Method for processing scrap of electronic instruments

Details Method for processing scrap of electronic instruments Method for processing scrap of electronic instruments

1991-12-06

1993-06-08

Watts, Douglas D.

Solid material comminution or disintegration

Processes

With classifying or separating of material

241DIG38, B02C 700

Patent

active

052171710

ABSTRACT:
A method is taught for processing scrap of electromagnetic equipment containing precious, nonferrous and ferrous metals, plastics and ceramics to recover significant portions of the precious metals contained therein. The method involves mechanically crushing the scrap to produce a mechanical mixture of particles of the electromagnetic equipment. This mixture is then subjected to mechanical concentration by hydrocyclone and recleaning on a cleaning table thereby producing a rough concentrate of precious and nonferrous metals. This rough concentrate is in turn, subjected to magnetic separation and then hydrometallurgical processing whereby the nonferrous metals leach into solution thereby producing an enriched concentrate of precious and nonferrous metals in the solid sediment.

REFERENCES:
patent: 4242129 (1990-12-01), Kellerwessel et al.
patent: 4775106 (1988-10-01), Jha et al.
patent: 5139203 (1992-08-01), Alavi

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