Industrial NSC Hydrometallurgical Precious Metals Recycle

The use of nitric acid in metal sulfide oxidation is not new. Many derivations of the technology have been researched and piloted for applications such as copper, nickel and precious metals. Again, as noted in Table 1, and as specifically applied to copper concentrates and precious metals, only the nitrogen species catalyzed (NSC) acid pressure leach has ever been built and operated successfully on an industrial scale [1].