Methods of recovering and purifying secondary aluminum

Details Methods of recovering and purifying secondary aluminum Methods of recovering and purifying secondary aluminum

C - Chemistry, Metallurgy

25

C

C25C 3/06 (2006.01)

Patent

CA 2630469

The invention provides efficient and effective processes for recovering metals such as aluminum, magnesium and lithium from mixed waste sources such as auto shredder residue, aluminum cans, waste particles of aluminum alloy and municipal waste. The metal-waste source is dissolved in a more noble metal solvent at a temperature at which contaminants do not dissolve. The purified metal is then recovered from the solvent, preferably by electrorefining.

La présente invention a trait à des procédés efficaces et efficients pour la récupération de métaux tels que l'aluminium, le magnésium et le lithium à partir de sources mixtes telles que des résidus de broyeurs, des boîtes en aluminium, des particules de déchets d'alliage à base d'aluminium et des déchets urbains. La source de déchets métallique est dissoute en un solvant de métal plus noble à une température à laquelle des contaminants ne se dissolvent pas. Le métal purifié est ensuite récupéré à partir du solvant, de préférence par électroraffinage.

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