A device and method for cutting down a segregated aluminum ingot

Abstract

The application discloses a kind of segregation aluminium ingot's discharging device and method, belong to metal purification technical field.The discharging device includes segregation furnace, cooling chamber, baking furnace, discharging mechanism, segregation rotor and truss manipulator;Among them: truss manipulator controls segregation rotor to extend into the preparation segregation aluminium ingot of segregation furnace body;Segregation aluminium ingot is moved into cooling chamber and is uniformly cooled, then is moved into baking furnace and is baked, finally using discharging mechanism makes segregation aluminium ingot and segregation rotor separate.The device and method proposed in the application effectively solve the problem that segregation ingot and segregation rotor are difficult to separate, significantly improve production efficiency, prolong the service life of segregation shaft sleeve, reduce the cost of consumables, while realizing the continuous discharging of segregation aluminium ingot, improve the automation level of segregation discharging.

Description

Technical Field

[0001] This invention relates to the field of metal refining technology, specifically to a feeding device and method for segregated aluminum ingots. Background Technology

[0002] Segregation was industrialized in France and Germany in the 1970s, and Japan developed highly specialized segregation equipment and processes in the 1980s. Currently, there are several valuable technologies for purifying aluminum by utilizing the segregation phenomenon during alloy solidification.

[0003] Cooling tube segregation refers to the process of inserting a cooling tube into molten aluminum, and then circulating a cooling medium through the tube to create a temperature gradient between the cooling tube and the molten aluminum, thereby promoting the continuous solidification and deposition of the molten aluminum into the tube. During segregation, the temperature gradient at the solid-liquid interface of the molten aluminum can be influenced by controlling the temperature and flow rate of the cooling medium, thus controlling the segregation rate.

[0004] Patent CN201910150571.6 discloses a method for purifying and crystallizing ultra-high purity aluminum. The method involves immersing a crystallization device in 3N-5N molten aluminum, rotating the device, and introducing room-temperature air to promote the solidification and accumulation of the molten aluminum at the lower end of the device. When half of the crystals have formed, the device is removed, rotation is stopped, and the lower end of the device and the crystals are rapidly cooled in air to 280℃-320℃. The device is then reinserted under the surface of the molten aluminum and rotation continues until no more crystals can be formed. The crystals are then removed. However, no practical and effective method for removing the crystals is provided.

[0005] Patent 201910921203.7 discloses a mobile crystallization device and a metal purification system, which proposes a material-removing mechanism for separating metal ingots from crystallization tubes. Since the metal ingots will seize the crystallization tubes during the solidification and cooling process, mechanical separation is prone to causing the crystallization tubes to break, which poses a great risk of tooling damage and operational safety hazards.

[0006] Patent 202011398319.6 discloses a method for crystallizing high-purity electronic-grade aluminum. The method involves inserting a crystallization device into a graphite crucible, allowing the graphite sleeve at the lower end of the crystallization device to extend into the molten aluminum, activating a crystallization rotation device to drive the graphite sleeve to rotate synchronously, and introducing compressed air into the graphite sleeve. After the set crystallization time is reached, the crystals are lifted out of the crucible, and the crystals on the graphite sleeve below the crystallizer are removed. However, this method does not propose a practical and effective method for removing the crystals.

[0007] During crystallization, metal solidifies on the surface of the crystallization tube and continuously accumulates to form a crystallized ingot. The crystallized ingot and the crystallization tube are very firmly bonded, and it is difficult to separate them using conventional mechanical methods. Therefore, whether the metal ingot and the crystallization tube can be effectively separated is related to the continuity and technical feasibility of the cooling tube segregation process. Summary of the Invention

[0008] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a feeding device and method for segregated aluminum ingots, which can solve the problems of difficulty in separating segregated ingots from segregation shafts or the breakage of segregation shafts during the separation process, and realize continuous and automated feeding of segregated ingots.

[0009] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0010] A feeding device for segregated aluminum ingots includes a segregation furnace, a cooling chamber, a baking furnace, a feeding mechanism, a segregation rotor, and a gantry robot; the specific structures of each part are as follows:

[0011] Segregation furnace: includes a segregation furnace body, a graphite crucible, and a heat-insulating furnace cover I; the graphite crucible is located inside the furnace body, and the heat-insulating furnace cover I is located at the top of the furnace body; the segregation rotor extends into the segregation furnace body through the heat-insulating furnace cover I to prepare high-purity aluminum ingots by segregation; the heat-insulating furnace cover I is a two-part split furnace cover, designed to be recessed, and the center of the heat-insulating furnace cover I has a through hole, the diameter of which meets the requirements for the internal rotation of the segregation rotor.

[0012] Cooling Chamber: Used for uniform cooling of aluminum ingots, including a cooling cavity, a spray mechanism, a ventilation system, and a sealing cover; the spray mechanism includes several rotating nozzles that spray pure water onto the aluminum ingots inside the cooling cavity to cool them; the ventilation system includes a ventilation fan and an exhaust port, through which gas inside the cooling cavity passes through the exhaust port and an exhaust channel on the side wall of the cooling cavity to the ventilation fan, and then is discharged outside the cooling cavity; the sealing cover is located at the top of the cooling cavity and has a through hole for the segregation rotor to extend into; the spray mechanism also includes a spray pump, cooling water pipes, and a filter screen; the cooling water pipes are arranged symmetrically in an even number of vertical positions along the cylindrical cooling cavity; the rotating nozzles are connected to a universal joint base and can rotate in any direction within a 120° range. In the ventilation system, the exhaust port is located on the upper part of the inner wall of the cooling cavity, and the ventilation fan is embedded in the bottom surface of the cooling cavity.

[0013] Baking oven: includes oven body, heat-insulating oven cover II, open oven bottom and oven bottom locking mechanism; the open oven bottom is fixed to the bottom of the oven body or separated from it by the oven bottom locking mechanism; the heat-insulating oven cover II is located on the top of the oven body; the oven bottom locking mechanism can seal and lock the open oven bottom to the bottom end face of the oven side wall, and separate it from the oven when the open oven bottom needs to be moved away.

[0014] The feeding mechanism includes a diversion valve, a guide sleeve, a column, a top head, and a spindle surface temperature sensor. The diversion valve is located at the top of the column, and the top head is located at the bottom of the column. The lower part of the column extends into the baking oven through the heat preservation furnace cover II, and a guide sleeve is provided on the heat preservation furnace cover II to guide the column so that the axis of the column is parallel to the axis of the segregation rotor. The spindle surface temperature sensor is built into the top head and is used to detect the surface temperature of the segregated spindle.

[0015] Segregation rotor: includes a rotary motor, cooling pipe, segregation bushing, and spindle core temperature sensor; the rotary motor drives the cooling pipe mandrel to rotate, and drives the segregation bushing outside the mandrel to rotate synchronously, the segregation bushing being connected to the top of the cooling pipe; the spindle core temperature sensor is built into the segregation bushing and is used to detect the temperature of the segregated spindle core. The cooling pipe of the segregation rotor is also provided with an air inlet and an exhaust outlet; the top of the cooling pipe is provided with a lifting lug for hoisting the segregation rotor; when the segregation rotor is moved into the baking oven for unloading, the gantry robot arm is moved away, and the lifting lug is clamped and fixed by a fixed clamp (lifting lug locking mechanism) to prevent excessive loading force during unloading from damaging the gantry robot arm.

[0016] Gantry robot: used for lifting, translating and assembling the segregation rotor in the segregation furnace, cooling chamber and baking oven.

[0017] The truss manipulator moves horizontally on the truss guide rail, which is located directly above the segregation furnace, cooling chamber, and baking furnace. Truss limiting devices are installed at both ends of the truss guide rail. The movement of the truss manipulator along the truss guide rail is driven by a transmission motor, and the lifting action of the truss manipulator is driven by a lifting motor. The gripper at the lower end of the truss manipulator can hold the lifting lug at the top of the segregation rotor.

[0018] The feeding device also includes a lifting material trolley. When it is necessary to receive segregated aluminum ingots, the trolley is raised to support the open furnace bottom of the baking furnace. After the open furnace bottom receives the segregated aluminum ingots, the trolley is lowered and drives the open furnace bottom to move away.

[0019] The method for feeding segregated aluminum ingots using the feeding device includes sequential processes of aluminum ingot segregation, segregated ingot cooling, and segregated ingot baking. The aluminum ingot segregation refers to inserting a segregation rotor with rotation and cooling functions under the molten aluminum in the segregation furnace for a certain period of time, during which the molten aluminum continuously crystallizes and precipitates around the surface of the segregation rotor, eventually forming a "bell-shaped" segregated aluminum ingot. The segregated ingot cooling refers to transferring the high-temperature segregated aluminum ingot from the segregation furnace to a cooling chamber for spray cooling. The segregated ingot baking refers to transferring the cooled segregated aluminum ingot from the cooling chamber to a baking furnace for heating, and then applying a demolding force parallel to the axis of the segregation rotor through the feeding mechanism to remove the segregated aluminum ingot from the segregation rotor.

[0020] During the aluminum ingot segregation process, the temperature of the molten aluminum is 680-700℃, the segregation rotor speed is 250-300rpm, and the temperature of the cooling gas introduced into the cooling pipe is 20-30℃ with a flow rate of 500-800NL / min; preferably, the temperature of the molten aluminum is 685-690℃, the speed of the segregation rotor is preferably 280-290rpm, the temperature of the cooling gas is preferably 25-30℃, and the flow rate is preferably 600-700NL / min.

[0021] During the cooling process of the segregated ingot, the spray cooling medium is pure water with a resistivity of 18.2 MΩ·cm and a water pressure of 50-150 N; before spray cooling, the ventilation fan is started with a wind speed ≤1 m / s; the segregated aluminum ingot is cooled to 150-200℃ (ingot core temperature).

[0022] During the baking and feeding process of the segregated ingot, the baking heating temperature is automatically controlled in segments: when the ingot surface temperature is ≤600℃, the heating temperature is ≥700℃; when the ingot surface temperature is >600℃, the heating temperature is 600℃≤660℃; the corresponding baking time is the time required for the ingot core temperature to reach above 450℃.

[0023] When removing segregated aluminum ingots through the feeding mechanism, the rated load applied is 10-50KN, and the loading is carried out at a uniform speed of 10-50N / s.

[0024] The beneficial effects of this invention are as follows:

[0025] Compared with existing technologies, this method utilizes the difference in thermal expansion coefficients between heterogeneous materials. By first cooling and then heating the segregated aluminum ingot, the interfacial bonding force between the ingot and the segregated bushing is reduced, making it easier for the ingot to separate from the segregated rotor. A demolding force parallel to the rotor's axis is applied by the feeding mechanism to detach the ingot from the rotor. The proposed device and method effectively solve the problem of difficult separation between the segregated ingot and the rotor, significantly improving production efficiency, extending the service life of the segregated bushing, reducing consumable costs, and simultaneously enabling continuous feeding of the segregated aluminum ingot, thus improving the automation level of segregation feeding operations. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the aluminum ingot feeding device.

[0027] Figure 2 This is a schematic diagram of the segregation furnace structure.

[0028] Figure 3 This is a schematic diagram of the cooling chamber and the gantry robot structure.

[0029] Figure 4 This is a schematic diagram of the baking oven and the feeding mechanism.

[0030] Figure 5This is a schematic diagram of the material lifting trolley structure.

[0031] In the diagram: 1-Truss column; 2-Truss guide rail; 3-Truss limiter; 4-Truss robot; 5-Lifting motor; 6-Transmission motor; 7-Gripper; 8-Trolley track; 9-Segregation furnace body; 10-Graphite crucible; 11-Molten aluminum; 12-Insulation furnace cover I; 13-Segregation rotor; 14-Rotating motor; 15-Air inlet; 16-Exhaust outlet; 17-Cooling pipe; 18-Segregation bushing; 19-Ingot core temperature sensor; 20-Lifting lug; 21-Segregated aluminum ingot; 2 2-Cooling chamber; 23-Sealing cover; 24-Pure water; 25-Spray pump; 26-Spray pipe; 27-Rotating nozzle; 28-Filter screen; 29-Ventilation fan; 30-Exhaust vent; 31-Baking oven body; 32-Insulation oven cover II; 33-Open furnace bottom; 34-Ingot support; 35-Furnace bottom locking mechanism; 36-Lifting lug locking mechanism; 37-Discharging mechanism; 38-Guide sleeve; 39-Top head; 40-Diverter valve; 41-Column; 42-Lifting material trolley. Detailed Implementation

[0032] The present invention will now be described in detail and specifically through specific embodiments to provide a better understanding of the invention. These embodiments are based on the technical solution of the present invention and provide detailed implementation methods and operating procedures; however, the scope of protection of the present invention is not limited to the following embodiments.

[0033] This invention provides a feeding device and method for segregated aluminum ingots. The feeding device includes a segregation furnace, a cooling chamber, a baking furnace, a feeding mechanism, a segregation rotor, and a gantry robot. The segregation rotor can operate independently in multiple locations, including the segregation furnace, cooling chamber, baking furnace, and feeding mechanism, via the gantry robot. Utilizing the difference in thermal expansion coefficients between materials, the feeding device first cools and then heats the segregated aluminum ingot to reduce the interfacial bonding force between the ingot and the segregation bushing. Then, a demolding force parallel to the axis of the segregation rotor is applied, causing the ingot to detach from the rotor, achieving continuous feeding of the segregated aluminum ingot and improving the automation level of segregation feeding.

[0034] Example 1

[0035] This embodiment is a preferred feeding device for segregated aluminum ingots, such as... Figure 1 As shown. The feeding device includes: a segregation furnace, a cooling chamber, a baking oven, a feeding mechanism, a segregation rotor, and a gantry robot; the segregation rotor can operate independently in multiple devices such as the segregation furnace, cooling chamber, and baking oven via the gantry robot.

[0036] like Figure 2 As shown, the segregation furnace includes a segregation furnace body 9, a graphite crucible 10, and a heat-insulating furnace cover I12. The graphite crucible 10 is disposed inside the furnace body 9, and the heat-insulating furnace cover I12 is provided at the upper end of the furnace body 9.

[0037] The heat preservation furnace cover 12 adopts a two-lobed opening and closing, sinking structure. The heat preservation furnace cover 12 has a through hole in the center, and the diameter of the through hole meets the requirements for the internal rotation of the segregation rotor 13.

[0038] The furnace cover is also equipped with a protective gas inlet and an aluminum liquid temperature measuring hole.

[0039] like Figure 3 As shown, the cooling chamber includes a cooling cavity 22, a spray mechanism, an exhaust system (ventilation system), and a sealing cover 23. The bottom of the cooling cavity 22 is filled with pure water 24 to a certain height, and a filter screen 28 is placed above the pure water. The spray mechanism is located inside the cooling cavity 22, and the sealing cover 23 is located at the upper end of the cooling cavity 22.

[0040] The spraying mechanism includes a spray pump 25, a cooling water pipe 26, a rotating nozzle 27, and a filter screen 28; the spray pump 25 is located at the bottom of the cooling chamber 22, and pure water covers the spray pump; the spray pump 25 is connected to the cooling water pipe 26.

[0041] The cooling water pipes 26 are an even number and are fixed along the axial direction of the cylindrical cooling cavity 22 on the inner wall of the cooling cavity 22. The cooling water pipes 26 are arranged symmetrically on the inner wall of the cooling cavity 22. The number of cooling water pipes 26 is preferably ≥6, such as 6, 8, 10, 12, 14, 16, 18, or 20.

[0042] Each cooling water pipe 26 is equipped with multiple rotating nozzles 27, which are connected to a universal joint base and can rotate in any direction within a 120° range. Pure water at the bottom of the cooling chamber 22 is sprayed onto the aluminum ingot sample by a spray pump and rotating nozzles 27 to cool it; after falling, the pure water is filtered by a filter screen 28 and returns to the bottom of the cooling chamber, realizing continuous cyclic spraying.

[0043] The ventilation system (exhaust system) includes a ventilation fan 29 and an exhaust outlet 30, with a wind speed ≤1m / s. The ventilation fan 29 is embedded in the bottom surface of the cooling chamber 22 and is connected to the exhaust outlet 30 through an exhaust duct (exhaust shaft) embedded in the inner wall of the cooling chamber. The exhaust outlet is located on the upper part of the inner wall of the cooling chamber. The gas inside the cooling chamber 22 is discharged from the exhaust outlet, through the exhaust duct, to the ventilation fan, and then to the outside of the cooling chamber.

[0044] like Figure 4As shown, the baking oven includes an oven body 31, an insulated oven cover II 32, an open oven bottom 33, and an oven bottom locking mechanism 35. The open oven bottom 33 is fixed to the bottom of the oven body 31 or separated from it by the oven bottom locking mechanism 35. The insulated oven cover II 32 is located on the top of the oven body. The oven bottom locking mechanism 35 can seal and lock the open oven bottom to the bottom surface of the oven side wall, and can be separated from the oven when the open oven bottom needs to be moved. The specific structure of the oven bottom locking mechanism 35 is not limited, as long as it can achieve the requirement of sealing and locking the oven bottom to the bottom surface of the oven and being able to be moved.

[0045] like Figure 4 As shown, the feeding mechanism includes a diversion valve 40, a guide sleeve 38, a column 41, a top head 39, and a spindle temperature sensor; the diversion valve is located at the top of the column 41, and the top head is located at the bottom of the column; the lower part of the column extends into the baking oven 31 through the heat preservation furnace cover II 32, and the guide sleeve 38 is fixed to the upper surface of the heat preservation furnace cover II 32 so that the axis of the column is parallel to the axis of the segregation rotor;

[0046] The flow divider valve 40 can evenly distribute the feeding load to the mandrel 39 acting on the segregated aluminum ingot 21 under the action of the hydraulic system; the mandrel 39 is used to apply the feeding load to the end face of the segregated ingot 21.

[0047] The ingot surface temperature sensor 42 is built into the top head 39 to measure the temperature of the outer surface of the segregated ingot.

[0048] like Figure 2 As shown, the segregation rotor includes: a rotary motor 14, a cooling pipe 17, a segregation bushing 18, and a spindle core temperature sensor 19. The rotary motor drives the cooling pipe mandrel to rotate, and drives the segregation bushing outside the mandrel to rotate synchronously. The segregation bushing is connected to the top end of the cooling pipe. The spindle core temperature sensor 19 is built into the segregation bushing and is used to detect the temperature of the segregated spindle core. The cooling pipe of the segregation rotor is also provided with an air inlet 15 and an exhaust outlet 16. The top end of the cooling pipe is provided with a lifting lug 20 for hoisting the segregation rotor. When the segregation rotor is moved into the baking oven for unloading, the gantry robot arm is moved away, and the lifting lug 20 is clamped and fixed by a fixing fixture (lifting lug locking mechanism 36) to prevent excessive loading force from damaging the gantry robot arm during unloading.

[0049] The truss manipulator 4 is used to lift the segregation rotor and perform lifting and translating movements within the segregation furnace, cooling chamber, and baking oven. The truss manipulator translates along the truss guide rail 2, which is located directly above the segregation furnace, cooling chamber, and baking oven, and is supported by truss columns 1. Truss limiting devices 3 are installed at both ends of the truss guide rail to limit the movement of the truss manipulator 4. The movement of the truss manipulator along the truss guide rail is driven by a transmission motor 6, and the lifting movement of the truss manipulator is driven by a lifting motor 5. The gripper 7 at the lower end of the truss manipulator can hold the lifting lug at the top of the segregation rotor.

[0050] The feeding device also includes a lifting material trolley 42, such as Figure 5 As shown, when it is necessary to receive segregated aluminum ingots, the trolley is raised to support the open furnace bottom of the baking furnace. After the open furnace bottom receives the segregated aluminum ingots, the trolley is lowered and drives the open furnace bottom to move away along the trolley track 8.

[0051] Example 2

[0052] This embodiment presents a preferred method for feeding segregated aluminum ingots, such as... Figure 1 As shown, the feeding process includes: aluminum ingot segregation, segregated ingot cooling, and segregated ingot baking and feeding. The specific operation steps are as follows:

[0053] I. Segregation of aluminum ingots:

[0054] S1. The preheated segregation rotor 13 is transferred to the top of the segregation furnace 9 by the gantry robot 4, and the segregation rotor 13 is inserted into the aluminum liquid 11 of the segregation furnace by the lifting motor 5 of the gantry robot.

[0055] The preheating temperature of the segregated rotor 13 is 500℃; the preheating time is 15min.

[0056] The temperature of the aluminum melt 11 in the segregation furnace is 690℃;

[0057] The segregation furnace 13 has a heat preservation furnace cover I 12 on top. The heat preservation furnace cover I adopts a two-lobed opening and closing design with a central through hole. The segregation rotor 13 extends into the aluminum liquid 11 of the segregation furnace through the central through hole.

[0058] S2. Start the segregation rotor 13, introduce cooling gas into the cooling pipe 17, and introduce protective gas into the segregation furnace 9.

[0059] The rotary motor 14 used to drive the segregated rotor 13 has a speed of 280 rpm;

[0060] The cooling gas temperature is 30°C and the flow rate is 550 NL / min;

[0061] The protective gas is nitrogen or argon, with a flow rate of 5 NL / min.

[0062] S3. After the segregation rotor rotates for a certain period of time, stop the rotation of the segregation rotor 13 and shut off the cooling gas and protective gas. Segregation is completed, and a segregated aluminum ingot is formed around the segregation rotor.

[0063] Preferably, the segregation time is 60-90 min, such as 60, 65, 70, 75, 80, 85, or 90 min.

[0064] II. Cooling of Segregated Ingots:

[0065] S4. Open the insulation cover Ⅰ12 of the segregation furnace, and use the gantry robot 4 to lift the segregation rotor 13 together with the segregation ingot 21 at the lower end from the segregation furnace 9 to the cooling chamber 22. Close the sealing cover 23, and start the spray pump 25 and the ventilation fan 29 for spray cooling.

[0066] Preferably, the sealing cap 23 prevents water splashing and moisture leakage;

[0067] Preferably, the spray pump 25 has a spray water pressure of 70N;

[0068] Preferably, the ventilation fan 29 has a wind speed of 0.3 m / s;

[0069] Preferably, the spray cooling is achieved by the spray pump 25 pumping pure water 24 from the bottom of the cooling chamber and spraying it onto the surface of the segregated ingot 21 through the rotating nozzle 27 to achieve uniform cooling.

[0070] Preferably, the pure water 24 is sprayed onto the surface of the segregated ingot 21 by the spray pump 25, spray pipe 26, and rotating nozzle 27, and then purified by the filter screen 28 before flowing back into the water storage tank at the bottom of the cooling chamber.

[0071] Further preferably, the filter screen has a filtration accuracy (mesh size) of 30-50μm.

[0072] S5. Cool the segregated ingot 21 to a certain temperature, turn off the spray pump 25 and the ventilation fan 29, and the cooling is complete.

[0073] Preferably, the cooling temperature refers to a core temperature of 180°C.

[0074] Preferably, the cooling temperature is detected by the spindle core temperature sensor 19, with a measurement accuracy of ≤ ±0.5℃.

[0075] III. Baking and feeding of segregated ingots:

[0076] S6. Open the sealing cover, and use the gantry robot 4 to lift the segregation rotor 13 along with the segregation ingot 21 at its lower end from the cooling chamber 22 to the baking oven 31. Close the baking oven insulation cover II 32, start the baking heating, and heat at the set temperature for a certain time. Use the unloading mechanism 37 to apply a demolding force parallel to the axis of the segregation rotor 13 to separate the segregation aluminum ingot 21 from the segregation rotor 13. The segregation aluminum ingot 21 falls into the ingot holder 34 placed on the furnace bottom 33. The open furnace bottom 33 is fixed to the bottom of the baking oven by the furnace bottom locking mechanism 35.

[0077] Preferably, the baking temperature is 700°C, and the ingot surface temperature reaches 500°C before feeding begins;

[0078] Preferably, the feeding mechanism 37 is integrated into the oven insulation cover 32;

[0079] Preferably, the demolding force is 20 kN;

[0080] Preferably, the feeding mechanism 37 applies load through the diversion valve 40, the column 41 supports and transmits the load, and the top head 39 directly acts on the end face of the segregated ingot to achieve the separation of the segregated ingot 21 from the segregated rotor.

[0081] In a further preferred embodiment, the number of the top heads 39 is four, which are evenly distributed around the axis of the segregated rotor 13 with equal radii and equal central angles, and are located on the same horizontal plane;

[0082] In a further preferred embodiment, the diversion valve 40 is loaded at a uniform speed of 30 N / s until the segregated ingot falls off.

[0083] S7. The lifting material trolley 42 moves to the bottom of the baking oven 31, the lifting material trolley rises and supports the open furnace bottom 33, the furnace bottom locking mechanism 35 opens, the material trolley 43 descends and carries away the segregated ingot 21; after unloading, the material trolley 43, together with the furnace bottom locking mechanism 35, places the open furnace bottom 33 back at the bottom of the baking oven 31.

Claims

1. A feeding device for segregated aluminum ingots, characterized in that: The feeding device includes a segregation furnace, a cooling chamber, a baking furnace, a feeding mechanism, a segregation rotor, and a gantry robot; wherein: Segregation furnace: includes a segregation furnace body, a graphite crucible, and a heat-insulating furnace cover I; the graphite crucible is located inside the furnace body, and the heat-insulating furnace cover I is located at the top of the furnace body; the segregation rotor extends into the segregation furnace body through the heat-insulating furnace cover I to prepare high-purity aluminum ingots by segregation method; Cooling chamber: Used for uniform cooling of aluminum ingots, including a cooling cavity, a spraying mechanism, a ventilation system, and a sealing cover; the spraying mechanism includes several rotating nozzles that spray pure water onto the aluminum ingots in the cooling cavity to cool them; the ventilation system includes a ventilation fan and an exhaust port, through which gas in the cooling cavity passes through the exhaust port and the exhaust channel on the side wall of the cooling cavity to the ventilation fan, and then is discharged outside the cooling cavity; the sealing cover is located at the top of the cooling cavity, and the sealing cover has a through hole for the segregation rotor to extend into; Baking oven: includes oven body, heat-insulating oven cover II, open oven bottom and oven bottom locking mechanism; the open oven bottom is fixed to the bottom of the oven body or separated from it by the oven bottom locking mechanism; the heat-insulating oven cover II is located on the top of the oven body; The feeding mechanism includes a diversion valve, a guide sleeve, a column, a top head, and a spindle surface temperature sensor. The diversion valve is located at the top of the column, and the top head is located at the bottom of the column. The lower part of the column extends into the baking oven through the heat preservation furnace cover II, and a guide sleeve is provided on the heat preservation furnace cover II to guide the column so that the axis of the column is parallel to the axis of the segregation rotor. The spindle surface temperature sensor is built into the top head and is used to detect the surface temperature of the segregated spindle. Segregation rotor: includes a rotary motor, a cooling tube, a segregation bushing, and a spindle core temperature sensor; the rotary motor drives the cooling tube mandrel to rotate, and drives the segregation bushing outside the mandrel to rotate synchronously, the segregation bushing being connected to the top end of the cooling tube; the spindle core temperature sensor is built into the segregation bushing and is used to detect the temperature of the segregated spindle core. Gantry robot: used for lifting, jacking and translating the segregation rotor in the segregation furnace, cooling chamber and baking furnace; The feeding device first cools and then heats the segregated aluminum ingot, utilizing the difference in thermal expansion coefficients between the heterogeneous materials to reduce the interfacial bonding force between the segregated ingot and the segregated bushing, making it easier for the segregated aluminum ingot to separate from the segregated rotor. The segregated ingot is then removed from the segregated rotor by applying a demolding force parallel to the axis of the segregated rotor through the feeding mechanism.

2. The feeding device for segregated aluminum ingots according to claim 1, characterized in that: The heat preservation furnace cover I is a two-part split furnace cover, and it is designed to be sunken. The center of the heat preservation furnace cover I has a through hole, and the diameter of the through hole meets the requirements for the internal rotation of the segregation rotor.

3. The feeding device for segregated aluminum ingots according to claim 1, characterized in that: The spraying mechanism also includes a spray pump, cooling water pipes, and a filter screen; the cooling water pipes are arranged vertically and symmetrically in an even number along the cylindrical cooling cavity; the rotating nozzle is connected to a universal joint base and can rotate in any direction within a 120° range.

4. The feeding device for segregated aluminum ingots according to claim 1, characterized in that: In the ventilation system, the exhaust port is located on the upper part of the inner wall of the cooling chamber, and the ventilation fan is embedded in the bottom surface of the cooling chamber.

5. The feeding device for segregated aluminum ingots according to claim 1, characterized in that: The furnace bottom locking mechanism can seal and lock the open furnace bottom to the bottom end face of the baking oven side wall, and separate it from the baking oven when the open furnace bottom needs to be moved away.

6. The feeding device for segregated aluminum ingots according to claim 1, characterized in that: The cooling pipe of the segregation rotor is provided with an air inlet and an exhaust outlet; the top of the cooling pipe is provided with a lifting lug for hoisting the segregation rotor; when the segregation rotor is moved into the baking oven for unloading, the gantry robot arm is moved away, and the lifting lug is replaced by a fixed clamp to hold and fix it, so as to prevent the gantry robot arm from being damaged by excessive loading force during unloading.

7. The feeding device for segregated aluminum ingots according to claim 1, characterized in that: The truss manipulator moves horizontally on the truss guide rail, which is located directly above the segregation furnace, cooling chamber, and baking furnace. Truss limiting devices are installed at both ends of the truss guide rail. The movement of the truss manipulator along the truss guide rail is driven by a transmission motor, and the lifting action of the truss manipulator is driven by a lifting motor. The gripper at the lower end of the truss manipulator can hold the lifting lug at the top of the segregation rotor.

8. The feeding device for segregated aluminum ingots according to claim 1, characterized in that: The feeding device also includes a lifting material trolley. When it is necessary to receive segregated aluminum ingots, the trolley is raised to support the open furnace bottom of the baking furnace. After the open furnace bottom receives the segregated aluminum ingots, the trolley is lowered and drives the open furnace bottom to move away.

9. A method for feeding segregated aluminum ingots using the feeding device described in any one of claims 1-8, characterized in that: The method includes sequential processes of aluminum ingot segregation, segregated ingot cooling, and segregated ingot baking and unloading. The aluminum ingot segregation refers to inserting a segregation rotor with rotation and cooling functions under the molten aluminum in the segregation furnace for a certain period of time, during which the molten aluminum continuously crystallizes and precipitates around the surface of the segregation rotor, eventually forming a "bell-shaped" segregated aluminum ingot. The segregated ingot cooling refers to transferring the high-temperature segregated aluminum ingot from the segregation furnace to a cooling chamber for spray cooling. The segregated ingot baking and unloading refers to transferring the cooled segregated aluminum ingot from the cooling chamber to a baking furnace for heating, and then applying a demolding force parallel to the axis of the segregation rotor through a unloading mechanism to remove the segregated aluminum ingot from the segregation rotor.

10. The method for feeding segregated aluminum ingots according to claim 9, characterized in that: During the aluminum ingot segregation process, the temperature of the molten aluminum is 680-700℃, the segregation rotor speed is 250-300rpm, and the temperature of the cooling gas introduced into the cooling pipe is 20-30℃ with a flow rate of 500-800NL / min. During the cooling process of the segregated ingot, the spray cooling medium is pure water with a resistivity of 18.2 MΩ·cm and a water pressure of 50-150 N; before spray cooling, the ventilation fan is started with a wind speed ≤1 m / s; the segregated aluminum ingot is cooled to the core temperature of 150-200℃. During the baking and feeding process of the segregated ingot, the baking heating temperature is automatically controlled in segments: when the ingot surface temperature is ≤600℃, the heating temperature is ≥700℃; when the ingot surface temperature is >600℃, the heating temperature is 600℃≤660℃; the corresponding baking time is the time required for the ingot core temperature to reach above 450℃. When removing segregated aluminum ingots through the feeding mechanism, the rated load applied is 10-50KN, and the loading is carried out at a uniform speed of 10-50N / s.

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