Intelligent purification device for continuously preparing high-purity aluminum and production method thereof

Abstract

The invention discloses an intelligent purification device for continuously preparing high-purity aluminum and a production method of the intelligent purification device, and relates to the technical field of nonferrous metallurgy. A molten aluminum heat preservation furnace communicates with a molten aluminum purification furnace, the output end of a lifting module is provided with a first rotating module, and the output end of the first rotating module is connected with a purification support; purification modules are arranged at the two ends of the purification support, each purification module comprises a second rotating module, a purification crystallizer, a cold air inlet pipe, a gas distributor and a cold air outlet pipe, the second rotating modules are fixedly arranged on the purification support, the output ends of the second rotating modules are connected with the purification crystallizers, and one end of each cold air inlet pipe extends into the corresponding purification crystallizer; a gas outlet in the top of the purification crystallizer is connected with a gas distributor which is connected with a cold gas outlet pipe. According to the method, the purification quality and production efficiency of high-purity aluminum can be improved, the full-automatic separation and purification process of molten aluminum of different grades can be achieved, continuous production is achieved, and the segregation production quality stability is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of non-ferrous metallurgy, and more specifically, to an intelligent purification device for continuously preparing high-purity aluminum and a production method thereof. Background Art

[0002] Using the segregation method to purify metals, especially aluminum, is a mature industrial process method. In the prior art, for example, the invention patent with the publication number CN115747515B discloses a high-purity aluminum continuous purification device, including a purification furnace and a heating furnace arranged at the upper end of a frame. A cooling crystallization mechanism is arranged at the upper end of the purification furnace, a water separation seat is arranged at the lower end of the cooling crystallization mechanism, and a heat exchange seat is arranged in the middle of the cooling crystallization tube. When cooling water enters the water separation seat through a first water pipe, a part of the cooling water will enter the cooling crystallization tube through a first opening, and another part of the cooling water will enter the heat exchange seat through a second water pipe. The cooling water that first enters the cooling crystallization tube will be remixed with the previously separated cooling water in the heat exchange seat during its upward flow, so as to achieve the purpose of cooling it. Although this method improves the purification cooling system, its production process still fails to achieve continuous and high-efficiency production and cannot be intelligently controlled during the production process; the invention patent with the publication number CN113774231B discloses a device for producing high-purity aluminum using the segregation method, including a crystallization furnace and a crystallizer. By using an instant heating cooling device to accurately control the cooling temperature of the crystallizer, the purity of high-purity aluminum is improved, crystal breakage is avoided, and the production efficiency of high-purity aluminum is increased. However, this method also has problems of discontinuous production process and low purification efficiency. Summary of the Invention

[0003] The technical problem to be solved by the present invention is that the existing purification equipment has problems of discontinuous production process, low purification efficiency, and high purification cost. To overcome the defects of the prior art, the present invention provides an intelligent purification device for continuously preparing high-purity aluminum and a production method thereof, which can not only improve the purification quality and production efficiency of high-purity aluminum, but also realize the fully automatic separation and purification process of aluminum liquid with different grades, achieve continuous production, save labor costs, and improve the quality stability of segregation production.

[0004] To achieve this purpose, the present invention adopts the following technical solutions: The present invention provides an intelligent purification device for continuously preparing high-purity aluminum, which includes an aluminum liquid holding furnace, an aluminum liquid purification furnace, a purification mechanism, an ingot removal mechanism, and an intelligent control module. The aluminum liquid holding furnace, the aluminum liquid purification furnace, the purification mechanism, and the ingot removal mechanism are all electrically connected to the intelligent control module. The aluminum liquid holding furnace and the aluminum liquid purification furnace are connected in communication. The purification mechanism includes a lifting module, a first rotation module, a purification support, and a purification module. The output end of the lifting module is provided with the first rotation module. The output end of the first rotation module is connected to the purification support. Both ends of the purification support are provided with purification modules, and the two purification modules are respectively arranged corresponding to the aluminum liquid purification furnace and the ingot removal mechanism. The purification module includes a second rotation module, a purification crystallizer, a cold air inlet pipe, a gas distributor, and a cold air outlet pipe. The second rotation module is fixedly arranged on the purification support. The output end of the second rotation module is connected to the purification crystallizer. One end of the cold air inlet pipe extends into the purification crystallizer. The gas outlet at the top of the purification crystallizer is connected to the gas distributor, and the gas distributor is connected with the cold air outlet pipe.

[0005] In a preferred technical solution of the present invention, the aluminum liquid purification furnace includes a purification furnace body, a purification furnace cover, a purification crucible, and an electromagnetic stirrer. The top of the purification furnace body is provided with a purification furnace cover that can automatically open and close, and the purification furnace cover is rotatably connected to the purification crystallizer. The purification furnace cover is provided with a vacuum system channel, and the purification furnace body is provided with a purification crucible and an electromagnetic stirrer.

[0006] In a preferred technical solution of the present invention, the aluminum liquid holding furnace includes a holding furnace body, a holding furnace cover, a heating crucible, a resistance heater, a feed pipe, a first electric control valve, an aluminum liquid holding and transfer package, and a metering module. The top of the holding furnace body is provided with a holding furnace cover. The holding furnace body is provided with a heating crucible and a resistance heater, and the heating crucible and the purification crucible are connected through a first aluminum liquid channel and a second aluminum liquid channel. One side of the holding furnace body is also provided with an aluminum liquid holding and transfer package. The aluminum liquid holding and transfer package is connected to the heating crucible through the feed pipe. The bottom of the aluminum liquid holding and transfer package is provided with a metering module, and the feed pipe is provided with a first electric control valve.

[0007] In a preferred technical solution of the present invention, the holding furnace cover is also provided with an inert gas channel, a temperature measuring thermocouple, and a liquid level ranging module.

[0008] In a preferred technical solution of the present invention, the first aluminum liquid channel is located above the second aluminum liquid channel, and the ratio of the diameter of the first aluminum liquid channel to the diameter of the second aluminum liquid channel is 1-5.

[0009] In a preferred technical solution of the present invention, temperature gauges are arranged on both the cold air inlet pipe and the cold air outlet pipe. A flow meter, a pressure gauge, and a second electric control valve are also arranged on the cold air inlet pipe.

[0010] In a preferred technical solution of the present invention, the ingot stripping mechanism includes an ingot stripping support, an ingot receiving transfer cart, an ingot stripping driving part, an ingot stripping pressing plate, a spraying module, and a positioning module. An ingot receiving transfer cart is arranged inside the ingot stripping support. On both sides of the ingot receiving transfer cart, ingot stripping driving parts are symmetrically arranged, and the ingot stripping driving parts are fixed on the ingot stripping support. The output end of the ingot stripping driving part is connected with an ingot stripping pressing plate. The spraying module is horizontally arranged on the ingot stripping support, and a positioning module for positioning the ingot receiving transfer cart is also arranged on the ingot stripping driving part.

[0011] The present invention also provides a method for producing high-purity aluminum, which is realized based on an intelligent purification device for continuously preparing high-purity aluminum, and includes the following steps: S1. After melting high-purity aluminum raw materials with a purity of 3N to 5N into aluminum liquid, put the aluminum liquid into an aluminum liquid heat preservation transfer package, and place the aluminum liquid heat preservation transfer package on the metering module; close the heat preservation furnace cover, open the first electric control valve, and make the aluminum liquid flow into the heating crucible through the feed pipe; as the liquid level of the aluminum liquid in the heating crucible rises, the aluminum liquid will enter the purification crucible through the first aluminum liquid channel and the second aluminum liquid channel. S2. Start the resistance heater to heat the aluminum liquid in the heating crucible, and the temperature measuring thermocouple monitors the temperature of the aluminum liquid in real time; open the inert gas channel and introduce inert protective gas into the upper space of the heating crucible; open the vacuum system channel and evacuate the upper space of the purification crucible to a vacuum state. S3. Start the electromagnetic stirrer to drive the aluminum liquid in the purification crucible to rotate clockwise; start the second rotation module to drive the purification crystallizer to rotate counterclockwise in the purification crucible, and introduce a cooling medium into the purification crystallizer through the cold air inlet pipe. After the purification crystallizer cools down, during the rotation process, the high-purity aluminum liquid gradually accumulates around the purification crystallizer to form an inverted mushroom-shaped crystal. S4. When the set segregation time is reached and the first-stage segregated high-purity aluminum ingot reaches the specified size, stop introducing the cooling medium into the cold air inlet pipe, stop the rotation of the purification crystallizer, start the lifting module, drive the two purification modules to lift synchronously, take out the high-purity aluminum ingot from the purification crucible, and then drive the purification support to rotate 180° by the first rotation module to exchange the positions of the two purification modules, and then the lifting module drives the two purification modules to descend to realize the control of switching between the purification station and the ingot stripping station of the two purification modules. S5. Start the ingot stripping mechanism, the ingot stripping driving part drives the ingot stripping pressing plate to move downwards, separate the high-purity aluminum ingot from the purification crystallizer, and let it fall into the ingot receiving transfer cart below. After the temperature of the purification crystallizer drops to 100 - 150 °C, start the spraying module and spray a non-stick aluminum coating on the surface of the purification crystallizer.

[0012] In a preferred technical solution of the present invention, in step S1, when the liquid level ranging module detects that the liquid level of the aluminum liquid in the heating crucible is 10 - 20 cm higher than the upper edge of the first aluminum liquid channel, close the first electric control valve.

[0013] In a preferred technical solution of the present invention, in step S5, the material of the non-stick aluminum coating is alumina or boron nitride, and the thickness of the non-stick aluminum coating is 0.5 to 2.5 mm.

[0014] The beneficial effects of the present invention are as follows: 1. In the present invention, through the intelligent control module provided, the temperature of the purified aluminum liquid and the temperature of the purification crystallizer can be continuously controlled online, thereby improving the purification quality of high-purity aluminum; through the lifting and rotating system composed of the lifting module and the first rotating module, the purification operation and the ingot removal operation are seamlessly connected, realizing a continuous purification production process and improving the production efficiency of high-purity aluminum; through the ingot removal mechanism provided, the problem that the segregation ingot cannot be automatically and quickly separated from the crystallizer in the existing high-purity aluminum production process is solved; through the centralized control programming software of the intelligent control module, the influence of various production parameters on the purification efficiency is regulated online in multiple dimensions, solving the problems of high purification cost, discontinuous purification process and inability to carry out intelligent production in the existing technology.

[0015] 2. In the present invention, through the control method of the opposite rotation of the rotation direction of the aluminum liquid in the aluminum liquid purification furnace and the rotation direction of the purification crystallizer, in cooperation with the aluminum liquid channel between the heating crucible and the purification crucible, the flow rate of the aluminum liquid can be promoted, the upper and lower temperatures of the aluminum liquid are more uniform, the liquid level of the aluminum liquid is not driven, the contact between the aluminum liquid and the air is reduced, the generation of oxides is reduced, and the purification effect is better; at the same time, this control method also speeds up the diffusion rate of the segregation solidification accumulation to form a surface impurity enrichment layer of high-purity aluminum crystallized substances, thereby further improving the quality of segregation purification.

[0016] 3. In the present invention, through the intelligent control module, the temperature and height of the aluminum liquid are automatically controlled, and at the same time, the aluminum liquid in the heating crucible is protected by an anti-oxidation inert gas and the aluminum liquid in the purification crucible is subjected to vacuum impurity removal, which is beneficial to the improvement of the segregation purification quality.

[0017] 4. In the present invention, the temperature, flow rate and pressure of the cooling medium are detected by a thermometer, a flow meter and a pressure gauge, and the test data is transmitted back to the intelligent control module. The intelligent control module calculates the optimal range and regulates the current deviation, so that the external geometric dimensions of the segregation purification products produced in each furnace are basically the same, which not only meets the external dimension requirements of the ingot removal mechanism but also achieves the goal that the segregation process must be stable.

[0018] 5. In the present invention, after the segregation purification production system from the automatic replenishment of aluminum liquid to the automatic ingot removal of the segregation ingot realizes automated operation, the entire process is continuous, reducing the labor intensity and improving the segregation purification quality and production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1It is a schematic structural diagram of an intelligent purification device for continuously preparing high-purity aluminum provided by the specific implementation manner of the present invention.

[0020] In the figure: 1. Aluminum liquid holding furnace; 101. Holding furnace body; 102. Holding furnace cover; 103. Heating crucible; 104. Resistance heater; 105. Feed pipe; 106. First electric control valve; 107. Aluminum liquid holding and transfer ladle; 108. Metering module; 109. Inert gas channel; 110. Temperature measuring thermocouple; 111. Liquid level ranging module; 2. Aluminum liquid purification furnace; 21. Purification furnace body; 22. Purification furnace cover; 23. Vacuum system channel; 24. Purification crucible; 25. Electromagnetic stirrer; 26. First aluminum liquid channel; 27. Second aluminum liquid channel; 3. Purification mechanism; 31. Lifting module; 32. First rotation module; 33. Purification support; 34. Purification module; 341. Second rotation module; 342. Purification crystallizer; 343. Cold air inlet pipe; 344. Gas distributor; 345. Cold air outlet pipe; 346. Thermometer; 347. Flowmeter; 348. Pressure gauge; 349. Second electric control valve; 4. Ingot stripping mechanism; 41. Ingot stripping support; 42. Ingot receiving and transfer cart; 43. Ingot stripping drive part; 44. Ingot stripping pressing plate; 45. Spraying module; 46. Positioning module. Specific implementation manner

[0021] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation manners.

[0022] As Figure 1As shown in the figure, in the embodiment, an intelligent purification device for continuously preparing high-purity aluminum is provided, which includes an aluminum liquid holding furnace 1, an aluminum liquid purification furnace 2, a purification mechanism 3, an ingot removal mechanism 4 and an intelligent control module. The aluminum liquid holding furnace 1, the aluminum liquid purification furnace 2, the purification mechanism 3 and the ingot removal mechanism 4 are all electrically connected to the intelligent control module. The aluminum liquid holding furnace 1 and the aluminum liquid purification furnace 2 are connected in communication. The purification mechanism 3 includes a lifting module 31, a first rotation module 32, a purification support 33 and a purification module 34. The output end of the lifting module 31 is provided with the first rotation module 32. The output end of the first rotation module 32 is connected to the purification support 33. Both ends of the purification support 33 are provided with purification modules 34, and the two purification modules 34 are respectively arranged corresponding to the aluminum liquid purification furnace 2 and the ingot removal mechanism 4. The purification module 34 includes a second rotation module 341, a purification crystallizer 342, a cold air inlet pipe 343, a gas distributor 344 and a cold air outlet pipe 345. The second rotation module 341 is fixedly arranged on the purification support 33. The output end of the second rotation module 341 is connected to the purification crystallizer 342. One end of the cold air inlet pipe 343 extends into the purification crystallizer 342. The top air outlet of the purification crystallizer 342 is connected to the gas distributor 344. The gas distributor 344 is connected with the cold air outlet pipe 345. In this embodiment, both the aluminum liquid holding furnace 1 and the aluminum liquid purification furnace 2 are fixedly installed on the ground. The aluminum liquid holding furnace 1 is used to heat the aluminum liquid to keep it in a liquid state. And because the aluminum liquid holding furnace 1 and the aluminum liquid purification furnace 2 are connected in communication, the aluminum liquid can flow between the two. The purification mechanism 3 is used to segregate and prepare high-purity aluminum ingots from the aluminum liquid in the aluminum liquid purification furnace 2. Among them, the lifting module 31 is fixedly installed on the ground. The lifting module 31 is preferably a hydraulic rod, which is used to drive the purification support 33 to move up and down, and then drive the purification module 34 to move up and down synchronously. The first rotation module 32 is preferably a rotating seat or a rotating motor, which is used to drive the purification support 33 to rotate, and then drive the purification module 34 to rotate synchronously. There are two purification modules 34 in total. During the working process, one of the purification modules 34 is located in the aluminum liquid purification furnace 2 (i.e., at the purification station), which is used to prepare high-purity aluminum ingots, and the other purification module 34 is located in the ingot removal mechanism 4 (i.e., at the ingot removal station), which is used to remove the high-purity aluminum ingots on the purification crystallizer 342.The second rotation module 341 is preferably a rotating seat or a rotating motor, which is used to drive the purification crystallizer 342 to rotate in the molten aluminum purification furnace 2. During the process of driving the purification crystallizer 342 to rotate, it is necessary to ensure that its rotation speed is appropriate to keep the molten aluminum liquid level from being driven, reduce the contact between the molten aluminum and the air, and reduce the generation of oxides. The purification crystallizer 342 is cylindrical in shape, with an outer diameter ranging from 100 to 300 mm and a height ranging from 300 to 500 mm. The high-purity aluminum ingot produced by the purification crystallizer 342 is also in an inverted mushroom-shaped conical structure, with an outer diameter ranging from 300 to 500 mm and a height ranging from 300 to 500 mm. A cooling chamber is also provided inside the purification crystallizer 342. A cooling medium can be introduced into the cooling chamber through the cold air inlet pipe 343, thereby cooling the purification crystallizer 342 and causing the molten aluminum to precipitate on the surface of the purification crystallizer 342. The cold air inlet pipe 343 is in an L-shaped structure and is fixedly installed on the purification support 33. An air outlet is also provided at the top of the purification crystallizer 342, and the cold air inlet pipe 343 and the air outlet are concentrically arranged, so that the cooling medium in the cooling chamber can be discharged from the air outlet. The provided gas distributor 344 can control the air outlet flow rate and adjust the air pressure in the cooling chamber. There are two cold air outlet pipes 345, and one end of each cold air outlet pipe 345 is connected to the gas distributor 344. The intelligent control module can be a single-chip microcomputer, or a PLC, or other digital processors. A centralized control programming software is preset in the intelligent control module, so as to be able to control the coordinated operation of each component. In addition, all the components used in this device are available on the market.

[0023] Specifically, the molten aluminum purification furnace 2 includes a purification furnace body 21, a purification furnace cover 22, a purification crucible 24, and an electromagnetic stirrer 25. A purification furnace cover 22 that can automatically open and close is provided at the top of the purification furnace body 21, and the purification furnace cover 22 is rotationally connected to the purification crystallizer 342. A vacuum system channel 23 is provided on the purification furnace cover 22, and a purification crucible 24 and an electromagnetic stirrer 25 are provided inside the purification furnace body 21. In this embodiment, the purification furnace body 21 is made of a heat-insulating material, which can play a role in heat preservation and heat insulation. The purification furnace cover 22 is used to close the top opening of the purification furnace body 21. At the same time, the vacuum system channel 23 is connected to a vacuum pump, and the upper space of the purification crucible 24 can be evacuated to a vacuum state. The purification crucible 24 is used to hold the molten aluminum, and during the purification operation, the purification crucible 24 and the purification crystallizer 342 are concentrically arranged. The electromagnetic stirrer 25 is installed outside the purification crucible 24 and can drive the molten aluminum in the purification crucible 24 to rotate by using a magnetic field.

[0024] Specifically, the molten aluminum holding furnace 1 includes a holding furnace body 101, a holding furnace cover 102, a heating crucible 103, a resistance heater 104, a feed pipe 105, a first electric control valve 106, a molten aluminum heat-insulating transfer package 107, and a metering module 108. A holding furnace cover 102 is provided at the top of the holding furnace body 101. A heating crucible 103 and a resistance heater 104 are provided inside the holding furnace body 101. The heating crucible 103 and the purification crucible 24 are connected through a first molten aluminum channel 26 and a second molten aluminum channel 27. A molten aluminum heat-insulating transfer package 107 is also provided on one side of the holding furnace body 101. The molten aluminum heat-insulating transfer package 107 is connected to the heating crucible 103 through the feed pipe 105. A metering module 108 is provided at the bottom of the molten aluminum heat-insulating transfer package 107. A first electric control valve 106 is provided on the feed pipe 105. In this embodiment, the holding furnace body 101 is made of heat-insulating material and can play a role in heat preservation and insulation. The holding furnace cover 102 is used to seal the top opening of the holding furnace body 101 to prevent air from entering and causing oxidation of the molten aluminum. The heating crucible 103 is used to hold the molten aluminum, and the resistance heater 104 is installed outside the heating crucible 103 to heat the heating crucible 103 and the molten aluminum, so as to ensure that the molten aluminum always remains in a liquid state. Both the first molten aluminum channel 26 and the second molten aluminum channel 27 are horizontally arranged, and the molten aluminum can flow between the heating crucible 103 and the purification crucible 24 through the first molten aluminum channel 26 and the second molten aluminum channel 27, so as to keep the temperature and the liquid level of the molten aluminum in the heating crucible 103 and the purification crucible 24 always consistent. The molten aluminum heat-insulating transfer package 107 is a movable transfer package, which is convenient for transferring the molten aluminum. The metering module 108 is preferably an electronic scale and is used to detect the weight of the molten aluminum heat-insulating transfer package 107. When the weight of the molten aluminum in the molten aluminum heat-insulating transfer package 107 is detected to be lower than the set value, the alarm light starts to flash, reminding the staff to replace the molten aluminum heat-insulating transfer package 107. At the same time, it is also convenient to monitor the amount of the molten aluminum input from the molten aluminum heat-insulating transfer package 107 into the heating crucible 103 in real time. One end of the feed pipe 105 is connected to the bottom of one side of the molten aluminum heat-insulating transfer package 107, and the other end of the first feed pipe 105 is connected to the top of one side of the heating crucible 103. The first electric control valve 106 is used to control the on-off of the feed pipe 105, and further control whether to continue feeding the heating crucible 103.

[0025] Specifically, an inert gas passage 109, a temperature measuring thermocouple 110, and a liquid level ranging module 111 are further provided on the heat preservation furnace cover 102. In this embodiment, inert gas can be input into the heat preservation furnace body 101 through the inert gas passage 109, and the air above the heating crucible 103 can be discharged to avoid quality problems caused by the oxidation of the aluminum liquid. The temperature measuring thermocouple 110 is used to monitor the temperature of the aluminum liquid in the heating crucible 103 in real time, and the preset aluminum liquid temperature range in the intelligent control module is 680 - 710 °C. When the temperature measuring thermocouple 110 detects that the aluminum liquid temperature is lower than the preset temperature range, the intelligent control module will control the resistance heater 104 to heat the aluminum liquid, and when it detects that the aluminum liquid temperature is higher than the preset temperature range, it will control the resistance heater 104 to stop working. The model of the liquid level ranging module 111 is preferably a GOLDY-10A type laser aluminum water level gauge, which is used to detect the liquid level height of the aluminum liquid in the heating crucible 103. When the liquid level height of the aluminum liquid reaches the set value, it will control the first electric control valve 106 to close, and then disconnect the feed pipe 105.

[0026] Specifically, the first aluminum liquid passage 26 is located above the second aluminum liquid passage 27, and the ratio of the diameter of the first aluminum liquid passage 26 to the diameter of the second aluminum liquid passage 27 is 1 - 5.

[0027] Specifically, temperature gauges 346 are provided on both the cold air inlet pipe 343 and the cold air outlet pipe 345. A flow meter 347, a pressure gauge 348, and a second electric control valve 349 are further provided on the cold air inlet pipe 343. In this embodiment, the temperature gauge 346 on the cold air inlet pipe 343 is used to monitor the inlet air temperature in real time, and the temperature gauge 346 on the cold air outlet pipe 345 is used to monitor the outlet air temperature in real time. The provided flow meter 347 is used to monitor the inlet air flow, the provided pressure gauge 348 is used to monitor the inlet air pressure in real time, and through the mutual cooperation of the gas distributor 344 and the pressure gauge 348 and other structures, it is convenient to accurately control the pressure in the cooling chamber of the purification crystallizer 342. The second electric control valve 349 is used to control the on-off of the cold air inlet pipe 343. When the purification crystallizer 342 in the purification crucible 24 reaches the set segregation time, the corresponding second electric control valve 349 can be controlled to close and disconnect the cold air inlet pipe 343.

[0028] Specifically, the ingot stripping mechanism 4 includes an ingot stripping support 41, an ingot receiving transfer cart 42, an ingot stripping drive unit 43, an ingot stripping pressing plate 44, a spraying module 45 and a positioning module 46. The ingot receiving transfer cart 42 is arranged inside the ingot stripping support 41. The ingot stripping drive units 43 are symmetrically arranged on both sides of the ingot receiving transfer cart 42 and are fixed on the ingot stripping support 41. The output end of the ingot stripping drive unit 43 is connected to the ingot stripping pressing plate 44. The spraying module 45 is horizontally arranged on the ingot stripping support 41. The positioning module 46 for positioning the ingot receiving transfer cart 42 is further arranged on the ingot stripping drive unit 43. In this embodiment, the ingot stripping support 41 is of a frame structure and is fixedly installed on the ground. A crystallizer flange is further arranged at the top of the purification crystallizer 342, and the bottom end of the crystallizer flange is in abutting fit with the ingot stripping support 41 for positioning the height of the purification crystallizer 342. The ingot receiving transfer cart 42 is arranged directly below the purification crystallizer 342 located at the ingot stripping support 41 for receiving the stripped high-purity aluminum ingots to facilitate the transfer operation. The ingot stripping drive unit 43 is preferably a hydraulic cylinder, which can drive the ingot stripping pressing plate 44 to move up and down, thereby peeling the high-purity aluminum ingots from the purification crystallizer 342. The ingot stripping pressing plate 44 is a folded plate, and the two ingot stripping pressing plates 44 are symmetrically arranged on both sides of the purification crystallizer 342. The spraying module 45 includes a nozzle, which can spray a non-stick aluminum coating on the surface of the purification crystallizer 342 after the high-purity aluminum ingots on the surface of the purification crystallizer 342 are peeled off, so as to reduce the difficulty of the next ingot stripping. The positioning module 46 is used to position the ingot receiving transfer cart 42, so as to detect whether there is an ingot receiving transfer cart 42 at the ingot stripping support 41 before the device works. If not, an alarm will be issued to remind the staff, thus ensuring the normal operation of the equipment.

[0029] This embodiment also provides a method for producing high-purity aluminum, which is realized based on an intelligent purification device for continuously preparing high-purity aluminum, and includes the following steps: S1. After melting high-purity aluminum raw materials with a purity of 3N to 5N into aluminum liquid, put the aluminum liquid into the aluminum liquid heat preservation transfer package 107. The capacity of the aluminum liquid heat preservation transfer package 107 is 300 - 3000 kg / bag, the temperature of the aluminum liquid is set at 700 - 780 °C, and place the aluminum liquid heat preservation transfer package 107 on the metering module 108 to connect it with the feed pipe 105; close the heat preservation furnace cover 102, open the first electric control valve 106, and make the aluminum liquid in the aluminum liquid heat preservation transfer package 107 flow into the heating crucible 103 heated to 700 - 800 °C through the feed pipe 105. The capacity of the heating crucible 103 is 300 - 1000 kg; as the liquid level of the aluminum liquid in the heating crucible 103 rises, the aluminum liquid will enter the purification crucible 24 with a temperature of 700 - 800 °C through the first aluminum liquid channel 26 and the second aluminum liquid channel 27. The capacity of the purification crucible 24 is 300 - 1000 kg; when the liquid level distance measuring module 111 detects that the liquid level of the aluminum liquid in the heating crucible 103 is 10 - 20 cm higher than the upper edge of the first aluminum liquid channel 26, close the first electric control valve 106 to stop adding aluminum liquid to the heating crucible 103; S2. Start the resistance heater 104 to heat the aluminum liquid in the heating crucible 103 to keep its temperature at 680 - 710 °C. The temperature measuring thermocouple 110 can monitor the temperature of the aluminum liquid in real time and transmit relevant parameters back to the intelligent control module. When the temperature is lower than the set range (i.e., 680 - 710 °C), the intelligent control module will control the resistance heater 104 to start. On the contrary, when the temperature is higher than the set range, it will control the resistance heater 104 to stop working; open the inert gas channel 109 and introduce inert protective gas into the upper space of the heating crucible 103. The time for introducing the inert protective gas is 10 - 45 min, and the inert protective gas is nitrogen or argon; open the vacuum system channel 23, evacuate the upper space of the purification crucible 24 to a vacuum state, and control the vacuum degree to be maintained at 1×10 -3 Pa; S3. Start the electromagnetic stirrer 25 to drive the aluminum liquid in the purification crucible 24 to rotate clockwise by magnetic force, and the rotation speed is 10 - 40 rpm / min; start the second rotation module 341 to drive the purification crystallizer 342 to rotate counterclockwise in the purification crucible 24, and the rotation speed is 100 - 300 rpm / min. And introduce a cooling medium into the purification crystallizer 342 through the cold air inlet pipe 343 for cooling. The flow rate of the cooling medium is 100 - 500 L / min. The cooling medium is one or a mixture of two of water or compressed air, and the temperature is the ambient temperature. And make the cooling medium enter the gas distributor 344 and the cold air outlet pipe 345 through the top air outlet of the purification crystallizer 342 and then be discharged. After the cooling medium cools the purification crystallizer 342, during the rotation process, the high-purity aluminum liquid gradually accumulates around the purification crystallizer 342 to form an inverted mushroom-shaped crystal; S4. When the set segregation time is reached, the first-stage segregated high-purity aluminum ingot reaches the specified size. Among them, the first-stage purification time is 100 - 300 min, the diameter range of the specified size is 300 - 500 mm, and the height range is 300 - 500 mm. At this time, the supply of the cooling medium to the cold air inlet pipe 343 is stopped, the rotation of the purification crystallizer 342 is stopped, the lifting module 31 is started, and the two purification modules 34 are driven to lift synchronously by 500 - 700 mm to take out the high-purity aluminum ingot from the purification crucible 24. Then, the purification support 33 is driven by the first rotation module 32 to rotate 180°, so that the positions of the two purification modules 34 are interchanged. Then, the lifting module 31 drives the two purification modules 34 to descend until the crystallizer flange abuts against the ingot removal support 41. At this time, the bottom end of the purification crystallizer 342 without the attached high-purity aluminum ingot extends into the aluminum liquid surface in the purification crucible 24 at 250 - 400 mm for purification operation again, while the purification crystallizer 342 with the attached high-purity aluminum ingot moves to the ingot removal support 41 for ingot removal operation, so as to control the switching between the two purification modules 34 between the purification station and the ingot removal station; S5. Start the ingot removal mechanism 4. The ingot removal driving part 43 drives the ingot removal pressing plate 44 to move downward. The downward pressure range of the ingot removal pressing plate 44 is 200 - 2000 kg, and the downward pressing stroke is 50 - 100 mm, so as to separate the high-purity aluminum ingot from the purification crystallizer 342 and fall into the ingot receiving transfer cart 42 below. The ingot receiving transfer cart 42 containing the segregated high-purity aluminum ingot is transported to the designated location by a forklift. Then, after the temperature of the purification crystallizer 342 drops to 100 - 150 °C, start the spraying module 45, and at the same time, the second rotation module 341 will drive the purification crystallizer 342 to rotate, so as to spray a non-stick aluminum coating on the surface of the purification crystallizer 342. The material of the non-stick aluminum coating is alumina or boron nitride, and the sprayed coating is required to be uniform, and the thickness range is 0.5 - 2.5 mm.

[0030] In addition, during the working process of this device, the centralized control programming software in the intelligent control module can perform multi-dimensional online dynamic adjustment on key process parameters to ensure the optimization of parameter matching in the purification and segregation process. The specific control mechanism is as follows: 1) Constant control of the aluminum liquid temperature in the purification crucible 24: The temperature of the aluminum liquid is measured in real time and online by the temperature measuring thermocouple 110 on the heat preservation furnace cover 102. The relevant parameters are transmitted back to the centralized control programming software. After being compared with the software-set temperature, the resistance heater 104 is controlled to keep warm or heat. Then, the electromagnetic stirrer 25 provides a clockwise horizontal rotation force to the aluminum liquid in the purification crucible 24, and then through the first aluminum liquid channel 26 and the second aluminum liquid channel 27, the aluminum liquid in the purification crucible 24 is fully mixed with the aluminum liquid in the heating crucible 103, so as to achieve the effect of controlling the aluminum liquid temperature to be consistent; 2) Constant control of the height of the molten aluminum in the purification crucible 24: The liquid level ranging module 111 on the heat preservation furnace cover 102 measures the height of the molten aluminum in real time and online. The relevant parameters are transmitted back to the centralized control programming software. After comparing with the set height of the molten aluminum in the software, the opening degree of the first electric control valve 106 on the feed pipe 105 is controlled to control the size of the molten aluminum flow rate. Then, through the molten aluminum channel, the liquid levels of the molten aluminum in the molten aluminum heat preservation furnace 1 and the molten aluminum purification furnace 2 are kept consistent. When the intelligent control module detects that the weight of the molten aluminum in the molten aluminum heat preservation transfer package 107 is lower than the set value through the metering module 108, the alarm light at the position of the molten aluminum heat preservation transfer package 107 starts to flash, reminding the staff to replace the molten aluminum heat preservation transfer package 107; 3) Inert gas and vacuum system control: Before starting the purification mechanism 3, the system automatically sends inert gas into the upper part of the molten aluminum heat preservation furnace 1 through the inert gas channel 109 and evacuates the upper space of the molten aluminum purification furnace 2 into a vacuum state through the vacuum system channel 23; 4) Control of the external dimensions of the segregation ingot: After starting the purification mechanism 3, the system automatically opens the second electric control valve 349 on the cold air inlet pipe 343. By comparing the pressure, flow rate, and temperature of the cooling medium set in the centralized control programming software with the online measured values, the opening degree of the second electric control valve 349 is adjusted online to make the relevant data match the set values. Under the synchronous control of the molten aluminum temperature and the height of the molten aluminum, the purification rates of the segregation ingots in different batches are the same, so as to ensure that the external dimensions of the segregation ingots in different batches are consistent.

[0031] 5) Control of the purification time of the segregation ingot: According to production needs, the system sets the purification time of the segregation ingot in advance. When there is still 1 minute left before the purification time of the segregation ingot, the intelligent control module will control to close the second electric control valve 349. The second rotation module 341 reduces the rotation speed, and the lifting module 31 slowly rises to the highest position, lifting the segregation ingot to the upper part of the molten aluminum purification furnace 2. Then the intelligent control module controls the first rotation module 32 to start, driving the purification support 33 to rotate 180°, swapping the positions of the two purification modules 34. At this time, the purification module 34 without a high-purity aluminum ingot attached rotates to the position of the molten aluminum purification furnace 2, while the purification module 34 with a high-purity aluminum ingot attached rotates to the ingot stripping mechanism 4.

[0032] 6) Control of the ingot stripping mechanism 4: After starting the purification mechanism 3, the intelligent control module automatically starts the ingot stripping mechanism 4. After the ingot stripping driving part 43 drives the end of the ingot stripping pressing plate 44 to descend to the upper surface of the segregation high-purity aluminum ingot, under the action of the downward pressure, the segregation high-purity aluminum ingot is completely separated from the purification crystallizer 342 and falls into the ingot receiving transfer vehicle 42 that has been detected by the positioning module 46.

[0033] 7) Purification crystallizer 342 spraying control: The intelligent control module starts the purification mechanism 3 to operate for 60 minutes. At this time, the second rotation module 341 located at the ingot stripping station starts and drives the purification crystallizer 342 to rotate at a low speed. At the same time, the intelligent control module turns on the spraying module 45 to spray for 1 minute. Under the action of pressure, the liquid coating covers the entire outer surface of the purification crystallizer 342, and the existing residual temperature of the purification crystallizer 342 is used to dry the coating for standby.

[0034] 8) When the set purification batch of segregation ingots is reached, the device is shut down, and the cooling medium is stopped from being introduced into the cold air inlet pipe 343. The purification crystallizer 342 is lifted and rotated 180°, and the high-purity aluminum segregation ingot on the purification crystallizer 342 is pressed and stripped to obtain a high-purity high-purity aluminum segregation ingot. Then, the remaining aluminum liquid in the purification crucible 24 is poured out. According to the product requirements, the segregated high-purity aluminum segregation ingot is melted again, and the above steps S1-S5 are repeated to obtain a higher-purity high-purity aluminum segregation ingot.

[0035] The present invention is described through preferred embodiments. Those skilled in the art know that various changes or equivalent replacements can be made to these features and embodiments without departing from the spirit and scope of the present invention. The present invention is not limited by the specific embodiments disclosed herein, and other embodiments falling within the scope of the claims of this application belong to the scope of protection of the present invention.

Claims

1. An intelligent purification device for continuously preparing high-purity aluminum, characterized in that: The invention comprises an aluminum liquid insulation furnace (1), an aluminum liquid purification furnace (2), a purification mechanism (3), a stripping mechanism (4) and an intelligent control module. The aluminum liquid insulation furnace (1), the aluminum liquid purification furnace (2), the purification mechanism (3) and the stripping mechanism (4) are all electrically connected to the intelligent control module. The aluminum liquid insulation furnace (1) and the aluminum liquid purification furnace (2) are connected to each other. The purification mechanism (3) comprises a lifting module (31), a first rotating module (32), a purification bracket (33) and a purification module (34). The lifting module (31) is provided with a first rotating module (32) at an output end. The first rotating module (32) is connected to a purification bracket (33) at an output end. The purification modules (34) are provided at both ends of the purification bracket (33). The two purification modules (34) are respectively arranged corresponding to the aluminum liquid purification furnace (2) and the stripping mechanism (4); the purification module (34) comprises a second rotating module (341), a purification crystallizer (342), a cold air inlet pipe (343), a gas distributor (344) and a cold air outlet pipe (345); the second rotating module (341) is fixedly arranged on the purification bracket (33); the output end of the second rotating module (341) is connected to the purification crystallizer (342); one end of the cold air inlet pipe (343) extends into the purification crystallizer (342); the top air outlet of the purification crystallizer (342) is connected to the gas distributor (344); and the gas distributor (344) is connected to the cold air outlet pipe (345).

2. The intelligent purification device for continuously preparing high-purity aluminum according to claim 1, characterized in that: The aluminum liquid purification furnace (2) comprises a purification furnace body (21), a purification furnace cover (22), a purification crucible (24) and an electromagnetic stirrer (25); a purification furnace cover (22) capable of opening and closing automatically is arranged on the top of the purification furnace body (21), and the purification furnace cover (22) is rotatably connected to the purification crystallizer (342); a vacuum system channel (23) is arranged on the purification furnace cover (22); and a purification crucible (24) and an electromagnetic stirrer (25) are arranged in the purification furnace body (21).

3. The intelligent purification device for continuously preparing high-purity aluminum according to claim 2, characterized in that: The aluminum liquid insulation furnace (1) comprises an insulation furnace body (101), an insulation furnace cover (102), a heating crucible (103), a resistance heater (104), a feed pipe (105), a first electric control valve (106), an aluminum liquid insulation transfer bag (107) and a metering module (108); the insulation furnace cover (102) is arranged on the top of the insulation furnace body (101); the heating crucible (103) and the resistance heater (104) are arranged in the insulation furnace body (101); and the heating crucible (103) and the resistance heater (104) are arranged in the insulation furnace body (101); The crucible (103) and the purification crucible (24) are connected via a first aluminum liquid channel (26) and a second aluminum liquid channel (27); an aluminum liquid insulation transfer bag (107) is also provided on one side of the insulation furnace body (101); the aluminum liquid insulation transfer bag (107) is connected to the heating crucible (103) via a feed pipe (105); a metering module (108) is provided at the bottom of the aluminum liquid insulation transfer bag (107); and a first electric control valve (106) is provided on the feed pipe (105).

4. The intelligent purification device for continuously preparing high-purity aluminum according to claim 3, characterized in that: The heat-insulating furnace cover (102) is also provided with an inert gas channel (109), a temperature-measuring thermocouple (110) and a liquid level distance-measuring module (111).

5. The intelligent purification device for continuously preparing high-purity aluminum according to claim 3, characterized in that: The first aluminum liquid channel (26) is located above the second aluminum liquid channel (27), and the ratio of the diameter of the first aluminum liquid channel (26) to the diameter of the second aluminum liquid channel (27) is 1-5.

6. The intelligent purification device for continuously preparing high-purity aluminum according to claim 1, characterized in that: The cold air inlet pipe (343) and the cold air outlet pipe (345) are both provided with a temperature gauge (346), and the cold air inlet pipe (343) is also provided with a flow meter (347), a pressure gauge (348) and a second electric control valve (349).

7. The intelligent purification device for continuously preparing high-purity aluminum according to claim 1, characterized in that: The stripping mechanism (4) comprises a stripping support (41), an ingot receiving and transfer vehicle (42), a stripping driving unit (43), a stripping pressing plate (44), a spraying module (45) and a positioning module (46); an ingot receiving and transfer vehicle (42) is arranged on the inner side of the stripping support (41); stripping driving units (43) are symmetrically arranged on both sides of the ingot receiving and transfer vehicle (42); the stripping driving unit (43) is fixedly arranged on the stripping support (41); an output end of the stripping driving unit (43) is connected to the stripping pressing plate (44); the spraying module (45) is transversely arranged on the stripping support (41); and a positioning module (46) for positioning the ingot receiving and transfer vehicle (42) is also arranged on the stripping driving unit (43).

8. A method for producing high-purity aluminum, characterized in that: An intelligent purification device for continuously preparing high-purity aluminum according to any one of claims 1 to 7 is implemented, comprising the following steps: S1. Melting high-purity aluminum raw material with a purity of 3N to 5N into aluminum liquid and placing it in an aluminum liquid insulation transfer bag (107), and placing the aluminum liquid insulation transfer bag (107) on a metering module (108); closing the insulation furnace cover (102), opening the first electric control valve (106), and allowing the aluminum liquid to flow into the heating crucible (103) through the feed pipe (105); as the aluminum liquid level in the heating crucible (103) rises, the aluminum liquid will enter the purification crucible (24) through the first aluminum liquid channel (26) and the second aluminum liquid channel (27); S2, starting the resistance heater (104) to heat the aluminum liquid in the heating crucible (103), and the temperature measuring thermocouple (110) monitors the temperature of the aluminum liquid in real time; opening the inert gas channel (109) to introduce an inert protective gas into the upper space of the heating crucible (103); opening the vacuum system channel (23) to evacuate the upper space of the purification crucible (24) into a vacuum state; S3, starting the electromagnetic stirrer (25) to drive the aluminum liquid in the purification crucible (24) to rotate clockwise; starting the second rotation module (341) to drive the purification crystallizer (342) to rotate counterclockwise in the purification crucible (24), and introducing a cooling medium into the purification crystallizer (342) through the cold air inlet pipe (343); after the purification crystallizer (342) is cooled, the high-purity aluminum liquid gradually accumulates around the purification crystallizer (342) during the rotation process to form an inverted mushroom-shaped crystal; S4, when the set segregation time is reached and the high-purity aluminum ingot segregated in the first stage reaches a specified size, the cooling medium is stopped from being introduced into the cold air inlet pipe (343), the rotation of the purification crystallizer (342) is stopped, the lifting module (31) is started, and the two purification modules (34) are driven to be lifted synchronously, and the high-purity aluminum ingot is taken out of the purification crucible (24), and then the first rotating module (32) drives the purification support (33) to rotate 180 degrees, so that the positions of the two purification modules (34) are interchanged, and then the lifting module (31) drives the two purification modules (34) to descend, so as to realize the control of the two purification modules (34) to switch between the purification station and the ingot removal station; S5, start the stripping mechanism (4), the stripping drive unit (43) drives the stripping pressing plate (44) to move downward, separate the high-purity aluminum ingot from the purification crystallizer (342), and drop it into the ingot receiving transfer vehicle (42) below. After the temperature of the purification crystallizer (342) drops to 100-150° C., start the spraying module (45) to spray a non-stick aluminum coating onto the surface of the purification crystallizer (342).

9. A method for producing high purity aluminum according to claim 8, characterized in that: In step S1, when the liquid level measuring module (111) detects that the aluminum liquid level in the heating crucible (103) is 10 to 20 cm higher than the upper edge of the first aluminum liquid channel (26), the first electrically controlled valve (106) is closed.

10. A method for producing high purity aluminum according to claim 8, characterized in that: In step S5, the material of the non-stick aluminum coating is aluminum oxide or boron nitride, and the thickness of the non-stick aluminum coating is 0.5-2.5 mm.

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