160 kA预焙铝电解槽在低分子比和 低温条件下的三维电热场

来源期刊：中南大学学报(自然科学版)2004年第6期

论文作者：李劼 邓星球 赖延清 刘凤琴 刘业翔

文章页码：875 - 879

关键词：铝电解槽;低分子比;电热场;有限元; ANSYS软件

Key words：aluminumreduction cell; lowcryolitic ratio; thermo-electric field; finite element method; ANSYS software

摘    要：利用有限元分析软件ANSYS建立了160 kA铝电解槽1/4整槽的三维实体模型和有限元模型。在假定的合适边界条件下,对比分析了电解槽在转变为低分子比、低温条件下前、后的三维电热场分布情况。仿真结果表明:当电解槽转变为低分子比、低温条件后,伸腿增长,结壳增厚,槽底更冷;电解质初晶等温线在底部耐火砖中的位置由中部上移,靠近阴极炭块底部,在端部阴极炭块内水平方向等温线倾斜较大;当降低电解质分子比和电解温度时,增强端部2个炭块高度方向上导热性能,并进行相应的电解工艺和电解槽结构的改进,才有利于提高电流效率。

Abstract: The three-dimensional thermo-electric solid and Finite ElementModels of the full quarter 160 kA aluminum reduction cell were built by using finite analytic procedure ANSYS. Under reasonable assumption of boundary conditions, the thermo-electric fieldwas computed. The results showthat under the technologic conditions of low cryolitic ratio and electrolytic temperature, the bottom of the reduction cell becomes colder; the width of the freeze profile increases; the ledge toe becomes longer; and the liquidus isotherms move up near the bottom of the cathodes. And atthe end ofthe cell, the liquidus isotherms in the cathode blockt end to flat; increasing thermal properties of the end blocks and changing technologies under low cryolitic ratio conditions are of beneficial to improve the efficiency of current.