Slag-supplying container for use in electric furnace for reduction processing of steel-making slag

Patent metadata

Field	Value
Publication number	US-9534266-B2
Application number	US-201314352925-A
Country	US
Kind code	B2
Filing date	Jun 27, 2013
Priority date	Jun 27, 2012
Publication date	Jan 3, 2017
Grant date	Jan 3, 2017

Abstract

This slag-supplying container of an electric furnace for reduction processing of steel-making slag includes: a container body that causes hot steel-making slag to flow to the electric furnace; a slag discharging portion connected with an electric-furnace-side slag-supplying port; a slag receiving portion that receives the hot steel-making slag supplied; a lid that opens and closes the slag receiving portion; an exhausting portion that discharges exhaust gas from the electric furnace; and, a tilting unit that tilts the container body to adjust the amount of inflow of the hot steel-making slag to the electric-furnace-side slag-supplying port.

First claim

The invention claimed is:

1. A slag-supplying container of an electric furnace for reduction processing of steel-making slag, which causes hot steel-making slag to flow to a layer of molten slag on molten iron in the electric furnace through an electric-furnace-side slag-supplying port, the slag-supplying container comprising:
a container body that includes an upper wall, a bottom wall, and a side wall disposed between the upper wall and the bottom wall, and causes the hot steel-making slag to flow to the electric furnace;
a slag discharging portion that is disposed at an end portion of the side wall of the container body and is connected with the electric-furnace-side slag-supplying port;
a slag receiving portion that is disposed to the side wall or the upper wall of the container body and receives supply of the hot steel-making slag;
a lid that opens or closes the slag receiving portion;
an exhausting portion that is disposed to the container body and discharges exhaust gas from the electric furnace; and
a tilting unit that only tilts the container body to adjust an amount of inflow of the hot steel-making slag to the electric-furnace-side slag-supplying port,
wherein an inside of the slag-supplying container is an exhaust path of the exhaust gas discharged from the electric furnace, and the electric furnace is a fixed-type furnace.

2. The slag-supplying container according to claim 1 , including a portion of which a side wall has a height gradually decreasing toward the slag discharging portion, and a space between the upper wall and the bottom wall gradually decreases toward the slag discharging portion.

3. The slag-supplying container according to claim 1 , wherein the upper wall or the side wall includes a first gas-blowing nozzle that blows oxygen or oxygen-containing gas into the container body.

4. The slag-supplying container according to claim 1 , wherein the upper wall or the side wall includes a burner.

5. The slag-supplying container according to claim 1 , wherein the upper wall or the side wall includes a melting radiation unit that supplies a slag-modifying agent in a molten form.

6. The slag-supplying container according to claim 1 , wherein the bottom wall includes a second gas-blowing nozzle that blows a mixture gas of N 2 and O 2 into the container body.

7. The slag-supplying container according to claim 1 , comprising a weight measuring unit that measures an amount of change in mass of the hot steel-making slag in the container body.

8. The slag-supplying container according to claim 1 , comprising
a carriage disposed to a lower part of the bottom wall and used for replacing the container body.

9. The slag-supplying container according to claim 1 , wherein the exhausting portion is connected to a dust collector.

Assignees

• Nippon Steel & Sumitomo Metal Corp

Inventors

• Harada Toshiya
• Arai Takashi
• FUKUMURA Hiroki

Classifications

• C21C5/527

  Charging of the electric furnace · CPC title

• C21C5/5229

  in a direct current [DC] electric arc furnace · CPC title

• C21C2300/04

  Avoiding foam formation · CPC title

• F27B3/183

  Charging of arc furnaces vertically through the roof, e.g. in three points · CPC title

• F27B19/04

  arranged for associated working · CPC title