| 摘要 |
PURPOSE:To reduce and desulfurize efficiently molten Cr steel by adding Al and CaO to the steel in the final stage of decarburization and blowing gaseous Ar so as to adjust the amounts of SiO2, CaO and Al2O3 in slag to prescribed percentages. CONSTITUTION:When molten Cr steel is refined, metallic Al and CaO as a slag forming agent are added to the steel in the final stage of decarburization, and gaseous Ar is blown to agitate the steel and slag. The amount of SiO2 in the slag is adjusted to <=10% and the ratio of (CaO%)/(Al2O3%) in the slag to 1.4- 2. The refining time is considerably shortened, and the consumption unit of the secondary starting materials used is reduced.
|
