Abstract: According to the application parameter of corundum-based refractory in refining ladle, the Johnson-cook model was chosen, erosion model for refractory in high temperature was established, erosion process of refractory in refining ladle was studied by FEM method. The effects of erosion degree, particle velocity, particle size, porosity on erosion rate of refractory in refining ladle were analyzed. The flow field of bottom blowing ladle with thermal transmission of solid and liquid coupled was considered, the erosion condition of refractory in refining ladle was discussed. The results show that: The Johnson-Cook model, which was applied to simulate ductility cutting erosion of refractory in high temperature, is appropriate and reasonable. The erosion rate with small angle degree from 15-30 is much higher, the erosion rate was decreased following the increasing of angle degree above 25. The relationship between erosion rate and particle velocity, particle size and porosity is exponential. The erosion of refractory in refining ladle is small-angle erosion, particularly in parts of ladle, the slag line near porous plug, the side wall near bottom and porous plug, and etc. performance significantly. The erosion of refractory can be weakened as the interfacial film with higher melting point and density formates.

Key words: refining ladle;corundum-based refractory;erosion;finite element