Analysis of Kinetic Parameters of Molybdenite Oxidation Roasting Based on the Multiple Scanning Rate Method
Faculty of Metallurgy and Energy Engineering，Kunming University of Science and Technology，Yunnan Provincial Key
Laboratory of Intensification Metallurgy, The Key Laboratory of Unconventional Metallurgy Ministry of Education, Kunming University of Science and Technology, Kunming 650093, China
Abstract：The oxidative roasting behaviors of Molybdenite were investigated using thermogravimetric analysis (TG) and X-ray diffraction (XRD) techniques at various heating rates. The results showed that under the air atmosphere, the weight loss step, the maximum weight loss rate peak on DTG were in good agreements with the endothermic and exothermic peaks on DSC of the Molybdenite oxidative roasting process. At 800 ℃, the oxidized roasting product of Molybdenite was ?-MoO3. The activation energies of the Molybdenite oxidizing roasting process at 500-650 ℃ were calculated by Flynn-wall-ozawa method and Kissinger method. The activation energies decreased first and then increased with the change of conversion rate. The apparent activation energies were 76.1 and 70.4 kJ/mol, respectively.
Yu Wenchao,Liu Binguo,Zhang Libo et al. Analysis of Kinetic Parameters of Molybdenite Oxidation Roasting Based on the Multiple Scanning Rate Method[J]. 化学反应工程与工艺, 2018, 34(4): 359-364.
