Study of kinetics and mechanisms of iron ore reduction in ore/coal composites
Abstract
The kinetics and mechanisms of iron ore reduction in solid state in ore/coal composites were studied and a non-isothermal, non-isobaric mathematical model was developed. Heat transfer is shown to be the dominant rate limiting step to overall reaction in the ore/coal composite. An increase in heat flux may be achieved by increasing the temperature of heat source and increasing effective thermal conductivity by various means. For practical applications, the size of agglomerates (briquettes and pellets), the mechanism of external heat transfer to the agglomerate are the most important factors in process design.