Abstract：In this paper the technologic research of the ultra low sulfur steel based on the production of X70/X80 pipe-line steel was discussed. The control of [S] content during BOF blowing and LF refining were analysed, the sulfur pickup during BOF blowing was mainly caused by molten iron slag after pretreatment and scrap, the LF deep desulfuriztion depends on the control of the top slag and the strong stirring power. By technologic adjustment, the [S] at the end of LF was stability controled below 0.0050%, and the average [S] was 0.0011%.
2010, Vol. 45 
