Anode device suitable for molten salt electrolysis and molten salt electrolysis device

Abstract

The utility model discloses a molten salt electrolysis device and an anode device suitable for molten salt electrolysis, and the anode device suitable for molten salt electrolysis comprises a conductive assembly and a plurality of graphite rods. The conductive assembly comprises a connecting piece and a diversion piece, one end of the connecting piece is connected with the power supply, and the other end of the connecting piece is connected with the diversion piece. The plurality of graphite rods are arranged in a linear shape, a ring shape or an arc shape, the plurality of graphite rods are arranged on the flow guide part, and the shape of the flow guide part is consistent with the arrangement shape of the plurality of graphite rods. According to the anode device suitable for molten salt electrolysis, the conductive assembly is combined with the multiple graphite rods, so that the multiple graphite rods can be arranged in a linear or annular or arc shape, and compared with the mode that a single graphite rod serves as an anode, the area of the anode device suitable for molten salt electrolysis is increased; the covering area of an electric field between the anode and the cathode is increased, and the electric field can act on electrolyte in a larger range, so that the efficiency of molten salt electrolysis of titanium metal is improved, and the economical efficiency of a molten salt electrolysis process is improved.

Description

Technical Field

[0001] The present application relates to the technical field of molten salt electrolysis, and particularly relates to an anode device suitable for molten salt electrolysis and a molten salt electrolysis device. Background Art

[0002] Titanium is a silver-white transition metal, which has the advantages of high melting point, high specific strength, good biocompatibility and strong corrosion resistance, and is widely used in the fields of aerospace, national defense, medical biology and petrochemical industry. China is rich in titanium resources, ranking first in the world in reserves, but the production capacity of sponge titanium is weak, far from meeting the needs of the country's economic development.

[0003] The molten salt electrolysis process is a research hotspot in various countries in the world. Especially for the molten salt electrolysis of titanium metal, it is expected to replace the current Kroll method for preparing titanium metal in the future. The Kroll method has problems such as complex process, long production cycle and inability to produce continuously. The molten salt electrolysis of titanium metal is a method of using chlorides of alkali metals or alkaline earth metals as electrolytes, applying an external power supply for electrolysis at a temperature higher than the melting point of the chloride to obtain metallic titanium.

[0004] In the prior art, carbon rods are used as anodes for the molten salt electrolysis of titanium metal. The coverage area of the electric field between the anode and the cathode is small, resulting in low efficiency in the molten salt electrolysis of titanium metal.

[0005] Therefore, how to improve the efficiency of the molten salt electrolysis of titanium metal has become a technical problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0006] The present application provides an anode device suitable for molten salt electrolysis to improve the efficiency of the molten salt electrolysis of titanium metal. The present application also provides a molten salt electrolysis device.

[0007] To achieve the above object, the present application provides an anode device suitable for molten salt electrolysis, including a conductive component and a plurality of graphite rods.

[0008] The plurality of graphite rods are arranged in a straight line, a ring or an arc.

[0009] The conductive component includes a connecting piece and a guiding piece. One end of the connecting piece is connected to a power supply, the other end of the connecting piece is connected to the guiding piece, the shape of the guiding piece is the same as the arrangement shape of the graphite rods, and the graphite rods are installed on the guiding piece.

[0010] Preferably, in the above anode device suitable for molten salt electrolysis, installation grooves or installation holes are formed on the guiding piece, and the graphite rods are connected to the guiding piece through the installation grooves or the installation holes.

[0011] Preferably, in the anode device applicable to molten salt electrolysis described above, the graphite rod is bolted to the current collector.

[0012] Preferably, in the anode device applicable to molten salt electrolysis described above, the connectors are symmetrically arranged on the current collector.

[0013] Preferably, in the anode device applicable to molten salt electrolysis described above, the connector is fixedly connected to the current collector, or the connector is detachably connected to the current collector.

[0014] Preferably, in the anode device applicable to molten salt electrolysis described above, the connector and the current collector are metal parts.

[0015] Preferably, in the anode device applicable to molten salt electrolysis described above, the graphite rod is cylindrical, prismatic or sheet-shaped.

[0016] Preferably, in the anode device applicable to molten salt electrolysis described above, the shapes of two adjacent graphite rods are the same or different; or,

[0017] the sizes of two adjacent graphite rods are equal or unequal.

[0018] Preferably, in the anode device applicable to molten salt electrolysis described above, the graphite rods are arranged uniformly or non-uniformly on the current collector.

[0019] A molten salt electrolysis device includes an anode device, and the anode device is the anode device described in any of the above solutions.

[0020] The anode device applicable to molten salt electrolysis provided by the embodiment of the present application includes a conductive component and a plurality of graphite rods. The conductive component includes a connector and a current collector. One end of the connector is connected to a power source, and the other end of the connector is connected to the current collector. The plurality of graphite rods are arranged in a straight line, a ring or an arc shape, and the plurality of graphite rods are installed on the current collector. The shape of the current collector is consistent with the arrangement shape of the plurality of graphite rods. The anode device applicable to molten salt electrolysis disclosed in the present application combines the conductive component with the plurality of graphite rods, so that the plurality of graphite rods can be arranged in a straight line, a ring or an arc shape. Compared with the method of using a single graphite rod as the anode, the area of the anode device applicable to molten salt electrolysis is increased, the coverage area of the electric field between the anode and the cathode is increased, and the electric field can act on a larger range of electrolytes to improve the efficiency of molten salt electrolysis of titanium metal and improve the economy of the molten salt electrolysis process.

[0021] The present application also discloses a molten salt electrolysis device, including an anode device, and the anode device is the anode device described in any of the above solutions. Since the anode device has the above technical effects, the molten salt electrolysis device having the anode device also has the same technical effects, which will not be elaborated here. Description of the Drawings

[0022] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some examples or embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained according to the provided drawings, and the present application can also be applied to other similar scenarios according to the provided drawings. Unless obvious from the language context or otherwise stated, the same reference numerals in the drawings represent the same structure or operation.

[0023] Figure 1 It is a schematic structural diagram of the anode device applicable to molten salt electrolysis of the present application.

[0024] The accompanying drawings are described as follows:

[0025] 1 - Conductive component; 11 - Connecting piece; 12 - Current guiding piece; 2 - Graphite rod. Detailed implementation manners

[0026] The following will further elaborate on the present application in combination with the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the relevant application, rather than limiting the application. The described embodiments are only part of the embodiments of the present application, not all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts belong to the scope of protection of the present application.

[0027] It should be noted that for the sake of convenience of description, only the parts related to the relevant application are shown in the accompanying drawings. Without conflict, the embodiments in the present application and the features in the embodiments can be arbitrarily combined with each other, as long as the combined technical features are not mutually contradictory. All feasible feature combinations are the technical contents clearly recorded herein. Any sub - feature among the multiple sub - features included in the same statement can be independently applied without necessarily being applied together with other sub - features.

[0028] As shown in the present application and the claims, unless the context clearly indicates an exceptional situation, words such as "a", "an", "one" and / or "the" are not specifically singular, but may also include plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of the clearly identified steps and elements, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements. An element defined by the statement "including one..." does not exclude the existence of another identical element in the process, method, commodity or device including the element.

[0029] Among them, in the description of the embodiments of the present application, unless otherwise specified, " / " means "or". For example, A / B may mean A or B. The "and / or" herein is merely an association relationship describing associated objects, indicating that there can be three relationships. For example, A and / or B may mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of the present application, "a plurality of" means two or more than two.

[0030] Please refer to Figure 1 。

[0031] Some embodiments of the present application disclose an anode device suitable for molten salt electrolysis, including a conductive component 1 and a plurality of graphite rods 2.

[0032] The conductive component 1 includes a connecting piece 11 and a current guiding piece 12. One end of the connecting piece 11 is connected to a power source, and the other end of the connecting piece 11 is connected to the current guiding piece 12.

[0033] The plurality of graphite rods 2 are arranged in a straight line, a ring, or an arc. The plurality of graphite rods 2 are installed on the current guiding piece 12, and the shape of the current guiding piece 12 is the same as the arrangement shape of the plurality of graphite rods 2. Specifically, when the plurality of graphite rods 2 are arranged in a straight line, the current guiding piece 12 is a flat plate type; when the plurality of graphite rods 2 are arranged in a ring, the current guiding piece 12 is a ring; when the plurality of graphite rods 2 are arranged in an arc, the current guiding piece 12 is an arc.

[0034] In the anode device suitable for molten salt electrolysis disclosed in the present application, by combining the conductive component with the plurality of graphite rods 2, the plurality of graphite rods 2 can be arranged in a straight line, a ring, or an arc. Compared with the method of using a single graphite rod 2 as the anode, the area of the anode device suitable for molten salt electrolysis is increased, the coverage area of the electric field between the anode and the cathode is increased, and the electric field can act on a larger range of electrolytes to improve the efficiency of molten salt electrolysis of titanium metal and improve the economy of the molten salt electrolysis process.

[0035] In the embodiment where the plurality of graphite rods 2 are arranged in a straight line, the plurality of graphite rods 2 can be arranged in only one row or two rows. The setting direction of two adjacent rows of graphite rods 2 is perpendicular to the plane where the single row of graphite rods 2 is located, and two adjacent rows of graphite rods 2 are arranged in a position corresponding or staggered manner in the plane direction of the single row of graphite rods 2. In the embodiment where two adjacent rows of graphite rods 2 are arranged in a position corresponding manner, the distance between two adjacent graphite rods 2 can be appropriately reduced, and the electric fields between the two rows of graphite rods 2 and the cathode will be superimposed to increase the intensity of the electric field; in the embodiment where two adjacent rows of graphite rods 2 are arranged in a staggered manner, the distance between two adjacent graphite rods 2 can be appropriately increased so that the electric field is evenly distributed on the arrangement plane of the single row of graphite rods 2. In this embodiment, the cathode can be located on either side of the plane where the plurality of graphite rods 2 are located.

[0036] In the embodiment where multiple graphite rods 2 are arranged in a ring shape, in the directions on both sides of the axis, there is an overlap of the electric fields formed between the graphite rods 2 closer to the cathode side and the graphite rods 2 farther from the cathode side and the cathode, which increases the electric field strength. Moreover, each of the multiple graphite rods 2 arranged in a ring shape forms an electric field with the cathode at different positions in the ring. Compared with the arrangement where multiple graphite rods 2 are arranged in a straight line, the coverage area of the electric field is further increased, and the electric field can act on a larger range of electrolytes to improve the efficiency of molten salt electrolysis of titanium metal. In this embodiment, the cathode can be located inside or outside the ring where the multiple graphite rods 2 are located. When the cathode is located inside the ring where the multiple graphite rods 2 are located, the overall structure of the molten salt electrolysis device will be more compact and occupy less space; when the cathode is located outside the ring where the multiple graphite rods 2 are located, the axis of the anode device is parallel to the axis of the cathode, and the overall unfolded area composed of the anode device and the cathode is larger and the efficiency is higher.

[0037] In the embodiment where multiple graphite rods 2 are arranged in an arc shape, the radian of the arc structure formed by the multiple graphite rods 2 is between 60° and 150°, including 60° and 150°. The coverage area of the electric field formed by the multiple graphite rods 2 arranged in an arc shape is larger than the coverage area of the electric field of the multiple graphite rods 2 arranged in a straight line. In this embodiment, the cathode can be located on either side of the arc surface where the multiple graphite rods 2 are located.

[0038] In order to reduce the connection difficulty between the current guide member 12 and the graphite rod 2, in this solution, an installation groove or an installation hole is provided on the current guide member 12, and the graphite rod 2 is connected to the current guide member 12 through the installation groove or the installation hole.

[0039] In the embodiment where multiple graphite rods 2 are arranged in a straight line or an arc shape and an installation groove is provided on the current guide member 12, the installation groove can be provided on either side of the plane or arc surface where the current guide member 12 is located. The graphite rod 2 can be inserted into the installation groove from the notch of the installation groove or from the axial direction of the installation groove.

[0040] In the embodiment where multiple graphite rods 2 are arranged in a ring shape and an installation groove is provided on the current guide member 12, the installation groove can be provided on the inner side or the outer side of the ring. The graphite rod 2 can be inserted into the installation groove from the notch of the installation groove or from the axial direction of the installation groove.

[0041] In the embodiment where multiple graphite rods 2 are arranged in a straight line or an arc shape or a ring shape and an installation hole is provided on the current guide member 12, the installation hole is on the end face perpendicular to the axes of the current guide member 12 and the graphite rod 2, and the graphite rod 2 is inserted into the installation hole.

[0042] In this solution, the graphite rod 2 and the current guide 12 are detachably connected. Specifically, the graphite rod 2 has a low hardness and is easily damaged. The detachable connection between the graphite rod 2 and the current guide 12 can reduce the difficulty of replacing the graphite rod 2 and facilitate the maintenance of the anode device suitable for molten salt electrolysis. At the same time, during transportation or handling, the conductive component 1 and the graphite rod 2 can be transported or handled separately, which not only reduces the handling difficulty, but also reduces the volume of the object being handled. At the same time, the vulnerable graphite rod 2 can be protected separately and specially, reducing the risk of damage to the graphite rod 2.

[0043] In some embodiments of the present application, the graphite rod 2 and the current guide 12 are bolted. Specifically, bolt holes communicating with the installation groove or installation hole are formed on the current guide 12, and installation holes corresponding to the positions of the bolt holes are formed on the graphite rod 2. The bolt rotates in the bolt hole to realize the screw of the bolt into or out of the installation hole, thereby realizing the installation and disassembly of the graphite rod 2 on the current guide 12. This connection method reduces the connection difficulty between the graphite rod 2 and the current guide 12 and facilitates the installation and disassembly of the graphite rod 2.

[0044] In some other embodiments of the present application, the graphite rod 2 and the current guide 12 are threadedly connected, which is suitable for the structural form in which the graphite rod 2 is connected to the current guide 12 through the installation hole. Specifically, an external thread is formed at one end of the graphite rod 2 connected to the current guide 12, and an internal thread is provided on the hole wall of the installation hole of the current guide 12. The graphite rod 2 and the current guide 12 are connected by the cooperation of the external thread and the internal thread.

[0045] The connection between the graphite rod 2 and the current guide 12 can also adopt connection methods such as bonding, pin connection or interference fit, or other methods.

[0046] In order to improve the working stability of the anode device suitable for molten salt electrolysis and make the current guide 12 as parallel to the horizontal plane as possible, preferably, the connecting members 11 are symmetrically arranged on the current guide 12.

[0047] As Figure 1 shown, it is an embodiment in which a plurality of graphite rods 2 are arranged in a ring. The current guide 12 is also in a ring shape, and the number of the connecting members 11 is two and they are respectively located at both ends in the radial direction of the current guide 12.

[0048] In the embodiment in which a plurality of graphite rods 2 are arranged in a straight line, the current guide 12 is also in a straight line shape. The connecting member 11 can be arranged at the center of the current guide 12 or symmetrically arranged on both sides of the center of the current guide 12.

[0049] In the embodiment in which a plurality of graphite rods 2 are arranged in an arc shape, the current guide 12 is also in an arc shape, and the connecting members 11 are symmetrically arranged on both sides of the center of the current guide 12.

[0050] The connection mode between the flow guide member 12 and the connection member 11 can be a fixed connection or a detachable connection.

[0051] In an embodiment where the flow guide member 12 and the connection member 11 are connected in a fixed manner, the flow guide member 12 and the connection member 11 can be integrally formed, welded, or riveted.

[0052] When the flow guide member 12 and the connection member 11 are connected by welding, both the flow guide member 12 and the connection member 11 are made of metal materials.

[0053] The connection member 11 and the flow guide member 12 are made of conductive materials. The connection member 11 and the flow guide member 12 can be made of the same conductive material or different conductive materials.

[0054] Conductive materials include metal conductive materials and non-metal conductive materials.

[0055] When the connection member 11 and the flow guide member 12 are made of the same non-metal conductive material, graphite can be selected.

[0056] When the connection member 11 and the flow guide member 12 are made of the same metal material, copper, iron, etc. can be selected. Preferably, iron with a relatively low cost is selected.

[0057] The conductive component made of iron not only has a higher conductivity than graphite, but also has a relatively lower cost. In addition, due to the certain corrosiveness of the electrolyte, the conductive component made of iron needs to be located above the electrolyte liquid level during operation, and the graphite rod 2 is located below the electrolyte liquid level.

[0058] The sizes of the connection member 11, the flow guide member 12, and the graphite rod 2 are determined according to the amount of electrolytic products and the size of the electrolytic furnace, and no specific limitation is made here.

[0059] The connection member 11 passes through the furnace cover and is connected to the anode of the DC power supply outside the electric furnace. The flow guide member 12 can evenly distribute the anode current in the electrolytic cell, and then evenly apply the electric field to the electrolyte through the graphite rod 2, and perform electrolysis with the cathode under the protection of vacuum or inert gas environment.

[0060] There are various choices for the shape of the graphite rod 2. The graphite rod 2 can be cylindrical, prismatic, sheet-shaped, etc.

[0061] Preferably, the graphite rod 2 is selected to be cylindrical. The surface area of a single graphite rod 2 is large, and thus the surface of the annular structure composed of multiple graphite rods 2 is also large, which is beneficial to increasing the coverage area of the electric field and thus improving the efficiency of molten salt electrolysis of titanium metal.

[0062] The multiple graphite rods 2 can be arranged in a linear, circular or arc shape. The shapes of two adjacent graphite rods 2 can be the same or different, and the shape of the graphite rod 2 is designed according to the electric field requirements between the anode and the cathode.

[0063] As Figure 1 shown, in an embodiment where the multiple graphite rods 2 are arranged in a circular shape, the shapes of two adjacent graphite rods 2 in this embodiment are the same.

[0064] The multiple graphite rods 2 can be arranged in a linear, circular or arc shape. The sizes of two adjacent graphite rods 2 can be equal or unequal, and the size of the graphite rod 2 is designed according to the electric field requirements between the anode and the cathode.

[0065] The multiple graphite rods 2 can be arranged in a linear, circular or arc shape, and the graphite rods 2 are arranged evenly or unevenly on the current guide member 12. Even arrangement means that the distance between two adjacent graphite rods 2 is equal; uneven arrangement means that there are at least two different spacings between two adjacent graphite rods 2 among the multiple graphite rods 2. The spacing between the graphite rods 2 is designed according to the electric field requirements between the anode and the cathode.

[0066] As Figure 1 shown, in an embodiment of the anode device disclosed in the present application, it includes a conductive component 1 and multiple graphite rods 2. The conductive component 1 includes a connecting member 11 and an annular current guide member 12. The connecting member 11 is in a rod shape. One end of the connecting member 11 is connected to a power source, and the other end of the connecting member 11 is connected to the current guide member 12. The number of connecting rods is two and they are respectively located at both ends in the radial direction of the current guide member 12. The multiple graphite rods 2 are arranged along the circumference of the current guide member 12, and the multiple graphite rods 2 are bolted to the current guide member 12. In this embodiment, the connecting member 11 and the current guide member 12 are made of stainless steel material, and the connecting member 11 and the current guide member 12 are connected by welding.

[0067] The present application also discloses a molten salt electrolysis device, including an anode device, and the anode device is the anode device described in any of the above-mentioned solutions.

[0068] Since the anode device has the above technical effects, the molten salt electrolysis device having the anode device also has the same technical effects, which will not be elaborated here.

[0069] The above description is only a preferred embodiment of the present application and an explanation of the applied technical principles, and is not intended to limit the present application. For those skilled in the art, various modifications and variations can be made to the present application. The scope of the application involved in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above application concept. For example, the technical solutions formed by mutually replacing the above features with the technical features (but not limited to) disclosed in the present application that have similar functions.

Claims

1. An anode device suitable for molten salt electrolysis, characterized in that: It comprises a conductive component (1) and a plurality of graphite rods (2). The plurality of graphite rods (2) are arranged in a straight line, an annular shape or an arc shape; The conductive component (1) comprises a connecting piece (11) and a flow guide (12); one end of the connecting piece (11) is connected to a power source, and the other end of the connecting piece (11) is connected to the flow guide (12); the shape of the flow guide (12) is consistent with the arrangement shape of the graphite rods (2); and the graphite rods (2) are mounted on the flow guide (12).

2. The anode device suitable for molten salt electrolysis according to claim 1, characterized in that: The guide member (12) is provided with a mounting groove or a mounting hole, and the graphite rod (2) is connected to the guide member (12) via the mounting groove or the mounting hole.

3. The anode device suitable for molten salt electrolysis according to claim 2, characterized in that: The graphite rod (2) is bolted to the flow guide (12).

4. The anode device suitable for molten salt electrolysis according to claim 1, characterized in that: The connecting member (11) is symmetrically arranged on the flow guide member (12).

5. The anode device suitable for molten salt electrolysis according to claim 1, characterized in that: The connecting member (11) is fixedly connected to the flow guide member (12), or the connecting member (11) is detachably connected to the flow guide member (12).

6. The anode device suitable for molten salt electrolysis according to claim 1, characterized in that: The connecting piece (11) and the flow guide piece (12) are metal pieces.

7. The anode device suitable for molten salt electrolysis according to any one of claims 1 to 6, characterized in that: The graphite rod (2) is cylindrical, prismatic or sheet-shaped.

8. The anode device suitable for molten salt electrolysis according to any one of claims 1 to 6, characterized in that: The shapes of two adjacent graphite rods (2) are the same or different; or, The sizes of two adjacent graphite rods (2) are equal or unequal.

9. The anode device suitable for molten salt electrolysis according to any one of claims 1 to 6, characterized in that: The graphite rods (2) are arranged evenly or unevenly on the flow guide (12).

10. A molten salt electrolysis device, characterized in that: The invention comprises an anode device, wherein the anode device is the anode device according to any one of claims 1 to 9.

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