Production method of recycled aluminum

A production method and recycled aluminum technology, which is applied in the field of metal smelting and processing, can solve the problems of unsatisfactory removal, waste gas, waste water environmental pollution, etc., and achieve the effects of improving recovery rate, avoiding air pollution, and shortening the process flow

Active Publication Date: 2013-10-23
ALNAN ALUMINIUM CO LTD
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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,

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  • Production method of recycled aluminum
  • Production method of recycled aluminum

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Embodiment 1

[0047] Classify and stack pure aluminum, deformed aluminum alloy, cast aluminum alloy, aluminum core wire and waste aluminum products. For waste aluminum products recovered from waste companies, they should be disassembled to remove steel and other non-ferrous metal parts connected with aluminum materials , and then subdivided, and then use cleaning and crushing methods to remove sludge, fibers and paper. Large pieces of waste aluminum products must be smashed before cleaning. For light and loose flake waste aluminum pieces, use a hydraulic metal baler to press Packing; for aluminum steel cored wire, the steel core is separated first, and then the aluminum wire is wound into a coil; the cleaning process uses an aqueous solution with a weight content of 1-2% surfactant, and the water temperature is 40-60°C, and the method is carried out by spraying and rotating Cleaning: After cleaning, use magnetic separation equipment to separate the magnetic scrap iron and steel from the scra...

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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...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B21/00
CPCY02P10/20
Inventor 郑玉林陈平吴津生陈荣立刘杰罗强张志军
Owner ALNAN ALUMINIUM CO LTD
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