The local erosion of the slag line can be summarized into four aspects:

1. The process factor, which includes the stirring intensity, power transmission, processing time, etc. during the steel smelting process;

2. The composition of the refined slag, the influence of F, MgO, Al2O3, CaO, TFe and other elements in the slag on the slag line refractory brick ;

3. The quality of refractory materials and masonry;

4. It is mechanical damage.