关键词: 传热, 立式镁还原罐, 有限元分析, 屈曲应力, 优化

Abstract: In this paper, in order to solve the problem of large consumption and short life of magnesium reduction tank, the bearing capacity of the vertical magnesium reduction tank was studied with respect to temperature, number of fixed end, length and thickness of tank taking into account to the present situation of reduction process of magnesium metal at home and abroad. Finite element method was used by ANSYS software to simulate the reduction process, tank body temperature and stress fields of the reduction system. Structure characteristics and buckling stress limit of the vertical magnesium reduction tank were studied. The influence of the material volume strength of tanks was considered at the same time to figure out the rules between material volume and temperature field, and the buckling stress limit of the reduction tank. Results showed that the large difference of heating rate between the center and edge of material was affected by the conduction of material layer and endothermic of reduction reaction. The existence of the central tube could reduce the reduction period of the magnesium tank properly, which had little influence on the reduction reaction of magnesium. The high temperature load could reduce the buckling stress of the reduction tank by more than 20%, and has little effect on the deformation. Therefore, the working temperature of the reduction tank should be reduced as much as possible.

Key words: heat transfer, vertical magnesium reduction tank, finite element analysis, buckling stress, optimization