期刊
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
卷 25, 期 7, 页码 2415-2421出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S1003-6326(15)63857-2
关键词
high iron gibbsite ore; thermal decomposition kinetics; activation energy; pre-exponential factor; Popescu method
资金
- National Natural Science Foundation of China [51374058]
The thermal decomposition kinetics of high iron gibbsite ore was investigated under non-isothermal conditions. Popescu method was applied to analyzing the thermal decomposition mechanism. The results show that the most probable thermal decomposition mechanism is the three-dimensional diffusion model of Jander equation, and the mechanism code is D3. The activation energy and pre-exponential factor for thermal decomposition of high iron gibbsite ore calculated by the Popescu method are 75.36 kJ/mol and 1.51x10(5) s(-1), respectively. The correctness of the obtained mechanism function is validated by the activation energy acquired by the iso-conversional method. Popescu method is a rational and reliable method for the analysis of the thermal decomposition mechanism of high iron gibbsite ore.
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