| 摘要 |
PURPOSE:To improve the efficiency of combustion and to reduce the damage of the refractories of a converter by blowing oxygen for refining into molten steel from a turning lance and by also blowing oxygen for secondary combustion from the lance to burn gaseous CO produced by oxygen blowing at a part just above the steel bath. CONSTITUTION:While turning a top blowing lance 2 in the direction of an arrow, oxygen for refining and oxygen S for secondary combustion are blown to carry out refining and the secondary combustion of CO. At this time, the secondary combustion zone Z is continuously moved as the lance 2 is turned, so the efficiency of combustion is improved, and the damage of refractories in a fixed direction by melting is prevented. |
