Title:
電気炉および製鋼方法
Document Type and Number:
Japanese Patent JP7388563
Kind Code:
B2
Abstract:
Provided is a technique for melting a cold iron source by using a heat source with reduced CO2 emissions. An electric furnace is provided with a burner directed toward furnace contents. The burner includes a powder-feeding pipe, a jet hole for jetting a fuel, and a jet hole for jetting combustion-supporting gas. Hydrogen gas or a hydrogen-enriched gaseous fuel is jetted as the fuel to form a burner flame. An auxiliary material that is in a powder form or is processed into a powder form is jetted through the powder-feeding pipe so that the auxiliary material passes through an inside of the burner flame. According to a steelmaking method, an electric furnace is provided with a burner that includes a jet hole for jetting a fuel and a jet hole for jetting combustion-supporting gas and that jets a flame through the jet holes toward an inside of the electric furnace. For at least a part of duration of one-heat operation of the electric furnace, hydrogen gas or a hydrogen-enriched gaseous fuel is used as the fuel of the burner, and an auxiliary material that is in a powder form or is processed into a powder form is blown in to pass through an inside of the flame formed by the burner.
Inventors:
Tadashi Ogasawara
Ryo Kawabata
Ryo Kawabata
Application Number:
JP2022542155A
Publication Date:
November 29, 2023
Filing Date:
April 08, 2022
Export Citation:
Assignee:
JFE Steel Corporation
International Classes:
C21C5/52; C21B11/10; F27B3/22; F27D3/16
Domestic Patent References:
| JP2018016832A | ||||
| JP2002327211A | ||||
| JP2010209436A |
Foreign References:
| WO2016120943A1 | ||||
| CN111748673B |
Attorney, Agent or Firm:
Patent Attorney Ginza Maronnier Patent Office