Separation of free lead from aluminum beverage cans

Details Separation of free lead from aluminum beverage cans Separation of free lead from aluminum beverage cans

1993-08-13

1994-08-30

Andrews, Melvyn J.

Specialized metallurgical processes, compositions for use therei

Processes

Producing or treating free metal

75403, C22B 700

Patent

active

053424280

ABSTRACT:
A method for removing free lead from a feed stream of used aluminum beverage cans (UBC) to reduce the total lead content of the feed stream. The UBC material is shredded, heated to a temperature above the lead melting point, and agitated to cause the molten lead to fragment and form small particles. The material is then screened to form a second particle stream containing a large percentage of any free lead present in the feed stream and a third particle stream comprised primarily of shredded UBC. The second particle stream is introduced into a fluidized bed to separate the fines from the aluminum particles, the fines containing the majority of the free lead. The aluminum-enriched remaining particles, after separation from the fines, are conveyed for subsequent reprocessing.

REFERENCES:
patent: 4491473 (1985-01-01), Bowman et al.
patent: 4498523 (1985-02-01), Bowman et al.
patent: 5054747 (1991-10-01), Perry

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