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Recent Advances in the Modelling of Solid Flows in the Blast Furnace

机译：高炉固体流动建模的最新进展

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The solid flow inside a blast furnace is modelled using a standalone finite element program and a constitutive equation called hypo-plastic, in order to better simulate the granular material behaviour. The parameters of this constitutive equation are calibrated using data obtained from simple soil mechanics tests on coke and sinter materials, such as triaxial and oedometric devices. Steady velocity, stress and void fraction fields are obtained after several iterations of the code. Knowledge of the solids velocity field makes it possible to determine the dead man profile, as well as its renewal kinetics. Burden trajectories and time lines are also computed. Knowledge of the stress field makes it possible to compute pressures acting on the burden as well as on the walls. Finally, knowledge of void traction field makes it possible to determine gas paths. The solid flow model was validated on 2D and 3D small-scale cold blast furnaces, but the simulations never required any tuning parameter. This code is in fact an invaluable tool to determine the effect of blast furnace profile on solid flow conditions, and reciprocally.
机译：高炉内部的固体流使用独立的有限元程序和一个称为次塑性的本构方程进行建模，以便更好地模拟粒状材料的行为。本构方程的参数使用从简单的土力学对焦炭和烧结材料（例如三轴和测渗装置）进行的土壤力学测试获得的数据进行校准。在几次代码迭代之后，获得了稳定的速度，应力和空隙率字段。固体速度场的知识使得确定死角轮廓及其更新动力学成为可能。还计算了负担轨迹和时间线。对应力场的了解使得可以计算作用在负载以及墙壁上的压力。最后，了解空牵引场可以确定气体路径。固体流动模型在2D和3D小型冷高炉上进行了验证，但模拟过程不需要任何调整参数。实际上，此代码是确定高炉轮廓对固相流动条件的影响的宝贵工具，反之亦然。

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