东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2007, Vol. 28 ›› Issue (4): 541-544.DOI: -

• 论著 • 上一篇    下一篇

Na_3AlF_6-AlF_3-Al_2O_3-CaF_2-LiF-NaCl系电解质密度的研究

阚洪敏;王兆文;班允刚;邱竹贤;   

  1. 东北大学材料与冶金学院;东北大学材料与冶金学院;东北大学材料与冶金学院;东北大学材料与冶金学院 辽宁沈阳110004;辽宁沈阳110004;辽宁沈阳110004;辽宁沈阳110004
  • 收稿日期:2013-06-24 修回日期:2013-06-24 出版日期:2007-04-15 发布日期:2013-06-24
  • 通讯作者: Kan, H.-M.
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(50334030)

Study on the electrolytic densities of Na3AlF6-AlF3- Al2O3-CaF2-LiF-NaCl system

Kan, Hong-Min (1); Wang, Zhao-Wen (1); Ban, Yun-Gang (1); Qiu, Zhu-Xian (1)   

  1. (1) School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China
  • Received:2013-06-24 Revised:2013-06-24 Online:2007-04-15 Published:2013-06-24
  • Contact: Kan, H.-M.
  • About author:-
  • Supported by:
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摘要： 研究了电解质中加入氯化钠,并用氯化钠取代部分氟化锂的电解质体系的密度.采用电子天平与计算机串口相结合的测量技术,根据阿基米德定律确定电解质体系的密度,误差小于1%.利用该方法,通过四因素四水平正交实验研究了Na3AlF6-AlF3(10.87%~16.67%)-Al2O3(3%)-CaF2(4%)-LiF(0~6%)-NaCl(0~8%)体系电解质密度,并且根据测量结果建立了该体系的密度数学模型:tρ(g.cm-3)=2.897 1-0.003 07AlF3(w/%)+0.003 041LiF(w/%)-0.009 32NaCl(w/%)-0.000 85t(℃).分析了不同分子比、氟化锂添加...

关键词: 铝电解, 电解质密度, 氯化钠, 氟化锂, 低温电解质

Abstract: The density of the aluminum electrolyte system where NaCl was used as an additive to substitute partly for LiF was studied. The electrolytic density was measured by an electronic balance connected to computer port according to the Archimedian law with an error less than 1%. Then, the measured electrolytic densities of Na3AlF6-AlF3 (10.87%-16.67%)-Al2O3-CaF2-LiF (0-6%)-NaCl (0-6%) system were analyzed through a 4-factor/4-level orthogonal experiment to develop a mathematical model based on those experimental results, i.e. ρt (g · cm-3) = 2.8971-0.003 07AlF3 (w/%) + 0.003041LiF (w/%)-0.00932NaCl (w/%)-0.00085t (°C). The effects of cryolite ratio and LiF and NaCl concentrations on the densities were investigated. The results showed that the addition of NaCl decreases the density of aluminum electrolyte while the addition of LiF increases that of acidic electrolyte, but mixing the two additives properly may get excellent result. The more the NaCl used to substitute for LiF, the lower the electrolytic density.

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