Abstract: The effectiveness of newly developed refining flux in LF refining process was systematically studied based on industrial plant trials. The results show that the newly developed refining flux could not only improve the working environment, reduce the dust pollution, but also bring fast slag formation and excellent foamability due to the high porosity of the refining flux, which is in favour of suberged arc operation, the increase of power transmissionefficiency and heat preservation of liquid steel. The mass fraction of T.Fe in refining slag could be controlled lower than 1.0 % and the slag basicity could be increased larger than 4.5 when using the newly developed refining flux, which is beneficial to the float and removal of inclusions and improve steel cleanliness. It further confirmed the feasibility and reasonability of the newly developed refining fluxin liquid steel refining.

Key words: refining flux, ladle refining, effect, application