Abstract Suspension reduction kinetics of hematite ore particles at 1710 K to 1785 was described by the Johnson-Mehl-Avrami-Kolmogorov model with Avrami exponent 1.405. The apparent activation energy is 105.5 kJ mol −1 rate determining step nucleation and growth. degree endpoint a linear function temperature logarithmic oxygen potential reacting gas. A peak reaction constant particle size has b...