The Recovery of Precious Metals from spent PCB by Pyro-metallurgical Process

초록

A recovery of precious metals from spent printed circuit board(PCB) has been investigated by using pyrometallurgical process. For this purpose vertical electron resistance furnace and high frequency induction furnace were used for calcinations and melting the scrap, respectively. In order to enhance the separation of precious metals from the scrap, various slag systems were attemped for used in the process and copper was used for collector metal to collect precious metals from the scrap. Main variables used in the experiments were the slag properties such as composition and temperature of the slags. High temperature viscometer was used to measure the viscosity of slag system. It was found that viscosity of slag greatly inflyences on the separation of precious metals from melted scrap.