Reducibility and Kinetic Studies of Pellets made from a Novel Multimetallic Magnetite Ore

Abstract

Reducibility and reduction kinetics of hardened pellets prepared from a novel, lean-grade multimetallic magnetite ore was investigated in the present study. The hardened pellets were reduced between the temperature range of 1223–1423 K for 30–120 min in a bed of non-coking coal. The highest reducibility and metallization of 80% and 92% were obtained at 1373 K at a reduction time of 120 min. The kinetic model “[(1 − α)−1/3 − 1]2 = kt” was found to be the best fit for the reduction of pellets. Activation energy calculated for the pellets was 165.38 kJ/mole. A metallization of up to 85% was achieved on pellets reduced at 1373 K for 90 min. © 2022, The Indian Institute of Metals - IIM.