| The method of recovering Au from the electronic waste is studied in this paper which containing Cu, Sn and Ni and Au coated on the surface. Disassembling and cleaning the electronic waste, sorting out the metal parts, and then adding concentrated nitric acid solution to the metal parts for reaction, filtering to obtain filter residue and washing to neutral. Then the concentrated hydrochloric acid solution is added to the filter residue and heated. When the solution becomes clear, it is filtered and washed, and dried to obtain Au foil. The Au recovery rate is more than 99%, the recovered Au foil purity is more than 99%. |
