Thickness monitoring and discontinuous degradation mechanism of wear lining refractories for refining ladle

As a functional metallurgical container for molten steel, refining ladle has a great influence on the smelting safety and quality of steel. The online monitoring of the residual thickness for ladle lining was applied to increase the smelting efficiency and safety. It is found that the ladle refractories show obvious discontinuous degradation characteristics through the monitoring data. Moreover, the degradation of low-carbon magnesia–carbon brick at slag line and corundum-based castable at steel bath was calculated according to the established corrosion model and crack propagation model, respectively. The discontinuous degradation mechanism of the ladle refractories is illustrated, which is of great significance to the optimal configuration of the ladle lining refractories.