Abstract
This paper presents the main kinetic parameters for the reoxidation of direct reduced iron (DRI) samples in air under non-isothermal conditions and compares the data with isothermal kinetic parameters for a typical DRI sample. It is found that the non-isothermal activation energy (Δ E) values are less than the isothermal Δ E values. For coal based DRI, the non-isothermal Δ E values lie in the range 20–35 kJ mol −1. For gas based DRI the value is much higher, about 55kJ mol −1. For the reoxidation of DRI, the kinetic compensation effect (KCE) has been found to be valid.
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