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SOLID STATE REDUCTION OF CHROMITE IN HIGH CARBON FERROCHROMIUM-CHROMITE COMPOSITE PELLETS
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نویسنده
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Ataie A. ,Heshmati-Manesh S. ,Sheibani S ,Khayati G.R ,Firozbakht Y. ,Sargheini J.
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منبع
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iranian journal of materials science and engineering - 2008 - دوره : 5 - شماره : 1 - صفحه:22 -28
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چکیده
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: in this paper solid state reduction of high carbon ferrochromium-chromite composite pellets in the temperature range of 900-1350°c was investigated. a two stage reduction mechanism is proposed. the first stage is likely to be controlled by the chemical reaction with activation energy of 127.2kj/mol. in the second stage, solid state diffusion of carbon through the reaction product layer is suggested to be rate controlling. the activation energy of this stage was calculated to be 93.1kj/mol. the reduction process was found to be favored by high temperatures as well as high vacuum. the results also show that pre-milling of initial mixture has a negative effect on the reduction degree.
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کلیدواژه
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Reaction Kinetics ,Solid State Reduction ,Ferrochromium ,Activation Energy
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آدرس
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university of tehran, Faculty of Engineering, Department of Metallurgy and Materials Science Engineering, ایران, university of tehran, Faculty of Engineering, Department of Metallurgy and Materials Science Engineering, ایران, university of tehran, Faculty of Engineering, Department of Metallurgy and Materials Science Engineering, ایران, university of tehran, Faculty of Engineering, Department of Metallurgy and Materials Science Engineering, ایران, university of tehran, Faculty of Engineering, Department of Metallurgy and Materials Science Engineering, ایران, South Tehran Unit of Azad University, ایران
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پست الکترونیکی
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sheibani_s@engmail. ut.ac. ir
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Authors
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