| Title |
On the Study of Oxidation Kinetics of Molybdenite Powder |
| Authors |
김준수(Jun Soo Kim); 조민희(Min Hee Cho); 오재현(Jae 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. |