Kromitin soda kavurması kinetiğine mekanik aktivasyonun etkisi

Authors : Kenan YILDIZ, Güven YARKADAŞ

Pages : 128-133

Doi:10.16984/saufbed.45719

View : 15 | Download : 7

Publication Date : 2010-12-01

Article Type : Research Paper

Abstract :Soda roasting kinetics of non-activated and mechanically activated chromite was investigated. It was determined that the reaction was diffusion controlled between 700 900°C and chemical reaction controlled between 900 1200°C. The activation energy of first step for soda roasting of non-activated chromite was 170 kJ/mol and this value decreased to 141.8 kJ/mol for 30 min activated chromite and 79 kJ/mol for 120 min activated chromite. The activation energies for the second step was calculated as 64.7 kJ/mol for non-activated chromite, 43 kJ/mol for 30 min activated chromite and 25.1 kJ/mol for 120 min activated chromite. Mechanical activation reduced the activation energy for the soda roasting of chromite.
Keywords : kromit, kromat, soda kavurması kinetiği, mekanik aktivasyon