过热度对氧化铝溶解行为的影响  

Effect of superheat on the dissolution behavior of alumina

作　　者：王壮[1] 何飞[2] 李刚[2] 文胜毅 何武[2] 彭高红 秦胜广 关月超 高炳亮[1] 刘爱民[1] 王兆文[1] Wang Zhuang;He Fei;Li Gang;Wen Shengyi;He Wu;Peng Gaohong;Qin Shengguang;Guan Yuechao;Gao Bingliang;Liu Aimin;Wang Zhaowen(Laboratory of National Education Ministry for Eco-metallurgy of Multimetal Symbiotic Mine,Northeastern University,Shenyang 110819,China;Zunyi Aluminum Co.,Ltd,Zunyi 563100,China)

机构地区：[1]东北大学多金属共生矿生态化冶金教育部重点实验室,沈阳110819 [2]遵义铝业股份有限公司,贵州遵义563100

出　　处：《材料与冶金学报》2020年第4期240-246,共7页Journal of Materials and Metallurgy

基　　金：国家自然科学基金项目(51874086,51434005);高钾电解质体系铝电解工艺技术实验研究(2019210101004641).

摘　　要：电解质过热度控制和氧化铝质量分数控制对电解槽稳定生产非常重要.本文设计了一种新型透明槽(双温区透明槽),观测了载氟中间状氧化铝和砂状氧化铝在NaF-AlF 3-Al 2O 3-CaF 2-MgF 2-KF-LiF熔盐体系中的溶解行为,研究了过热度对氧化铝溶解行为的影响.研究结果表明:载氟中间状氧化铝的平均溶解速率受电解质组成和过热度影响较大,低过热度和高氧化铝质量分数都不利于载氟中间状氧化铝的溶解;电解质过热度对砂状氧化铝的溶解速率影响较小,砂状氧化铝的平均溶解速率在不同过热度的电解质中基本接近.It is important to control electrolyte superheat and alumina mass fraction for stable production of reduction cells.In this paper,a new type of transparent cell(two-zone transparent cell)was designed to investigate the dissolution behavior of secondary intermediate alumina and sandy alumina in NaF-AlF 3-Al 2O 3-CaF 2-MgF 2-KF-LiF molten salt system.Meanwhile,the effect of superheat of aluminum electrolyte on the dissolution behavior of alumina was investigated.The results show that the dissolution behavior of secondary intermediate alumina is greatly affected by electrolyte composition and superheat.Low superheat and high alumina mass fraction have negative effects on secondary intermediate alumina dissolution rate.Electrolyte superheat has little effect on dissolution rate of sandy alumina,whose average value varies little in different superheat electrolytes.

关 键 词：铝电解 过热度 双温区透明槽 氧化铝溶解 

分 类 号：TF09[冶金工程—冶金物理化学]