Method of separating and recovering valuable metals and non-meta

Solid material comminution or disintegration – Processes – With classifying or separating of material

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241 2418, 241 29, 241DIG31, B02C 2310

Patent

active

056305540

ABSTRACT:
To insure that rejects or scraps of composite materials such as printed wiring boards that consist of the mixture of metal and non-metal parts are separated into the metal and non-metal components with good precision so that both components can be recovered as recyclable valuables, the composite materials are broken into pieces by means of a shearing machine or the like and the pieces are thereafter ground with a hammer mill or the like to form a mixed powder consisting of metal and non-metal particles, which mixed powder is then fed continuously on to a belt conveyor inclined at an angle with respect to a line perpendicular to the direction of travel, whereby the metal particles are efficiently separated from the non-metal particles; the recovered metal particles being fed to an electrostatic separator to obtain higher grade of concentration by removing the non-metal inclusions.

REFERENCES:
patent: 3672500 (1972-06-01), Hayes
patent: 5139203 (1992-08-01), Alavi
patent: 5217171 (1993-06-01), Feldman
patent: 5279464 (1994-01-01), Giegerich et al.

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