Production method of recycled aluminum

Abstract

The invention relates to a production method of recycled aluminum. The production method comprises the steps: classifying and stacking waste aluminum or aluminum ash slag, then separating, wherein the separation is to remove dirt by washing and crushing; removing steel by a magnetic separation method, then crushing the initially purified aluminum, sieving to obtain a mixed aluminum powder, then putting into a rotary furnace for a combustion reaction, so as to decompose the aluminum slag or the waste aluminum into aluminum liquid and aluminum ash; putting the aluminum liquid in a refining furnace for further smelting, to obtain aluminum liquid with relatively high purity, outpouring to form aluminum ingots, wherein the pure aluminum content can reach 99.99%; and merging the aluminum ash unloaded from the rotary furnace with aluminum ash obtained by treating flue gas through a cyclone dust extractor, wherein the content of aluminum in the residues is 1-3%, then packaging, and providing the packaged product as a smelting additive for a steel mill.

Description

technical field [0001] The invention relates to a metal smelting and processing method, especially a production method of secondary aluminum. Background technique [0002] Due to the relative lack of high-quality aluminum ore resources in China, only Shanxi, Guangxi, Guizhou, Henan and Jiangxi have relatively rich bauxite ore. The production of aluminum metal from alumina consumes a lot of energy and the process is complicated, and the production of electrolytic aluminum metal is still slow It cannot meet the ever-growing construction and development requirements, so aluminum resources in some places are mainly obtained from recycled waste aluminum, which includes pure aluminum scraps from aluminum processing enterprises, deformed aluminum alloys from old buildings on construction sites, casting Aluminum alloy, aluminum core wire and waste aluminum products, etc., and the literature reports that the recycling of waste aluminum is generally classified, separated, magnetically...

AI Technical Summary

Problems solved by technology

[0006] Although the above-mentioned recycled aluminum production method can recycle waste miscellaneous aluminum, because the domestic technology is not yet mature enough, there is a big gap with foreign metal recycling companies in terms of separation, magnetic separation and smelting, especially the production of waste miscellaneous aluminum. During the smelting process, some raw materials containing iron and heavy metal impurities or organic matter, such as steel-cored aluminum wire, iron-cored aluminum wire, plastic-coated aluminum-cored wire, etc., cannot meet the requirements, so we can only make some low-end aluminum alloys for daily use. Products, the production process also caused environmental pollution of waste gas and waste water

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