Kinetics of Iron Chlorination of Roasted Illmenite Ore, Fe 2 TiO 5 in a Fluidized-Bed Reactor
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ture, and so forth, are important factors in studying the chlorination rate, and their effects have been examined experimentally in this study. The bubble assemblage model (BAM)5 has been applied to interpret experimental observations, with the assumption that the chlorination reaction of iron can be treated by an unreacted shrinking core model with a constant external radius, and is controlled by an irreversible chemical reaction. Reasonable agreement has been shown between experimental results and BAM simulations with the above mentioned reaction mode. EXPERIMENTALS 1) Experimental Apparatus A schematic representation of the experimental apparatus used in this study is shown in Fig. 1. A fluidized bed reactor of 60 em in length and 5 em in diam, and made of vitreous quartz, was externally heated in a Kanthal resistance furnace. The reactor tube has two openings at its top, one for a thermocouple and the other for sampling of the reacted ore in the bed. Flow rates of chlorine and argon, the reactant gases, were measured by flow meters, mixed,
Fe 2Ti05(s) + 3Cb{g) + 3/2C(s) - 2FeCh{g) + 3/2 C02(g) + Ti0 2 (s ).
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This study was carried out to investigate the relation between roasted ore morphology and preferential chlorination of iron, as well as to investigate the effects of operational variables on the reaction rate in the fluidized-bed chlorinator. The roasted ore morphology and phases produced by roasting are dependent on roasting temperature," Process variables of the chlorination reaction, such as the amount of coke added, the chlorine gas partial pressure, reaction temperaA. FUWA, formerly with Mitsubishi Metal Research Institute, is now New York Representative, Mitsubishi Metal Corporation, 277 Park Avenue, New York, NY 10017. E. KIMURA is Research Engineer, Mitsubishi Metal Research Institute, Ohmiya-City, Saitarna, Japan 330. S. FUKUSHIMA, formerly with Mitsubishi Metal Research Institute, is now Professor Graduate School of Engineering, Muroran Institute of Technology, Japan. Manuscript submitted March 18, 1977. METALLURGICAL TRANSACTIONS B
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