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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 Baiyunebo 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_2and 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.
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 Baiyunebo ore facilitates the formation of cuspidine compound 3CaO · 2SiO_2 · CaF_2 in the solid phase reaction. 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 2 Fe 2 O 3, and 2CaO · Fe 2 O 3 is inhibited.