流水线镁电解熔盐体系密度的研究

Density of molten salt system for flow line magnesium electrolysis

摘要: 利用阿基米德方法研究流水线镁电解熔盐体系密度, 旨在确定适合于流水线镁电解熔盐的较优控制参数, 为生产提供指导, 为同行提供理论参考.研究结果表明:在MgCl₂-KCl-NaCl熔盐体系中, 随着氯化镁的浓度增加, 熔盐的密度增大; 随着氯化钾浓度的增加, 熔盐的密度减小; 随着氯化钠浓度的增加, 高钾含量的熔盐密度增大, 高镁含量的熔盐密度减小.当体系中出现KMgCl₃时, 熔盐的密度急剧增大; 当体系中出现K₂MgCl₄时, 熔盐的密度急剧减小.在生产中, 熔盐组分较优控制范围为: W_KCl: 50 %~70 %, W_NaCl: 18 %~23 %, W_MgCl₂: 12 %~18 %; 熔盐温度较优控制范围为: 680~700 ℃.

Abstract: The molten salt density of the flow line magnesium electrolysis was studied by Archimedes method to determine the optimal parameters. The results show that molten salt density increases with the rising concentration of MgCl₂ in MgCl₂-KCl-NaCl system. However, molten salt density decreases with the increasing concentration of KCl. With the increase of NaCl concentration, the molten salt density of high KCl contents increases, while that of high MgCl₂ content decreases. The density of molten salt increases sharply when KMgCl₃ occurs in the system. The optimal range of component in the production are listed: W_KCl: W_KCl: 50 %~70 %, W_NaCl: 18 %~23 %, W_MgCl₂: 12 %~18 %; temperature: 680~700 ℃.