METHOD FOR RECOVERING METAL FROM CIRCUIT BOARD AND DEVICE THEREFOR

摘要

PURPOSE:To recover a high-grade metal such as copper from a circuit board such as a copper-clad laminate at a high recovery rate. CONSTITUTION:A circuit board 1 is dry-distilled at 500-1000 deg.C in a reducing atmosphere. The residue 5 is cooled to a temp. at which the residue is not rapidly oxidized even by contact with the atmosphere. The cooled material 7 is crushed. The crushed material 9 is classified into a metal such as copper 11 and a base material component such as glass 12. The gaseous distillate 4 generated in the first stage is burnt, and a part of the combustion gas is used as the heat source. Meanwhile, the heat of a part of the combustion gas is recovered, and the combustion gas is supplied as the inert gas in dry distillation.