Geo
Well-known member
zinc (or die cast) is the fastest way to drop copper from solution but difficult to find in large enough quantity. some automotive carburetors are made of zinc. both aluminum and zinc will react the same way very vigorously and create alot of fumes and heat,so if you use either of these add your reagent in small increments and wait till the whole piece has been dissolved before adding another. as far as contaminating both aluminum and zinc will burn away before your copper is fully smelted.