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  • 1 Beijing University of Science and Technology Beijing 100083 P. R. China Beijing 100083 P. R. China
  • | 2 Beijing General Research Institute of Non-Ferrous Metals Beijing 100088 P. R. China Beijing 100088 P. R. China
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Abstract  

The kinetics of direct reduction of artificial chrome iron ore was studied by isothermal and non-isothermal methods. In the initial, middle and final periods, the reaction is controlled by nucleation and growth, a phase boundary reaction, and diffusion, respectively. In the main reaction region, the kinetic equation is 1–(1–)1/3=kt and the apparent activation energy is 270 kJ mol–1. The kinetic mechanisms found with the isothermal and non-isothermal methods do not differ, and the activation energy values are approximately the same. However, the non-isothermal method can demonstrate the kinetic process completely.

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