This indicated that the leaching of Co from the Co ore was controlled by an interfacial chemical reaction, and then the developed leaching kinetics model of the Co can be expressed as $1-\ $ × t. 27 Atomic Weight: 58.933195 (5) Melting Point: 1768 K (1494C, 2722F) Boiling Point: 3200 K (2926C, 5300F) Density: 8. PDF This presentation outlines key aspects of cobalt properties, production and applications. 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. The leaching kinetics of Co showed that the apparent activation energy of Co leaching was 76.07 kJ/mol (i.e., in the range of 40–300 kJ/mol). The present bioleaching process of cobalt is worth using for reference to deal with low-grade cobalt ores. The results revealed that the leaching ratio of Co can reach up to 95.61% using (NH 4) 2SO 4 as a leaching agent under the following materials and conditions: (NH 4) 2SO 4 concentration 300 g/L, reductant dosage 0.7 g, leaching temperature 353 K, reaction time 4 h, and liquid–solid ratio 6 mL/g. General Information Cobalt is a naturally-occurring, silvery-grey magnetic metal with properties similar to iron and nickel. This process was simple and environmentally friendly. An ammonia-based system was used to selectively leach cobalt (Co) from an African high-silicon low-grade Co ore, and the other elemental impurities were inhibited from leaching in this process. Cobalt (pronounced /koblt/) is a hard, lustrous, grey metal, a chemical element with symbol Co.
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