Pelletising-sintering, prereduction, and smelting of Greek chromite ores and concentrates

 
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1993 (EN)
Pelletising-sintering, prereduction, and smelting of Greek chromite ores and concentrates (EN)

Vazarlis, HG (EN)
Lekatou, A (EN)

N/A (EN)

A study on the pelletising-sintering, prereduction, and smelting of (mainly) Greek chromites is presented. The compressive strength of fired chromite pellets was shown to be affected negatively by an increase of the content of the gangue of chromite and affected positively by increases of the proportion of fines in the pelletising mix up to 75%-74 mum, of the content of the dust recovered from industrial production of high carbon ferrochromium, and of the pellet diameter. Very satisfactory degrees of prereduction of Greek chromites were attained, which were strongly dependent on parameters such as temperature, time, variations of carbon addition, particle size of reactants, chromite composition, and type of carbonaceous reducing agent. A preliminary kinetic study suggests that the diffusion of carbon through the reduction products is the rate limiting step of the prereduction of Greek chromites. Satisfactory high carbon ferrochromium was produced by smelting Greek chromites, using coke of Greek lignite as reductant. (EN)

journalArticle

Greece (EN)
Chromite (EN)
Chromite ores concentrates (EN)
Reduction (EN)
Prereduction (EN)
Smelting (EN)
Sintering (EN)
Chromite ore treatment (EN)
Pelletizing (EN)
Chromium ore treatment (EN)

Εθνικό Μετσόβιο Πολυτεχνείο (EL)
National Technical University of Athens (EN)

Ironmaking and Steelmaking (EN)

1993


INST MATERIALS (EN)



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