Effect of Ce_(2)O_(3)and CaF_(2)on viscosity and structure of CaO-SiO_(2)-CaF_(2)-Ce_(2)O_(3)slag  

作　　者：Wentao Guo Xiangjun Liu Fang Liu Yongli Jin Zuolin Sun Ziqi Ding Zengwu Zhao 

机构地区：[1]Inner Mongolia Autonomous Region Carbon Neutrality Collaborative Innovation Center,School of Materials Science and Engineering,Inner Mongolia University of Science&Technology,Baotou,014010,China [2]School of Mechanical Engineering,Inner Mongolia University of Science&Technology,Baotou,O1410,China [3]Key Laboratory of Green Extraction&Efficient Utilization of Light Rare-Earth Resources(Inner Mongolia University of Science and Technology),Ministry of Education,School of Rare Earth Industry,Baotou,014010,China [4]Schoolof Materials Science and Engineering,Inner Mongolia University of Technology,Hohhot,0000,China

出　　处：《Journal of Rare Earths》2025年第3期620-627,I0008,共9页稀土学报(英文版)

基　　金：Project supported by the Inner Mongolia University of Science and Technology Basic Research Business Fee Project(2022QNJS068,2024QNJS132);Inner Mongolia Autonomous Region Scientific and Technological Achievements Transformation Project(CGZH2018153);Inner Mongolia Autonomous Region Science and Technology Innovation Guidance Incentive Fund(0406041703);Project of Natural Science Foundation of Inner Mongolia(2024SHZR2341)。

摘　　要：The influence of the growth of rare earth on the viscosity during the uniform cooling of CaO-SiO_(2-)CaF_(2)-Ce_(2)O_(3)slag was investigated by the high temperature viscometer.The results show that Ce_(2)O_(3)affects the viscosity variedly before and after the break temperature.At higher temperatures Ce_(2)O_(3)reduces the viscosity.When the temperature is below the break temperature,at a Ce_(2)O_(3)content of≥3 mol%,a rareearth crystalline phase is observed during the slag cooling process,and the break temperature progressively increases with the increase of Ce_(2)O_(3)concentration.There are no crystallized rare earths in the slag under the condition of Ce_(2)O_(3)concentration lower than 3 mol%.Too low or too high CaF_(2)content is found to be unfavorable for rare-earth crystallisation.The increase of Ce_(2)O_(3)content facilitates the depolymerization of silica-oxygen tetrahedral structure.Ca-F bond exists between structural units,weakening the flow resistance of structural units and lowering the viscosity of slag.

关 键 词：Ce_(2)O_(3) VISCOSITY RE crystallization Silica tetrahedron structure Rare earths 

分 类 号：TF111.3[冶金工程—冶金物理化学]