Dynamic regulation and control method for aluminum melt refiner

Abstract

The invention provides an aluminum melt refiner dynamic regulation and control method which comprises the following steps: preparing a 1060 aluminum alloy raw material, and preheating to 220 DEG C; the preparation method comprises the following steps: adding raw materials into a smelting furnace, heating to 740 DEG C for melting, and adding an Al-5Ti-1B intermediate alloy; adding a refining agent, refining for 35 minutes, and standing for 20 minutes; the melt enters a degassing box, in the degassing box, a graphite rotor is used for rotating at the rotating speed of 350 rpm, and high-purity argon is introduced for degassing for 18 minutes; the melt is filtered through a ceramic foam filter and enters a front box; the temperature in the front box is adjusted to 690 DEG C, and a titanium wire adding device continuously adds titanium wires at the speed of 0.8 m / min; the melt enters a casting and rolling machine, casting and rolling are conducted at the speed of 1.0 m / min, and the liquid level height is controlled to be 60 mm; graphite-based paint is sprayed on the surface of the casting roller at the speed of 0.8 m / min; and performing macrostructure inspection on the cast-rolled plate, and evaluating the grain refinement effect. The method has the effects of stable grain refinement effect and high finished product quality.

Description

Technical Field

[0001] This invention relates to a method for dynamically controlling aluminum melt refiner. Background Technology

[0002] In the casting and rolling process of aluminum and aluminum alloys, grain refinement is a key step in ensuring material properties. Currently, the industry commonly uses Al-Ti-B master alloys as grain refiners, adding titanium to promote nucleation and achieve grain refinement.

[0003] However, in actual production, it has been found that even with the addition of grain refiners, coarse grain defects still easily occur. These defects are difficult to eliminate during subsequent cold rolling processes, especially in products such as power battery explosion-proof cover materials that are not homogenized, ultimately leading to quality problems such as uneven grain size and orange peel texture in the finished product. While the role of titanium in grain refinement is recognized in existing technologies, there is a lack of systematic research on the key parameter of titanium wire addition rate, resulting in unstable refining effects and an inability to effectively control grain size uniformity. Furthermore, factors such as melt overheating, excessive temperature gradients at the crystallization front, and improper liquid level control can also exacerbate the coarse grain problem.

[0004] Specifically, the following issues may arise: inaccurate temperature control during smelting can affect the dissolution of intermediate alloys; improper refining process parameters can lead to insufficient melt purity; poor degassing can increase the hydrogen content of the melt; unreasonable filtration system parameters can introduce secondary inclusions; excessive temperature fluctuations in the front chamber can affect the uniform distribution of titanium; mismatched casting and rolling process parameters can lead to uneven crystallization; and improper roller coating processes can affect the surface quality of cast and rolled plates.

[0005] These problems collectively restrict the grain refinement effect and finished product quality of 1060 aluminum alloy cast and rolled products, and existing technologies urgently need to be improved to address these issues. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a method for dynamic control of aluminum melt refiner, which has the effects of stable grain refinement and high product quality. This objective is achieved as follows:

[0007] This invention proposes a method for dynamically controlling an aluminum melt refiner, comprising: preparing 1060 aluminum alloy raw material and preheating it to 220°C; adding the raw material to a melting furnace and heating it to 740°C for melting, then adding an Al-5Ti-1B master alloy; adding a refining agent and refining for 35 minutes, followed by standing for 20 minutes; the melt entering a degassing box, where a graphite rotor is rotated at 350 rpm and high-purity argon gas is introduced for degassing for 18 minutes; the melt being filtered through a ceramic foam filter and entering a pre-heating chamber; adjusting the temperature in the pre-heating chamber to 690°C, and continuously adding titanium wire at a speed of 0.8 m / min using a titanium wire adding device; the melt entering a casting and rolling mill and being cast and rolled at a speed of 1.0 m / min, with the liquid level controlled at 60 mm; spraying a graphite-based coating onto the surface of the casting and rolling rolls at a speed of 0.8 m / min; and performing a low-magnification microstructure inspection on the cast and rolled plate to evaluate the grain refinement effect.

[0008] Furthermore, the step of adding the raw materials to the melting furnace and heating them to 740°C for melting, and adding the Al-5Ti-1B master alloy includes: the melting furnace is a resistance heating method with a heating rate of 50°C / h; when the temperature reaches 740°C, the Al-5Ti-1B master alloy is added as a grain refiner; the melt temperature is controlled within the range of 730-750°C; electromagnetic stirring is used during the melting process with a stirring frequency of 15Hz; and the melting time is controlled within 2-3 hours.

[0009] Furthermore, the addition of the refining agent, refining for 35 minutes, and standing for 20 minutes includes: using a NaCl-KCl-Na3AlF6 composite refining agent, with the amount of refining agent added being 0.3-0.5% of the melt weight, and the refining temperature controlled at 730℃.

[0010] Furthermore, the melt enters a degassing chamber, where a graphite rotor is rotated at 350 rpm, and high-purity argon gas is introduced for degassing for 18 minutes, including: the degassing chamber temperature is controlled at 710℃, high-purity argon gas is used as the degassing medium with a purity ≥99.99%, the degassing time is 15-20 minutes, and the argon gas flow rate is 15-20 L / min; after degassing, the hydrogen content of the melt is controlled below 0.12 ml / 100 g.

[0011] Furthermore, the melt is filtered through a ceramic foam filter before entering the pre-filter chamber, which includes: the filter chamber temperature is controlled at 700℃, a 30ppi alumina ceramic foam filter is used, the filtration speed is 5-8kg / cm²·min, and the filtration pressure difference is controlled at 0.01-0.02MPa.

[0012] Furthermore, the step of adjusting the temperature to 690°C in the front chamber and continuously adding titanium wire at a speed of 0.8 m / min includes: controlling temperature fluctuations within ±5°C and the melt residence time in the front chamber being 5-8 minutes.

[0013] Furthermore, the melt enters the casting and rolling mill and is cast and rolled at a speed of 1.0 m / min, with the liquid level controlled at 60 mm, including: a casting and rolling zone length of 50 mm, a rolling force controlled at 800-1000 kN, and a cooling water flow rate of 20 m³ / min for the casting and rolling rolls. 3 / h.

[0014] Furthermore, the process of spraying graphite-based coating onto the surface of the casting roll at a speed of 0.8 m / min includes: controlling the spraying speed at 0.8 m / min, the spraying distance at 200 mm, the spraying pressure at 0.3 MPa, and the spraying thickness at 10-15 μm.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: by precisely controlling each process parameter, the problem of unstable grain refinement effect in aluminum casting and rolling is solved. Among them, the pretreatment processes such as preheating, melting, refining, degassing and filtration provide pure melt conditions for subsequent casting and rolling. The continuous addition of titanium wire and precise speed control ensure the uniform distribution and effective action of grain refiner. The optimized combination of casting and rolling parameters forms stable solidification conditions, which is conducive to obtaining fine and uniform grain structure, realizing stable control of grain size and avoiding the generation of coarse grain defects. Attached Figure Description

[0016] Figure 1 This is a flowchart illustrating a method for dynamically controlling aluminum melt refiners. Detailed Implementation

[0017] To enhance understanding of the present invention, the present invention will be further described in detail below with reference to embodiments and accompanying drawings. These embodiments are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention.

[0018] Please refer to Figure 1 This application proposes a method for dynamically controlling an aluminum melt refiner, comprising: S1, preparing 1060 aluminum alloy raw material and preheating it to 220℃; S2, adding the raw material to a melting furnace, heating it to 740℃ to melt it, and adding an Al-5Ti-1B master alloy; S3, adding a refining agent, refining for 35 minutes, and letting it stand for 20 minutes; S4, the melt enters a degassing box, in which a graphite rotor is rotated at 350 rpm, and high-purity argon gas is introduced for degassing for 18 minutes. S5. The melt is filtered through a ceramic foam filter and enters the front chamber; S6. The temperature in the front chamber is adjusted to 690℃, and titanium wire is continuously added at a speed of 0.8m / min by the titanium wire adding device; S7. The melt enters the casting and rolling mill and is cast and rolled at a speed of 1.0m / min, with the liquid level controlled at 60mm; S8. Graphite-based coating is sprayed onto the surface of the casting and rolling roll at a speed of 0.8m / min; S9. The casting and rolling plate is inspected at low magnification to evaluate the grain refinement effect.

[0019] This method solves the problem of unstable grain refinement during aluminum casting and rolling by precisely controlling various process parameters. The pretreatment processes, such as preheating, melting, refining, degassing, and filtration, provide pure melt conditions for subsequent casting and rolling. The continuous addition of titanium wire and precise speed control ensure the uniform distribution and effective action of the grain refiner. The optimized combination of casting and rolling parameters forms stable solidification conditions, which is conducive to obtaining fine and uniform grain structure. Compared with the existing technology, this method achieves stable control of grain size by systematically controlling each process link, especially the key parameter of titanium wire addition speed, thus avoiding the generation of coarse grain defects.

[0020] Furthermore, this application also proposes that the melting furnace adopts resistance heating, the heating rate is set to 50℃ / h, and when the temperature reaches 740℃, Al-5Ti-1B master alloy is added as a grain refiner. The melt temperature is controlled in the range of 730-750℃. Electromagnetic stirring is used during the melting process, the stirring frequency is 15Hz, and the melting time is controlled in 2-3 hours.

[0021] As an example, resistance heating generates heat by passing an electric current through a resistance element, achieving uniform heating of the melting furnace. A heating rate of 50℃ / h prevents localized overheating of the melt and ensures temperature uniformity. The Al-5Ti-1B master alloy, acting as a grain refiner, effectively dissolves and distributes uniformly within the 730-750℃ range. Electromagnetic stirring induces a current in the melt through an alternating magnetic field, creating an electromagnetic force that drives the melt flow. A stirring frequency of 15Hz ensures thorough mixing without excessive turbulence. A melting time of 2-3 hours ensures sufficient diffusion and homogenization of alloying elements.

[0022] In a preferred embodiment, the resistance heating element can be made of nickel-chromium alloy or silicon carbide rod, arranged on the side wall and bottom of the melting furnace. Temperature control is achieved through real-time monitoring by thermocouples and precise temperature control using a PID control system. The electromagnetic stirring device can be driven by a three-phase low-frequency power supply, and the stirrer is installed at the bottom of the melting furnace. The melting time is dynamically adjusted according to the raw material composition and melt state.

[0023] Furthermore, this application also proposes that, during the low-grain casting and rolling process of 1060 aluminum alloy, a NaCl-KCl-Na3AlF6 composite refining agent is used for refining treatment. The amount of refining agent added is 0.3-0.5% of the melt weight, the refining temperature is controlled at 730℃, the refining time is 35 minutes, and then it is allowed to stand for 20 minutes.

[0024] As an example, the NaCl-KCl-Na3AlF6 composite refining agent is composed of sodium chloride, potassium chloride, and sodium fluoroaluminate. The proportions of each component can be adjusted according to actual needs. As a preferred embodiment, the mass ratio of NaCl, KCl, and Na3AlF6 can be controlled within the range of 4:4:2 to 3:3:4. The refining agent can be added in batches or continuously. Batch addition can better control the refining effect. During the refining process, maintaining the melt temperature at 730℃ is conducive to the full effect of the refining agent, while avoiding excessively high temperatures that could lead to increased energy consumption or melt oxidation. After refining, letting it stand for 20 minutes allows the inclusions to float to the surface, facilitating subsequent degassing.

[0025] Therefore, by using a composite refining agent with specific components and controlling the refining parameters, gases and inclusions in the melt can be effectively removed, providing a pure melt for subsequent casting and rolling processes. Compared with single-component refining agents, the NaCl-KCl-Na3AlF6 composite refining agent has better refining effect and more stable performance, and can adapt to the fluctuations of different batches of raw materials. At the same time, the selection of refining temperature and time not only ensures the refining effect, but also avoids the increase in energy consumption and melt contamination caused by over-refining. This technical solution solves the problems of unstable refining effect and insufficient melt purity in the existing technology, laying the foundation for obtaining a fine and uniform grain structure.

[0026] Therefore, this technical solution solves the problems of uneven distribution of grain refiner and large temperature fluctuations in the melt during the traditional melting process by precisely controlling the melting temperature, stirring parameters and time. Compared with the existing technology, the use of resistance heating combined with electromagnetic stirring can achieve a more uniform temperature field and composition distribution, avoid grain coarsening caused by local overheating, and provide uniform composition and stable temperature melt conditions for the subsequent casting and rolling process.

[0027] Furthermore, this application proposes that, in a degassing chamber, a graphite rotor is used to rotate at 350 rpm, and high-purity argon gas is introduced for degassing for 18 minutes. The temperature of the degassing chamber is controlled at 710℃, high-purity argon gas is used as the degassing medium with a purity ≥99.99%, the degassing time is 15-20 minutes, and the argon gas flow rate is 15-20 L / min; after degassing, the hydrogen content of the melt is controlled below 0.12 ml / 100g.

[0028] As an example, the rotational speed range of the graphite rotor can preferably be 300-400 rpm. Adjusting the rotational speed can optimize the bubble breaking effect. The purity requirement of high-purity argon gas can be further limited to ≥99.995% to ensure better degassing. The degassing time can be adjusted to within 15-20 minutes depending on the melt volume. The argon flow rate and degassing time must be matched; for example, when the flow rate is 20 L / min, the degassing time can be shortened to 15 minutes. The temperature control of the degassing chamber can adopt a zoned heating method to ensure temperature uniformity within ±5℃. Hydrogen content can be detected online using the Telegas method or the first bubble method.

[0029] Therefore, this technical solution effectively reduces the hydrogen content in the melt by precisely controlling parameters such as degassing temperature, gas purity, processing time, and flow rate. Temperature control avoids grain coarsening caused by melt overheating, high-purity argon ensures degassing efficiency, and optimized processing time and flow rate ensure sufficient degassing while avoiding over-processing. Compared with conventional degassing processes, this solution stably controls the hydrogen content below 0.12 ml / 100 g, significantly reducing the generation of porosity defects during casting and rolling, and providing cleaner melt conditions for subsequent grain refinement.

[0030] Furthermore, this application also proposes that the melt is filtered through a ceramic foam filter before entering the pre-filter chamber, including: the filter chamber temperature is controlled at 700℃, a 30ppi alumina ceramic foam filter is used, the filtration speed is 5-8kg / cm²·min, and the filtration pressure difference is controlled at 0.01-0.02MPa.

[0031] As an example, the alumina ceramic foam filter uses a 30ppi specification. The uniformity of its pore size distribution directly affects the filtration effect. When the filtration speed is set to 5-8 kg / cm²·min, production efficiency and filtration quality can be balanced. The filtration pressure difference is achieved by adjusting the melt flow rate and filter resistance. A pressure difference range of 0.01-0.02 MPa can effectively intercept inclusions without causing melt retention. As a preferred implementation, the filter box adopts a double-layer insulation structure, and the temperature control accuracy can reach ±3℃. As a result, the melt viscosity remains stable during the filtration process, avoiding abnormal filtration speed due to temperature fluctuations. For example, when a filtration speed of 7 kg / cm²·min is used, the measured inclusion removal rate reaches over 92%.

[0032] This technical solution addresses the challenge of effectively removing minute inclusions from molten aluminum by precisely controlling three key parameters: filtration temperature, speed, and differential pressure. A constant filtration temperature ensures melt flowability, an optimized filtration speed guarantees processing efficiency, and a reasonable differential pressure range balances filtration effectiveness with equipment load. Compared to conventional single-parameter control methods, this solution increases the purity of the filtered melt by approximately 15%, providing cleaner melt conditions for subsequent casting and rolling processes. Furthermore, the use of standardized PPI filters enhances the repeatability and scalability of the process parameters.

[0033] Furthermore, this application also proposes that the temperature in the front chamber be adjusted to 690°C, and the titanium wire adding device continuously adds titanium wire at a speed of 0.8 m / min, including: temperature fluctuation controlled within ±5°C, and the melt residence time in the front chamber being 5-8 minutes.

[0034] As an example, temperature fluctuations are controlled within ±5℃ through a front chamber temperature control system. This system employs a PID control algorithm, combined with thermocouples to monitor the melt temperature in real time. The titanium wire addition speed of 0.8 m / min is achieved through a servo motor-driven wire feeding mechanism, with the feeding speed error controlled within ±0.05 m / min. The melt residence time of 5-8 minutes is determined through matching calculations between the front chamber volume and the melt flow rate, where the front chamber volume is designed as the product of the melt flow rate and the residence time. As a preferred implementation, temperature control can employ a zoned heating method, arranging heating elements at different locations within the front chamber and achieving uniform heating through independent temperature control modules. The titanium wire addition device can be equipped with a tension sensor to monitor changes in titanium wire tension in real time, ensuring wire feeding stability.

[0035] Therefore, this technical solution solves the problem of unstable grain refinement caused by uneven titanium distribution in existing technologies by precisely controlling the temperature fluctuation of the pre-box and the titanium wire addition rate. Temperature fluctuations controlled within ±5℃ avoid localized overcooling or overheating of the melt, ensuring uniform diffusion of titanium in the melt. The titanium wire addition rate of 0.8 m / min, experimentally verified, achieves the optimal release rate of titanium, avoiding both agglomeration due to excessively rapid addition and insufficient refiner due to excessively slow addition. The designed melt residence time of 5-8 minutes ensures sufficient contact and reaction between titanium and the melt, forming effective heterogeneous nucleation cores. Compared with existing technologies, this solution significantly improves the stability and uniformity of grain refinement by quantitatively controlling key parameters, providing uniform melt conditions for subsequent casting and rolling processes.

[0036] Furthermore, this application also proposes that the molten metal enters the casting and rolling mill and is cast and rolled at a speed of 1.0 m / min, with the liquid level height controlled at 60 mm, including: a casting and rolling zone length of 50 mm, a rolling force controlled at 800-1000 kN, and a cooling water flow rate of 20 m³ / min for the casting and rolling rolls. 3 / h. Spraying graphite-based coatings onto the surface of the casting roll at a speed of 0.8 m / min includes: spraying speed controlled at 0.8 m / min, spraying distance of 200 mm, spraying pressure of 0.3 MPa, and spraying thickness of 10-15 μm.

[0037] As an example, the length of the casting-rolling zone is set to 50 mm. This parameter directly affects grain nucleation and growth conditions by limiting the interaction area between metal solidification and rolling deformation. The rolling force is controlled within the range of 800-1000 kN. This force range has been experimentally verified to ensure the surface quality and internal microstructure uniformity of the cast-rolled strip. The cooling water flow rate of the casting rolls is set to 20 m³ / h. 3 The flow rate of [flow rate] / h effectively maintains the temperature stability of the roller surface, preventing abnormal grain growth due to localized overheating. In the spraying parameters, a spraying distance of 200mm combined with a pressure of 0.3MPa can form a uniform 10-15μm graphite coating. This coating thickness ensures effective demolding without compromising heat transfer efficiency due to excessive thickness. As a preferred embodiment, the spraying system can employ a reciprocating robotic arm to achieve a uniform speed of 0.8m / min, ensuring coating uniformity.

[0038] Therefore, this technical solution solves the problem of uneven grain size caused by liquid level fluctuations and unstable roll surface conditions in existing technologies by precisely controlling the synergistic effect of casting and rolling process parameters and roll surface treatment conditions. Specifically, the combination of a constant liquid level height and casting and rolling speed maintains a stable melt solidification front, the 50mm casting and rolling zone length provides sufficient nucleation time, and optimized rolling force and cooling conditions suppress abnormal grain growth. Compared with conventional processes, this solution, through quantitative control of spraying parameters, maintains stable heat conduction performance of the roll surface, thereby significantly improving the reproducibility of grain refinement effects, and is particularly suitable for thin strip casting and rolling production with strict requirements for grain uniformity.

[0039] Furthermore, this application also proposes that a graphite-based coating be sprayed onto the surface of the casting roll at a speed of 0.8 m / min, wherein the spraying speed is controlled at 0.8 m / min, the spraying distance is 200 mm, the spraying pressure is 0.3 MPa, and the spraying thickness is 10-15 μm.

[0040] As an example, the spraying speed is precisely controlled by a servo motor-driven metering pump, with speed fluctuations not exceeding ±0.05 m / min. The spraying distance is monitored in real time by a laser rangefinder, which provides feedback to adjust the position of the robotic arm. The spraying pressure is controlled by a proportional valve, and the pressure sensor is calibrated in real time to ensure that the pressure remains stable within the set value of ±0.01 MPa. The spraying thickness is achieved by adjusting the solid content of the coating and the number of sprays, and is detected online using an eddy current thickness gauge. As a preferred embodiment, the graphite-based coating consists of 80 wt% flake graphite, 15 wt% sodium silicate binder, and 5 wt% dispersant, with the coating viscosity controlled at 25-30 s (Ford Cup 4).

[0041] Therefore, this technical solution effectively solves the problems of aluminum adhesion and uneven heat transfer on the roll surface during the casting and rolling process by precisely controlling the spraying parameters. Specifically, a constant spraying speed ensures coating uniformity, optimized spraying distance avoids paint splattering, precise pressure control ensures effective paint atomization, and the specified thickness range isolates the melt without affecting heat conduction. Compared with existing technologies, this solution, through synergistic parameter control, keeps the coating stable under high-temperature conditions, thereby reducing surface defects in the cast and rolled plate and improving the uniformity of the grain structure. Specifically, the coating thickness deviation is reduced from ±5μm in conventional processes to ±2μm, the surface roughness Ra value of the cast and rolled plate is reduced from 1.2μm to 0.8μm, and the standard deviation of grain size is reduced from the conventional 15% to 8%.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A method for dynamically controlling an aluminum melt refiner, characterized in that, The process includes preparing 1060 aluminum alloy raw material and preheating it to 220℃; adding the raw material to a melting furnace and heating it to 740℃ to melt it, then adding Al-5Ti-1B master alloy; adding refining agent and refining for 35 minutes, followed by standing for 20 minutes; the melt entering a degassing box, where a graphite rotor is rotated at 350 rpm and high-purity argon gas is introduced for degassing for 18 minutes; the melt being filtered through a ceramic foam filter and entering the front chamber; adjusting the temperature in the front chamber to 690℃, and continuously adding titanium wire at a speed of 0.8 m / min using a titanium wire adding device; the melt entering a casting and rolling mill and being cast and rolled at a speed of 1.0 m / min, with the liquid level controlled at 60 mm; spraying graphite-based coating onto the surface of the casting and rolling rolls at a speed of 0.8 m / min; and performing low-magnification microstructure inspection on the cast and rolled plate to evaluate the grain refinement effect.

2. The method for dynamically controlling an aluminum melt refiner according to claim 1, characterized in that, The process of adding raw materials to a melting furnace and heating them to 740°C for melting, and adding Al-5Ti-1B master alloy includes: the melting furnace is a resistance heating method with a heating rate of 50°C / h; when the temperature reaches 740°C, Al-5Ti-1B master alloy is added as a grain refiner; the melt temperature is controlled within the range of 730-750°C; electromagnetic stirring is used during the melting process with a stirring frequency of 15Hz; and the melting time is controlled within 2-3 hours.

3. The method for dynamically controlling an aluminum melt refiner according to claim 1, characterized in that, The process of adding refining agent, refining for 35 minutes, and letting stand for 20 minutes includes: using a NaCl-KCl-Na3AlF6 composite refining agent, with the amount of refining agent added being 0.3-0.5% of the melt weight, and the refining temperature controlled at 730℃.

4. The method for dynamically controlling an aluminum melt refiner according to claim 1, characterized in that, The melt enters a degassing chamber, where a graphite rotor is rotated at 350 rpm and high-purity argon gas is introduced for degassing for 18 minutes. This includes: the degassing chamber temperature is controlled at 710℃, high-purity argon gas is used as the degassing medium with a purity ≥99.99%, the degassing time is 15-20 minutes, and the argon gas flow rate is 15-20 L / min; after degassing, the hydrogen content of the melt is controlled below 0.12 ml / 100 g.

5. The method for dynamically controlling an aluminum melt refiner according to claim 1, characterized in that, The melt is filtered through a ceramic foam filter and enters the pre-filter chamber, which includes: a filter chamber temperature controlled at 700℃, a 30ppi alumina ceramic foam filter, a filtration speed of 5-8kg / cm²·min, and a filtration pressure differential controlled at 0.01-0.02MPa.

6. The method for dynamically controlling an aluminum melt refiner according to claim 1, characterized in that, The process of adjusting the temperature to 690°C in the front chamber and continuously adding titanium wire at a speed of 0.8 m / min includes: controlling temperature fluctuations within ±5°C and maintaining the melt in the front chamber for 5-8 minutes.

7. The method for dynamically controlling an aluminum melt refiner according to claim 1, characterized in that, The molten material enters the casting and rolling mill and is cast and rolled at a speed of 1.0 m / min, with the liquid level controlled at 60 mm. This includes: a casting and rolling zone length of 50 mm, rolling force controlled at 800-1000 kN, and a cooling water flow rate of 20 m³ / min for the casting and rolling rolls. 3 / h.

8. The method for dynamically controlling an aluminum melt refiner according to claim 1, characterized in that, The process of spraying graphite-based coating onto the surface of the casting roll at a speed of 0.8 m / min includes: controlling the spraying speed at 0.8 m / min, the spraying distance at 200 mm, the spraying pressure at 0.3 MPa, and the spraying thickness at 10-15 μm.

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