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Modeling of Thermomechanical Damages of Steel Ladle Shell during Operations
Such vessels experience various thermal and mechanical loading cycles at high temperature. As shown by a combination of thermal modeling, finite element analysis and cumulative damage analysis, the formation of cracks in the vicinity of weldments of steel ladles is related to creep damage. The addition of a structural insulation board in the refractory lining dramatically improves the expected lifespan of the shell thanks to consistently lower shell temperatures. The insulation layer helps to preserve the integrity of the shell even if previously used without any insulation. The modeling of a full ladle assembly including the shell and the refractory lining also allows to confirm the thermomechanical damages observed in various areas of ladle shells.
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