Impact of mechanical strength of green iron ore pellets on the pelletizing process

CIM Montreal 2007
Abstract Good mechanical strength of green iron ore pellets is fundamentally required to avoid breakage and excessive deformation during their handling. However, achieving a minimum quality of green balls, that will allow them to survive handling, might not be optimum for the induration process. Measurements of bed void fraction, green balls sphericity as well as bed permeability were carried out on various samples of green iron ore pellets having different mechanical strength. Results show that bed void fraction, sphericity and permeability all depend, to some extent, upon green ball mechanical strengths. Understanding and controlling the mechanical strength of green iron ore pellets would then help to maximize both the productivity of the induration process as well as the quality of fired pellets.
Keywords: Green pellet properties, Permeability, Pelletizing, Induration process
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