MECHANICAL AND PYROMETALLURGICAL RECYCLING OF ELECTRONIC WASTES

摘要

In this paper, the mechanical milling of the electronic wastes was carried out. The metal parts and plastic parts were roughly separated. The final plastic powder size could be as small as ～100 μm. Then the pyrometallurgical recycling Printed Circuit Boards (PCB) was executed. The mechanisms of thermal degradation and combustion are investigated using TG/DTA and MS. Some chemical powders, such as Na_2CO_3, NaHCO_3, NaOH and CaCO_3 are used to control the exhausted toxic gas such as Br_2.