Abstract
The intrinsic kinetics of the selective chlorination of iron from ilmenite ore using carbon monoxide as the reducing agent were studied in a shallow fluidized bed. Experiments on the effects of chlorination temperature, carbon monoxide and chlorine gas partial pressures, and particle size were conducted in the absence of mass- and heat-transfer influences. Results indicate that the kinetics in the temperature range 923 to 1123 K are represented by the following pore-blocking rate law: λ[ exp (XFe/λ) − 1 ] = 33.7 exp (− E/RT)p 0.52co 0.322 t where E is 37.2 kJ/mol and p and t are in atm (=101.3 kPa) and minutes, respectively. The partial pressure of carbon monoxide was found to affect the chlorination rate more strongly than that of chlorine. A reaction mechanism in which iron in ilmenite reacts with chlorine before the liberated oxygen is removed by carbon monoxide is proposed.
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Formerly Graduate Student at the Department of Metallurgical Engineering, University of Utah
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Rhee, K.I., Sohn, H.Y. The selective chlorination of iron from llmenite ore by CO-Cl2 mixtures: Part I. intrinsic kinetics. Metall Trans B 21, 321–330 (1990). https://doi.org/10.1007/BF02664200
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DOI: https://doi.org/10.1007/BF02664200