LF(Ladle Furnace process); AOD(Argon-oxygen decaburizition process );
VOD (Vacuum oxygen decrease process) ;
RH (Ruhrstahl Heraeus process);
CAS-OB( Composition adjustments by sealed argon -oxygen blowing process) ;
喂线 (Insert thread) ;
钢包吹氩搅拌(Ladle argon stirring);
喷粉( powder injection )。