Method of recycling nickel and cobalt alloy scrap metal contaminated with titanium

摘要

The process for removing titanium metal and alloys from nickel metal, nickel metal alloys, cobalt metal and cobalt metal alloys by leaching out the titanium metal and/or alloys with a hydrofluoric acid solution, oxidizing Ti+3 to Ti+4 salts in the leached metals or alloys with an aqueous oxidant, and rinsing the leached metal with water to yield nickel metal, nickel metal alloys, cobalt metal, and/or cobalt metal alloys substantially free of titanium and tin.