| 摘要 |
<p>The present invention relates to a flux for manufacturing of ultra low-carbon steels fed in a ladle so as to secure an oxygen concentration in a molten steel in a RH process upon manufacturing ultra low-carbon steels, and provides a flux for manufacturing of ultra low-carbon steels as a subsidiary raw material fed in a molten steel tapped into a ladle after completion of converter refining upon manufacturing of ultra low-carbon steels, comprising in weight %; CaO: 45~47%, Al2O3: 10~20%, SiO2: 3~5%, MgO: 6~8%, MnO: 2~4% and other unavoidable impurities. [Reference numerals] (AA) Endpoint; (BB) BS arrival; (CC) BS departure; (DD) RH arrival</p> |
