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The Mutanda Mine (French: Mine de Mutanda) is an open-pit copper and cobalt mine in the Lualaba Province of the Democratic Republic of the Congo (DRC). It is the largest cobalt mine in the world. Accidents and spills at the mine have killed workers and polluted nearby rivers and fields.
The residue is removed. A feed of matte and sulfide concentrate containing approximately 0.4% cobalt and 30% sulfur is pressure leached at elevated temperature and pressure in an ammoniacal solution to produce a solution of nickel, copper and cobalt. By boiling away the ammonia; copper is precipitated as a sulfide and sent to a smelter.
Copper ore, open pit, heap leached 10–15 (2018) [9] 17 Miami: Gila County, Arizona: Freeport-McMoRan: Copper ore, leached 5 (2021) [2] 18 Carlota Gila County, Arizona: KGHM Polska Miedź: Porphyry copper open pit, producing copper cathode 3.2 (2018) [10] 19 Pumpkin Hollow (see Anaconda) Lyon County, Nevada: Nevada Copper
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Not all copper deposits contain significant cobalt, but nearly all cobalt in the country is sourced from copper deposits. The DRC produces about 63% of the world's cobalt, with about 80% from industrial copper mines, and the remaining 20% gathered by artisanal mining. [2]
The Australian owner of a cobalt mine in Central Idaho plans more extensive study of cobalt at a remote site in the Salmon River Mountains, and the potential for a cobalt refinery, after securing ...
The mine operated from 1985-1988, during which period it produced 9.8 million tonnes of ore at an average grade of 4.96% copper and 0.35% cobalt. The pit was allowed to flood in 1998 for lack of funds. After acquiring the mine, Katanga Mining had plans to restart operations. [4]