LiF-DyF3-Cu2O-Dy2O3熔盐体系的粘度特性研究  

Viscosity Characteristics of LiF-DyF3-Cu2O-Dy2O3 Molten Salt System

作　　者：廖春发 林觉远 蔡伯清 陈淑梅 王旭 曾颜亮 Liao Chunfa;Lin Jueyuan;Cai Boqing;Chen Shumei;Wang Xu;Zeng Yanliang(Jiangxi University of Science and Technology,School of Metallurgy and Chemical Engineering,Ganzhou 341000,China)

机构地区：[1]江西理工大学冶金与化学工程学院

出　　处：《中国稀土学报》2019年第5期589-595,I0003,共8页Journal of the Chinese Society of Rare Earths

基　　金：国家自然科学基金项目(5167041092,51564015)资助

摘　　要：熔体粘度对熔盐电解过程中金属与熔盐的有效分离、炉膛及电极寿命等具有显着影响。因此,运用旋转法对制取Dy-Cu合金的LiF-DyF3-Cu2O-Dy2O3熔盐体系粘度进行了研究。考察了温度、单一氧化物(Dy2O3或Cu2O)及混合氧化物(Dy2O3与Cu2O)添加对熔盐体系粘度的影响。同时,通过Arrehnius公式验证了熔盐粘度与温度的关系,计算并分析了粘度活化能的变化规律。研究结果表明:在温度为910-1030℃范围内,LiF-DyF3熔盐体系的粘度均随着温度的升高及单一氧化物(Dy2O3或Cu2O)添加量的增大而降低,随熔盐中Dy2O3与Cu2O质量比的增大而升高;粘度活化能随单一氧化物(Dy2O3或Cu2O)添加量的增大而增大。熔盐电解制备Dy-Cu合金适宜温度为970-1000℃,WCu2O+W(Dy2O3)=2.0%(质量分数)且:W(Cu2O):W(Dy2O3)比值为1:0.5。Melt viscosity has significant influence in furnace hearth and electrode life and the effective separation of metal and molten salt during molten salt electrolysis.Therefore,this paper studied the viscosity of LiF-DyF3-Dy2O3-CuO molten salt system by rotating method in order to prepare Dy-Cu alloy better.The effects of temperature,the addition of single oxides(Dy2O3 or Cu20)and mixed oxides(Dy2O3 and Cu20)on the viscosity of molten salt systems were investigated.At the same time,the relationship between viscosity and temperature of molten salt was verified by Arrehnius formula,and the change rule of viscosity activation energy was calculated and analyzed.The results showed that at temperature range of 910~1030℃,the viscosity of LiF-DyF3 molten salt system decreases with the increase of temperature and the addition single oxide(Dy2O3 or Cu20).As the mass ratio of Cu20 and Dy2O3 in the molten salt increases.The viscosity activation energy increases as the amount of addition of a single oxide(Dy2O3 or Cu20)increases.The suitable temperature for preparing Dy-Cu alloy by molten salt electrolysis is 970~1000℃,WCu2O+W(Dy2O3)=2.0%andW(Cu2O):W(Dy2O3)ratio is 1:0.5.

关 键 词：Dy-Cu合金 粘度 LiF-DyF3熔盐 Dy2O3-Cu2O 

分 类 号：O645.4[理学—物理化学]