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Technical and Business Considerations of Cobalt Hydrometallurgy

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By 1939, yearly world output had reached 4,500 MT, of which 75% came from Africa.4 Cobalt prices were high, but stable and ranged from $ 1 .75-2.50/Ib for four decades (1 925-1 965).5 For clarification, since the early 1930s cobalt was primarily found and mined in Katanga, Zaire (Democratic Republic of Congo) and Rhokana, Zambia as a valuable by-product from copper produc- tion. These unique copper deposits and their colonial rulers deter- mined the growth potential of the cobalt market.

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