东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2003, Vol. 24 ›› Issue (9): 832-834.DOI: -

• 论著 • 上一篇    下一篇

氧化铝在熔融冰晶石中的溶解

徐君莉;石忠宁;高炳亮;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
  • 收稿日期:2013-06-24 修回日期:2013-06-24 出版日期:2003-09-15 发布日期:2013-06-24
  • 通讯作者: Xu, J.-L.
  • 作者简介:-
  • 基金资助:
    国家重点基础研究与发展规划项目(G1999064903)·

Dissolution of alumina in molten cryolite

Xu, Jun-Li (1); Shi, Zhong-Ning (1); Gao, Bing-Liang (1); Qiu, Zhu-Xian (1)   

  1. (1) Sch. of Mat. and Metall., Northeastern Univ., Shenyang 110004, China
  • Received:2013-06-24 Revised:2013-06-24 Online:2003-09-15 Published:2013-06-24
  • Contact: Xu, J.-L.
  • About author:-
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摘要： 利用透明石英槽对氧化铝在熔融冰晶石的溶解行为进行了研究,并用摄相机观测、拍摄了整个溶解过程,分析与讨论了氧化铝溶解的影响因素·研究认为,氧化铝在熔融冰晶石中的溶解分两步,即氧化铝快速溶解和电解质表面形成结壳的氧化铝的脱落与溶解·氧化铝在熔融冰晶石中的溶解由快变慢是由于氧化铝的加入导致电解质温度降低,在电解质表面形成氧化铝/电解质结块,使氧化铝与冰晶石接触的表面积下降·氧化铝的溶解速度与搅拌速度、氧化铝的预热温度、体系的温度和氧化铝的种类有关·

关键词: 透明石英槽, 氧化铝, 熔融冰晶石, 溶解速度, 结壳, 接触面积

Abstract: The dissolution behavior of alumina in molten cryolite was investigated by using a transparent quartz crucible, where the dissolution process was recorded by a video camera. The influencing factors of dissolution velocity of alumina were analyzed and discussed. The results show that there are two stages in dissolution process, i.e., the rapid dissolution and the peeling-off dissolution of alumina crusted with electrolyte. The alumina dissolves at different velocities in molten cryolite because when feeding the alumina into the crucible, the temperature of electrolyte decreases so as to form alumina/electrolyte agglomerate on the surface of electrolyte to reduce the contact area between alumina and cryolite. The dissolution velocity of alumina rates to the stirring rate, preheating temperature of alumina, melt temperature and the kinds of alumina used.

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