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Aluminum ingots, according to the national standard (GB/T 1196-2008), should be called "aluminum ingots for remelting". There are two categories: cast aluminium alloy and deformed aluminium alloy. According to the national standard "Al99.90, Al99.85, Al99.70, Al99.60, Al99.50, Al99.00, Al99.7E and Al99.6E" are divided into eight grades according to chemical composition. With pure aluminium and recycled aluminium as raw materials, other elements such as silicon (Si), copper (Cu), magnesium (Mg), iron (Fe) are added according to international standards or special requirements. To improve the alloy prepared by pure aluminium in the deficiencies of foundry, chemical and physical properties.