Sulfur-containing aluminum-containing steel and preparation method thereof

The invention discloses sulfur-containing and aluminum-containing steel and a preparation method thereof, and relates to the technical field of smelting. The preparation method comprises the steps of converter smelting, LF refining, RH vacuum refining and continuous casting which are carried out in sequence. And in the RH vacuum refining process, the iron sulfide supplementing amount is determined according to the sulfur content [S1]% when the LF leaves the station and the alkalinity R1 of LF refining final slag, and iron sulfide is supplemented in the vacuum state, so that the sulfur content of molten steel can reach the target sulfur content [S0]% of a process card of sulfur-containing aluminum-containing steel when the RH refining is finished. On one hand, according to the method, ferrous sulfide is supplemented under vacuum, the influence on a crystallizer can be reduced, sulfur loss caused by the fact that ferrous sulfide participates in a steel slag interface reaction can be reduced, and the cost is sav