Low-carbon environment-friendly method for producing high-strength 8006 alloy container foil

Abstract

The invention belongs to the technical field of aluminum alloy production, and particularly discloses a low-carbon environment-friendly method for producing a high-strength 8006 alloy container foil, aluminum alloy component proportion and melt treatment and cold rolling production processes are optimized, a large amount of regenerated aluminum waste can be digested, energy consumption is lower than that of a primary aluminum ingot by 50% or above, a blank with the thickness of 1.5 mm is produced through triple continuous rolling, and the production cost is low. The container foil finished product is rolled through 4-5 passes of cold foil rolling, compared with a conventional scheme, the rolling passes are reduced by 2-3, the machining cost is saved by 500 yuan / ton, the blank thickness can be reduced through the production scheme, the cold foil rolling production passes are reduced, high-temperature intermediate annealing is not needed in the cold rolling production process, about 280 kw.h annealing power consumption is saved for each ton, low-carbon short-process production is achieved, and the production cost is reduced. The tensile strength of the finished product is larger than or equal to 150 MPa, the ductility is larger than or equal to 18%, the tensile strength is about 20 MPa higher than that of container foil produced through a conventional scheme, deformation is not likely to happen after punching forming, and the terminal use effect is better.

Description

Technical Field

[0001] This invention belongs to the field of aluminum alloy production technology, and specifically discloses a method for producing high-strength 8006 alloy container foil in a low-carbon and environmentally friendly manner. Background Technology

[0002] With the continued implementation of the national plastic restriction policy and increasing public concern about food hygiene and safety, aluminum foil lunch boxes, as a green packaging material, are becoming the best choice for the catering and food packaging industries. However, due to the high price of aluminum, the cost pressure of using aluminum foil lunch boxes is also increasing. Thinning aluminum foil lunch boxes has become the best solution to reduce costs, but thinning means weaker resistance to deformation, resulting in a poorer user experience. Currently, the container foils on the market are mainly hot-rolled 3004 alloy and cast-rolled 3003, 8011, and 8006 alloys. Among them, hot-rolled 3004 alloy container foil has a higher production cost, while cast-rolled 3003, 8011, and 8006 alloy container foil has lower strength.

[0003] Against this backdrop, manufacturing thinner, more deformation-resistant lunch boxes becomes a viable solution. Chinese patent CN116426794B uses a continuous casting and rolling process to produce 8006 alloy container foil, resulting in foil thicknesses of 0.125–0.16 mm and tensile strengths of 110–140 MPa. This method requires a high-temperature annealing process during foil production, resulting in a thicker finished product with relatively soft mechanical properties. This fails to meet the demand for thinner, more deformation-resistant lunch boxes, hindering market adoption. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies, this invention discloses a low-carbon and environmentally friendly method for producing high-strength 8006 alloy container foil. The method uses continuous casting to produce 8006 alloy billets, and then uses three-rolling to produce 1.5mm thick billets. In the cold foil rolling process, a new process flow that differs from the traditional process is used to produce high-strength container foil products. This reduces the thickness of the billet, optimizes the cold rolling production process, reduces the number of cold foil rolling production passes, and eliminates the need for high-temperature intermediate annealing, thus achieving low-carbon and short-process production.

[0005] To achieve the above-mentioned objectives, the present invention adopts the following technical solution: A method for producing high-strength 8006 alloy container foil in a low-carbon and environmentally friendly manner includes the following steps: S1. Smelting: 75%–85% recycled aluminum scrap and 15%–25% molten electrolytic aluminum are placed in a smelting furnace for remelting to prepare molten aluminum. After melting, an original sample is taken for testing. Based on the test results, iron, titanium, and manganese additives are added to adjust the alloy composition to meet the requirements. The mass percentages of each component are as follows: Si: ≤0.3%, Fe: 1.3-1.6%, Cu: ≤0.02%, Mn: 0.3-1.0%, Mg≤0.02%, Zn≤0.02%, Ti 0.02%-0.03%, total impurity elements ≤0.03%, balance is aluminum. After adding iron agent, quick-dissolving silicon and titanium agent, ensure that the melt is stirred fully. Use a refining machine for primary refining and local stirring. After primary refining, take samples for testing. After the composition is qualified, carry out secondary refining. Only argon gas is introduced as the refining gas for secondary refining. After secondary refining, let stand for 10 minutes and then perform slag removal. After slag removal, let stand for 30-40 minutes and then start the furnace. The furnace start-up temperature is 715-725℃. S2. Online treatment of melt: After the furnace is started, the aluminum melt flows smoothly into the guide trough. Aluminum titanium boron wire is added to the aluminum melt at a uniform speed to purify the aluminum melt. After purification, the aluminum melt enters the degassing box and plate filter box in sequence for degassing and filtration. After degassing and filtration, the aluminum melt flows directly into the front box. S3, Continuous casting: The temperature of the front box is 685℃~695℃. The aluminum melt in the front box flows into the casting cavity of the casting machine through the casting nozzle. The aluminum melt solidifies in the casting cavity to form a billet and then exits the plate. The casting speed is 7.2~8.0m / min and the billet thickness is 19mm. S4. Continuous rolling: The billet enters the three-stand rolling mill for rolling. The billet exit thickness of the first stand of the three-stand rolling mill is 7.0-8.0 mm, the billet exit thickness of the second stand of the three-stand rolling mill is 3.0-4.0 mm, and the billet exit thickness of the third stand of the three-stand rolling mill is 1.5-2.0 mm. The billet exiting the third stand of the three-stand rolling mill is coiled into a coil. S5. Cold Foil Rolling: 1.5-2.0mm thick aluminum coils are directly rolled in 3 passes on a cold rolling mill. The processing rate of each cold rolling pass is 45% to 55%. After the cold-rolled strip is trimmed, it is cold-rolled in 1 to 2 passes at a processing rate of 50% to 55% to produce finished aluminum foil. S6. Finished product annealing: The finished aluminum foil roll is placed in an annealing furnace for finished product annealing. The temperature is uniformly raised to 200℃ within 2 hours and held under negative pressure for 4 hours. Then, the temperature is uniformly raised to 295℃ within 2 hours and held under positive pressure for 25-35 hours. Then, the furnace temperature is lowered to 170℃ and the aluminum foil is removed from the furnace and allowed to cool naturally to room temperature. The tensile strength of the finished aluminum foil is tested to be 140MPa~60MPa and the elongation is ≥18%.

[0006] Furthermore, in the method for producing high-strength 8006 alloy container foil in a low-carbon and environmentally friendly manner, in step S1, recycled aluminum waste is added first, followed by electrolytic aluminum liquid. The electrolytic aluminum liquid can promote the melting of recycled aluminum waste, and the flow of aluminum liquid can also play a role in uniformizing the composition.

[0007] Furthermore, in the method for producing high-strength 8006 alloy container foil in a low-carbon and environmentally friendly manner, in step S1, the primary refining and secondary refining times are 30-40 min, the graphite rotor speed of the refining machine is set to 500-600 r / min, and the refining gas pressure for secondary refining is 0.4-0.6 MPa.

[0008] Furthermore, in the method for producing high-strength 8006 alloy container foil in a low-carbon and environmentally friendly manner, in step S2, argon gas is introduced into the degassing box for online degassing. The degassing box adopts a three-rotor degassing method to ensure the degassing effect. The rotation speed of the degassing box rotor is 450-550 rpm, the rotor is immersed in the aluminum liquid to a height of more than 80 cm, and the furnace gas temperature of the plate filter box is 735℃-745℃.

[0009] Furthermore, in the method for producing high-strength 8006 alloy container foil in a low-carbon and environmentally friendly manner, in step S2, aluminum-titanium-boron wire is added at a uniform rate of 3.0±1m / min.

[0010] Furthermore, in the method for producing high-strength 8006 alloy container foil in a low-carbon and environmentally friendly manner, the temperature of the aluminum strip metal plate at the exit of the third stand of the three-stand rolling mill is 200-230°C in step S4.

[0011] Furthermore, in the method for producing high-strength 8006 alloy container foil in a low-carbon and environmentally friendly manner, in step S4, all three stands of the three-stand rolling mill need to be cooled and lubricated with emulsion during the three-stand rolling process, and the emulsion concentration is 3.5±0.1%.

[0012] Furthermore, in the method for producing high-strength 8006 alloy container foil in a low-carbon and environmentally friendly manner, in step S5, the edge quality is strictly controlled during edge cutting, and problems such as layering and poor tower-shaped edge cutting are not allowed.

[0013] Furthermore, in the method for producing high-strength 8006 alloy container foil in a low-carbon and environmentally friendly manner, in step S6, the temperature difference between the metals in each heating zone of the annealing furnace during the annealing of the finished product is ≤2℃.

[0014] Due to the adoption of the above technical solution, the present invention has the following advantages: This invention discloses a low-carbon and environmentally friendly method for producing high-strength 8006 alloy container foil. It utilizes a continuous casting and rolling process to produce 8006 alloy billets, optimizing the aluminum alloy composition ratio, melt treatment, and cold rolling production process. This method can significantly utilize recycled aluminum waste, reducing energy consumption by more than 50% compared to primary aluminum ingots. A 1.5mm thick billet is produced through three continuous rolling processes, followed by 4-5 passes of cold foil rolling to produce the finished container foil. This reduces rolling passes by 2-3 compared to conventional methods, saving processing costs of 500 yuan / ton. This production method allows for thinner billet thickness and fewer cold foil rolling passes. High-temperature intermediate annealing is not required during the cold rolling process, saving approximately 280 kW*h of annealing electricity per ton. This achieves low-carbon, short-process production. The finished product of this invention has a tensile strength ≥150MPa and an elongation ≥18%, which is about 20MPa higher than that of container foil produced by conventional methods. It is also less prone to deformation after stamping, resulting in better end-use performance. Detailed Implementation

[0015] The present invention will be further explained and illustrated below with reference to embodiments. However, this should not be construed as limiting the scope of protection of the present invention. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. Example 1

[0016] A method for producing high-strength 8006 alloy container foil in a low-carbon and environmentally friendly manner, comprising the following steps: S1. Smelting: 76.6% recycled aluminum scrap and 23.4% molten electrolytic aluminum are sequentially added to a smelting furnace for remelting to prepare molten aluminum. The single furnace charge is 108.2t. After melting, an original sample is taken for testing. Based on the test results, iron, titanium, and manganese additives are added to adjust the alloy composition to meet the requirements. The mass percentages of each component are: Si: 0.21%, Fe: 1.36%, Cu: 0.012%, Mn: 0.68%, Mg: 0.017%, Zn: 0.018%, Ti: 0.023%, with a total impurity element content ≤0.03%, and the balance being aluminum. After adding iron, quick-dissolving silicon, and titanium additives, electromagnetic stirring is turned on to ensure thorough stirring of the melt. To avoid alloy composition enrichment and segregation, an HD2000 refining machine was used for initial refining and local stirring. The initial refining time was 32 minutes, and the graphite rotor speed of the HD2000 refining machine was 520 r / min. After the initial refining, samples were taken for composition analysis. After the composition was qualified, a second refining was carried out. Only argon gas was introduced as the refining gas for the second refining, with a gas pressure of 0.45 MPa and a refining time of 310 minutes. After refining, the mixture was allowed to stand for 10 minutes, and a slag removal vehicle was used to remove slag to ensure that slag with a surface area greater than 20 mm × 20 mm of aluminum molten liquid was completely removed. After slag removal, the mixture was allowed to stand for 32 minutes before starting production at a furnace temperature of 718℃. S2. Online Melt Treatment: After the furnace is started, the aluminum melt flows smoothly into the guide channel. Two sets of aluminum-titanium-boron wires are added to the aluminum melt at a uniform speed of 3.0±1m / min. The aluminum melt with aluminum-titanium-boron wires added flows into the degassing box. Argon gas is introduced into the degassing box for online degassing. The degassing box adopts a three-rotor degassing method to ensure the degassing effect. The rotation speed of the degassing box rotor is 450 rpm. The rotor is immersed in the aluminum melt to a height of more than 80cm. After degassing, the aluminum melt enters the plate filter box for filtration. The plate filter box needs to be heated and kept warm. The furnace gas temperature in the plate filter box is 738℃. The aluminum melt after degassing and filtration flows directly into the front box. S3, Continuous Casting: During continuous casting, the temperature of the front box is set to 688℃. The molten aluminum in the front box flows into the casting cavity of the casting machine through the casting nozzle. The casting cavity consists of upper and lower steel strips and side blocks. The molten aluminum solidifies in the casting cavity to form a billet. The heat of the molten aluminum can be transferred to the cooling water through the steel strip. As the upper and lower steel strips rotate in the same direction, the heat of the stably supplied molten aluminum is carried away by the cooling water to form a billet and exit the plate. The casting speed is 7.3m / min and the billet thickness is 19mm. S4. Continuous Rolling: The cast billet enters the three-stand continuous rolling mill through the pinch rolls of the mill stand for rolling. The slab exit thickness of the first stand of the three-stand continuous rolling mill is 7.8 mm, the slab exit thickness of the second stand is 3.8 mm, and the slab exit thickness of the third stand is 1.8 mm. During the three-stand continuous rolling, an emulsion with a concentration of 3.55% is required for cooling and lubrication. The slab exiting the third stand of the three-stand continuous rolling mill is coiled, and the slab temperature at the exit of the third stand is 221℃. S5. Cold Foil Rolling: 1.8mm thick aluminum coils are directly rolled in three passes on a cold rolling mill. The processing rate of each cold rolling pass is controlled at about 55%. The rolled 0.17mm thick cold-rolled strip is trimmed by a slitting machine with a trimming amount of 20-30mm on each side. The edge quality is strictly controlled during trimming, and problems such as layering and tower-shaped poor trimming are not allowed. The trimmed cold-rolled coil is rolled in one pass to a thickness of 0.082mm with a processing rate of 52%. S6. Finished Product Annealing: Place the finished aluminum foil rolls into an annealing furnace for finished product annealing. During finished product annealing, the metal temperature difference between each heating zone of the annealing furnace should be ≤2℃. The temperature is uniformly raised to 200℃ for 2 hours and held under negative pressure for 4 hours. Then, the temperature is uniformly raised to 295℃ for 2 hours and held under positive pressure for 32 hours. Then, the furnace temperature is lowered to 170℃ and the foil is removed from the furnace and allowed to cool naturally to room temperature. After annealing, the aluminum foil rolls need to be checked to ensure that the thickness and width of the aluminum foil do not exceed the required range. The surface quality should be checked to ensure that there are no defects such as grease spots, roller marks, or scratches. The end face quality should be checked to ensure that there are no defects such as burrs, folds, or impacts. The tensile strength of the finished aluminum foil is tested to be 156MPa and the elongation is 23%. The final product is packaged according to the packaging requirements for aluminum foil for containers. Example 2

[0017] A method for producing high-strength 8006 alloy container foil in a low-carbon and environmentally friendly manner, comprising the following steps: S1. Smelting: 84.3% recycled aluminum scrap and 15.7% molten electrolytic aluminum are sequentially added to a smelting furnace for remelting to prepare molten aluminum. The single furnace charge is 109.3t. After melting, an original sample is taken for testing. Based on the test results, iron, titanium, and manganese additives are added to adjust the alloy composition to meet the requirements. The mass percentages of each component are: Si: 0.18%, Fe: 1.42%, Cu: 0.019%, Mn: 0.78%, Mg: 0.018%, Zn: 0.011%, Ti: 0.026%, with a total impurity element content ≤0.03%, and the balance being aluminum. After adding iron, quick-dissolving silicon, and titanium additives, the electromagnetic stirrer is turned on to ensure thorough stirring of the melt and avoid... Alloy composition enrichment and segregation; the HD2000 refining machine was used for primary refining and local stirring. The primary refining time was set to 39 min, and the graphite rotor speed of the HD2000 was set to 550 r / min. After the primary refining, samples were taken for composition analysis. After the composition was qualified, a secondary refining was carried out. Only argon gas was introduced as the refining gas for the secondary refining, with a gas pressure of 0.52 MPa. The secondary refining time was 39 min. After the secondary refining, the mixture was allowed to stand for 10 min. A slag removal vehicle was used to remove slag to ensure that the slag with a surface area greater than 20 mm × 20 mm on the aluminum liquid was completely removed. After slag removal, the mixture was allowed to stand for 38 min before starting production. The starting temperature was 723℃. S2. Online Melt Treatment: After the furnace is started, the aluminum melt flows smoothly into the guide channel. Two sets of aluminum-titanium-boron wires are added to the aluminum melt at a uniform speed of 3.0±1m / min. The aluminum melt with aluminum-titanium-boron wires added flows into the degassing box. Argon gas is introduced into the degassing box for online degassing. The degassing box adopts a three-rotor degassing method. The rotation speed of the degassing box rotor is 550 rpm. The rotor is immersed in the aluminum melt for more than 80cm to ensure the degassing effect. After degassing, the aluminum melt enters the plate filter box for filtration. The plate filter box needs to be heated and kept warm. The furnace gas temperature in the plate filter box is 742℃. The aluminum melt after degassing and filtration flows directly into the front box. S3, Continuous Casting: During continuous casting, the temperature of the front box is set to 694℃. The molten aluminum in the front box flows into the casting cavity of the casting machine through the casting nozzle. The casting cavity consists of upper and lower steel strips and side baffles. The molten aluminum solidifies in the casting cavity to form a billet. The heat of the molten aluminum can be transferred to the cooling water through the steel strip. As the upper and lower steel strips rotate in the same direction, the heat of the stably supplied molten aluminum is carried away by the cooling water to form a billet and exit the plate. The casting speed is 7.8m / min and the billet thickness is 19mm. S4. Continuous Rolling: The cast billet enters the three-stand continuous rolling mill through the pinch rolls of the mill stand for rolling. The slab exit thickness of the first stand of the three-stand continuous rolling mill is 7.2 mm, the slab exit thickness of the second stand is 3.3 mm, and the slab exit thickness of the third stand is 1.6 mm. During the three-stand continuous rolling, an emulsion is used for cooling and lubrication. The emulsion concentration is 3.48%. The slab exiting the third stand of the three-stand continuous rolling mill is coiled, and the slab temperature at the exit of the third stand of the three-stand continuous rolling mill is 212℃. S5. Cold Foil Rolling: 1.6mm thick aluminum coils are directly rolled in three passes on a cold rolling mill. The processing rate of each cold rolling pass is controlled at about 52%. The rolled 0.18mm thick cold-rolled strip is trimmed by a slitting machine with a trimming amount of 20-30mm on each side. The edge quality is strictly controlled during trimming, and problems such as layering and tower-shaped poor trimming are not allowed. The trimmed cold-rolled coils are rolled in two passes to a thickness of 0.045mm with a processing rate of 50%. S6. Finished Product Annealing: Place the finished aluminum foil rolls into an annealing furnace for finished product annealing. During finished product annealing, the metal temperature difference between each heating zone of the annealing furnace should be ≤2℃. After 2 hours, the temperature is raised to 200℃ and held under negative pressure for 4 hours. Then, after another 2 hours, the temperature is raised to 295℃ and held under positive pressure for 28 hours. Then, when the furnace temperature is lowered to 170℃, the aluminum foil rolls are removed from the furnace and allowed to cool naturally to room temperature. After annealing, the aluminum foil rolls need to be checked to ensure that the thickness and width of the aluminum foil do not exceed the required range. The surface quality needs to be checked to ensure that there are no defects such as grease spots, roller marks, or scratches. The end face quality needs to be checked to ensure that there are no defects such as burrs, folds, or impacts. The tensile strength of the finished aluminum foil is tested to be 159MPa and the elongation is 18%. Finally, it is packaged according to the packaging requirements for aluminum foil for containers.

[0018] The parts of this invention not described in detail are prior art.

[0019] The embodiments selected herein for the purpose of disclosing the inventive objectives are currently considered suitable; however, it should be understood that the invention is intended to include all variations and modifications of the embodiments that fall within the scope of this concept and invention.

Claims

1. A method for producing high-strength 8006 alloy container foil in a low-carbon and environmentally friendly manner, characterized in that, Includes the following steps: S1. Smelting: 75%–85% recycled aluminum scrap and 15%–25% molten electrolytic aluminum are placed in a smelting furnace for remelting to prepare molten aluminum. After melting, an original sample is taken for testing. Based on the test results, iron, titanium, and manganese additives are added to adjust the alloy composition to meet the requirements. The mass percentages of each component are as follows: Si: ≤0.3%, Fe: 1.3-1.6%, Cu: ≤0.02%, Mn: 0.3-1.0%, Mg≤0.02%, Zn≤0.02%. Ti: 0.02%-0.03%, total impurity elements ≤0.03%, balance is aluminum. After adding iron agent, quick-dissolving silicon and titanium agent, ensure that the melt is stirred thoroughly and perform primary refining using a refining machine. After primary refining, take samples for testing. After the composition is qualified, perform secondary refining. Only argon gas is introduced as the refining gas for secondary refining. After secondary refining, let stand for 10 minutes and perform slag removal. After slag removal, let stand for 30-40 minutes and start the furnace. The furnace start-up temperature is 715-725℃. S2. Online treatment of melt: After the furnace is started, the aluminum melt flows smoothly into the guide trough. Aluminum titanium boron wire is added to the aluminum melt at a uniform speed to purify the aluminum melt. After purification, the aluminum melt enters the degassing box and plate filter box in sequence for degassing and filtration. After degassing and filtration, the aluminum melt flows directly into the front box. S3, Continuous casting: The temperature of the front box is 685℃~695℃. The aluminum melt in the front box flows into the casting cavity of the casting machine through the casting nozzle. The aluminum melt solidifies in the casting cavity to form a billet and then exits the plate. The casting speed is 7.2~8.0m / min and the billet thickness is 19mm. S4. Continuous rolling: The billet enters the three-stand rolling mill for rolling. The billet exit thickness of the first stand of the three-stand rolling mill is 7.0-8.0 mm, the billet exit thickness of the second stand of the three-stand rolling mill is 3.0-4.0 mm, and the billet exit thickness of the third stand of the three-stand rolling mill is 1.5-2.0 mm. The billet exiting the third stand of the three-stand rolling mill is coiled into a coil. S5. Cold Foil Rolling: 1.5-2.0mm thick aluminum coils are directly rolled in 3 passes on a cold rolling mill. The processing rate of each cold rolling pass is 45% to 55%. After the cold-rolled strip is trimmed, it is cold-rolled in 1 to 2 passes at a processing rate of 50% to 55% to produce finished aluminum foil. S6. Finished product annealing: Place the finished aluminum foil roll into the annealing furnace for finished product annealing. The temperature is uniformly raised to 200℃ within 2 hours and held under negative pressure for 4 hours. Then, the temperature is uniformly raised to 295℃ within 2 hours and held under positive pressure for 25-35 hours. Then, when the furnace temperature is lowered to 170℃, the aluminum foil is taken out of the furnace and allowed to cool naturally to room temperature. The tensile strength of the finished aluminum foil is tested to be 140Mpa~60Mpa, and the elongation is ≥18%.

2. The method for producing high-strength 8006 alloy container foil in a low-carbon and environmentally friendly manner according to claim 1, characterized in that, In step S1, recycled aluminum waste is added first, followed by molten aluminum.

3. The method for producing high-strength 8006 alloy container foil in a low-carbon and environmentally friendly manner according to claim 1, characterized in that, In step S1, the primary refining and secondary refining times are 30-40 min, the graphite rotor speed of the refining machine is set to 500-600 r / min, and the refining gas pressure for secondary refining is 0.4-0.6 MPa.

4. The method for producing high-strength 8006 alloy container foil in a low-carbon and environmentally friendly manner according to claim 1, characterized in that, In step S2, the rotation speed of the degassing box rotor is 450-550 rpm, the rotor is immersed in the molten aluminum to a height of more than 80 cm, and the furnace gas temperature of the plate filter box is 735℃-745℃.

5. The method for producing high-strength 8006 alloy container foil in a low-carbon and environmentally friendly manner according to claim 1, characterized in that, In step S2, aluminum titanium boron wire is added at a uniform rate of 3.0±1m / min.

6. The method for producing high-strength 8006 alloy container foil in a low-carbon and environmentally friendly manner according to claim 1, characterized in that, In step S4, the temperature of the aluminum strip metal plate at the exit of the third stand of the three-stand rolling mill is 200-230℃.

7. The method for producing high-strength 8006 alloy container foil in a low-carbon and environmentally friendly manner according to claim 1, characterized in that, In step S4, during the three-stand rolling mill, all three stands of the three-stand rolling mill need to be cooled and lubricated with emulsion, and the emulsion concentration is 3.5±0.1%.

8. The method for producing high-strength 8006 alloy container foil in a low-carbon and environmentally friendly manner according to claim 1, characterized in that, In step S5, the quality of the edge must be strictly controlled during the cutting process, and problems such as layering and poor tower-shaped cutting are not allowed.

9. The method for producing high-strength 8006 alloy container foil in a low-carbon and environmentally friendly manner according to claim 1, characterized in that, In step S6, the temperature difference between the metals in each heating zone of the annealing furnace during the finished product annealing is ≤2℃.