A vacuum purification device for high-purity aluminum

Abstract

This invention relates to the field of high-purity aluminum purification technology and discloses a high-purity aluminum vacuum purification device, including a support and a crucible fixedly connected to the top of the support. The crucible has several release grooves on its bottom circumference, a heating assembly is arranged around the crucible, a sealing cover is movably hinged to the top of the crucible, an air extraction port is provided at the upper end of the sealing cover, a locking ring is rotatably connected to the bottom of the sealing cover, and several locking grooves are arranged around the outer circumference of the locking ring. Several locking blocks arranged in a circumferential array are fixedly connected to the inner wall of the top of the crucible. This invention, through the automatic closing and locking assembly of the sealing cover, can control the uniform pressure applied to all parts of the sealing cover edge, resulting in rapid and reliable sealing operation, thereby enhancing sealing performance and improving purification quality. Furthermore, without affecting purification quality, it greatly increases the purification rate of high-purity aluminum, achieving uniform cooling of the aluminum ingot from the core to the outer wall, ensuring the stability of directional crystallization.

Description

Technical Field

[0001] This invention relates to the field of high-purity aluminum purification technology, and specifically to a high-purity aluminum vacuum purification device. Background Technology

[0002] High-purity aluminum possesses excellent electrical conductivity, ductility, light reflectivity, malleability, corrosion resistance, and extremely low magnetic permeability, making it widely used in industries such as electronics, energy, transportation, medical, computers, aerospace, astronomy, and chemicals. Methods for extracting high-purity aluminum include: three-layer electrolysis, segregation, combined methods, zone melting, and organic solution electrolysis. Segregation purification utilizes the phenomenon that impurity elements are present in solidified aluminum at much lower concentrations than in the melt. The binary metal liquid is slowly cooled to slightly above its lowest melting point, causing the main aluminum metal to precipitate as relatively pure solid crystals, while impurity elements accumulate in the liquid. The liquid and solid are then separated, and this process is repeated to obtain a relatively pure metal.

[0003] The invention patent with publication number CN116294581B discloses a vacuum purification furnace for high-purity aluminum production and its usage method, belonging to the field of high-purity aluminum technology. It includes a base, an outer cylinder, a spiral heater, and an inner cylinder. The outer cylinder is connected to a rotating assembly, which is movably connected to the inner cylinder. The rotating assembly is used to drive the inner cylinder to rotate. The upper end of the upright part of the base is connected to a misalignment drive assembly, which is connected to a cover. The misalignment drive assembly is also connected to a movable cooling assembly, which moves inside the inner cylinder to achieve movable cooling.

[0004] Chinese patent application CN115323191A discloses a vacuum purification device and process for ultra-high purity aluminum, specifically relating to the field of aluminum processing technology. The device includes an outer frame, an electromagnetic stirring assembly on the inner wall of the outer frame, an electromagnetic heating assembly on the inner wall of the outer frame, a heat insulation plate on the inner wall of the outer frame, a crucible on the upper surface of the heat insulation plate, and an extension sleeve on the lower surface of the crucible. The invention utilizes a vacuum pump assembly, a first intermediate tube, a first moving rod, a slider, a sliding groove, a first pin, a second pin, a limiting block, and a connecting groove. The first slider moves the limiting block closer to the connecting groove. When the limiting block contacts the connecting groove, it limits the position of the top cover.

[0005] In the aforementioned patent, the high-purity aluminum vacuum purification furnace's top cover, driven by a side-mounted component, automatically falls onto the outer cylinder after deflection, achieving automatic sealing. However, it lacks effective pressure tightening for sealing, resulting in limited sealing strength and a tendency for localized leaks, thus affecting subsequent vacuuming and the purification of high-purity aluminum. When using radial cooling pipes to cool the molten aluminum from bottom to top within the inner cylinder, compared to a typical high-purity aluminum vacuum purification device with a narrow neck and a wider top, this furnace, being essentially a straight cylinder, allows the solid-liquid interface to move upwards along the inner wall of the container, resulting in a smoother melting process. The liquid tends to flow irregularly, resulting in poor purification. Typical crucibles with narrow necks usually only have one narrow neck, requiring a long lowering space for subsequent aluminum ingot crystallization, thus reducing the purification rate and causing the equipment to be too tall and bulky. Furthermore, both methods only allow for single-stage cooling from the outside or inside, resulting in poor cooling efficiency, unstable directional crystallization, and potential defects in aluminum ingot forming. Although radial cooling pipes achieve internal cooling, the traction parts on the cooling pipes tend to adhere to molten liquid as they move up and down, affecting the stability of the drive and making them unreliable. Summary of the Invention

[0006] The purpose of this invention is to address the problems of poor sealing performance, large size, low purification rate, and unstable cooling effect in general high-purity aluminum vacuum purification devices during use. This invention provides a high-purity aluminum vacuum purification device.

[0007] To achieve the above objectives, the present invention specifically adopts the following technical solution:

[0008] A high-purity aluminum vacuum purification device includes a support and a crucible fixedly connected to the top of the support. The bottom of the crucible has several release grooves around its circumference. A heating component is arranged around the crucible. A sealing cover is movably hinged to the top of the crucible. An air extraction port is provided at the upper end of the sealing cover. A locking ring is rotatably connected to the bottom of the sealing cover. Several slots are arranged around the outer circumference of the locking ring. Several locking blocks are fixedly connected to the inner wall of the top of the crucible in a circumferential array. A locking component is provided at the right end of the sealing cover to drive the sealing cover to close under pressure.

[0009] The bottom of the crucible is rotatably sealed with a valve plate. Several cooling sleeves, which are misaligned with the release groove and arranged in a circular array, are fixedly inserted into the bottom of the valve plate. The cooling sleeve cavity is provided with a spiral water channel. An inner cooling pipe is fixedly inserted into the inner wall of the top of the cooling sleeve. A cooling circulation component is fixedly connected to the center of the bottom of the valve plate. An adjustment component that drives the valve plate to deflect and draws down the crystals is provided at the upper end of the support.

[0010] Furthermore, the heating assembly includes an electromagnetic heating mechanism installed around the crucible, and an electromagnetic stirring mechanism is installed around the electromagnetic heating mechanism.

[0011] Furthermore, the locking assembly includes a worm gear ring rotatably connected to the lower wall of the sealing cover. The inner wall of the worm gear ring is provided with three protrusions arranged in a circumferential array. The outer wall of the locking ring is provided with a groove that engages with the protrusions. The right end of the sealing cover is rotatably sealed and connected to a U-shaped worm that meshes with the worm gear ring. The bottom of the right end of the sealing cover is provided with a limiting groove corresponding to the U-shaped worm. The front and rear ends of the U-shaped worm are movably hinged to the outer wall of the electromagnetic stirring mechanism with telescopic cylinders.

[0012] Furthermore, the card slot is in the shape of an inverted L and the bottom is provided with a lower wall of a locking ring. Corresponding chamfers are provided between the card slot and the card block. The height of the lower wall of the card slot is greater than the height of the lower wall of the card block.

[0013] Furthermore, a valve port that is misaligned with the air extraction port is provided on the right side of the locking ring, and the air extraction port is externally connected to an air extraction mechanism.

[0014] Furthermore, the cooling circulation assembly includes an input pipe fixedly connected to the center of the bottom of the valve plate, an L-shaped output pipe fixedly sleeved on the outside of the input pipe, an inner cooling pipe in the shape of a hanging ring with the centrally located ring within the cooling sleeve, and micro-holes coaxial with the annular portion of the inner cooling pipe and having a diameter smaller than the diameter of the annular portion of the inner cooling pipe are opened on the circumference of the lower wall of the crucible. The two ends of the inner cooling pipe are respectively connected to the input pipe and the output pipe, and the input end of the inner cooling pipe passes through the output pipe. The output pipe and the input pipe correspond to the inlet and outlet of the external cooling water circulation mechanism, respectively.

[0015] Furthermore, the number of cooling jackets is set to three, the size of the top port of the cooling jacket is adapted to the size of the release groove, the top side wall of the cooling jacket is fixedly connected to an inlet pipe that connects the top of the spiral water channel and the input end of the inner cooling pipe, and the bottom side wall of the cooling jacket is fixedly connected to an outlet pipe that connects the bottom of the spiral water channel and the output pipe.

[0016] Furthermore, the support is composed of a base and three circumferentially arrayed support arms fixedly connected to the top edge of the base, wherein the front side of the base has an opening to expose the bottom port of the input pipe.

[0017] Furthermore, the adjustment assembly includes hydraulic cylinders installed on the left and right sides of the support base portion, with a support ring fixedly connected between the tops of the hydraulic cylinders. The support ring is slidably engaged with the support arm on the support. The bottom outer wall of the input pipe has two guide grooves arranged in a circular array. The inner wall of the support ring is provided with pin protrusions that are slidably engaged with the two guide grooves respectively. The guide grooves are composed of connected inclined grooves and vertical grooves from top to bottom.

[0018] The upper end of the support ring is rotatably connected to a traction ring, and the upper end of the traction ring is fixedly connected to a crystallization platform that is slidably sealed to the inner wall of the cooling jacket.

[0019] Furthermore, a temperature sensor is installed on the upper wall of the inner cavity of the sealing cover, and a pressure sensor is installed on the top of the right support arm on the support, which moves and abuts against the lower wall of the right end of the sealing cover. The pressure sensor provides feedback to control the extension and retraction of the hydraulic cylinder.

[0020] The beneficial effects of this invention are as follows:

[0021] 1. This invention utilizes a locking component to engage a locking ring with a locking block in the crucible. After the sealing cap automatically closes, it can control the uniform pressure applied to all parts of the sealing cap's edge, resulting in a quick and reliable sealing operation. This enhances the sealing performance and improves the purification quality. Furthermore, after sealing, it automatically uses the evacuation port to create a vacuum, making control more convenient.

[0022] 2. By setting up multiple cooling jackets in conjunction with the adjusting components to draw down the crystals, the present invention can greatly reduce the height and volume of the device compared to a single downward channel, thereby improving the applicability of the device in different processing spaces. At the same time, the multiple cooling jackets are circumferentially distributed, which can draw down the crystals synchronously, and the internal flow field of the aluminum liquid is uniform, thus greatly improving the purification rate of high-purity aluminum without affecting the purification quality.

[0023] 3. This invention uses an internal cooling pipe to cool the molten aluminum from the inside during cooling crystallization, while a spiral water channel cools the molten aluminum from the outside, thus forming a double-layer composite cooling system. This improves the cooling effect and achieves uniform cooling of the aluminum ingot from the core to the outer wall, ensuring the stability of directional crystallization and avoiding defects in the aluminum ingot forming process. In addition, when the initial raw material is added, the valve plate blocks and seals the release groove, thereby avoiding damage to the internal cooling pipe caused by the impact of falling raw material and the pressure of accumulation during the addition of raw material, thus ensuring the stability of efficient cooling. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0025] Figure 2 This is a partial three-dimensional sectional view of the present invention;

[0026] Figure 3 This is an exploded three-dimensional sectional view of the sealing cap and locking ring portion of the present invention;

[0027] Figure 4 This is a three-dimensional sectional view of the sealing cap portion of the present invention;

[0028] Figure 5 This is a three-dimensional sectional view of the retaining ring and the pin protrusion of the present invention;

[0029] Figure 6 This is a three-dimensional exploded cross-sectional view of the crucible and valve plate portion of the present invention;

[0030] Figure 7This is a three-dimensional sectional view of the internal cooling pipe and input pipe of the present invention;

[0031] Figure 8 This is a three-dimensional cross-sectional view of the cooling jacket and the drain pipe of the present invention.

[0032] Reference numerals: 1. Support; 11. Pressure sensor; 2. Crucible; 21. Release groove; 22. Electromagnetic heating mechanism; 23. Electromagnetic stirring mechanism; 24. Locking block; 3. Sealing cover; 31. Temperature sensor; 32. Air extraction port; 33. Locking ring; 34. Slot; 35. Worm gear ring; 36. Valve port; 37. U-shaped worm gear; 38. Telescopic cylinder; 4. Valve plate; 41. Cooling jacket; 42. Spiral water channel; 43. Internal cooling pipe; 44. Crystallization stage; 45. Input pipe; 46. Guide groove; 47. Output pipe; 48. Inlet pipe; 49. Drain pipe; 5. Hydraulic cylinder; 51. Support ring; 52. Pin protrusion; 53. Traction ring. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0034] Example 1, as Figures 1-8 As shown, a high-purity aluminum vacuum purification device includes a support 1 and a crucible 2 fixedly connected to the top of the support 1. The lower wall of the crucible 2 has micro-holes that are coaxial with the annular part of the inner cooling pipe 43 and have a diameter smaller than the diameter of the annular part of the inner cooling pipe 43. The bottom circumference of the crucible 2 has several release grooves 21. A heating component is arranged around the crucible 2. A sealing cover 3 is movably hinged to the top of the crucible 2. A suction port 32 is provided at the upper end of the sealing cover 3. The suction port 32 is connected to a suction mechanism. A locking ring 33 is rotatably connected to the bottom of the sealing cover 3. Several slots 34 are arranged around the outer circumference of the locking ring 33. Several locking blocks 24 are fixedly connected to the inner wall of the top of the crucible 2 in a circular array. A locking component that drives the sealing cover 3 to pressurize and close is provided at the right end of the sealing cover 3.

[0035] A valve plate 4 is rotatably sealed at the bottom of the crucible 2. Several cooling sleeves 41, which are misaligned with the release groove 21 and arranged in a circular array, are fixedly inserted into the bottom of the valve plate 4. The top port size of the cooling sleeve 41 is adapted to the size of the release groove 21. A spiral water channel 42 is provided in the wall cavity of the cooling sleeve 41. An inner cooling pipe 43 is fixedly inserted into the inner wall of the top of the cooling sleeve 41. A cooling circulation component is fixedly connected to the center of the bottom of the valve plate 4. An adjustment component is provided at the upper end of the support 1 to drive the valve plate 4 to deflect and draw down the crystals.

[0036] The heating assembly includes an electromagnetic heating mechanism 22 installed around the crucible 2, and an electromagnetic stirring mechanism 23 installed around the electromagnetic heating mechanism 22.

[0037] In use, the sealing cover 3 is opened by the locking component, and the aluminum ingot raw material to be purified is added into the crucible 2. Then, the locking component is controlled to drive the sealing cover 3 to close. After closing, the locking component uses the slot 34 on the locking ring 33 to cooperate with the locking block 24 in the crucible 2 to control the edge of the sealing cover 3 to apply uniform pressure to the upper end of the crucible 2, thereby achieving a tight seal between the sealing cover 3 and the crucible 2. The sealing operation is quick and reliable, which enhances the sealing performance and improves the purification quality. After sealing, the evacuation mechanism automatically uses the evacuation port 32 to evacuate the molten processing area to create a vacuum. At the same time, the top area of ​​the cooling jacket 41 can be evacuated through the micro-holes at the bottom of the crucible 2. After the required vacuum conditions are reached, the electromagnetic heating mechanism 22 is run to heat and melt the aluminum ingot raw material. Then, the electromagnetic stirring mechanism 23 is run to perform electromagnetic stirring. Subsequently, the control and adjustment component drives the valve plate 4 to deflect, and the molten aluminum liquid in the crucible 2 automatically enters the top of the cooling jacket 41. In the inner area, the cooling water circulation in each inner cooling pipe 43 and spiral water channel 42 is controlled to form a double-layer composite cooling of the aluminum liquid, thereby improving the cooling effect and achieving uniform cooling and temperature reduction of the aluminum ingot crystallization from the core to the outer wall. This ensures the stability of directional crystallization and avoids defects in aluminum ingot forming. Since the valve plate 4 blocks and seals the release groove 21 when the initial raw material is put in, it avoids the impact of falling raw material and the damage caused by the accumulation pressure to the inner cooling pipe 43, thereby ensuring the stability of efficient cooling. In addition, multiple cooling jackets 41, together with the adjustment component, guide the crystallizer downward. Compared with a single downward channel, it can greatly reduce the height and volume of the device and improve the applicability of the device in different processing spaces. At the same time, the multiple cooling jackets 41 are circumferentially distributed and can guide the crystallizer downward simultaneously. The internal flow field of the aluminum liquid is uniform, thereby greatly improving the purification rate of high-purity aluminum without affecting the purification quality.

[0038] In embodiment two, based on the above embodiment, the locking component includes a worm gear ring 35 rotatably connected to the lower wall of the sealing cover 3. The inner wall of the worm gear ring 35 is provided with three protrusions arranged in a circumferential array. The outer wall of the locking ring 33 is provided with a groove that can be movably engaged with the protrusions. The right end of the sealing cover 3 is rotatably sealed and connected to a U-shaped worm 37 that meshes with the worm gear ring 35. The bottom of the right end of the sealing cover 3 is provided with a limiting groove corresponding to the U-shaped worm 37. The front and rear ends of the U-shaped worm 37 are movably hinged to the outer wall of the electromagnetic stirring mechanism 23 with telescopic cylinders 38.

[0039] The slot 34 is an inverted L-shape with a locking ring 33 extending through the bottom wall. Corresponding chamfers are provided between the slot 34 and the block 24. The height of the lower wall of the slot 34 is greater than the height of the lower wall of the block 24.

[0040] Initially, the sealing cover 3 is in a horizontally closed state. The retraction of the telescopic cylinders 38 on both sides causes the U-shaped worm gear 37 to deflect. The U-shaped worm gear 37 then engages and causes the worm gear ring 35 to deflect. The worm gear ring 35 uses the protrusions to squeeze the grooves, and the grooves cause the locking ring 33 to deflect. The deflection of the locking ring 33 then squeezes the circumferentially distributed locking blocks 24 into the corresponding locking slots 34, and the sealing cover 3 is locked. The sealing cover 3 is also uniformly squeezed to the upper end of the crucible 2 based on the elastic deformation force, thus achieving a reliable seal.

[0041] When the sealing cover 3 needs to be opened, under vacuum conditions, the sealing cover 3 is pressed against the upper end of the crucible 2. Therefore, the telescopic cylinders 38 on both sides are extended to the initial state, which can stably drive the U-shaped worm gear 37 to deflect and reset. After resetting, the telescopic cylinders 38 are extended further. The telescopic cylinders 38 then indirectly squeeze the limiting groove at the bottom right end of the sealing cover 3 through the U-shaped worm gear 37, causing the sealing cover 3 to flip up. When closing, the telescopic cylinders 38 are contracted, and the sealing cover 3 automatically deflects downward under its own weight.

[0042] In embodiment three, based on the above embodiments, a valve port 36 is provided on the right side of the locking ring 33, which is misaligned with the air extraction port 32.

[0043] Initially, the valve port 36 and the air extraction port 32 are misaligned. When the telescopic cylinder 38 retracts, it drives the U-shaped worm gear 37 to deflect. When the U-shaped worm gear 37 engages and drives the worm gear ring 35 to deflect, the sealing cover 3 is locked. The worm gear ring 35 drives the valve port 36 to connect with the air extraction port 32, and the external suction mechanism automatically draws air, making control convenient.

[0044] In embodiment four, based on the above embodiments, the cooling circulation assembly includes an input pipe 45 fixedly connected to the center of the bottom of the valve plate 4, an L-shaped output pipe 47 fixedly sleeved on the outside of the input pipe 45, an inner cooling pipe 43 in the shape of a hanging ring with the part in the center of the cooling sleeve 41 in a ring shape, the two ends of the inner cooling pipe 43 being connected to the input pipe 45 and the output pipe 47 respectively, the input end of the inner cooling pipe 43 passing through the output pipe 47, and the output pipe 47 and the input pipe 45 respectively corresponding to the inlet and outlet of the external cooling water circulation mechanism.

[0045] The number of cooling jackets 41 is set to three. The top side wall of the cooling jacket 41 is fixedly connected to the inlet pipe 48, which connects the top of the spiral water channel 42 and the input end of the inner cooling pipe 43. The bottom side wall of the cooling jacket 41 is fixedly connected to the outlet pipe 49, which connects the bottom of the spiral water channel 42 and the outlet pipe 47.

[0046] This design ensures that the cooling water temperature in each internal cooling pipe 43 and spiral water channel 42 remains at a relatively low level, and that the cooling effect is the same in similar areas. It achieves uniform cooling and temperature reduction throughout the entire area of ​​aluminum ingot crystallization from the core to the outer wall, ensuring the stability of directional crystallization and avoiding defects in aluminum ingot forming.

[0047] In embodiment five, based on the above embodiments, the support 1 is composed of a base and three circumferentially arrayed support arms fixedly connected to the top edge of the base, wherein the front side of the base has an opening for exposing the bottom port of the input tube 45.

[0048] The crucible 2 is supported by three circularly arrayed arms, which form a three-point support and ensure stability and reliability. It does not obstruct the removal of the aluminum ingots that are subsequently pulled out. The notch design facilitates the fixed installation of the outlet end of the external cooling water circulation mechanism and enables connection to the bottom of the rotating input pipe 45.

[0049] In Example 6, based on the above examples, the adjustment assembly includes hydraulic cylinders 5 installed on the left and right sides of the base portion of the support 1. A support ring 51 is fixedly connected between the tops of the hydraulic cylinders 5. The support ring 51 is slidably engaged with the support arm on the support 1. The bottom outer wall of the input pipe 45 is provided with two guide grooves 46 arranged in a circular array. The inner wall of the support ring 51 is provided with pin protrusions 52 that are slidably engaged with the two guide grooves 46 respectively. The guide grooves 46 are composed of connected inclined grooves and vertical grooves from top to bottom.

[0050] A traction ring 53 is rotatably connected to the upper end of the support ring 51, and a crystallization platform 44 is fixedly connected to the upper end of the traction ring 53 and is slidably sealed to the inner wall of the cooling jacket 41.

[0051] Hydraulic cylinder 5 drives the support ring 51 to descend, and the pin protrusion 52 first squeezes the inclined groove in the guide groove 46, driving the output pipe 47 to rotate the valve plate 4, realizing the docking of the top port of the cooling sleeve 41 with the release groove 21. Simultaneously, the cooling sleeve 41 drives the crystallization stage 44 to deflect the traction ring 53. When the support ring 51 moves down, it drives the traction ring 53 to move the crystallization stage 44 down slightly. The aluminum liquid above the crystallization stage 44 just reaches the cooling and crystallization point. Subsequently, as the hydraulic cylinder 5 continues to contract, the valve plate 4 drives the top port of the cooling sleeve 41 to stably dock with the release groove 21, and the crystallization stage 44 automatically pulls down the high-purity aluminum crystals generated by cooling.

[0052] In Example 7, based on the above examples, a temperature sensor 31 is installed on the upper wall of the inner cavity of the sealing cover 3, and a pressure sensor 11 is installed on the top of the right support arm on the support 1, which movably abuts against the lower right wall of the sealing cover 3. The pressure sensor 11 provides feedback control for the extension and retraction of the hydraulic cylinder 5.

[0053] By continuously monitoring the heating temperature through the temperature sensor 31, the timing of the deflection of the valve plate 4 and the cooling jacket 41 can be controlled, avoiding premature deflection that would cause the raw material to not melt completely and thus forcefully squeeze the inner cooling pipe 43. Through the design of the pressure sensor 11, when the sealing cover 3 is opened and no longer squeezes the pressure sensor 11, the pressure sensor 11 will feed back to control the hydraulic cylinder 5 to extend and reset, driving the valve plate 4 to make the cooling jacket 41 misaligned with the release groove 21, ensuring that the inner cooling pipe 43 is protected when the raw material is replenished.

[0054] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A high-purity aluminum vacuum purification device, comprising a support (1) and a crucible (2) fixedly connected to the top of the support (1), characterized in that, The crucible (2) has several release grooves (21) on its bottom circumference. A heating component is provided around the crucible (2). A sealing cover (3) is hinged to the top of the crucible (2). An air extraction port (32) is provided at the upper end of the sealing cover (3). A locking ring (33) is rotatably connected to the bottom of the sealing cover (3). Several slots (34) are provided around the outer circumference of the locking ring (33). Several locking blocks (24) are fixedly connected to the inner wall of the top of the crucible (2). A locking component is provided at the right end of the sealing cover (3) to pressurize and close the sealing cover (3). The bottom of the crucible (2) is rotatably sealed with a valve plate (4). The bottom of the valve plate (4) is fixedly inserted with several cooling sleeves (41) that are misaligned with the release groove (21) and arranged in a circular array. The wall cavity of the cooling sleeve (41) is provided with a spiral water channel (42). The inner wall of the top of the cooling sleeve (41) is fixedly inserted with an inner cooling pipe (43). The bottom center of the valve plate (4) is fixedly connected with a cooling circulation component. The upper end of the support (1) is provided with an adjustment component that drives the valve plate (4) to deflect and draws down the crystals.

2. The high-purity aluminum vacuum purification device according to claim 1, characterized in that, The heating assembly includes an electromagnetic heating mechanism (22) installed around the crucible (2), and an electromagnetic stirring mechanism (23) is installed around the electromagnetic heating mechanism (22).

3. The high-purity aluminum vacuum purification device according to claim 2, characterized in that, The locking assembly includes a worm gear ring (35) rotatably connected to the lower wall of the sealing cover (3). The inner wall of the worm gear ring (35) is provided with three protrusions arranged in a circumferential array. The outer wall of the locking ring (33) is provided with a groove that engages with the protrusions. The right end of the sealing cover (3) is rotatably sealed and connected to a U-shaped worm (37) that meshes with the worm gear ring (35). The bottom of the right end of the sealing cover (3) is provided with a limiting groove corresponding to the U-shaped worm (37). The front and rear ends of the U-shaped worm (37) are movably hinged to the outer wall of the electromagnetic stirring mechanism (23) with telescopic cylinders (38).

4. The high-purity aluminum vacuum purification device according to claim 3, characterized in that, The slot (34) is an inverted L-shape with a locking ring (33) extending through the bottom wall. Corresponding chamfers are provided between the slot (34) and the block (24). The height of the lower wall of the slot (34) is greater than the height of the lower wall of the block (24).

5. The high-purity aluminum vacuum purification device according to claim 4, characterized in that, The right side of the locking ring (33) is provided with a valve port (36) that is misaligned with the air extraction port (32), and the air extraction port (32) is connected to an external air extraction mechanism.

6. The high-purity aluminum vacuum purification device according to claim 5, characterized in that, The cooling circulation assembly includes an input pipe (45) fixedly connected to the center of the bottom of the valve plate (4). An L-shaped output pipe (47) is fixedly sleeved on the outside of the input pipe (45). The inner cooling pipe (43) is in the shape of a hanging ring and the part in the cooling sleeve (41) is centered in a ring shape. The lower wall of the crucible (2) is provided with micro-holes that are coaxial with the ring-shaped part of the inner cooling pipe (43) and have a diameter smaller than the diameter of the ring-shaped part of the inner cooling pipe (43). The two ends of the inner cooling pipe (43) are respectively connected to the input pipe (45) and the output pipe (47). The input end of the inner cooling pipe (43) passes through the output pipe (47). The output pipe (47) and the input pipe (45) correspond to the inlet and outlet of the external cooling water circulation mechanism, respectively.

7. The high-purity aluminum vacuum purification apparatus according to claim 6, characterized in that, The number of cooling jackets (41) is set to three. The size of the top port of the cooling jacket (41) is adapted to the size of the release groove (21). The top side wall of the cooling jacket (41) is fixedly connected to the inlet pipe (48) that connects the top of the spiral water channel (42) and the input end of the inner cooling pipe (43). The bottom side wall of the cooling jacket (41) is fixedly connected to the outlet pipe (49) that connects the bottom of the spiral water channel (42) and the outlet pipe (47).

8. The high-purity aluminum vacuum purification apparatus according to claim 7, characterized in that, The support (1) is composed of a base and three circumferentially arrayed support arms fixedly connected to the top edge of the base, wherein the base has an opening on the front side to expose the bottom port of the input pipe (45).

9. A high-purity aluminum vacuum purification device according to claim 8, characterized in that, The adjustment assembly includes hydraulic cylinders (5) installed on the left and right sides of the base of the support (1). A support ring (51) is fixedly connected between the tops of the hydraulic cylinders (5). The support ring (51) is slidably engaged with the support arm on the support (1). The bottom outer wall of the input pipe (45) is provided with two guide grooves (46) arranged in a circular array. The inner wall of the support ring (51) is provided with pin protrusions (52) that are slidably engaged with the two guide grooves (46). The guide grooves (46) are composed of connected inclined grooves and vertical grooves from top to bottom. The upper end of the support ring (51) is rotatably connected to a traction ring (53), and the upper end of the traction ring (53) is fixedly connected to a crystallization platform (44) that is slidably sealed to the inner wall of the cooling sleeve (41).

10. A high-purity aluminum vacuum purification apparatus according to claim 9, characterized in that, A temperature sensor (31) is installed on the upper wall of the inner cavity of the sealing cover (3), and a pressure sensor (11) is installed on the top of the right support arm on the support (1) and moves against the lower wall of the right end of the sealing cover (3). The pressure sensor (11) provides feedback control for the extension and retraction of the hydraulic cylinder (5).

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