As an afterthought, iron, nickel, arsenic, cobalt and zinc dissolve as sulphates, while the platinum metals, with selenium, tellurium, lead, bismuth, tin and antimony deposit in the anode slime with the gold and silver. So on the face of it, copper scrap can be reprocessed to produce electrical quality copper.
Last edited by Alan Belson; 04/24/07 06:43 PM. Reason: spelling error