二元碱度对CaO-SiO_(2)-Al_(2)O_(3)-CeO_(2)-La_(2)O_(3)渣系黏度和熔渣结构的影响  

Effect of Binary Basicity on Viscosity and Structure of CaO-SiO_(2)-Al_(2)O_(3)-CeO_(2)-La_(2)O_(3) Slag

作　　者：赵付恒 辛文彬 邓永春[1,2] 张婧[1,2] 姜银举[1,2] 曹祚君 王利勇 ZHAO Fuheng;XIN Wenbin;DENG Yongchun;ZHANG Jing;JIANG Yinju;CAO Zuojun;WANG Liyong(School of Rare Earth Industry(School of Rare Earth Engineering and Technology),Inner Mongolia University of Science and Technology,Baotou,014010,Inner Mongolia,China;Key Laboratory of Green Extraction&Efficient Utilization of Light Rare-Earth Resources of Ministry of Education,Inner Mongolia University of Science and Technology,Baotou 014010,Inner Mongolia,China)

机构地区：[1]内蒙古科技大学稀土产业学院(稀土工程技术学院),内蒙古包头014010 [2]内蒙古科技大学轻稀土资源绿色提取与高效利用教育部重点实验室,内蒙古包头014010

出　　处：《矿冶工程》2025年第1期92-96,102,共6页Mining and Metallurgical Engineering

基　　金：国家自然科学基金(52164035);内蒙古科技大学基本科研业务费专项资金资助(037)。

摘　　要：为合理选择熔渣成分以服务于含稀土熔渣高效富集稀土,采用旋转柱体法和红外光谱、拉曼光谱、X射线光电子能谱研究了不同二元碱度条件下混合稀土渣系的黏度和熔体结构。结果表明:二元碱度为0.50、0.86、1.00、1.20时,1550℃下渣系对应的黏度分别为1.30、0.87、0.60、0.36Pa·s,对应的活化能分别为268、220、216、202kJ;Q^(1)(Si)和Q^(2)(Si)在熔渣中的面积分数均在24%以上;随着二元碱度增加,桥氧(O^(0))面积分数减少,非桥氧(O^(-))和自由氧(O^(2-))面积分数增加,代表熔渣聚合度的K值逐渐从0.53降至0.10。随着二元碱度增加,熔渣结构体系趋于简单化是混合稀土渣系黏度降低的主要原因。To reasonably select the composition of molten slag for efficient enrichment of rare earth elements therein,the viscosity and melt structure of mixed rare earth slag under different binary basicity conditions were explored using rotating cylinder method,FTIR,Raman spectroscopy,and X-ray photoelectronic spectroscopy.The results show that with the binary basicity of 0.50,0.86,1.00,and 1.20 respectively,the corresponding viscosity of the slag system at 1550℃is 1.30,0.87,0.60,and 0.36 Pa·s,and the activation energy of the viscous flow unit is 268,220,216,202 kJ respectively;the area fractions of Q_(1)(Si)and Q_(2)(Si)in the molten slag are all more than 24%.As the binary basicity increases,the area fraction of bridging oxygen(O^(0))decreases,and the area fractions of non-bridging oxygen(O^(-))and free oxygen(O^(2-))decrease,and the K value representing the polymerization degree of slag gradually decreases from 0.53 to 0.10.It is found that the structure system of molten slag tends to be simple with the increase of binary basicity,which is the main reason for decrease in the viscosity of a mixed rare earth slag.

关 键 词：稀土渣 碱度 黏度 熔渣结构 稀土 结晶相 渣系 

分 类 号：TF04[冶金工程—冶金物理化学]