TY - GEN

T1 - Effect of Interaction Area on the Thermodynamics and Kinetic Modelling of BOF Converter

AU - Bundschuh, Philip

AU - Schenk, Johannes

AU - Schütt, Stephanie

AU - Sormann, Axel

AU - Panhofer, Harald

PY - 2015/5/12

Y1 - 2015/5/12

N2 - The simulation of basic oxygen furnace process (BOF) deals with several complex physical and chemical phenomena.An exact model allows the optimization of the tap to tap time which reduces the operation costs and increases the productivity ofthe steel plant. Based on several assumptions a new model for BOF converter has been developed with the program MatLab®. Athermodynamic and kinetic background makes it possible to simulate the behavior of elements in metal and slag. The convertersteelmaking process is described by using one reaction zone as a heterogeneous thermodynamic system. Nearly all componentscan be conveyed between slag and metal phase as a result of simultaneous oxidation-reduction reactions on the interaction surface.Carbon is an exception due to carbon monoxide which is the oxidation product and is transferred to the gas phase.This paper deals mainly with the effect of the interfacial surface on the rate of chemical reactions between metal and formed slag.The first assumption of the contact area is based on the converter geometry. Further considerations include the viscosity of the formedslag and the change of the reaction area caused by the formation of droplets in the emulsions phase of the blowing process. The ratelimiting step of the reactions in the converter are based on material transport due to the high temperatures meanwhile the blowing. Acomparison of both assumptions presents the importance of an optimal description of the interaction area.

AB - The simulation of basic oxygen furnace process (BOF) deals with several complex physical and chemical phenomena.An exact model allows the optimization of the tap to tap time which reduces the operation costs and increases the productivity ofthe steel plant. Based on several assumptions a new model for BOF converter has been developed with the program MatLab®. Athermodynamic and kinetic background makes it possible to simulate the behavior of elements in metal and slag. The convertersteelmaking process is described by using one reaction zone as a heterogeneous thermodynamic system. Nearly all componentscan be conveyed between slag and metal phase as a result of simultaneous oxidation-reduction reactions on the interaction surface.Carbon is an exception due to carbon monoxide which is the oxidation product and is transferred to the gas phase.This paper deals mainly with the effect of the interfacial surface on the rate of chemical reactions between metal and formed slag.The first assumption of the contact area is based on the converter geometry. Further considerations include the viscosity of the formedslag and the change of the reaction area caused by the formation of droplets in the emulsions phase of the blowing process. The ratelimiting step of the reactions in the converter are based on material transport due to the high temperatures meanwhile the blowing. Acomparison of both assumptions presents the importance of an optimal description of the interaction area.

KW - interaction area

KW - BOF converter modelling, thermodynamics, kinetic

KW - thermodynamics

KW - kinetic

M3 - Conference contribution

SP - 151

EP - 154

BT - Proceedings of The 6th International Congress on the Science and Technology of Steelmaking

T2 - ICS2015

Y2 - 12 May 2015 through 14 May 2015

ER -