Dc electric furnace

Patent metadata

Field	Value
Publication number	US-2018335215-A1
Application number	US-201515545845-A
Country	US
Kind code	A1
Filing date	Dec 24, 2015
Priority date	Dec 21, 2015
Publication date	Nov 22, 2018
Grant date	—

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.

First claim

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.

Assignees

• Posco

Inventors

• Park Sang Chae
• Shin Jong Hun
• Park Hyun Seo
• Seo Sung Mo
• Keum Chang Hun

Classifications

• F24C7/06 Primary

  Arrangement or mounting of electric heating elements · CPC title

• F27B3/08 Primary

  heated electrically, with or without any other source of heat · CPC title

• F27B3/28

  Arrangement of controlling, monitoring, alarm or the like devices · CPC title

• Y02P10/20

  Recycling · CPC title

• F27D11/10

  Disposition of electrodes · CPC title