Stefan Pirker,
"Modelling steel desulphurization by lime powder injection"
: Steelsim 2009, 2009
Original Titel:
Modelling steel desulphurization by lime powder injection
Sprache des Titels:
Englisch
Original Buchtitel:
Steelsim 2009
Original Kurzfassung:
This paper focuses on the simulation of steel desulphurization by lime powder
injection. Thereby, the particle laden plume as well as additional gas stirring plumes are
modelled by an multi-fluid 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 desulphurization performance of a given ladlelance-
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.