발간논문

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Vol.21, No.7, 619 ~ 628, 1983
Title
On the Study of Oxidation Kinetics of Molybdenite Powder
김준수Jun Soo Kim, 조민희Min Hee Cho, 오재현Jae Hyun Oh
Abstract
Oxidation roasting of molybdenite powder was carried out to study the effect of temperature and oxygen concentration on the oxidation rate. The results obtained in these experiments are as follows; 1) According to thermogravimetric analysis, the oxidation of 270/325 mesh molybdenite begins at about 300℃ and the rate of oxidation increases with increasing temperature especially above 500℃. 2) The oxidation rate of molybdenite increases with the increasing oxygen concentration and reaction temperature. But above 550℃ molybdenum is lost by the vaporization of MoO₃. 3) The overall oxidation rate of molybdenite at the temperature range of 445-545℃ predominantly controlled by diffusion rate of oxygen through the MoO₃layer, and the apparant activation energy of the process is evaluated as 16㎉/mole.
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