| abstract |
PROBLEM TO BE SOLVED: To control (T.Fe) in blow off slag to be low when blowing hot metal, especially dephosphorized or desiliconized and dephosphorized hot metal pretreated iron in a converter. Provides a blowing method. SOLUTION: In converter blowing, dephosphorized or desiliconized and dephosphorized hot metal pretreated pig iron is used, and CaO such as quicklime and lightly burnt dolomite is introduced immediately before or immediately after blowing, and the total blowing time is increased. After 50% or more of Si Converter blowing method characterized by introducing O 2 minutes of the (50-100%). |