Carbothermal reduction kinetics of mechanically activated chromite with graphite

Abstract

The carbothermal reduction kinetics of mechanically activated chromite with graphite under an argon atmosphere was investigated at temperatures between 1100 and 1400°C. Zhuravlev-Lesokhin-Tempelman (ZLT) method was used in the reduction kinetics for non-activated chromite and the activation energy was calculated as 401.7 kJ/mol. Solid-state diffusion method was used in the reduction kinetics for 60 min-activated chromite and the activation energy was calculated as 283.3 kJ/mol. This decrease in activation energy was due to structural disordering in chromite structure by mechanical activation.

Keywords

• kromit, karbotermal redüksiyon, kinetik, mekanik aktivasyon