Reduction of Iron Ore Pellets

Abstract

In this work, influence of temperature & reduction kinetic on extent of reduction of iron ore pellet of size 15-17 mm in diameter is observed. Iron ore fines of -72 mesh size is mixed with bentonite as binder for pellet preparation. Structural property of reduced iron ore pellet is observed. Reduction kinetics rises with increase of temperature. However with considerable duration of reduction, rate of reaction decreases. Change in volume of iron ore pellet rises with increase in temperature, however when reduction temperature ranges above 950°C, lesser extent of change in volume occurs. Activation energy obtained for reduction of iron ore (hematite) pellet is 10.04 kJ. Change in volume of iron ore pellet increase with reduction time and after reaching around 80-90% of reduction, amount of change in volume of pellet decreases.