“…Frequent problems occurring during the continuous bloom casting process include: the segregation of elements, porosity, the occurrence of oscillation marks on the external bloom surface, and internal cracks [1][2][3][4]. Therefore, the selection of the parameters of mould operation, soft reduction, the temperature of casting and cooling of steel in individual zones of the casting machine should guarantee the stable formation of the shell and the uniform solidification of steel in the direction of the vertical slab axis [5][6][7][8][9]. In the continuous steel casting process, in the mould operation region, the selection of mould flux is an important issue [10].…”