Open slot manner of opening and current-carrying plug for opening open slot such as melting metal container

摘要

PURPOSE: To safely open an opening such as an iron tapping hole in a blast furnace, a remaining iron discharge hole in a main trough in a short time. ;CONSTITUTION: This opening method for opening in a molten metal vessel, etc., is characterized in that an electric conductive plug 10 is fitted to the opening hole part 5, and by energizing this plug 10, heat is generated in this plug 10 and solidified material stuk around this is made to molten state, and this plug 10 is drawn out. In the electric conductive plug 10 used in there, an annular insulating zone, where is not penetrated from one end face to the other end face of a columnar refractory electric conductive exothermic body and continued in the peripheral direction, is arranged, and this insulating zone is made as the boundary, and at the one end face side, inside part and outside part are formed, and this one end face is connected to a power source through an electrode to form the electric conductive passage in this inside part and out side part.;COPYRIGHT: (C)1993,JPO&Japio