| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To produce a high-cleanliness steel by lowering the contents of ferrioxide and manganese oxide from a slag in a ladle as well as by preventing the reformed slag being spilled out from the ladle to a tundish. <P>SOLUTION: The method for producing the high-cleanliness steel includes reforming the slag by adding a slag reducing agent into the ladle which stores molten steel tapped out from a converter and subsequently, solidifying the reformed slag by adding a MgO-containing material in the ladle which raises the melting point of the slag. In this case, it is preferable that the slag reforming agent is added right after the tapping of the molten steel from the converter, the MgO-containing material is added using an RH vacuum degassing device, and the MgO-containing material is a magnesia clinker. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
