Patent ID: 8411724
Filing Date: 2013-04-02
Classification: F27B,F27D

Abstract:
1. In an electric arc furnace having a shell comprised of side walls and a bottom and a refractory layer lining the bottom and side walls, said refractory layer including continuous courses of refractory bricks along the inner surface of said side walls of said shell, a slag opening, comprised of: a sill block assembly and two jamb block assemblies defining an opening; said sill block assembly comprised of side-by-side sill blocks, each of said sill blocks having an upper end with an upper surface, a lower end with a lower surface, and an inner surface facing the interior of said furnace, said sill blocks positioned side-by-side with the upper surfaces of said side-by-side sill blocks defining an upper surface of an upper end of said sill block assembly and the lower surfaces of said side-by-side sill blocks defining a lower surface of a lower end of said sill block assembly, said lower surfaces of said sill assembly resting on said continuous courses of refractory bricks along the inner surface of said side walls of said shell with said lower end of said sill block assembly disposed between a plurality of courses of said refractory bricks; and each of said jamb block assemblies comprised of a plurality of jamb blocks positioned side-by-side, each of said jamb block assemblies having a lower end supported on said continuous courses of refractory bricks, each of said jamb block assemblies having generally opposite-facing side surfaces, each of said side surfaces of a jamb block assembly being defined entirely by a side surface of an outermost jamb block, one of said side surfaces of a jamb block assembly abutting ends of a plurality of said continuous course of refractory bricks and another side of the jamb block assembly having a portion abutting said upper end of said sill block assembly and another portion extending above the upper surface of said sill block assembly wherein said another portion of said another side of said jamb block assembly and said upper surface of said sill block assembly form the entire side and bottom respectively of said slag opening in said furnace, said sill blocks and said jamb blocks being formed of a refractory material.