A metal extraction device and method for the production process of magnesium iron lanthanum

Abstract

The present invention relates to the technical field of metal extraction, and particularly to a metal extraction device and method for the production process of magnesium, iron and lanthanum, including an outer wall cylinder body and a mixing and mass transfer partition plate arranged inside the outer wall cylinder body. The lower part of the mixing and mass transfer partition plate forms a mixing and mass transfer cavity in cooperation with the inner wall of the outer wall cylinder body. An impeller disk is arranged in the mixing and mass transfer cavity, and the liquid in the mixing and mass transfer cavity is stirred by the rotation of the impeller disk. The metal extraction device for the production process of magnesium, iron and lanthanum in the present invention can perform mixing and mass transfer of the extraction liquid and the feed liquid and complete centrifugal separation when extracting rare earth metal lanthanum from the magnesium, iron and lanthanum mixed waste. The two steps are completed simultaneously, which has higher working efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of metal extraction, and specifically to a metal extraction device and method for the production process of magnesium, iron and lanthanum. Background Art

[0002] In the industrial production process, mixed waste containing magnesium, iron and lanthanum is generated. Among them, lanthanum, as a rare earth metal, has a high value, and it is necessary to extract and recover the rare earth metal lanthanum. In the prior art, when extracting lanthanum from the mixed waste of magnesium, iron and lanthanum, first, crushing and roasting treatments are carried out to remove organic substances, then acid leaching and extraction are carried out to obtain the organic phase loaded with lanthanum, and finally reduction preparation is carried out. When carrying out extraction, it is necessary to fully mix and mass transfer the mixed liquid of the extractant system and the feed liquid, and then carry out centrifugal separation to obtain the organic phase loaded with lanthanum. In the prior art, these two steps are usually completed by different devices, and the working efficiency is relatively low. Summary of the Invention

[0003] The purpose of the present invention is to provide a metal extraction device and method for the production process of magnesium, iron and lanthanum, so as to solve the problems raised in the above background art.

[0004] To achieve the above purpose, the present invention provides the following technical solution: A metal extraction device for the production process of magnesium, iron and lanthanum includes an outer wall cylinder and a mixing and mass transfer partition plate arranged inside the outer wall cylinder. Below the mixing and mass transfer partition plate, a mixing and mass transfer chamber is formed by cooperating with the inner wall of the outer wall cylinder. An impeller disk is arranged in the mixing and mass transfer chamber, and the liquid in the mixing and mass transfer chamber is stirred by the rotation of the impeller disk.

[0005] An extraction and separation drum is arranged inside the outer wall cylinder. A round hole is penetrated through the center position of the mixing and mass transfer partition plate. The lower end of the extraction and separation drum is hermetically fitted with the round hole at the center of the mixing and mass transfer partition plate and can rotate relatively. The liquid in the mixing and mass transfer chamber will enter the extraction and separation drum under the drive of pressure to achieve extraction and separation.

[0006] An inlet pipeline is arranged at the bottom of the outer wall cylinder. The number of the inlet pipelines is at least two. The inlet pipelines are respectively communicated with the mixing and mass transfer chamber. A synchronous opening and closing loop is arranged in the mixing and mass transfer chamber. When the synchronous opening and closing loop moves downward, the communication ports between the inlet pipelines and the mixing and mass transfer chamber can be simultaneously closed.

[0007] An inner side support arm is fixedly arranged on the surface of the synchronous opening and closing loop. A sealing coupling shaft is fixedly arranged on the inner side support arm. The sealing coupling shaft penetrates through the bottom of the outer wall cylinder and extends to the outside of the outer wall cylinder. The sealing coupling shaft is in sealing contact with the bottom of the outer wall cylinder.

[0008] A split bottom shell is provided below the outer wall cylinder body. A bottom shell side plate is fixedly arranged on the surface of the split bottom shell. The bottom shell side plate is fixedly connected to the sealing coupling shaft. A central bottom column is fixedly arranged at the lower part of the split bottom shell. A downward pressure spring is arranged at the upper part of the split bottom shell. The downward pressure spring applies an elastic pressure to the split bottom shell, so that the split bottom shell and the synchronous open-closed loop have an elastic tendency to move downward.

[0009] A pressure connecting pipe is communicated and arranged on the surface of each liquid inlet pipe. The other end of the pressure connecting pipe is communicated and arranged with a pressure sensing cavity. A pressure sensing piston is arranged in the pressure sensing cavity. The pressure sensing piston is in sliding and sealing contact with the pressure sensing cavity. A piston spring is arranged on one side of the pressure sensing piston away from the position where the pressure connecting pipe is located. The piston spring applies an elastic pressure to make the pressure sensing piston have an elastic tendency to move towards the direction where the pressure connecting pipe is located.

[0010] An axial plate is fixedly arranged on the surface of the pressure sensing piston. A limiting vertical plate is fixedly arranged outside the pressure sensing cavity. The axial plate is limited and inserted through the limiting vertical plate. A folding plate is fixedly arranged at the end of the axial plate. A limiting card slot is arranged on the surface of the central bottom column. The folding plate is clamped in the limiting card slot to axially limit the central bottom column.

[0011] When there is positive pressure inside the liquid inlet pipe, the positive pressure pushes the pressure sensing piston to axially move through the pressure connecting pipe, so that the folding plate moves out of the limiting card slot and releases the axial limit on the central bottom column.

[0012] A separating outer cover is fixedly arranged in the split bottom shell. A counterweight is arranged in the separating outer cover. A lifting elastic sheet is arranged between the counterweight and the separating outer cover. The lifting elastic sheet elastically supports the counterweight, so that the counterweight has an elastic supporting force for up and down movement. An electromagnet module is arranged below the counterweight. When the electromagnet module is powered on, it can generate magnetic suction force to attract the counterweight to move downward and strike the surface of the electromagnet module. When the electromagnet module is powered off, the counterweight moves upward under the elastic drive of the lifting elastic sheet and strikes and contacts the upper edge of the separating outer cover.

[0013] A heavy phase flow channel is arranged at the upper part near the edge of the extraction and separation drum. A matching ring eaves is fixedly arranged on the inner wall surface of the outer wall cylinder body. The matching ring eaves is in rotational and sealing contact with the heavy phase flow channel. A heavy phase output pipe is arranged on the surface of the outer wall cylinder body. The heavy phase output pipe is communicated with the matching ring eaves.

[0014] A power shaft is fixedly provided at the upper center position of the extraction and separation drum, a light phase flow channel is opened in the power shaft, a matching swivel is provided on the surface of the power shaft, a sealing ring cover is provided on the outer sleeve of the matching swivel, the matching swivel and the sealing ring cover are in sealing contact and can rotate relative to each other, a light phase output pipe is provided on the surface of the outer wall cylinder, and the light phase output pipe is connected to the light phase flow channel through the sealing ring cover.

[0015] An impeller synchronous shaft is fixedly provided at the center of the impeller disc, and the upper portion of the impeller synchronous shaft is fixedly installed with the extraction separation drum, and the rotation of the extraction separation drum drives the impeller disc to rotate;

[0016] An extraction outer frame is fixedly provided on the outside of the outer wall cylinder, and a driving component is installed on the extraction outer frame. The driving component is used to drive the power shaft to rotate, and the extraction separation drum is driven to rotate through the power shaft.

[0017] A method for using a metal extraction device in a magnesium iron lanthanum production process, the method comprising the following steps:

[0018] Step 1: Input the mixed solution of the extractant system through the liquid inlet pipe, and input the feed liquid through another liquid inlet pipe to ensure that the lanthanum in the feed liquid exists in the form of trivalent lanthanum ions, and control the flow rate according to the ratio of the two;

[0019] Step 2: When passing through the mixing and mass transfer chamber, the lanthanum ions are fully contacted under high shear force and selectively extracted into the organic phase;

[0020] Step 3: Complete centrifugal separation in the extraction separation drum, collect the lanthanum-loaded organic phase through the light phase output pipe, and collect the magnesium- and iron-containing raffinate through the heavy phase output pipe.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The metal extraction device of the present invention is used in the production process of magnesium iron lanthanum. When extracting rare earth metal lanthanum from magnesium iron lanthanum mixed waste, the extract liquid and the feed liquid can be mixed and mass transferred, and centrifugal separation can be completed. The two steps are completed simultaneously with higher work efficiency.

[0023] The present invention cooperates with the structures such as the synchronous opening and closing loop, the pressure-sensing chamber and the central bottom column to ensure that the extraction liquid and the feed liquid are input at the same time when they are input through the liquid inlet pipe. When there is a time error between the supply of the extraction liquid and the feed liquid, the present invention can avoid a single liquid from entering the mixed mass transfer chamber first, thereby improving the extraction quality and reducing the loss of the extraction liquid and the feed liquid.

[0024] With the cooperation of structures such as the set separation outer cover, counterweight, and electromagnet module, after the synchronous open-closed loop is activated, it can drive the synchronous open-closed loop to oscillate up and down at high frequency. When the liquid output from the liquid inlet pipe sprays onto the lower surface of the synchronous open-closed loop, the synchronous open-closed loop can disperse the liquid through oscillation, improving the mixing effect of the two phases. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0026] Figure 2 It is a schematic diagram of a half-section of the present invention.

[0027] Figure 3 It is Figure 2 An enlarged schematic diagram of area A in

[0028] Figure 4 It is Figure 2 An enlarged schematic diagram of area B in

[0029] Figure 5 It is a front view of a half-section of the present invention.

[0030] Figure 6 It is Figure 5 An enlarged schematic diagram of area C in

[0031] In the figure: 1, outer wall cylinder; 2, mixing and mass transfer partition; 3, impeller disc; 4, extraction and separation drum; 5, liquid inlet pipe; 6, synchronous open-closed loop; 601, inner support arm; 602, sealed coupling shaft; 603, split bottom shell; 604, bottom shell side plate; 605, central bottom column; 606, downward pressure spring; 607, pressure communication pipe; 608, pressure sensing cavity; 609, pressure sensing piston; 610, piston spring; 611, axial plate; 612, limiting vertical plate; 613, folding back plate; 614, limiting card slot; 615, separation outer cover; 616, counterweight; 617, lifting spring piece; 618, electromagnet module; 301, impeller synchronous shaft; 401, heavy phase flow channel; 402, matching ring eaves; 403, heavy phase output pipe; 404, power rotating shaft; 405, light phase flow channel; 406, matching rotating joint; 407, sealing ring cover; 408, light phase output pipe; 101, extraction outer frame; 102, driving component. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0033] Please refer toFigures 1 to 6 , the present invention provides a technical solution: a metal extraction device used in the production process of magnesium iron lanthanum, as Figure 4 shown in the figure, including an outer wall cylinder 1 and a mixing mass transfer partition 2 arranged inside the outer wall cylinder 1. A mixing mass transfer cavity is formed below the mixing mass transfer partition 2 by cooperating with the inner wall of the outer wall cylinder 1. An impeller disk 3 is arranged in the mixing mass transfer cavity. Turbulence blades are arranged on the surface of the impeller disk 3. The liquid in the mixing mass transfer cavity is stirred by the rotation of the impeller disk 3 to achieve mixing mass transfer.

[0034] An extraction separation drum 4 is arranged inside the outer wall cylinder 1. The extraction separation drum 4 is a cylindrical cavity structure, and the lower end of the extraction separation drum 4 is open.

[0035] A circular hole is penetrated through the center position of the mixing mass transfer partition 2. The lower end of the extraction separation drum 4 is hermetically fitted with the circular hole at the center of the mixing mass transfer partition 2 and can rotate relatively. The liquid in the mixing mass transfer cavity will enter the extraction separation drum 4 under the drive of pressure to achieve extraction separation. At least two liquid inlet pipes 5 are arranged at the bottom of the outer wall cylinder 1. The liquid inlet pipes 5 are respectively communicated with the mixing mass transfer cavity. A synchronous opening and closing loop 6 is arranged in the mixing mass transfer cavity. When the synchronous opening and closing loop 6 moves downward, the communication ports between the liquid inlet pipes 5 and the mixing mass transfer cavity can be simultaneously closed, as Figure 4 shown in the figure.

[0036] As Figure 4 shown in the figure, an inner side arm 601 is fixedly arranged on the surface of the synchronous opening and closing loop 6. A sealing coupling shaft 602 is fixedly arranged on the inner side arm 601. The sealing coupling shaft 602 penetrates through the bottom of the outer wall cylinder 1 and extends to the outside of the outer wall cylinder 1. There is a sealed contact between the sealing coupling shaft 602 and the bottom of the outer wall cylinder 1. A split bottom shell 603 is arranged below the outer wall cylinder 1. A bottom shell side plate 604 is fixedly arranged on the surface of the split bottom shell 603. The bottom shell side plate 604 is fixedly connected with the sealing coupling shaft 602. A central bottom column 605 is fixedly arranged at the lower part of the split bottom shell 603. A downward pressure spring 606 is arranged at the upper part of the split bottom shell 603. The upper end of the downward pressure spring 606 is in pressing contact with the bottom of the outer wall cylinder 1. The downward pressure spring 606 applies an elastic pressure to the split bottom shell 603, so that the split bottom shell 603 and the synchronous opening and closing loop 6 have an elastic tendency to move downward.

[0037] A pressure communication pipe 607 is connected to the surface of each liquid inlet pipe 5. The other end of the pressure communication pipe 607 is connected to a pressure sensing chamber 608. A pressure sensing piston 609 is arranged in the pressure sensing chamber 608. The pressure sensing piston 609 is in sliding and sealing contact with the pressure sensing chamber 608. On one side of the pressure sensing piston 609 away from the position where the pressure communication pipe 607 is located, a piston spring 610 is arranged. The elastic pressure exerted by the piston spring 610 makes the pressure sensing piston 609 have an elastic tendency to move towards the direction where the pressure communication pipe 607 is located.

[0038] An axial plate 611 is fixedly arranged on the surface of the pressure sensing piston 609. A limiting vertical plate 612 is fixedly arranged outside the pressure sensing chamber 608. The axial plate 611 is limited and inserted through the limiting vertical plate 612. A folding plate 613 is fixedly arranged at the end of the axial plate 611. A limiting card slot 614 is opened on the surface of the central bottom column 605. The folding plate 613 is clamped in the limiting card slot 614 to axially limit the central bottom column 605. When there is positive pressure inside the liquid inlet pipe 5, the positive pressure pushes the pressure sensing piston 609 to move axially through the pressure communication pipe 607, so that the folding plate 613 moves out of the limiting card slot 614, releasing the axial limit on the central bottom column 605.

[0039] A partition outer cover 615 is fixedly arranged in the split bottom shell 603. A counterweight 616 is arranged in the partition outer cover 615. A lifting elastic sheet 617 is arranged between the counterweight 616 and the partition outer cover 615. The counterweight 616 is elastically supported by the lifting elastic sheet 617, so that the counterweight 616 has an elastic supporting force for up and down movement. An electromagnet module 618 is arranged below the counterweight 616. When the electromagnet module 618 is powered on, it can generate magnetic suction force to attract the counterweight 616 to move downward and strike the surface of the electromagnet module 618. When the electromagnet module 618 is powered off, the counterweight 616 moves upward under the elastic drive of the lifting elastic sheet 617 and strikes and contacts the upper edge of the partition outer cover 615.

[0040] As Figure 3 shown in, a heavy phase flow channel 401 is opened at a position near the edge at the upper part of the extraction separation drum 4. A matching ring eaves 402 is fixedly arranged on the inner wall surface of the outer wall cylinder 1. The matching ring eaves 402 is in rotational fit and sealing contact with the heavy phase flow channel 401. A heavy phase output pipe 403 is arranged on the surface of the outer wall cylinder 1. The heavy phase output pipe 403 is connected to the matching ring eaves 402. A power rotating shaft 404 is fixedly arranged at the central position at the upper part of the extraction separation drum 4. A light phase flow channel 405 is opened in the power rotating shaft 404. A matching rotating joint 406 is arranged on the surface of the power rotating shaft 404. A sealing ring cover 407 is sleeved outside the matching rotating joint 406. The matching rotating joint 406 and the sealing ring cover 407 are in sealing contact and can rotate relative to each other. A light phase output pipe 408 is arranged on the surface of the outer wall cylinder 1. The light phase output pipe 408 is connected to the light phase flow channel 405 through the sealing ring cover 407.

[0041] A central position of the impeller disk 3 is fixedly provided with an impeller synchronizing shaft 301. The upper part of the impeller synchronizing shaft 301 is fixedly installed with the extraction separation drum 4, and the rotation of the extraction separation drum 4 drives the impeller disk 3 to rotate; an extraction outer frame 101 is fixedly provided outside the outer wall cylinder 1, and a driving component 102 is installed on the extraction outer frame 101. The driving component 102 is used to drive the power rotating shaft 404 to rotate, and the rotation of the power rotating shaft 404 drives the extraction separation drum 4 to rotate. The driving component 102 can adopt equipment such as a motor.

[0042] A method for using a metal extraction device in the production process of magnesium-iron-lanthanum, the method comprising the following steps:

[0043] Step 1, input the mixed liquid of the extractant system through the liquid inlet pipe 5, and input the feed liquid through another liquid inlet pipe 5, ensure that the lanthanum in the feed liquid exists in the form of trivalent lanthanum ions, and control the flow rate according to the ratio of the two;

[0044] Step 2, when passing through the mixing mass transfer chamber, fully contact under high-speed shear force, and the lanthanum ions are selectively extracted into the organic phase;

[0045] Step 3, complete centrifugal separation in the extraction separation drum 4, connect and take the organic phase loaded with lanthanum through the light phase output pipe 408, and connect and take the raffinate containing magnesium and iron through the heavy phase output pipe 403.

[0046] The metal extraction device for the production process of magnesium-iron-lanthanum in the present invention inputs the mixed liquid of the extractant system and the feed liquid respectively under positive pressure through two liquid inlet pipes 5; as Figure 4 and Figure 6 shown, when there is a time difference between the input times of the mixed liquid of the extractant system and the feed liquid, at this time only one of the liquid inlet pipes 5 is in a positive pressure state. The positive pressure in the liquid inlet pipe 5 enters the pressure sensing chamber 608 through the pressure connecting pipe 607, pushes the pressure sensing piston 609 to axially move, so that the folding plate 613 moves out of the limit card slot 614, but the folding plate 613 corresponding to the other liquid inlet pipe 5 still remains stuck in the limit card slot 614. At this time, the central bottom column 605 is still in a locked state, and the synchronous open and closed loop 6 cannot move up and open. Therefore, when there is a time difference between the input times of the mixed liquid and the feed liquid, it is avoided that a single liquid enters the mixing mass transfer chamber first, improving the extraction quality and reducing the loss of the extraction liquid and the feed liquid;

[0047] Only when both liquid inlet pipes 5 are under positive pressure and drive the folding plate 613 to move out of the limit card slot 614, the central bottom column 605 will be completely unlocked. At this time, the synchronous open and closed loop 6 can be pushed up and opened by the liquid pressure, so that both liquid inlet pipes 5 input liquid into the mixing mass transfer chamber at the same time. The extraction separation drum 4 and the impeller disk 3 are in a high-speed rotation state, and the liquid in the mixing mass transfer chamber is mixed by the impeller disk 3.

[0048] During the process that the synchronous open-closed loop 6 is pushed open by the liquid pressure, the liquid pressure overcomes the elastic force of the downward pressure spring 606, causing the downward pressure spring 606 to be compressed by a certain stroke; a pulsed intermittent current is input into the electromagnet module 618, causing the electromagnet module 618 to generate intermittent magnetic force; when the electromagnet module 618 generates magnetic force, the electromagnet module 618 can attract the counterweight 616 to impact and move downward until the counterweight 616 hits the upper surface position of the electromagnet module 618. When the magnetic force of the electromagnet module 618 disappears, the counterweight 616 is elastically reset upward under the elastic support of the lifting spring piece 617, as Figure 6 shown in the figure, the upper part of the partition outer cover 615 has an inwardly bent eaves, and the counterweight 616 will hit and contact the upper eaves of the partition outer cover 615 during the upward elastic reset movement; the above high-frequency cycle causes the structures such as the central bottom column 605 and the synchronous open-closed loop 6 to be subjected to high-frequency impact forces of up and down oscillations. At this time, the synchronous open-closed loop 6 is in a state of high-frequency oscillation up and down. When the liquid ejected from the liquid inlet pipe 5 sprays onto the surface of the synchronous open-closed loop 6, through the high-frequency oscillation of the synchronous open-closed loop 6, it can promote the liquid dispersion and improve the mixing effect of the two phases.

[0049] With the continuous input of the liquid inlet pipe 5, the liquid will enter the extraction separation drum 4 under the drive of the pressure; the extraction separation drum 4 separates the liquid into a light phase and a heavy phase by the centrifugal force generated by high-speed rotation; as Figure 3 shown in the figure, the heavy phase is output externally through the heavy phase flow channel 401 and the heavy phase output pipe 403, and the light phase enters the sealing ring cover 407 through the light phase flow channel 405 and is finally output through the light phase output pipe 408.

[0050] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A metal extraction device for use in the production of magnesium iron and lanthanum, comprising an outer wall cylinder and a mixing and mass transfer baffle disposed within the outer wall cylinder, characterized in that: The mixing mass transfer cavity is formed by cooperating with the inner wall of the outer wall cylinder below the mixing mass transfer baffle. The mixing mass transfer cavity is provided with an impeller disk, and the liquid in the mixing mass transfer cavity is stirred by the rotation of the impeller disk. An extraction and separation drum is provided inside the outer wall cylinder, a circular hole is formed through the center of the mixing and mass transfer partition, and the lower end of the extraction and separation drum is sealed and matched with the circular hole in the center of the mixing and mass transfer partition, and can rotate relative to each other; the liquid in the mixing and mass transfer chamber enters the extraction and separation drum under pressure to achieve extraction and separation; A liquid inlet pipe is provided at the bottom of the outer wall cylinder, and the number of the liquid inlet pipes is at least two, and the liquid inlet pipes are respectively connected to the mixing mass transfer chamber. A synchronous opening and closing loop is provided in the mixing mass transfer chamber. When the synchronous opening and closing loop moves downward, the communication port between the liquid inlet pipe and the mixing mass transfer chamber can be closed at the same time; The surface of the synchronous opening and closing ring is fixedly provided with an inner support arm, and a sealing coupling is fixedly provided on the inner support arm, and the sealing coupling is inserted through the bottom of the outer wall cylinder and extends to the outside of the outer wall cylinder; a split bottom shell is provided below the outer wall cylinder, and a bottom shell side plate is fixedly provided on the surface of the split bottom shell, and the bottom shell side plate and the sealing coupling are fixed to each other, and a central bottom column is fixedly provided at the lower part of the split bottom shell, and a downward pressure spring is provided at the upper part of the split bottom shell; the surface of each of the liquid inlet pipes is connected to a pressure connecting pipe, and the other end of the pressure connecting pipe is connected to a pressure sensing chamber, and a pressure sensing chamber is provided A pressure-sensitive piston is provided, and the pressure-sensitive piston is in sliding and sealing contact with the pressure-sensitive chamber. A piston spring is provided on the side of the pressure-sensitive piston away from the position of the pressure connecting pipe. The elastic pressure applied by the piston spring makes the pressure-sensitive piston have an elastic tendency to move toward the direction of the pressure connecting pipe. An axial plate is fixedly provided on the surface of the pressure-sensitive piston, and a limit vertical plate is fixedly provided on the outside of the pressure-sensitive chamber. The axial plate is limited and inserted through the limit vertical plate. A folding plate is fixedly provided on the end of the axial plate. A limit slot is provided on the surface of the central bottom column. The folding plate is clamped in the limit slot to axially limit the central bottom column. When the internal pressure of the liquid inlet pipe is positive, the positive pressure pushes the pressure-sensing piston to move axially through the pressure connecting pipe, so that the folding plate moves out of the limit slot, releasing the axial limit on the center base column.

2. The metal extraction device for use in the production process of magnesium iron lanthanum according to claim 1, characterized in that: The sealing coupling is in sealing contact with the bottom of the outer wall cylinder.

3. The metal extraction device for use in the production process of magnesium iron lanthanum according to claim 2, characterized in that: The downward pressure spring applies elastic pressure to the split bottom shell, so that the split bottom shell and the synchronous opening and closing ring have an elastic tendency to move downward.

4. The metal extraction device for use in the production process of magnesium iron lanthanum according to claim 3, characterized in that: A partition cover is fixedly provided in the split bottom shell, a counterweight block is provided in the partition cover, a lifting spring is provided between the counterweight block and the partition cover, the counterweight block is elastically supported by the lifting spring, so that the counterweight block has an elastic supporting force for moving up and down, and an electromagnet module is provided below the counterweight block; when the electromagnet module is energized, it can generate magnetic attraction to attract the counterweight block to move downward and collide with the surface of the electromagnet module; when the electromagnet module is de-energized, the counterweight block moves upward under the elastic drive of the lifting spring and collides with the upper eaves of the partition cover.

5. The metal extraction device for use in the production process of magnesium iron lanthanum according to claim 1, characterized in that: A heavy phase flow channel is provided on the upper part of the extraction separation drum near the edge, a matching annular rim is fixedly provided on the inner wall surface of the outer wall cylinder, the matching annular rim is rotationally matched and in sealed contact with the heavy phase flow channel, a heavy phase output pipe is provided on the surface of the outer wall cylinder, and the heavy phase output pipe is connected to the matching annular rim.

6. The metal extraction device for use in the production process of magnesium iron lanthanum according to claim 5, characterized in that: A power shaft is fixedly provided at the upper center position of the extraction and separation drum, a light phase flow channel is opened in the power shaft, a matching swivel is provided on the surface of the power shaft, a sealing ring cover is provided on the outer sleeve of the matching swivel, the matching swivel and the sealing ring cover are in sealing contact and can rotate relative to each other, a light phase output pipe is provided on the surface of the outer wall cylinder, and the light phase output pipe is connected to the light phase flow channel through the sealing ring cover.

7. The metal extraction device for use in the production process of magnesium iron lanthanum according to claim 6, characterized in that: An impeller synchronous shaft is fixedly provided at the center of the impeller disc, and the upper portion of the impeller synchronous shaft is fixedly installed with the extraction separation drum, and the rotation of the extraction separation drum drives the impeller disc to rotate; An extraction outer frame is fixedly provided on the outside of the outer wall cylinder, and a driving component is installed on the extraction outer frame. The driving component is used to drive the power shaft to rotate, and the extraction separation drum is driven to rotate through the power shaft.

8. The method for using the metal extraction device in the production process of magnesium iron lanthanum according to claim 6 or 7, characterized in that: The method comprises the following steps: Step 1: Input the mixed solution of the extractant system through the liquid inlet pipe, and input the feed liquid through another liquid inlet pipe to ensure that the lanthanum in the feed liquid exists in the form of trivalent lanthanum ions, and control the flow rate according to the ratio of the two; Step 2: When passing through the mixing and mass transfer chamber, the lanthanum ions are fully contacted under high shear force and selectively extracted into the organic phase; Step 3: Complete centrifugal separation in the extraction separation drum, collect the lanthanum-loaded organic phase through the light phase output pipe, and collect the magnesium- and iron-containing raffinate through the heavy phase output pipe.

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