ABSTRACT
Falconbridge Also called the matte leach process. A process for extracting copper and nickel from matte (a sulde ore that has been roasted to remove most of the sulfur). Most of the nickel is leached out with hydrochloric acid and recovered as nickel chloride crystals. The leach residue is roasted and leached with sulfuric acid to dissolve the copper. The process has been operated in Canada and Norway since 1970.
