Method of reducing lining wear
AssigneeAses Brown Boveri AB
InventorsHans Ekander, Clas Ericson, Gote Tallback, Hernan Tinoco, Staffan strom
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Abstract
Lining wear in an arc heated ladle containing a bath of melt and slag is reduced by rotating the melt in a horizontal direction to provide a concave bath surface in which the slag accumulates towards the center, thus preventing the slag attacking the ladle lining. In addition to heating the charge, the arc or arcs melt(s) the slag whereas the lining is partly protected from the radiation by the concave surface. A flow perturbing means is arranged at the ladle to attain an increased homogenization and the possibility of intensified sulfur removal.
Claims11
A method of reducing lining wear in connection with heating by at least one electric arc, steel melt being stirred in a horizontal direction by means of an electromagnetic stirring device, thus creating a concave surface to the melt, wherein the slag present in the bath accumulates towards the center of the concave surface and the attack by slag against the lining is avoided, wherein said arc heats the charge and also melts the slag, but wherein the lining is partly protected from radiation heating from the arc by the outer parts of the concave surface;
- wherein a perturbing device is immersed into the interface between the melt and the slag in order to bring about an efficient mixing of the steel melt and the slag for intensifying the sulphur removal.
Dependencies are inferred from the claim text.