Based on production data of 30 t VOD process refining stainless steels at Second Steelmaking Plant

FuSteel

the effect of C (0. 50% ~0. 93% ) and Si (0. 18% ~0. 42% ) content in liquid for VOD refining on splashing and temperature of steel in oxygen blowing process has been analyzed. Results prove that the high C and Si content (65% C

≥ 0. 22% Si) are main factors led to splashing accident in initial period of oxygen blowing

while the low C and Si content in liquid lead to insufficiency of increased temperature of liquid and influence on quality of liquid and efficiency of later refining. The steelmaking practice shows that in order to avoid splashing accident the liquid with [C] ≥0. 90% and [ Si] ≥0. 40% is not available to refine by VOD process

and before VOD oxygen blowing the C and Si content in liquid are respectively within 0. 40% ~ 0. 65% and 0. 12% ~ 0. 20%

it is able to meet the requirement of VOD refining stainless steels.