Recovery of cobalt from slag in a DC arc furnace at Chambishi, Zambia
A study by R.T. Jones et al. Published in 2002 in the Journal of the SA Inst. Min. Met.
Persians used Co to colour glass in 2250 BC Metallic cobalt isolated in 1735 by Brandt Co
Metal-bearing species remain in solid phase Gas-solid reactions only
Drying thermal removal of water from solids Sintering partial fusion to form an agglomerate Calcining thermal decomposition of solids for the remova
How are pyrometallurgical reactors heated?
Combustion of fuel (solid or liquid or gas) Combustion of sulphide ore Electrical (arc or slag resistance) Gas preheating Indirect heating
Modes of heating
Conduction Convection Radiation
Containment of high-temperature (often molten) products Insulation prevent excessive loss of energy Maintain shape and mechanical strength Most common temperature-resistant (`refractory') materials are based on the oxides S
Thermodynamics vs. kinetics
THERMODYNAMICS KINETICS what DOES happen data rarely available data determined for each individual system temperature sensitivity highly variable - Eact vital for equipment design
what SHOULD happen data generally ava
What does Pyrometallurgy mean?
Extractive Metallurgy deals with the production of metals Pyro is from the Greek word for fire () Pyrometallurgy is the art and science of extracting metals by thermal methods
Economic importance of pyrometallu