Conventional flotation techniques to separate metallic and nonmetallic fractions from waste printed circuit boards with particles nonconventional size

Abstract

This paper shows the results obtained by using a conventional Denver D12 flotation cell to separate the metal and a non-metallic material obtained from printed circuit boards (PCB). The bubble superficial surface rate (SB) and percentage of solids in feed was changed to evaluate the recovery of nonmetallic material in overflow product (concentrate) and the metal material in underflow (tailings). The solids content in feed is most influential parameter in nonmetallic material recovery. Finally, a flotation circuit is proposed as well as a flotation mechanism for this unconventional mix.