Method for manufacturing recycled aluminum alloy and method for manufacturing recycled aluminum alloy material
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- KOBE STEEL LTD
- Filing Date
- 2026-03-04
- Publication Date
- 2026-06-09
AI Technical Summary
【0013】 本開示の一態様に係る再生アルミニウム合金の製造方法は、高いスクラップ使用率、安定した収量および低い不純物濃度を達成することを可能とする。
Smart Images
Figure 2026094351000001_ABST
Abstract
Claims
1. A step of generating a compound containing a second component included in the secondary aggregate in a molten metal obtained by melting a secondary aggregate of multiple aluminum scraps containing aluminum alloy species with different chemical compositions, A step to obtain recycled aluminum alloy by removing the compound produced in the above production step, Equipped with, The above quadratic set was extracted from the population set by sorting aluminum scrap based on chemical composition analysis. The above secondary set is obtained by extracting multiple aluminum scraps that were not extracted from the above population set, such that the content of the first component is reduced. The first component described above is one or more selected from the group consisting of Cu, Zn, Si, and Ni. The second component described above is one or more selected from the group consisting of Fe, Si, Mn, Ti, V, Zr, Cr, and Co. A method for manufacturing recycled aluminum alloys.
2. The process further comprises extracting the secondary set from the parent set of multiple aluminum scraps containing aluminum alloy species with different chemical compositions, which is to be used in the process of producing the above by sorting aluminum scraps. A method for producing recycled aluminum alloy according to claim 1, wherein in the step of extracting the above secondary set, a chemical composition analysis is performed on the first component contained in the plurality of aluminum scraps of the above parent set, and the secondary set is extracted from the plurality of aluminum scraps that were not extracted from the above parent set in such a way that the content of the first component is reduced.
3. The multiple aluminum scraps included in the above secondary set include two or more types of aluminum alloys selected from the group consisting of JIS A1000 series, A3000 series, A5000 series, and A6000 series. A method for producing recycled aluminum alloy according to claim 1, wherein multiple aluminum scraps not extracted from the above-mentioned population include one or more aluminum alloys of the JIS A2000, A4000, and A7000 series.
4. The multiple aluminum scraps included in the above secondary set contain one or more aluminum alloy species selected from the group consisting of JIS AC7A, ISO Al-Mg3, Al-Mg6, and Al-Mg10. A method for producing recycled aluminum alloy according to claim 1, wherein multiple aluminum scraps not extracted from the above-mentioned population include one or more aluminum alloy species selected from the group consisting of JIS AC1B, AC2A, AC2B, AC3A, AC4A, AC4B, AC4C, AC4CH, AC4D, AC5A, AC8A, AC8B, AC8C, AC9A, AC9B, ISO Al-Cu4Ti, Al-Si5, Al-Si5Mg, Al-Si5Cu3, Al-Si6Cu4, Al-Si10Mg, Al-Si12, Al-Si12Cu, Al-Mg5Si1, and Al-Zn5Mg.
5. The multiple aluminum scraps included in the above secondary set contain one or more aluminum alloy types selected from the group consisting of JIS ADC5, ADC6, and ISO Al-Mg9. A method for producing recycled aluminum alloy according to claim 1, wherein multiple aluminum scraps not extracted from the above-mentioned population include one or more aluminum alloy species selected from the group consisting of JIS ADC1, ADC3, ADC10, ADC10Z, ADC12, ADC12Z, ADC14, ISO Al-Si9, Al-Si12(Fe), Al-Si10Mg(Fe), Al-Si8Cu3, Al-Si9Cu3(Fe), Al-Si9Cu3(Fe)(Zn), Al-Si11Cu2(Fe), Al-Si11Cu3(Fe), Al-Si12Cu1(Fe), and Al-Si17Cu4Mg.
6. The method for producing recycled aluminum alloy according to claim 1, wherein the multiple aluminum scraps not extracted from the above-mentioned population contain, as a chemical composition, at least one of Cu: 0.15% by mass or more, Zn: 0.25% by mass or more, Si: 0.60% by mass or more, and Ni: 0.10% by mass or more.
7. The method for producing recycled aluminum alloy according to claim 1, wherein the plurality of aluminum scraps included in the above secondary aggregate have a chemical composition comprising at least one of Cu: 1.0 mass% or less, Zn: 1.0 mass% or less, Si: 1.5 mass% or less, and Ni: 0.5 mass% or less.
8. The method for producing recycled aluminum alloy according to claim 1, wherein the above chemical composition analysis is performed on aluminum scrap in a solid state.
9. The above chemical composition analysis is based on laser-induced breakdown spectroscopy and is a method for producing recycled aluminum alloy according to claim 1.
10. A method for producing recycled aluminum alloy according to claim 1, wherein, in the above-mentioned step of production, an intermetallic compound containing the second component is produced as the above-mentioned compound by adding Mg to the molten metal.
11. The above second component includes one or more selected from the group consisting of Ti, V, Zr, and Cr. A method for producing recycled aluminum alloy according to claim 1, wherein in the above-mentioned production step, the addition of B to the molten metal produces the boride of the second component as the compound.
12. The above second component includes one or more selected from the group consisting of Ti, V, Zr, and Cr. A method for producing recycled aluminum alloy according to claim 10, wherein in the above-mentioned production step, the addition of B to the molten metal produces the boride of the second component as the compound.
13. A method for producing recycled aluminum alloy according to claim 1, further comprising the step of adjusting the composition of the molten metal after the above-mentioned compound has been removed.
14. The method for producing a recycled aluminum alloy according to claim 1, further comprising one or more melting and casting steps in which the recycled aluminum alloy obtained in the above step of obtaining the recycled aluminum alloy is melted and cast.
15. The method for producing a recycled aluminum alloy according to claim 14, wherein the molten metal obtained by melting the recycled aluminum alloy in the above melting and casting step is to be adjusted for composition.
16. The method for producing recycled aluminum alloy according to claim 2, further comprising the step of removing foreign matter other than aluminum mixed in the parent set before the step of extracting the above-mentioned secondary set.
17. The method for producing recycled aluminum alloy according to claim 2, further comprising the step of removing at least one of oil, paint, or coating adhering to the surface of a plurality of aluminum scraps in the parent set, prior to the step of extracting the above-mentioned secondary set.
18. A method for producing recycled aluminum alloy according to claim 1, wherein the chemical composition of at least some of the aluminum scrap in the above-mentioned aggregate is unknown.
19. The method for producing recycled aluminum alloy according to claim 1, further comprising the step of sampling the molten metal after the above-mentioned compound has been removed and performing a component analysis.
20. From the above population, a step of extracting one or more aluminum scraps consisting of JIS A1000 series aluminum alloys, A step of mixing the one or more aluminum scraps extracted in the aluminum scrap extraction step with the molten metal after the compound has been removed. A method for producing recycled aluminum alloy according to claim 1, further comprising:
21. A method for producing a recycled aluminum alloy material, comprising the step of plastically processing a recycled aluminum alloy obtained by the method for producing a recycled aluminum alloy according to any one of claims 1 to 20.