| 摘要 |
<p>The invention relates to a method for manufacturing steel, wherein an advent rate caused by oxide inclusions is reduced. The steps are included as follows: a converter process for converting steel; a tapping process from steel fluid and slag to steel ladle; a slag modifying process, wherein after CaCO3 is added to the slag to generate CO2, A1 slag is spreaded to the slag to be reacted with FeO in the slag, the content of (T. Fe) is less than 10 weight% and the weight ratio of (CaO)/(Al2O3) is 1/2; a secondary refining process wherein deoxygenation is carried after decarburization is carried to the steel fluid with modified slag through an oxygen top-blown vacuum degasser, and [C] in the steel fluid is less than 100 weight ppm; and a continuous casting process, wherein secondary modified steel fluid is continuously casted, wherein the [O] in the steel fluid after secondary modification is less than 50 weight ppm.</p> |
