Process and apparatus for refining steel in a metallurgical vessel
AssigneeArbed S.A.
InventorPaul Metz
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Abstract
A process and apparatus for the desulphurization, deoxidation and purification of a metal melt is presented. The process is particularly well suited for use in a ladle during the refining of steel. The present invention comprises means for defining at the surface of a melt at least a first working zone preferably via a plunger tube. Thereafter, combustible materials and oxygen are delivered to the working zone at a single impact point, preferably by a plurality of lances or by a multiple flow lance. As a result, a reactive high temperature slag is produced thereby. Finally, the melt is mixed so as to evenly distribute the heat preferably by permeable elements and/or at least one auxiliary lance.
Claims41
A process for refining steel in a metallurgical vessel having a metal melt therein, said melt having a first slag thereon, including the steps of:
- delivering a combustible material to a working zone at an impact point at the surface of said melt;
- delivering oxygen to said working zone at said impact point whereby a highly reactive second slag is produced therein;
- and
- mixing said melt whereby heat is evenly distributed therethrough.
An apparatus for refining steel in a metallurgical vessel having a metal melt therein, said melt having a first slag thereon, including:
- means for separating the surface of said melt to define at least one working zone;
- means for delivering a combustible material to said working zone at an impact point;
- means for delivering oxygen to said working zone at said impact point whereby a highly reactive second slag is produced therein;
- and
- means for mixing said melt whereby heat is evenly distributed therethrough.
Dependencies are inferred from the claim text.