Numerical Simulation of the Flow of a Molten Blast Furnace Slag in an Open Channel  

作　　者：Miguel A. Barron Joan Reyes Aristeo Garrido Miguel A. Barron;Joan Reyes;Aristeo Garrido(Departamento de Materiales, Universidad Autonoma Metropolitana Azcapotzalco, Mexico City, Mexico)

机构地区：[1]Departamento de Materiales, Universidad Autonoma Metropolitana Azcapotzalco, Mexico City, Mexico

出　　处：《World Journal of Engineering and Technology》2024年第4期963-975,共13页世界工程和技术（英文）

摘　　要：Despite its industrial importance, the flow of molten blast furnace slag in open channels has not been sufficiently studied. In this work, the unsteady non-uniform flow of a molten blast furnace slag in a rectangular open channel is numerically studied by solving the Saint-Venant equations by means of an explicit backwards finite difference scheme. An Arrhenius-type dependence of the viscosity of the slag on temperature is assumed. To calculate that viscosity, four temperatures are considered, namely 1450˚C, 1500˚C, 1550˚C and 1600˚C. To study the dynamic response of the system, a half-sinusoidal pulse with duration of 5 s is imposed at the channel entrance. According to the numerical simulations, for all the temperatures considered, the slag flow in the channel for an angle of 5 degrees is supercritical in nature. However, for an angle of 1 degree, the flow is transcritical, that is, it presents a transition from subcritical to supercritical.Despite its industrial importance, the flow of molten blast furnace slag in open channels has not been sufficiently studied. In this work, the unsteady non-uniform flow of a molten blast furnace slag in a rectangular open channel is numerically studied by solving the Saint-Venant equations by means of an explicit backwards finite difference scheme. An Arrhenius-type dependence of the viscosity of the slag on temperature is assumed. To calculate that viscosity, four temperatures are considered, namely 1450˚C, 1500˚C, 1550˚C and 1600˚C. To study the dynamic response of the system, a half-sinusoidal pulse with duration of 5 s is imposed at the channel entrance. According to the numerical simulations, for all the temperatures considered, the slag flow in the channel for an angle of 5 degrees is supercritical in nature. However, for an angle of 1 degree, the flow is transcritical, that is, it presents a transition from subcritical to supercritical.

关 键 词：Blast Furnace Slag Molten Slag Open Channel Flow Saint-Venant Equations Supercritical Flow Transcritical Flow 

分 类 号：TG1[金属学及工艺—金属学]