Lithium ingot pouring system

Abstract

The invention discloses a lithium ingot pouring system, which belongs to the technical field of metal casting and comprises a cooling device, a pouring device and a pouring mold. The cooling device is cylindrical, the grooves in the upper surface of the cooling device are evenly distributed in the circumferential direction, and the pouring molds are arranged in the grooves. The pouring device is used for pouring lithium liquid into the pouring mold and comprises an electric control valve, an inner sleeve and an outer sleeve, and the inner sleeve is sleeved with the outer sleeve which is driven by a servo electric cylinder to ascend and descend. And a plurality of groups of heating devices and feeding pipelines are arranged above the cooling device. According to the system, multi-mold circulating pouring, heating feeding and ingot taking are achieved through the rotating structure, and the production efficiency and quality are improved. Through the arrangement of the cooling device, the up-down temperature difference of the pouring mold can be reduced, and the shrinkage cavity size of a lithium ingot is effectively reduced. The pouring device can control the phenomena of gas mixing and liquid splashing in the pouring process, and it is guaranteed that the lithium ingot is free of pores and uniform in component.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium metal casting, and in particular to a lithium ingot casting system. Background Art

[0002] Lithium metal has excellent properties such as the lowest electronegativity, high specific heat and electrical conductivity, and is widely used in many fields such as atomic energy, nuclear energy, aerospace, metallurgy, chemical industry, glass and ceramics, medicine and health, organic synthesis, and lithium batteries. Existing lithium metal ingot preparation generally involves pouring lithium liquid onto a mold, followed by natural cooling until the lithium liquid is completely solidified, resulting in low production efficiency. At the same time, due to the influence of the lithium liquid filling sequence, the mold temperature has a gradient distribution from low at the top to high at the bottom. Simultaneously, convection occurs between the upper part of the mold and the ambient gas, resulting in a lower temperature at the top. Due to the liquid and solidification shrinkage of the lithium liquid, the lower lithium liquid shrinks in volume during solidification, resulting in volume loss. At this time, due to the lower temperature of the upper mold, the upper lithium liquid has already begun to solidify around it, making it unable to compensate for the loss of the lower lithium liquid, resulting in the formation of larger shrinkage cavities in the lithium ingot. Summary of the Invention

[0003] In view of this, the present invention discloses a lithium ingot casting system, and the specific scheme is as follows.

[0004] A lithium ingot pouring system, comprising a cooling device, a pouring device, and a pouring mold; The upper surface of the cooling device is provided with a groove for placing the casting mold, and a accommodating space is provided inside the groove. The side wall of the cooling device is provided with a liquid inlet and a liquid outlet, and coolant is introduced into the accommodating space of the cooling device; the lower part of the casting mold is located in the groove on the upper surface of the cooling device; the liquid outlet of the casting device is located above the casting mold, and the casting device is used to transport lithium liquid into the casting mold.

[0005] As a supplement to the technical solution of the present invention, the cooling device is a circular columnar structure, and the grooves provided on the upper surface of the cooling device are provided in a plurality of groups and are arranged in a uniform array along the circumference of the cooling device; It also includes a fixed base, a rotating shaft, and a rotating drive mechanism, wherein the rotating shaft is arranged on the lower bottom surface of the cooling device, and the lower end of the rotating shaft is connected to the fixed base through a bearing; A rotation drive mechanism for driving the rotating shaft to rotate is provided below the cooling device. The rotation drive mechanism includes a motor and a transmission gear. The transmission gear is sleeved on the rotating shaft. The motor is connected to the transmission gear to drive the transmission gear to rotate and drive the rotating shaft to rotate.

[0006] As a supplement to the technical solution of the present invention, the rotation drive mechanism further includes a servo motor, an angle sensor, and a planetary gearbox; The servo motor is connected to the transmission gear through a planetary gearbox. The angle sensor is arranged in the planetary gearbox and rotates synchronously with the driven gear of the planetary gearbox to detect the rotation angle of the output end of the planetary gearbox.

[0007] As a supplement to the technical solution of the present invention, the pouring device includes an electric regulating valve, an inner pouring tube, an outer pouring tube, a support frame, and a lithium liquid pipeline, a laser rangefinder, and a servo electric cylinder arranged on the support frame; One end of the lithium liquid pipeline outlet is connected to a vertically arranged inner casting tube, the outer casting tube is sleeved on the inner casting tube, and a linear bearing is connected between the outer casting tube and the inner casting tube; the push rod of the servo electric cylinder is connected to the upper end of the outer casting tube through a connecting rod; the laser rangefinder is arranged above the casting mold to monitor the liquid level in the mold.

[0008] As a supplement to the technical solution of the present invention, the pouring device further includes an induction coil, which is wound around the outer pouring tube.

[0009] As a supplement to the technical solution of the present invention, the pouring device also includes a solenoid valve and a liquid level probe. The solenoid valve is arranged on the pouring pipeline and is located between the electric regulating valve and the liquid inlet of the pouring inner tube; the liquid level probe is arranged at the lower part of the outer side wall of the pouring outer tube.

[0010] As a supplement to the technical solution of the present invention, the cross section of the lower end of the inner pouring tube at the liquid outlet is a tapered structure that is narrow at the top and wide at the bottom; A liquid plug is provided at the liquid outlet position at the lower end of the casting outer tube, and the upper part of the liquid plug is provided with a conical part adapted to the cross-section of the liquid outlet at the lower end of the casting inner tube. The side surface of the lower part of the liquid plug is provided with a protrusion, which is distributed at intervals along the circumference of the liquid plug and is fixedly connected to the inner side wall of the casting outer tube.

[0011] As a supplement to the technical solution of the present invention, it also includes a heating device, which is arranged above the cooling device. The heating device is provided with at least two groups, and two adjacent groups of heating devices are correspondingly located directly above two adjacent casting molds. When the casting device completes the pouring of lithium liquid into the current casting mold, the cooling device rotates to rotate the next casting mold to directly below the liquid outlet of the casting device, and the casting mold that has completed the pouring is synchronously rotated to the lower covering area of ​​the heating device; The heating device comprises a fixing plate and an industrial electric heating blanket, wherein the industrial electric heating blanket is arranged on the fixing plate.

[0012] As a supplement to the technical solution of the present invention, it further comprises feeding lines, wherein at least two groups of feeding lines are provided, and the liquid outlets of two adjacent groups of feeding lines are correspondingly located directly above the two adjacent groups of casting moulds.

[0013] As a supplement to the technical solution of the present invention, an ingot-taking robot is further included. The ingot-taking robot is arranged above the cooling device and is used to clamp the lithium ingot in the casting mold.

[0014] Beneficial effects: The present invention has the following beneficial effects: 1. The cooling device reduces the temperature difference between the upper and lower parts of the mold. The heating device further enables the lithium ingot to solidify sequentially from bottom to top, effectively reducing the size of the shrinkage cavity. The cooling device centrally cools the casting mold, improving cooling efficiency. It also reduces the pressure loss in the pipelines of a separate cooling method, lowering the energy consumption of the heat exchange cycle. Furthermore, the fewer interfaces reduce the risk of leakage at these interfaces.

[0015] 2. Through the setting of the pouring device, there will be no gas mixing and liquid splashing during pouring, and the lithium ingots have no pores and uniform composition.

[0016] 3. Use multiple feeding lines to perform feeding operations in sequence to minimize the loss caused by lithium liquid solidification and reduce the size of the shrinkage cavity of the lithium ingot. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0018] Figure 2 It is a schematic structural diagram of the cooling device of the present invention.

[0019] Figure 3 It is a schematic structural diagram of the cooling device of the present invention.

[0020] Figure 4 This is a structural schematic diagram of the state in which the liquid plug of the casting outer tube of the present invention seals the lower end of the casting inner tube.

[0021] Figure 5 This is a structural schematic diagram of the liquid plug of the outer casting tube and the lower end of the inner casting tube in the separated state according to the present invention.

[0022] Figure 6 It is a schematic diagram of the top structure of the present invention.

[0023] In the figure: 1. Cooling device, 2. Pouring device, 3. Pouring mold, 4. Electric regulating valve, 5. Pouring inner tube, 6. Pouring outer tube, 7. Ingot removal robot, 8. Lithium liquid pipeline, 9. Laser rangefinder, 10. Servo cylinder, 11. Solenoid valve, 12. Liquid level probe, 13. Liquid plug, 14. Feeding pipeline, 15. Heating device. DETAILED DESCRIPTION

[0024] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0025] In the present invention, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0026] like Figures 1 to 6 As shown, a lithium ingot casting system is used for casting lithium ingots, including a cooling device 1, a casting device 2, and a casting mold 3.

[0027] The cooling device 1 is made of stainless steel as a whole, and a groove is provided on its upper surface for placing the casting mold 3. A accommodating space is provided inside the cooling device 1, and a coolant is provided inside the cooling device 1. A liquid inlet and a liquid outlet are provided on the side wall of the cooling device 1 for filling the cooling device 1 with coolant. The lower part of the casting mold 3 is located in the groove on the upper surface of the cooling device 1. The coolant can transfer heat with the lower part of the casting mold 3, thereby improving the cooling efficiency of the lower part of the casting mold 3.

[0028] The pouring device 2 is located above the cooling device 1 , and the liquid outlet of the pouring device 2 is located above the pouring mold 3 , and the lithium liquid is introduced into the mold through the pouring pipeline.

[0029] The present invention reduces the temperature of the lower part of the mold by using coolant, thereby improving the cooling efficiency of the lithium liquid, thereby improving the production efficiency of lithium ingots, and at the same time avoiding the occurrence of shrinkage cavities caused by the large temperature difference between the lithium liquid in the upper and lower parts of the mold.

[0030] Preferably, the water inlet and outlet of the cooling device 1 are connected to the heat exchange station to ensure that the water inlet temperature of the cooling device 1 is ≤20°C and the outlet temperature is about 35°C, which meets the heat exchange required for rapid cooling of the metal.

[0031] Preferably, the casting mold 3 is machined from stainless steel, has a smooth inner wall, and is provided with a draft angle, and the draft angle is about 1°.

[0032] As a preferred technical solution of the present invention, the cooling device 1 is a circular columnar structure, and the grooves provided on the upper surface of the cooling device 1 are provided in several groups and are evenly arranged along the circumference of the cooling device 1 .

[0033] The cooling device 1 also includes a fixed base, a rotating shaft, and a rotating drive mechanism. The rotating shaft is arranged on the bottom surface of the cooling device 1, and the lower end of the rotating shaft is connected to the fixed base through a bearing, so that the cooling device 1 can rotate relative to the fixed base.

[0034] A rotation drive mechanism for driving the rotation shaft is provided below the cooling device 1 .

[0035] The rotary drive mechanism includes a motor and a transmission gear. The transmission gear is sleeved on the rotating shaft. The motor is connected to the transmission gear and drives the transmission gear to rotate, thereby driving the rotating shaft to rotate.

[0036] As a supplement to the above technical solution, the rotation drive mechanism further includes a servo motor, an angle sensor, and a planetary gearbox.

[0037] The servo motor is connected to the transmission gear through a planetary gearbox, and the rotation of the transmission gear is controlled by the servo motor and the planetary gearbox. The angle sensor is arranged in the planetary gearbox and rotates synchronously with the driven gear of the planetary gearbox to detect the rotation angle of the output end of the planetary gearbox. By setting the angle sensor, cooperating with the terminal controller and the servo motor, the rotation angle of the rotating shaft of the cooling device 1 can be adjusted, and each group of molds on the cooling device 1 can be controlled to move to the bottom of the pouring device 2. For example, after the lithium liquid pouring of the first pouring mold 3 is completed, the controller sends an electrical signal to the servo motor to make the servo motor work, and the angle sensor detects the rotation angle of the output end of the planetary gearbox and calculates the rotation angle of the transmission gear arranged on the rotating shaft. When the second mold rotates to the bottom of the pouring device 2, the controller controls the servo motor to stop rotating.

[0038] As a preferred technical solution of the present invention, in the traditional pouring process, the liquid outlet of the pouring device 2 is located at a fixed position above the pouring mold 3. The height difference between the liquid outlet and the bottom of the pouring mold 3 is large, which easily causes lithium liquid splashing, resulting in uneven lithium ingot composition. At the same time, the lithium liquid is in contact with the air for a long time during the falling process, which easily leads to the formation of air holes in the lithium ingot. To solve the above technical problems, the pouring device 2 includes an electric regulating valve 4, an inner pouring tube 5, an outer pouring tube 6, a support frame, and a lithium liquid pipeline 8, a laser rangefinder 9, and a servo cylinder 10 arranged on the support frame.

[0039] One end of the liquid outlet of the lithium liquid pipeline 8 is connected to a vertically arranged casting inner tube 5, and the casting outer tube 6 is sleeved on the casting inner tube 5. A linear bearing is connected between the casting outer tube 6 and the casting inner tube 5, and the casting outer tube 6 can move up and down on the casting inner tube 5 through the linear bearing.

[0040] The laser rangefinder 9 is arranged above the casting mold 3 to monitor the liquid level in the mold. The push rod of the servo electric cylinder 10 is connected to the upper end of the casting outer tube 6 through a connecting rod.

[0041] The laser rangefinder 9 transmits the monitored liquid level data to the control terminal, and the control terminal controls the extension length of the push rod of the servo electric cylinder 10 to keep the lower end of the casting outer tube 6 at a constant distance from the liquid surface.

[0042] Through the above-mentioned arrangement, it can be ensured that during the entire pouring process, the liquid outlet at the lower end of the pouring outer tube 6 and the liquid level in the pouring mold 3 are always kept at a distance of about 10 mm, effectively reducing the contact time between the lithium liquid and the air, while avoiding the technical problem of lithium liquid splashing caused by a large height difference between the liquid outlet at the lower end of the pouring outer tube 6 and the liquid level.

[0043] As a preferred technical solution of the present invention, the pouring device 2 also includes an induction coil, which is wound around the pouring outer tube 6. By heating the induction coil, it is possible to avoid the lithium liquid on the inner wall of the pouring outer tube 6 solidifying when it is cold, resulting in the technical problem that the pouring outer tube 6 cannot slide up and down on the pouring inner tube 5.

[0044] As a preferred technical solution of the present invention, the pouring device 2 also includes a solenoid valve 11 and a liquid level probe 12. The solenoid valve 11 is arranged on the pouring pipeline and is located between the electric regulating valve 4 and the liquid inlet of the inner pouring tube 5. The liquid level probe 12 is arranged on the outer wall of the outer pouring tube 6. The liquid level probe 12 is used to detect the pouring speed. The control terminal calculates the liquid level change data collected by the liquid level probe 12. When the pouring speed is too fast and the pouring speed cannot be adjusted according to the electric regulating valve 4, the liquid level rises too fast in this state. The solenoid valve 11 can be opened to cut off the lithium liquid pipeline 8 to stop pouring.

[0045] As a supplement to the above technical solution, the cross section of the lower end of the inner pouring tube 5 at the liquid outlet is a tapered structure that is narrow at the top and wide at the bottom.

[0046] A liquid plug 13 is provided at the liquid outlet at the lower end of the outer casting tube 6. The plug 13 is connected to the inner sidewall of the outer casting tube 6. The upper portion of the plug 13 is provided with a tapered portion that matches the cross-section of the liquid outlet at the lower end of the inner casting tube 5. The lower side surface of the plug 13 is provided with protrusions. The protrusions are spaced circumferentially along the plug 13 and fixedly connected to the inner sidewall of the outer casting tube 6, allowing the lithium liquid to flow into the casting mold 3 through the gap between adjacent protrusions. When the solenoid valve 11 cuts off the lithium liquid pipeline 8, the servo cylinder 10 drives the outer casting tube 6 upward, causing the upper portion of the plug 13 to be inserted into the liquid outlet at the lower end of the inner casting tube 5, thereby sealing the lithium liquid within the inner casting tube 5.

[0047] As a preferred technical solution of the present invention, it also includes a heating device 15, which is arranged above the cooling device 1. The heating device 15 is provided with at least two groups, and the two adjacent groups of heating devices 15 are correspondingly located directly above the two adjacent casting molds 3. When the casting device 2 completes the lithium liquid pouring of the current casting mold 3, the cooling device 1 rotates to rotate the new casting mold 3 to directly below the liquid outlet of the casting device 2, and the casting mold 3 that has completed the pouring can be rotated to the lower covering area of ​​the heating device 15. Through the above arrangement, under the condition that the pouring speed of the casting device 2 is constant, by setting the number of heating devices 15, it is possible to control the air heating time above the casting mold 3 that has completed the pouring, ensure the effect of cooling and solidifying the lithium liquid in the casting mold 3, prevent the technical problem of high temperature at the bottom and low temperature at the upper opening in the casting mold 3, realize gradient cooling of the lithium liquid in the casting mold 3, and ensure the solidification effect.

[0048] As a supplement to the above technical solution, the heating device 15 includes a fixed plate and an industrial electric heating blanket. The industrial electric heating blanket is fixed on the fixed plate, and heat is provided by the industrial electric heating blanket. The fixed plate is used to support the industrial electric heating blanket.

[0049] As a preferred technical solution of the present invention, the present invention further includes feeding lines 14. The feeding lines 14 are provided in at least two groups, with the outlets of two adjacent groups of feeding lines 14 correspondingly located directly above two adjacent groups of casting molds 3. Since shrinkage loss occurs due to solidification after each new liquid metal is replenished, multiple feeding lines 14 are used to feed the liquid in sequence, thereby minimizing the loss caused by solidification of the lithium liquid and reducing the size of the shrinkage cavity of the lithium ingot.

[0050] When the lithium liquid in the casting mold 3 below the heating device 15 is completely solidified, the cooling device 1 rotates to rotate the casting mold 3 to the lower covering area of ​​the heating device 15 .

[0051] As a preferred technical solution of the present invention, the liquid outlet of the pouring device 2, the heating device 15, and the liquid outlet of the feeding line 14 are arranged at the stations uniformly along the circumference of the cooling device 1. For example, when two groups of heating devices 15 and feeding lines 14 are provided, the pouring device 2 is located at the first station, the two groups of heating devices 15 are located at the second station and the third station respectively, and the liquid outlets of the two groups of feeding lines 14 are located at the fourth station and the fifth station. The five groups of stations are uniformly arrayed along the circumference of the cooling device 1, and the array angle is the same as the array angle of the casting mold 3.

[0052] As a preferred technical solution of the present invention, an ingot removal robot 7 is also included. The ingot removal robot 7 is arranged above the cooling device 1 and is used to clamp the lithium ingot in the casting mold 3. By automatically removing the ingot, the damage to the surface of the lithium ingot during manual operation is reduced; at the same time, the harm to personnel caused by overheating of the lithium ingot during manual operation is reduced. The entire system is automatically adjusted through the control terminal settings; it ensures the consistency of the finished lithium ingots, reduces the size of the shrinkage holes in the lithium ingots, reduces the workload of the subsequent cutting process, and saves raw material costs and energy consumption.

[0053] The above description is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, can make equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A lithium ingot casting system, characterized in that: It includes a cooling device (1), a pouring device (2), and a pouring mold (3); The upper surface of the cooling device (1) is provided with a groove for placing the casting mold (3), the lower part of the casting mold (3) is located in the groove on the upper surface of the cooling device (1), an accommodating space is provided inside the cooling device (1), and a liquid inlet and a liquid outlet are provided on the side wall of the cooling device (1), and cooling liquid is introduced into the accommodating space of the cooling device (1); the liquid outlet of the pouring device (2) is located above the casting mold (3), and the pouring device (2) is used to transport lithium liquid into the casting mold (3).

2. A lithium ingot pouring system according to claim 1, characterized in that: The cooling device (1) is a circular columnar structure, and the grooves provided on the upper surface of the cooling device (1) are provided in a plurality of groups and are evenly arranged in an array along the circumference of the cooling device (1); It also includes a fixed base, a rotating shaft, and a rotating drive mechanism, wherein the rotating shaft is arranged on the lower bottom surface of the cooling device (1), and the lower end of the rotating shaft is connected to the fixed base through a bearing; A rotary drive mechanism for driving the rotating shaft to rotate is provided below the cooling device (1). The rotary drive mechanism comprises a motor and a transmission gear. The transmission gear is sleeved on the rotating shaft. The motor is connected to the transmission gear and drives the transmission gear to rotate, thereby driving the rotating shaft to rotate.

3. A lithium ingot pouring system according to claim 2, characterized in that: The rotary drive mechanism also includes a servo motor, an angle sensor, and a planetary gearbox; The servo motor is connected to the transmission gear through a planetary gearbox. The angle sensor is arranged in the planetary gearbox and rotates synchronously with the driven gear of the planetary gearbox to detect the rotation angle of the output end of the planetary gearbox.

4. A lithium ingot pouring system according to claim 2, characterized in that: The pouring device (2) includes an electric regulating valve (4), an inner pouring tube (5), an outer pouring tube (6), a support frame, and a lithium liquid pipeline (8), a laser rangefinder (9), and a servo electric cylinder (10) arranged on the support frame. One end of the liquid outlet of the lithium liquid pipeline (8) is connected to a vertically arranged inner casting tube (5), the outer casting tube (6) is sleeved on the inner casting tube (5), and a linear bearing is connected between the outer casting tube (6) and the inner casting tube (5); the push rod of the servo electric cylinder (10) is connected to the upper end of the outer casting tube (6) through a connecting rod; the laser rangefinder (9) is arranged above the casting mold (3) and is used to monitor the liquid level in the mold.

5. A lithium ingot pouring system according to claim 4, characterized in that: The pouring device (2) further comprises an induction coil, which is wound around the outer pouring tube (6).

6. A lithium ingot pouring system according to claim 4, characterized in that: The pouring device (2) further comprises a solenoid valve (11) and a liquid level probe (12). The solenoid valve (11) is arranged on the pouring pipeline and is located between the electric regulating valve (4) and the liquid inlet of the pouring inner tube (5); the liquid level probe (12) is arranged at the lower part of the outer side wall of the pouring outer tube (6).

7. A lithium ingot pouring system according to claim 4, characterized in that: The cross section of the lower end of the inner pouring tube (5) at the liquid outlet is a tapered structure that is narrow at the top and wide at the bottom; A liquid plug (13) is provided at the liquid outlet position at the lower end of the casting outer tube (6), and a conical portion is provided on the upper portion of the liquid plug (13) that is adapted to the cross-section of the liquid outlet at the lower end of the casting inner tube (5). A protrusion is provided on the side surface of the lower portion of the liquid plug (13), and the protrusions are distributed at intervals along the circumference of the liquid plug (13) and are fixedly connected to the inner side wall of the casting outer tube (6).

8. A lithium ingot pouring system according to claim 2, characterized in that: The invention also includes a heating device (15), wherein the heating device (15) is arranged above the cooling device (1), and the heating device (15) is provided with at least two groups, and two adjacent groups of heating devices (15) are correspondingly located directly above two adjacent groups of casting molds (3). When the casting device (2) completes the lithium liquid casting of the current casting mold (3), the cooling device (1) rotates to rotate the next casting mold (3) to directly below the liquid outlet of the casting device (2), and the casting mold (3) that has completed the casting is synchronously rotated to the lower covering area of ​​the heating device (15); The heating device (15) comprises a fixed plate and an industrial electric heating blanket, wherein the industrial electric heating blanket is arranged on the fixed plate.

9. A lithium ingot pouring system according to claim 8, characterized in that: It also includes a feeding pipeline (14), wherein at least two groups of the feeding pipeline (14) are provided, and the liquid outlets of two adjacent groups of feeding pipelines (14) are correspondingly located directly above the two adjacent groups of casting molds (3).

10. The lithium ingot pouring system according to claim 1, characterized in that: It also includes an ingot taking robot (7), which is arranged above the cooling device (1) and is used to clamp the lithium ingot in the casting mold (3).

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