Process for the continuous purification of metals by fractional crystallization on a rotary drum
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United States of America Patent
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Apr 8, 1986
Grant Date -
N/A
app pub date -
May 13, 1985
filing date -
May 17, 1984
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to a process for fractional crystallization of metals at the surface of a rotary drum. It is characterized in that the distance between the drum (1) and the bottom of the trough (4) containing the metal in the liquid state is regulated and said trough is divided, in the direction of rotation of the drum (3), into an upstream zone (6) and a downstream zone (7) between which the circulation of liquid is restricted, said distance being regulated in such a way as possibly to permit the crystals to be compressed in the upstream zone, and that the crystals are re-melted in the downstream zone, in order to collect the purified metal in the liquid state. The invention is used in the continuous purification of metals such as in particular aluminum.
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