Volume 5, Issue 1 (winter 2008 2008)                   IJMSE 2008, 5(1): 22-28 | Back to browse issues page

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A. Ataie1,, S. Heshmati-Manesh1,, S. Sheibani1,, G. R. Khayati,Y. Firozbakht. SOLID STATE REDUCTION OF CHROMITE IN HIGH CARBON FERROCHROMIUM-CHROMITE COMPOSITE PELLETS. IJMSE 2008; 5 (1) :22-28
URL: http://ijmse.iust.ac.ir/article-1-127-en.html
SOLID STATE REDUCTION OF CHROMITE IN HIGH CARBON FERROCHROMIUM-CHROMITE COMPOSITE PELLETS
A. Ataie1, , S. Heshmati-Manesh1, , S. Sheibani1, , G. R. Khayati,Y. Firozbakht
Abstract:   (35323 Views)
Abstract: 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.
Keywords: Reaction Kinetics, Solid State Reduction, Ferrochromium, Activation Energy.
     
Type of Study: Research Paper |
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