[China Aluminum Network] China's renewable aluminum industry has made considerable progress after nearly 10 years of development, but it still lags behind in waste pretreatment. The pretreatment process used is generally as follows:

1 For aluminum- and aluminum-alloy scraps that are single-type or substantially free of other impurities, they are generally not subjected to complicated pretreatment, except that the bulk aluminum scrap is crushed (sheared or otherwise) into pieces of a specification that meets the requirements. The loose aluminum waste is pressed into pieces and classified according to the type and composition of the waste;

2 For high-grade scrap aluminum chips (including cast aluminum alloy, deformed aluminum alloy and pure aluminum, etc.), in the large-scale reclaimed aluminum companies - generally remove dirt and other inclusions directly into the melting furnace smelting; , - General use of artificial cast aluminum alloy, deformed aluminum alloy and pure aluminum, etc., and then use them separately;

3 For the low-grade slicing, due to its complex composition (including scrap steel, scrap copper, waste lead and other metals and non-metallic inclusions such as plastics, soil, rubber, sawdust, etc.), mainly rely on manual sorting. First screen out dirt and waste, then pick out non-metallic and metal scrap. The waste aluminum that is sorted out is mixed, and it is no longer subdivided.

In short, the waste pretreatment technology of China's reclaimed aluminum enterprises (including large-scale reclaimed aluminum companies) is still very backward, and simple manual sorting is still used. The tools used are magnets, steel files, hammers, pliers, and reeling tools. The experience is that the labor intensity, high cost, and poor quality are all factors that restrict the development of China's aluminum recycling enterprises.

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