Numerical Analysis of the Irreversible Behavior of Corundum Castable Purging Plugs During Service

Autor: Tan Fangguan, Yawei Li, Shengli Jin, Zhu He
Rok vydání: 2021
Předmět:
Zdroj: JOM. 73:2911-2919
ISSN: 1543-1851
1047-4838
Popis: Purging plugs employed in ladles in the steel industry undergo severe thermomechanical loads owing to the cyclic operations, including preheating, transporting, stirring, and holding stages. For the smooth running of the process with less downtime, the lifespan of the purging plug needs to be aligned with the overhaul interval without failure. In the present study, to identify the thermomechanical failure mechanisms of corundum castable purging plugs with different slit structures via a quantitative evaluation method, the Drucker–Prager material constitutive model was applied to account for the irreversible behavior. The results indicate that both shear and tensile failure occur in the purging plug with rectangular slits, where the shear failure dominates in the middle of the holding stage and tensile failure appears during the stirring stage. Moreover, the premature shear failure occurs in the upper section near the working face for both types of purging plugs. The application of circular slits diminishes the stress concentration in the purging plug and changes the fracture mechanisms, extent, and occurrence time, which experience mere shear failure in the early stage of transportation.
Databáze: OpenAIRE
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