Effect of Decarbonized-Layer Thickness on Preheating Performance of Dry-Vibrating MgO-Based Material

Authors：Deng, Xiaodong; Li, Jianli^*; Xie, Xiao^*

Source：JOM, 2023, 75(6): 2064-2072.

DOI：10.1007/s11837-023-05729-2

• TUNDISH
• STEEL

The four-strand tundish of a steel plant was used as the prototype, and the finite element software ANSYS was used to establish the full original layer, 25% decarbonized layer and 50% decarbonized layer of the tundish model. The influences of the decarbonized layer formed by oxidation of dry-vibrating MgO-based material on temperature field and stress field of tundish were investigated. The results show that the thermal insulation performance of the tundish working layer increases, and the heat loss decreases with the increase of the thickness of the decarburized layer. When the decarbonized layer was set as 25%, the minimum temperature on the cold side of the steel shell is 16.08% lower than at the full original layer. The increase in the thickness of the decarbonized layer leads to a significant increase in the equivalent stress on the tundish. When the decarburization layer is 25%, the maximum equivalent stress on the working layer increases about six times compared to that at the full original layer. In addition, according to the strength characteristics of the dry-vibrating MgO-based material, the increase in the decarbonized layer thickness raises the possibility of damage to the working layer.