Numerical simulation of thermal and stress field of torpedo car
Iron & steel making companies operate torpedo cars which are used to deliver liquid iron from blast furnace. Then the liquid iron is processed by the basic oxygen furnace in the steel making workshop. The desulfurization is performed during the liquid iron delivery process by injecting desulphurization agents into the liquid iron with nitrogen as the carrier gas. As a transport equipment of liquid iron, torpedo car, compared with the previous liquid iron tank, has the advantages of small temperature decrease and little iron loss. It is gradually replacing the liquid iron tank and becomes the main means of liquid iron transport. The producing process shows that: slightly temperature reduce of the steelmaking liquid iron will cause a substantial increase in energy consumption in steelmaking and continuous casting. In this paper, the temperature field and heat flux field of the tank and its shell in a 300 ton torpedo car were analyzed using ANSYS analysis software. In the thermal analysis, the nonlinear changes of physical parameters of temperature, radiation and other nonlinear factors were taken fully account when the nonlinear finite element simulation of the temperature field and heat flux field was conducted. The temperature distribution of the refractory layers, the heat flux distribution of the tank shell and the hot metal temperature drop were determined according to the initial temperature of the molten iron, the ambient temperature and the parametric study of the thermal properties of different refractory materials. The results can be useful guidance for the future design of torpedo cars in iron and steel making plants.
Zhou, Purdue University.
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