Application of 3-D time-dependent modeling of plasma arc to an AC Electric Arc Furnace

AUTHOR/S: ING. PIERO FRITTELLA PROF .VITTORIO COLOMBO PROF. EMANUELE GHEDINI ING. GABRIEL SOLARI CSM Università Bologna

ABSTRACT

In this work, a mathematical model of plasma arc in AC EAF configuration has been realized and validated in a collaborative project between Tenaris, CSM and the University of Bologna (UNIBO) through the realization of a 3D multiphase mathematical model including fluid-dynamics, heat transfer and electromagnetic aspects. The ANSYS-FLUENT commercial CFD code, the plasma modelling tools and in-house code for thermodynamic and transport properties calculation, developed by UNIBO to predict the behaviour of thermal plasma sources, have been identified as good stating points for AC EAF multi-physics fine element code. The atmosphere inside the EAF has been represented by a fixed mixture of CO/CO2 and Fe vapours estimating the effect on the plasma arc radiation. The model has been validated by comparison of simulations with behaviour of the industrial 75 MW EAF of Tenaris Dalmine

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