Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
MELTING PROMOTION METHOD AND APPARATUS IN ARC TYPE ELECTRIC FURNACE FOR STEEL MAKING
Document Type and Number:
Japanese Patent JPS5669319
Kind Code:
A
Abstract:

PURPOSE: To decrease the consupmtion of electric power and shorten a melting time and generate excellent oxidation exothermic heat by feeding preheated oxygen- containing gas into a furnace and suitably compensating negative pressure in the furnace.

CONSTITUTION: A heat exchanger 11 is connected to a furnace top elbow 3 at an upper part of an electric furnace 1 provided with an electrode 2 through an exhaust gas pipe 18. A cool air feed pipe provided with a blower 14 and air conveying pipe 12 are connected to the heat exchanger 11 and air or oxygen-containing gas in which oxygen is added to the air is passed through the heat exchanger 11. The gas preheated above the room temperature is fed to the furnace through the air conveying pipe 12. In addition, this gas is branched, introduced to the circumference of the electrode 2 by an air feed branch pipe 13 to form an air seal and flow into the furnace 1. At this time, by a suction pressure of a dust collecting device sucking the exhaust gas, pressure in the furnace becomes a suitable negative pressure. By this negative pressure, the preheated oxygen gas is introduced into the furnace and the heat generation by the oxidation of the combustible composition in the charge is promoted.


Inventors:
HIRASAKA HISAHIRO
Application Number:
JP14346079A
Publication Date:
June 10, 1981
Filing Date:
November 05, 1979
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
HIRASAKA HISAHIRO
International Classes:
C21C5/52; F27D17/00; (IPC1-7): C21C5/52; F27D17/00
Domestic Patent References:
JPS5282619A1977-07-11