Solder skimmings recovery process

Details Solder skimmings recovery process Solder skimmings recovery process

1976-03-26

1978-08-22

Rutledge, L. Dewayne

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

23267R, 75 78, 75 97A, 241 20, 423 98, C22B 1300, C22B 1304, C01C 116, C01G 904

Patent

active

041086350

ABSTRACT:
An improvement in the method for recovering marketable values of solder, lead, and a zinc chloride-ammonium chloride solution from solder skimmings which comprises grinding the skimmings, water leaching the skimmings to dissolve the zinc chloride and ammonium chloride, screening the leach residue to recover solder from the leach slurry, separating the ammonium and zinc chloride solutions from the lead chloride in the leach slurry, and contacting the lead chloride with an alkaline flux, a reductant, and an oxygen-containing gas under heat to recover lead from the lead chloride.

REFERENCES:
patent: 3160352 (1964-12-01), Mollring
patent: 3675859 (1972-07-01), Mitchell
patent: 3754897 (1973-08-01), Derham et al.
patent: 3770424 (1973-11-01), Floyd et al.
patent: 3892563 (1975-07-01), LaPoint
patent: 3905808 (1975-09-01), Bzura

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