Decomposition reaction kinetics of Baotou RE concentrate with concentrated sulfuric acid at low temperature |
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| Authors: | Xiuyan Wang Jiemin Liu Mei Li Huili Fan Qishan Yang |
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| Affiliation: | 1. Department of Chemistry, University of Science and Technology Beijing, Beijing 100083, China
2. School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou 014110, China |
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| Abstract: | Baotou RE concentrate was decomposed with concentrated sulfuric acid by controlling the roasting temperature below 500°C.
Thermogravimetry-differential thermal analysis (TG-DTA) and chemical analytical methods were used to study the thermal decomposition
process and the thermal decomposition effect. The Freeman-Carroll method was applied to analyze the TG-DTA curves. The activation
energy, reaction order, and reaction frequency factor at different stages were calculated. The Satava method was used to deduce
the reaction mechanism and the relative reaction rate during the thermal decomposition process. |
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| Keywords: | roasting rare earths concentrate TG-DTA reaction kinetics |
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