Nickel Source Extensive nickel ore mining is carried out in New Caledonia and in Ontario, Canada.
Sulfide ore is crushed and the sulfides are separated by flotation.
Nickel and copper sulfides are further separted by another float. Nickel sulfides are roasted, which removes some sulfur, and then undergo a Bessemer type process. Impurities are removed by oxidation. A mixture of molten copper, nickel, and iron sulfide is obtained after further chemical treatment. Segregation occurs during cooling.