Dc electric furnace

Abstract

Provided is a DC electric furnace using a DC electrode, the DC electric furnace including: a body that has a bottom surface on which a tapping hole is formed and has an inner space to which scraps are charged; a lower electrode that is mounted on the bottom surface of the body; and a bottom-blowing means that is provided on the bottom surface that is not interfered by the lower electrode and blows gas to the inner space of the body.

1 . A DC electric furnace using a DC electrode, the DC electric furnace comprising:
 a body that has a bottom surface on which a tapping hole is formed and has an inner space to which scraps are charged;   a lower electrode that is mounted on the bottom surface of the body; and   a bottom-blowing means that is provided on the bottom surface that is not interfered by the lower electrode and blows gas to the inner space of the body.   
     
     
         2 . The DC electric furnace of  claim 1 , wherein a plurality of bottom-blowing means are provided and are arranged at locations that are spaced from a center of the lower electrode by a predetermined distance. 
     
     
         3 . The DC electric furnace of  claim 2 , wherein when R refers to a distance from a center of the lower electrode to an inner wall of the body, which is closest to the center of the lower electrode, the bottom-blowing means are arranged at locations that are spaced apart from the center of the lower electrode by (⅝)*R˜(⅞)*R. 
     
     
         4 . The DC electric furnace of  claim 2 , wherein the bottom surface is divided into a tapping area in which the tapping hole is formed and a coke side area that is opposite to the tapping area with respect to the center of the lower electrode, and
 wherein at least one or more bottom-blowing means are arranged at locations where a first virtual line that serves as a reference of the tapping area and the coke side area is placed.   
     
     
         5 . The DC electric furnace of  claim 2 , wherein at least one or more bottom-blowing means are arranged at locations that are spaced apart from a second virtual line that passes through the center of the lower electrode and the tapping hole by the same distance, on opposite sides of the second virtual line. 
     
     
         6 . The DC electric furnace of  claim 1 , wherein the bottom surface of the body is inclined to become deeper as it goes from the inner wall to the lower electrode at a center of the bottom surface, and
 wherein a gas blowing direction of the bottom-blowing means is perpendicular to the inclined portion.   
     
     
         7 . The DC electric furnace of  claim 1 , wherein a flow rate of gas that is supplied by the bottom-blowing means is changed according to operating times.