Device and process for pre-treating electronic circuit scraps

Details Device and process for pre-treating electronic circuit scraps Device and process for pre-treating electronic circuit scraps

1994-10-04

1996-06-04

Kwon, John T.

Drying and gas or vapor contact with solids

Apparatus

Gravity flow type

34168, 34172, F26B 1712

Patent

active

055221530

ABSTRACT:
A device for pre-treating electronic circuit scraps has a conduit placed at a slope to the vertical direction. Also, some counter-rotating disk wheels are arranged in a cascade and bear grid-like vanes. These wheels begin at an upper end where the scraps are introduced through an inlet and extend down to a lower end where a scrap outlet is located. The inlet and the outlet for the scraps are made up of rotatable doors. The inlet has a loading opening and the outlet has a discharge conveyor. Air barriers may be interposed at the inlet and the outlet. The conduit includes an element that causes the heat-exchange fluid to circulate inside from the lower end to the upper end. A process for pre-treating the electronic circuit scraps has several steps: first, carrying out a treatment in an oven including the above-mentioned device; second, carrying out a treatment of plastic materials and metals in a refrigerator including the above-mentioned device; third, burning outlet air; and fourth, burning outlet heat-exchange fluid.

REFERENCES:
patent: 1796324 (1931-03-01), Farnham
patent: 1880284 (1932-10-01), Schenk
patent: 4337584 (1982-07-01), Johnson
patent: 4619606 (1986-10-01), Numberger
patent: 4629421 (1986-12-01), Kriesberg et al.
patent: 4752359 (1988-07-01), Sundermann et al.

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