1. In the zone of axial liquation of continuously cast thick hot-rolled steel 09G2S, treated in the process of pouring with SiCa and REM, ψ is more than 3 times,a0.25 1.5 times to twice as large as these characteristics in the zone of axial liquation of steel from an ordinary melt. 2. Doping of steel with REM and calcium-silicon reduces the degree of liquation of phosphorus, titanium (by one half), manganese, and silicon (by one third), and also of sulfur and carbon; this suppresses the formation of inclusions of manganese sulfides and titanium carbonitrides which cause laminated cracking of the metal\, and it also ensures an improvement of the quality of continuously cast steel in the direction of the thickness of the rolled stock.