Volume 5, Issue 1 (winter 2008 2008)
IJMSE 2008, 5(1): 22-28 |
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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
URL: http://ijmse.iust.ac.ir/article-1-127-en.html
Abstract: (36500 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.
Type of Study: Research Paper |
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