Molten salt electrolysis device

Abstract

The invention discloses a molten salt electrolysis device, comprising a heating furnace, a connecting shaft, a crucible, a stirring baffle, an electrode and a driving assembly, wherein the heating furnace comprises a bottom wall and a side wall, wherein the bottom wall and the side wall define a furnace cavity, and the bottom wall is provided with a through hole; the connecting shaft passes through the through hole and is rotatable, wherein the upper end is located in the furnace cavity, and the lower end is located below the bottom wall; the crucible is arranged in the furnace cavity and does not contact with the heating furnace, the crucible is fixed at the upper end of the connecting shaft, and the crucible has an upper opening; the stirring baffle passes through the upper opening of the crucible, wherein the lower end is located in the crucible, and the upper end is fixed at the top of the side wall of the heating furnace; the electrode is suspended in the crucible, and there is no contact between the electrode and the crucible and between the electrode and the stirring baffle; the driving assembly is connected to the lower end of the connecting shaft. The molten salt electrolysis device of the invention can realize an automatic mechanical stirring function, greatly reduces the labor intensity of manual labor, and avoids the operation of operators in a dangerous environment. It is not only simple in structure and easy to operate, but also has high electrolysis efficiency and high metal recovery rate.

Description

Technical Field

[0001] The invention relates to the technical field of nonferrous metal material preparation, and in particular to a molten salt electrolysis device. Background Art

[0002] In the molten salt electrolysis method of rare metals and their alloys, the upper cathode method has the disadvantages of tight upper space of the electrolysis device, low production efficiency, low degree of automation, and high labor intensity of workers. Therefore, the liquid cathode molten salt electrolysis method is often used to produce rare metals. This method has the advantages of uniform product composition, high metal recovery rate, low energy consumption, and low cost.

[0003] In the liquid cathode electrolysis process, it is necessary to strictly control the diffusion rate of the rare metals and alloys precipitated from the liquid to the cathode. If the precipitated rare metals and alloys are not diffused in time, a coating layer will be formed on the liquid cathode, which will have an adverse effect on the electrolysis process and lead to a decrease in electrolysis efficiency. In the liquid cathode electrolysis process, stirring the liquid metal and the interface between the molten salt and the liquid metal simultaneously can effectively improve the mass transfer efficiency of the rare metals and alloys in the liquid cathode, thereby improving the electrolysis efficiency.

[0004] At present, the crucible and electrode positions of the molten salt electrolysis device in industrial production are fixed, and workers are usually required to stir the molten salt or add mechanical devices on the top of the electrolytic cell to achieve stirring operation during the molten salt electrolysis process. This has high labor intensity, dangerous operating environment, complex external devices, tight space on the top of the electrolytic cell, accelerated molten salt volatilization loss during stirring, increased production costs and energy consumption, and affected the normal operation of the electrodes, which is not conducive to large-scale production. Summary of the invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present invention is to provide a molten salt electrolysis device that can realize the automatic mechanical stirring function, greatly reduce the labor intensity, avoid operators operating in a dangerous environment, not only has a simple structure and is easy to operate, but also has high electrolysis efficiency and high metal recovery rate.

[0006] A molten salt electrolysis device according to an embodiment of the present invention includes:

[0007] A heating furnace, the heating furnace comprising a bottom wall and a side wall extending upward from a peripheral portion of the bottom wall, the bottom wall and the side wall defining a furnace cavity, and the bottom wall being provided with a through hole;

[0008] A connecting shaft, the connecting shaft vertically passes through the through hole and can rotate horizontally, the upper end of the connecting shaft is located in the furnace cavity, and the lower end of the connecting shaft is located below the bottom wall;

[0009] A crucible is arranged in the furnace cavity, the crucible is not in contact with the heating furnace, the crucible is detachably fixed to the upper end of the connecting shaft, and the crucible has an upper opening;

[0010] A stirring baffle, the stirring baffle passes through the upper opening of the crucible, the lower end of the stirring baffle is located in the crucible, and the upper end of the stirring baffle is fixed to the top of the side wall of the heating furnace;

[0011] The electrode is suspended in the crucible, and there is no contact between the electrode and the crucible or between the electrode and the stirring baffle;

[0012] The driving assembly is connected to the lower end of the connecting shaft to drive the connecting shaft and the crucible to rotate horizontally synchronously.

[0013] According to the molten salt electrolysis device of the embodiment of the present invention, the working process is: pouring the molten salt electrolyte to be electrolyzed into the crucible, turning on the heating furnace so that the molten salt electrolyte always remains in a liquid state, starting the driving assembly, so that the crucible and the connecting shaft rotate horizontally synchronously, and the horizontal rotation of the crucible drives the molten salt electrolyte in the crucible to rotate, and the molten salt electrolyte and the stirring baffle fixed on the heating furnace move relative to each other so as to become uniform, and the energized electrode electrolyzes the molten salt electrolyte in the crucible, thereby, during the electrolysis process, the horizontal rotation of the crucible and the stirring baffle work together to stir the precipitated rare metals or alloys; since the crucible is detachably fixed on the connecting shaft, after the electrolysis of the molten salt electrolyte in the crucible is completed, the heating furnace, the electrode and the driving assembly can be turned off, the crucible is taken out, the molten salt electrolyte is replaced, and then the next round of electrolysis is carried out.

[0014] According to the molten salt electrolysis device of the embodiment of the present invention, the heating furnace heats the molten salt electrolyte so that it is always in a liquid state, which is convenient for the electrolysis process; the driving component drives the connecting shaft and the crucible to rotate horizontally, the stirring baffle placed in the crucible is fixed, and the crucible and the stirring baffle move relative to each other, thereby, the molten salt electrolyte can be stirred evenly under the joint action of the stirring baffle and the crucible, effectively improving the mass transfer efficiency of rare metals and alloys in the liquid cathode, thereby improving the electrolysis efficiency, avoiding the untimely diffusion of the precipitated rare metals and alloys, and forming a coating layer on the liquid cathode, which has an adverse effect on the electrolysis; the crucible is detachably fixed on the connecting shaft, and the feeding and discharging operations are convenient. In summary, the molten salt electrolysis device of the embodiment of the present invention can realize the automatic mechanical stirring function, greatly reduce the labor intensity of manual labor, avoid the operation of operators in dangerous environments, not only has a simple structure and is easy to operate, but also has high electrolysis efficiency and high metal recovery rate.

[0015] According to an embodiment of the present invention, the outer peripheral surface of the connecting shaft is not in contact with the inner peripheral wall of the through hole.

[0016] According to one embodiment of the present invention, it also includes a turntable, which is horizontally arranged in the furnace cavity, has no contact with the heating furnace, has a lower surface fixed to the upper end of the connecting shaft, and has a bottom of the crucible detachably fixed to the upper surface of the turntable.

[0017] According to a further embodiment of the present invention, a positioning groove or a positioning cavity is formed on the upper surface of the turntable, and the bottom of the crucible is provided with a positioning block adapted to the positioning groove or the positioning cavity, and the bottom of the crucible and the turntable are detachably fixed in such a way that the positioning block fits in the positioning groove or the positioning cavity.

[0018] According to one embodiment of the present invention, the stirring baffle includes an upper horizontal plate and a vertical plate, one end of the upper horizontal plate is fixed to the top of the side wall of the heating furnace, the other end of the upper horizontal plate is fixed to the upper end of the vertical plate, the vertical plate passes through the upper opening of the crucible, and the lower end of the vertical plate is close to the bottom of the crucible.

[0019] According to a further embodiment of the invention, the riser is close to the inner side wall of the crucible.

[0020] According to a further embodiment of the present invention, the stirring baffle also includes a lower horizontal plate, which is located on the inner side of the vertical plate and close to the bottom of the crucible, one end of the lower horizontal plate is fixed to the lower end of the vertical plate, and the other end of the lower horizontal plate is a free end.

[0021] According to yet a further embodiment of the present invention, there are one or more stirring baffles.

[0022] According to one embodiment of the present invention, the driving assembly includes a reduction box and a motor, the reduction box having an input end and an output end, the input end of the reduction box is connected to the motor, and the output end of the reduction box is connected to the lower end of the connecting shaft.

[0023] According to some embodiments of the present invention, a conductive ring is further included, which is sleeved on the outer circumferential surface of the connecting shaft and is located below the bottom wall of the heating furnace. The connecting shaft and the crucible are both conductors. The connecting shaft and the conductive ring are electrically connected as well as the connecting shaft and the crucible. The upper ends of the conductive ring and the electrode are electrically connected to the positive and negative electrodes of the first power supply through wires, respectively.

[0024] According to some embodiments of the present invention, the electrodes include a positive electrode and a negative electrode, the positive electrode and the negative electrode are arranged spaced apart, the lower end of the positive electrode and the lower end of the negative electrode are close to the bottom of the crucible, and the upper end of the positive electrode and the upper end of the negative electrode are electrically connected to the positive electrode and the negative electrode of the second power supply through wires, respectively.

[0025] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0027] Figure 1 It is a schematic structural diagram of a molten salt electrolysis device according to an embodiment of the present invention.

[0028] Figure 2 This is a schematic structural diagram of a molten salt electrolysis device according to another embodiment of the present invention.

[0029] Figure 3 for Figure 1 and Figure 2 Schematic diagram of the top view of the turntable.

[0030] Figure 4 for Figure 1 and Figure 2 Schematic side view of the turntable.

[0031] Figure 5 for Figure 1 and Figure 2 Schematic side view of the crucible.

[0032] Reference numerals:

[0033] Molten salt electrolysis device 1000

[0034] Heating furnace 1

[0035] Bottom wall 101 Side wall 102 Furnace cavity 103 Through hole 104

[0036] Connecting shaft 2

[0037] Stirring baffle 3

[0038] Upper horizontal plate 301 Vertical plate 302 Lower horizontal plate 303

[0039] Turntable 4

[0040] Positioning groove 401

[0041] Crucible 5

[0042] Positioning block 501

[0043] Drive assembly 6

[0044] Gearbox 601 Motor 602

[0045] First power source 7 Second power source 8 Conductive ring 9

[0046] Electrode 10

[0047] Positive electrode 1001 Negative electrode 1002

[0048] Conductor 11 Molten salt electrolyte 12 DETAILED DESCRIPTION

[0049] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0050] Combine the following Figures 1 to 5 The molten salt electrolysis device 1000 according to an embodiment of the present invention is described.

[0051] like Figures 1 to 5 As shown, the molten salt electrolysis device 1000 according to the embodiment of the present invention includes a heating furnace 1, a connecting shaft 2, a crucible 5, a stirring baffle 3, an electrode 10 and a driving assembly 6. The heating furnace 1 includes a bottom wall 101 and a side wall 102 extending upward from the peripheral portion of the bottom wall 101. The bottom wall 101 and the side wall 102 define a furnace cavity 103. The bottom wall 101 is provided with a through hole 104. The connecting shaft 2 vertically passes through the through hole 104 and can rotate horizontally. The upper end of the connecting shaft 2 is located in the furnace cavity 103, and the lower end of the connecting shaft 2 is located below the bottom wall 101. The crucible 5 is provided with a stirring baffle 3. Placed in the furnace chamber 103, the crucible 5 is not in contact with the heating furnace 1, the crucible 5 is detachably fixed to the upper end of the connecting shaft 2, and the crucible 5 has an upper opening; the stirring baffle 3 passes through the upper opening of the crucible 5, the lower end of the stirring baffle 3 is located in the crucible 5, and the upper end of the stirring baffle 3 is fixed to the top of the side wall 102 of the heating furnace 1; the electrode 10 is suspended in the crucible 5, and there is no contact between the electrode 10 and the crucible 5, and between the electrode 10 and the stirring baffle 3; the driving component 6 is connected to the lower end of the connecting shaft 2 to drive the connecting shaft 2 and the crucible 5 to rotate horizontally synchronously.

[0052] Specifically, the heating furnace 1 includes a bottom wall 101 and a side wall 102 extending upward from the peripheral portion of the bottom wall 101, the bottom wall 101 and the side wall 102 define a furnace chamber 103, and the bottom wall 101 is provided with a through hole 104. It can be understood that the crucible 5 can be placed in the furnace chamber 103 of the heating furnace 1, and the molten salt electrolyte 12 in the crucible 5 can be heated by the heating furnace 1 to avoid the deposition of the molten salt electrolyte 12 due to the low temperature. The molten salt electrolyte 12 is always in a liquid state, which is convenient for the electrolysis process, has a good electrolysis effect, and a high metal recovery rate.

[0053] The connecting shaft 2 vertically passes through the through hole 104 and can rotate horizontally, the upper end of the connecting shaft 2 is located in the furnace chamber 103, and the lower end of the connecting shaft 2 is located below the bottom wall 101. Specifically, the connecting shaft 2 vertically passes through the through hole 104 of the bottom wall 101 of the heating furnace 1, and the upper end of the connecting shaft 2 is fixedly connected to the bottom of the crucible 5 containing the molten salt electrolyte 12 in the furnace chamber 103, so that the crucible 5 is supported and fixed in the furnace chamber 103; the connecting shaft 2 rotates horizontally, which can drive the crucible 5 fixed on the connecting shaft 2 to rotate horizontally.

[0054] The crucible 5 is arranged in the furnace chamber 103, and there is no contact between the crucible 5 and the heating furnace 1, thereby avoiding friction between the crucible 5 and the heating furnace 1, affecting the rotation of the crucible 5 and reducing the electrolysis efficiency; the crucible 5 is detachably fixed to the upper end of the connecting shaft 2, so that the crucible 5 can be taken out of or put into the furnace chamber 103 of the heating furnace 1; the crucible 5 has an upper opening, so that the molten salt electrolyte 12 in the crucible 5 can be replaced in time after the electrolysis is completed.

[0055] The stirring baffle 3 passes through the upper opening of the crucible 5, the lower end of the stirring baffle 3 is located in the crucible 5, and the upper end of the stirring baffle 3 is fixed to the top of the side wall 102 of the heating furnace 1. Specifically, the stirring baffle 3 is fixed and the lower end is located in the crucible 5. Therefore, when the crucible 5 rotates in the horizontal direction, the stirring baffle 3 and the crucible 5 move relative to each other, so as to achieve the stirring operation of the precipitated rare metals and alloys during the electrolysis process, effectively improve the mass transfer efficiency of the rare metals and alloys in the liquid cathode, thereby improving the electrolysis efficiency, avoiding the untimely diffusion of the precipitated rare metals and alloys, forming a coating layer on the liquid cathode, and having an adverse effect on the electrolysis, resulting in a decrease in the electrolysis efficiency and a low metal recovery rate. At the same time, the upper opening of the crucible 5 plus the stirring baffle 3 has a simple structure, and the upper space of the crucible 5 is reasonably arranged.

[0056] The electrode 10 is suspended in the crucible 5 and extends into the molten electrolyte in the crucible 5, so that the molten salt electrolyte 12 can be electrolyzed to precipitate rare metals; there is no contact between the electrode 10 and the crucible 5, and between the electrode 10 and the stirring baffle 3, so as to avoid friction between the electrode 10 and the crucible 5, which affects the rotation of the crucible 5 and reduces the electrolysis efficiency, and at the same time avoids contact between the electrode 10 and the stirring baffle 3 to affect the electrolysis efficiency of the electrode 10.

[0057] The driving assembly 6 is connected to the lower end of the connecting shaft 2 to drive the connecting shaft 2 and the crucible 5 to rotate horizontally synchronously. It can be understood that the driving assembly 6 provides power for the rotation of the crucible 5, so that the crucible 5 can rotate relative to the fixed electrode 10 and the stirring baffle 3, realizing automatic stirring operation, greatly reducing the labor intensity of manual labor, and avoiding operators from operating in a dangerous environment.

[0058] According to the molten salt electrolysis device 1000 of the embodiment of the present invention, the working process is as follows: pouring the molten salt electrolyte 12 to be electrolyzed into the crucible 5, turning on the heating furnace 1 so that the molten salt electrolyte 12 is always kept in a liquid state, starting the driving assembly 6, so that the crucible 5 and the connecting shaft 2 rotate horizontally synchronously, and the horizontal rotation of the crucible 5 drives the molten salt electrolyte 12 in the crucible 5 to rotate, and the molten salt electrolyte 12 and the stirring baffle 3 fixed on the heating furnace 1 move relative to each other so as to become uniform, and the energized electrode 10 electrolyzes the molten salt electrolyte 12 in the crucible 5, thereby, during the electrolysis process, the horizontal rotation of the crucible 5 and the stirring baffle 3 can be used to stir the precipitated rare metals or alloys; since the crucible 5 is detachably fixed on the connecting shaft 2, after the electrolysis of the molten salt electrolyte 12 in the crucible 5 is completed, the heating furnace 1, the electrode 10 and the driving assembly 6 can be turned off, the crucible 5 is taken out, the molten salt electrolyte 12 is replaced, and then the next round of electrolysis is carried out.

[0059] According to the molten salt electrolysis device 1000 of the embodiment of the present invention, the heating furnace 1 heats the molten salt electrolyte 12 so that it is always in a liquid state, which is convenient for the electrolysis process; the driving component 6 drives the connecting shaft 2 and the crucible 5 to rotate horizontally, and the stirring baffle 3 placed in the crucible 5 is fixed in position, and the crucible 5 and the stirring baffle 3 move relative to each other, thereby, under the joint action of the stirring baffle 3 and the crucible 5, the molten salt electrolyte 12 can be stirred evenly, effectively improving the mass transfer efficiency of rare metals and alloys in the liquid cathode, thereby improving the electrolysis efficiency, avoiding the rare metals and alloys that are precipitated from diffusing untimely, forming a coating layer on the liquid cathode, and having an adverse effect on the electrolysis; the crucible 5 is detachably fixed on the connecting shaft 2, and the feeding and discharging operations are convenient. In summary, the molten salt electrolysis device 1000 of the embodiment of the present invention can realize the automatic mechanical stirring function, greatly reduce the labor intensity of manual labor, avoid the operation of operators in dangerous environments, not only has a simple structure and is easy to operate, but also has high electrolysis efficiency and high metal recovery rate.

[0060] According to one embodiment of the present invention, the outer circumferential surface of the connecting shaft 2 does not contact the inner circumferential wall of the through hole 104, thereby avoiding friction between the connecting shaft 2 and the inner circumferential wall of the through hole 104 to affect the horizontal rotation of the connecting shaft 2 and the crucible 5.

[0061] According to one embodiment of the present invention, a turntable 4 is further included, which is horizontally arranged in the furnace chamber 103, the turntable 4 does not contact the heating furnace 1, the lower surface of the turntable 4 is fixed to the upper end of the connecting shaft 2, and the bottom of the crucible 5 is detachably fixed to the upper surface of the turntable 4. It can be understood that the upper and lower surfaces of the turntable 4 are respectively fixed to the bottom of the crucible 5 and the upper end of the connecting shaft 2, thereby, the contact surface between the crucible 5 and the turntable 4 is large, and the crucible 5 is stably and conveniently placed and rotates smoothly.

[0062] According to a further embodiment of the present invention, a positioning groove 401 or a positioning cavity (not shown in the figure) is formed on the upper surface of the turntable 4, and a positioning block 501 adapted to the positioning groove 401 or the positioning cavity is provided at the bottom of the crucible 5, and the bottom of the crucible 5 and the turntable 4 are detachably fixed in such a way that the positioning block 501 fits in the positioning groove 401 or the positioning cavity. It can be understood that the positioning groove 401 or the positioning cavity on the upper surface of the turntable 4 and the positioning block 501 at the bottom of the crucible 5 cooperate with each other, and the assembly is simple. When placing the crucible 5, the crucible 5 can be quickly and accurately engaged with the turntable 4, and when the turntable 4 and the crucible 5 rotate horizontally, the crucible 5 can be clamped on the turntable 4, so that the crucible 5 rotates smoothly and the crucible 5 can be prevented from shifting.

[0063] According to one embodiment of the present invention, the stirring baffle 3 includes an upper horizontal plate 301 and a vertical plate 302, one end of the upper horizontal plate 301 is fixed to the top of the side wall 102 of the heating furnace 1, and the other end of the upper horizontal plate 301 is fixed to the upper end of the vertical plate 302, the vertical plate 302 passes through the upper opening of the crucible 5, and the lower end of the vertical plate 302 is close to the bottom of the crucible 5. It can be understood that the stirring baffle 3 is fixed by the upper horizontal plate 301, and when the crucible 5 rotates horizontally, the vertical plate 302 of the stirring baffle 3 stirs the molten salt electrolyte 12, and the lower end of the vertical plate 302 is close to the bottom of the crucible 5, which can stir the molten salt electrolyte 12 at the bottom of the crucible 5, so that the molten salt electrolyte 12 in the crucible 5 is stirred evenly, effectively improving the mass transfer efficiency of rare metals and alloys in the liquid cathode, thereby improving the electrolysis efficiency.

[0064] It should be noted that the stirring baffle 3 is made of a non-conductive material, and the stirring baffle 3 can be ceramic.

[0065] According to a further embodiment of the present invention, the vertical plate 302 is close to the inner wall 102 of the crucible 5 , so that the electrode 10 has a larger space and can be conveniently suspended on the upper part of the crucible 5 , and the vertical plate 302 will not have an adverse effect on the normal operation of the electrode 10 .

[0066] According to a further embodiment of the present invention, the stirring baffle 3 also includes a lower horizontal plate 303, which is located on the inner side of the vertical plate 302 and close to the bottom of the crucible 5, one end of the lower horizontal plate 303 is fixed to the lower end of the vertical plate 302, and the other end of the lower horizontal plate 303 is a free end. Thus, the lower horizontal plate 303 of the stirring baffle 3 can stir the molten salt electrolyte 12 at the bottom center of the crucible 5, so that the molten salt electrolyte 12 in the crucible 5 is stirred more evenly, which can effectively improve the mass transfer efficiency of rare metals and alloys in the liquid cathode, thereby improving the electrolysis efficiency.

[0067] According to a further embodiment of the present invention, there are one or more stirring baffles 3. Specifically, the number of stirring baffles 3 is determined according to actual conditions.

[0068] According to one embodiment of the present invention, the driving assembly 6 includes a reduction box 601 and a motor 602, the reduction box 601 having an input end and an output end, the input end of the reduction box 601 is connected to the motor 602, and the output end of the reduction box 601 is connected to the lower end of the connecting shaft 2. It can be understood that the motor 602, the reduction box 601 and the connecting shaft 2 are connected in sequence, whereby the motor 602 and the reduction box 601 can control the rotation speed and rotation direction of the connecting shaft 2, so that the rotation speed and rotation direction of the crucible 5 can be changed accordingly.

[0069] According to some embodiments of the present invention, a conductive ring 9 is further included, which is sleeved on the outer peripheral surface of the connecting shaft 2 and is located below the bottom wall 101 of the heating furnace 1. The connecting shaft 2 and the crucible 5 are both conductors. The connecting shaft 2 and the conductive ring 9 are electrically connected as well as the connecting shaft 2 and the crucible 5. The upper ends of the conductive ring 9 and the electrode 10 are electrically connected to the positive and negative electrodes of the first power supply 7 through the wires 11, respectively. It can be understood that the conductive ring 9 is connected to the positive or negative electrode of the first power supply 7 through the wire 11, and the conductive ring 9 is sleeved on the outer peripheral surface of the connecting shaft 2 to avoid friction between the connecting shaft 2 and the conductive ring 9 during rotation, so that the conductive ring 9 and the wire 11 are entangled, the connecting shaft 2 is fixedly connected to the crucible 5 and the connecting shaft 2 and the crucible 5 are both conductive, so that the crucible 5 can be used as the positive or negative electrode for electrolysis of the molten salt electrolyte 12; the electrode 10 is connected to the negative or positive electrode of the first power supply 7 through the wire 11, so that the electrode 10 can be used as the negative or positive electrode for electrolysis of the molten salt electrolyte 12; the driving component 6 drives the connecting shaft 2 to rotate horizontally, and the crucible 5 rotates accordingly, and the stirring baffle 3 stirs the molten salt electrolyte 12, and the electrode 10 and the crucible 5 respectively serve as the positive and negative electrodes of the electrolysis reaction, and the molten salt electrolyte 12 is electrolyzed, thereby precipitating rare metals.

[0070] It should be noted that the electrode 10 can be connected to the positive electrode or the negative electrode of the first power source 7 , and the conductive ring 9 can be connected to the negative electrode or the positive electrode of the first power source 7 .

[0071] According to some embodiments of the present invention, the electrode 10 includes a positive electrode 1001 and a negative electrode 1002, the positive electrode 1001 and the negative electrode 1002 are arranged spaced apart, the lower end of the positive electrode 1001 and the lower end of the negative electrode 1002 are close to the bottom of the crucible 5, and the upper end of the positive electrode 1001 and the upper end of the negative electrode 1002 are electrically connected to the positive electrode and the negative electrode of the second power supply 8 through the wire 11, respectively. It can be understood that the positive electrode 1001 and the negative electrode 1002 are both suspended above the crucible 5 and are electrically connected to the positive and negative electrodes of the second power supply 8 through the wire 11 respectively. The driving component 6 drives the connecting shaft 2 to rotate horizontally, and the crucible 5 rotates accordingly. The stirring baffle 3 stirs the molten salt electrolyte 12, and the positive electrode 1001 and the negative electrode 1002 electrolyze the molten salt electrolyte 12, thereby precipitating rare metals. The lower end of the positive electrode 1001 and the lower end of the negative electrode 1002 are close to the bottom of the crucible 5, so that the molten salt electrolyte 12 is electrolyzed more completely and the metal recovery rate is high.

[0072] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0073] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A molten salt electrolysis device, characterized in that: include: A heating furnace, the heating furnace comprising a bottom wall and a side wall extending upward from a peripheral portion of the bottom wall, the bottom wall and the side wall defining a furnace cavity, and the bottom wall being provided with a through hole; A connecting shaft, the connecting shaft vertically passes through the through hole and can rotate horizontally, the upper end of the connecting shaft is located in the furnace cavity, and the lower end of the connecting shaft is located below the bottom wall; A crucible, wherein the crucible is arranged in the furnace chamber, the crucible is not in contact with the heating furnace, the crucible is detachably fixed to the upper end of the connecting shaft, and the crucible has an upper opening; a stirring baffle, the stirring baffle passing through the upper opening of the crucible, the lower end of the stirring baffle being located in the crucible, and the upper end of the stirring baffle being fixed to the top end of the side wall of the heating furnace; An electrode, wherein the electrode is suspended in the crucible, and the electrode is not in contact with the crucible or with the stirring baffle; A driving assembly connected to the lower end of the connecting shaft to drive the connecting shaft and the crucible to rotate horizontally synchronously; The stirring baffle comprises an upper horizontal plate and a vertical plate, one end of the upper horizontal plate is fixed to the top of the side wall of the heating furnace, the other end of the upper horizontal plate is fixed to the upper end of the vertical plate, the vertical plate passes through the upper opening of the crucible, and the lower end of the vertical plate is close to the bottom of the crucible; The vertical plate is close to the inner wall of the crucible; The stirring baffle further comprises a lower horizontal plate, which is located on the inner side of the vertical plate and close to the bottom of the crucible, one end of the lower horizontal plate is fixed to the lower end of the vertical plate, and the other end of the lower horizontal plate is a free end; It also includes a turntable, which is horizontally arranged in the furnace cavity. The turntable is not in contact with the heating furnace. The lower surface of the turntable is fixed to the upper end of the connecting shaft, and the bottom of the crucible is detachably fixed to the upper surface of the turntable.

2. The molten salt electrolysis device according to claim 1, characterized in that: The outer peripheral surface of the connecting shaft does not contact the inner peripheral wall of the through hole.

3. The molten salt electrolysis device according to claim 1, characterized in that: A positioning groove or a positioning cavity is formed on the upper surface of the turntable, and a positioning block adapted to the positioning groove or the positioning cavity is provided at the bottom of the crucible. The bottom of the crucible and the turntable are detachably fixed in such a way that the positioning block fits in the positioning groove or the positioning cavity.

4. The molten salt electrolysis device according to claim 1, characterized in that: The stirring baffle has one or more.

5. The molten salt electrolysis device according to claim 1, characterized in that: The driving assembly includes a reduction box and a motor. The reduction box has an input end and an output end. The input end of the reduction box is connected to the motor, and the output end of the reduction box is connected to the lower end of the connecting shaft.

6. The molten salt electrolysis device according to any one of claims 1 to 5, characterized in that: It also includes a conductive ring, which is sleeved on the outer circumferential surface of the connecting shaft and is located below the bottom wall of the heating furnace. The connecting shaft and the crucible are both conductors. The connecting shaft and the conductive ring are electrically connected as well as the connecting shaft and the crucible. The conductive ring and the upper end of the electrode are electrically connected to the positive and negative electrodes of the first power supply through wires.

7. The molten salt electrolysis device according to any one of claims 1 to 5, characterized in that: The electrodes include a positive electrode and a negative electrode, the positive electrode and the negative electrode are arranged spaced apart, the lower end of the positive electrode and the lower end of the negative electrode are close to the bottom of the crucible, and the upper end of the positive electrode and the upper end of the negative electrode are electrically connected to the positive electrode and the negative electrode of the second power supply through wires, respectively.

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