tank and the mixed solution tank, and are electrically connected to the pH online monitoring instrument.

[0009] Preferably, the extraction unit includes an extraction tower, which is connected to the reaction unit; An extractant storage tank is connected to the extraction tower; Extract discharge valve, wherein the extract discharge valve is located at the bottom of the extraction tower; An organic phase outlet valve is provided at the bottom of the extraction tower; A third stirring assembly extends through the top of the extraction tower and into the interior of the extraction tower.

[0010] Preferably, the extraction unit further includes a first flow controller, which is located between the extraction tower and the reaction unit; A second flow controller is located between the extraction tower and the extractant tank and is electrically connected to the first flow controller.

[0011] Preferably, the extraction unit further includes a pressure sensor, which is located inside the extraction tower.

[0012] Preferably, the back-extraction unit includes a back-extraction vessel, which is connected to the extraction unit; A back-extraction solution storage tank, which is connected to the back-extraction vessel; A fourth stirring assembly extends through the top of the back-extraction vessel and into the interior of the back-extraction vessel; A heating assembly connected to the back-extraction vessel; A second thermometer is inserted into the back-extraction vessel and is electrically connected to the heating assembly; The finished product discharge valve is located at the bottom of the back-extraction vessel.

[0013] Preferably, the back-extraction unit further includes a rare earth concentration detector, which is located inside the back-extraction vessel and electrically connected to the finished product discharge valve.

[0014] In summary, this utility model has the following beneficial effects: (1) By adding a pretreatment unit, this utility model combines alkaline cleaning liquid with precise temperature control and stirring to effectively remove impurities on the surface of high-alumina waste residue and break the dense structure, thereby improving the rare earth leaching efficiency and increasing resource utilization.

[0015] (2) The reaction unit of this utility model can achieve automatic and precise control of acidity and alkalinity through the linkage of pH online monitoring instrument and dual regulating valve, which can ensure the efficient dissolution of rare earth while inhibiting the dissolution of impurities and improving the purity of rare earth leachate. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the reaction unit of this utility model; Figure 3 This is a schematic diagram of the extraction unit of this utility model; Figure 4 This is a schematic diagram of the back-extraction unit of this utility model; Figure 5 This is a schematic diagram of the preprocessing unit of this utility model.

[0017] In the diagram: 1. Reaction unit; 11. Reactor; 12. Acid-base adjustment assembly; 121. Mixing tank; 122. Acid storage tank; 123. Alkali storage tank; 124. Online pH monitor; 125. Adjusting valve; 13. Second discharge valve; 14. Second stirring assembly; 2. Extraction unit; 21. Extraction tower; 22. Extractant storage tank; 23. Extract discharge valve; 24. Organic phase outlet valve; 25. Third stirring assembly; 26. First flow control. 27. Second flow controller; 28. Pressure sensor; 3. Back-extraction unit; 31. Back-extraction kettle; 32. Back-extraction liquid storage tank; 33. Fourth stirring assembly; 34. Heating assembly; 35. Second thermometer; 36. Finished product discharge valve; 37. Rare earth concentration detector; 4. Pretreatment unit; 41. Washing tank; 42. Alkali liquid storage tank; 43. First stirring assembly; 44. Constant temperature heating assembly; 45. First discharge valve; 46. First thermometer. Detailed Implementation

[0018] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0019] refer to Figure 1-5 A rare earth separation and recycling device for high-alumina waste residue includes a pretreatment unit 4, a reaction unit 1, an extraction unit 2 and a back-extraction unit 3 connected in sequence. Each unit realizes the orderly transportation of materials through pipelines and valves, forming a complete rare earth separation and recycling system.

[0020] Pretreatment unit 4 includes a cleaning tank 41, an alkali storage tank 42, a first stirring assembly 43, a constant temperature heating assembly 44, a first discharge valve 45, and a first thermometer 46. The alkali storage tank 42 is connected to the top side of the cleaning tank 41 via a corrosion-resistant supply pipeline. The alkali storage tank 42 stores sodium hydroxide or potassium hydroxide alkaline cleaning solution and can quantitatively replenish the alkali reaction medium into the cleaning tank 41. The first stirring assembly 43 may include a variable frequency motor fixed to the top of the cleaning tank 41, a stainless steel stirring shaft penetrating the top wall of the cleaning tank 41 and extending to the bottom of the tank, and an anchor-type blade fixed to the end of the stirring shaft. The variable frequency motor can drive the stirring shaft to rotate the blade. The stirring rate can be adjusted within the range of 300-500 r / min to ensure that the high-alumina waste residue and alkaline cleaning solution are fully in contact and react. The constant temperature heating component 44 can be an electric heating jacket that fits and wraps around the outer wall of the cleaning tank 41, with a power of 3-5 kW, which can provide a stable heat source for the reaction in the cleaning tank 41. The first discharge valve 45 can be a corrosion-resistant pneumatic ball valve, which is located between the discharge port at the bottom of the cleaning tank 41 and the feed pipe of the reaction unit 1, and can control the conveying of the pretreated residue. The detection probe of the first thermometer 46 penetrates the top wall of the cleaning tank 41 and extends into the reaction zone inside the cleaning tank 41. The first thermometer 46 and the constant temperature heating component 44 are electrically connected to form a closed-loop control.

[0021] The reaction temperature inside the cleaning tank 41 can be monitored in real time by the first thermometer 46. When the temperature is below 60℃, the first thermometer 46 sends a heating signal to the constant temperature heating component 44, and the electric heating jacket starts heating. When the temperature is above 85℃, a cooling signal is sent, and the electric heating jacket stops heating, thereby stabilizing the temperature inside the tank in the optimal reaction range of 60-85℃. At the same time, the first stirring component 43 is started, and the high-alumina waste residue is fully mixed with the alkaline cleaning solution by the rotation of the anchor blades. The alkaline environment can not only dissolve more than 90% of the oil and dust impurities on the surface of the waste residue, but also destroy the dense film formed by aluminum oxide, making the structure of the waste residue loose. After the pretreatment reaction for 1.5-2.5 hours, the first discharge valve 45 is automatically opened, and the pretreated residue is transported to the reaction unit 1 through the pipeline under the action of gravity, realizing the orderly connection between the pretreatment and leaching processes.

[0022] Preferably, the reaction unit 1 includes a reaction vessel 11, an acid-base adjustment component 12, a second discharge valve 13, and a second stirring component 14. The reaction vessel 11 can be a sealed container with a polytetrafluoroethylene corrosion-resistant coating on its inner wall. The feed inlet at the top of the reaction vessel 11 is connected to the first discharge valve 45 via a pipeline and can receive the pretreated residue transported by the pretreatment unit 4. The acid-base adjustment component 12 can be connected to one side of the top of the reaction vessel 11 via an adjustment pipeline to regulate the acidity and alkalinity of the reaction system inside the reaction vessel 11. The second discharge valve 13 is a corrosion-resistant pneumatic ball valve with the same structure as the first discharge valve 45. It is located between the discharge inlet at the bottom of the reaction vessel 11 and the feed pipeline of the extraction unit 2 and can control the flow of rare earth leachate. The structure of the second stirring component 14 is the same as that of the first stirring component 43. Its stirring shaft passes through the top wall of the reaction vessel 11 and extends to the middle of the reaction vessel 11. The stirring speed can be 300-400 r / min, which can promote the mixing reaction of the pretreated residue and the dissolving agent and shorten the dissolution time.

[0023] Preferably, the acid-base adjustment assembly 12 includes a mixing tank 121, an acid storage tank 122, an alkali storage tank 123, and an online pH monitor 124. The mixing tank 121 can be a temporary storage tank with two inlets at the top and an outlet at the bottom. The outlet at the bottom of the mixing tank 121 is connected to the reactor 11 through an adjustment pipeline, which can transport the adjusted acid-base mixture to the reactor 11. The acid storage tank 122 can store hydrochloric acid solution and is connected to one of the inlets at the top of the mixing tank 121 through an acid branch pipeline. The alkali storage tank 123 can store sodium hydroxide solution and is connected to the other inlet at the top of the mixing tank 121 through an alkali branch pipeline. The detection probe of the online pH monitor 124 penetrates the top wall of the mixing tank 121 and extends into the liquid inside the tank to monitor the acidity and alkalinity of the mixture in the mixing tank 121 in real time.

[0024] Preferably, the acid-base regulating component 12 further includes two regulating valves 125, both of which can be electromagnetic proportional valves, respectively located on the acid branch pipeline between the acid storage tank 122 and the mixing tank 121, and on the alkali branch pipeline between the alkali storage tank 123 and the mixing tank 121, and both regulating valves 125 are electrically connected to the pH online monitoring instrument 124.

[0025] The pH value of the solution in the mixing tank 121 is collected in real time by the pH online monitoring instrument 124. When the pH value is higher than 3.5, the pH online monitoring instrument 124 sends an opening signal to the regulating valve 125 of the acid branch to control the quantitative flow of hydrochloric acid solution into the mixing tank 121 until the pH value drops to the optimal dissolution range of 1.5-3.5. When the pH value is lower than 1.5, an opening signal is sent to the regulating valve 125 of the alkaline branch to control the quantitative flow of sodium hydroxide solution, so as to achieve automatic and precise adjustment of acidity and alkalinity. The adjusted mixture is continuously fed into the reaction vessel 11 through the pipeline. With the stirring action of the second stirring component 14, the acidity and alkalinity of the reaction system are made uniform and stable, which promotes the efficient dissolution of rare earth elements while inhibiting the dissolution of impurity ions such as aluminum and iron.

[0026] Preferably, the extraction unit 2 includes an extraction tower 21, an extractant storage tank 22, an extract discharge valve 23, an organic phase outlet valve 24, and a third stirring assembly 25. The extraction tower 21 can be a stainless steel tower body. The feed inlet in the middle of the extraction tower 21 can be sealed and connected to the second discharge valve 13 through a pipeline to receive rare earth leachate. The extractant storage tank 22 stores a novel phosphine extractant, preferably a P507 modified extractant, and is connected to the feed inlet at the top of the extraction tower 21 through an extractant pipeline to replenish the extraction medium into the extraction tower 21. The extract discharge valve 23 can be a corrosion-resistant ball valve and is located at the extraction... At the raffinate outlet on one side of the bottom of the tower 21, the extracted impurity aqueous phase is discharged. The organic phase outlet valve 24 is a corrosion-resistant ball valve with the same structure as the raffinate outlet valve 23. It is located at the loaded organic phase outlet on the other side of the bottom of the extraction tower 21 to discharge the rare earth-enriched organic phase. The third stirring assembly 25 may include a variable frequency motor fixed to the top of the extraction tower 21, a stirring shaft that penetrates the top wall of the extraction tower 21 and extends to the middle of the tower, and a turbine blade fixed to the end of the stirring shaft. The stirring speed is 300-500 r / min, which can enhance the contact mass transfer between the organic phase and the aqueous phase.

[0027] Preferably, the extraction unit 2 further includes a first flow controller 26 and a second flow controller 27. The first flow controller 26 is located on the feed pipeline between the extraction tower 21 and the reaction unit 1 and can monitor the feed flow rate of the rare earth leachate in real time. The second flow controller 27 can be located on the extractant pipeline between the extraction tower 21 and the extractant storage tank 22, and the second flow controller 27 is electrically connected to the first flow controller 26. The first flow controller 26 and the second flow controller 27 can be electromagnetic flow meters.

[0028] The first flow controller 26 collects the real-time flow signal of the rare earth leachate and transmits the signal to the second flow controller 27. The second flow controller 27 automatically adjusts the feed flow of the extractant according to the preset volume ratio of extractant to liquid to ensure accurate and stable extraction ratio. At the same time, the third stirring component 25 is started. The turbine blades rotate at high speed to fully mix the organic phase and the aqueous phase. Rare earth ions undergo complexation reaction with the extractant and are transferred to the organic phase, while impurity ions such as aluminum and iron remain in the aqueous phase, achieving efficient separation of rare earth and impurities.

[0029] Preferably, the extraction unit 2 further includes a pressure sensor 28, the detection end of which is located on the inner wall of the middle part of the extraction tower 21, and can monitor the pressure inside the extraction tower 21 in real time.

[0030] The pressure inside the extraction column 21 is fed back in real time by pressure sensor 28. When the pressure is higher than 0.3 MPa, the pressure is released through the vent valve at the top of the column; when the pressure is lower than 0.1 MPa, the pressure is replenished through the gas supply valve, so that the pressure inside the column is maintained in a stable range of 0.1-0.3 MPa. This avoids two-phase emulsification caused by pressure fluctuations, ensures rapid stratification of the organic and aqueous phases after extraction, and improves extraction efficiency. The vent valve and gas supply valve are standard features of the extraction column 21 and are existing technologies, so they will not be described in detail here.

[0031] Preferably, the back-extraction unit 3 includes a back-extraction vessel 31, a back-extraction liquid storage tank 32, a fourth stirring assembly 33, a heating assembly 34, a second thermometer 35, and a finished product discharge valve 36. The back-extraction vessel 31 can be a sealed container with an inner wall lined with a polytetrafluoroethylene corrosion-resistant coating. The top inlet of the back-extraction vessel 31 is sealed and connected to the organic phase outlet valve 24 via a pipeline to receive the loaded organic phase. The back-extraction liquid storage tank 32 can store hydrochloric acid back-extraction liquid and is connected to one side of the top of the back-extraction vessel 31 via a back-extraction liquid pipeline to replenish the back-extraction medium into the back-extraction vessel 31. The fourth stirring assembly 33... The structure is the same as the second stirring component 14, with a stirring rate of 300-400 r / min, which can promote the mixing reaction of the loaded organic phase and the back-extraction liquid. The heating component 34 can be an electric heating jacket that fits and wraps around the outer wall of the back-extraction vessel 31, which can provide a stable heat source for the back-extraction reaction. The detection probe of the second thermometer 35 penetrates through the top wall of the back-extraction vessel 31 and extends into the reaction zone inside the vessel. The second thermometer 35 is electrically connected to the heating component 34. The finished product discharge valve 36 can be a corrosion-resistant pneumatic ball valve, which is located at the bottom discharge port of the back-extraction vessel 31 to control the discharge of high-concentration rare earth liquid.

[0032] The temperature inside the back-extraction vessel 31 is monitored in real time by the second thermometer 35. When the temperature is below 40°C, the second thermometer 35 sends a heating signal to the heating component 34; when the temperature is above 60°C, a cooling signal is sent to stabilize the back-extraction temperature in the optimal range of 40-60°C. The fourth stirring component 33 is started to fully mix the loaded organic phase with the hydrochloric acid back-extraction solution. Rare earth ions react with hydrochloric acid and desorb to the aqueous phase, achieving efficient desorption of rare earth elements.

[0033] Preferably, the back-extraction unit 3 further includes a rare earth concentration detector 37, which can be an inductively coupled plasma mass spectrometer. Its detection probe penetrates the top wall of the back-extraction vessel 31 and extends into the liquid inside the vessel. The rare earth concentration detector 37 is electrically connected to the finished product discharge valve 36.

[0034] The rare earth concentration in the feed solution inside the back-extraction vessel 31 is monitored in real time by a rare earth concentration detector 37. When the concentration reaches the set value of 40-60 g / L, the rare earth concentration detector 37 sends an opening signal to the finished product discharge valve 36, automatically discharging the high-purity rare earth feed solution. When the concentration does not meet the standard, the finished product discharge valve 36 remains closed, and the back-extraction reaction continues to ensure stable product concentration. The regenerated organic phase after back-extraction is discharged through the organic phase recovery valve at the top of the back-extraction vessel 31 and returned to the extractant storage tank 22 for recycling, reducing operating costs.

[0035] The specific working principle is as follows: High-alumina waste residue with a particle size ≤10mm is fed into the cleaning tank 41 through the inlet, and the feed valve is closed. Alkaline cleaning solution is injected into the cleaning tank 41 through the alkaline solution storage tank 42, and the liquid-solid ratio is controlled within the set range. The first stirring component 43 is started, and the constant temperature heating component 44 is started at the same time. The first thermometer 46 provides real-time temperature feedback to stabilize the temperature inside the tank at 60-85℃. After reacting for 1.5-2.5 hours, the alkaline cleaning solution removes more than 90% of the oil and dust on the surface of the waste residue, and at the same time breaks down the dense coating of aluminum oxide, making the structure of the waste residue loose. At this time, the first discharge valve 45 is automatically opened, and the pretreated residue is transported to the reaction vessel 11 through the pipeline. The cleaning waste liquid is discharged through the waste liquid valve at the bottom of the cleaning tank 41.

[0036] The leaching agent is injected into the reaction vessel 11 through the mixing tank 121, and the liquid-solid ratio is controlled within the set range. The second stirring component 14 is started, and the reaction is carried out at 30-50℃ for 2-4 hours. The rare earth elements in the pretreated residue are fully dissolved, and impurity ions such as aluminum and iron are suppressed to a low concentration. After the reaction is completed, the second discharge valve 13 is automatically opened, and the rare earth leachate is metered by the first flow controller 26 and sent to the extraction tower 21. The residual leaching residue in the reaction vessel 11 is discharged through the bottom slag discharge valve. After washing and recovering the residual rare earth, it can be reused as an auxiliary material for building materials.

[0037] The first flow controller 26 transmits the real-time flow signal of the rare earth leachate to the second flow controller 27. The second flow controller 27 automatically adjusts the feed flow rate of the extractant in the extractant storage tank 22 according to the preset volume ratio. The third stirring component 25 is started to ensure that the organic phase extractant and the aqueous phase rare earth leachate are fully mixed and transferred in the extraction tower 21. The pressure sensor 28 monitors the pressure in the tower in real time and maintains the pressure at 0.1-0.3 MPa through the vent valve or gas injection valve at the top of the tower to avoid emulsification of the two phases. Rare earth ions undergo a complexation reaction with the extractant and are transferred to the organic phase to form a loaded organic phase. Aluminum, iron and other impurity ions remain in the aqueous phase to form raffinate. After extraction for 1-2 hours, the raffinate discharge valve 23 is opened to discharge the raffinate. The raffinate is neutralized, filtered and treated by activated carbon adsorption before being discharged in compliance with standards or recycled for pretreatment washing. The organic phase outlet valve 24 is opened to transport the loaded organic phase to the back-extraction vessel 31.

[0038] Hydrochloric acid back-extraction solution from back-extraction solution storage tank 32 is injected into back-extraction kettle 31, and the volume ratio of organic phase to back-extraction solution is controlled within a set range. The fourth stirring component 33 is started, and the heating component 34 is started simultaneously. The second thermometer 35 provides real-time temperature feedback to stabilize the back-extraction temperature at 40-60℃. During the 1-2 hours of back-extraction reaction, rare earth concentration detector 37 continuously monitors the rare earth concentration in the solution. When the concentration reaches the set value, the rare earth concentration detector 37 sends an opening signal to the finished product discharge valve 36, and the high-purity rare earth solution is discharged to the finished product storage tank for subsequent deep processing processes such as rare earth oxide preparation and rare earth alloy smelting. When the concentration does not meet the standard, the finished product discharge valve 36 remains closed, and back-extraction continues until the concentration meets the standard. After back-extraction is completed, the organic phase recovery valve at the top of back-extraction kettle 31 is opened, and the regenerated organic phase is returned to the extractant storage tank 22 for recycling. The extraction efficiency can be maintained by replenishing the corresponding volume fraction of fresh extractant.

[0039] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A rare earth separation and recovery device for high-alumina waste residue, comprising a reaction unit (1), an extraction unit (2), and a back-extraction unit (3) connected in sequence, characterized in that: It also includes a pretreatment unit (4), the outlet of which is connected to the reaction unit (1); The pretreatment unit (4) includes a cleaning tank (41); Alkali solution storage tank (42), which is connected to the cleaning tank (41); A first stirring assembly (43) extends through the top of the cleaning tank (41) and into the cleaning tank (41); A constant temperature heating component (44) is connected to the cleaning tank (41); The first discharge valve (45) is located between the cleaning tank (41) and the reaction unit (1); The first thermometer (46) is located inside the cleaning tank (41) and is electrically connected to the constant temperature heating component (44).

2. The rare earth separation and recycling equipment for high-alumina waste slag according to claim 1, characterized in that: The reaction unit (1) includes a reaction vessel (11), which is connected to the first discharge valve (45); An acid-base adjustment component (12) is connected to the reaction vessel (11); The second discharge valve (13) is located between the reactor (11) and the extraction unit (2); The second stirring assembly (14) extends through the top of the reactor (11) and into the reactor (11).

3. The rare earth separation and recycling equipment for high-alumina waste slag according to claim 2, characterized in that: The acid-base adjustment component (12) includes a mixing tank (121), which is connected to the reaction vessel (11); An acid storage tank (122) is connected to the mixing tank (121); An alkali storage tank (123) is connected to the mixing tank (121); pH online monitoring instrument (124), which is connected to the mixing tank (121).

4. The rare earth separation and recycling equipment for high-alumina waste slag according to claim 3, characterized in that: The acid-base regulating component (12) also includes two regulating valves (125), which are respectively located between the acid storage tank (122) and the mixed liquid tank (121), and between the alkali storage tank (123) and the mixed liquid tank (121), and are electrically connected to the pH online monitoring instrument (124).

5. The rare earth separation and recycling equipment for high-alumina waste slag according to claim 1, characterized in that: The extraction unit (2) includes an extraction tower (21), which is connected to the reaction unit (1); Extractant storage tank (22), which is connected to the extraction tower (21); Extract discharge valve (23), the extract discharge valve (23) is located at the bottom of the extraction tower (21); Organic phase outlet valve (24), the organic phase outlet valve (24) is located at the bottom of the extraction tower (21); The third stirring assembly (25) extends through the top of the extraction tower (21) and into the extraction tower (21).

6. The rare earth separation and recycling equipment for high-alumina waste slag according to claim 5, characterized in that: The extraction unit (2) further includes a first flow controller (26), which is located between the extraction tower (21) and the reaction unit (1); The second flow controller (27) is located between the extraction tower (21) and the extractant tank (22) and is electrically connected to the first flow controller (26).

7. The rare earth separation and recycling equipment for high-alumina waste slag according to claim 5, characterized in that: The extraction unit (2) also includes a pressure sensor (28), which is located inside the extraction tower (21).

8. The rare earth separation and recycling equipment for high-alumina waste slag according to claim 1, characterized in that: The back-extraction unit (3) includes a back-extraction vessel (31), which is connected to the extraction unit (2); A back-extraction liquid storage tank (32) is connected to the back-extraction vessel (31); A fourth stirring assembly (33) extends through the top of the back-extraction vessel (31) and into the back-extraction vessel (31); A heating assembly (34) is connected to the back-extraction vessel (31); The second thermometer (35) is placed inside the back-extraction vessel (31) and is electrically connected to the heating assembly (34); Finished product discharge valve (36) is located at the bottom of the back-extraction vessel (31).

9. The rare earth separation and recycling equipment for high-alumina waste slag according to claim 8, characterized in that: The back-extraction unit (3) also includes a rare earth concentration detector (37), which is located inside the back-extraction kettle (31) and is electrically connected to the finished product discharge valve (36).

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