Recovering Valuable Metals from Cobalt-manganese Crusts.
Proc Pacific Congress on Marine Science & Tech Honolulu Hi 1988 May; :Mrm3/39-41
This Bureau of Mines paper reviews several chemical processes for extracting metals from cobalt-rich manganese crust ores and concentrates. These crusts represent a significant seabed mineral deposit of the Pacific exclusive economic zone and an important resource of cobalt, nickel, and perhaps manganese. Three hydrometallurgical extraction processes--sulfuric acid oxidation pressure leaching, aqueous sulfur dioxide leaching, and hydrogen peroxide leaching--have been investigated. The first two methods have been previously tested and proved capable of extracting valuable metals from similar land-based or seabed resources. All three methods show promise in treating ocean crust materials and have resulted in metal extractions exceeding 95 pct.
Proc. Pacific Congress on Marine Science & Tech Honolulu, Hawaii, May 16- 20, 1988, Pp Mrm3/39-41