POLYMET MINING CORPORATION'S NORTHMET PROCESS DEVELOPMENT

摘要

Recent process development work for the recovery of copper, nickel, cobalt and precious metals (Au, Pt, Pd) from PolyMet's NorthMet deposit is described. The process uses a number of flotation process steps combined with hydrometallurgical treatment to produce a range of possible products including copper and nickel flotation concentrates for custom smelting, mixed nickel and cobalt hydroxide for refining and a precious metal precipitate for treatment.