Liquidus temperature of electrolyte Na3AlF6-K3AlF6-AlF3-LiF-CaF2-MgF2-Al2O3 molten melts

被引：0

作者：

Fang Z. ^{[1
]}

Dang Y.-Y. ^{[1
]}

Xin P.-F. ^{[2
]}

Tian Z.-L. ^{[2
]}

Zhou L. ^{[3
]}

Zhang W.-G. ^{[2
]}

Shen B. ^{[3
]}

Zhang Z.-Y. ^{[3
]}

Zhao J.-X. ^{[1
]}

Lai Y.-Q. ^{[2
]}

机构：

[1] School of Metallurgical Engineering, Xi'an University of Architecture and Technology, Xi'an

[2] School of Metallurgy and Environment, Central South University, Changsha

[3] Qinghai Western Hydropower Company Limited, Haidong

来源：

Lai, Yan-Qing (laiyanqing@csu.edu.cn) | 1928年 / Central South University of Technology卷 / 28期

基金：

中国国家自然科学基金;

关键词：

Aluminum electrolysis; Complex electrolyte; Liquidus temperature; Lithium salts; Potassium cryolite;

D O I：

10.19476/j.ysxb.1004.0609.2018.09.24

中图分类号：

学科分类号：

摘要：

The thermal analysis was applied to study the impact of K3AlF6, LiF and AlF3 on the liquidus temperature of Na3AlF6-K3AlF6-AlF3-LiF-CaF2-MgF2-Al2O3 electrolyte molten melts, and the influence mechanism of the molten melts composition to the liquidus temperature was also investigated. The results show that the liquidus temperature of Li-containing molten melts decreases with the increase of K3AlF6 content, and when the contents of LiF in the melts are 0 and 4% respectively, with the increase of K3AlF6 content from 3% to 12%, the liquidus temperature of molten melts decreases by 27.4 ℃ and 21.2℃, respectively. LiF has the effect to reduce the liquidus temperature of K-containing molten melts. When K3AlF6 content of melts is 0 and 6%, with the increase of LiF content from 0 to 4%, the liquidus temperature of molten melts decreases by 31.2℃ and 27℃. AlF3 has the minus effect on the liquidus temperature of Li-K-containing complex molten melts, when the content of LiF in the melts is 1% and K3AlF6 content is 9%, the liquidus temperature of melts will decrease 6.3℃ with every 1% addition of AlF3. While, when the melts don't contain Li and K, the drop of the liquidus temperature with every 1% addition of AlF3 is 7.6℃. Li and K in the complex electrolyte melts exist in the form of Li2NaAlF6 and K2NaAlF6, respectively, and its content in the melts is one of the main reason affecting the liquidus temperature of the molten melts. © 2018, Science Press. All right reserved.

引用

页码：1928 / 1936

页数：8

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