![]() All must be removed in order to produce high-purity Co hydroxide. The major impurities in the Co-rich solvent extraction aqueous raffinate are Fe, Al, Mn, and Cu. (2.2.28) CuO s in chrysocolla + H 2 SO 4 ℓ sulfuric acid in water → 30 ° C Cu 2 + aq + SO 4 2 − aq + H 2 O ℓ pregnant aqueous solutionĬu 2 + and Co 2 + are separated from each other by extracting Cu 2 + into an organic extractant while leaving Co 2 + in the aqueous “raffinate.” The extractant is most commonly LIX 984N, a 50/50 mixture of C9 aldoxime and ketoxime dissolved 20–35 vol.% in Shellsol 2325-a low flash point petroleum distillate. In some regions, the layers have been folded by tectonic forces so that the deposits are vertical or even inverted. The main gangue minerals are dolomite and quartz. Both layers also contain Cu minerals, such as chrysocolla and malachite in the weathered “oxide” cap and chalcocite and digenite in the bottom sulfide. This section discusses the processing of copper–cobalt ores as historically these ores produced the majority of the world’s cobalt and may again soon with the development of mining projects that is occurring at this time.Ĭentral African copper–cobalt deposits usually consist of two layers: (1) a weathered “oxide” surface-containing mainly heterogenite CoOOH and (2) unweathered Cu,Co “sulfide” deposits below these “oxide” caps-containing mainly carrollite Co 2CuS 4. The remaining ~ 15% is produced from other primary sources, such as Moroccan cobalt–arsenic ores. While most cobalt (~ 50%) is produced as a coproduct from the processing of nickel/ cobalt ores, a significant amount of cobalt (~ 35%) is produced from Central African copper–cobalt ores. Davenport, in Treatise on Process Metallurgy: Industrial Processes, 2014 2.2.6 Cobalt from Central African Copper–Cobalt Ores
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |