A self-conducting and plugging device and a casting system for high-purity metal

Abstract

The present invention relates to a self-conducting - plugging device and a casting system for high-purity metal. The self-conducting - plugging device includes a pipe body, a temperature control device, and a metal plugging material; wherein: the temperature control device is connected to the pipe body, and the metal plugging material is located inside the pipe body; the temperature control device can control the temperature of the metal plugging material to form a gas-liquid state or a solid state, so as to conduct or block the pipe body. The casting system for high-purity metal includes a feeding device, a pipeline, and the self-conducting - plugging device. The self-conducting - plugging device and the casting system for high-purity metal can achieve the opening and closing of the "valve" by controlling the temperature, and there is no loss problem during the use of the "valve". At the same time, no impurities are introduced due to the material of the "valve", and the control is convenient and it can be used for a long time.

Description

Technical Field

[0001] The present invention belongs to the field of metal casting, and particularly relates to a self-conducting - plugging device and a casting system for high-purity metal. Background Art

[0002] During the processes of metal purification, casting, etc., it is often necessary to control the on-off of the metal flow (including metal vapor flow and metal liquid flow). The temperature of the metal flow is high, and ultra-high temperature valves are required.

[0003] Although metal valves have been improved in structure and materials for a long time, due to the limitations of metal material properties, they still cannot adapt to such harsh working conditions of high temperature and high wear for a long time. Their service life is short and they are prone to leakage, which greatly affects the stability of system operation. Although the emerging ceramic valves have strong high-temperature wear resistance, since their components are usually oxides, they are prone to redox reactions with strongly reducing metals at high temperatures and fail, so they cannot be widely applied to metal flow systems. Summary of the Invention

[0004] In order to solve the problems existing in the prior art, the present invention provides a self-conducting - plugging device and a casting system for high-purity metal. The self-conducting - plugging device and the casting system for high-purity metal can achieve the opening and closing (conducting and plugging) of the "valve" by controlling the temperature, and there is no loss problem during the use of the "valve", and at the same time, no impurities are introduced due to the material of the "valve", which is convenient to control and can be used for a long time.

[0005] The concept of the present invention is: in the metal purification system and the clean casting system, the most ideal medium for controlling the on-off of the metal flow is the corresponding metal itself (for example, the medium for controlling the magnesium metal flow is controlled by metal magnesium itself). On the one hand, there is no need to worry about any adverse chemical reactions occurring and causing accidents; on the other hand, it will not introduce pollution to the production process of high-purity metal. Based on the structural design and temperature control at the place where the on-off is to be performed, the present invention can effectively control the on-off of the metal flow. The present invention will play a key role in solving important engineering problems such as continuous liquid high-purity metal production and continuous metal clean casting.

[0006] The solution of the present invention is to provide a self-conducting - plugging device, which is characterized by comprising a pipe body, a temperature control device and a metal plugging object;

[0007] Wherein: the temperature control device is connected to the pipe body, and the metal plugging object is located inside the pipe body;

[0008] The temperature control device can control the temperature of the metal plugging object to form a gaseous-liquid state or a solid state, so as to conduct or plug the pipe body.

[0009] Based on the same inventive concept, another solution of the present invention is to provide a casting system for high-purity metal, including a feeding device, a pipeline, and the self-conducting-sealing device; the feeding device is used to heat the metal to provide a metal source, and the metal sealant and the metal source are the same metal; the pipeline is connected to the feeding device; the self-conducting-sealing device is arranged in the middle section of the pipeline.

[0010] The self-conducting-sealing device of the present invention is used to control the on-off of the metal flow, similar to the function of a "valve". In the casting system for high-purity metal, the self-conducting-sealing device controls the "on-off" of casting to achieve continuous casting or continuous production of high-purity metal. Specifically, taking magnesium metal as an example, the principle is described as follows:

[0011] First, the self-conducting-sealing device is connected to the feeding device (a device capable of providing a magnesium metal source, such as a melting furnace. When magnesium metal is heated in the melting furnace, it can continuously provide a liquid magnesium metal flow and a gaseous magnesium metal flow), and the metal sealant and the metal flow are the same metal, that is, solid magnesium metal (this can greatly reduce the possibility of introducing impurities), and the metal sealant is placed inside the pipe in advance to form a seal.

[0012] Second, when the magnesium metal flow enters the pipe, at this time, since the magnesium metal sealant is in a solid state, the pipe is not conducting. Since the temperature control device can control the temperature of the metal sealant, the solid magnesium metal of the sealant is heated at this time to make it liquefy, thereby conducting the pipe and allowing the magnesium metal to flow out.

[0013] Finally, when the magnesium metal is about to flow out completely, the temperature is lowered through the temperature control device. At this time, the temperature of the magnesium metal flow decreases and forms a solid state, re-sealing the pipe.

[0014] The above is the working principle of the self-conducting-sealing device and the casting system for high-purity metal taking magnesium metal as an example.

[0015] Preferably, the temperature control device includes a temperature control coil, and the temperature control coil is sleeved outside the pipe.

[0016] Preferably, the feeding device is a metal melting furnace.

[0017] Preferably, the metal melting furnace is externally connected to a vacuum pump.

[0018] Preferably, the pipeline includes a first pipeline, and the first pipeline is connected to the lower end of the feeding device.

[0019] Preferably, the first pipeline includes an inlet part, a bending part, and an outlet part; the inlet part and the outlet part are arranged parallel and vertically; the bending part is arranged between the inlet part and the outlet part.

[0020] Preferably, the pipeline includes a second pipeline and a third pipeline. One side of the second pipeline is connected to the feeding device, and the other side is provided with a vacuum pump interface. A self-conducting and plugging device is arranged in the middle section of the second pipeline. One side of the third pipeline is connected to the upper end of the feeding device, and the other side serves as a discharge port. A self-conducting and plugging device is arranged in the middle section of the third pipeline.

[0021] Preferably, the second pipeline further includes a trap, and the trap is arranged between the self-conducting and plugging device in the second pipeline and the vacuum pump interface.

[0022] Preferably, one side of the third pipeline is communicated with the middle section of the second pipeline.

[0023] The beneficial effects of the present invention are as follows:

[0024] The self-conducting and plugging device and the high-purity metal casting system of the present invention can realize the opening and closing (conducting and plugging) of the "valve" by controlling the temperature, and there is no loss problem during the use of the "valve". At the same time, no impurities are introduced due to the material of the "valve". It is convenient to control and can be used for a long time. Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0026] Figure 1 It is a schematic structural diagram of the self-conducting and plugging device described in Embodiment 1 of the present invention.

[0027] Figure 2 It is a schematic structural diagram of the high-purity metal casting system described in Embodiment 2 of the present invention.

[0028] Figure 3 It is a schematic structural diagram of the high-purity metal casting system described in Embodiment 3 of the present invention.

[0029] Figure 4 It is a schematic structural diagram of the high-purity metal casting system described in Embodiment 4 of the present invention.

[0030] The reference numerals in the drawings are as follows:

[0031] 1 - Tube body; 2 - Temperature control device; 21 - Coil; 3 - Metal seal; 4 - Feeding device; 5 - Pipeline; 51 - First pipeline; 511 - Inlet part; 512 - Bending part; 513 - Outlet part; 52 - Second pipeline; 521 - Trap; 53 - Third pipeline; 6 - Vacuum pump interface. Detailed implementation mode

[0032] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation manners obtained by those of ordinary skill in the art without creative efforts fall within the scope protected by the present invention.

[0033] Embodiment 1

[0034] Reference Figure 1 , this embodiment provides a self-conducting - sealing device, including a tube body 1, a temperature control device 2 and a metal seal 3; wherein: the temperature control device 2 is connected to the tube body 1, and the metal seal 3 is located inside the tube body 1; the temperature control device 2 can control the temperature of the metal seal 3 to make it form a gas-liquid state or a solid state, so as to conduct or seal the tube body.

[0035] As an optional implementation manner, the temperature control device 2 includes a temperature control coil 21, and the temperature control coil 21 is sleeved outside the tube body 1. Since the temperature control coil 21 is used to control the temperature of the metal seal 3, directly sleeving it outside the tube body 1 has the most direct effect.

[0036] Embodiment 2

[0037] Reference Figure 2 , this embodiment provides a casting system for high-purity metal, including a feeding device 4, a pipeline 5, and the self-conducting - sealing device; the feeding device 4 is used to heat the metal to provide a metal source, and the metal seal 3 and the metal source are the same kind of metal; the pipeline 5 is connected and communicated with the feeding device 4; the self-conducting - sealing device is arranged in the middle section of the pipeline 5.

[0038] As an optional implementation manner, the feeding device 4 is a metal melting furnace. As the most commonly used heating device, the metal melting furnace can heat the metal to melting to provide a metal liquid flow; if the heating temperature is further increased, the metal can also be heated to a gaseous state to provide a metal vapor flow.

[0039] As an alternative embodiment, a vacuum pump is externally connected to the metal melting furnace. As described above, since the metal plugging material in the self-conducting and plugging device is placed inside the pipe body 1 in advance to form a plug, connecting a vacuum pump externally to the metal melting furnace can evacuate the system, thereby reducing the temperature during the melting or vaporization of the metal, making it easier for the metal to flow out, and at the same time reducing energy consumption, achieving two goals with one action.

[0040] As an alternative embodiment, the pipeline 5 includes a first pipeline 51, and the first pipeline 51 is connected to the lower end of the feeding device 4. When the metal flow is in liquid form, it directly flows out from the bottom of the feeding device 4, making casting more convenient.

[0041] Embodiment 3

[0042] Reference Figure 3 , this embodiment further provides a casting system for high-purity metal. The difference from Embodiment 3 is that in this embodiment, the first pipeline 51 includes an inlet part 511, a bending part 512, and an outlet part 513; the inlet part 511 and the outlet part 513 are arranged parallel and vertically; the bending part 512 is arranged between the inlet part 511 and the outlet part 513.

[0043] With such an arrangement, the bending part 512 can always maintain a state of metal flow, which is beneficial for cooling and plugging at the end of casting.

[0044] Embodiment 4

[0045] Reference Figure 4 , this embodiment continues to provide a casting system for high-purity metal. The difference from Embodiment 3 is that the pipeline 5 includes a second pipeline 52 and a third pipeline 53. One side of the second pipeline 52 is connected to the feeding device 4, and the other side is provided with a vacuum pump interface 6, and a self-conducting and plugging device is arranged in the middle of the second pipeline 52; one side of the third pipeline 53 is connected to the upper end of the feeding device 4, and the other side is used as an outlet for casting, and a self-conducting and plugging device is arranged in the middle of the third pipeline 53.

[0046] When the metal flow is in the form of a metal vapor flow, the casting system described in this embodiment can be used, specifically as follows:

[0047] Before use, a metal plugging object 3 is installed in the self-conducting and plugging device in the third pipeline 53 by interference fit, while no metal plugging object 3 is installed in advance in the second pipeline 52, and an external vacuum pump is connected to the vacuum pump interface 6 for evacuating the system. When the vacuum degree reaches the requirement, the feeding device 4 is operated to heat the metal to form a metal vapor flow, and enter the third pipeline 53 through the upper end of the feeding device 4; while the feeding device is running, the self-conducting and plugging device set on the second pipeline 52 is cooled by the temperature control device 2. As the metal vapor flow in the second pipeline 52 gradually increases, the metal vapor flow will gradually liquefy in the second pipeline 52 and further solidify into a solid state, thereby blocking the second pipeline 52; at this time, the metal plugging object 3 installed in advance in the third pipeline 53 by interference fit is heated by the temperature control device 2 to melt it and flow out from the discharge port. Therefore, the state during the casting process is: the temperature control device 2 in the second pipeline 52 continuously provides a low temperature sufficient to solidify the metal, so that the metal solidifies and blocks the second pipeline 52; and the temperature control device 2 in the third pipeline 53 continuously provides a temperature that can make the metal vapor flow form a liquid state and flow out from the discharge port. After the casting is completed, the temperature control device 2 is lowered to block the third pipeline 53.

[0048] As an optional embodiment, the second pipeline 52 further includes a trap 521, and the trap 521 is arranged between the self-conducting-blocking device in the second pipeline 52 and the vacuum pump interface 6. As described above, after the casting is completed, metal vapor must still remain in the pipeline 5 in the system. At this time, the third pipeline 53 is kept in a blocked state, and the temperature control device of the second pipeline 52 is heated to release the blocking state. At this time, the vacuum pump is restarted. During the casting process, when the second pipeline is blocked, the vacuum pump can stop working; and at this time, it is restarted, and the metal vapor in the pipeline 5 is extracted, and condensed and crystallized in the trap 521. After completion, the trap is removed and cleaned and reused to prevent the metal vapor from being drawn into the vacuum pump.

[0049] As an optional implementation, one side of the third pipeline 53 is connected to the middle section of the second pipeline 52 .

[0050] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A casting system for high-purity metal, characterized in that, it includes a feeding device (4), a pipeline (5), and a self-conducting and plugging device; The self-conducting and plugging device includes a pipe body (1), a temperature control device (2), and a metal plugging material (3); the temperature control device (2) is connected to the pipe body (1), and the metal plugging material (3) is located inside the pipe body (1); The temperature control device (2) can control the temperature of the metal plugging material (3) to make it form a gas-liquid state or a solid state, so as to conduct or block the pipe body; The feeding device (4) is a metal melting furnace; the feeding device (4) is used to heat the metal to provide a metal vapor flow, and the metal plugging material (3) is the same metal as the metal source; the pipeline (5) is connected to the feeding device (4); the self-conducting and plugging device is arranged in the middle section of the pipeline (5); The pipeline (5) includes a second pipeline (52) and a third pipeline (53). One side of the second pipeline (52) is connected to the feeding device (4), and the other side is provided with a vacuum pump interface (6). A self-conducting and plugging device is arranged in the middle section of the second pipeline (52); One side of the third pipeline (53) is connected to the upper end of the feeding device (4), and the other side is used as an outlet. A self-conducting and plugging device is arranged in the middle section of the third pipeline (53).

2. The casting system for high-purity metal according to claim 1, characterized in that, the temperature control device (2) includes a temperature control coil (21), and the temperature control coil (21) is sleeved outside the pipe body (1).

3. The casting system for high-purity metal according to claim 1, characterized in that, the metal melting furnace is externally connected to a vacuum pump.

4. The casting system for high-purity metal according to claim 1, characterized in that, the second pipeline (52) further includes a trap (521), and the trap (521) is arranged between the self-conducting and plugging device in the second pipeline (52) and the vacuum pump interface (6).

5. The casting system for high-purity metal according to claim 1, characterized in that, one side of the third pipeline (53) is connected to the middle section of the second pipeline (52).

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