Patent ID: 7172640
Filing Date: 2007-02-06
Classification: C21B,C21C,F27B,F27D,Y02P

Abstract:
1. A method for melting down metal-containing material which comprises: providing a metallurgical melting furnace having an interior space, a metal melt material located in the interior space of the furnace, and a slag layer floating on top of the metal melt material; conveying the metal containing material directly into a central region of the melting furnace through at least one charging tube having an opening dipping permanently into the slag layer, wherein the position of the charging tube and the insertion depth of the lower end of the charging tube into the slag layer is regulated during melting, applying energy by directing electric arcs toward the metal melt wherein the electric arcs are directed obliquely against the central region of the furnace thereby forming an energy centre in the region of the lower end of the charging tube to provide a surplus amount of energy for melting the metal-containing material, melting the metal-containing material in the slag layer, and mixing the slag metal melt.