Title:
ALUMINUM REFINEMENT
Document Type and Number:
Japanese Patent JPS5935641
Kind Code:
A
Abstract:
Aluminum contaminated with at least one of the metals of the groups II b, III a, IV a and V a of the periodic table of elements is purified by means of sodium applied in liquid extraction in a separating column in the temperature range between the melting point of the aluminum or aluminum alloys and the boiling point of sodium. The pre-heated sodium is introduced into the separating column from a circuit having a heat exchanger, solids precipitator, pump and storage tank, in quantities at least 5 times greater than the mass of contaminating metal. The sodium flows countercurrent to the contaminated aluminum which is also introduced into the separating column. The purified aluminum containing a small residual amount of contaminating metal and a sodium content not exceeding 500 ppm is removed from the separating column. The sodium containing a low concentration of contaminating metal is returned to the circuit.
Inventors:
TEIBOO KUGURAA
Application Number:
JP13423983A
Publication Date:
February 27, 1984
Filing Date:
July 22, 1983
Export Citation:
Assignee:
ALUSUISSE
International Classes:
C22B21/06; (IPC1-7): C22B21/06
Attorney, Agent or Firm:
Kyozo Yuasa
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