Method for treating waste printed circuit boards with molten mix

Details Method for treating waste printed circuit boards with molten mix Method for treating waste printed circuit boards with molten mix

1999-09-28

2000-07-18

Husar, John M.

Solid material comminution or disintegration

Processes

With application of fluid or lubricant material

241 23, 241 2413, 241 2418, 241DIG38, B02C 1900, B02C 1912

Patent

active

060894792

ABSTRACT:
A method for treating waste printing circuit boards with molten mixture of inorganic salts comprising actions of: (1) putting the circuit boards into the molten inorganic salts contained in a treating furnace; (2) crushing and stirring for copper foil of the circuit boards to be separated therefrom; (3) further stirring to separate the foil from the plastic and the glass fiber of the circuit boards; (4) scraping the floating residues of the plastic and the glass fiber on upper surface of the molten inorganic salts with a floating residues scraping device; (5) collecting the carbonized plastic residues and the glass fiber; (6) converting waste gas produced in the process into an unharmful and stable one; and (7) removing the copper foil by a certain amount regularly with a removing device.

REFERENCES:
patent: 3210182 (1965-10-01), Funari
patent: 3632336 (1972-01-01), Cameron
patent: 4874486 (1989-10-01), Hanulik
patent: 5678775 (1997-10-01), Chapman
patent: 5683040 (1997-11-01), Jakob et al.
patent: 5843287 (1998-12-01), Wicks et al.
patent: 5887805 (1999-03-01), Chapman
patent: 5979033 (1999-11-01), Chang et al.

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