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Acting mechanism of F, K, and Na in the solid phase sintering reaction of the Baiyunebo iron ore |
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| Authors: | Zhi-zhong Hao Sheng-li Wu Yi-ci Wang Guo-ping Luo Hu-lin Wu Xiang-guang Duan |
| Affiliation: | 1. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China;Iron Plant, Baotou Iron and Steel Company, Baotou 014010, China 2. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China 3. School of Material and Metallurgy, Inner Mongolia University of Science and Technology, Baotou 014010, China 4. Techrucal Center, Baotou Iron and Steel Company, Baotou 014010, China 5. Iron Plant, Baotou Iron and Steel Company, Baotou 014010, China |
| Abstract: | The effect of F, K, and Na on the solid phase reaction of the Baiyunebo iron ore was investigated by differential thermal analysis (DTA) and X-ray diffraction (XRD). It has been identified that alkaline elements K and Na in the Baiyunebo ore instigate the formation of low melting point compounds Na_2SiO_3 and Na_2O·Fe_2O_3 and the generation of molten state in the solid phase sintering. Element F in the Bai yunebo ore facilitates the formation of cuspidine compound 3CaO·2SiO_2·CaF_2 in the solid phase reaction. The cuspidine compound is kept in solid as one of the final products through the entire sintering process due to its high melting point. In the sintering process, CaF_2 and SiO_2 react with CaO first and form 3CaO·2SiO_2·CaF_2 and 3CaO·2SiO_2, so the formation of ferrites, Na_2O·Fe_2O_3, and 2CaO·Fe_2O_3 is inhibited . |
| Keywords: | iron ore solid phase sintering alkaline elements reaction temperature reaction product mechanism |
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