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CN-121976066-A - Method for processing aluminum alloy by utilizing waste aluminum materials

CN121976066ACN 121976066 ACN121976066 ACN 121976066ACN-121976066-A

Abstract

The application relates to the field of aluminum alloy raw material production, and particularly discloses a method for processing aluminum alloy by utilizing waste aluminum materials. The method for processing the aluminum alloy by utilizing the waste aluminum material comprises pretreatment, smelting, refining, component adjustment, secondary refining and casting. The method for processing the aluminum alloy by utilizing the waste aluminum material has the advantage of improving the purity and the performance of the aluminum alloy processed by utilizing the waste aluminum material.

Inventors

  • WANG JILIN
  • HU ZHANGJIAN
  • YU JINKE
  • XU XIANGDONG

Assignees

  • 湖南振升恒佳新材料科技有限公司

Dates

Publication Date
20260505
Application Date
20231117

Claims (8)

  1. 1. A method for processing an aluminum alloy by using waste aluminum materials, which is characterized by comprising the following steps: S1, pretreatment, namely conveying the waste aluminum materials into a crusher to be crushed, obtaining aluminum material particles, soaking the aluminum material particles in water, adding a cleaning solvent to remove stains on the surfaces of the waste aluminum materials, carrying out ultrasonic cleaning on the aluminum material particles after soaking for 3-6 hours, and heating the aluminum material particles to 300-400 ℃ and drying after cleaning; S2, smelting, namely delivering aluminum particles into a smelting furnace, heating to 700-750 ℃, preserving heat, stirring at a speed of 30-60r/min for 5-30min to enable oxides and impurities in the aluminum liquid to float upwards to form surface dross, and removing the surface dross by using a drossing device; S3, refining, namely adding a refining agent into a smelting furnace, wherein the adding amount of the refining agent is 0.002% -0.004% of the weight of the aluminum liquid, standing for 15-30min after uniformly stirring, and removing surface scum by adopting a slag skimming device at the temperature of 700-730 ℃; S4, component adjustment, namely sampling and detecting alloy components at a smelting furnace mouth, and adding alloy elements into the aluminum liquid according to a detection result, wherein the content of Fe in the aluminum liquid is 0.5-1.3%, the content of Si in the aluminum liquid is 0.5-1.5%, the content of Cu in the aluminum liquid is 0.1-0.3%, the content of Mg in the aluminum liquid is 0.5-0.8%, the content of Mn in the aluminum liquid is 1.0-1.3%, and the content of Zn in the aluminum liquid is 1.2-1.5%; s5, secondary refining, namely adding 0.005-0.009% of the refining agent by weight of the aluminum liquid, uniformly stirring, standing for 20-40min at 700-730 ℃, and removing surface scum by adopting a skimming device; and S6, casting, namely keeping the temperature in the furnace at 730-745 ℃, casting the molten aluminum in a forming grinding tool after passing through a ceramic foam filter, and cooling to obtain the aluminum alloy.
  2. 2. The method for processing an aluminum alloy by using a waste aluminum material as recited in claim 1, wherein the removing of the surface dross in the S2 step is followed by removing of the magnetic impurities in the furnace by using a suction tool.
  3. 3. The method for processing aluminum alloy by utilizing waste aluminum material as set forth in claim 1, wherein the step S2 is completed by further performing a detection process, and the detection process comprises the following steps: a1, sampling in aluminum liquid and detecting components; And A2, when the alloy content in the aluminum liquid is qualified, performing the step S3, when the alloy content in the aluminum liquid is unqualified, calculating the required pure aluminum amount, adding pure aluminum into the aluminum liquid, stirring after the pure aluminum is completely melted in the aluminum liquid, sampling and detecting, repeating until the alloy content is qualified, and transferring to the step S3.
  4. 4. The method of producing an aluminum alloy by using a waste aluminum material as set forth in claim 3, wherein the aluminum liquid has a Fe content of 1.3% or less, a Si content of 1.5% or less, a Cu content of 0.3% or less, a Mg content of 0.8% or less, a Mn content of 1.3% or less, and a Zn content of 1.5% or less.
  5. 5. The method of processing aluminum alloy using waste aluminum material as set forth in claim 1, wherein the refining agent comprises, by weight, 50-60 parts of KCl,30-35 parts of K 2 CO 3 , 10-15 parts of LiCl,25-35 parts of AlF 3 , 5-15 parts of potassium fluoroaluminate, 5-10 parts of CaF 2 , 5-15 parts of activated carbon, 15-25 parts of light calcium carbonate, 10-15 parts of marble powder, and 3-8 parts of CaO.
  6. 6. The method for producing an aluminum alloy by using a waste aluminum material as set forth in claim 1, wherein the step S4 is performed with heat preservation and standing after adding the alloying element, and the standing time is >15 minutes.
  7. 7. The method for processing aluminum alloy by utilizing waste aluminum material as set forth in claim 1, wherein the secondary refining is performed by stirring with a refining tube, and argon is simultaneously introduced into the aluminum liquid during stirring with the refining tube.
  8. 8. The method for processing aluminum alloy by utilizing waste aluminum material as set forth in claim 1, wherein the order of adding the alloying elements in the step S4 is manganese, iron, titanium, chromium, al-Si intermediate alloy, magnesium in order.

Description

Method for processing aluminum alloy by utilizing waste aluminum materials Technical Field The application relates to the field of aluminum alloy raw material production, in particular to a method for processing aluminum alloy by utilizing waste aluminum materials. Background Aluminum alloy is a commonly used structural material, and has light weight, high strength and good corrosion resistance. Waste aluminum refers to aluminum products or aluminum materials which lose original value after use, such as waste automobile parts, waste packaging materials, aluminum products in waste buildings and the like. By recycling the waste aluminum, we can avoid over-exploitation of new aluminum ore and waste of ore resources. Compared with the process of extracting aluminum from ores, the recycling of the waste aluminum not only saves natural resources, but also reduces energy consumption and environmental pollution. Conventional aluminum ore mining requires a large amount of energy and water resources, and can have an irreversible effect on the land and ecological environment. The reuse of the waste aluminum can reduce the requirements, prolong the service life of aluminum resources and realize sustainable utilization of the resources. Toxic substances and gases are generated when the waste aluminum garbage is buried or burned, and pollution is caused to soil, water source and air. But by effectively recycling the waste aluminum, we can reduce the emission of these pollutants and reduce the harm to the ecological environment. In addition, reuse of scrap aluminum also facilitates implementation of the recycling economy mode. By using the waste aluminum for producing the aluminum alloy, the resource utilization of waste can be realized, and the dependence on limited resources is reduced. Meanwhile, the aluminum alloy produced by the waste aluminum has excellent properties of high strength, light weight and the like, is suitable for a plurality of fields, and provides a wider market prospect for social and economic development. Although the recycling of the scrap aluminum has environmental and economical advantages, the utilization efficiency of the scrap aluminum is not high in the actual process production. Because of the diversity of sources of scrap aluminum, the high impurity content such as oxides, silicates, etc. therein affects the purity and alloying effect of aluminum, so that the aluminum material prepared from scrap aluminum has poor properties. Disclosure of Invention The application provides a method for processing aluminum alloy by utilizing waste aluminum materials in order to improve the purity and performance of the aluminum alloy processed by the waste aluminum materials. The method for processing the aluminum alloy by utilizing the waste aluminum material adopts the following technical scheme: A method for processing aluminum alloy by utilizing waste aluminum materials, comprising the following steps: S1, pretreatment, namely conveying the waste aluminum materials into a crusher to be crushed, obtaining aluminum material particles, soaking the aluminum material particles in water, adding a cleaning solvent to remove stains on the surfaces of the waste aluminum materials, carrying out ultrasonic cleaning on the aluminum material particles after soaking for 3-6 hours, and heating the aluminum material particles to 300-400 ℃ and drying after cleaning; S2, smelting, namely delivering aluminum particles into a smelting furnace, heating to 700-750 ℃, preserving heat, stirring at a speed of 30-60r/min for 5-30min to enable oxides and impurities in the aluminum liquid to float upwards to form surface dross, and removing the surface dross by using a drossing device; S3, refining, namely adding a refining agent into a smelting furnace, wherein the adding amount of the refining agent is 0.002% -0.004% of the weight of the aluminum liquid, standing for 15-30min after uniformly stirring, and removing surface scum by adopting a slag skimming device at the temperature of 700-730 ℃; S4, component adjustment, namely sampling and detecting alloy components at a smelting furnace mouth, and adding alloy elements into the aluminum liquid according to a detection result, wherein the content of Fe in the aluminum liquid is 0.5-1.3%, the content of Si in the aluminum liquid is 0.5-1.5%, the content of Cu in the aluminum liquid is 0.1-0.3%, the content of Mg in the aluminum liquid is 0.5-0.8%, the content of Mn in the aluminum liquid is 1.0-1.3%, and the content of Zn in the aluminum liquid is 1.2-1.5%; s5, secondary refining, namely adding 0.005-0.009% of the refining agent by weight of the aluminum liquid, uniformly stirring, standing for 20-40min at 700-730 ℃, and removing surface scum by adopting a skimming device; and S6, casting, namely keeping the temperature in the furnace at 730-745 ℃, casting the molten aluminum in a forming grinding tool after passing through a ceramic foam filter, and cooling to obtain the aluminum