A metal lithium high temperature steam collection device and a metal lithium reduction tank using the same

Abstract

The present invention discloses a metal lithium high temperature steam collection device and a metal lithium reduction tank used therein. The reduction tank is provided with a metal lithium high temperature steam collection device, and the metal lithium high temperature steam collection device includes a collection tank, the collection tank is fixed on a mounting portion, a collection port is provided at one end of the collection tank away from the mounting portion, a spacer is installed on the mounting portion, a sealed cavity is formed between the spacer and the mounting portion, a sealing member is installed on the mounting portion, the sealing member passes through the mounting portion, the sealing member has a portion extending to the sealed cavity and a portion in the collection tank, and the length of the sealing member extending into the collection tank is adjustable, and the length of the sealing member extending into the collection tank is adjusted to close or open the collection port. In the present invention, gaseous metal lithium can be collected during the metal lithium reduction process, and the metal lithium can be collected without secondary distillation separation, thereby increasing the collection efficiency and ensuring the safety of the metal lithium collection process.

Description

Technical Field

[0001] The present invention relates to the technical field of equipment related to metal lithium preparation, and in particular to a metal lithium high-temperature steam collection device and a metal lithium reduction tank using the same. Background Art

[0002] The previous production of metallic lithium comes from the electrolytic method of metallic lithium. The electrolytic method for preparing metallic lithium requires the reaction of lithium carbonate with hydrochloric acid to produce lithium chloride, then the lithium chloride is dried and then melted and electrolyzed, and then the metallic lithium is cast under the protection of argon. The raw material of lithium chloride for the electrolytic method of producing metallic lithium is very easy to absorb water, and it is difficult to dry and preserve. The byproduct chlorine gas in the electrolytic process is a toxic gas, and a trace amount of gas leakage will cause great pollution to the environment. With the promotion of the concept of green environmental protection, green preparation methods for metallic lithium are emerging in an endless stream, and methods such as carbon thermal reduction of lithium carbonate, thermal reduction of lithium carbonate silicon powder, and aluminum thermal reduction have been born one after another. Regardless of the reduction method used, the collection of metallic lithium must be carried out in a steam state, and the chemical activity of metallic lithium vapor is extremely active, which can react with oxygen, nitrogen, carbon dioxide, etc. to generate impurities. The collection device of metallic lithium is a necessary device for the thermal reduction method of preparing metallic lithium, and it is also a topic that the industry urgently needs to solve.

[0003] The current reduction device cools the reduction slag and the metallic lithium together after the metallic lithium is reduced, and then performs secondary distillation separation. This cannot achieve continuous production and is inefficient. The secondary distillation process results in a low yield of metal products. Summary of the invention

[0004] In order to solve the technical problems existing in the background technology, the present invention proposes a metal lithium high temperature steam collection device and a metal lithium reduction tank using the same.

[0005] A metal lithium high-temperature vapor collection device proposed in the present invention includes a collection tank, which is fixed on a mounting portion, and a collection port is opened at one end of the collection tank away from the mounting portion, and a spacer is installed on the mounting portion to form a sealed cavity between the spacer and the mounting portion, and a sealing member is installed on the mounting portion, the sealing member passes through the mounting portion and has a portion extending to the sealed cavity and a portion inside the collection tank, and the length of the sealing member extending into the collection tank is adjustable, and the length of the sealing member extending into the collection tank is adjusted to close or open the collection port.

[0006] During use, the collecting tank is fixed in a reduction tank for metallic lithium. Similar to the prior art, metallic lithium is reduced in a high-temperature and vacuum reduction tank. During the reduction of metallic lithium, the sealing member is adjusted to move away from the collecting port, thereby increasing the length of the sealing member in the sealing cavity, so that the collecting port is opened. During the vacuum and high-temperature reduction of metallic lithium, the generated metallic lithium gas enters the collecting tank through the collecting port. After the reduction is completed, the sealing member is adjusted to move toward the collecting port and the sealing member seals the collecting port. Then the device is taken out of the reduction tank, and the metallic lithium gas in the collecting tank is liquefied. The liquefied lithium is discharged into the metallic lithium casting mold through the collecting port.

[0007] The collection port can be opened or closed by directly driving the seal to move through an electric telescopic rod or a motor in the prior art. Of course, the electric telescopic rod or the motor is installed in the sealing cavity, but the movement of the electric telescopic rod needs to be controlled by Bluetooth or a network signal.

[0008] As a further optimized solution of the present invention, the part of the seal extending into the sealing cavity is provided with a first magnetic component, and the outside of the spacer is provided with a second magnetic component, the second magnetic component adsorbs the first magnetic component, and the second magnetic component is moved relative to the spacer by external force. Since the second magnetic part adsorbs the first magnetic component and the first magnetic component is fixed to the seal, the length of the seal extending into the collection tank is adjusted.

[0009] Preferably, the seal is mounted on the mounting portion by means of threads, the second magnetic component is sleeved outside the spacer, and the second magnetic component and the first magnetic component can rotate relative to the spacer, and the rotation of the second magnetic component drives the rotation of the first magnetic component to realize the opening or closing of the collection port by the seal.

[0010] Preferably, the second magnetic component is cylindrical.

[0011] Preferably, the sealing member is slidably mounted on the mounting portion, and the second magnetic component is slidably mounted outside the spacer sleeve, and sliding the second magnetic component drives the first magnetic component to move so as to open or close the collecting port by the sealing member.

[0012] Preferably, it also includes a cooling structure, which is arranged on the mounting portion and cools the mounting portion.

[0013] Preferably, the cooling structure includes a liquid cooling chamber opened on the mounting portion, and a liquid inlet pipe and a liquid outlet pipe are provided on the mounting portion, and the liquid inlet pipe and the liquid outlet pipe are both connected to the liquid cooling chamber to separate the high temperature in the collection tank to prevent the high temperature from demagnetizing the first magnetic component or the second magnetic component.

[0014] Preferably, a heating element is wound around the outside of the collection tank to prevent the liquid lithium from solidifying into solid lithium.

[0015] Preferably, the mounting portion is provided with an air inlet pipe and an air outlet pipe, both of which are connected to the collecting tank, and both of which are provided with valves, so as to facilitate the introduction of argon gas into the collecting tank and the evacuation of the collecting tank.

[0016] A metal lithium reduction tank using a metal lithium high-temperature steam collection device comprises a tank body and a flange fixed to the tank body, the metal lithium high-temperature steam collection device is installed on the flange, the collection tank is located outside the tank body, and the installation portion is located outside the tank body.

[0017] In the present invention, a metal lithium high-temperature vapor collection device and a metal lithium reduction tank used therein are proposed, which can collect metal lithium during the metal lithium reduction process, and can achieve the collection of metal lithium without the need for secondary distillation separation, thereby increasing the collection efficiency and ensuring the safety of the metal lithium collection process.

[0018] 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

[0019] Figure 1 This is a schematic structural diagram of a first embodiment of a device for collecting high-temperature lithium metal vapor according to the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of a metal lithium reduction tank using a metal lithium high-temperature vapor collection device of the present invention;

[0021] Figure 3 This is a schematic structural diagram of the lithium metal high temperature steam collecting device of the present invention during the lithium casting process;

[0022] Figure 4 This is a schematic structural diagram of a second embodiment of a device for collecting high-temperature lithium metal vapor according to the present invention.

[0023] In the figure: 1. collecting tank; 2. mounting portion; 20. liquid cooling chamber; 3. collecting port; 4. spacer; 5. sealing member; 6. sealing chamber; 7. first magnetic component; 8. second magnetic component; 9. liquid inlet pipe; 10. liquid outlet pipe; 11. heating member; 12. tank body; 13. flange; 14. argon gas inlet pipe; 15. gas inlet pipe; 16. gas outlet pipe; 17. bracket; 18. mold. DETAILED DESCRIPTION

[0024] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar symbols throughout represent the same or similar elements or elements with 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.

[0025] Embodiment 1

[0026] like Figure 1 A metal lithium high-temperature vapor collection device shown includes a collection tank 1, which is made of 316S stainless steel, resistant to high temperature and corrosion. The collection tank 1 is fixed on the mounting portion 2 by welding. Specifically, the mounting portion 2 can be a flange cover plate in the prior art; a collection port 3 is provided at one end of the collection tank 1 away from the mounting portion 2, a spacer sleeve 4 is installed on the mounting portion 2, and a sealing cavity 6 is formed between the spacer sleeve 4 and the mounting portion 2. In order to ensure the sealing of the mounting portion 2 by the spacer sleeve 4, an elastic sealing ring (not shown in the figure) can be arranged between the spacer sleeve 4 and the mounting portion 2. A sealing member 5 is installed on the mounting portion 2. Specifically, a through hole is provided on the mounting portion 2, and the sealing member 5 is columnar. The sealing member 5 passes through the through hole and has a portion extending to the sealing cavity 6 and a portion in the collection tank 1. The sealing member 5 is opposite to the collection hole, and the length of the sealing member 5 extending into the collection tank 1 is adjustable. The collection port 3 is closed or opened by adjusting the length of the sealing member 5 extending into the collection tank 1;

[0027] like Figure 1 As shown, specifically, the portion of the seal 5 extending to the sealing cavity 6 is provided with a first magnetic component 7, the first magnetic component 7 is a magnet, and the first magnetic component 7 is fixed to the seal 5 by a fixing component, specifically, the fixing component is a screw. Of course, in some embodiments, those skilled in the art can also fix the first magnetic component 7 to the seal 5 by a thermal expansion and contraction process. Preferably, the first magnetic component 7 is a cylindrical magnet; a second magnetic component 8 is provided on the outer side of the spacer 4, the second magnetic component 8 is a magnet, the second magnetic component 8 absorbs the first magnetic component 7 by magnetic force, and the external force drives the second magnetic component 8 to move relative to the spacer 4. Since the second magnetic component 8 is absorbed by the first magnetic component 7 and the first magnetic component 7 is fixed to the seal 5, the length of the seal 5 extending into the collection tank 1 is adjusted.

[0028] In this embodiment, preferably, the seal 5 is installed on the mounting part 2 by means of a thread, and the second magnetic component 8 is a cylindrical sleeve arranged outside the spacer sleeve 4. The second magnetic component 8 can rotate relative to the spacer sleeve 4. When the collecting port 3 needs to be closed, the second magnetic component 8 is rotated, and the second magnetic component 8 absorbs the first magnetic component 7 and drives the first magnetic component 7 to rotate. The first magnetic component 7 is fixed on the seal 5, thereby driving the seal 5 to rotate. The seal will be connected to the mounting part 2 by means of a thread, so that the seal part moves toward the collecting port 3 and seals the collecting port 3.

[0029] Preferably, the collecting port 3 is cylindrical and matches with an end of the sealing member 5 away from the spacer 4 .

[0030] Preferably, it also includes a cooling structure, which is arranged on the mounting portion 2 and cools the mounting portion 2 .

[0031] Specifically, the cooling structure includes a liquid cooling chamber 20 opened on the mounting portion 2, and a liquid inlet pipe 9 and a liquid outlet pipe 10 are provided on the mounting portion 2, and the liquid inlet pipe 9 and the liquid outlet pipe 10 are both connected to the liquid cooling chamber 20, and the liquid inlet pipe 9 and the liquid outlet pipe 10 are arranged to facilitate the introduction of circulating and cooling liquid into the liquid cooling chamber 20;

[0032] Preferably, an air inlet pipe 15 and an air outlet pipe 16 are provided on the mounting portion 2 , and both the air inlet pipe 15 and the air outlet pipe 16 are connected to the collecting tank 1 , and both the air inlet pipe 15 and the air outlet pipe 16 are provided with valves.

[0033] like Figure 2 As shown, a metal lithium reduction tank using a metal lithium high temperature steam collection device includes a tank body 12 and a flange 13 fixed on the tank body 12. The above-mentioned metal lithium high temperature steam collection device is installed on the flange 13, and the collection tank 1 is located inside the tank body 12, and the installation part 2 is located outside the tank body 12.

[0034] In the process of reducing metallic lithium, the mounting portion 2 is first fixed on the flange 13, and the collecting tank 1 is located in the tank body 12. In order to ensure the sealing of the tank body 12, a sealing member 5 can be provided between the flange 13 and the mounting portion 2. Then, the material is placed in the tank body 12, and the material is located between the collecting tank 1 and the tank body 12. The collecting port 3 is ensured to be open. Then, the vacuum is evacuated through the inlet pipe 15 and the outlet pipe 16 by the vacuum equipment. Specifically, the inlet pipe 15 is connected to the argon The air outlet pipe 16 is connected to a vacuum pump. First, the vacuum pump on the air inlet pipe 15 is closed to evacuate the collecting tank 1 and the tank body 12. Then, the valve on the air inlet pipe 15 is opened, and the valve on the air outlet pipe 16 is closed. Argon gas is filled into the collecting tank 1 and the tank body 12 through the air inlet pipe 15. Then, the valve on the air inlet pipe 15 is closed and the valve on the air outlet pipe 16 is opened to evacuate the collecting tank 1 and the tank body 12. This process is repeated to remove the air in the collecting tank 1 and the tank body 12 and keep the collecting tank 1 and the tank body 12 in a vacuum state.

[0035] Then, the tank body 12 is heated to perform a metal lithium reduction reaction at a high temperature, and the high-temperature gas lithium generated during the reaction is partially discharged into the collection tank 1;

[0036] During the high-temperature reduction of metallic lithium, the coolant is transported to the liquid cooling chamber 20 by a pump, and the liquid in the liquid cooling chamber 20 is discharged through the liquid outlet pipe 10, thereby preventing the high temperature from affecting the sealing of the spacer 4 and preventing the first magnetic component 7 and the second magnetic component 8 from demagnetizing.

[0037] Preferably, the flange 13 is connected to an argon inlet pipe 14, on which a valve is provided, and the argon pipe is in communication with the tank body 12. When the reduction reaction is completed, argon gas is blown into the tank body 12 and the collecting tank 1 through the argon inlet pipe 14, so that the gas lithium in the collecting tank 1 and the tank body 12 is discharged into the collecting tank 1, and at the same time, the outer walls of the collecting port 3 and the sealing member 5 are blown to prevent liquid or gas lithium from being on the collecting port 3 and the sealing member 5.

[0038] Then, the second magnetic component 8 is rotated to drive the sealing member 5 to rotate relative to the mounting portion 2, so that the sealing member 5 seals the collecting port 3;

[0039] Then the collecting tank 1 and the mounting part 2 are removed from the flange 13, as shown in FIG. Figure 3 As shown, the collecting tank 1 is placed vertically, and specifically supported by a bracket 17, and a casting mold 18 is placed at a position relative to the bottom of the collecting tank 1 and the collecting port 3. The metallic lithium stored in the collecting tank 1 exists in liquid form, and then the sealing member 5 is driven by the second magnetic component 8 to move and open the collecting port 3, and the liquid lithium in the collecting tank 1 is transported to the casting mold 18. In this process, argon gas is discharged in the mold 18 and near the collecting port 3 to prevent the liquid lithium from reacting.

[0040] like Figure 3 As shown, preferably, a heating element 11 is wound around the outside of the collecting tank 1, and the heating element 11 may be an electric heating wire in the prior art.

[0041] In this process, the heating element 11 heats the collecting tank 1 to prevent the liquid lithium in the collecting tank 1 from solidifying and being unable to be discharged from the collecting tank 1 .

[0042] Preferably, the collecting ports 3 are provided with two, the sealing members 5 are provided with two groups, and the corresponding spacers 4 and the first magnetic components 7 and the second magnetic components 8 are also provided with two groups respectively.

[0043] Embodiment 2

[0044] like Figure 4 As shown, the difference between this embodiment and the above embodiment is that the seal 5 is slidably installed on the mounting portion 2, the second magnetic component 8 is slidably installed outside the spacer 4, and the sliding second magnetic component 8 drives the first magnetic component 7 to move to realize the opening or closing of the collection port 3 by the seal 5.

[0045] This embodiment is another way to realize opening or closing of the collecting port 3 by driving the sealing member 5 through the second magnetic part to drive the first magnetic part to move.

[0046] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0047] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0048] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0050] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A metal lithium reduction tank using a metal lithium high temperature steam collection device, comprising a collection tank (1), characterized in that: The collecting tank (1) is fixed on the mounting portion (2); a collecting port (3) is formed at one end of the collecting tank (1) away from the mounting portion (2); a spacer (4) is mounted on the mounting portion (2); a sealing cavity (6) is formed between the spacer (4) and the mounting portion (2); a sealing member (5) is mounted on the mounting portion (2); the sealing member (5) passes through the mounting portion (2) and has a portion extending into the sealing cavity (6) and a portion inside the collecting tank (1); and the length of the sealing member (5) extending into the collecting tank (1) is adjustable; the collecting port (3) can be closed or opened by adjusting the length of the sealing member (5) extending into the collecting tank (1); The portion of the sealing member (5) extending into the sealing cavity (6) is provided with a first magnetic component (7), and the outer side of the spacer (4) is provided with a second magnetic component (8), the second magnetic component (8) adsorbs the first magnetic component (7), and the second magnetic component (8) moves relative to the spacer (4) to adjust the length of the sealing member (5) extending into the collection tank (1); The sealing member (5) is slidably mounted on the mounting portion (2), and the second magnetic component (8) is slidably mounted outside the spacer (4); the sliding of the second magnetic component (8) drives the first magnetic component (7) to move so as to realize the opening or closing of the collection port (3) by the sealing member (5); It also includes a cooling structure, which is arranged on the mounting portion (2) and cools the mounting portion (2); The cooling structure comprises a liquid cooling chamber (20) opened on the mounting portion (2), a liquid inlet pipe (9) and a liquid outlet pipe (10) being provided on the mounting portion (2), and the liquid inlet pipe (9) and the liquid outlet pipe (10) are both in communication with the liquid cooling chamber (20); An air inlet pipe (15) and an air outlet pipe (16) are provided on the mounting portion (2), and the air inlet pipe (15) and the air outlet pipe (16) are both in communication with the collection tank (1); It comprises a tank body (12) and a flange (13) fixed on the tank body (12), wherein the collecting tank (1) is located inside the tank body (12) and the mounting portion (2) is located outside the tank body (12); The air inlet pipe (15) is connected to argon gas, and the air outlet pipe (16) is connected to a vacuum pump. First, the vacuum pump on the air inlet pipe (15) is closed to evacuate the collection tank (1) and the tank body (12). Then, the valve on the air inlet pipe (15) is opened, and the valve on the air outlet pipe (16) is closed. Argon gas is filled into the collection tank (1) and the tank body (12) through the air inlet pipe (15). Then, the valve on the air inlet pipe (15) is closed, and the valve on the air outlet pipe (16) is opened to evacuate the collection tank (1) and the tank body (12). The air in the collecting tank (1) and the tank body (12) is collected and kept in a vacuum state, and then the tank body (12) is heated to perform a metal lithium reduction reaction at a high temperature, and the high-temperature gas lithium generated during the reaction is partially discharged into the collecting tank (1); during the high-temperature reduction of the metal lithium, a coolant is transported to the liquid cooling chamber (20) by a pump, and the liquid in the liquid cooling chamber (20) is discharged through the liquid outlet pipe (10); when the reduction reaction is completed, the coolant is discharged through the argon inlet pipe ( 14) Argon gas is blown into the tank body (12) and the collecting tank (1), thereby causing the gaseous lithium in the collecting tank (1) and the tank body (12) to be discharged into the collecting tank (1), and at the same time, air is blown to the outer wall of the collecting port (3) and the sealing member (5) to prevent liquid or gaseous lithium from being on the collecting port (3) and the sealing member (5); the sealing member (5) is driven to rotate relative to the mounting portion (2) by rotating the second magnetic member (8), thereby causing the sealing member (5) to seal the collecting port (3); then the collecting tank (1) and the mounting portion (2) The flange (13) is disassembled and a casting mold (18) is placed at a position relative to the bottom of the collecting tank (1) and the collecting port (3). The metallic lithium stored in the collecting tank (1) is in liquid form. The sealing member (5) is then driven by the second magnetic member (8) to move and open the collecting port (3), and the liquid lithium in the collecting tank (1) is transported to the casting mold (18). During this process, argon gas is discharged in the mold (18) and near the collecting port (3) to prevent the liquid lithium from reacting.

2. The metal lithium reduction tank using the metal lithium high temperature steam collection device according to claim 1, characterized in that: The sealing member (5) is mounted on the mounting portion (2) by means of a thread, and the second magnetic member (8) is sleeved outside the spacer (4). The second magnetic member (8) rotates to drive the first magnetic member (7) to rotate, thereby realizing the opening or closing of the collection port (3) by the sealing member (5).

3. The metal lithium reduction tank using the metal lithium high temperature steam collection device according to claim 2, characterized in that: The second magnetic component (8) is cylindrical.

4. The metal lithium reduction tank using the metal lithium high temperature steam collection device according to claim 2, characterized in that: A heating element (11) is wound around the outside of the collection tank (1).

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