Process option 2- The use of conventional leachants for recovery of metals from
waste PCBs
This process option represents bench-scale method for extraction and recovery of
copper and precious metals from waste PCBs. After comminution, material was
subjected to serial of hydrometallurgical processing routes: sulphuric acid leaching and
precipitation for Cu recovery; chloride leaching followed by cementation for Pd, Ag, Au
and Cu recovery and cyanidation and activated carbon adsorption for recovery of Au
and Ag. The proposed flowsheet is presented in Figure 4