Stefan Pirker, Martin Egger,
"Optimisation of Steel Desulfurisation by Lime Powder Injection by Numerical Simulations"
, in BMH (Berg- und Hüttenmännische Monatshefte), Vol. 154, Nummer 11, 2009
Optimisation of Steel Desulfurisation by Lime Powder Injection by Numerical Simulations
Sprache des Titels:
This paper focuses on the simulation of steel desulphurisation by lime powder injection. Thereby, the particle laden
plume as well as additional gas stirring plumes are modelled by an multifluid Eulerian method. In addition, a transitional
heterogeneous reaction is assumed to happen between the rising lime particles and the dissolved sulphur. Furthermore,
a permanent reaction mechanism is defined at the metal-slag interface. With help of these macroscopic simulations the
desulphurisation performance of a given ladle-lance-stirrer configuration can be estimated. Once the simulations are
calibrated by steel plant experiments these simulations should be able to hint to possible geometrical or operational
improvements. Nevertheless, since a sound validation of the macroscopic simulation tool is not feasible many modelling
uncertainties remain. Therefore, in a second part this paper focuses on the detailed modelling of the initial momentum
of the injected powder which is critical for the powder penetration depth. In this context dedicated experiments are
performed in order to substantiate the boundary conditions of the macroscopic simulations.