摘要
熔盐电解工艺中的支持电解质需具备良好的导电性、较低的黏度,同时兼顾表面张力、密度、熔融温度等理化性质。本文基于前人熔盐电解工艺研究,借助高温熔体物性测试系统,研究了不同温度(750℃、800℃、850℃、900℃、950℃、1000℃)和不同摩尔比(Li F/Na F=1.5、1.2、1.0、0.8、0.6、0.4)对氟化盐二元体系LiF-Na F熔盐混合物的密度、黏度、表面张力和电导率等理化性质的影响。结果表明,LiF-Na F熔盐体系的密度随温度升高而减小,随Li F与Na F摩尔比下降而增大;LiF-Na F熔盐体系的黏度随温度升高而降低,在950℃后趋于稳定,随Li F与Na F摩尔比下降而降低;LiF-Na F熔盐体系的表面张力随温度升高而下降,随Li F与Na F摩尔比下降而降低;LiFNa F熔盐体系的电导率随温度升高而升高,随Li F与Na F摩尔比下降而降低。采用LiF-Na F熔盐体系时,应针对具体电解目标产物选用最适宜摩尔比和温度。
The supporting electrolyte in the molten salt electrolysis process needs to have good conductivity,low viscosity,and take into account the physical and chemical properties such as surface tension,density,and melting temperature.In this paper,based on the previous research of molten salt electrolysis process,the effects of different temperatures(750℃,800℃,850℃,900℃,950℃,1000℃)and different molar ratios(LiF/NaF=1.5,1.2,1.0,0.8,0.6,0.4)on the density,viscosity,surface tension and conductivity of LiF-NaF molten salt mixture of fluoride binary system were studied by means of high temperature melt physical property test system.The results show that the density of the LiF-NaF molten salt system decreases with the increase of temperature and increases with the decrease of the molar ratio of LiF to NaF.The viscosity of LiF-NaF molten salt system decreases with the increase of temperature,and tends to be stable after 950℃.It decreases with the decrease of the molar ratio of LiF to NaF.The surface tension of the LiF-NaF molten salt system decreases with the increase of temperature and the decrease of the molar ratio of LiF to NaF.The electrical conductivity of LiF-NaF molten salt system increases with the increase of temperature and decreases with the decrease of LiF/NaF molar ratio.When using LiF-NaF molten salt system,the most suitable molar ratio and temperature should be selected for specific electrolysis target products.
作者
王晨雪
那维克然·塞力木
何艳君
王守明
陈方永
李念念
黄建国
翁鸿蒙
WANG Chenxue;Naweikeran·Sailimu;HE Yanjun;WANG Shouming;CHEN Fangyong;LI Niannian;HUANG Jianguo;WENG Hongmeng(Xinjiang Nonferrous Metals Research Institute Co.,Ltd,Urumqi 830026,China)
出处
《绿色矿冶》
2025年第6期7-12,共6页
Sustainable Mining and Metallurgy
基金
新疆维吾尔自治区“天山英才”培养计划(2022TSYCJC0044)
国家重点研发计划青年科学家项目(2021YFC2901400)
新疆维吾尔自治区重点研发任务专项(2022B01039)。
关键词
熔盐体系
密度
黏度
表面张力
电导率
molten salt system
density
viscosity
surface tension
conductivity
