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• COBALT ORE DENSITY SERIES

From this cobalt is recovered by electrorefining or carbonate precipitation. The ores are then treated with hydrochloric acid and chlorine, or with sulfuric acid, to create a leach solution that is purified. Arsenide ores are roasted to remove the majority of arsenic oxide.Pressure leaching with air, sulfuric acid, and ammonia recover more nickel before cobalt powder is added as a seed to precipitate cobalt in a hydrogen gas atmosphere. The leaching residue can be sent to a smelter for copper recovery.

It is found that 96.51 Co and 26.32 Cu can be selectively extracted from the cobalt tailings at 10 pulp density after direct bioleaching for four days.

COBALT ORE DENSITY SERIES

Both copper and nickel are both removed in a series of chemical reduction processes, leaving only nickel and cobalt sulfides. The present bioleaching process of cobalt is worth using for reference to deal with low-grade cobalt ores. Cobalt is a ferromagnetic metal and is used primarily. In this process, sulfide concentrate containing less than 1% cobalt is pressure leached at high temperatures in an ammonia solution. Cobalt produces brilliant blue pigments which have been used since ancient times to color paint and glass. In Cobalt, the silver in the ore was more dense than the gangue. Cobalt-containing nickel sulfide ores are treated using the Sherritt process, named after Sherritt Gordon Mines Ltd. Properties Cobalt has a melting point of 1495☌, boiling point of 2870☌, specific gravity of 8.9 (20☌), with a valence of 2 or 3. Gravity separation allows minerals to be separated because of the differences in density.Cobalt metal can then be refined from this using electrolysis, before being crushed and degassed to produce a pure, commercial-grade metal.

Impurities (iron, nickel, copper, zinc) are removed, and cobalt is precipitated in its hydroxide form using lime.