Acting mechanism of F,K,and Na in the solid phase sintering reaction of the Baiyunebo iron ore  

作　　者：Zhi-zhong Hao Sheng-li Wu Yi-ci Wang Guo-ping Luo Hu-lin WU Xiang-guang Duan 

机构地区：[1]School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China [2]Iron Plant, Baotou Iron and Steel Company, Baotou 014010, China [3]School of Material and Metallurgy, Inner Mongolia University of Science and Technology, Baotou 014010, China [4]Technical Center, Baotou Iron and Steel Company, Baotou 014010, China

出　　处：《International Journal of Minerals,Metallurgy and Materials》2010年第2期137-142,共6页矿物冶金与材料学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.50664006)

摘　　要：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 Na2SiO3 and Na2O·Fe2O3 and the generation of molten state in the solid phase sintering.Element F in the Baiyunebo ore facilitates the formation of cuspidine compound 3CaO·2SiO2·CaF2 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,CaF2and SiO2 react with CaO first and form 3CaO·2SiO2·CaF2 and 3CaO·2SiO2,so the formation of ferrites,Na2O·Fe2O3,and 2CaO·Fe2O3 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 Na2SiO3 and Na2O·Fe2O3 and the generation of molten state in the solid phase sintering.Element F in the Baiyunebo ore facilitates the formation of cuspidine compound 3CaO·2SiO2·CaF2 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,CaF2and SiO2 react with CaO first and form 3CaO·2SiO2·CaF2 and 3CaO·2SiO2,so the formation of ferrites,Na2O·Fe2O3,and 2CaO·Fe2O3 is inhibited.

关 键 词：iron ore solid phase sintering alkaline elements reaction temperature reaction product MECHANISM 

分 类 号：TQ174.758[化学工程—陶瓷工业] TD854.2[化学工程—硅酸盐工业]