FE-Modell eines LD-Konverters mit gemauerter MgO/C-Feuerfestauskleidung

摘要

FE-Model of a BOF with MgO/C-RefractoryLining. For steel production metallurgical vessels(e.g. converters or ladles) are used. These consistof a steel shell lined with refractory material.During operation this lining is exposed to hightemperatures. Due to the thermal expansion, highstresses are introduced into the vessel shell whichare part of the loading responsible for long-termdeformation (creep) of these vessels. The estimationof these stress quantities is very difficult and notyet fully investigated. The present paper describesthe simulation of the material-behaviour of MgO/C-bricks to identify and calibrate the used materialparameters. In a 3/D finite element model a typicalarea of 67 t LD converter(VA-Stahl Donawitz) isrepresented (unit-cell model) and used fordescription of the transient temperature risingduring heat up. For this simulation various materialmodels are used (linear-elastic, Drucker-Prager/Cap-and concrete-material) and a comparison of results is given.