Using a novel three-dimensional mathematical model proposed and developed for the non-equilibrium decarburization process during the RH refining of molten steel to the refining in a 90 t RH degasser, the decarburization of liquid steel under the conditions of RH and RH-KTB operations was dealt with.

In order to study the effect of RH-MFB refining technology on decarburization process,the overall decarburization mechanism can be divided into decarburization in bulk molten steel and floating of CO against static pressure,and decarburization on the surface of argon bubbles and splashed liquid drops.