Process for recovering nickel, cobalt and manganese from their oxide and silicate ores

Abstract From the Canadian patent

A process for recovering the metals manganese nickel, and, cobalt from their oxides and silicates in which the metal oxide or silicate is heated with ferric chloride in the absence of air and in the presence of a volatility depressant salt which is preferably an alkaline metal chloride or ammonium chloride to form the soluble chloride of the metal followed by dissolving the metal chloride from the residue and recovering the metal from the chloride solution by electrolysis, cementation or other standard recovery procedure.