Title:
ELECTRIC FURNACE AND STEELMAKING METHOD
Document Type and Number:
WIPO Patent Application WO/2022/234762
Kind Code:
A1
Abstract:
Provided is a technique for melting a cold iron source using a heat source having reduced CO2 emissions. Provided is an electric furnace in which a burner is arranged so as to face the furnace contents, the burner being equipped with a powder supply pipe, an injection hole for ejecting fuel, and an injection hole for ejecting combustible gas, and being configured such that hydrogen gas or a hydrogen-enriched gaseous fuel is injected as fuel to form a burner flame, a powdery or powdered auxiliary raw material is injected from the powder supply pipe, and the auxiliary raw material passes through the burner flame. Also provided is a steelmaking method in which: an injection hole for ejecting fuel and an injection hole for ejecting a combustible gas are provided in an electric furnace; a burner is arranged, the burner injecting a flame from the injection hole into the furnace; hydrogen gas or a hydrogen-enriched gaseous fuel is used as burner fuel during at least part of one heating operation of the electric furnace; and a powdery or powdered auxiliary raw material is blown in so as to pass through the flame formed by the burner.
Inventors:
OGASAWARA FUTOSHI (JP)
KAWABATA RYO (JP)
KAWABATA RYO (JP)
Application Number:
PCT/JP2022/017372
Publication Date:
November 10, 2022
Filing Date:
April 08, 2022
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
C21C5/52; C21B11/10; C21C7/072; F23D17/00; F27B3/08; F27B3/18; F27B3/20; F27B3/22; F27D11/06; F27D11/08
Foreign References:
| JP2018016832A | 2018-02-01 | |||
| JP2002327211A | 2002-11-15 | |||
| JP2010209436A | 2010-09-24 | |||
| JP2020046098A | 2020-03-26 | |||
| JP2021025713A | 2021-02-22 | |||
| JP2020046099A | 2020-03-26 |
Attorney, Agent or Firm:
GINZA MARONIE P.C. (JP)
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