Crystal separation stripping method and device and high-purity aluminum crystal separation ingot production system and method

Abstract

The invention discloses a crystallization stripping method. The method comprises the following steps: firstly, cooling a crystallization ingot attached to a crystallization shaft; the cooled crystallization ingot is heated in an electromagnetic induction heating mode until the temperature of the crystallization ingot reaches 400-650 DEG C; and separating the heated crystallization ingot from the crystallization shaft. According to the crystallization stripping method, the crystallization ingot and the crystallization shaft can be effectively separated, the production efficiency is improved, and the continuity of the crystallization process is ensured.

Description

Technical Field

[0001] The present invention belongs to the technical field of high-purity aluminum preparation, and specifically relates to a crystallization stripping method, equipment, and a high-purity aluminum crystallization ingot production system and method. Background Art

[0002] Crystallization is a short-process, high-efficiency preparation technology. It is an extension of the application of directional solidification technology in the industrialization process and is particularly suitable for the preparation of electronic-grade high-purity aluminum. At present, crystallization technology is mostly used in foreign companies. Crystallization technology is still in the experimental exploration stage in China and has not yet achieved large-scale production.

[0003] In the process of preparing high-purity aluminum by crystallization, high-purity aluminum liquid continuously condenses and accumulates on the surface of the crystallization axis, and finally forms a crystallization ingot. The crystallization ingot locks the crystallization axis tightly. It is difficult to detach the crystallization ingot from the crystallization axis by mechanical means, and it is easy to damage the crystallization axis. Therefore, whether the crystallization ingot and the crystallization axis can be effectively separated is directly related to the continuity of the crystallization process and the feasibility of the development of crystallization technology. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a crystallization stripping method for the above-mentioned deficiencies in the prior art, which can effectively separate the crystallization ingot and the crystallization axis, improve production efficiency, and ensure the continuity of the crystallization process. The present invention also provides a crystallization stripping device, a high-purity aluminum crystallization ingot production system and method.

[0005] The present invention provides a crystallization and material removal method, comprising the following steps:

[0006] Cooling the crystallization ingot attached to the crystallization axis;

[0007] The cooled crystallization ingot is heated by electromagnetic induction heating until its temperature reaches 400°C-650°C, so that the heated crystallization ingot is separated from the crystallization axis.

[0008] Preferably, the step of heating the cooled crystallization ingot by electromagnetic induction heating until its temperature reaches 400° C.-650° C. so that the heated crystallization ingot is separated from the crystallization axis specifically includes:

[0009] The cooled crystallization ingot is heated by an electromagnetic induction heater until its temperature reaches 500°C-650°C, so that the heated crystallization ingot is separated from the crystallization axis within 8min-15min.

[0010] Preferably, cooling the crystallization ingot attached to the crystallization axis specifically includes: cooling the crystallization ingot attached to the crystallization axis until its temperature drops to 200°C-500°C.

[0011] The present invention also provides a method for producing a high-purity aluminum crystallization ingot, comprising:

[0012] a step of crystallizing an ingot, and

[0013] Stripping step,

[0014] In the stripping step, the crystallization ingot is stripped by the above-mentioned crystallization stripping method.

[0015] Preferably, the step of crystallizing the ingot comprises:

[0016] Insert the crystallization axis into the aluminum liquid at a speed of no more than 30 mm / s to a depth of 0.5-0.9 times the aluminum liquid;

[0017] The flow rate is 5m 3 / min-10m 3 / min cooling medium is used to cool the crystallization axis, and the crystallization axis is rotated in the aluminum liquid at a speed of 200rpm-400rpm;

[0018] Heat the aluminum liquid to 500-750°C and keep it at that temperature for 50-150 minutes until a crystallization ingot is precipitated on the surface of the crystallization axis.

[0019] The present invention also provides a crystallization and stripping device, comprising a cooling device and a stripping device, wherein the cooling device is used to cool the crystallization ingot attached to the crystallization axis, and the stripping device comprises an electromagnetic induction heater, which is used to heat the cooled crystallization ingot to separate it from the crystallization axis.

[0020] Preferably, the crystallization and stripping equipment also includes a first control device, which is electrically connected to the electromagnetic induction heater. A first corresponding relationship is preset in the first control device, and the first corresponding relationship is used to map the correspondence between the stripping time, the output power and the heating temperature. The first control device is used to adjust the output power and the heating temperature of the electromagnetic induction heater according to the preset target stripping time and the first corresponding relationship.

[0021] Preferably, the crystallization and stripping equipment also includes a second control device, which includes a controller, a pressure sensor and an alarm. The electromagnetic induction heater is arranged around a stripping area, and the crystallization ingot to be stripped and attached to the crystallization axis is arranged in the stripping area. The pressure sensor is arranged below the stripping area and is electrically connected to the controller for sending a detachment signal to the controller after sensing that the crystallization ingot has detached from the crystallization axis and fallen off. The controller is electrically connected to the alarm for controlling the alarm to issue an alarm according to the received detachment signal.

[0022] Preferably, the crystallization and stripping equipment also includes a feeding cart, which is arranged below the stripping device. The stripping device also includes a furnace bottom and a support, which can releasably support the furnace bottom. The stripping area is located above the furnace bottom, and the pressure sensor is arranged on the furnace bottom. The controller is also electrically connected to the support, and is used to control the support to release the furnace bottom when receiving a separation signal, so as to lower the furnace bottom with the crystallization ingot onto the feeding cart, thereby transporting it to subsequent processing equipment.

[0023] Preferably, the cooling device comprises a fan and an air supply assembly, wherein the air supply assembly is used to blow air flow toward the crystallization ingot attached to the crystallization axis, and the fan is connected to the air supply assembly to provide air flow for the air supply assembly.

[0024] Preferably, the air supply assembly includes an air supply pipe and an air knife. There are multiple air supply pipes, each of which is arranged circumferentially in a cooling area. The inlet of the air supply pipe is connected to the fan. Each air supply pipe is connected to multiple air knives. The crystallization ingot attached to the crystallization axis to be cooled is arranged in the cooling area.

[0025] Preferably, the crystallization and removal equipment also includes a third control device, the fan includes a normal temperature fan and a refrigeration fan, the normal temperature fan and the refrigeration fan are respectively used to provide a first airflow and a second airflow, the temperature of the second airflow is lower than the temperature of the first airflow, the air supply assembly is connected to the normal temperature fan and the refrigeration fan through a valve body, and the third control device is electrically connected to the valve body, and is used to control the conduction between the valve body and the normal temperature fan or the refrigeration fan.

[0026] Preferably, a second corresponding relationship is preset in the third control device, and the second corresponding relationship is used to map the corresponding relationship between the cooling time and cooling temperature and the fan pressure and fan flow. The third control device is used to control the conduction between the valve body and the normal temperature fan or the refrigeration fan according to the preset target cooling time, target cooling temperature and the second corresponding relationship. The third control device is also used to adjust the fan pressure and fan flow of the normal temperature fan / refrigeration fan according to the acquired target cooling time, target cooling temperature and the second corresponding relationship.

[0027] The present invention also provides a high-purity aluminum crystallization ingot production system, comprising a crystallization shaft, a crystallization furnace, a gantry and the above-mentioned crystallization and stripping equipment, wherein the crystallization furnace stores aluminum liquid, and is used for crystallizing on the crystallization shaft placed in the aluminum liquid to prepare a high-purity aluminum crystallization ingot, the crystallization furnace and the cooling device and the stripping device in the crystallization and stripping equipment are arranged in sequence along a set direction, the gantry is arranged above the crystallization furnace, the cooling device and the stripping device, and is used for clamping the crystallization shaft and transporting the crystallization shaft between the crystallization furnace, the cooling device and the stripping device along the set direction.

[0028] The crystallization stripping method provided by the present invention, during the stripping process, first cools the crystallization ingot attached to the crystallization axis, and then heats the cooled crystallization ingot attached to the crystallization axis. The crystallization ingot expands after being heated, so that the temperature difference between the part of the crystallization axis that locks the crystallization axis and the crystallization axis causes a gap between the two, thereby causing the crystallization ingot to separate from the crystallization axis. Compared with the mechanical method, this crystallization stripping process is not only simpler, but also does not damage the crystallization axis. Therefore, while improving the crystallization production efficiency, it also prolongs the service life of equipment components and ensures the continuity of the crystallization process.

[0029] The present invention adopts electromagnetic induction heating. Compared with traditional heating methods such as resistance and radiation heaters, the electromagnetic induction heating method uses the principle of electromagnetic induction to generate a high-frequency alternating electromagnetic field, which causes the molecules inside the crystallization ingot to produce frictional movement and directly generate heat, thereby avoiding energy losses such as heat loss and heat conduction. Therefore, the heating efficiency is extremely high, and the temperature of 400℃-650℃ can be quickly reached, thereby effectively realizing the separation of the crystallization ingot from the crystallization axis, and the separation process can be completed quickly, further improving the crystallization production efficiency. At the same time, it is precisely because of the reduced energy loss that the electromagnetic induction heater consumes less energy under the same heating requirements, and is more environmentally friendly and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic structural diagram of a high-purity aluminum crystallization ingot production system in Example 4 of the present invention;

[0031] Figure 2 It is a schematic diagram of a first corresponding relationship table of the electromagnetic induction heater of the crystallization and dematerialization equipment in Example 3 of the present invention;

[0032] Figure 3 It is a schematic diagram of the second corresponding relationship table of the fan of the crystallization and dematerialization equipment in Example 3 of the present invention.

[0033] In the figure: 1. cooling device; 11. air supply assembly; 111. air supply pipe; 112. air knife; 12. normal temperature fan; 13. cooling fan; 131. air compressor; 132. vortex refrigerator; 14. valve body; 15. cooling area; 16. cooling chamber; 161. exhaust port; 17. soundproof cover; 2. stripping device; 21. electromagnetic induction heater; 22. stripping area; 23. furnace bottom; 231. contoured support seat; 24. supporter; 25. furnace wall; 251. thermal insulation lining; 26. thermal insulation furnace cover; 3. crystallization shaft; 31. rotating motor; 32. air inlet; 33.

[0034] Gas outlet; 34. Thermometer; 35. Lifting ear; 4. Crystallization ingot; 5. Control device; 51. Pressure sensor; 52. Warning device; 6. Feeding trolley; 61. Track; 7. Crystallization furnace; 71. Graphite crucible; 72. Heating cover; 73. Liquid aluminum; 8. Gantry; 81. Manipulator; 811. Gripper; 82. Support foot; 83. Guide rail; 84. Horizontal transmission motor; 85. Vertical lifting motor. DETAILED DESCRIPTION

[0035] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of the present invention.

[0036] In the description of the present invention, it should be noted that the terms "upper", "lower" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience and simplification of the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present invention.

[0037] In the description of the present invention, the terms “first”, “second” and “third” are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connect", "set", "install", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0039] Example 1

[0040] The crystallization and stripping method provided in this embodiment can use the equipment in Example 3, and the method specifically includes the following steps:

[0041] Cooling the crystallization ingot 4 attached to the crystallization axis 3;

[0042] The cooled crystallization ingot 4 is heated by electromagnetic induction heating until its temperature reaches 400° C. to 650° C., so that the heated crystallization ingot 4 is separated from the crystallization axis 3 .

[0043] In the crystallization stripping method of this embodiment, during the stripping process, the crystallization ingot attached to the crystallization axis is first cooled, and then the cooled crystallization ingot attached to the crystallization axis is heated. The crystallization ingot expands after being heated, so that the temperature difference between the part of the crystallization axis that locks the crystallization axis and the crystallization axis causes a gap between the two, thereby causing the crystallization ingot to separate from the crystallization axis. Compared with the mechanical method, this crystallization stripping process is not only simpler, but also does not damage the crystallization axis. Therefore, while improving the crystallization production efficiency, it also extends the service life of equipment components and ensures the continuity of the crystallization process.

[0044] In the present embodiment, the crystallization axis 3 is made of graphite material. The present embodiment adopts a material removal method of first cooling and then heating, which makes full use of the difference in thermal expansion coefficients between the crystallization ingot 4 and the crystallization axis 3 at different temperatures. The crystallization ingot 4 can be cooled to change from a high temperature state to a lower process temperature, and the thermal expansion coefficient becomes smaller accordingly. The volume of the crystallization ingot 4 shrinks, thereby increasing the compressive stress of the crystallization ingot 4 on the crystallization axis 3, while the thermal expansion coefficient of the crystallization axis 3 made of graphite is very small at different process temperatures; then, the crystallization ingot 4 is caused to change from a low temperature state to a high temperature state by heating, and the thermal expansion coefficient increases and the volume expands. Since the thermal expansion coefficient of the crystallization axis 3 at different temperatures is very small, the compressive stress of the crystallization ingot 4 on the crystallization axis 3 continues to decrease during the continuous heating process, and under the action of the self-weight of the crystallization ingot 4, the crystallization ingot 4 is separated from the crystallization axis 3.

[0045] Compared with traditional heating methods such as resistance and radiation heaters, the electromagnetic induction heating method uses the principle of electromagnetic induction to generate a high-frequency alternating electromagnetic field, which causes the molecules inside the crystallization ingot to produce frictional movement and directly generate heat, thereby avoiding energy loss such as heat loss and heat conduction. The heating efficiency is extremely high, and the temperature of 400°C-650°C can be quickly reached, thereby effectively realizing the separation of the crystallization ingot 4 from the crystallization axis 3, and the separation process can be completed quickly, further improving the crystallization production efficiency. At the same time, it is precisely because of the reduced energy loss that the electromagnetic induction heater consumes less energy under the same heating requirements, and is more environmentally friendly and reliable.

[0046] In this embodiment, the cooled crystallization ingot 4 is heated by electromagnetic induction heating until its temperature reaches 400° C.-650° C., so that the heated crystallization ingot 4 is separated from the crystallization axis 3, which specifically includes:

[0047] The cooled crystallization ingot 4 is heated by an electromagnetic induction heater 21 until its temperature reaches 500° C. to 650° C., so that the heated crystallization ingot 4 is separated from the crystallization axis 3 within 8 min to 15 min.

[0048] Specifically, the output power of the electromagnetic induction heater 21 is 100KW-200KW, and the heating temperature is 400°C-650°C. Further preferably, the output power of the electromagnetic induction heater 21 is 130KW-170KW, specifically including 130, 140, 150, 160, 170KW, so that the heating temperature reaches 500°C-650°C, specifically including 500, 550, 600, 650°C.

[0049] In this embodiment, the crystallization ingot 4 attached to the crystallization axis 3 is cooled, specifically including: cooling the crystallization ingot 4 attached to the crystallization axis 3 until its temperature drops to 200°C-500°C (target cooling temperature), and more preferably, the target cooling temperature is 250°C-350°C, specifically including 250°C, 270°C, 290°C, 310°C, 330°C, and 350°C. Combined with the equipment in Example 3, when in normal temperature mode, the fan flow rate is 200m 3 / h-600m 3 / h, fan pressure 300mbar-700mbar. Further preferably, fan flow 300m 3 / h-550m 3 / h, including 300, 350, 400, 450, 500, 550m3 / h; fan pressure 400mbar-600mbar, including 400, 450, 500, 550, 600mbar;

[0050] In cooling mode, the fan pressure is 0.3MPa-0.7MPa and the fan flow rate is 200m 3 / h-500m 3 / h; further preferably, the fan pressure is 0.45MPa-0.65MPa, specifically including 0.45, 0.5, 0.55, 0.6, 0.65MPa; the fan flow rate is 240m 3 / h-420m 3 / h, including 240, 270, 300, 330, 360, 390, 420m 3 / h.

[0051] Example 2

[0052] The high purity aluminum crystallization ingot production method of this embodiment can adopt the high purity aluminum crystallization ingot production system in embodiment 4, and the method includes: a precipitation step of the crystallization ingot 4, and a stripping step. In the stripping step, the crystallization stripping method in embodiment 1 is adopted to strip the crystallization ingot.

[0053] In this embodiment, the step of crystallizing the ingot 4 includes:

[0054] Insert the crystallization shaft 3 into the aluminum liquid 73 at a speed not greater than 30 mm / s to a depth of 0.5-0.9 times that of the aluminum liquid 7;

[0055] The crystallization axis 3 is cooled by a cooling medium having a temperature of 20°C to 40°C and a flow rate of 5m3 / min to 10m3 / min, and the crystallization axis 3 is rotated in the aluminum liquid 73 at a speed of 200rpm to 400rpm;

[0056] The aluminum liquid 73 is heated to 500° C.-750° C. and maintained for 50 min-150 min until a crystallization ingot 4 is precipitated on the surface of the crystallization axis 3 .

[0057] Combined with the production system in Example 4, the specific steps of this method are as follows:

[0058] (1) The gantry 8 transports the crystallization shaft 3 to the crystallization furnace 7, inserts the crystallization shaft 3 into the aluminum liquid 73 in the crystallization furnace 7, heats the crystallization furnace 7, and rotates the crystallization shaft 3 until a crystallization ingot 4 is precipitated on the surface of the crystallization shaft 3;

[0059] Specifically, the manipulator 81 of the gantry 8 transfers the crystallization axis 3 with cooling and rotating functions to the top of the crystallization furnace 7, and slowly inserts it into the aluminum liquid 73 in the graphite crucible 71 of the crystallization furnace 7 at a set speed to a set depth, starts the cooling and rotating functions of the crystallization axis 3, starts the heating cover 72 for heating, maintains the process time, and finally obtains a nearly "U"-shaped crystallization ingot 4 precipitated along the surface of the crystallization axis 3. In this embodiment, the crystallization axis 3 needs to be pretreated before crystallization, and the pretreatment process is to spray BN or Al2O3 on its surface, and place the sprayed crystallization axis 3 in an environment of 300℃-500℃ for drying for 10min-30min.

[0060] Among them, the set speed is ≤30mm / s, including: 30, 25, 20, 15, 10, 5mm / s;

[0061] The depth is set to 0.5-0.9 times the depth of the aluminum liquid, including 0.5, 0.6, 0.7, 0.8, and 0.9 times the depth of the aluminum liquid;

[0062] The cooling medium of the crystallization shaft 3 is compressed air, the temperature is 20℃-40℃, specifically including 20, 25, 30, 35, 40℃; the air pressure is 0.3MPa-0.8MPa, specifically including 0.3, 0.4, 0.5, 0.6, 0.7, 0.8MPa; the flow rate is 5m3 / min-10m3 / min, specifically including 5, 6, 7, 8, 9, 10m3 / min;

[0063] The rotation speed of the crystallization axis 3 is 200rpm-400rpm, specifically including 200, 250, 300, 350, 400rpm;

[0064] The heating temperature of the heating cover 72 is 500°C-750°C; more preferably, the heating temperature is 600°C-670°C, specifically including 600, 610, 620, 630, 640, 650, 660, 670°C;

[0065] The process time is 50 min-150 min; more preferably, the process time is 60 min-120 min, specifically including 60, 70, 80, 90, 100, 110, and 120 min.

[0066] (2) After the crystallization ingot 4 is precipitated on the surface of the crystallization shaft 3, the gantry 8 transports the crystallization shaft 3 with the crystallization ingot 4 to the cooling device 1, so that the cooling device 1 cools the crystallization ingot 4 to the target cooling temperature;

[0067] Specifically, the high-temperature "U"-shaped crystallization ingot 4 is transferred from the crystallization furnace 7 to the cooling device 1 by the gantry 8 manipulator 81, and the normal temperature mode of the high-pressure fan or the refrigeration mode of the air compressor 131 is selected. The normal temperature gas generated by the high-pressure fan or the low-temperature gas generated by the air compressor 131 enters the wind knife 112 through the air supply pipe 111, and the cooling gas blown out by the wind knife 112 acts on the surface of the high-temperature crystallization ingot 4, and is finally discharged from the cooling chamber 16 through the exhaust port 161, thereby realizing circulating air cooling and cooling the high-temperature crystallization ingot 4 to the target cooling temperature.

[0068] Among them, in normal temperature mode, the fan flow rate is 200m 3 / h-600m 3 / h, fan pressure 300mbar-700mbar. Further preferably, fan flow 300m 3 / h-550m 3 / h, including 300, 350, 400, 450, 500, 550m3 / h; fan pressure 400mbar-600mbar, including 400, 450, 500, 550, 600mbar;

[0069] In cooling mode, the fan pressure is 0.3MPa-0.7MPa and the fan flow rate is 200m 3 / h-500m 3 / h; further preferably, the fan pressure is 0.45MPa-0.65MPa, specifically including 0.45, 0.5, 0.55, 0.6, 0.65MPa; the fan flow rate is 240m 3 / h-420m 3 / h, including 240, 270, 300, 330, 360, 390, 420m 3 / h;

[0070] The target cooling temperature is 200°C-500°C; further preferably, the target cooling temperature is 250°C-350°C, specifically including 250°C, 270°C, 290°C, 310°C, 330°C, and 350°C.

[0071] (3) After the crystallization ingot 4 is cooled to the target cooling temperature, the gantry 8 transports the crystallization shaft 3 with the crystallization ingot 4 to the stripping device 2, so that the stripping device 2 heats the crystallization ingot 4 until it is separated from the crystallization shaft 3.

[0072] Specifically, the crystallization ingot 4 is suspended in the stripping device 2 by using the manipulator 81 of the gantry 8, and the electromagnetic induction heater 21 is started to quickly heat the crystallization ingot 4, so that the crystallization ingot 4 is quickly separated from the crystallization shaft 3, and falls to the contoured support seat 231 and triggers the pressure sensor 51. At this time, the alarm 52 prompts that the stripping is completed, the support device 24 is opened, and the crystallization ingot 4 is transported away by the feeding cart 6.

[0073] Among them, the output power of the electromagnetic induction heater 1 is 100KW-200KW, and the heating temperature is 400℃-650℃. More preferably, the output power is 130KW-170KW, specifically including 130, 140, 150, 160, 170KW; the heating temperature is 500-650℃, specifically including 500, 550, 600, 650℃. In this embodiment, the heating temperature mentioned above refers to the temperature reached by heating the crystallization ingot 4 / aluminum liquid 73, and the cooling temperature refers to the temperature reached by cooling the crystallization ingot 4.

[0074] Example 3

[0075] like Figure 1 As shown, the crystallization and dematerialing equipment of this embodiment can be used to execute the method in Example 1. The equipment includes a cooling device 1 and a dematerialing device 2. The cooling device 1 is used to cool the crystallization ingot 4 attached to the crystallization axis 3. The dematerialing device 2 includes an electromagnetic induction heater 21, which is used to heat the cooled crystallization ingot 4 to separate it from the crystallization axis 3.

[0076] In the process of removing materials, the crystallization removal equipment of this embodiment first uses the cooling device 1 to cool the crystallization ingot 4 attached to the crystallization shaft 3, and then heats the cooled crystallization ingot 4 attached to the crystallization shaft 3. After the crystallization ingot 4 is heated, it will expand, so that the temperature difference between the part of the crystallization shaft 3 and the crystallization shaft 3 causes a gap between the two, thereby causing the crystallization ingot 4 to separate from the crystallization shaft 3. Compared with the mechanical method, this crystallization removal process is not only simpler, but also will not damage the crystallization shaft 3. Therefore, while improving the crystallization production efficiency, it also prolongs the service life of equipment components and ensures the continuity of the crystallization process.

[0077] In the present embodiment, the crystallization axis 3 is made of graphite material. The present embodiment adopts a material removal method of first cooling and then heating, which makes full use of the difference in thermal expansion coefficients between the crystallization ingot 4 and the crystallization axis 3 at different temperatures. The crystallization ingot 4 can be cooled to change from a high temperature state to a lower process temperature, and the thermal expansion coefficient becomes smaller accordingly. The volume of the crystallization ingot 4 shrinks, thereby increasing the compressive stress of the crystallization ingot 4 on the crystallization axis 3, while the thermal expansion coefficient of the crystallization axis 3 made of graphite is very small at different process temperatures; then, the crystallization ingot 4 is caused to change from a low temperature state to a high temperature state by heating, and the thermal expansion coefficient increases and the volume expands. Since the thermal expansion coefficient of the crystallization axis 3 at different temperatures is very small, the compressive stress of the crystallization ingot 4 on the crystallization axis 3 continues to decrease during the continuous heating process, and under the action of the self-weight of the crystallization ingot 4, the crystallization ingot 4 is separated from the crystallization axis 3.

[0078] This embodiment uses an electromagnetic induction heater 21 as a heating component. Compared with traditional heating methods such as resistance and radiation heaters, the electromagnetic induction heater 21 uses the principle of electromagnetic induction to generate a high-frequency alternating electromagnetic field, so that the molecules inside the crystallization ingot 4 produce friction movement and directly generate heat, thereby avoiding energy loss such as heat loss and heat conduction. Therefore, the heating efficiency is extremely high, further improving the crystallization production efficiency. At the same time, it is precisely because of the reduction in energy loss that under the same heating requirements, the electromagnetic induction heater 21 consumes less energy and is more environmentally friendly and reliable.

[0079] The inventors have found through research that the output power and heating temperature of the electromagnetic induction heater 21 affect the expansion of the crystallization ingot 4, that is, it is related to the time for the crystallization ingot 4 to separate from the crystallization axis 3. Therefore, by adjusting the output of the electromagnetic induction heater 21, the time required for the crystallization ingot 4 to separate can be adjusted. In this embodiment, this relationship (i.e., the following first corresponding relationship) is organized into a table, as shown in FIG. Figure 2 As shown ( Figure 2 The values ​​in the table are only simple examples of the present embodiment. The specific values ​​may vary due to factors such as the crystallization material, the size of the material removal space, the layout of the electromagnetic induction heater 21, etc., and need to be specifically measured).

[0080] The crystallization and stripping equipment also includes a first control device, which is electrically connected to the electromagnetic induction heater 21. A first corresponding relationship is preset in the first control device, and the first corresponding relationship is used to map the corresponding relationship between the stripping time, the output power and the heating temperature. The first control device is used to adjust the output power and the heating temperature of the electromagnetic induction heater 21 according to the preset target stripping time and the first corresponding relationship, so that the crystallization ingot 4 can complete the stripping within the target stripping time. Among them, the target stripping time is the estimated stripping time planned according to the production rhythm of the production system, etc., which can be manually input into the first control device, and can also be sent to the first control device by an external master control center. In this embodiment, the heating temperature described in the context refers to the temperature reached by heating the crystallization ingot 4, and the cooling temperature refers to the temperature reached by cooling the crystallization ingot 4.

[0081] In this embodiment, when selecting the output power and heating temperature, the basis is: stripping efficiency is given priority, and stripping energy consumption is second. For example: efficiency is given priority in the full production state, high power and high temperature heating are selected to achieve rapid stripping, thereby improving efficiency; under non-full production conditions, low power and sub-high temperature heating are selected to reduce stripping energy consumption. Therefore, the first control device is also used to select the output power and heating temperature scheme with the fastest stripping time (such as 170KW and 650℃) when the preset current working state of the equipment is the full production state according to the preset target stripping time (for example, stripping is required to be less than 16min) and the first corresponding relationship. When the preset current working state of the equipment is the non-full production state, the stripping time meets the requirements and the output power and heating temperature are the smallest (such as 130KW and 500℃). The current working state of the equipment can be manually input into the first control device, or it can be sent to the first control device by an external master control center.

[0082] In this embodiment, the crystallization and dematerialization equipment also includes a second control device, which includes a controller, a pressure sensor 51 and an alarm 52. The electromagnetic induction heater 21 is arranged around a dematerialization area 22. After the crystallization ingot 4 is cooled, the crystallization ingot 4 to be dematerialized and attached to the crystallization axis 3 is arranged in the dematerialization area 22, and the electromagnetic induction heater 21 surrounding the periphery of the dematerialization area 22 can heat it.

[0083] In this embodiment, the electromagnetic induction heater 21 is an electromagnetic induction coil, arranged along a spiral line, the axis of the spiral line is coaxial with the crystallization axis 3 arranged in the stripping area 22, the radius of the electromagnetic induction coil is not less than 1.05 times the maximum radius of the crystallization ingot 4, and the height of the electromagnetic induction coil is not less than 0.5 times the height of the crystallization ingot 4. The radius of the electromagnetic induction coil can be further optimized, including 1.05, 1.1, 1.15, 1.2, 1.25, 1.3, 1.35, 1.4, 1.45, 1.5×the maximum radius of the crystallization ingot 4; the height of the electromagnetic induction coil can be further optimized, including 0.5, 0.6, 0.7, 0.8×the height of the crystallization ingot 4.

[0084] The pressure sensor 51 is arranged below the stripping area 22. When the crystallization ingot 4 separates from the crystallization axis 3 and falls, it will press the pressure sensor 51 below, thereby triggering the pressure sensor 51. The pressure sensor 51 is electrically connected to the controller, and is used to send a separation signal to the controller after sensing that the crystallization ingot 4 separates from the crystallization axis 3 and falls. The controller is electrically connected to the alarm 52, and is used to control the alarm 52 to issue an alarm according to the received separation signal. In this embodiment, the alarm 52 is an audible and visual alarm, which can emit sound and display light to promptly remind the staff. In other embodiments, other alarm methods can also be selected.

[0085] In this embodiment, the crystallization stripping equipment also includes a feeding trolley 6, which is arranged below the stripping device 2 and moves along a track 61. The stripping device 2 is a cylindrical stripping furnace as a whole, and the stripping device 2 also includes a furnace wall 25, an insulating furnace cover 26, a furnace bottom 23 and a support 24, and the support 24 can release and support the furnace bottom 23. Under normal conditions, the furnace bottom 23 is blocked at the bottom opening of the furnace wall 25 under the support of the support 24, and the insulating furnace cover 26 is a split structure, which can be opened and closed to block the top opening of the furnace wall 25. The inner side of the furnace wall 25 is also provided with an insulating lining 251, and the insulating lining 251 and the insulating furnace cover 26 together prevent heat loss during the heating process.

[0086] A contour support seat 231 is also provided on the upper surface of the furnace bottom 23. The contour support seat 231 is a concave structure adapted to the bottom of the crystallization ingot 4, so that the crystallization ingot 4 can be more stable after falling. The material removal area 22 is located above the furnace bottom 23, that is, located inside the furnace cavity surrounded by the furnace wall 25, the heat-insulating furnace cover 26, and the furnace bottom 23. The pressure sensor 51 is arranged on the furnace bottom 23 and embedded in the middle position of the bottom of the contour support seat 231 to ensure that the pressure caused by the crystallization ingot 4 after falling can be sensed.

[0087] The controller is also electrically connected to the holder 24, and is used to control the holder 24 to release the furnace bottom 23 when receiving the disengagement signal, so as to lower the furnace bottom 23 with the crystallization ingot 4 onto the feeding car 6, and then transport it to the subsequent processing equipment along the track 61. This setting method can further improve the automation level of the equipment, realize automatic transfer after material removal, and ensure the continuity of production. In this embodiment, the holder 24 includes a rotary drive member and a pallet. The driving end of the rotary drive member is connected to the pallet, and the rotation is controlled by the controller. Under normal conditions, the pallet is arranged in a horizontal direction, so that the lower surface of the furnace bottom 23 is supported by the upper surface. When it needs to be lowered, the rotary drive member drives the pallet to a vertical state, thereby releasing the furnace bottom 23.

[0088] The feeding trolley 6 is a trolley with a lifting table, which can be Figure 1 The scissor-type structure shown realizes lifting. When the feeding cart 6 reaches the bottom of the stripping device 2, the tabletop rises, thereby shortening the travel height when the furnace bottom 23 descends. After receiving the furnace bottom 23 with the crystallization ingot 4, the tabletop descends, and then moves after descending to avoid interference between the crystallization ingot 4 and the stripping device 2. A pressure-sensitive sensor and a position sensor can be further provided on the feeding cart 6, and the controller is electrically connected to the two, so that when the position sensor senses that the feeding cart 6 has arrived under the stripping device 2, the tabletop of the feeding cart 6 is controlled to rise, and after the pressure-sensitive sensor is touched by the furnace bottom 23 with the crystallization ingot 4, the tabletop of the feeding cart 6 is controlled to descend.

[0089] In this embodiment, the cooling device 1 includes a fan and an air supply component 11, the air supply component 11 is used to blow airflow to the crystallization ingot 4 attached to the crystallization shaft 3, and the fan is connected to the air supply component 11 to provide airflow for the air supply component 11. That is, the crystallization ingot is cooled by air cooling. Compared with the traditional room temperature cooling method, air cooling has higher efficiency and can achieve rapid cooling. Compared with the conventional spray cooling method, air cooling does not generate a large amount of water vapor, so it can prevent water vapor from entering the crystallization shaft 3 and the cooling component, resulting in a shortened service life of the crystallization shaft 3 and the cooling component.

[0090] In this embodiment, the crystallization and removal equipment also includes a third control device, and the fan includes a normal temperature fan 12 and a refrigeration fan 13. The normal temperature fan 12 and the refrigeration fan 13 are respectively used to provide a first airflow and a second airflow. The temperature of the second airflow is lower than the temperature of the first airflow, that is, the normal temperature fan 12 can provide an airflow with a relatively high temperature, and this air cooling mode can be called a normal temperature mode. The refrigeration fan 13 can provide an airflow with a relatively low temperature, and this air cooling mode can be called a refrigeration mode.

[0091] The air supply assembly 11 is connected to the normal temperature fan 12 and the refrigeration fan 13 through the valve body 14. The third control device is electrically connected to the valve body 14, and is used to control the conduction between the valve body 14 and the normal temperature fan 12 or the refrigeration fan 13, so that the air cooling can be switched between the normal temperature mode and the refrigeration mode to suit different cooling conditions.

[0092] Similarly, the inventors have found that the fan pressure and fan flow rate output by the fan will affect the cooling of the crystallization ingot 4, that is, they are related to the cooling time and final cooling temperature of the crystallization ingot 4. Therefore, the cooling of the crystallization ingot 4 can be adjusted by adjusting the output of the fan. In this embodiment, this relationship (i.e., the following second corresponding relationship) is organized into a table, as shown in FIG. Figure 3 As shown ( Figure 3 The values ​​in the table are only simple examples of the present embodiment. The specific values ​​may vary due to factors such as the crystallization material, the size of the cooling space, the layout of the air supply component 11, etc., and need to be specifically measured).

[0093] In this embodiment, a second correspondence is preset in the third control device, and the second correspondence is used to map the correspondence between the cooling time and the cooling temperature and the fan pressure and the fan flow rate. The third control device is used to control the valve body 14 to be connected with the normal temperature fan 12 or the refrigeration fan 13 according to the preset target cooling time, target cooling temperature and the second correspondence. The third control device is also used to adjust the fan pressure and fan flow rate of the normal temperature fan 12 / refrigeration fan 13 according to the acquired target cooling time, target cooling temperature and the second correspondence. Among them, the target cooling time and the target cooling temperature are numerical values ​​planned according to the production rhythm of the production system, etc., which can be manually input into the third control device, or sent to the third control device by an external master control center, etc.

[0094] In this embodiment, similarly, when selecting the mode, pressure and flow rate, the basis is: cooling efficiency is prioritized, and cooling energy consumption is secondary. For example: efficiency is prioritized under full production conditions, and high pressure and large flow rate in the refrigeration mode are selected to achieve rapid cooling, thereby improving efficiency; under non-full production conditions, low pressure and small flow rate in the normal temperature mode are selected to reduce energy consumption. Therefore, the third control device is also used to select the refrigeration mode (the valve body 14 is connected to the refrigeration fan 13) according to the preset target cooling time and target cooling temperature (for example, cooling to 350°C in less than 40 minutes) and the second corresponding relationship, when the preset current working state of the equipment is the full production state, and select the flow rate and pressure solution with the fastest cooling time (such as 0.6MPa and 360m 3 / h); when the current working state of the preset equipment is not full production, select the normal temperature mode (the valve body 14 is connected to the normal temperature fan 12), and select the solution with the lowest energy consumption while meeting the cooling time requirements (such as 300mbar and 500m 3 / h). The current working state of the equipment can be manually input into the third control device, or sent to the third control device by an external master control center.

[0095] In this embodiment, the functions of the first control device, the second control device and the third control device can be implemented by the same control device, that is, the control device 5. In other embodiments, the functions of the three can also be implemented by different control devices respectively.

[0096] In this embodiment, the cooling device 1 also includes a cooling chamber 16 and a soundproof cover 17. The soundproof cover 17 is a double-door structure, which can be opened and closed at the top opening of the cooling chamber 16. An exhaust port 161 is also provided at the top of the cooling chamber 16, so as to discharge the airflow, and form an air-cooled circulation system together with the fan and the air supply component 11. The air supply component 11 and the fan are both arranged inside the cooling chamber 16. The air supply component 11 includes an air supply pipe 111 and an air knife 112. There are multiple air supply pipes 111, and each air supply pipe 111 is arranged around a cooling area 15. The cooling area 15 is located inside the cooling chamber 16. The inlet of the air supply pipe 111 is connected to the fan, and each air supply pipe 111 is connected to a plurality of air knives 112. The crystallization ingot 4 attached to the crystallization axis 3 to be cooled is arranged in the cooling area 15.

[0097] In this embodiment, the inlet of each air supply pipe 111 is connected to the valve body 14, each air supply pipe 111 is arranged in the vertical direction, and the distance from the center of the cooling area 15 is equal. There are at least four groups of wind knives 112, each group includes a wind knife 112 arranged at the same height on each air supply pipe 111, that is, the wind knives 112 are evenly distributed around the center of the cooling area 15 by group, and each group of wind knives 112 is arranged vertically along the air supply pipe 111, and the wind sweeping interval of the wind knife 112 is not less than 0.5 times the height of the crystallization ingot 4. The number of groups of wind knives 112 is further preferably 4, 5, 6, 7, and 8; the wind sweeping interval is further preferably 0.5, 0.6, 0.7, 0.8, 0.9, and 1× the height of the crystallization ingot 4.

[0098] In this embodiment, the normal temperature fan 12 uses a high pressure fan, the cooling fan 13 uses an air compressor 131 and a vortex refrigerator 132, and the cooling mode is to cool the compressed air of the air compressor 131 through the vortex refrigerator 132. The wind knife 112 is connected to the cooling interface of the high pressure fan and the vortex refrigerator 132 through the air supply pipe 111, and the valve body 14 uses a temperature control valve, and the normal temperature mode cooling or the cooling mode cooling is selected through the temperature control valve.

[0099] The crystallization and stripping equipment of this embodiment can solve the problem that the crystallization ingot 4 is difficult to disengage from the crystallization shaft 3. While opening up the crystallization process, it improves production efficiency and the life of the crystallization shaft 3 and reduces production costs. It can be used in the field of metal purification, especially in the production process of high-purity aluminum, and simultaneously improves the continuous operation capacity and automation level of high-purity aluminum crystallization purification.

[0100] Example 4

[0101] The high-purity aluminum crystallization ingot production system of this embodiment can be used to implement the production method in Example 2, such as Figure 1 As shown, the system includes a crystallization shaft 3, a crystallization furnace 7, a gantry 8 and the crystallization and stripping equipment in Example 3. The crystallization furnace 7 stores aluminum liquid 73 for crystallizing and preparing a high-purity aluminum crystallization ingot 4 on the crystallization shaft 3 placed in the aluminum liquid 73. The crystallization furnace 7 and the cooling device 1 and the stripping device 2 in the crystallization and stripping equipment are arranged in sequence along a set direction. The gantry 8 is arranged above the crystallization furnace 7, the cooling device 1 and the stripping device 2, and is used to clamp the crystallization shaft 3 and transport the crystallization shaft 3 between the crystallization furnace 7, the cooling device 1 and the stripping device 2 along the set direction.

[0102] In this embodiment, the shaft body of the crystallization shaft 3 is rotatably connected to the top hanging ear 35, and rotates under the drive of the rotating motor 31. An empty interlayer is provided in the shaft body for airflow to circulate inside the shaft body, and an air inlet 32 ​​and an air outlet 33 are provided at the top of the shaft body. The air inlet 32 ​​and the air outlet 33 are both connected to the interlayer for cooling the shaft body by airflow. A temperature meter 34 is also provided at the bottom of the shaft body for measuring the temperature of the shaft body.

[0103] In this embodiment, a graphite crucible 71 is provided inside the crystallization furnace 7, and the graphite crucible 71 is used to store aluminum liquid 73. The crystallization furnace 7 includes a heating cover 72, which is a double-door structure and can be opened and closed to be connected to the top opening of the crystallization furnace 7. The heating cover 72 has the function of heating the inside of the crystallization furnace 7, which is specifically achieved by a thermal radiation heater arranged on the lower end surface of the heating cover 72. During the crystallization process, the crystallization shaft 3 itself cools and rotates, and the heating cover 72 heats the furnace. The heating cover 72, the soundproof cover 17, and the heat-insulating furnace cover 26 all adopt a double-door structure, which can facilitate the entry and exit of the crystallization shaft 3.

[0104] In this embodiment, the bottom of the gantry 8 is provided with a support leg 82 for supporting the frame. The gantry 8 grabs and fixes the crystallization shaft 3 through a manipulator 81. The manipulator 81 is driven by a horizontal transmission motor 84 to move along a guide rail 83 on the frame, thereby realizing transportation. The manipulator is driven by a vertical lifting motor 85 to lift and lower in the vertical direction, thereby driving the crystallization shaft 3 to lift and lower. A clamping claw 811 is provided at the bottom of the manipulator 81, and the clamping claw 811 is adapted to the ear 35 provided on the top of the crystallization shaft 3, so as to be connected when grabbing.

[0105] The production process of the whole system is as follows: (1) crystallization, the manipulator 81 of the gantry 8 transfers the crystallization shaft 3 to the crystallization furnace 7 to prepare the crystallization ingot 4; (2) cooling, the crystallization shaft 3 and the crystallization ingot 4 are transferred to the cooling device 1 together for uniform and rapid cooling; (3) stripping, the cooled crystallization shaft 3 and the crystallization ingot 4 are suspended in the stripping device 2 to complete the separation of the crystallization shaft 3 and the crystallization ingot 4. The production system proposed in this embodiment effectively solves the problem that the crystallization ingot 3 and the crystallization shaft 4 are difficult to separate, which not only improves the crystallization efficiency and the service life of the crystallization shaft 3, reduces the production cost, but also effectively improves the continuous operation capacity and automation level of high-purity aluminum crystallization purification.

[0106] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A crystallization stripping method, characterized in that: The following steps are involved: Cooling the crystallization ingot (4) attached to the crystallization shaft (3); The cooled crystallization ingot (4) is heated by electromagnetic induction heating until its temperature reaches 400° C.-650° C., so that the heated crystallization ingot (4) is separated from the crystallization axis (3).

2. The crystallization stripping method according to claim 1, characterized in that: The method of heating the cooled crystallization ingot (4) by electromagnetic induction heating until its temperature reaches 400° C. to 650° C. so that the heated crystallization ingot (4) is separated from the crystallization axis (3) specifically includes: The cooled crystallization ingot (4) is heated by an electromagnetic induction heater (21) until its temperature reaches 500°C-650°C, so that the heated crystallization ingot (4) is separated from the crystallization axis (3) within 8 minutes-15 minutes.

3. The crystallization stripping method according to claim 1, characterized in that: The step of cooling the crystallization ingot (4) attached to the crystallization axis (3) specifically comprises: The crystallization ingot (4) attached to the crystallization axis (3) is cooled until its temperature drops to 200°C to 500°C.

4. A method for producing a high-purity aluminum crystallization ingot, characterized in that: include: a step of crystallizing an ingot (4), and Stripping step, In the stripping step, the crystallization ingot (4) is stripped using the crystallization stripping method according to any one of claims 1 to 3.

5. The method for producing a high-purity aluminum crystallization ingot according to claim 4, characterized in that: The step of precipitating the crystallization ingot (4) comprises: Inserting the crystallization axis (3) into the aluminum liquid (73) at a speed of no more than 30 mm / s to a depth of 0.5 to 0.9 times that of the aluminum liquid (7); The flow rate is 5m 3 / min-10m 3 / min cooling medium to cool the crystallization shaft (3), and make the crystallization shaft (3) rotate at a speed of 200rpm-400rpm in the aluminum liquid (73); The aluminum liquid (73) is heated to 500°C-750°C and maintained at this temperature for 50min-150min until a crystallization ingot (4) is precipitated on the surface of the crystallization axis (3).

6. A crystallization and stripping device, characterized in that: It comprises a cooling device (1) and a stripping device (2), The cooling device (1) is used to cool a crystallization ingot (4) attached to a crystallization shaft (3). The stripping device (2) comprises an electromagnetic induction heater (21) for heating the cooled crystallization ingot (4) so ​​as to separate it from the crystallization axis (3).

7. The crystallization and stripping equipment according to claim 6, characterized in that: It also includes a first control device, the first control device is electrically connected to the electromagnetic induction heater (21), A first corresponding relationship is preset in the first control device, and the first corresponding relationship is used to map the corresponding relationship among the stripping time, the output power and the heating temperature. The first control device is used to adjust the output power and the heating temperature of the electromagnetic induction heater (21) according to the preset target stripping time and the first corresponding relationship.

8. The crystallization and stripping equipment according to claim 6, characterized in that: The device further comprises a second control device, wherein the second control device comprises a controller, a pressure sensor (51) and an alarm (52). The electromagnetic induction heater (21) is arranged around a material removal area (22), and the crystallization ingot (4) attached to the crystallization shaft (3) to be removed is arranged in the material removal area (22). The pressure sensor (51) is arranged below the stripping area (22) and is electrically connected to the controller, and is used to send a separation signal to the controller after sensing that the crystallization ingot (4) separates from the crystallization shaft (3) and falls off. The controller is electrically connected to the alarm device (52) and is used to control the alarm device (52) to issue an alarm according to the received separation signal.

9. The crystallization and stripping equipment according to claim 8, characterized in that: It also includes a feeding vehicle (6), which is arranged below the stripping device (2). The stripping device (2) further comprises a furnace bottom (23) and a supporter (24), wherein the supporter (24) can be released to support the furnace bottom (23). The stripping area (22) is located above the furnace bottom (23), and the pressure sensor (51) is arranged on the furnace bottom (23). The controller is also electrically connected to the support (24) and is used to control the support (24) to release the furnace bottom (23) when receiving a separation signal, so as to lower the furnace bottom (23) with the crystallization ingot (4) onto the feeding vehicle (6) for transporting to subsequent processing equipment.

10. The crystallization and stripping equipment according to claim 6, characterized in that: The cooling device (1) comprises a fan and an air supply component (11), The air supply assembly (11) is used to blow air toward the crystallization ingot (4) attached to the crystallization shaft (3). The fan is connected to the air supply component (11) and is used to provide air flow for the air supply component (11).

11. The crystallization and removal equipment according to claim 10, characterized in that: The air supply assembly (11) comprises an air supply pipe (111) and an air knife (112). There are a plurality of air supply pipes (111), each of which is arranged in a circumferential direction of a cooling area (15), and the inlet of the air supply pipe (111) is connected to a fan. Each air supply pipe (111) is connected to a plurality of air knives (112). The crystallization ingot (4) attached to the crystallization axis (3) to be cooled is arranged in a cooling area (15).

12. The crystallization and removal equipment according to claim 10, characterized in that: Also includes a third control device, The fan comprises a normal temperature fan (12) and a refrigeration fan (13), wherein the normal temperature fan (12) and the refrigeration fan (13) are respectively used to provide a first airflow and a second airflow, wherein the temperature of the second airflow is lower than the temperature of the first airflow. The air supply assembly (11) is connected to the normal temperature fan (12) and the refrigeration fan (13) via a valve body (14). The third control device is electrically connected to the valve body (14) and is used to control the conduction between the valve body (14) and the normal temperature fan (12) or the refrigeration fan (13).

13. The crystallization and stripping equipment according to claim 12, characterized in that: The third control device has a preset second corresponding relationship, which is used to map the corresponding relationship between the cooling time and the cooling temperature and the fan pressure and the fan flow rate. The third control device is used to control the valve body (14) to be connected to the normal temperature fan (12) or the refrigeration fan (13) according to the acquired target cooling time, target cooling temperature and the second corresponding relationship, The third control device is also used to adjust the fan pressure and fan flow of the normal temperature fan (12) / refrigeration fan (13) according to the preset target cooling time, target cooling temperature and the second corresponding relationship.

14. A high-purity aluminum crystallization ingot production system, characterized in that: It comprises a crystallization shaft (3), a crystallization furnace (7), a gantry (8) and the crystallization and removal equipment according to any one of claims 6 to 13, The crystallization furnace (7) stores aluminum liquid (73), and the crystallization furnace (7) is used to crystallize on a crystallization shaft (3) placed in the aluminum liquid (73) to prepare a high-purity aluminum crystallization ingot (4). The crystallization furnace (7) and the cooling device (1) and the stripping device (2) in the crystallization stripping equipment are arranged in sequence along a set direction. The gantry (8) is arranged above the crystallization furnace (7), the cooling device (1) and the stripping device (2), and is used to clamp the crystallization shaft (3) and transport the crystallization shaft (3) between the crystallization furnace (7), the cooling device (1) and the stripping device (2) along a set direction.

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