Method of aluminum alloys of scrap aircraft reused to produce 2024 or 7075 aluminum alloy

Abstract

The invention provides a method of an aluminum alloy of scrap aircraft reused to produce a 2024 or 7075 aluminum alloys, belongs to circular economy technologies, and particularly relates to a methodfor scrap aluminum alloys preservation and recycling. According to the method, the aluminum alloys of the scrap aircraft is adopted as a raw material, and the 7075 or 2024 aluminum alloys are obtainedafter pretreatment, smelting, impurity removal, composition adjustment, filtration, refining, purification, and casting; and in the composition adjustment step, low-cost preservation and recycling ofthe aluminum alloys of the scrap aircraft are realized by using other waste aluminum alloys and / or intermediate alloys for composition adjustment. According to the method of the aluminum alloys of the scrap aircraft reused to produce the 2024 or 7075 aluminum alloys, the production cost can be obviously lowered, and industrial application is facilitated.

Description

technical field [0001] The invention provides a method for producing 2024 or 7075 aluminum alloys by reusing waste aircraft aluminum alloys, which belongs to the technology of circular economy, and in particular relates to a method for recycling and reusing waste aluminum alloys. Background technique [0002] According to the forecast of the Aircraft Recycling International Association (AFRA), 6,000-8,000 aircraft will be decommissioned in the next 10-20 years. Scrapped aircraft contain a large amount of aluminum alloys. Taking civil airliners as an example, the amount of aluminum alloys accounts for about 70% of the total weight, and mainly 2XXX and 7XXX aluminum alloys. During the long-term stacking of scrapped aircraft, ultraviolet rays, rainfall, oxidation, etc. will cause the degradation of aluminum alloys, and also cause environmental problems such as soil and groundwater pollution, and a large amount of land resources are occupied. Therefore, the recycling of scrappe...

AI Technical Summary

Problems solved by technology

The main problems of recycling 2024 and 7075 aluminum alloys from waste aircraft aluminum alloys are: the waste aircraft aluminum alloys contain a large number of riveting parts, and it is difficult to separate different grades of aluminum alloys and other impurities through sorting; the types of alloying elements in waste aircraft aluminum alloys In the smelting process, it is usually necessary to add a large amount of pure aluminum to dilute the excess elements, which significantly increases the production cost

[0005] It can be seen that the existing technologies for the recycling of scrap aircraft aluminum alloys have problems such as high production costs, incomplete composition adjustment, and the downgrading of aluminum alloy products to varying degrees. It is urgent to develop recycling technologies for scrap aircraft aluminum alloys.

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