Method for regenerating aluminum alloy with target ingredient from scrap aluminum

Abstract

The invention discloses a method for regenerating aluminum alloy with target ingredient from scrap aluminum, relates to a scrap aluminum recycling technology and belongs to the technical field of circular economy. The technology, in which the scrap aluminum are taken as a raw material and comprises the steps of iron removal by magnetic separation, pretreatment, melting, melt ingredient detection, calculation, proportioning, and ingredient regulation for finally obtaining the aluminum alloy with the target ingredients, is developed. By adopting the method disclosed by the invention, the recycling of the scrap aluminum is achieved, and the aluminum alloy with the target ingredients can be obtained; and the method has the characteristics of no pollution, high recycling rate, easiness for realization of industrial production and obvious economic and environmental benefits.

Description

technical field [0001] The invention provides a method for regenerating target aluminum alloys from waste miscellaneous aluminum, which belongs to the field of circular economy technology and alloy preparation, and in particular relates to a green recycling method for waste aluminum. Background technique [0002] As the market demand for aluminum alloy continues to grow, the supply of bauxite resources is insufficient, and the secondary aluminum industry must be developed. Because the unit energy consumption of secondary aluminum production is only 3%-4% of primary aluminum, my country's secondary aluminum alloy industry has developed rapidly, and the current output has reached about 30% of primary aluminum output. [0003] The production of recycled aluminum alloys usually uses recycled waste aluminum parts, pop cans, packaging aluminum foil, scrapped aluminum products, scraps in the process of producing aluminum products, and waste aluminum wires as the main raw materials,...

AI Technical Summary

Problems solved by technology

[0005] ①Scrap aluminum has a wide range of sources and often contains a lot of iron impurities. These iron impurities are not removed and are directly smelted together with scrap aluminum, which brings great difficulties to the subsequent treatment of iron removal in the molten liquid;

[0006] ②Some of the recovered aluminum scraps contain moisture, grease, and some organic paint layers on the surface. At present, these aluminum scraps are only smelted directly in China, and there is no treatment such as drying and removing organic substances in the smelting process. The residues of aluminum have an impact on the purity of molten aluminum, and grease, surface paint, etc. are prone to pollution, which will affect the quality and recovery rate of recycled aluminum alloys, and cause serious pollution to the environment;

[0007] ③ During smelting, direct contact between waste miscellaneous aluminum and air causes serious burning loss, and the recovery rate is not high;

[0009] On June 3, 2010, Huang Chongsheng applied for the Chinese invention patent "High-performance uniform aluminum alloy and its production method", which disclosed a high-performance uniform aluminum alloy ingot and its production method, introduced the entire production process, and introduced the composition deployment without detailed description

[0012] The above-mentioned patents are all treatment methods of a certain process in the recycling process of waste aluminum (such as removal of harmful elements, iron removal, etc.) or simply introduce the production process of a certain aluminum alloy, and do not involve pollution-free pretreatment

The raw materials of scrap aluminum come from a wide range of sources, including waste forgings, waste castings, etc., which contain sundries such as water, oil, or paint. The previous patents did not point out specific process parameters for removing water, oil, or paint.

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